From ec763f0de879fa1a64b7641098271107f5e32c67 Mon Sep 17 00:00:00 2001 From: Rabin Vincent Date: Fri, 19 Nov 2010 21:11:02 +0530 Subject: ARM: versatile: ensure sched_clock() is notrace Include sched.h to ensure sched_clock() has the notrace annotation. Signed-off-by: Rabin Vincent diff --git a/arch/arm/plat-versatile/sched-clock.c b/arch/arm/plat-versatile/sched-clock.c index 9768cf7..9696ddc 100644 --- a/arch/arm/plat-versatile/sched-clock.c +++ b/arch/arm/plat-versatile/sched-clock.c @@ -20,6 +20,7 @@ */ #include #include +#include #include #include -- cgit v0.10.2 From 61b5cb1c3bff8875d2fd289c7b6ac344f95261fa Mon Sep 17 00:00:00 2001 From: Rabin Vincent Date: Thu, 7 Oct 2010 20:51:58 +0530 Subject: ARM: place C irq handlers in IRQ_ENTRY for ftrace When FUNCTION_GRAPH_TRACER is enabled, place do_IRQ() and friends in the IRQ_ENTRY section so that the irq-related features of the function graph tracer work. Signed-off-by: Rabin Vincent diff --git a/arch/arm/include/asm/system.h b/arch/arm/include/asm/system.h index 1120f18..ec4327a 100644 --- a/arch/arm/include/asm/system.h +++ b/arch/arm/include/asm/system.h @@ -63,6 +63,11 @@ #include #define __exception __attribute__((section(".exception.text"))) +#ifdef CONFIG_FUNCTION_GRAPH_TRACER +#define __exception_irq_entry __irq_entry +#else +#define __exception_irq_entry __exception +#endif struct thread_info; struct task_struct; diff --git a/arch/arm/include/asm/traps.h b/arch/arm/include/asm/traps.h index 491960b..124475a 100644 --- a/arch/arm/include/asm/traps.h +++ b/arch/arm/include/asm/traps.h @@ -15,13 +15,32 @@ struct undef_hook { void register_undef_hook(struct undef_hook *hook); void unregister_undef_hook(struct undef_hook *hook); +#ifdef CONFIG_FUNCTION_GRAPH_TRACER +static inline int __in_irqentry_text(unsigned long ptr) +{ + extern char __irqentry_text_start[]; + extern char __irqentry_text_end[]; + + return ptr >= (unsigned long)&__irqentry_text_start && + ptr < (unsigned long)&__irqentry_text_end; +} +#else +static inline int __in_irqentry_text(unsigned long ptr) +{ + return 0; +} +#endif + static inline int in_exception_text(unsigned long ptr) { extern char __exception_text_start[]; extern char __exception_text_end[]; + int in; + + in = ptr >= (unsigned long)&__exception_text_start && + ptr < (unsigned long)&__exception_text_end; - return ptr >= (unsigned long)&__exception_text_start && - ptr < (unsigned long)&__exception_text_end; + return in ? : __in_irqentry_text(ptr); } extern void __init early_trap_init(void); diff --git a/arch/arm/kernel/irq.c b/arch/arm/kernel/irq.c index 36ad3be..6d61633 100644 --- a/arch/arm/kernel/irq.c +++ b/arch/arm/kernel/irq.c @@ -35,6 +35,7 @@ #include #include #include +#include #include #include @@ -105,7 +106,8 @@ unlock: * come via this function. Instead, they should provide their * own 'handler' */ -asmlinkage void __exception asm_do_IRQ(unsigned int irq, struct pt_regs *regs) +asmlinkage void __exception_irq_entry +asm_do_IRQ(unsigned int irq, struct pt_regs *regs) { struct pt_regs *old_regs = set_irq_regs(regs); diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c index 8c19595..bbca898 100644 --- a/arch/arm/kernel/smp.c +++ b/arch/arm/kernel/smp.c @@ -16,6 +16,7 @@ #include #include #include +#include #include #include #include @@ -457,7 +458,7 @@ static void ipi_timer(void) } #ifdef CONFIG_LOCAL_TIMERS -asmlinkage void __exception do_local_timer(struct pt_regs *regs) +asmlinkage void __exception_irq_entry do_local_timer(struct pt_regs *regs) { struct pt_regs *old_regs = set_irq_regs(regs); int cpu = smp_processor_id(); @@ -544,7 +545,7 @@ static void ipi_cpu_stop(unsigned int cpu) * * Bit 0 - Inter-processor function call */ -asmlinkage void __exception do_IPI(struct pt_regs *regs) +asmlinkage void __exception_irq_entry do_IPI(struct pt_regs *regs) { unsigned int cpu = smp_processor_id(); struct ipi_data *ipi = &per_cpu(ipi_data, cpu); diff --git a/arch/arm/kernel/vmlinux.lds.S b/arch/arm/kernel/vmlinux.lds.S index cead889..897c1a8 100644 --- a/arch/arm/kernel/vmlinux.lds.S +++ b/arch/arm/kernel/vmlinux.lds.S @@ -101,6 +101,7 @@ SECTIONS __exception_text_start = .; *(.exception.text) __exception_text_end = .; + IRQENTRY_TEXT TEXT_TEXT SCHED_TEXT LOCK_TEXT -- cgit v0.10.2 From d3b9dc9dd2b994f396741f7086ffe7a48bacb165 Mon Sep 17 00:00:00 2001 From: Rabin Vincent Date: Thu, 7 Oct 2010 17:39:47 +0530 Subject: ARM: ftrace: use gas macros to avoid code duplication Use assembler macros to avoid copy/pasting code between the implementations of the two variants of the mcount call. Signed-off-by: Rabin Vincent diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S index 8bfa987..fe1d586 100644 --- a/arch/arm/kernel/entry-common.S +++ b/arch/arm/kernel/entry-common.S @@ -141,98 +141,112 @@ ENDPROC(ret_from_fork) #endif #endif -#ifdef CONFIG_DYNAMIC_FTRACE -ENTRY(__gnu_mcount_nc) - mov ip, lr - ldmia sp!, {lr} - mov pc, ip -ENDPROC(__gnu_mcount_nc) +.macro __mcount suffix + mcount_enter + ldr r0, =ftrace_trace_function + ldr r2, [r0] + adr r0, .Lftrace_stub + cmp r0, r2 + bne 1f + mcount_exit -ENTRY(ftrace_caller) - stmdb sp!, {r0-r3, lr} - mov r0, lr +1: mcount_get_lr r1 @ lr of instrumented func + mov r0, lr @ instrumented function + sub r0, r0, #MCOUNT_INSN_SIZE + adr lr, BSYM(2f) + mov pc, r2 +2: mcount_exit +.endm + +.macro __ftrace_caller suffix + mcount_enter + + mcount_get_lr r1 @ lr of instrumented func + mov r0, lr @ instrumented function sub r0, r0, #MCOUNT_INSN_SIZE - ldr r1, [sp, #20] - .global ftrace_call -ftrace_call: + .globl ftrace_call\suffix +ftrace_call\suffix: bl ftrace_stub - ldmia sp!, {r0-r3, ip, lr} - mov pc, ip -ENDPROC(ftrace_caller) + + mcount_exit +.endm #ifdef CONFIG_OLD_MCOUNT +/* + * mcount + */ + +.macro mcount_enter + stmdb sp!, {r0-r3, lr} +.endm + +.macro mcount_get_lr reg + ldr \reg, [fp, #-4] +.endm + +.macro mcount_exit + ldr lr, [fp, #-4] + ldmia sp!, {r0-r3, pc} +.endm + ENTRY(mcount) +#ifdef CONFIG_DYNAMIC_FTRACE stmdb sp!, {lr} ldr lr, [fp, #-4] ldmia sp!, {pc} +#else + __mcount _old +#endif ENDPROC(mcount) +#ifdef CONFIG_DYNAMIC_FTRACE ENTRY(ftrace_caller_old) - stmdb sp!, {r0-r3, lr} - ldr r1, [fp, #-4] - mov r0, lr - sub r0, r0, #MCOUNT_INSN_SIZE - - .globl ftrace_call_old -ftrace_call_old: - bl ftrace_stub - ldr lr, [fp, #-4] @ restore lr - ldmia sp!, {r0-r3, pc} + __ftrace_caller _old ENDPROC(ftrace_caller_old) #endif -#else +.purgem mcount_enter +.purgem mcount_get_lr +.purgem mcount_exit +#endif -ENTRY(__gnu_mcount_nc) +/* + * __gnu_mcount_nc + */ + +.macro mcount_enter stmdb sp!, {r0-r3, lr} - ldr r0, =ftrace_trace_function - ldr r2, [r0] - adr r0, .Lftrace_stub - cmp r0, r2 - bne gnu_trace +.endm + +.macro mcount_get_lr reg + ldr \reg, [sp, #20] +.endm + +.macro mcount_exit ldmia sp!, {r0-r3, ip, lr} mov pc, ip +.endm -gnu_trace: - ldr r1, [sp, #20] @ lr of instrumented routine - mov r0, lr - sub r0, r0, #MCOUNT_INSN_SIZE - adr lr, BSYM(1f) - mov pc, r2 -1: - ldmia sp!, {r0-r3, ip, lr} +ENTRY(__gnu_mcount_nc) +#ifdef CONFIG_DYNAMIC_FTRACE + mov ip, lr + ldmia sp!, {lr} mov pc, ip +#else + __mcount +#endif ENDPROC(__gnu_mcount_nc) -#ifdef CONFIG_OLD_MCOUNT -/* - * This is under an ifdef in order to force link-time errors for people trying - * to build with !FRAME_POINTER with a GCC which doesn't use the new-style - * mcount. - */ -ENTRY(mcount) - stmdb sp!, {r0-r3, lr} - ldr r0, =ftrace_trace_function - ldr r2, [r0] - adr r0, ftrace_stub - cmp r0, r2 - bne trace - ldr lr, [fp, #-4] @ restore lr - ldmia sp!, {r0-r3, pc} - -trace: - ldr r1, [fp, #-4] @ lr of instrumented routine - mov r0, lr - sub r0, r0, #MCOUNT_INSN_SIZE - mov lr, pc - mov pc, r2 - ldr lr, [fp, #-4] @ restore lr - ldmia sp!, {r0-r3, pc} -ENDPROC(mcount) +#ifdef CONFIG_DYNAMIC_FTRACE +ENTRY(ftrace_caller) + __ftrace_caller +ENDPROC(ftrace_caller) #endif -#endif /* CONFIG_DYNAMIC_FTRACE */ +.purgem mcount_enter +.purgem mcount_get_lr +.purgem mcount_exit ENTRY(ftrace_stub) .Lftrace_stub: -- cgit v0.10.2 From 376cfa8730c08c0394d0aa1d4a80fd8c9971f323 Mon Sep 17 00:00:00 2001 From: Tim Bird Date: Sat, 9 Oct 2010 22:24:38 +0530 Subject: ARM: ftrace: function graph tracer support Cc: Tim Bird [rabin@rab.in: rebase on top of latest code, keep code in ftrace.c instead of separate file, check for ftrace_graph_entry also] Signed-off-by: Rabin Vincent diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile index 5b9b268..679851a 100644 --- a/arch/arm/kernel/Makefile +++ b/arch/arm/kernel/Makefile @@ -5,7 +5,7 @@ CPPFLAGS_vmlinux.lds := -DTEXT_OFFSET=$(TEXT_OFFSET) AFLAGS_head.o := -DTEXT_OFFSET=$(TEXT_OFFSET) -ifdef CONFIG_DYNAMIC_FTRACE +ifdef CONFIG_FUNCTION_TRACER CFLAGS_REMOVE_ftrace.o = -pg endif @@ -33,6 +33,7 @@ obj-$(CONFIG_SMP) += smp.o obj-$(CONFIG_HAVE_ARM_SCU) += smp_scu.o obj-$(CONFIG_HAVE_ARM_TWD) += smp_twd.o obj-$(CONFIG_DYNAMIC_FTRACE) += ftrace.o +obj-$(CONFIG_FUNCTION_GRAPH_TRACER) += ftrace.o obj-$(CONFIG_KEXEC) += machine_kexec.o relocate_kernel.o obj-$(CONFIG_KPROBES) += kprobes.o kprobes-decode.o obj-$(CONFIG_ATAGS_PROC) += atags.o diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S index fe1d586..9f17662 100644 --- a/arch/arm/kernel/entry-common.S +++ b/arch/arm/kernel/entry-common.S @@ -148,6 +148,20 @@ ENDPROC(ret_from_fork) adr r0, .Lftrace_stub cmp r0, r2 bne 1f + +#ifdef CONFIG_FUNCTION_GRAPH_TRACER + ldr r1, =ftrace_graph_return + ldr r2, [r1] + cmp r0, r2 + bne ftrace_graph_caller\suffix + + ldr r1, =ftrace_graph_entry + ldr r2, [r1] + ldr r0, =ftrace_graph_entry_stub + cmp r0, r2 + bne ftrace_graph_caller\suffix +#endif + mcount_exit 1: mcount_get_lr r1 @ lr of instrumented func @@ -172,6 +186,15 @@ ftrace_call\suffix: mcount_exit .endm +.macro __ftrace_graph_caller + sub r0, fp, #4 @ &lr of instrumented routine (&parent) + mov r1, lr @ instrumented routine (func) + sub r1, r1, #MCOUNT_INSN_SIZE + mov r2, fp @ frame pointer + bl prepare_ftrace_return + mcount_exit +.endm + #ifdef CONFIG_OLD_MCOUNT /* * mcount @@ -206,6 +229,12 @@ ENTRY(ftrace_caller_old) ENDPROC(ftrace_caller_old) #endif +#ifdef CONFIG_FUNCTION_GRAPH_TRACER +ENTRY(ftrace_graph_caller_old) + __ftrace_graph_caller +ENDPROC(ftrace_graph_caller_old) +#endif + .purgem mcount_enter .purgem mcount_get_lr .purgem mcount_exit @@ -244,10 +273,27 @@ ENTRY(ftrace_caller) ENDPROC(ftrace_caller) #endif +#ifdef CONFIG_FUNCTION_GRAPH_TRACER +ENTRY(ftrace_graph_caller) + __ftrace_graph_caller +ENDPROC(ftrace_graph_caller) +#endif + .purgem mcount_enter .purgem mcount_get_lr .purgem mcount_exit +#ifdef CONFIG_FUNCTION_GRAPH_TRACER + .globl return_to_handler +return_to_handler: + stmdb sp!, {r0-r3} + mov r0, fp @ frame pointer + bl ftrace_return_to_handler + mov lr, r0 @ r0 has real ret addr + ldmia sp!, {r0-r3} + mov pc, lr +#endif + ENTRY(ftrace_stub) .Lftrace_stub: mov pc, lr diff --git a/arch/arm/kernel/ftrace.c b/arch/arm/kernel/ftrace.c index 971ac8c..7a702a5 100644 --- a/arch/arm/kernel/ftrace.c +++ b/arch/arm/kernel/ftrace.c @@ -24,6 +24,7 @@ #define NOP 0xe8bd4000 /* pop {lr} */ #endif +#ifdef CONFIG_DYNAMIC_FTRACE #ifdef CONFIG_OLD_MCOUNT #define OLD_MCOUNT_ADDR ((unsigned long) mcount) #define OLD_FTRACE_ADDR ((unsigned long) ftrace_caller_old) @@ -193,3 +194,36 @@ int __init ftrace_dyn_arch_init(void *data) return 0; } +#endif /* CONFIG_DYNAMIC_FTRACE */ + +#ifdef CONFIG_FUNCTION_GRAPH_TRACER +void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr, + unsigned long frame_pointer) +{ + unsigned long return_hooker = (unsigned long) &return_to_handler; + struct ftrace_graph_ent trace; + unsigned long old; + int err; + + if (unlikely(atomic_read(¤t->tracing_graph_pause))) + return; + + old = *parent; + *parent = return_hooker; + + err = ftrace_push_return_trace(old, self_addr, &trace.depth, + frame_pointer); + if (err == -EBUSY) { + *parent = old; + return; + } + + trace.func = self_addr; + + /* Only trace if the calling function expects to */ + if (!ftrace_graph_entry(&trace)) { + current->curr_ret_stack--; + *parent = old; + } +} +#endif /* CONFIG_FUNCTION_GRAPH_TRACER */ -- cgit v0.10.2 From dd686eb13959e49a1112fd608c124ab711050582 Mon Sep 17 00:00:00 2001 From: Rabin Vincent Date: Sat, 6 Nov 2010 23:03:21 +0530 Subject: ARM: ftrace: graph tracer + dynamic ftrace Support the graph tracer + dynamic ftrace combination on ARM. Signed-off-by: Rabin Vincent diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S index 9f17662..aae802e 100644 --- a/arch/arm/kernel/entry-common.S +++ b/arch/arm/kernel/entry-common.S @@ -183,12 +183,24 @@ ENDPROC(ret_from_fork) ftrace_call\suffix: bl ftrace_stub +#ifdef CONFIG_FUNCTION_GRAPH_TRACER + .globl ftrace_graph_call\suffix +ftrace_graph_call\suffix: + mov r0, r0 +#endif + mcount_exit .endm .macro __ftrace_graph_caller sub r0, fp, #4 @ &lr of instrumented routine (&parent) +#ifdef CONFIG_DYNAMIC_FTRACE + @ called from __ftrace_caller, saved in mcount_enter + ldr r1, [sp, #16] @ instrumented routine (func) +#else + @ called from __mcount, untouched in lr mov r1, lr @ instrumented routine (func) +#endif sub r1, r1, #MCOUNT_INSN_SIZE mov r2, fp @ frame pointer bl prepare_ftrace_return diff --git a/arch/arm/kernel/ftrace.c b/arch/arm/kernel/ftrace.c index 7a702a5..c0062ad 100644 --- a/arch/arm/kernel/ftrace.c +++ b/arch/arm/kernel/ftrace.c @@ -60,9 +60,9 @@ static unsigned long adjust_address(struct dyn_ftrace *rec, unsigned long addr) } #endif -/* construct a branch (BL) instruction to addr */ #ifdef CONFIG_THUMB2_KERNEL -static unsigned long ftrace_call_replace(unsigned long pc, unsigned long addr) +static unsigned long ftrace_gen_branch(unsigned long pc, unsigned long addr, + bool link) { unsigned long s, j1, j2, i1, i2, imm10, imm11; unsigned long first, second; @@ -84,15 +84,22 @@ static unsigned long ftrace_call_replace(unsigned long pc, unsigned long addr) j2 = (!i2) ^ s; first = 0xf000 | (s << 10) | imm10; - second = 0xd000 | (j1 << 13) | (j2 << 11) | imm11; + second = 0x9000 | (j1 << 13) | (j2 << 11) | imm11; + if (link) + second |= 1 << 14; return (second << 16) | first; } #else -static unsigned long ftrace_call_replace(unsigned long pc, unsigned long addr) +static unsigned long ftrace_gen_branch(unsigned long pc, unsigned long addr, + bool link) { + unsigned long opcode = 0xea000000; long offset; + if (link) + opcode |= 1 << 24; + offset = (long)addr - (long)(pc + 8); if (unlikely(offset < -33554432 || offset > 33554428)) { /* Can't generate branches that far (from ARM ARM). Ftrace @@ -104,10 +111,15 @@ static unsigned long ftrace_call_replace(unsigned long pc, unsigned long addr) offset = (offset >> 2) & 0x00ffffff; - return 0xeb000000 | offset; + return opcode | offset; } #endif +static unsigned long ftrace_call_replace(unsigned long pc, unsigned long addr) +{ + return ftrace_gen_branch(pc, addr, true); +} + static int ftrace_modify_code(unsigned long pc, unsigned long old, unsigned long new) { @@ -226,4 +238,51 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr, *parent = old; } } + +#ifdef CONFIG_DYNAMIC_FTRACE +extern unsigned long ftrace_graph_call; +extern unsigned long ftrace_graph_call_old; +extern void ftrace_graph_caller_old(void); + +static int __ftrace_modify_caller(unsigned long *callsite, + void (*func) (void), bool enable) +{ + unsigned long caller_fn = (unsigned long) func; + unsigned long pc = (unsigned long) callsite; + unsigned long branch = ftrace_gen_branch(pc, caller_fn, false); + unsigned long nop = 0xe1a00000; /* mov r0, r0 */ + unsigned long old = enable ? nop : branch; + unsigned long new = enable ? branch : nop; + + return ftrace_modify_code(pc, old, new); +} + +static int ftrace_modify_graph_caller(bool enable) +{ + int ret; + + ret = __ftrace_modify_caller(&ftrace_graph_call, + ftrace_graph_caller, + enable); + +#ifdef CONFIG_OLD_MCOUNT + if (!ret) + ret = __ftrace_modify_caller(&ftrace_graph_call_old, + ftrace_graph_caller_old, + enable); +#endif + + return ret; +} + +int ftrace_enable_ftrace_graph_caller(void) +{ + return ftrace_modify_graph_caller(true); +} + +int ftrace_disable_ftrace_graph_caller(void) +{ + return ftrace_modify_graph_caller(false); +} +#endif /* CONFIG_DYNAMIC_FTRACE */ #endif /* CONFIG_FUNCTION_GRAPH_TRACER */ -- cgit v0.10.2 From 0e341af835fdf553820a1fa98341b93ab32ce466 Mon Sep 17 00:00:00 2001 From: Rabin Vincent Date: Sat, 6 Nov 2010 23:03:53 +0530 Subject: ARM: ftrace: enable function graph tracer Add the options to enable the function graph tracer on ARM. Function graph tracer support requires frame pointers, so exclude Thumb-2 and also make sure FRAME_POINTER gets enabled when FUNCTION_GRAPH_TRACER is used, since FUNCTION_TRACER doesn't "select FRAME_POINTER" when ARM_UNWIND is used. Therefore, with GCC 4.4.0+, you get plain function tracing without frame pointers, but you'll need them if you want function graph tracing. Acked-by: Catalin Marinas Signed-off-by: Rabin Vincent diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 8ae3d48..bd620a4 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -14,6 +14,7 @@ config ARM select HAVE_FUNCTION_TRACER if (!XIP_KERNEL) select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL) select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL) + select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL) select HAVE_GENERIC_DMA_COHERENT select HAVE_KERNEL_GZIP select HAVE_KERNEL_LZO diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug index 2fd0b99..eac6208 100644 --- a/arch/arm/Kconfig.debug +++ b/arch/arm/Kconfig.debug @@ -23,7 +23,7 @@ config STRICT_DEVMEM config FRAME_POINTER bool depends on !THUMB2_KERNEL - default y if !ARM_UNWIND + default y if !ARM_UNWIND || FUNCTION_GRAPH_TRACER help If you say N here, the resulting kernel will be slightly smaller and faster. However, if neither FRAME_POINTER nor ARM_UNWIND are enabled, -- cgit v0.10.2 From 89c3dedf477da9c8d42d3a63d16875e52f74108b Mon Sep 17 00:00:00 2001 From: Daniel Walker Date: Mon, 22 Nov 2010 12:35:41 -0800 Subject: arm: kconfig: enable SMP for MSM targets This just adds ARCH_MSM_SCORPIONMP to allow SMP selection for MSM. MSM is unique in that it doesn't enable SCU or TWD. Signed-off-by: Daniel Walker diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index db524e7..1a61017 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1205,10 +1205,11 @@ config SMP depends on EXPERIMENTAL depends on GENERIC_CLOCKEVENTS depends on REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP || \ - MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 ||\ - ARCH_S5PV310 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4 + MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || \ + ARCH_S5PV310 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4 || \ + ARCH_MSM_SCORPIONMP select USE_GENERIC_SMP_HELPERS - select HAVE_ARM_SCU + select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP help This enables support for systems with more than one CPU. If you have a system with only one CPU, like most personal computers, say N. If @@ -1291,7 +1292,7 @@ config LOCAL_TIMERS bool "Use local timer interrupts" depends on SMP default y - select HAVE_ARM_TWD + select HAVE_ARM_TWD if !ARCH_MSM_SCORPIONMP help Enable support for local timers on SMP platforms, rather then the legacy IPI broadcast method. Local timers allows the system diff --git a/arch/arm/mach-msm/Kconfig b/arch/arm/mach-msm/Kconfig index dbbcfeb..31e5fd6 100644 --- a/arch/arm/mach-msm/Kconfig +++ b/arch/arm/mach-msm/Kconfig @@ -49,6 +49,8 @@ endchoice config MSM_SOC_REV_A bool +config ARCH_MSM_SCORPIONMP + bool config ARCH_MSM_ARM11 bool -- cgit v0.10.2 From 176bfc44417544724e6df0831a7f576f4a56283d Mon Sep 17 00:00:00 2001 From: Daniel Walker Date: Tue, 7 Sep 2010 13:33:05 -0700 Subject: arm: kconfig: dis-allow hotplug on MSM MSM doesn't support hotplug, so we prevent it from being selected in Kconfig. Signed-off-by: Daniel Walker diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 1a61017..c8fa144 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1284,6 +1284,7 @@ config NR_CPUS config HOTPLUG_CPU bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" depends on SMP && HOTPLUG && EXPERIMENTAL + depends on !ARCH_MSM help Say Y here to experiment with turning CPUs off and on. CPUs can be controlled through /sys/devices/system/cpu. -- cgit v0.10.2 From 84fee97a026ca085f08381054513f9e24689a303 Mon Sep 17 00:00:00 2001 From: Will Deacon Date: Sat, 13 Nov 2010 17:13:56 +0000 Subject: ARM: perf: consolidate common PMU behaviour The functions for mapping PMU events (perf, cache and raw) are common between all PMU types and differ only in the data on which they operate. This patch implements common definitions of these mapping functions and changes the arm_pmu struct to hold pointers to the data which they require. This is in anticipation of separating out the PMU-specific code into separate files. Acked-by: Jamie Iles Acked-by: Jean Pihet Signed-off-by: Will Deacon diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c index 07a5035..c49e170 100644 --- a/arch/arm/kernel/perf_event.c +++ b/arch/arm/kernel/perf_event.c @@ -84,14 +84,17 @@ struct arm_pmu { irqreturn_t (*handle_irq)(int irq_num, void *dev); void (*enable)(struct hw_perf_event *evt, int idx); void (*disable)(struct hw_perf_event *evt, int idx); - int (*event_map)(int evt); - u64 (*raw_event)(u64); int (*get_event_idx)(struct cpu_hw_events *cpuc, struct hw_perf_event *hwc); u32 (*read_counter)(int idx); void (*write_counter)(int idx, u32 val); void (*start)(void); void (*stop)(void); + const unsigned (*cache_map)[PERF_COUNT_HW_CACHE_MAX] + [PERF_COUNT_HW_CACHE_OP_MAX] + [PERF_COUNT_HW_CACHE_RESULT_MAX]; + const unsigned (*event_map)[PERF_COUNT_HW_MAX]; + u32 raw_event_mask; int num_events; u64 max_period; }; @@ -136,10 +139,6 @@ EXPORT_SYMBOL_GPL(perf_num_counters); #define CACHE_OP_UNSUPPORTED 0xFFFF -static unsigned armpmu_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] - [PERF_COUNT_HW_CACHE_OP_MAX] - [PERF_COUNT_HW_CACHE_RESULT_MAX]; - static int armpmu_map_cache_event(u64 config) { @@ -157,7 +156,7 @@ armpmu_map_cache_event(u64 config) if (cache_result >= PERF_COUNT_HW_CACHE_RESULT_MAX) return -EINVAL; - ret = (int)armpmu_perf_cache_map[cache_type][cache_op][cache_result]; + ret = (int)(*armpmu->cache_map)[cache_type][cache_op][cache_result]; if (ret == CACHE_OP_UNSUPPORTED) return -ENOENT; @@ -166,6 +165,19 @@ armpmu_map_cache_event(u64 config) } static int +armpmu_map_event(u64 config) +{ + int mapping = (*armpmu->event_map)[config]; + return mapping == HW_OP_UNSUPPORTED ? -EOPNOTSUPP : mapping; +} + +static int +armpmu_map_raw_event(u64 config) +{ + return (int)(config & armpmu->raw_event_mask); +} + +static int armpmu_event_set_period(struct perf_event *event, struct hw_perf_event *hwc, int idx) @@ -458,11 +470,11 @@ __hw_perf_event_init(struct perf_event *event) /* Decode the generic type into an ARM event identifier. */ if (PERF_TYPE_HARDWARE == event->attr.type) { - mapping = armpmu->event_map(event->attr.config); + mapping = armpmu_map_event(event->attr.config); } else if (PERF_TYPE_HW_CACHE == event->attr.type) { mapping = armpmu_map_cache_event(event->attr.config); } else if (PERF_TYPE_RAW == event->attr.type) { - mapping = armpmu->raw_event(event->attr.config); + mapping = armpmu_map_raw_event(event->attr.config); } else { pr_debug("event type %x not supported\n", event->attr.type); return -EOPNOTSUPP; @@ -1121,30 +1133,6 @@ armv6pmu_stop(void) spin_unlock_irqrestore(&pmu_lock, flags); } -static inline int -armv6pmu_event_map(int config) -{ - int mapping = armv6_perf_map[config]; - if (HW_OP_UNSUPPORTED == mapping) - mapping = -EOPNOTSUPP; - return mapping; -} - -static inline int -armv6mpcore_pmu_event_map(int config) -{ - int mapping = armv6mpcore_perf_map[config]; - if (HW_OP_UNSUPPORTED == mapping) - mapping = -EOPNOTSUPP; - return mapping; -} - -static u64 -armv6pmu_raw_event(u64 config) -{ - return config & 0xff; -} - static int armv6pmu_get_event_idx(struct cpu_hw_events *cpuc, struct hw_perf_event *event) @@ -1240,13 +1228,14 @@ static const struct arm_pmu armv6pmu = { .handle_irq = armv6pmu_handle_irq, .enable = armv6pmu_enable_event, .disable = armv6pmu_disable_event, - .event_map = armv6pmu_event_map, - .raw_event = armv6pmu_raw_event, .read_counter = armv6pmu_read_counter, .write_counter = armv6pmu_write_counter, .get_event_idx = armv6pmu_get_event_idx, .start = armv6pmu_start, .stop = armv6pmu_stop, + .cache_map = &armv6_perf_cache_map, + .event_map = &armv6_perf_map, + .raw_event_mask = 0xFF, .num_events = 3, .max_period = (1LLU << 32) - 1, }; @@ -1263,13 +1252,14 @@ static const struct arm_pmu armv6mpcore_pmu = { .handle_irq = armv6pmu_handle_irq, .enable = armv6pmu_enable_event, .disable = armv6mpcore_pmu_disable_event, - .event_map = armv6mpcore_pmu_event_map, - .raw_event = armv6pmu_raw_event, .read_counter = armv6pmu_read_counter, .write_counter = armv6pmu_write_counter, .get_event_idx = armv6pmu_get_event_idx, .start = armv6pmu_start, .stop = armv6pmu_stop, + .cache_map = &armv6mpcore_perf_cache_map, + .event_map = &armv6mpcore_perf_map, + .raw_event_mask = 0xFF, .num_events = 3, .max_period = (1LLU << 32) - 1, }; @@ -2093,27 +2083,6 @@ static void armv7pmu_stop(void) spin_unlock_irqrestore(&pmu_lock, flags); } -static inline int armv7_a8_pmu_event_map(int config) -{ - int mapping = armv7_a8_perf_map[config]; - if (HW_OP_UNSUPPORTED == mapping) - mapping = -EOPNOTSUPP; - return mapping; -} - -static inline int armv7_a9_pmu_event_map(int config) -{ - int mapping = armv7_a9_perf_map[config]; - if (HW_OP_UNSUPPORTED == mapping) - mapping = -EOPNOTSUPP; - return mapping; -} - -static u64 armv7pmu_raw_event(u64 config) -{ - return config & 0xff; -} - static int armv7pmu_get_event_idx(struct cpu_hw_events *cpuc, struct hw_perf_event *event) { @@ -2144,12 +2113,12 @@ static struct arm_pmu armv7pmu = { .handle_irq = armv7pmu_handle_irq, .enable = armv7pmu_enable_event, .disable = armv7pmu_disable_event, - .raw_event = armv7pmu_raw_event, .read_counter = armv7pmu_read_counter, .write_counter = armv7pmu_write_counter, .get_event_idx = armv7pmu_get_event_idx, .start = armv7pmu_start, .stop = armv7pmu_stop, + .raw_event_mask = 0xFF, .max_period = (1LLU << 32) - 1, }; @@ -2318,21 +2287,6 @@ static const unsigned xscale_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] #define XSCALE_PMU_RESET (CCNT_RESET | PMN_RESET) #define XSCALE_PMU_CNT64 0x008 -static inline int -xscalepmu_event_map(int config) -{ - int mapping = xscale_perf_map[config]; - if (HW_OP_UNSUPPORTED == mapping) - mapping = -EOPNOTSUPP; - return mapping; -} - -static u64 -xscalepmu_raw_event(u64 config) -{ - return config & 0xff; -} - #define XSCALE1_OVERFLOWED_MASK 0x700 #define XSCALE1_CCOUNT_OVERFLOW 0x400 #define XSCALE1_COUNT0_OVERFLOW 0x100 @@ -2598,13 +2552,14 @@ static const struct arm_pmu xscale1pmu = { .handle_irq = xscale1pmu_handle_irq, .enable = xscale1pmu_enable_event, .disable = xscale1pmu_disable_event, - .event_map = xscalepmu_event_map, - .raw_event = xscalepmu_raw_event, .read_counter = xscale1pmu_read_counter, .write_counter = xscale1pmu_write_counter, .get_event_idx = xscale1pmu_get_event_idx, .start = xscale1pmu_start, .stop = xscale1pmu_stop, + .cache_map = &xscale_perf_cache_map, + .event_map = &xscale_perf_map, + .raw_event_mask = 0xFF, .num_events = 3, .max_period = (1LLU << 32) - 1, }; @@ -2953,13 +2908,14 @@ static const struct arm_pmu xscale2pmu = { .handle_irq = xscale2pmu_handle_irq, .enable = xscale2pmu_enable_event, .disable = xscale2pmu_disable_event, - .event_map = xscalepmu_event_map, - .raw_event = xscalepmu_raw_event, .read_counter = xscale2pmu_read_counter, .write_counter = xscale2pmu_write_counter, .get_event_idx = xscale2pmu_get_event_idx, .start = xscale2pmu_start, .stop = xscale2pmu_stop, + .cache_map = &xscale_perf_cache_map, + .event_map = &xscale_perf_map, + .raw_event_mask = 0xFF, .num_events = 5, .max_period = (1LLU << 32) - 1, }; @@ -2978,20 +2934,14 @@ init_hw_perf_events(void) case 0xB560: /* ARM1156 */ case 0xB760: /* ARM1176 */ armpmu = &armv6pmu; - memcpy(armpmu_perf_cache_map, armv6_perf_cache_map, - sizeof(armv6_perf_cache_map)); break; case 0xB020: /* ARM11mpcore */ armpmu = &armv6mpcore_pmu; - memcpy(armpmu_perf_cache_map, - armv6mpcore_perf_cache_map, - sizeof(armv6mpcore_perf_cache_map)); break; case 0xC080: /* Cortex-A8 */ armv7pmu.id = ARM_PERF_PMU_ID_CA8; - memcpy(armpmu_perf_cache_map, armv7_a8_perf_cache_map, - sizeof(armv7_a8_perf_cache_map)); - armv7pmu.event_map = armv7_a8_pmu_event_map; + armv7pmu.cache_map = &armv7_a8_perf_cache_map; + armv7pmu.event_map = &armv7_a8_perf_map; armpmu = &armv7pmu; /* Reset PMNC and read the nb of CNTx counters @@ -3000,9 +2950,8 @@ init_hw_perf_events(void) break; case 0xC090: /* Cortex-A9 */ armv7pmu.id = ARM_PERF_PMU_ID_CA9; - memcpy(armpmu_perf_cache_map, armv7_a9_perf_cache_map, - sizeof(armv7_a9_perf_cache_map)); - armv7pmu.event_map = armv7_a9_pmu_event_map; + armv7pmu.cache_map = &armv7_a9_perf_cache_map; + armv7pmu.event_map = &armv7_a9_perf_map; armpmu = &armv7pmu; /* Reset PMNC and read the nb of CNTx counters @@ -3016,13 +2965,9 @@ init_hw_perf_events(void) switch (part_number) { case 1: armpmu = &xscale1pmu; - memcpy(armpmu_perf_cache_map, xscale_perf_cache_map, - sizeof(xscale_perf_cache_map)); break; case 2: armpmu = &xscale2pmu; - memcpy(armpmu_perf_cache_map, xscale_perf_cache_map, - sizeof(xscale_perf_cache_map)); break; } } -- cgit v0.10.2 From 59a98a1e56edea4d7d9c5f4ce9d50e271a04993c Mon Sep 17 00:00:00 2001 From: Will Deacon Date: Sat, 13 Nov 2010 17:18:36 +0000 Subject: ARM: perf: avoid exposing internal stop function for v6 PMU Unlike other pmu functions, armv6pmu_pmu_stop is not declared static. This patch adds the missing keyword. Acked-by: Jamie Iles Signed-off-by: Will Deacon diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c index c49e170..35319b8 100644 --- a/arch/arm/kernel/perf_event.c +++ b/arch/arm/kernel/perf_event.c @@ -1121,7 +1121,7 @@ armv6pmu_start(void) spin_unlock_irqrestore(&pmu_lock, flags); } -void +static void armv6pmu_stop(void) { unsigned long flags, val; -- cgit v0.10.2 From 3cb314bae2191b432a7e898abf865db880f6d07d Mon Sep 17 00:00:00 2001 From: Will Deacon Date: Sat, 13 Nov 2010 17:37:46 +0000 Subject: ARM: perf: add _init() functions to PMUs In preparation for separating the PMU-specific code, this patch adds self-contained init functions to each PMU, therefore removing any PMU-specific knowledge from the PMU-agnostic init_hw_perf_events function. Acked-by: Jamie Iles Acked-by: Jean Pihet Signed-off-by: Will Deacon diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c index 35319b8..acc4e91 100644 --- a/arch/arm/kernel/perf_event.c +++ b/arch/arm/kernel/perf_event.c @@ -1240,6 +1240,11 @@ static const struct arm_pmu armv6pmu = { .max_period = (1LLU << 32) - 1, }; +const struct arm_pmu *__init armv6pmu_init(void) +{ + return &armv6pmu; +} + /* * ARMv6mpcore is almost identical to single core ARMv6 with the exception * that some of the events have different enumerations and that there is no @@ -1264,6 +1269,11 @@ static const struct arm_pmu armv6mpcore_pmu = { .max_period = (1LLU << 32) - 1, }; +const struct arm_pmu *__init armv6mpcore_pmu_init(void) +{ + return &armv6mpcore_pmu; +} + /* * ARMv7 Cortex-A8 and Cortex-A9 Performance Events handling code. * @@ -2136,6 +2146,25 @@ static u32 __init armv7_reset_read_pmnc(void) return nb_cnt + 1; } +const struct arm_pmu *__init armv7_a8_pmu_init(void) +{ + armv7pmu.id = ARM_PERF_PMU_ID_CA8; + armv7pmu.cache_map = &armv7_a8_perf_cache_map; + armv7pmu.event_map = &armv7_a8_perf_map; + armv7pmu.num_events = armv7_reset_read_pmnc(); + return &armv7pmu; +} + +const struct arm_pmu *__init armv7_a9_pmu_init(void) +{ + armv7pmu.id = ARM_PERF_PMU_ID_CA9; + armv7pmu.cache_map = &armv7_a9_perf_cache_map; + armv7pmu.event_map = &armv7_a9_perf_map; + armv7pmu.num_events = armv7_reset_read_pmnc(); + return &armv7pmu; +} + + /* * ARMv5 [xscale] Performance counter handling code. * @@ -2564,6 +2593,11 @@ static const struct arm_pmu xscale1pmu = { .max_period = (1LLU << 32) - 1, }; +const struct arm_pmu *__init xscale1pmu_init(void) +{ + return &xscale1pmu; +} + #define XSCALE2_OVERFLOWED_MASK 0x01f #define XSCALE2_CCOUNT_OVERFLOW 0x001 #define XSCALE2_COUNT0_OVERFLOW 0x002 @@ -2920,6 +2954,11 @@ static const struct arm_pmu xscale2pmu = { .max_period = (1LLU << 32) - 1, }; +const struct arm_pmu *__init xscale2pmu_init(void) +{ + return &xscale2pmu; +} + static int __init init_hw_perf_events(void) { @@ -2933,30 +2972,16 @@ init_hw_perf_events(void) case 0xB360: /* ARM1136 */ case 0xB560: /* ARM1156 */ case 0xB760: /* ARM1176 */ - armpmu = &armv6pmu; + armpmu = armv6pmu_init(); break; case 0xB020: /* ARM11mpcore */ - armpmu = &armv6mpcore_pmu; + armpmu = armv6mpcore_pmu_init(); break; case 0xC080: /* Cortex-A8 */ - armv7pmu.id = ARM_PERF_PMU_ID_CA8; - armv7pmu.cache_map = &armv7_a8_perf_cache_map; - armv7pmu.event_map = &armv7_a8_perf_map; - armpmu = &armv7pmu; - - /* Reset PMNC and read the nb of CNTx counters - supported */ - armv7pmu.num_events = armv7_reset_read_pmnc(); + armpmu = armv7_a8_pmu_init(); break; case 0xC090: /* Cortex-A9 */ - armv7pmu.id = ARM_PERF_PMU_ID_CA9; - armv7pmu.cache_map = &armv7_a9_perf_cache_map; - armv7pmu.event_map = &armv7_a9_perf_map; - armpmu = &armv7pmu; - - /* Reset PMNC and read the nb of CNTx counters - supported */ - armv7pmu.num_events = armv7_reset_read_pmnc(); + armpmu = armv7_a9_pmu_init(); break; } /* Intel CPUs [xscale]. */ @@ -2964,10 +2989,10 @@ init_hw_perf_events(void) part_number = (cpuid >> 13) & 0x7; switch (part_number) { case 1: - armpmu = &xscale1pmu; + armpmu = xscale1pmu_init(); break; case 2: - armpmu = &xscale2pmu; + armpmu = xscale2pmu_init(); break; } } -- cgit v0.10.2 From 629948310e4270e9b32c37b4a65a8cd5d6ebf38a Mon Sep 17 00:00:00 2001 From: Will Deacon Date: Sat, 13 Nov 2010 18:45:27 +0000 Subject: ARM: perf: encode PMU name in arm_pmu structure Currently, perf uses the PMU ID as an index into a string table to look up the name of a given PMU. This patch encodes the name of a PMU directly into the arm_pmu structure so that PMU-specific code can be factored out into separate files. Acked-by: Jamie Iles Acked-by: Jean Pihet Signed-off-by: Will Deacon diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c index acc4e91..ac4e9a1 100644 --- a/arch/arm/kernel/perf_event.c +++ b/arch/arm/kernel/perf_event.c @@ -69,18 +69,9 @@ struct cpu_hw_events { }; DEFINE_PER_CPU(struct cpu_hw_events, cpu_hw_events); -/* PMU names. */ -static const char *arm_pmu_names[] = { - [ARM_PERF_PMU_ID_XSCALE1] = "xscale1", - [ARM_PERF_PMU_ID_XSCALE2] = "xscale2", - [ARM_PERF_PMU_ID_V6] = "v6", - [ARM_PERF_PMU_ID_V6MP] = "v6mpcore", - [ARM_PERF_PMU_ID_CA8] = "ARMv7 Cortex-A8", - [ARM_PERF_PMU_ID_CA9] = "ARMv7 Cortex-A9", -}; - struct arm_pmu { enum arm_perf_pmu_ids id; + const char *name; irqreturn_t (*handle_irq)(int irq_num, void *dev); void (*enable)(struct hw_perf_event *evt, int idx); void (*disable)(struct hw_perf_event *evt, int idx); @@ -1225,6 +1216,7 @@ armv6mpcore_pmu_disable_event(struct hw_perf_event *hwc, static const struct arm_pmu armv6pmu = { .id = ARM_PERF_PMU_ID_V6, + .name = "v6", .handle_irq = armv6pmu_handle_irq, .enable = armv6pmu_enable_event, .disable = armv6pmu_disable_event, @@ -1254,6 +1246,7 @@ const struct arm_pmu *__init armv6pmu_init(void) */ static const struct arm_pmu armv6mpcore_pmu = { .id = ARM_PERF_PMU_ID_V6MP, + .name = "v6mpcore", .handle_irq = armv6pmu_handle_irq, .enable = armv6pmu_enable_event, .disable = armv6mpcore_pmu_disable_event, @@ -2149,6 +2142,7 @@ static u32 __init armv7_reset_read_pmnc(void) const struct arm_pmu *__init armv7_a8_pmu_init(void) { armv7pmu.id = ARM_PERF_PMU_ID_CA8; + armv7pmu.name = "ARMv7 Cortex-A8"; armv7pmu.cache_map = &armv7_a8_perf_cache_map; armv7pmu.event_map = &armv7_a8_perf_map; armv7pmu.num_events = armv7_reset_read_pmnc(); @@ -2158,6 +2152,7 @@ const struct arm_pmu *__init armv7_a8_pmu_init(void) const struct arm_pmu *__init armv7_a9_pmu_init(void) { armv7pmu.id = ARM_PERF_PMU_ID_CA9; + armv7pmu.name = "ARMv7 Cortex-A9"; armv7pmu.cache_map = &armv7_a9_perf_cache_map; armv7pmu.event_map = &armv7_a9_perf_map; armv7pmu.num_events = armv7_reset_read_pmnc(); @@ -2578,6 +2573,7 @@ xscale1pmu_write_counter(int counter, u32 val) static const struct arm_pmu xscale1pmu = { .id = ARM_PERF_PMU_ID_XSCALE1, + .name = "xscale1", .handle_irq = xscale1pmu_handle_irq, .enable = xscale1pmu_enable_event, .disable = xscale1pmu_disable_event, @@ -2939,6 +2935,7 @@ xscale2pmu_write_counter(int counter, u32 val) static const struct arm_pmu xscale2pmu = { .id = ARM_PERF_PMU_ID_XSCALE2, + .name = "xscale2", .handle_irq = xscale2pmu_handle_irq, .enable = xscale2pmu_enable_event, .disable = xscale2pmu_disable_event, @@ -2999,7 +2996,7 @@ init_hw_perf_events(void) if (armpmu) { pr_info("enabled with %s PMU driver, %d counters available\n", - arm_pmu_names[armpmu->id], armpmu->num_events); + armpmu->name, armpmu->num_events); } else { pr_info("no hardware support available\n"); } -- cgit v0.10.2 From 43eab87828fee65f89f4088736b2b7a187390a2f Mon Sep 17 00:00:00 2001 From: Will Deacon Date: Sat, 13 Nov 2010 19:04:32 +0000 Subject: ARM: perf: separate PMU backends into multiple files The ARM perf_event.c file contains all PMU backends and, as new PMUs are introduced, will continue to grow. This patch follows the example of x86 and splits the PMU implementations into separate files which are then #included back into the main file. Compile-time guards are added to each PMU file to avoid compiling in code that is not relevant for the version of the architecture which we are targetting. Acked-by: Jean Pihet Signed-off-by: Will Deacon diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c index ac4e9a1..421a4bb 100644 --- a/arch/arm/kernel/perf_event.c +++ b/arch/arm/kernel/perf_event.c @@ -4,9 +4,7 @@ * ARM performance counter support. * * Copyright (C) 2009 picoChip Designs, Ltd., Jamie Iles - * - * ARMv7 support: Jean Pihet - * 2010 (c) MontaVista Software, LLC. + * Copyright (C) 2010 ARM Ltd., Will Deacon * * This code is based on the sparc64 perf event code, which is in turn based * on the x86 code. Callchain code is based on the ARM OProfile backtrace @@ -606,2355 +604,10 @@ static struct pmu pmu = { .read = armpmu_read, }; -/* - * ARMv6 Performance counter handling code. - * - * ARMv6 has 2 configurable performance counters and a single cycle counter. - * They all share a single reset bit but can be written to zero so we can use - * that for a reset. - * - * The counters can't be individually enabled or disabled so when we remove - * one event and replace it with another we could get spurious counts from the - * wrong event. However, we can take advantage of the fact that the - * performance counters can export events to the event bus, and the event bus - * itself can be monitored. This requires that we *don't* export the events to - * the event bus. The procedure for disabling a configurable counter is: - * - change the counter to count the ETMEXTOUT[0] signal (0x20). This - * effectively stops the counter from counting. - * - disable the counter's interrupt generation (each counter has it's - * own interrupt enable bit). - * Once stopped, the counter value can be written as 0 to reset. - * - * To enable a counter: - * - enable the counter's interrupt generation. - * - set the new event type. - * - * Note: the dedicated cycle counter only counts cycles and can't be - * enabled/disabled independently of the others. When we want to disable the - * cycle counter, we have to just disable the interrupt reporting and start - * ignoring that counter. When re-enabling, we have to reset the value and - * enable the interrupt. - */ - -enum armv6_perf_types { - ARMV6_PERFCTR_ICACHE_MISS = 0x0, - ARMV6_PERFCTR_IBUF_STALL = 0x1, - ARMV6_PERFCTR_DDEP_STALL = 0x2, - ARMV6_PERFCTR_ITLB_MISS = 0x3, - ARMV6_PERFCTR_DTLB_MISS = 0x4, - ARMV6_PERFCTR_BR_EXEC = 0x5, - ARMV6_PERFCTR_BR_MISPREDICT = 0x6, - ARMV6_PERFCTR_INSTR_EXEC = 0x7, - ARMV6_PERFCTR_DCACHE_HIT = 0x9, - ARMV6_PERFCTR_DCACHE_ACCESS = 0xA, - ARMV6_PERFCTR_DCACHE_MISS = 0xB, - ARMV6_PERFCTR_DCACHE_WBACK = 0xC, - ARMV6_PERFCTR_SW_PC_CHANGE = 0xD, - ARMV6_PERFCTR_MAIN_TLB_MISS = 0xF, - ARMV6_PERFCTR_EXPL_D_ACCESS = 0x10, - ARMV6_PERFCTR_LSU_FULL_STALL = 0x11, - ARMV6_PERFCTR_WBUF_DRAINED = 0x12, - ARMV6_PERFCTR_CPU_CYCLES = 0xFF, - ARMV6_PERFCTR_NOP = 0x20, -}; - -enum armv6_counters { - ARMV6_CYCLE_COUNTER = 1, - ARMV6_COUNTER0, - ARMV6_COUNTER1, -}; - -/* - * The hardware events that we support. We do support cache operations but - * we have harvard caches and no way to combine instruction and data - * accesses/misses in hardware. - */ -static const unsigned armv6_perf_map[PERF_COUNT_HW_MAX] = { - [PERF_COUNT_HW_CPU_CYCLES] = ARMV6_PERFCTR_CPU_CYCLES, - [PERF_COUNT_HW_INSTRUCTIONS] = ARMV6_PERFCTR_INSTR_EXEC, - [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED, - [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED, - [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV6_PERFCTR_BR_EXEC, - [PERF_COUNT_HW_BRANCH_MISSES] = ARMV6_PERFCTR_BR_MISPREDICT, - [PERF_COUNT_HW_BUS_CYCLES] = HW_OP_UNSUPPORTED, -}; - -static const unsigned armv6_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] - [PERF_COUNT_HW_CACHE_OP_MAX] - [PERF_COUNT_HW_CACHE_RESULT_MAX] = { - [C(L1D)] = { - /* - * The performance counters don't differentiate between read - * and write accesses/misses so this isn't strictly correct, - * but it's the best we can do. Writes and reads get - * combined. - */ - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = ARMV6_PERFCTR_DCACHE_ACCESS, - [C(RESULT_MISS)] = ARMV6_PERFCTR_DCACHE_MISS, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = ARMV6_PERFCTR_DCACHE_ACCESS, - [C(RESULT_MISS)] = ARMV6_PERFCTR_DCACHE_MISS, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(L1I)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV6_PERFCTR_ICACHE_MISS, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV6_PERFCTR_ICACHE_MISS, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(LL)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(DTLB)] = { - /* - * The ARM performance counters can count micro DTLB misses, - * micro ITLB misses and main TLB misses. There isn't an event - * for TLB misses, so use the micro misses here and if users - * want the main TLB misses they can use a raw counter. - */ - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV6_PERFCTR_DTLB_MISS, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV6_PERFCTR_DTLB_MISS, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(ITLB)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV6_PERFCTR_ITLB_MISS, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV6_PERFCTR_ITLB_MISS, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(BPU)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, -}; - -enum armv6mpcore_perf_types { - ARMV6MPCORE_PERFCTR_ICACHE_MISS = 0x0, - ARMV6MPCORE_PERFCTR_IBUF_STALL = 0x1, - ARMV6MPCORE_PERFCTR_DDEP_STALL = 0x2, - ARMV6MPCORE_PERFCTR_ITLB_MISS = 0x3, - ARMV6MPCORE_PERFCTR_DTLB_MISS = 0x4, - ARMV6MPCORE_PERFCTR_BR_EXEC = 0x5, - ARMV6MPCORE_PERFCTR_BR_NOTPREDICT = 0x6, - ARMV6MPCORE_PERFCTR_BR_MISPREDICT = 0x7, - ARMV6MPCORE_PERFCTR_INSTR_EXEC = 0x8, - ARMV6MPCORE_PERFCTR_DCACHE_RDACCESS = 0xA, - ARMV6MPCORE_PERFCTR_DCACHE_RDMISS = 0xB, - ARMV6MPCORE_PERFCTR_DCACHE_WRACCESS = 0xC, - ARMV6MPCORE_PERFCTR_DCACHE_WRMISS = 0xD, - ARMV6MPCORE_PERFCTR_DCACHE_EVICTION = 0xE, - ARMV6MPCORE_PERFCTR_SW_PC_CHANGE = 0xF, - ARMV6MPCORE_PERFCTR_MAIN_TLB_MISS = 0x10, - ARMV6MPCORE_PERFCTR_EXPL_MEM_ACCESS = 0x11, - ARMV6MPCORE_PERFCTR_LSU_FULL_STALL = 0x12, - ARMV6MPCORE_PERFCTR_WBUF_DRAINED = 0x13, - ARMV6MPCORE_PERFCTR_CPU_CYCLES = 0xFF, -}; - -/* - * The hardware events that we support. We do support cache operations but - * we have harvard caches and no way to combine instruction and data - * accesses/misses in hardware. - */ -static const unsigned armv6mpcore_perf_map[PERF_COUNT_HW_MAX] = { - [PERF_COUNT_HW_CPU_CYCLES] = ARMV6MPCORE_PERFCTR_CPU_CYCLES, - [PERF_COUNT_HW_INSTRUCTIONS] = ARMV6MPCORE_PERFCTR_INSTR_EXEC, - [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED, - [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED, - [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV6MPCORE_PERFCTR_BR_EXEC, - [PERF_COUNT_HW_BRANCH_MISSES] = ARMV6MPCORE_PERFCTR_BR_MISPREDICT, - [PERF_COUNT_HW_BUS_CYCLES] = HW_OP_UNSUPPORTED, -}; - -static const unsigned armv6mpcore_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] - [PERF_COUNT_HW_CACHE_OP_MAX] - [PERF_COUNT_HW_CACHE_RESULT_MAX] = { - [C(L1D)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = - ARMV6MPCORE_PERFCTR_DCACHE_RDACCESS, - [C(RESULT_MISS)] = - ARMV6MPCORE_PERFCTR_DCACHE_RDMISS, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = - ARMV6MPCORE_PERFCTR_DCACHE_WRACCESS, - [C(RESULT_MISS)] = - ARMV6MPCORE_PERFCTR_DCACHE_WRMISS, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(L1I)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_ICACHE_MISS, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_ICACHE_MISS, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(LL)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(DTLB)] = { - /* - * The ARM performance counters can count micro DTLB misses, - * micro ITLB misses and main TLB misses. There isn't an event - * for TLB misses, so use the micro misses here and if users - * want the main TLB misses they can use a raw counter. - */ - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_DTLB_MISS, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_DTLB_MISS, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(ITLB)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_ITLB_MISS, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_ITLB_MISS, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(BPU)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, -}; - -static inline unsigned long -armv6_pmcr_read(void) -{ - u32 val; - asm volatile("mrc p15, 0, %0, c15, c12, 0" : "=r"(val)); - return val; -} - -static inline void -armv6_pmcr_write(unsigned long val) -{ - asm volatile("mcr p15, 0, %0, c15, c12, 0" : : "r"(val)); -} - -#define ARMV6_PMCR_ENABLE (1 << 0) -#define ARMV6_PMCR_CTR01_RESET (1 << 1) -#define ARMV6_PMCR_CCOUNT_RESET (1 << 2) -#define ARMV6_PMCR_CCOUNT_DIV (1 << 3) -#define ARMV6_PMCR_COUNT0_IEN (1 << 4) -#define ARMV6_PMCR_COUNT1_IEN (1 << 5) -#define ARMV6_PMCR_CCOUNT_IEN (1 << 6) -#define ARMV6_PMCR_COUNT0_OVERFLOW (1 << 8) -#define ARMV6_PMCR_COUNT1_OVERFLOW (1 << 9) -#define ARMV6_PMCR_CCOUNT_OVERFLOW (1 << 10) -#define ARMV6_PMCR_EVT_COUNT0_SHIFT 20 -#define ARMV6_PMCR_EVT_COUNT0_MASK (0xFF << ARMV6_PMCR_EVT_COUNT0_SHIFT) -#define ARMV6_PMCR_EVT_COUNT1_SHIFT 12 -#define ARMV6_PMCR_EVT_COUNT1_MASK (0xFF << ARMV6_PMCR_EVT_COUNT1_SHIFT) - -#define ARMV6_PMCR_OVERFLOWED_MASK \ - (ARMV6_PMCR_COUNT0_OVERFLOW | ARMV6_PMCR_COUNT1_OVERFLOW | \ - ARMV6_PMCR_CCOUNT_OVERFLOW) - -static inline int -armv6_pmcr_has_overflowed(unsigned long pmcr) -{ - return (pmcr & ARMV6_PMCR_OVERFLOWED_MASK); -} - -static inline int -armv6_pmcr_counter_has_overflowed(unsigned long pmcr, - enum armv6_counters counter) -{ - int ret = 0; - - if (ARMV6_CYCLE_COUNTER == counter) - ret = pmcr & ARMV6_PMCR_CCOUNT_OVERFLOW; - else if (ARMV6_COUNTER0 == counter) - ret = pmcr & ARMV6_PMCR_COUNT0_OVERFLOW; - else if (ARMV6_COUNTER1 == counter) - ret = pmcr & ARMV6_PMCR_COUNT1_OVERFLOW; - else - WARN_ONCE(1, "invalid counter number (%d)\n", counter); - - return ret; -} - -static inline u32 -armv6pmu_read_counter(int counter) -{ - unsigned long value = 0; - - if (ARMV6_CYCLE_COUNTER == counter) - asm volatile("mrc p15, 0, %0, c15, c12, 1" : "=r"(value)); - else if (ARMV6_COUNTER0 == counter) - asm volatile("mrc p15, 0, %0, c15, c12, 2" : "=r"(value)); - else if (ARMV6_COUNTER1 == counter) - asm volatile("mrc p15, 0, %0, c15, c12, 3" : "=r"(value)); - else - WARN_ONCE(1, "invalid counter number (%d)\n", counter); - - return value; -} - -static inline void -armv6pmu_write_counter(int counter, - u32 value) -{ - if (ARMV6_CYCLE_COUNTER == counter) - asm volatile("mcr p15, 0, %0, c15, c12, 1" : : "r"(value)); - else if (ARMV6_COUNTER0 == counter) - asm volatile("mcr p15, 0, %0, c15, c12, 2" : : "r"(value)); - else if (ARMV6_COUNTER1 == counter) - asm volatile("mcr p15, 0, %0, c15, c12, 3" : : "r"(value)); - else - WARN_ONCE(1, "invalid counter number (%d)\n", counter); -} - -void -armv6pmu_enable_event(struct hw_perf_event *hwc, - int idx) -{ - unsigned long val, mask, evt, flags; - - if (ARMV6_CYCLE_COUNTER == idx) { - mask = 0; - evt = ARMV6_PMCR_CCOUNT_IEN; - } else if (ARMV6_COUNTER0 == idx) { - mask = ARMV6_PMCR_EVT_COUNT0_MASK; - evt = (hwc->config_base << ARMV6_PMCR_EVT_COUNT0_SHIFT) | - ARMV6_PMCR_COUNT0_IEN; - } else if (ARMV6_COUNTER1 == idx) { - mask = ARMV6_PMCR_EVT_COUNT1_MASK; - evt = (hwc->config_base << ARMV6_PMCR_EVT_COUNT1_SHIFT) | - ARMV6_PMCR_COUNT1_IEN; - } else { - WARN_ONCE(1, "invalid counter number (%d)\n", idx); - return; - } - - /* - * Mask out the current event and set the counter to count the event - * that we're interested in. - */ - spin_lock_irqsave(&pmu_lock, flags); - val = armv6_pmcr_read(); - val &= ~mask; - val |= evt; - armv6_pmcr_write(val); - spin_unlock_irqrestore(&pmu_lock, flags); -} - -static irqreturn_t -armv6pmu_handle_irq(int irq_num, - void *dev) -{ - unsigned long pmcr = armv6_pmcr_read(); - struct perf_sample_data data; - struct cpu_hw_events *cpuc; - struct pt_regs *regs; - int idx; - - if (!armv6_pmcr_has_overflowed(pmcr)) - return IRQ_NONE; - - regs = get_irq_regs(); - - /* - * The interrupts are cleared by writing the overflow flags back to - * the control register. All of the other bits don't have any effect - * if they are rewritten, so write the whole value back. - */ - armv6_pmcr_write(pmcr); - - perf_sample_data_init(&data, 0); - - cpuc = &__get_cpu_var(cpu_hw_events); - for (idx = 0; idx <= armpmu->num_events; ++idx) { - struct perf_event *event = cpuc->events[idx]; - struct hw_perf_event *hwc; - - if (!test_bit(idx, cpuc->active_mask)) - continue; - - /* - * We have a single interrupt for all counters. Check that - * each counter has overflowed before we process it. - */ - if (!armv6_pmcr_counter_has_overflowed(pmcr, idx)) - continue; - - hwc = &event->hw; - armpmu_event_update(event, hwc, idx); - data.period = event->hw.last_period; - if (!armpmu_event_set_period(event, hwc, idx)) - continue; - - if (perf_event_overflow(event, 0, &data, regs)) - armpmu->disable(hwc, idx); - } - - /* - * Handle the pending perf events. - * - * Note: this call *must* be run with interrupts disabled. For - * platforms that can have the PMU interrupts raised as an NMI, this - * will not work. - */ - irq_work_run(); - - return IRQ_HANDLED; -} - -static void -armv6pmu_start(void) -{ - unsigned long flags, val; - - spin_lock_irqsave(&pmu_lock, flags); - val = armv6_pmcr_read(); - val |= ARMV6_PMCR_ENABLE; - armv6_pmcr_write(val); - spin_unlock_irqrestore(&pmu_lock, flags); -} - -static void -armv6pmu_stop(void) -{ - unsigned long flags, val; - - spin_lock_irqsave(&pmu_lock, flags); - val = armv6_pmcr_read(); - val &= ~ARMV6_PMCR_ENABLE; - armv6_pmcr_write(val); - spin_unlock_irqrestore(&pmu_lock, flags); -} - -static int -armv6pmu_get_event_idx(struct cpu_hw_events *cpuc, - struct hw_perf_event *event) -{ - /* Always place a cycle counter into the cycle counter. */ - if (ARMV6_PERFCTR_CPU_CYCLES == event->config_base) { - if (test_and_set_bit(ARMV6_CYCLE_COUNTER, cpuc->used_mask)) - return -EAGAIN; - - return ARMV6_CYCLE_COUNTER; - } else { - /* - * For anything other than a cycle counter, try and use - * counter0 and counter1. - */ - if (!test_and_set_bit(ARMV6_COUNTER1, cpuc->used_mask)) { - return ARMV6_COUNTER1; - } - - if (!test_and_set_bit(ARMV6_COUNTER0, cpuc->used_mask)) { - return ARMV6_COUNTER0; - } - - /* The counters are all in use. */ - return -EAGAIN; - } -} - -static void -armv6pmu_disable_event(struct hw_perf_event *hwc, - int idx) -{ - unsigned long val, mask, evt, flags; - - if (ARMV6_CYCLE_COUNTER == idx) { - mask = ARMV6_PMCR_CCOUNT_IEN; - evt = 0; - } else if (ARMV6_COUNTER0 == idx) { - mask = ARMV6_PMCR_COUNT0_IEN | ARMV6_PMCR_EVT_COUNT0_MASK; - evt = ARMV6_PERFCTR_NOP << ARMV6_PMCR_EVT_COUNT0_SHIFT; - } else if (ARMV6_COUNTER1 == idx) { - mask = ARMV6_PMCR_COUNT1_IEN | ARMV6_PMCR_EVT_COUNT1_MASK; - evt = ARMV6_PERFCTR_NOP << ARMV6_PMCR_EVT_COUNT1_SHIFT; - } else { - WARN_ONCE(1, "invalid counter number (%d)\n", idx); - return; - } - - /* - * Mask out the current event and set the counter to count the number - * of ETM bus signal assertion cycles. The external reporting should - * be disabled and so this should never increment. - */ - spin_lock_irqsave(&pmu_lock, flags); - val = armv6_pmcr_read(); - val &= ~mask; - val |= evt; - armv6_pmcr_write(val); - spin_unlock_irqrestore(&pmu_lock, flags); -} - -static void -armv6mpcore_pmu_disable_event(struct hw_perf_event *hwc, - int idx) -{ - unsigned long val, mask, flags, evt = 0; - - if (ARMV6_CYCLE_COUNTER == idx) { - mask = ARMV6_PMCR_CCOUNT_IEN; - } else if (ARMV6_COUNTER0 == idx) { - mask = ARMV6_PMCR_COUNT0_IEN; - } else if (ARMV6_COUNTER1 == idx) { - mask = ARMV6_PMCR_COUNT1_IEN; - } else { - WARN_ONCE(1, "invalid counter number (%d)\n", idx); - return; - } - - /* - * Unlike UP ARMv6, we don't have a way of stopping the counters. We - * simply disable the interrupt reporting. - */ - spin_lock_irqsave(&pmu_lock, flags); - val = armv6_pmcr_read(); - val &= ~mask; - val |= evt; - armv6_pmcr_write(val); - spin_unlock_irqrestore(&pmu_lock, flags); -} - -static const struct arm_pmu armv6pmu = { - .id = ARM_PERF_PMU_ID_V6, - .name = "v6", - .handle_irq = armv6pmu_handle_irq, - .enable = armv6pmu_enable_event, - .disable = armv6pmu_disable_event, - .read_counter = armv6pmu_read_counter, - .write_counter = armv6pmu_write_counter, - .get_event_idx = armv6pmu_get_event_idx, - .start = armv6pmu_start, - .stop = armv6pmu_stop, - .cache_map = &armv6_perf_cache_map, - .event_map = &armv6_perf_map, - .raw_event_mask = 0xFF, - .num_events = 3, - .max_period = (1LLU << 32) - 1, -}; - -const struct arm_pmu *__init armv6pmu_init(void) -{ - return &armv6pmu; -} - -/* - * ARMv6mpcore is almost identical to single core ARMv6 with the exception - * that some of the events have different enumerations and that there is no - * *hack* to stop the programmable counters. To stop the counters we simply - * disable the interrupt reporting and update the event. When unthrottling we - * reset the period and enable the interrupt reporting. - */ -static const struct arm_pmu armv6mpcore_pmu = { - .id = ARM_PERF_PMU_ID_V6MP, - .name = "v6mpcore", - .handle_irq = armv6pmu_handle_irq, - .enable = armv6pmu_enable_event, - .disable = armv6mpcore_pmu_disable_event, - .read_counter = armv6pmu_read_counter, - .write_counter = armv6pmu_write_counter, - .get_event_idx = armv6pmu_get_event_idx, - .start = armv6pmu_start, - .stop = armv6pmu_stop, - .cache_map = &armv6mpcore_perf_cache_map, - .event_map = &armv6mpcore_perf_map, - .raw_event_mask = 0xFF, - .num_events = 3, - .max_period = (1LLU << 32) - 1, -}; - -const struct arm_pmu *__init armv6mpcore_pmu_init(void) -{ - return &armv6mpcore_pmu; -} - -/* - * ARMv7 Cortex-A8 and Cortex-A9 Performance Events handling code. - * - * Copied from ARMv6 code, with the low level code inspired - * by the ARMv7 Oprofile code. - * - * Cortex-A8 has up to 4 configurable performance counters and - * a single cycle counter. - * Cortex-A9 has up to 31 configurable performance counters and - * a single cycle counter. - * - * All counters can be enabled/disabled and IRQ masked separately. The cycle - * counter and all 4 performance counters together can be reset separately. - */ - -/* Common ARMv7 event types */ -enum armv7_perf_types { - ARMV7_PERFCTR_PMNC_SW_INCR = 0x00, - ARMV7_PERFCTR_IFETCH_MISS = 0x01, - ARMV7_PERFCTR_ITLB_MISS = 0x02, - ARMV7_PERFCTR_DCACHE_REFILL = 0x03, - ARMV7_PERFCTR_DCACHE_ACCESS = 0x04, - ARMV7_PERFCTR_DTLB_REFILL = 0x05, - ARMV7_PERFCTR_DREAD = 0x06, - ARMV7_PERFCTR_DWRITE = 0x07, - - ARMV7_PERFCTR_EXC_TAKEN = 0x09, - ARMV7_PERFCTR_EXC_EXECUTED = 0x0A, - ARMV7_PERFCTR_CID_WRITE = 0x0B, - /* ARMV7_PERFCTR_PC_WRITE is equivalent to HW_BRANCH_INSTRUCTIONS. - * It counts: - * - all branch instructions, - * - instructions that explicitly write the PC, - * - exception generating instructions. - */ - ARMV7_PERFCTR_PC_WRITE = 0x0C, - ARMV7_PERFCTR_PC_IMM_BRANCH = 0x0D, - ARMV7_PERFCTR_UNALIGNED_ACCESS = 0x0F, - ARMV7_PERFCTR_PC_BRANCH_MIS_PRED = 0x10, - ARMV7_PERFCTR_CLOCK_CYCLES = 0x11, - - ARMV7_PERFCTR_PC_BRANCH_MIS_USED = 0x12, - - ARMV7_PERFCTR_CPU_CYCLES = 0xFF -}; - -/* ARMv7 Cortex-A8 specific event types */ -enum armv7_a8_perf_types { - ARMV7_PERFCTR_INSTR_EXECUTED = 0x08, - - ARMV7_PERFCTR_PC_PROC_RETURN = 0x0E, - - ARMV7_PERFCTR_WRITE_BUFFER_FULL = 0x40, - ARMV7_PERFCTR_L2_STORE_MERGED = 0x41, - ARMV7_PERFCTR_L2_STORE_BUFF = 0x42, - ARMV7_PERFCTR_L2_ACCESS = 0x43, - ARMV7_PERFCTR_L2_CACH_MISS = 0x44, - ARMV7_PERFCTR_AXI_READ_CYCLES = 0x45, - ARMV7_PERFCTR_AXI_WRITE_CYCLES = 0x46, - ARMV7_PERFCTR_MEMORY_REPLAY = 0x47, - ARMV7_PERFCTR_UNALIGNED_ACCESS_REPLAY = 0x48, - ARMV7_PERFCTR_L1_DATA_MISS = 0x49, - ARMV7_PERFCTR_L1_INST_MISS = 0x4A, - ARMV7_PERFCTR_L1_DATA_COLORING = 0x4B, - ARMV7_PERFCTR_L1_NEON_DATA = 0x4C, - ARMV7_PERFCTR_L1_NEON_CACH_DATA = 0x4D, - ARMV7_PERFCTR_L2_NEON = 0x4E, - ARMV7_PERFCTR_L2_NEON_HIT = 0x4F, - ARMV7_PERFCTR_L1_INST = 0x50, - ARMV7_PERFCTR_PC_RETURN_MIS_PRED = 0x51, - ARMV7_PERFCTR_PC_BRANCH_FAILED = 0x52, - ARMV7_PERFCTR_PC_BRANCH_TAKEN = 0x53, - ARMV7_PERFCTR_PC_BRANCH_EXECUTED = 0x54, - ARMV7_PERFCTR_OP_EXECUTED = 0x55, - ARMV7_PERFCTR_CYCLES_INST_STALL = 0x56, - ARMV7_PERFCTR_CYCLES_INST = 0x57, - ARMV7_PERFCTR_CYCLES_NEON_DATA_STALL = 0x58, - ARMV7_PERFCTR_CYCLES_NEON_INST_STALL = 0x59, - ARMV7_PERFCTR_NEON_CYCLES = 0x5A, - - ARMV7_PERFCTR_PMU0_EVENTS = 0x70, - ARMV7_PERFCTR_PMU1_EVENTS = 0x71, - ARMV7_PERFCTR_PMU_EVENTS = 0x72, -}; - -/* ARMv7 Cortex-A9 specific event types */ -enum armv7_a9_perf_types { - ARMV7_PERFCTR_JAVA_HW_BYTECODE_EXEC = 0x40, - ARMV7_PERFCTR_JAVA_SW_BYTECODE_EXEC = 0x41, - ARMV7_PERFCTR_JAZELLE_BRANCH_EXEC = 0x42, - - ARMV7_PERFCTR_COHERENT_LINE_MISS = 0x50, - ARMV7_PERFCTR_COHERENT_LINE_HIT = 0x51, - - ARMV7_PERFCTR_ICACHE_DEP_STALL_CYCLES = 0x60, - ARMV7_PERFCTR_DCACHE_DEP_STALL_CYCLES = 0x61, - ARMV7_PERFCTR_TLB_MISS_DEP_STALL_CYCLES = 0x62, - ARMV7_PERFCTR_STREX_EXECUTED_PASSED = 0x63, - ARMV7_PERFCTR_STREX_EXECUTED_FAILED = 0x64, - ARMV7_PERFCTR_DATA_EVICTION = 0x65, - ARMV7_PERFCTR_ISSUE_STAGE_NO_INST = 0x66, - ARMV7_PERFCTR_ISSUE_STAGE_EMPTY = 0x67, - ARMV7_PERFCTR_INST_OUT_OF_RENAME_STAGE = 0x68, - - ARMV7_PERFCTR_PREDICTABLE_FUNCT_RETURNS = 0x6E, - - ARMV7_PERFCTR_MAIN_UNIT_EXECUTED_INST = 0x70, - ARMV7_PERFCTR_SECOND_UNIT_EXECUTED_INST = 0x71, - ARMV7_PERFCTR_LD_ST_UNIT_EXECUTED_INST = 0x72, - ARMV7_PERFCTR_FP_EXECUTED_INST = 0x73, - ARMV7_PERFCTR_NEON_EXECUTED_INST = 0x74, - - ARMV7_PERFCTR_PLD_FULL_DEP_STALL_CYCLES = 0x80, - ARMV7_PERFCTR_DATA_WR_DEP_STALL_CYCLES = 0x81, - ARMV7_PERFCTR_ITLB_MISS_DEP_STALL_CYCLES = 0x82, - ARMV7_PERFCTR_DTLB_MISS_DEP_STALL_CYCLES = 0x83, - ARMV7_PERFCTR_MICRO_ITLB_MISS_DEP_STALL_CYCLES = 0x84, - ARMV7_PERFCTR_MICRO_DTLB_MISS_DEP_STALL_CYCLES = 0x85, - ARMV7_PERFCTR_DMB_DEP_STALL_CYCLES = 0x86, - - ARMV7_PERFCTR_INTGR_CLK_ENABLED_CYCLES = 0x8A, - ARMV7_PERFCTR_DATA_ENGINE_CLK_EN_CYCLES = 0x8B, - - ARMV7_PERFCTR_ISB_INST = 0x90, - ARMV7_PERFCTR_DSB_INST = 0x91, - ARMV7_PERFCTR_DMB_INST = 0x92, - ARMV7_PERFCTR_EXT_INTERRUPTS = 0x93, - - ARMV7_PERFCTR_PLE_CACHE_LINE_RQST_COMPLETED = 0xA0, - ARMV7_PERFCTR_PLE_CACHE_LINE_RQST_SKIPPED = 0xA1, - ARMV7_PERFCTR_PLE_FIFO_FLUSH = 0xA2, - ARMV7_PERFCTR_PLE_RQST_COMPLETED = 0xA3, - ARMV7_PERFCTR_PLE_FIFO_OVERFLOW = 0xA4, - ARMV7_PERFCTR_PLE_RQST_PROG = 0xA5 -}; - -/* - * Cortex-A8 HW events mapping - * - * The hardware events that we support. We do support cache operations but - * we have harvard caches and no way to combine instruction and data - * accesses/misses in hardware. - */ -static const unsigned armv7_a8_perf_map[PERF_COUNT_HW_MAX] = { - [PERF_COUNT_HW_CPU_CYCLES] = ARMV7_PERFCTR_CPU_CYCLES, - [PERF_COUNT_HW_INSTRUCTIONS] = ARMV7_PERFCTR_INSTR_EXECUTED, - [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED, - [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED, - [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV7_PERFCTR_PC_WRITE, - [PERF_COUNT_HW_BRANCH_MISSES] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, - [PERF_COUNT_HW_BUS_CYCLES] = ARMV7_PERFCTR_CLOCK_CYCLES, -}; - -static const unsigned armv7_a8_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] - [PERF_COUNT_HW_CACHE_OP_MAX] - [PERF_COUNT_HW_CACHE_RESULT_MAX] = { - [C(L1D)] = { - /* - * The performance counters don't differentiate between read - * and write accesses/misses so this isn't strictly correct, - * but it's the best we can do. Writes and reads get - * combined. - */ - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS, - [C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS, - [C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(L1I)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_INST, - [C(RESULT_MISS)] = ARMV7_PERFCTR_L1_INST_MISS, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_INST, - [C(RESULT_MISS)] = ARMV7_PERFCTR_L1_INST_MISS, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(LL)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L2_ACCESS, - [C(RESULT_MISS)] = ARMV7_PERFCTR_L2_CACH_MISS, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L2_ACCESS, - [C(RESULT_MISS)] = ARMV7_PERFCTR_L2_CACH_MISS, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(DTLB)] = { - /* - * Only ITLB misses and DTLB refills are supported. - * If users want the DTLB refills misses a raw counter - * must be used. - */ - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(ITLB)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(BPU)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE, - [C(RESULT_MISS)] - = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE, - [C(RESULT_MISS)] - = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, -}; - -/* - * Cortex-A9 HW events mapping - */ -static const unsigned armv7_a9_perf_map[PERF_COUNT_HW_MAX] = { - [PERF_COUNT_HW_CPU_CYCLES] = ARMV7_PERFCTR_CPU_CYCLES, - [PERF_COUNT_HW_INSTRUCTIONS] = - ARMV7_PERFCTR_INST_OUT_OF_RENAME_STAGE, - [PERF_COUNT_HW_CACHE_REFERENCES] = ARMV7_PERFCTR_COHERENT_LINE_HIT, - [PERF_COUNT_HW_CACHE_MISSES] = ARMV7_PERFCTR_COHERENT_LINE_MISS, - [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV7_PERFCTR_PC_WRITE, - [PERF_COUNT_HW_BRANCH_MISSES] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, - [PERF_COUNT_HW_BUS_CYCLES] = ARMV7_PERFCTR_CLOCK_CYCLES, -}; - -static const unsigned armv7_a9_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] - [PERF_COUNT_HW_CACHE_OP_MAX] - [PERF_COUNT_HW_CACHE_RESULT_MAX] = { - [C(L1D)] = { - /* - * The performance counters don't differentiate between read - * and write accesses/misses so this isn't strictly correct, - * but it's the best we can do. Writes and reads get - * combined. - */ - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS, - [C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS, - [C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(L1I)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV7_PERFCTR_IFETCH_MISS, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV7_PERFCTR_IFETCH_MISS, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(LL)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(DTLB)] = { - /* - * Only ITLB misses and DTLB refills are supported. - * If users want the DTLB refills misses a raw counter - * must be used. - */ - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(ITLB)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(BPU)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE, - [C(RESULT_MISS)] - = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE, - [C(RESULT_MISS)] - = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, -}; - -/* - * Perf Events counters - */ -enum armv7_counters { - ARMV7_CYCLE_COUNTER = 1, /* Cycle counter */ - ARMV7_COUNTER0 = 2, /* First event counter */ -}; - -/* - * The cycle counter is ARMV7_CYCLE_COUNTER. - * The first event counter is ARMV7_COUNTER0. - * The last event counter is (ARMV7_COUNTER0 + armpmu->num_events - 1). - */ -#define ARMV7_COUNTER_LAST (ARMV7_COUNTER0 + armpmu->num_events - 1) - -/* - * ARMv7 low level PMNC access - */ - -/* - * Per-CPU PMNC: config reg - */ -#define ARMV7_PMNC_E (1 << 0) /* Enable all counters */ -#define ARMV7_PMNC_P (1 << 1) /* Reset all counters */ -#define ARMV7_PMNC_C (1 << 2) /* Cycle counter reset */ -#define ARMV7_PMNC_D (1 << 3) /* CCNT counts every 64th cpu cycle */ -#define ARMV7_PMNC_X (1 << 4) /* Export to ETM */ -#define ARMV7_PMNC_DP (1 << 5) /* Disable CCNT if non-invasive debug*/ -#define ARMV7_PMNC_N_SHIFT 11 /* Number of counters supported */ -#define ARMV7_PMNC_N_MASK 0x1f -#define ARMV7_PMNC_MASK 0x3f /* Mask for writable bits */ - -/* - * Available counters - */ -#define ARMV7_CNT0 0 /* First event counter */ -#define ARMV7_CCNT 31 /* Cycle counter */ - -/* Perf Event to low level counters mapping */ -#define ARMV7_EVENT_CNT_TO_CNTx (ARMV7_COUNTER0 - ARMV7_CNT0) - -/* - * CNTENS: counters enable reg - */ -#define ARMV7_CNTENS_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx)) -#define ARMV7_CNTENS_C (1 << ARMV7_CCNT) - -/* - * CNTENC: counters disable reg - */ -#define ARMV7_CNTENC_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx)) -#define ARMV7_CNTENC_C (1 << ARMV7_CCNT) - -/* - * INTENS: counters overflow interrupt enable reg - */ -#define ARMV7_INTENS_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx)) -#define ARMV7_INTENS_C (1 << ARMV7_CCNT) - -/* - * INTENC: counters overflow interrupt disable reg - */ -#define ARMV7_INTENC_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx)) -#define ARMV7_INTENC_C (1 << ARMV7_CCNT) - -/* - * EVTSEL: Event selection reg - */ -#define ARMV7_EVTSEL_MASK 0xff /* Mask for writable bits */ - -/* - * SELECT: Counter selection reg - */ -#define ARMV7_SELECT_MASK 0x1f /* Mask for writable bits */ - -/* - * FLAG: counters overflow flag status reg - */ -#define ARMV7_FLAG_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx)) -#define ARMV7_FLAG_C (1 << ARMV7_CCNT) -#define ARMV7_FLAG_MASK 0xffffffff /* Mask for writable bits */ -#define ARMV7_OVERFLOWED_MASK ARMV7_FLAG_MASK - -static inline unsigned long armv7_pmnc_read(void) -{ - u32 val; - asm volatile("mrc p15, 0, %0, c9, c12, 0" : "=r"(val)); - return val; -} - -static inline void armv7_pmnc_write(unsigned long val) -{ - val &= ARMV7_PMNC_MASK; - asm volatile("mcr p15, 0, %0, c9, c12, 0" : : "r"(val)); -} - -static inline int armv7_pmnc_has_overflowed(unsigned long pmnc) -{ - return pmnc & ARMV7_OVERFLOWED_MASK; -} - -static inline int armv7_pmnc_counter_has_overflowed(unsigned long pmnc, - enum armv7_counters counter) -{ - int ret = 0; - - if (counter == ARMV7_CYCLE_COUNTER) - ret = pmnc & ARMV7_FLAG_C; - else if ((counter >= ARMV7_COUNTER0) && (counter <= ARMV7_COUNTER_LAST)) - ret = pmnc & ARMV7_FLAG_P(counter); - else - pr_err("CPU%u checking wrong counter %d overflow status\n", - smp_processor_id(), counter); - - return ret; -} - -static inline int armv7_pmnc_select_counter(unsigned int idx) -{ - u32 val; - - if ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST)) { - pr_err("CPU%u selecting wrong PMNC counter" - " %d\n", smp_processor_id(), idx); - return -1; - } - - val = (idx - ARMV7_EVENT_CNT_TO_CNTx) & ARMV7_SELECT_MASK; - asm volatile("mcr p15, 0, %0, c9, c12, 5" : : "r" (val)); - - return idx; -} - -static inline u32 armv7pmu_read_counter(int idx) -{ - unsigned long value = 0; - - if (idx == ARMV7_CYCLE_COUNTER) - asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r" (value)); - else if ((idx >= ARMV7_COUNTER0) && (idx <= ARMV7_COUNTER_LAST)) { - if (armv7_pmnc_select_counter(idx) == idx) - asm volatile("mrc p15, 0, %0, c9, c13, 2" - : "=r" (value)); - } else - pr_err("CPU%u reading wrong counter %d\n", - smp_processor_id(), idx); - - return value; -} - -static inline void armv7pmu_write_counter(int idx, u32 value) -{ - if (idx == ARMV7_CYCLE_COUNTER) - asm volatile("mcr p15, 0, %0, c9, c13, 0" : : "r" (value)); - else if ((idx >= ARMV7_COUNTER0) && (idx <= ARMV7_COUNTER_LAST)) { - if (armv7_pmnc_select_counter(idx) == idx) - asm volatile("mcr p15, 0, %0, c9, c13, 2" - : : "r" (value)); - } else - pr_err("CPU%u writing wrong counter %d\n", - smp_processor_id(), idx); -} - -static inline void armv7_pmnc_write_evtsel(unsigned int idx, u32 val) -{ - if (armv7_pmnc_select_counter(idx) == idx) { - val &= ARMV7_EVTSEL_MASK; - asm volatile("mcr p15, 0, %0, c9, c13, 1" : : "r" (val)); - } -} - -static inline u32 armv7_pmnc_enable_counter(unsigned int idx) -{ - u32 val; - - if ((idx != ARMV7_CYCLE_COUNTER) && - ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) { - pr_err("CPU%u enabling wrong PMNC counter" - " %d\n", smp_processor_id(), idx); - return -1; - } - - if (idx == ARMV7_CYCLE_COUNTER) - val = ARMV7_CNTENS_C; - else - val = ARMV7_CNTENS_P(idx); - - asm volatile("mcr p15, 0, %0, c9, c12, 1" : : "r" (val)); - - return idx; -} - -static inline u32 armv7_pmnc_disable_counter(unsigned int idx) -{ - u32 val; - - - if ((idx != ARMV7_CYCLE_COUNTER) && - ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) { - pr_err("CPU%u disabling wrong PMNC counter" - " %d\n", smp_processor_id(), idx); - return -1; - } - - if (idx == ARMV7_CYCLE_COUNTER) - val = ARMV7_CNTENC_C; - else - val = ARMV7_CNTENC_P(idx); - - asm volatile("mcr p15, 0, %0, c9, c12, 2" : : "r" (val)); - - return idx; -} - -static inline u32 armv7_pmnc_enable_intens(unsigned int idx) -{ - u32 val; - - if ((idx != ARMV7_CYCLE_COUNTER) && - ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) { - pr_err("CPU%u enabling wrong PMNC counter" - " interrupt enable %d\n", smp_processor_id(), idx); - return -1; - } - - if (idx == ARMV7_CYCLE_COUNTER) - val = ARMV7_INTENS_C; - else - val = ARMV7_INTENS_P(idx); - - asm volatile("mcr p15, 0, %0, c9, c14, 1" : : "r" (val)); - - return idx; -} - -static inline u32 armv7_pmnc_disable_intens(unsigned int idx) -{ - u32 val; - - if ((idx != ARMV7_CYCLE_COUNTER) && - ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) { - pr_err("CPU%u disabling wrong PMNC counter" - " interrupt enable %d\n", smp_processor_id(), idx); - return -1; - } - - if (idx == ARMV7_CYCLE_COUNTER) - val = ARMV7_INTENC_C; - else - val = ARMV7_INTENC_P(idx); - - asm volatile("mcr p15, 0, %0, c9, c14, 2" : : "r" (val)); - - return idx; -} - -static inline u32 armv7_pmnc_getreset_flags(void) -{ - u32 val; - - /* Read */ - asm volatile("mrc p15, 0, %0, c9, c12, 3" : "=r" (val)); - - /* Write to clear flags */ - val &= ARMV7_FLAG_MASK; - asm volatile("mcr p15, 0, %0, c9, c12, 3" : : "r" (val)); - - return val; -} - -#ifdef DEBUG -static void armv7_pmnc_dump_regs(void) -{ - u32 val; - unsigned int cnt; - - printk(KERN_INFO "PMNC registers dump:\n"); - - asm volatile("mrc p15, 0, %0, c9, c12, 0" : "=r" (val)); - printk(KERN_INFO "PMNC =0x%08x\n", val); - - asm volatile("mrc p15, 0, %0, c9, c12, 1" : "=r" (val)); - printk(KERN_INFO "CNTENS=0x%08x\n", val); - - asm volatile("mrc p15, 0, %0, c9, c14, 1" : "=r" (val)); - printk(KERN_INFO "INTENS=0x%08x\n", val); - - asm volatile("mrc p15, 0, %0, c9, c12, 3" : "=r" (val)); - printk(KERN_INFO "FLAGS =0x%08x\n", val); - - asm volatile("mrc p15, 0, %0, c9, c12, 5" : "=r" (val)); - printk(KERN_INFO "SELECT=0x%08x\n", val); - - asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r" (val)); - printk(KERN_INFO "CCNT =0x%08x\n", val); - - for (cnt = ARMV7_COUNTER0; cnt < ARMV7_COUNTER_LAST; cnt++) { - armv7_pmnc_select_counter(cnt); - asm volatile("mrc p15, 0, %0, c9, c13, 2" : "=r" (val)); - printk(KERN_INFO "CNT[%d] count =0x%08x\n", - cnt-ARMV7_EVENT_CNT_TO_CNTx, val); - asm volatile("mrc p15, 0, %0, c9, c13, 1" : "=r" (val)); - printk(KERN_INFO "CNT[%d] evtsel=0x%08x\n", - cnt-ARMV7_EVENT_CNT_TO_CNTx, val); - } -} -#endif - -void armv7pmu_enable_event(struct hw_perf_event *hwc, int idx) -{ - unsigned long flags; - - /* - * Enable counter and interrupt, and set the counter to count - * the event that we're interested in. - */ - spin_lock_irqsave(&pmu_lock, flags); - - /* - * Disable counter - */ - armv7_pmnc_disable_counter(idx); - - /* - * Set event (if destined for PMNx counters) - * We don't need to set the event if it's a cycle count - */ - if (idx != ARMV7_CYCLE_COUNTER) - armv7_pmnc_write_evtsel(idx, hwc->config_base); - - /* - * Enable interrupt for this counter - */ - armv7_pmnc_enable_intens(idx); - - /* - * Enable counter - */ - armv7_pmnc_enable_counter(idx); - - spin_unlock_irqrestore(&pmu_lock, flags); -} - -static void armv7pmu_disable_event(struct hw_perf_event *hwc, int idx) -{ - unsigned long flags; - - /* - * Disable counter and interrupt - */ - spin_lock_irqsave(&pmu_lock, flags); - - /* - * Disable counter - */ - armv7_pmnc_disable_counter(idx); - - /* - * Disable interrupt for this counter - */ - armv7_pmnc_disable_intens(idx); - - spin_unlock_irqrestore(&pmu_lock, flags); -} - -static irqreturn_t armv7pmu_handle_irq(int irq_num, void *dev) -{ - unsigned long pmnc; - struct perf_sample_data data; - struct cpu_hw_events *cpuc; - struct pt_regs *regs; - int idx; - - /* - * Get and reset the IRQ flags - */ - pmnc = armv7_pmnc_getreset_flags(); - - /* - * Did an overflow occur? - */ - if (!armv7_pmnc_has_overflowed(pmnc)) - return IRQ_NONE; - - /* - * Handle the counter(s) overflow(s) - */ - regs = get_irq_regs(); - - perf_sample_data_init(&data, 0); - - cpuc = &__get_cpu_var(cpu_hw_events); - for (idx = 0; idx <= armpmu->num_events; ++idx) { - struct perf_event *event = cpuc->events[idx]; - struct hw_perf_event *hwc; - - if (!test_bit(idx, cpuc->active_mask)) - continue; - - /* - * We have a single interrupt for all counters. Check that - * each counter has overflowed before we process it. - */ - if (!armv7_pmnc_counter_has_overflowed(pmnc, idx)) - continue; - - hwc = &event->hw; - armpmu_event_update(event, hwc, idx); - data.period = event->hw.last_period; - if (!armpmu_event_set_period(event, hwc, idx)) - continue; - - if (perf_event_overflow(event, 0, &data, regs)) - armpmu->disable(hwc, idx); - } - - /* - * Handle the pending perf events. - * - * Note: this call *must* be run with interrupts disabled. For - * platforms that can have the PMU interrupts raised as an NMI, this - * will not work. - */ - irq_work_run(); - - return IRQ_HANDLED; -} - -static void armv7pmu_start(void) -{ - unsigned long flags; - - spin_lock_irqsave(&pmu_lock, flags); - /* Enable all counters */ - armv7_pmnc_write(armv7_pmnc_read() | ARMV7_PMNC_E); - spin_unlock_irqrestore(&pmu_lock, flags); -} - -static void armv7pmu_stop(void) -{ - unsigned long flags; - - spin_lock_irqsave(&pmu_lock, flags); - /* Disable all counters */ - armv7_pmnc_write(armv7_pmnc_read() & ~ARMV7_PMNC_E); - spin_unlock_irqrestore(&pmu_lock, flags); -} - -static int armv7pmu_get_event_idx(struct cpu_hw_events *cpuc, - struct hw_perf_event *event) -{ - int idx; - - /* Always place a cycle counter into the cycle counter. */ - if (event->config_base == ARMV7_PERFCTR_CPU_CYCLES) { - if (test_and_set_bit(ARMV7_CYCLE_COUNTER, cpuc->used_mask)) - return -EAGAIN; - - return ARMV7_CYCLE_COUNTER; - } else { - /* - * For anything other than a cycle counter, try and use - * the events counters - */ - for (idx = ARMV7_COUNTER0; idx <= armpmu->num_events; ++idx) { - if (!test_and_set_bit(idx, cpuc->used_mask)) - return idx; - } - - /* The counters are all in use. */ - return -EAGAIN; - } -} - -static struct arm_pmu armv7pmu = { - .handle_irq = armv7pmu_handle_irq, - .enable = armv7pmu_enable_event, - .disable = armv7pmu_disable_event, - .read_counter = armv7pmu_read_counter, - .write_counter = armv7pmu_write_counter, - .get_event_idx = armv7pmu_get_event_idx, - .start = armv7pmu_start, - .stop = armv7pmu_stop, - .raw_event_mask = 0xFF, - .max_period = (1LLU << 32) - 1, -}; - -static u32 __init armv7_reset_read_pmnc(void) -{ - u32 nb_cnt; - - /* Initialize & Reset PMNC: C and P bits */ - armv7_pmnc_write(ARMV7_PMNC_P | ARMV7_PMNC_C); - - /* Read the nb of CNTx counters supported from PMNC */ - nb_cnt = (armv7_pmnc_read() >> ARMV7_PMNC_N_SHIFT) & ARMV7_PMNC_N_MASK; - - /* Add the CPU cycles counter and return */ - return nb_cnt + 1; -} - -const struct arm_pmu *__init armv7_a8_pmu_init(void) -{ - armv7pmu.id = ARM_PERF_PMU_ID_CA8; - armv7pmu.name = "ARMv7 Cortex-A8"; - armv7pmu.cache_map = &armv7_a8_perf_cache_map; - armv7pmu.event_map = &armv7_a8_perf_map; - armv7pmu.num_events = armv7_reset_read_pmnc(); - return &armv7pmu; -} - -const struct arm_pmu *__init armv7_a9_pmu_init(void) -{ - armv7pmu.id = ARM_PERF_PMU_ID_CA9; - armv7pmu.name = "ARMv7 Cortex-A9"; - armv7pmu.cache_map = &armv7_a9_perf_cache_map; - armv7pmu.event_map = &armv7_a9_perf_map; - armv7pmu.num_events = armv7_reset_read_pmnc(); - return &armv7pmu; -} - - -/* - * ARMv5 [xscale] Performance counter handling code. - * - * Based on xscale OProfile code. - * - * There are two variants of the xscale PMU that we support: - * - xscale1pmu: 2 event counters and a cycle counter - * - xscale2pmu: 4 event counters and a cycle counter - * The two variants share event definitions, but have different - * PMU structures. - */ - -enum xscale_perf_types { - XSCALE_PERFCTR_ICACHE_MISS = 0x00, - XSCALE_PERFCTR_ICACHE_NO_DELIVER = 0x01, - XSCALE_PERFCTR_DATA_STALL = 0x02, - XSCALE_PERFCTR_ITLB_MISS = 0x03, - XSCALE_PERFCTR_DTLB_MISS = 0x04, - XSCALE_PERFCTR_BRANCH = 0x05, - XSCALE_PERFCTR_BRANCH_MISS = 0x06, - XSCALE_PERFCTR_INSTRUCTION = 0x07, - XSCALE_PERFCTR_DCACHE_FULL_STALL = 0x08, - XSCALE_PERFCTR_DCACHE_FULL_STALL_CONTIG = 0x09, - XSCALE_PERFCTR_DCACHE_ACCESS = 0x0A, - XSCALE_PERFCTR_DCACHE_MISS = 0x0B, - XSCALE_PERFCTR_DCACHE_WRITE_BACK = 0x0C, - XSCALE_PERFCTR_PC_CHANGED = 0x0D, - XSCALE_PERFCTR_BCU_REQUEST = 0x10, - XSCALE_PERFCTR_BCU_FULL = 0x11, - XSCALE_PERFCTR_BCU_DRAIN = 0x12, - XSCALE_PERFCTR_BCU_ECC_NO_ELOG = 0x14, - XSCALE_PERFCTR_BCU_1_BIT_ERR = 0x15, - XSCALE_PERFCTR_RMW = 0x16, - /* XSCALE_PERFCTR_CCNT is not hardware defined */ - XSCALE_PERFCTR_CCNT = 0xFE, - XSCALE_PERFCTR_UNUSED = 0xFF, -}; - -enum xscale_counters { - XSCALE_CYCLE_COUNTER = 1, - XSCALE_COUNTER0, - XSCALE_COUNTER1, - XSCALE_COUNTER2, - XSCALE_COUNTER3, -}; - -static const unsigned xscale_perf_map[PERF_COUNT_HW_MAX] = { - [PERF_COUNT_HW_CPU_CYCLES] = XSCALE_PERFCTR_CCNT, - [PERF_COUNT_HW_INSTRUCTIONS] = XSCALE_PERFCTR_INSTRUCTION, - [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED, - [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED, - [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = XSCALE_PERFCTR_BRANCH, - [PERF_COUNT_HW_BRANCH_MISSES] = XSCALE_PERFCTR_BRANCH_MISS, - [PERF_COUNT_HW_BUS_CYCLES] = HW_OP_UNSUPPORTED, -}; - -static const unsigned xscale_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] - [PERF_COUNT_HW_CACHE_OP_MAX] - [PERF_COUNT_HW_CACHE_RESULT_MAX] = { - [C(L1D)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = XSCALE_PERFCTR_DCACHE_ACCESS, - [C(RESULT_MISS)] = XSCALE_PERFCTR_DCACHE_MISS, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = XSCALE_PERFCTR_DCACHE_ACCESS, - [C(RESULT_MISS)] = XSCALE_PERFCTR_DCACHE_MISS, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(L1I)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = XSCALE_PERFCTR_ICACHE_MISS, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = XSCALE_PERFCTR_ICACHE_MISS, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(LL)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(DTLB)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = XSCALE_PERFCTR_DTLB_MISS, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = XSCALE_PERFCTR_DTLB_MISS, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(ITLB)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = XSCALE_PERFCTR_ITLB_MISS, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = XSCALE_PERFCTR_ITLB_MISS, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(BPU)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, -}; - -#define XSCALE_PMU_ENABLE 0x001 -#define XSCALE_PMN_RESET 0x002 -#define XSCALE_CCNT_RESET 0x004 -#define XSCALE_PMU_RESET (CCNT_RESET | PMN_RESET) -#define XSCALE_PMU_CNT64 0x008 - -#define XSCALE1_OVERFLOWED_MASK 0x700 -#define XSCALE1_CCOUNT_OVERFLOW 0x400 -#define XSCALE1_COUNT0_OVERFLOW 0x100 -#define XSCALE1_COUNT1_OVERFLOW 0x200 -#define XSCALE1_CCOUNT_INT_EN 0x040 -#define XSCALE1_COUNT0_INT_EN 0x010 -#define XSCALE1_COUNT1_INT_EN 0x020 -#define XSCALE1_COUNT0_EVT_SHFT 12 -#define XSCALE1_COUNT0_EVT_MASK (0xff << XSCALE1_COUNT0_EVT_SHFT) -#define XSCALE1_COUNT1_EVT_SHFT 20 -#define XSCALE1_COUNT1_EVT_MASK (0xff << XSCALE1_COUNT1_EVT_SHFT) - -static inline u32 -xscale1pmu_read_pmnc(void) -{ - u32 val; - asm volatile("mrc p14, 0, %0, c0, c0, 0" : "=r" (val)); - return val; -} - -static inline void -xscale1pmu_write_pmnc(u32 val) -{ - /* upper 4bits and 7, 11 are write-as-0 */ - val &= 0xffff77f; - asm volatile("mcr p14, 0, %0, c0, c0, 0" : : "r" (val)); -} - -static inline int -xscale1_pmnc_counter_has_overflowed(unsigned long pmnc, - enum xscale_counters counter) -{ - int ret = 0; - - switch (counter) { - case XSCALE_CYCLE_COUNTER: - ret = pmnc & XSCALE1_CCOUNT_OVERFLOW; - break; - case XSCALE_COUNTER0: - ret = pmnc & XSCALE1_COUNT0_OVERFLOW; - break; - case XSCALE_COUNTER1: - ret = pmnc & XSCALE1_COUNT1_OVERFLOW; - break; - default: - WARN_ONCE(1, "invalid counter number (%d)\n", counter); - } - - return ret; -} - -static irqreturn_t -xscale1pmu_handle_irq(int irq_num, void *dev) -{ - unsigned long pmnc; - struct perf_sample_data data; - struct cpu_hw_events *cpuc; - struct pt_regs *regs; - int idx; - - /* - * NOTE: there's an A stepping erratum that states if an overflow - * bit already exists and another occurs, the previous - * Overflow bit gets cleared. There's no workaround. - * Fixed in B stepping or later. - */ - pmnc = xscale1pmu_read_pmnc(); - - /* - * Write the value back to clear the overflow flags. Overflow - * flags remain in pmnc for use below. We also disable the PMU - * while we process the interrupt. - */ - xscale1pmu_write_pmnc(pmnc & ~XSCALE_PMU_ENABLE); - - if (!(pmnc & XSCALE1_OVERFLOWED_MASK)) - return IRQ_NONE; - - regs = get_irq_regs(); - - perf_sample_data_init(&data, 0); - - cpuc = &__get_cpu_var(cpu_hw_events); - for (idx = 0; idx <= armpmu->num_events; ++idx) { - struct perf_event *event = cpuc->events[idx]; - struct hw_perf_event *hwc; - - if (!test_bit(idx, cpuc->active_mask)) - continue; - - if (!xscale1_pmnc_counter_has_overflowed(pmnc, idx)) - continue; - - hwc = &event->hw; - armpmu_event_update(event, hwc, idx); - data.period = event->hw.last_period; - if (!armpmu_event_set_period(event, hwc, idx)) - continue; - - if (perf_event_overflow(event, 0, &data, regs)) - armpmu->disable(hwc, idx); - } - - irq_work_run(); - - /* - * Re-enable the PMU. - */ - pmnc = xscale1pmu_read_pmnc() | XSCALE_PMU_ENABLE; - xscale1pmu_write_pmnc(pmnc); - - return IRQ_HANDLED; -} - -static void -xscale1pmu_enable_event(struct hw_perf_event *hwc, int idx) -{ - unsigned long val, mask, evt, flags; - - switch (idx) { - case XSCALE_CYCLE_COUNTER: - mask = 0; - evt = XSCALE1_CCOUNT_INT_EN; - break; - case XSCALE_COUNTER0: - mask = XSCALE1_COUNT0_EVT_MASK; - evt = (hwc->config_base << XSCALE1_COUNT0_EVT_SHFT) | - XSCALE1_COUNT0_INT_EN; - break; - case XSCALE_COUNTER1: - mask = XSCALE1_COUNT1_EVT_MASK; - evt = (hwc->config_base << XSCALE1_COUNT1_EVT_SHFT) | - XSCALE1_COUNT1_INT_EN; - break; - default: - WARN_ONCE(1, "invalid counter number (%d)\n", idx); - return; - } - - spin_lock_irqsave(&pmu_lock, flags); - val = xscale1pmu_read_pmnc(); - val &= ~mask; - val |= evt; - xscale1pmu_write_pmnc(val); - spin_unlock_irqrestore(&pmu_lock, flags); -} - -static void -xscale1pmu_disable_event(struct hw_perf_event *hwc, int idx) -{ - unsigned long val, mask, evt, flags; - - switch (idx) { - case XSCALE_CYCLE_COUNTER: - mask = XSCALE1_CCOUNT_INT_EN; - evt = 0; - break; - case XSCALE_COUNTER0: - mask = XSCALE1_COUNT0_INT_EN | XSCALE1_COUNT0_EVT_MASK; - evt = XSCALE_PERFCTR_UNUSED << XSCALE1_COUNT0_EVT_SHFT; - break; - case XSCALE_COUNTER1: - mask = XSCALE1_COUNT1_INT_EN | XSCALE1_COUNT1_EVT_MASK; - evt = XSCALE_PERFCTR_UNUSED << XSCALE1_COUNT1_EVT_SHFT; - break; - default: - WARN_ONCE(1, "invalid counter number (%d)\n", idx); - return; - } - - spin_lock_irqsave(&pmu_lock, flags); - val = xscale1pmu_read_pmnc(); - val &= ~mask; - val |= evt; - xscale1pmu_write_pmnc(val); - spin_unlock_irqrestore(&pmu_lock, flags); -} - -static int -xscale1pmu_get_event_idx(struct cpu_hw_events *cpuc, - struct hw_perf_event *event) -{ - if (XSCALE_PERFCTR_CCNT == event->config_base) { - if (test_and_set_bit(XSCALE_CYCLE_COUNTER, cpuc->used_mask)) - return -EAGAIN; - - return XSCALE_CYCLE_COUNTER; - } else { - if (!test_and_set_bit(XSCALE_COUNTER1, cpuc->used_mask)) { - return XSCALE_COUNTER1; - } - - if (!test_and_set_bit(XSCALE_COUNTER0, cpuc->used_mask)) { - return XSCALE_COUNTER0; - } - - return -EAGAIN; - } -} - -static void -xscale1pmu_start(void) -{ - unsigned long flags, val; - - spin_lock_irqsave(&pmu_lock, flags); - val = xscale1pmu_read_pmnc(); - val |= XSCALE_PMU_ENABLE; - xscale1pmu_write_pmnc(val); - spin_unlock_irqrestore(&pmu_lock, flags); -} - -static void -xscale1pmu_stop(void) -{ - unsigned long flags, val; - - spin_lock_irqsave(&pmu_lock, flags); - val = xscale1pmu_read_pmnc(); - val &= ~XSCALE_PMU_ENABLE; - xscale1pmu_write_pmnc(val); - spin_unlock_irqrestore(&pmu_lock, flags); -} - -static inline u32 -xscale1pmu_read_counter(int counter) -{ - u32 val = 0; - - switch (counter) { - case XSCALE_CYCLE_COUNTER: - asm volatile("mrc p14, 0, %0, c1, c0, 0" : "=r" (val)); - break; - case XSCALE_COUNTER0: - asm volatile("mrc p14, 0, %0, c2, c0, 0" : "=r" (val)); - break; - case XSCALE_COUNTER1: - asm volatile("mrc p14, 0, %0, c3, c0, 0" : "=r" (val)); - break; - } - - return val; -} - -static inline void -xscale1pmu_write_counter(int counter, u32 val) -{ - switch (counter) { - case XSCALE_CYCLE_COUNTER: - asm volatile("mcr p14, 0, %0, c1, c0, 0" : : "r" (val)); - break; - case XSCALE_COUNTER0: - asm volatile("mcr p14, 0, %0, c2, c0, 0" : : "r" (val)); - break; - case XSCALE_COUNTER1: - asm volatile("mcr p14, 0, %0, c3, c0, 0" : : "r" (val)); - break; - } -} - -static const struct arm_pmu xscale1pmu = { - .id = ARM_PERF_PMU_ID_XSCALE1, - .name = "xscale1", - .handle_irq = xscale1pmu_handle_irq, - .enable = xscale1pmu_enable_event, - .disable = xscale1pmu_disable_event, - .read_counter = xscale1pmu_read_counter, - .write_counter = xscale1pmu_write_counter, - .get_event_idx = xscale1pmu_get_event_idx, - .start = xscale1pmu_start, - .stop = xscale1pmu_stop, - .cache_map = &xscale_perf_cache_map, - .event_map = &xscale_perf_map, - .raw_event_mask = 0xFF, - .num_events = 3, - .max_period = (1LLU << 32) - 1, -}; - -const struct arm_pmu *__init xscale1pmu_init(void) -{ - return &xscale1pmu; -} - -#define XSCALE2_OVERFLOWED_MASK 0x01f -#define XSCALE2_CCOUNT_OVERFLOW 0x001 -#define XSCALE2_COUNT0_OVERFLOW 0x002 -#define XSCALE2_COUNT1_OVERFLOW 0x004 -#define XSCALE2_COUNT2_OVERFLOW 0x008 -#define XSCALE2_COUNT3_OVERFLOW 0x010 -#define XSCALE2_CCOUNT_INT_EN 0x001 -#define XSCALE2_COUNT0_INT_EN 0x002 -#define XSCALE2_COUNT1_INT_EN 0x004 -#define XSCALE2_COUNT2_INT_EN 0x008 -#define XSCALE2_COUNT3_INT_EN 0x010 -#define XSCALE2_COUNT0_EVT_SHFT 0 -#define XSCALE2_COUNT0_EVT_MASK (0xff << XSCALE2_COUNT0_EVT_SHFT) -#define XSCALE2_COUNT1_EVT_SHFT 8 -#define XSCALE2_COUNT1_EVT_MASK (0xff << XSCALE2_COUNT1_EVT_SHFT) -#define XSCALE2_COUNT2_EVT_SHFT 16 -#define XSCALE2_COUNT2_EVT_MASK (0xff << XSCALE2_COUNT2_EVT_SHFT) -#define XSCALE2_COUNT3_EVT_SHFT 24 -#define XSCALE2_COUNT3_EVT_MASK (0xff << XSCALE2_COUNT3_EVT_SHFT) - -static inline u32 -xscale2pmu_read_pmnc(void) -{ - u32 val; - asm volatile("mrc p14, 0, %0, c0, c1, 0" : "=r" (val)); - /* bits 1-2 and 4-23 are read-unpredictable */ - return val & 0xff000009; -} - -static inline void -xscale2pmu_write_pmnc(u32 val) -{ - /* bits 4-23 are write-as-0, 24-31 are write ignored */ - val &= 0xf; - asm volatile("mcr p14, 0, %0, c0, c1, 0" : : "r" (val)); -} - -static inline u32 -xscale2pmu_read_overflow_flags(void) -{ - u32 val; - asm volatile("mrc p14, 0, %0, c5, c1, 0" : "=r" (val)); - return val; -} - -static inline void -xscale2pmu_write_overflow_flags(u32 val) -{ - asm volatile("mcr p14, 0, %0, c5, c1, 0" : : "r" (val)); -} - -static inline u32 -xscale2pmu_read_event_select(void) -{ - u32 val; - asm volatile("mrc p14, 0, %0, c8, c1, 0" : "=r" (val)); - return val; -} - -static inline void -xscale2pmu_write_event_select(u32 val) -{ - asm volatile("mcr p14, 0, %0, c8, c1, 0" : : "r"(val)); -} - -static inline u32 -xscale2pmu_read_int_enable(void) -{ - u32 val; - asm volatile("mrc p14, 0, %0, c4, c1, 0" : "=r" (val)); - return val; -} - -static void -xscale2pmu_write_int_enable(u32 val) -{ - asm volatile("mcr p14, 0, %0, c4, c1, 0" : : "r" (val)); -} - -static inline int -xscale2_pmnc_counter_has_overflowed(unsigned long of_flags, - enum xscale_counters counter) -{ - int ret = 0; - - switch (counter) { - case XSCALE_CYCLE_COUNTER: - ret = of_flags & XSCALE2_CCOUNT_OVERFLOW; - break; - case XSCALE_COUNTER0: - ret = of_flags & XSCALE2_COUNT0_OVERFLOW; - break; - case XSCALE_COUNTER1: - ret = of_flags & XSCALE2_COUNT1_OVERFLOW; - break; - case XSCALE_COUNTER2: - ret = of_flags & XSCALE2_COUNT2_OVERFLOW; - break; - case XSCALE_COUNTER3: - ret = of_flags & XSCALE2_COUNT3_OVERFLOW; - break; - default: - WARN_ONCE(1, "invalid counter number (%d)\n", counter); - } - - return ret; -} - -static irqreturn_t -xscale2pmu_handle_irq(int irq_num, void *dev) -{ - unsigned long pmnc, of_flags; - struct perf_sample_data data; - struct cpu_hw_events *cpuc; - struct pt_regs *regs; - int idx; - - /* Disable the PMU. */ - pmnc = xscale2pmu_read_pmnc(); - xscale2pmu_write_pmnc(pmnc & ~XSCALE_PMU_ENABLE); - - /* Check the overflow flag register. */ - of_flags = xscale2pmu_read_overflow_flags(); - if (!(of_flags & XSCALE2_OVERFLOWED_MASK)) - return IRQ_NONE; - - /* Clear the overflow bits. */ - xscale2pmu_write_overflow_flags(of_flags); - - regs = get_irq_regs(); - - perf_sample_data_init(&data, 0); - - cpuc = &__get_cpu_var(cpu_hw_events); - for (idx = 0; idx <= armpmu->num_events; ++idx) { - struct perf_event *event = cpuc->events[idx]; - struct hw_perf_event *hwc; - - if (!test_bit(idx, cpuc->active_mask)) - continue; - - if (!xscale2_pmnc_counter_has_overflowed(pmnc, idx)) - continue; - - hwc = &event->hw; - armpmu_event_update(event, hwc, idx); - data.period = event->hw.last_period; - if (!armpmu_event_set_period(event, hwc, idx)) - continue; - - if (perf_event_overflow(event, 0, &data, regs)) - armpmu->disable(hwc, idx); - } - - irq_work_run(); - - /* - * Re-enable the PMU. - */ - pmnc = xscale2pmu_read_pmnc() | XSCALE_PMU_ENABLE; - xscale2pmu_write_pmnc(pmnc); - - return IRQ_HANDLED; -} - -static void -xscale2pmu_enable_event(struct hw_perf_event *hwc, int idx) -{ - unsigned long flags, ien, evtsel; - - ien = xscale2pmu_read_int_enable(); - evtsel = xscale2pmu_read_event_select(); - - switch (idx) { - case XSCALE_CYCLE_COUNTER: - ien |= XSCALE2_CCOUNT_INT_EN; - break; - case XSCALE_COUNTER0: - ien |= XSCALE2_COUNT0_INT_EN; - evtsel &= ~XSCALE2_COUNT0_EVT_MASK; - evtsel |= hwc->config_base << XSCALE2_COUNT0_EVT_SHFT; - break; - case XSCALE_COUNTER1: - ien |= XSCALE2_COUNT1_INT_EN; - evtsel &= ~XSCALE2_COUNT1_EVT_MASK; - evtsel |= hwc->config_base << XSCALE2_COUNT1_EVT_SHFT; - break; - case XSCALE_COUNTER2: - ien |= XSCALE2_COUNT2_INT_EN; - evtsel &= ~XSCALE2_COUNT2_EVT_MASK; - evtsel |= hwc->config_base << XSCALE2_COUNT2_EVT_SHFT; - break; - case XSCALE_COUNTER3: - ien |= XSCALE2_COUNT3_INT_EN; - evtsel &= ~XSCALE2_COUNT3_EVT_MASK; - evtsel |= hwc->config_base << XSCALE2_COUNT3_EVT_SHFT; - break; - default: - WARN_ONCE(1, "invalid counter number (%d)\n", idx); - return; - } - - spin_lock_irqsave(&pmu_lock, flags); - xscale2pmu_write_event_select(evtsel); - xscale2pmu_write_int_enable(ien); - spin_unlock_irqrestore(&pmu_lock, flags); -} - -static void -xscale2pmu_disable_event(struct hw_perf_event *hwc, int idx) -{ - unsigned long flags, ien, evtsel; - - ien = xscale2pmu_read_int_enable(); - evtsel = xscale2pmu_read_event_select(); - - switch (idx) { - case XSCALE_CYCLE_COUNTER: - ien &= ~XSCALE2_CCOUNT_INT_EN; - break; - case XSCALE_COUNTER0: - ien &= ~XSCALE2_COUNT0_INT_EN; - evtsel &= ~XSCALE2_COUNT0_EVT_MASK; - evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT0_EVT_SHFT; - break; - case XSCALE_COUNTER1: - ien &= ~XSCALE2_COUNT1_INT_EN; - evtsel &= ~XSCALE2_COUNT1_EVT_MASK; - evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT1_EVT_SHFT; - break; - case XSCALE_COUNTER2: - ien &= ~XSCALE2_COUNT2_INT_EN; - evtsel &= ~XSCALE2_COUNT2_EVT_MASK; - evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT2_EVT_SHFT; - break; - case XSCALE_COUNTER3: - ien &= ~XSCALE2_COUNT3_INT_EN; - evtsel &= ~XSCALE2_COUNT3_EVT_MASK; - evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT3_EVT_SHFT; - break; - default: - WARN_ONCE(1, "invalid counter number (%d)\n", idx); - return; - } - - spin_lock_irqsave(&pmu_lock, flags); - xscale2pmu_write_event_select(evtsel); - xscale2pmu_write_int_enable(ien); - spin_unlock_irqrestore(&pmu_lock, flags); -} - -static int -xscale2pmu_get_event_idx(struct cpu_hw_events *cpuc, - struct hw_perf_event *event) -{ - int idx = xscale1pmu_get_event_idx(cpuc, event); - if (idx >= 0) - goto out; - - if (!test_and_set_bit(XSCALE_COUNTER3, cpuc->used_mask)) - idx = XSCALE_COUNTER3; - else if (!test_and_set_bit(XSCALE_COUNTER2, cpuc->used_mask)) - idx = XSCALE_COUNTER2; -out: - return idx; -} - -static void -xscale2pmu_start(void) -{ - unsigned long flags, val; - - spin_lock_irqsave(&pmu_lock, flags); - val = xscale2pmu_read_pmnc() & ~XSCALE_PMU_CNT64; - val |= XSCALE_PMU_ENABLE; - xscale2pmu_write_pmnc(val); - spin_unlock_irqrestore(&pmu_lock, flags); -} - -static void -xscale2pmu_stop(void) -{ - unsigned long flags, val; - - spin_lock_irqsave(&pmu_lock, flags); - val = xscale2pmu_read_pmnc(); - val &= ~XSCALE_PMU_ENABLE; - xscale2pmu_write_pmnc(val); - spin_unlock_irqrestore(&pmu_lock, flags); -} - -static inline u32 -xscale2pmu_read_counter(int counter) -{ - u32 val = 0; - - switch (counter) { - case XSCALE_CYCLE_COUNTER: - asm volatile("mrc p14, 0, %0, c1, c1, 0" : "=r" (val)); - break; - case XSCALE_COUNTER0: - asm volatile("mrc p14, 0, %0, c0, c2, 0" : "=r" (val)); - break; - case XSCALE_COUNTER1: - asm volatile("mrc p14, 0, %0, c1, c2, 0" : "=r" (val)); - break; - case XSCALE_COUNTER2: - asm volatile("mrc p14, 0, %0, c2, c2, 0" : "=r" (val)); - break; - case XSCALE_COUNTER3: - asm volatile("mrc p14, 0, %0, c3, c2, 0" : "=r" (val)); - break; - } - - return val; -} - -static inline void -xscale2pmu_write_counter(int counter, u32 val) -{ - switch (counter) { - case XSCALE_CYCLE_COUNTER: - asm volatile("mcr p14, 0, %0, c1, c1, 0" : : "r" (val)); - break; - case XSCALE_COUNTER0: - asm volatile("mcr p14, 0, %0, c0, c2, 0" : : "r" (val)); - break; - case XSCALE_COUNTER1: - asm volatile("mcr p14, 0, %0, c1, c2, 0" : : "r" (val)); - break; - case XSCALE_COUNTER2: - asm volatile("mcr p14, 0, %0, c2, c2, 0" : : "r" (val)); - break; - case XSCALE_COUNTER3: - asm volatile("mcr p14, 0, %0, c3, c2, 0" : : "r" (val)); - break; - } -} - -static const struct arm_pmu xscale2pmu = { - .id = ARM_PERF_PMU_ID_XSCALE2, - .name = "xscale2", - .handle_irq = xscale2pmu_handle_irq, - .enable = xscale2pmu_enable_event, - .disable = xscale2pmu_disable_event, - .read_counter = xscale2pmu_read_counter, - .write_counter = xscale2pmu_write_counter, - .get_event_idx = xscale2pmu_get_event_idx, - .start = xscale2pmu_start, - .stop = xscale2pmu_stop, - .cache_map = &xscale_perf_cache_map, - .event_map = &xscale_perf_map, - .raw_event_mask = 0xFF, - .num_events = 5, - .max_period = (1LLU << 32) - 1, -}; - -const struct arm_pmu *__init xscale2pmu_init(void) -{ - return &xscale2pmu; -} +/* Include the PMU-specific implementations. */ +#include "perf_event_xscale.c" +#include "perf_event_v6.c" +#include "perf_event_v7.c" static int __init init_hw_perf_events(void) diff --git a/arch/arm/kernel/perf_event_v6.c b/arch/arm/kernel/perf_event_v6.c new file mode 100644 index 0000000..7aeb07d --- /dev/null +++ b/arch/arm/kernel/perf_event_v6.c @@ -0,0 +1,672 @@ +/* + * ARMv6 Performance counter handling code. + * + * Copyright (C) 2009 picoChip Designs, Ltd., Jamie Iles + * + * ARMv6 has 2 configurable performance counters and a single cycle counter. + * They all share a single reset bit but can be written to zero so we can use + * that for a reset. + * + * The counters can't be individually enabled or disabled so when we remove + * one event and replace it with another we could get spurious counts from the + * wrong event. However, we can take advantage of the fact that the + * performance counters can export events to the event bus, and the event bus + * itself can be monitored. This requires that we *don't* export the events to + * the event bus. The procedure for disabling a configurable counter is: + * - change the counter to count the ETMEXTOUT[0] signal (0x20). This + * effectively stops the counter from counting. + * - disable the counter's interrupt generation (each counter has it's + * own interrupt enable bit). + * Once stopped, the counter value can be written as 0 to reset. + * + * To enable a counter: + * - enable the counter's interrupt generation. + * - set the new event type. + * + * Note: the dedicated cycle counter only counts cycles and can't be + * enabled/disabled independently of the others. When we want to disable the + * cycle counter, we have to just disable the interrupt reporting and start + * ignoring that counter. When re-enabling, we have to reset the value and + * enable the interrupt. + */ + +#ifdef CONFIG_CPU_V6 +enum armv6_perf_types { + ARMV6_PERFCTR_ICACHE_MISS = 0x0, + ARMV6_PERFCTR_IBUF_STALL = 0x1, + ARMV6_PERFCTR_DDEP_STALL = 0x2, + ARMV6_PERFCTR_ITLB_MISS = 0x3, + ARMV6_PERFCTR_DTLB_MISS = 0x4, + ARMV6_PERFCTR_BR_EXEC = 0x5, + ARMV6_PERFCTR_BR_MISPREDICT = 0x6, + ARMV6_PERFCTR_INSTR_EXEC = 0x7, + ARMV6_PERFCTR_DCACHE_HIT = 0x9, + ARMV6_PERFCTR_DCACHE_ACCESS = 0xA, + ARMV6_PERFCTR_DCACHE_MISS = 0xB, + ARMV6_PERFCTR_DCACHE_WBACK = 0xC, + ARMV6_PERFCTR_SW_PC_CHANGE = 0xD, + ARMV6_PERFCTR_MAIN_TLB_MISS = 0xF, + ARMV6_PERFCTR_EXPL_D_ACCESS = 0x10, + ARMV6_PERFCTR_LSU_FULL_STALL = 0x11, + ARMV6_PERFCTR_WBUF_DRAINED = 0x12, + ARMV6_PERFCTR_CPU_CYCLES = 0xFF, + ARMV6_PERFCTR_NOP = 0x20, +}; + +enum armv6_counters { + ARMV6_CYCLE_COUNTER = 1, + ARMV6_COUNTER0, + ARMV6_COUNTER1, +}; + +/* + * The hardware events that we support. We do support cache operations but + * we have harvard caches and no way to combine instruction and data + * accesses/misses in hardware. + */ +static const unsigned armv6_perf_map[PERF_COUNT_HW_MAX] = { + [PERF_COUNT_HW_CPU_CYCLES] = ARMV6_PERFCTR_CPU_CYCLES, + [PERF_COUNT_HW_INSTRUCTIONS] = ARMV6_PERFCTR_INSTR_EXEC, + [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED, + [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED, + [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV6_PERFCTR_BR_EXEC, + [PERF_COUNT_HW_BRANCH_MISSES] = ARMV6_PERFCTR_BR_MISPREDICT, + [PERF_COUNT_HW_BUS_CYCLES] = HW_OP_UNSUPPORTED, +}; + +static const unsigned armv6_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] + [PERF_COUNT_HW_CACHE_OP_MAX] + [PERF_COUNT_HW_CACHE_RESULT_MAX] = { + [C(L1D)] = { + /* + * The performance counters don't differentiate between read + * and write accesses/misses so this isn't strictly correct, + * but it's the best we can do. Writes and reads get + * combined. + */ + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = ARMV6_PERFCTR_DCACHE_ACCESS, + [C(RESULT_MISS)] = ARMV6_PERFCTR_DCACHE_MISS, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = ARMV6_PERFCTR_DCACHE_ACCESS, + [C(RESULT_MISS)] = ARMV6_PERFCTR_DCACHE_MISS, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + }, + [C(L1I)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = ARMV6_PERFCTR_ICACHE_MISS, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = ARMV6_PERFCTR_ICACHE_MISS, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + }, + [C(LL)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + }, + [C(DTLB)] = { + /* + * The ARM performance counters can count micro DTLB misses, + * micro ITLB misses and main TLB misses. There isn't an event + * for TLB misses, so use the micro misses here and if users + * want the main TLB misses they can use a raw counter. + */ + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = ARMV6_PERFCTR_DTLB_MISS, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = ARMV6_PERFCTR_DTLB_MISS, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + }, + [C(ITLB)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = ARMV6_PERFCTR_ITLB_MISS, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = ARMV6_PERFCTR_ITLB_MISS, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + }, + [C(BPU)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + }, +}; + +enum armv6mpcore_perf_types { + ARMV6MPCORE_PERFCTR_ICACHE_MISS = 0x0, + ARMV6MPCORE_PERFCTR_IBUF_STALL = 0x1, + ARMV6MPCORE_PERFCTR_DDEP_STALL = 0x2, + ARMV6MPCORE_PERFCTR_ITLB_MISS = 0x3, + ARMV6MPCORE_PERFCTR_DTLB_MISS = 0x4, + ARMV6MPCORE_PERFCTR_BR_EXEC = 0x5, + ARMV6MPCORE_PERFCTR_BR_NOTPREDICT = 0x6, + ARMV6MPCORE_PERFCTR_BR_MISPREDICT = 0x7, + ARMV6MPCORE_PERFCTR_INSTR_EXEC = 0x8, + ARMV6MPCORE_PERFCTR_DCACHE_RDACCESS = 0xA, + ARMV6MPCORE_PERFCTR_DCACHE_RDMISS = 0xB, + ARMV6MPCORE_PERFCTR_DCACHE_WRACCESS = 0xC, + ARMV6MPCORE_PERFCTR_DCACHE_WRMISS = 0xD, + ARMV6MPCORE_PERFCTR_DCACHE_EVICTION = 0xE, + ARMV6MPCORE_PERFCTR_SW_PC_CHANGE = 0xF, + ARMV6MPCORE_PERFCTR_MAIN_TLB_MISS = 0x10, + ARMV6MPCORE_PERFCTR_EXPL_MEM_ACCESS = 0x11, + ARMV6MPCORE_PERFCTR_LSU_FULL_STALL = 0x12, + ARMV6MPCORE_PERFCTR_WBUF_DRAINED = 0x13, + ARMV6MPCORE_PERFCTR_CPU_CYCLES = 0xFF, +}; + +/* + * The hardware events that we support. We do support cache operations but + * we have harvard caches and no way to combine instruction and data + * accesses/misses in hardware. + */ +static const unsigned armv6mpcore_perf_map[PERF_COUNT_HW_MAX] = { + [PERF_COUNT_HW_CPU_CYCLES] = ARMV6MPCORE_PERFCTR_CPU_CYCLES, + [PERF_COUNT_HW_INSTRUCTIONS] = ARMV6MPCORE_PERFCTR_INSTR_EXEC, + [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED, + [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED, + [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV6MPCORE_PERFCTR_BR_EXEC, + [PERF_COUNT_HW_BRANCH_MISSES] = ARMV6MPCORE_PERFCTR_BR_MISPREDICT, + [PERF_COUNT_HW_BUS_CYCLES] = HW_OP_UNSUPPORTED, +}; + +static const unsigned armv6mpcore_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] + [PERF_COUNT_HW_CACHE_OP_MAX] + [PERF_COUNT_HW_CACHE_RESULT_MAX] = { + [C(L1D)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = + ARMV6MPCORE_PERFCTR_DCACHE_RDACCESS, + [C(RESULT_MISS)] = + ARMV6MPCORE_PERFCTR_DCACHE_RDMISS, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = + ARMV6MPCORE_PERFCTR_DCACHE_WRACCESS, + [C(RESULT_MISS)] = + ARMV6MPCORE_PERFCTR_DCACHE_WRMISS, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + }, + [C(L1I)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_ICACHE_MISS, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_ICACHE_MISS, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + }, + [C(LL)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + }, + [C(DTLB)] = { + /* + * The ARM performance counters can count micro DTLB misses, + * micro ITLB misses and main TLB misses. There isn't an event + * for TLB misses, so use the micro misses here and if users + * want the main TLB misses they can use a raw counter. + */ + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_DTLB_MISS, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_DTLB_MISS, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + }, + [C(ITLB)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_ITLB_MISS, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_ITLB_MISS, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + }, + [C(BPU)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + }, +}; + +static inline unsigned long +armv6_pmcr_read(void) +{ + u32 val; + asm volatile("mrc p15, 0, %0, c15, c12, 0" : "=r"(val)); + return val; +} + +static inline void +armv6_pmcr_write(unsigned long val) +{ + asm volatile("mcr p15, 0, %0, c15, c12, 0" : : "r"(val)); +} + +#define ARMV6_PMCR_ENABLE (1 << 0) +#define ARMV6_PMCR_CTR01_RESET (1 << 1) +#define ARMV6_PMCR_CCOUNT_RESET (1 << 2) +#define ARMV6_PMCR_CCOUNT_DIV (1 << 3) +#define ARMV6_PMCR_COUNT0_IEN (1 << 4) +#define ARMV6_PMCR_COUNT1_IEN (1 << 5) +#define ARMV6_PMCR_CCOUNT_IEN (1 << 6) +#define ARMV6_PMCR_COUNT0_OVERFLOW (1 << 8) +#define ARMV6_PMCR_COUNT1_OVERFLOW (1 << 9) +#define ARMV6_PMCR_CCOUNT_OVERFLOW (1 << 10) +#define ARMV6_PMCR_EVT_COUNT0_SHIFT 20 +#define ARMV6_PMCR_EVT_COUNT0_MASK (0xFF << ARMV6_PMCR_EVT_COUNT0_SHIFT) +#define ARMV6_PMCR_EVT_COUNT1_SHIFT 12 +#define ARMV6_PMCR_EVT_COUNT1_MASK (0xFF << ARMV6_PMCR_EVT_COUNT1_SHIFT) + +#define ARMV6_PMCR_OVERFLOWED_MASK \ + (ARMV6_PMCR_COUNT0_OVERFLOW | ARMV6_PMCR_COUNT1_OVERFLOW | \ + ARMV6_PMCR_CCOUNT_OVERFLOW) + +static inline int +armv6_pmcr_has_overflowed(unsigned long pmcr) +{ + return pmcr & ARMV6_PMCR_OVERFLOWED_MASK; +} + +static inline int +armv6_pmcr_counter_has_overflowed(unsigned long pmcr, + enum armv6_counters counter) +{ + int ret = 0; + + if (ARMV6_CYCLE_COUNTER == counter) + ret = pmcr & ARMV6_PMCR_CCOUNT_OVERFLOW; + else if (ARMV6_COUNTER0 == counter) + ret = pmcr & ARMV6_PMCR_COUNT0_OVERFLOW; + else if (ARMV6_COUNTER1 == counter) + ret = pmcr & ARMV6_PMCR_COUNT1_OVERFLOW; + else + WARN_ONCE(1, "invalid counter number (%d)\n", counter); + + return ret; +} + +static inline u32 +armv6pmu_read_counter(int counter) +{ + unsigned long value = 0; + + if (ARMV6_CYCLE_COUNTER == counter) + asm volatile("mrc p15, 0, %0, c15, c12, 1" : "=r"(value)); + else if (ARMV6_COUNTER0 == counter) + asm volatile("mrc p15, 0, %0, c15, c12, 2" : "=r"(value)); + else if (ARMV6_COUNTER1 == counter) + asm volatile("mrc p15, 0, %0, c15, c12, 3" : "=r"(value)); + else + WARN_ONCE(1, "invalid counter number (%d)\n", counter); + + return value; +} + +static inline void +armv6pmu_write_counter(int counter, + u32 value) +{ + if (ARMV6_CYCLE_COUNTER == counter) + asm volatile("mcr p15, 0, %0, c15, c12, 1" : : "r"(value)); + else if (ARMV6_COUNTER0 == counter) + asm volatile("mcr p15, 0, %0, c15, c12, 2" : : "r"(value)); + else if (ARMV6_COUNTER1 == counter) + asm volatile("mcr p15, 0, %0, c15, c12, 3" : : "r"(value)); + else + WARN_ONCE(1, "invalid counter number (%d)\n", counter); +} + +void +armv6pmu_enable_event(struct hw_perf_event *hwc, + int idx) +{ + unsigned long val, mask, evt, flags; + + if (ARMV6_CYCLE_COUNTER == idx) { + mask = 0; + evt = ARMV6_PMCR_CCOUNT_IEN; + } else if (ARMV6_COUNTER0 == idx) { + mask = ARMV6_PMCR_EVT_COUNT0_MASK; + evt = (hwc->config_base << ARMV6_PMCR_EVT_COUNT0_SHIFT) | + ARMV6_PMCR_COUNT0_IEN; + } else if (ARMV6_COUNTER1 == idx) { + mask = ARMV6_PMCR_EVT_COUNT1_MASK; + evt = (hwc->config_base << ARMV6_PMCR_EVT_COUNT1_SHIFT) | + ARMV6_PMCR_COUNT1_IEN; + } else { + WARN_ONCE(1, "invalid counter number (%d)\n", idx); + return; + } + + /* + * Mask out the current event and set the counter to count the event + * that we're interested in. + */ + spin_lock_irqsave(&pmu_lock, flags); + val = armv6_pmcr_read(); + val &= ~mask; + val |= evt; + armv6_pmcr_write(val); + spin_unlock_irqrestore(&pmu_lock, flags); +} + +static irqreturn_t +armv6pmu_handle_irq(int irq_num, + void *dev) +{ + unsigned long pmcr = armv6_pmcr_read(); + struct perf_sample_data data; + struct cpu_hw_events *cpuc; + struct pt_regs *regs; + int idx; + + if (!armv6_pmcr_has_overflowed(pmcr)) + return IRQ_NONE; + + regs = get_irq_regs(); + + /* + * The interrupts are cleared by writing the overflow flags back to + * the control register. All of the other bits don't have any effect + * if they are rewritten, so write the whole value back. + */ + armv6_pmcr_write(pmcr); + + perf_sample_data_init(&data, 0); + + cpuc = &__get_cpu_var(cpu_hw_events); + for (idx = 0; idx <= armpmu->num_events; ++idx) { + struct perf_event *event = cpuc->events[idx]; + struct hw_perf_event *hwc; + + if (!test_bit(idx, cpuc->active_mask)) + continue; + + /* + * We have a single interrupt for all counters. Check that + * each counter has overflowed before we process it. + */ + if (!armv6_pmcr_counter_has_overflowed(pmcr, idx)) + continue; + + hwc = &event->hw; + armpmu_event_update(event, hwc, idx); + data.period = event->hw.last_period; + if (!armpmu_event_set_period(event, hwc, idx)) + continue; + + if (perf_event_overflow(event, 0, &data, regs)) + armpmu->disable(hwc, idx); + } + + /* + * Handle the pending perf events. + * + * Note: this call *must* be run with interrupts disabled. For + * platforms that can have the PMU interrupts raised as an NMI, this + * will not work. + */ + irq_work_run(); + + return IRQ_HANDLED; +} + +static void +armv6pmu_start(void) +{ + unsigned long flags, val; + + spin_lock_irqsave(&pmu_lock, flags); + val = armv6_pmcr_read(); + val |= ARMV6_PMCR_ENABLE; + armv6_pmcr_write(val); + spin_unlock_irqrestore(&pmu_lock, flags); +} + +static void +armv6pmu_stop(void) +{ + unsigned long flags, val; + + spin_lock_irqsave(&pmu_lock, flags); + val = armv6_pmcr_read(); + val &= ~ARMV6_PMCR_ENABLE; + armv6_pmcr_write(val); + spin_unlock_irqrestore(&pmu_lock, flags); +} + +static int +armv6pmu_get_event_idx(struct cpu_hw_events *cpuc, + struct hw_perf_event *event) +{ + /* Always place a cycle counter into the cycle counter. */ + if (ARMV6_PERFCTR_CPU_CYCLES == event->config_base) { + if (test_and_set_bit(ARMV6_CYCLE_COUNTER, cpuc->used_mask)) + return -EAGAIN; + + return ARMV6_CYCLE_COUNTER; + } else { + /* + * For anything other than a cycle counter, try and use + * counter0 and counter1. + */ + if (!test_and_set_bit(ARMV6_COUNTER1, cpuc->used_mask)) + return ARMV6_COUNTER1; + + if (!test_and_set_bit(ARMV6_COUNTER0, cpuc->used_mask)) + return ARMV6_COUNTER0; + + /* The counters are all in use. */ + return -EAGAIN; + } +} + +static void +armv6pmu_disable_event(struct hw_perf_event *hwc, + int idx) +{ + unsigned long val, mask, evt, flags; + + if (ARMV6_CYCLE_COUNTER == idx) { + mask = ARMV6_PMCR_CCOUNT_IEN; + evt = 0; + } else if (ARMV6_COUNTER0 == idx) { + mask = ARMV6_PMCR_COUNT0_IEN | ARMV6_PMCR_EVT_COUNT0_MASK; + evt = ARMV6_PERFCTR_NOP << ARMV6_PMCR_EVT_COUNT0_SHIFT; + } else if (ARMV6_COUNTER1 == idx) { + mask = ARMV6_PMCR_COUNT1_IEN | ARMV6_PMCR_EVT_COUNT1_MASK; + evt = ARMV6_PERFCTR_NOP << ARMV6_PMCR_EVT_COUNT1_SHIFT; + } else { + WARN_ONCE(1, "invalid counter number (%d)\n", idx); + return; + } + + /* + * Mask out the current event and set the counter to count the number + * of ETM bus signal assertion cycles. The external reporting should + * be disabled and so this should never increment. + */ + spin_lock_irqsave(&pmu_lock, flags); + val = armv6_pmcr_read(); + val &= ~mask; + val |= evt; + armv6_pmcr_write(val); + spin_unlock_irqrestore(&pmu_lock, flags); +} + +static void +armv6mpcore_pmu_disable_event(struct hw_perf_event *hwc, + int idx) +{ + unsigned long val, mask, flags, evt = 0; + + if (ARMV6_CYCLE_COUNTER == idx) { + mask = ARMV6_PMCR_CCOUNT_IEN; + } else if (ARMV6_COUNTER0 == idx) { + mask = ARMV6_PMCR_COUNT0_IEN; + } else if (ARMV6_COUNTER1 == idx) { + mask = ARMV6_PMCR_COUNT1_IEN; + } else { + WARN_ONCE(1, "invalid counter number (%d)\n", idx); + return; + } + + /* + * Unlike UP ARMv6, we don't have a way of stopping the counters. We + * simply disable the interrupt reporting. + */ + spin_lock_irqsave(&pmu_lock, flags); + val = armv6_pmcr_read(); + val &= ~mask; + val |= evt; + armv6_pmcr_write(val); + spin_unlock_irqrestore(&pmu_lock, flags); +} + +static const struct arm_pmu armv6pmu = { + .id = ARM_PERF_PMU_ID_V6, + .name = "v6", + .handle_irq = armv6pmu_handle_irq, + .enable = armv6pmu_enable_event, + .disable = armv6pmu_disable_event, + .read_counter = armv6pmu_read_counter, + .write_counter = armv6pmu_write_counter, + .get_event_idx = armv6pmu_get_event_idx, + .start = armv6pmu_start, + .stop = armv6pmu_stop, + .cache_map = &armv6_perf_cache_map, + .event_map = &armv6_perf_map, + .raw_event_mask = 0xFF, + .num_events = 3, + .max_period = (1LLU << 32) - 1, +}; + +const struct arm_pmu *__init armv6pmu_init(void) +{ + return &armv6pmu; +} + +/* + * ARMv6mpcore is almost identical to single core ARMv6 with the exception + * that some of the events have different enumerations and that there is no + * *hack* to stop the programmable counters. To stop the counters we simply + * disable the interrupt reporting and update the event. When unthrottling we + * reset the period and enable the interrupt reporting. + */ +static const struct arm_pmu armv6mpcore_pmu = { + .id = ARM_PERF_PMU_ID_V6MP, + .name = "v6mpcore", + .handle_irq = armv6pmu_handle_irq, + .enable = armv6pmu_enable_event, + .disable = armv6mpcore_pmu_disable_event, + .read_counter = armv6pmu_read_counter, + .write_counter = armv6pmu_write_counter, + .get_event_idx = armv6pmu_get_event_idx, + .start = armv6pmu_start, + .stop = armv6pmu_stop, + .cache_map = &armv6mpcore_perf_cache_map, + .event_map = &armv6mpcore_perf_map, + .raw_event_mask = 0xFF, + .num_events = 3, + .max_period = (1LLU << 32) - 1, +}; + +const struct arm_pmu *__init armv6mpcore_pmu_init(void) +{ + return &armv6mpcore_pmu; +} +#else +const struct arm_pmu *__init armv6pmu_init(void) +{ + return NULL; +} + +const struct arm_pmu *__init armv6mpcore_pmu_init(void) +{ + return NULL; +} +#endif /* CONFIG_CPU_V6 */ diff --git a/arch/arm/kernel/perf_event_v7.c b/arch/arm/kernel/perf_event_v7.c new file mode 100644 index 0000000..4d04239 --- /dev/null +++ b/arch/arm/kernel/perf_event_v7.c @@ -0,0 +1,906 @@ +/* + * ARMv7 Cortex-A8 and Cortex-A9 Performance Events handling code. + * + * ARMv7 support: Jean Pihet + * 2010 (c) MontaVista Software, LLC. + * + * Copied from ARMv6 code, with the low level code inspired + * by the ARMv7 Oprofile code. + * + * Cortex-A8 has up to 4 configurable performance counters and + * a single cycle counter. + * Cortex-A9 has up to 31 configurable performance counters and + * a single cycle counter. + * + * All counters can be enabled/disabled and IRQ masked separately. The cycle + * counter and all 4 performance counters together can be reset separately. + */ + +#ifdef CONFIG_CPU_V7 +/* Common ARMv7 event types */ +enum armv7_perf_types { + ARMV7_PERFCTR_PMNC_SW_INCR = 0x00, + ARMV7_PERFCTR_IFETCH_MISS = 0x01, + ARMV7_PERFCTR_ITLB_MISS = 0x02, + ARMV7_PERFCTR_DCACHE_REFILL = 0x03, + ARMV7_PERFCTR_DCACHE_ACCESS = 0x04, + ARMV7_PERFCTR_DTLB_REFILL = 0x05, + ARMV7_PERFCTR_DREAD = 0x06, + ARMV7_PERFCTR_DWRITE = 0x07, + + ARMV7_PERFCTR_EXC_TAKEN = 0x09, + ARMV7_PERFCTR_EXC_EXECUTED = 0x0A, + ARMV7_PERFCTR_CID_WRITE = 0x0B, + /* ARMV7_PERFCTR_PC_WRITE is equivalent to HW_BRANCH_INSTRUCTIONS. + * It counts: + * - all branch instructions, + * - instructions that explicitly write the PC, + * - exception generating instructions. + */ + ARMV7_PERFCTR_PC_WRITE = 0x0C, + ARMV7_PERFCTR_PC_IMM_BRANCH = 0x0D, + ARMV7_PERFCTR_UNALIGNED_ACCESS = 0x0F, + ARMV7_PERFCTR_PC_BRANCH_MIS_PRED = 0x10, + ARMV7_PERFCTR_CLOCK_CYCLES = 0x11, + + ARMV7_PERFCTR_PC_BRANCH_MIS_USED = 0x12, + + ARMV7_PERFCTR_CPU_CYCLES = 0xFF +}; + +/* ARMv7 Cortex-A8 specific event types */ +enum armv7_a8_perf_types { + ARMV7_PERFCTR_INSTR_EXECUTED = 0x08, + + ARMV7_PERFCTR_PC_PROC_RETURN = 0x0E, + + ARMV7_PERFCTR_WRITE_BUFFER_FULL = 0x40, + ARMV7_PERFCTR_L2_STORE_MERGED = 0x41, + ARMV7_PERFCTR_L2_STORE_BUFF = 0x42, + ARMV7_PERFCTR_L2_ACCESS = 0x43, + ARMV7_PERFCTR_L2_CACH_MISS = 0x44, + ARMV7_PERFCTR_AXI_READ_CYCLES = 0x45, + ARMV7_PERFCTR_AXI_WRITE_CYCLES = 0x46, + ARMV7_PERFCTR_MEMORY_REPLAY = 0x47, + ARMV7_PERFCTR_UNALIGNED_ACCESS_REPLAY = 0x48, + ARMV7_PERFCTR_L1_DATA_MISS = 0x49, + ARMV7_PERFCTR_L1_INST_MISS = 0x4A, + ARMV7_PERFCTR_L1_DATA_COLORING = 0x4B, + ARMV7_PERFCTR_L1_NEON_DATA = 0x4C, + ARMV7_PERFCTR_L1_NEON_CACH_DATA = 0x4D, + ARMV7_PERFCTR_L2_NEON = 0x4E, + ARMV7_PERFCTR_L2_NEON_HIT = 0x4F, + ARMV7_PERFCTR_L1_INST = 0x50, + ARMV7_PERFCTR_PC_RETURN_MIS_PRED = 0x51, + ARMV7_PERFCTR_PC_BRANCH_FAILED = 0x52, + ARMV7_PERFCTR_PC_BRANCH_TAKEN = 0x53, + ARMV7_PERFCTR_PC_BRANCH_EXECUTED = 0x54, + ARMV7_PERFCTR_OP_EXECUTED = 0x55, + ARMV7_PERFCTR_CYCLES_INST_STALL = 0x56, + ARMV7_PERFCTR_CYCLES_INST = 0x57, + ARMV7_PERFCTR_CYCLES_NEON_DATA_STALL = 0x58, + ARMV7_PERFCTR_CYCLES_NEON_INST_STALL = 0x59, + ARMV7_PERFCTR_NEON_CYCLES = 0x5A, + + ARMV7_PERFCTR_PMU0_EVENTS = 0x70, + ARMV7_PERFCTR_PMU1_EVENTS = 0x71, + ARMV7_PERFCTR_PMU_EVENTS = 0x72, +}; + +/* ARMv7 Cortex-A9 specific event types */ +enum armv7_a9_perf_types { + ARMV7_PERFCTR_JAVA_HW_BYTECODE_EXEC = 0x40, + ARMV7_PERFCTR_JAVA_SW_BYTECODE_EXEC = 0x41, + ARMV7_PERFCTR_JAZELLE_BRANCH_EXEC = 0x42, + + ARMV7_PERFCTR_COHERENT_LINE_MISS = 0x50, + ARMV7_PERFCTR_COHERENT_LINE_HIT = 0x51, + + ARMV7_PERFCTR_ICACHE_DEP_STALL_CYCLES = 0x60, + ARMV7_PERFCTR_DCACHE_DEP_STALL_CYCLES = 0x61, + ARMV7_PERFCTR_TLB_MISS_DEP_STALL_CYCLES = 0x62, + ARMV7_PERFCTR_STREX_EXECUTED_PASSED = 0x63, + ARMV7_PERFCTR_STREX_EXECUTED_FAILED = 0x64, + ARMV7_PERFCTR_DATA_EVICTION = 0x65, + ARMV7_PERFCTR_ISSUE_STAGE_NO_INST = 0x66, + ARMV7_PERFCTR_ISSUE_STAGE_EMPTY = 0x67, + ARMV7_PERFCTR_INST_OUT_OF_RENAME_STAGE = 0x68, + + ARMV7_PERFCTR_PREDICTABLE_FUNCT_RETURNS = 0x6E, + + ARMV7_PERFCTR_MAIN_UNIT_EXECUTED_INST = 0x70, + ARMV7_PERFCTR_SECOND_UNIT_EXECUTED_INST = 0x71, + ARMV7_PERFCTR_LD_ST_UNIT_EXECUTED_INST = 0x72, + ARMV7_PERFCTR_FP_EXECUTED_INST = 0x73, + ARMV7_PERFCTR_NEON_EXECUTED_INST = 0x74, + + ARMV7_PERFCTR_PLD_FULL_DEP_STALL_CYCLES = 0x80, + ARMV7_PERFCTR_DATA_WR_DEP_STALL_CYCLES = 0x81, + ARMV7_PERFCTR_ITLB_MISS_DEP_STALL_CYCLES = 0x82, + ARMV7_PERFCTR_DTLB_MISS_DEP_STALL_CYCLES = 0x83, + ARMV7_PERFCTR_MICRO_ITLB_MISS_DEP_STALL_CYCLES = 0x84, + ARMV7_PERFCTR_MICRO_DTLB_MISS_DEP_STALL_CYCLES = 0x85, + ARMV7_PERFCTR_DMB_DEP_STALL_CYCLES = 0x86, + + ARMV7_PERFCTR_INTGR_CLK_ENABLED_CYCLES = 0x8A, + ARMV7_PERFCTR_DATA_ENGINE_CLK_EN_CYCLES = 0x8B, + + ARMV7_PERFCTR_ISB_INST = 0x90, + ARMV7_PERFCTR_DSB_INST = 0x91, + ARMV7_PERFCTR_DMB_INST = 0x92, + ARMV7_PERFCTR_EXT_INTERRUPTS = 0x93, + + ARMV7_PERFCTR_PLE_CACHE_LINE_RQST_COMPLETED = 0xA0, + ARMV7_PERFCTR_PLE_CACHE_LINE_RQST_SKIPPED = 0xA1, + ARMV7_PERFCTR_PLE_FIFO_FLUSH = 0xA2, + ARMV7_PERFCTR_PLE_RQST_COMPLETED = 0xA3, + ARMV7_PERFCTR_PLE_FIFO_OVERFLOW = 0xA4, + ARMV7_PERFCTR_PLE_RQST_PROG = 0xA5 +}; + +/* + * Cortex-A8 HW events mapping + * + * The hardware events that we support. We do support cache operations but + * we have harvard caches and no way to combine instruction and data + * accesses/misses in hardware. + */ +static const unsigned armv7_a8_perf_map[PERF_COUNT_HW_MAX] = { + [PERF_COUNT_HW_CPU_CYCLES] = ARMV7_PERFCTR_CPU_CYCLES, + [PERF_COUNT_HW_INSTRUCTIONS] = ARMV7_PERFCTR_INSTR_EXECUTED, + [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED, + [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED, + [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV7_PERFCTR_PC_WRITE, + [PERF_COUNT_HW_BRANCH_MISSES] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, + [PERF_COUNT_HW_BUS_CYCLES] = ARMV7_PERFCTR_CLOCK_CYCLES, +}; + +static const unsigned armv7_a8_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] + [PERF_COUNT_HW_CACHE_OP_MAX] + [PERF_COUNT_HW_CACHE_RESULT_MAX] = { + [C(L1D)] = { + /* + * The performance counters don't differentiate between read + * and write accesses/misses so this isn't strictly correct, + * but it's the best we can do. Writes and reads get + * combined. + */ + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS, + [C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS, + [C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + }, + [C(L1I)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_INST, + [C(RESULT_MISS)] = ARMV7_PERFCTR_L1_INST_MISS, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_INST, + [C(RESULT_MISS)] = ARMV7_PERFCTR_L1_INST_MISS, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + }, + [C(LL)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L2_ACCESS, + [C(RESULT_MISS)] = ARMV7_PERFCTR_L2_CACH_MISS, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L2_ACCESS, + [C(RESULT_MISS)] = ARMV7_PERFCTR_L2_CACH_MISS, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + }, + [C(DTLB)] = { + /* + * Only ITLB misses and DTLB refills are supported. + * If users want the DTLB refills misses a raw counter + * must be used. + */ + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + }, + [C(ITLB)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + }, + [C(BPU)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE, + [C(RESULT_MISS)] + = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE, + [C(RESULT_MISS)] + = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + }, +}; + +/* + * Cortex-A9 HW events mapping + */ +static const unsigned armv7_a9_perf_map[PERF_COUNT_HW_MAX] = { + [PERF_COUNT_HW_CPU_CYCLES] = ARMV7_PERFCTR_CPU_CYCLES, + [PERF_COUNT_HW_INSTRUCTIONS] = + ARMV7_PERFCTR_INST_OUT_OF_RENAME_STAGE, + [PERF_COUNT_HW_CACHE_REFERENCES] = ARMV7_PERFCTR_COHERENT_LINE_HIT, + [PERF_COUNT_HW_CACHE_MISSES] = ARMV7_PERFCTR_COHERENT_LINE_MISS, + [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV7_PERFCTR_PC_WRITE, + [PERF_COUNT_HW_BRANCH_MISSES] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, + [PERF_COUNT_HW_BUS_CYCLES] = ARMV7_PERFCTR_CLOCK_CYCLES, +}; + +static const unsigned armv7_a9_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] + [PERF_COUNT_HW_CACHE_OP_MAX] + [PERF_COUNT_HW_CACHE_RESULT_MAX] = { + [C(L1D)] = { + /* + * The performance counters don't differentiate between read + * and write accesses/misses so this isn't strictly correct, + * but it's the best we can do. Writes and reads get + * combined. + */ + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS, + [C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS, + [C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + }, + [C(L1I)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = ARMV7_PERFCTR_IFETCH_MISS, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = ARMV7_PERFCTR_IFETCH_MISS, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + }, + [C(LL)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + }, + [C(DTLB)] = { + /* + * Only ITLB misses and DTLB refills are supported. + * If users want the DTLB refills misses a raw counter + * must be used. + */ + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + }, + [C(ITLB)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + }, + [C(BPU)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE, + [C(RESULT_MISS)] + = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE, + [C(RESULT_MISS)] + = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + }, +}; + +/* + * Perf Events counters + */ +enum armv7_counters { + ARMV7_CYCLE_COUNTER = 1, /* Cycle counter */ + ARMV7_COUNTER0 = 2, /* First event counter */ +}; + +/* + * The cycle counter is ARMV7_CYCLE_COUNTER. + * The first event counter is ARMV7_COUNTER0. + * The last event counter is (ARMV7_COUNTER0 + armpmu->num_events - 1). + */ +#define ARMV7_COUNTER_LAST (ARMV7_COUNTER0 + armpmu->num_events - 1) + +/* + * ARMv7 low level PMNC access + */ + +/* + * Per-CPU PMNC: config reg + */ +#define ARMV7_PMNC_E (1 << 0) /* Enable all counters */ +#define ARMV7_PMNC_P (1 << 1) /* Reset all counters */ +#define ARMV7_PMNC_C (1 << 2) /* Cycle counter reset */ +#define ARMV7_PMNC_D (1 << 3) /* CCNT counts every 64th cpu cycle */ +#define ARMV7_PMNC_X (1 << 4) /* Export to ETM */ +#define ARMV7_PMNC_DP (1 << 5) /* Disable CCNT if non-invasive debug*/ +#define ARMV7_PMNC_N_SHIFT 11 /* Number of counters supported */ +#define ARMV7_PMNC_N_MASK 0x1f +#define ARMV7_PMNC_MASK 0x3f /* Mask for writable bits */ + +/* + * Available counters + */ +#define ARMV7_CNT0 0 /* First event counter */ +#define ARMV7_CCNT 31 /* Cycle counter */ + +/* Perf Event to low level counters mapping */ +#define ARMV7_EVENT_CNT_TO_CNTx (ARMV7_COUNTER0 - ARMV7_CNT0) + +/* + * CNTENS: counters enable reg + */ +#define ARMV7_CNTENS_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx)) +#define ARMV7_CNTENS_C (1 << ARMV7_CCNT) + +/* + * CNTENC: counters disable reg + */ +#define ARMV7_CNTENC_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx)) +#define ARMV7_CNTENC_C (1 << ARMV7_CCNT) + +/* + * INTENS: counters overflow interrupt enable reg + */ +#define ARMV7_INTENS_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx)) +#define ARMV7_INTENS_C (1 << ARMV7_CCNT) + +/* + * INTENC: counters overflow interrupt disable reg + */ +#define ARMV7_INTENC_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx)) +#define ARMV7_INTENC_C (1 << ARMV7_CCNT) + +/* + * EVTSEL: Event selection reg + */ +#define ARMV7_EVTSEL_MASK 0xff /* Mask for writable bits */ + +/* + * SELECT: Counter selection reg + */ +#define ARMV7_SELECT_MASK 0x1f /* Mask for writable bits */ + +/* + * FLAG: counters overflow flag status reg + */ +#define ARMV7_FLAG_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx)) +#define ARMV7_FLAG_C (1 << ARMV7_CCNT) +#define ARMV7_FLAG_MASK 0xffffffff /* Mask for writable bits */ +#define ARMV7_OVERFLOWED_MASK ARMV7_FLAG_MASK + +static inline unsigned long armv7_pmnc_read(void) +{ + u32 val; + asm volatile("mrc p15, 0, %0, c9, c12, 0" : "=r"(val)); + return val; +} + +static inline void armv7_pmnc_write(unsigned long val) +{ + val &= ARMV7_PMNC_MASK; + asm volatile("mcr p15, 0, %0, c9, c12, 0" : : "r"(val)); +} + +static inline int armv7_pmnc_has_overflowed(unsigned long pmnc) +{ + return pmnc & ARMV7_OVERFLOWED_MASK; +} + +static inline int armv7_pmnc_counter_has_overflowed(unsigned long pmnc, + enum armv7_counters counter) +{ + int ret = 0; + + if (counter == ARMV7_CYCLE_COUNTER) + ret = pmnc & ARMV7_FLAG_C; + else if ((counter >= ARMV7_COUNTER0) && (counter <= ARMV7_COUNTER_LAST)) + ret = pmnc & ARMV7_FLAG_P(counter); + else + pr_err("CPU%u checking wrong counter %d overflow status\n", + smp_processor_id(), counter); + + return ret; +} + +static inline int armv7_pmnc_select_counter(unsigned int idx) +{ + u32 val; + + if ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST)) { + pr_err("CPU%u selecting wrong PMNC counter" + " %d\n", smp_processor_id(), idx); + return -1; + } + + val = (idx - ARMV7_EVENT_CNT_TO_CNTx) & ARMV7_SELECT_MASK; + asm volatile("mcr p15, 0, %0, c9, c12, 5" : : "r" (val)); + + return idx; +} + +static inline u32 armv7pmu_read_counter(int idx) +{ + unsigned long value = 0; + + if (idx == ARMV7_CYCLE_COUNTER) + asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r" (value)); + else if ((idx >= ARMV7_COUNTER0) && (idx <= ARMV7_COUNTER_LAST)) { + if (armv7_pmnc_select_counter(idx) == idx) + asm volatile("mrc p15, 0, %0, c9, c13, 2" + : "=r" (value)); + } else + pr_err("CPU%u reading wrong counter %d\n", + smp_processor_id(), idx); + + return value; +} + +static inline void armv7pmu_write_counter(int idx, u32 value) +{ + if (idx == ARMV7_CYCLE_COUNTER) + asm volatile("mcr p15, 0, %0, c9, c13, 0" : : "r" (value)); + else if ((idx >= ARMV7_COUNTER0) && (idx <= ARMV7_COUNTER_LAST)) { + if (armv7_pmnc_select_counter(idx) == idx) + asm volatile("mcr p15, 0, %0, c9, c13, 2" + : : "r" (value)); + } else + pr_err("CPU%u writing wrong counter %d\n", + smp_processor_id(), idx); +} + +static inline void armv7_pmnc_write_evtsel(unsigned int idx, u32 val) +{ + if (armv7_pmnc_select_counter(idx) == idx) { + val &= ARMV7_EVTSEL_MASK; + asm volatile("mcr p15, 0, %0, c9, c13, 1" : : "r" (val)); + } +} + +static inline u32 armv7_pmnc_enable_counter(unsigned int idx) +{ + u32 val; + + if ((idx != ARMV7_CYCLE_COUNTER) && + ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) { + pr_err("CPU%u enabling wrong PMNC counter" + " %d\n", smp_processor_id(), idx); + return -1; + } + + if (idx == ARMV7_CYCLE_COUNTER) + val = ARMV7_CNTENS_C; + else + val = ARMV7_CNTENS_P(idx); + + asm volatile("mcr p15, 0, %0, c9, c12, 1" : : "r" (val)); + + return idx; +} + +static inline u32 armv7_pmnc_disable_counter(unsigned int idx) +{ + u32 val; + + + if ((idx != ARMV7_CYCLE_COUNTER) && + ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) { + pr_err("CPU%u disabling wrong PMNC counter" + " %d\n", smp_processor_id(), idx); + return -1; + } + + if (idx == ARMV7_CYCLE_COUNTER) + val = ARMV7_CNTENC_C; + else + val = ARMV7_CNTENC_P(idx); + + asm volatile("mcr p15, 0, %0, c9, c12, 2" : : "r" (val)); + + return idx; +} + +static inline u32 armv7_pmnc_enable_intens(unsigned int idx) +{ + u32 val; + + if ((idx != ARMV7_CYCLE_COUNTER) && + ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) { + pr_err("CPU%u enabling wrong PMNC counter" + " interrupt enable %d\n", smp_processor_id(), idx); + return -1; + } + + if (idx == ARMV7_CYCLE_COUNTER) + val = ARMV7_INTENS_C; + else + val = ARMV7_INTENS_P(idx); + + asm volatile("mcr p15, 0, %0, c9, c14, 1" : : "r" (val)); + + return idx; +} + +static inline u32 armv7_pmnc_disable_intens(unsigned int idx) +{ + u32 val; + + if ((idx != ARMV7_CYCLE_COUNTER) && + ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) { + pr_err("CPU%u disabling wrong PMNC counter" + " interrupt enable %d\n", smp_processor_id(), idx); + return -1; + } + + if (idx == ARMV7_CYCLE_COUNTER) + val = ARMV7_INTENC_C; + else + val = ARMV7_INTENC_P(idx); + + asm volatile("mcr p15, 0, %0, c9, c14, 2" : : "r" (val)); + + return idx; +} + +static inline u32 armv7_pmnc_getreset_flags(void) +{ + u32 val; + + /* Read */ + asm volatile("mrc p15, 0, %0, c9, c12, 3" : "=r" (val)); + + /* Write to clear flags */ + val &= ARMV7_FLAG_MASK; + asm volatile("mcr p15, 0, %0, c9, c12, 3" : : "r" (val)); + + return val; +} + +#ifdef DEBUG +static void armv7_pmnc_dump_regs(void) +{ + u32 val; + unsigned int cnt; + + printk(KERN_INFO "PMNC registers dump:\n"); + + asm volatile("mrc p15, 0, %0, c9, c12, 0" : "=r" (val)); + printk(KERN_INFO "PMNC =0x%08x\n", val); + + asm volatile("mrc p15, 0, %0, c9, c12, 1" : "=r" (val)); + printk(KERN_INFO "CNTENS=0x%08x\n", val); + + asm volatile("mrc p15, 0, %0, c9, c14, 1" : "=r" (val)); + printk(KERN_INFO "INTENS=0x%08x\n", val); + + asm volatile("mrc p15, 0, %0, c9, c12, 3" : "=r" (val)); + printk(KERN_INFO "FLAGS =0x%08x\n", val); + + asm volatile("mrc p15, 0, %0, c9, c12, 5" : "=r" (val)); + printk(KERN_INFO "SELECT=0x%08x\n", val); + + asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r" (val)); + printk(KERN_INFO "CCNT =0x%08x\n", val); + + for (cnt = ARMV7_COUNTER0; cnt < ARMV7_COUNTER_LAST; cnt++) { + armv7_pmnc_select_counter(cnt); + asm volatile("mrc p15, 0, %0, c9, c13, 2" : "=r" (val)); + printk(KERN_INFO "CNT[%d] count =0x%08x\n", + cnt-ARMV7_EVENT_CNT_TO_CNTx, val); + asm volatile("mrc p15, 0, %0, c9, c13, 1" : "=r" (val)); + printk(KERN_INFO "CNT[%d] evtsel=0x%08x\n", + cnt-ARMV7_EVENT_CNT_TO_CNTx, val); + } +} +#endif + +void armv7pmu_enable_event(struct hw_perf_event *hwc, int idx) +{ + unsigned long flags; + + /* + * Enable counter and interrupt, and set the counter to count + * the event that we're interested in. + */ + spin_lock_irqsave(&pmu_lock, flags); + + /* + * Disable counter + */ + armv7_pmnc_disable_counter(idx); + + /* + * Set event (if destined for PMNx counters) + * We don't need to set the event if it's a cycle count + */ + if (idx != ARMV7_CYCLE_COUNTER) + armv7_pmnc_write_evtsel(idx, hwc->config_base); + + /* + * Enable interrupt for this counter + */ + armv7_pmnc_enable_intens(idx); + + /* + * Enable counter + */ + armv7_pmnc_enable_counter(idx); + + spin_unlock_irqrestore(&pmu_lock, flags); +} + +static void armv7pmu_disable_event(struct hw_perf_event *hwc, int idx) +{ + unsigned long flags; + + /* + * Disable counter and interrupt + */ + spin_lock_irqsave(&pmu_lock, flags); + + /* + * Disable counter + */ + armv7_pmnc_disable_counter(idx); + + /* + * Disable interrupt for this counter + */ + armv7_pmnc_disable_intens(idx); + + spin_unlock_irqrestore(&pmu_lock, flags); +} + +static irqreturn_t armv7pmu_handle_irq(int irq_num, void *dev) +{ + unsigned long pmnc; + struct perf_sample_data data; + struct cpu_hw_events *cpuc; + struct pt_regs *regs; + int idx; + + /* + * Get and reset the IRQ flags + */ + pmnc = armv7_pmnc_getreset_flags(); + + /* + * Did an overflow occur? + */ + if (!armv7_pmnc_has_overflowed(pmnc)) + return IRQ_NONE; + + /* + * Handle the counter(s) overflow(s) + */ + regs = get_irq_regs(); + + perf_sample_data_init(&data, 0); + + cpuc = &__get_cpu_var(cpu_hw_events); + for (idx = 0; idx <= armpmu->num_events; ++idx) { + struct perf_event *event = cpuc->events[idx]; + struct hw_perf_event *hwc; + + if (!test_bit(idx, cpuc->active_mask)) + continue; + + /* + * We have a single interrupt for all counters. Check that + * each counter has overflowed before we process it. + */ + if (!armv7_pmnc_counter_has_overflowed(pmnc, idx)) + continue; + + hwc = &event->hw; + armpmu_event_update(event, hwc, idx); + data.period = event->hw.last_period; + if (!armpmu_event_set_period(event, hwc, idx)) + continue; + + if (perf_event_overflow(event, 0, &data, regs)) + armpmu->disable(hwc, idx); + } + + /* + * Handle the pending perf events. + * + * Note: this call *must* be run with interrupts disabled. For + * platforms that can have the PMU interrupts raised as an NMI, this + * will not work. + */ + irq_work_run(); + + return IRQ_HANDLED; +} + +static void armv7pmu_start(void) +{ + unsigned long flags; + + spin_lock_irqsave(&pmu_lock, flags); + /* Enable all counters */ + armv7_pmnc_write(armv7_pmnc_read() | ARMV7_PMNC_E); + spin_unlock_irqrestore(&pmu_lock, flags); +} + +static void armv7pmu_stop(void) +{ + unsigned long flags; + + spin_lock_irqsave(&pmu_lock, flags); + /* Disable all counters */ + armv7_pmnc_write(armv7_pmnc_read() & ~ARMV7_PMNC_E); + spin_unlock_irqrestore(&pmu_lock, flags); +} + +static int armv7pmu_get_event_idx(struct cpu_hw_events *cpuc, + struct hw_perf_event *event) +{ + int idx; + + /* Always place a cycle counter into the cycle counter. */ + if (event->config_base == ARMV7_PERFCTR_CPU_CYCLES) { + if (test_and_set_bit(ARMV7_CYCLE_COUNTER, cpuc->used_mask)) + return -EAGAIN; + + return ARMV7_CYCLE_COUNTER; + } else { + /* + * For anything other than a cycle counter, try and use + * the events counters + */ + for (idx = ARMV7_COUNTER0; idx <= armpmu->num_events; ++idx) { + if (!test_and_set_bit(idx, cpuc->used_mask)) + return idx; + } + + /* The counters are all in use. */ + return -EAGAIN; + } +} + +static struct arm_pmu armv7pmu = { + .handle_irq = armv7pmu_handle_irq, + .enable = armv7pmu_enable_event, + .disable = armv7pmu_disable_event, + .read_counter = armv7pmu_read_counter, + .write_counter = armv7pmu_write_counter, + .get_event_idx = armv7pmu_get_event_idx, + .start = armv7pmu_start, + .stop = armv7pmu_stop, + .raw_event_mask = 0xFF, + .max_period = (1LLU << 32) - 1, +}; + +static u32 __init armv7_reset_read_pmnc(void) +{ + u32 nb_cnt; + + /* Initialize & Reset PMNC: C and P bits */ + armv7_pmnc_write(ARMV7_PMNC_P | ARMV7_PMNC_C); + + /* Read the nb of CNTx counters supported from PMNC */ + nb_cnt = (armv7_pmnc_read() >> ARMV7_PMNC_N_SHIFT) & ARMV7_PMNC_N_MASK; + + /* Add the CPU cycles counter and return */ + return nb_cnt + 1; +} + +const struct arm_pmu *__init armv7_a8_pmu_init(void) +{ + armv7pmu.id = ARM_PERF_PMU_ID_CA8; + armv7pmu.name = "ARMv7 Cortex-A8"; + armv7pmu.cache_map = &armv7_a8_perf_cache_map; + armv7pmu.event_map = &armv7_a8_perf_map; + armv7pmu.num_events = armv7_reset_read_pmnc(); + return &armv7pmu; +} + +const struct arm_pmu *__init armv7_a9_pmu_init(void) +{ + armv7pmu.id = ARM_PERF_PMU_ID_CA9; + armv7pmu.name = "ARMv7 Cortex-A9"; + armv7pmu.cache_map = &armv7_a9_perf_cache_map; + armv7pmu.event_map = &armv7_a9_perf_map; + armv7pmu.num_events = armv7_reset_read_pmnc(); + return &armv7pmu; +} +#else +const struct arm_pmu *__init armv7_a8_pmu_init(void) +{ + return NULL; +} + +const struct arm_pmu *__init armv7_a9_pmu_init(void) +{ + return NULL; +} +#endif /* CONFIG_CPU_V7 */ diff --git a/arch/arm/kernel/perf_event_xscale.c b/arch/arm/kernel/perf_event_xscale.c new file mode 100644 index 0000000..4e95927 --- /dev/null +++ b/arch/arm/kernel/perf_event_xscale.c @@ -0,0 +1,807 @@ +/* + * ARMv5 [xscale] Performance counter handling code. + * + * Copyright (C) 2010, ARM Ltd., Will Deacon + * + * Based on the previous xscale OProfile code. + * + * There are two variants of the xscale PMU that we support: + * - xscale1pmu: 2 event counters and a cycle counter + * - xscale2pmu: 4 event counters and a cycle counter + * The two variants share event definitions, but have different + * PMU structures. + */ + +#ifdef CONFIG_CPU_XSCALE +enum xscale_perf_types { + XSCALE_PERFCTR_ICACHE_MISS = 0x00, + XSCALE_PERFCTR_ICACHE_NO_DELIVER = 0x01, + XSCALE_PERFCTR_DATA_STALL = 0x02, + XSCALE_PERFCTR_ITLB_MISS = 0x03, + XSCALE_PERFCTR_DTLB_MISS = 0x04, + XSCALE_PERFCTR_BRANCH = 0x05, + XSCALE_PERFCTR_BRANCH_MISS = 0x06, + XSCALE_PERFCTR_INSTRUCTION = 0x07, + XSCALE_PERFCTR_DCACHE_FULL_STALL = 0x08, + XSCALE_PERFCTR_DCACHE_FULL_STALL_CONTIG = 0x09, + XSCALE_PERFCTR_DCACHE_ACCESS = 0x0A, + XSCALE_PERFCTR_DCACHE_MISS = 0x0B, + XSCALE_PERFCTR_DCACHE_WRITE_BACK = 0x0C, + XSCALE_PERFCTR_PC_CHANGED = 0x0D, + XSCALE_PERFCTR_BCU_REQUEST = 0x10, + XSCALE_PERFCTR_BCU_FULL = 0x11, + XSCALE_PERFCTR_BCU_DRAIN = 0x12, + XSCALE_PERFCTR_BCU_ECC_NO_ELOG = 0x14, + XSCALE_PERFCTR_BCU_1_BIT_ERR = 0x15, + XSCALE_PERFCTR_RMW = 0x16, + /* XSCALE_PERFCTR_CCNT is not hardware defined */ + XSCALE_PERFCTR_CCNT = 0xFE, + XSCALE_PERFCTR_UNUSED = 0xFF, +}; + +enum xscale_counters { + XSCALE_CYCLE_COUNTER = 1, + XSCALE_COUNTER0, + XSCALE_COUNTER1, + XSCALE_COUNTER2, + XSCALE_COUNTER3, +}; + +static const unsigned xscale_perf_map[PERF_COUNT_HW_MAX] = { + [PERF_COUNT_HW_CPU_CYCLES] = XSCALE_PERFCTR_CCNT, + [PERF_COUNT_HW_INSTRUCTIONS] = XSCALE_PERFCTR_INSTRUCTION, + [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED, + [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED, + [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = XSCALE_PERFCTR_BRANCH, + [PERF_COUNT_HW_BRANCH_MISSES] = XSCALE_PERFCTR_BRANCH_MISS, + [PERF_COUNT_HW_BUS_CYCLES] = HW_OP_UNSUPPORTED, +}; + +static const unsigned xscale_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] + [PERF_COUNT_HW_CACHE_OP_MAX] + [PERF_COUNT_HW_CACHE_RESULT_MAX] = { + [C(L1D)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = XSCALE_PERFCTR_DCACHE_ACCESS, + [C(RESULT_MISS)] = XSCALE_PERFCTR_DCACHE_MISS, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = XSCALE_PERFCTR_DCACHE_ACCESS, + [C(RESULT_MISS)] = XSCALE_PERFCTR_DCACHE_MISS, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + }, + [C(L1I)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = XSCALE_PERFCTR_ICACHE_MISS, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = XSCALE_PERFCTR_ICACHE_MISS, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + }, + [C(LL)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + }, + [C(DTLB)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = XSCALE_PERFCTR_DTLB_MISS, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = XSCALE_PERFCTR_DTLB_MISS, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + }, + [C(ITLB)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = XSCALE_PERFCTR_ITLB_MISS, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = XSCALE_PERFCTR_ITLB_MISS, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + }, + [C(BPU)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + }, +}; + +#define XSCALE_PMU_ENABLE 0x001 +#define XSCALE_PMN_RESET 0x002 +#define XSCALE_CCNT_RESET 0x004 +#define XSCALE_PMU_RESET (CCNT_RESET | PMN_RESET) +#define XSCALE_PMU_CNT64 0x008 + +#define XSCALE1_OVERFLOWED_MASK 0x700 +#define XSCALE1_CCOUNT_OVERFLOW 0x400 +#define XSCALE1_COUNT0_OVERFLOW 0x100 +#define XSCALE1_COUNT1_OVERFLOW 0x200 +#define XSCALE1_CCOUNT_INT_EN 0x040 +#define XSCALE1_COUNT0_INT_EN 0x010 +#define XSCALE1_COUNT1_INT_EN 0x020 +#define XSCALE1_COUNT0_EVT_SHFT 12 +#define XSCALE1_COUNT0_EVT_MASK (0xff << XSCALE1_COUNT0_EVT_SHFT) +#define XSCALE1_COUNT1_EVT_SHFT 20 +#define XSCALE1_COUNT1_EVT_MASK (0xff << XSCALE1_COUNT1_EVT_SHFT) + +static inline u32 +xscale1pmu_read_pmnc(void) +{ + u32 val; + asm volatile("mrc p14, 0, %0, c0, c0, 0" : "=r" (val)); + return val; +} + +static inline void +xscale1pmu_write_pmnc(u32 val) +{ + /* upper 4bits and 7, 11 are write-as-0 */ + val &= 0xffff77f; + asm volatile("mcr p14, 0, %0, c0, c0, 0" : : "r" (val)); +} + +static inline int +xscale1_pmnc_counter_has_overflowed(unsigned long pmnc, + enum xscale_counters counter) +{ + int ret = 0; + + switch (counter) { + case XSCALE_CYCLE_COUNTER: + ret = pmnc & XSCALE1_CCOUNT_OVERFLOW; + break; + case XSCALE_COUNTER0: + ret = pmnc & XSCALE1_COUNT0_OVERFLOW; + break; + case XSCALE_COUNTER1: + ret = pmnc & XSCALE1_COUNT1_OVERFLOW; + break; + default: + WARN_ONCE(1, "invalid counter number (%d)\n", counter); + } + + return ret; +} + +static irqreturn_t +xscale1pmu_handle_irq(int irq_num, void *dev) +{ + unsigned long pmnc; + struct perf_sample_data data; + struct cpu_hw_events *cpuc; + struct pt_regs *regs; + int idx; + + /* + * NOTE: there's an A stepping erratum that states if an overflow + * bit already exists and another occurs, the previous + * Overflow bit gets cleared. There's no workaround. + * Fixed in B stepping or later. + */ + pmnc = xscale1pmu_read_pmnc(); + + /* + * Write the value back to clear the overflow flags. Overflow + * flags remain in pmnc for use below. We also disable the PMU + * while we process the interrupt. + */ + xscale1pmu_write_pmnc(pmnc & ~XSCALE_PMU_ENABLE); + + if (!(pmnc & XSCALE1_OVERFLOWED_MASK)) + return IRQ_NONE; + + regs = get_irq_regs(); + + perf_sample_data_init(&data, 0); + + cpuc = &__get_cpu_var(cpu_hw_events); + for (idx = 0; idx <= armpmu->num_events; ++idx) { + struct perf_event *event = cpuc->events[idx]; + struct hw_perf_event *hwc; + + if (!test_bit(idx, cpuc->active_mask)) + continue; + + if (!xscale1_pmnc_counter_has_overflowed(pmnc, idx)) + continue; + + hwc = &event->hw; + armpmu_event_update(event, hwc, idx); + data.period = event->hw.last_period; + if (!armpmu_event_set_period(event, hwc, idx)) + continue; + + if (perf_event_overflow(event, 0, &data, regs)) + armpmu->disable(hwc, idx); + } + + irq_work_run(); + + /* + * Re-enable the PMU. + */ + pmnc = xscale1pmu_read_pmnc() | XSCALE_PMU_ENABLE; + xscale1pmu_write_pmnc(pmnc); + + return IRQ_HANDLED; +} + +static void +xscale1pmu_enable_event(struct hw_perf_event *hwc, int idx) +{ + unsigned long val, mask, evt, flags; + + switch (idx) { + case XSCALE_CYCLE_COUNTER: + mask = 0; + evt = XSCALE1_CCOUNT_INT_EN; + break; + case XSCALE_COUNTER0: + mask = XSCALE1_COUNT0_EVT_MASK; + evt = (hwc->config_base << XSCALE1_COUNT0_EVT_SHFT) | + XSCALE1_COUNT0_INT_EN; + break; + case XSCALE_COUNTER1: + mask = XSCALE1_COUNT1_EVT_MASK; + evt = (hwc->config_base << XSCALE1_COUNT1_EVT_SHFT) | + XSCALE1_COUNT1_INT_EN; + break; + default: + WARN_ONCE(1, "invalid counter number (%d)\n", idx); + return; + } + + spin_lock_irqsave(&pmu_lock, flags); + val = xscale1pmu_read_pmnc(); + val &= ~mask; + val |= evt; + xscale1pmu_write_pmnc(val); + spin_unlock_irqrestore(&pmu_lock, flags); +} + +static void +xscale1pmu_disable_event(struct hw_perf_event *hwc, int idx) +{ + unsigned long val, mask, evt, flags; + + switch (idx) { + case XSCALE_CYCLE_COUNTER: + mask = XSCALE1_CCOUNT_INT_EN; + evt = 0; + break; + case XSCALE_COUNTER0: + mask = XSCALE1_COUNT0_INT_EN | XSCALE1_COUNT0_EVT_MASK; + evt = XSCALE_PERFCTR_UNUSED << XSCALE1_COUNT0_EVT_SHFT; + break; + case XSCALE_COUNTER1: + mask = XSCALE1_COUNT1_INT_EN | XSCALE1_COUNT1_EVT_MASK; + evt = XSCALE_PERFCTR_UNUSED << XSCALE1_COUNT1_EVT_SHFT; + break; + default: + WARN_ONCE(1, "invalid counter number (%d)\n", idx); + return; + } + + spin_lock_irqsave(&pmu_lock, flags); + val = xscale1pmu_read_pmnc(); + val &= ~mask; + val |= evt; + xscale1pmu_write_pmnc(val); + spin_unlock_irqrestore(&pmu_lock, flags); +} + +static int +xscale1pmu_get_event_idx(struct cpu_hw_events *cpuc, + struct hw_perf_event *event) +{ + if (XSCALE_PERFCTR_CCNT == event->config_base) { + if (test_and_set_bit(XSCALE_CYCLE_COUNTER, cpuc->used_mask)) + return -EAGAIN; + + return XSCALE_CYCLE_COUNTER; + } else { + if (!test_and_set_bit(XSCALE_COUNTER1, cpuc->used_mask)) + return XSCALE_COUNTER1; + + if (!test_and_set_bit(XSCALE_COUNTER0, cpuc->used_mask)) + return XSCALE_COUNTER0; + + return -EAGAIN; + } +} + +static void +xscale1pmu_start(void) +{ + unsigned long flags, val; + + spin_lock_irqsave(&pmu_lock, flags); + val = xscale1pmu_read_pmnc(); + val |= XSCALE_PMU_ENABLE; + xscale1pmu_write_pmnc(val); + spin_unlock_irqrestore(&pmu_lock, flags); +} + +static void +xscale1pmu_stop(void) +{ + unsigned long flags, val; + + spin_lock_irqsave(&pmu_lock, flags); + val = xscale1pmu_read_pmnc(); + val &= ~XSCALE_PMU_ENABLE; + xscale1pmu_write_pmnc(val); + spin_unlock_irqrestore(&pmu_lock, flags); +} + +static inline u32 +xscale1pmu_read_counter(int counter) +{ + u32 val = 0; + + switch (counter) { + case XSCALE_CYCLE_COUNTER: + asm volatile("mrc p14, 0, %0, c1, c0, 0" : "=r" (val)); + break; + case XSCALE_COUNTER0: + asm volatile("mrc p14, 0, %0, c2, c0, 0" : "=r" (val)); + break; + case XSCALE_COUNTER1: + asm volatile("mrc p14, 0, %0, c3, c0, 0" : "=r" (val)); + break; + } + + return val; +} + +static inline void +xscale1pmu_write_counter(int counter, u32 val) +{ + switch (counter) { + case XSCALE_CYCLE_COUNTER: + asm volatile("mcr p14, 0, %0, c1, c0, 0" : : "r" (val)); + break; + case XSCALE_COUNTER0: + asm volatile("mcr p14, 0, %0, c2, c0, 0" : : "r" (val)); + break; + case XSCALE_COUNTER1: + asm volatile("mcr p14, 0, %0, c3, c0, 0" : : "r" (val)); + break; + } +} + +static const struct arm_pmu xscale1pmu = { + .id = ARM_PERF_PMU_ID_XSCALE1, + .name = "xscale1", + .handle_irq = xscale1pmu_handle_irq, + .enable = xscale1pmu_enable_event, + .disable = xscale1pmu_disable_event, + .read_counter = xscale1pmu_read_counter, + .write_counter = xscale1pmu_write_counter, + .get_event_idx = xscale1pmu_get_event_idx, + .start = xscale1pmu_start, + .stop = xscale1pmu_stop, + .cache_map = &xscale_perf_cache_map, + .event_map = &xscale_perf_map, + .raw_event_mask = 0xFF, + .num_events = 3, + .max_period = (1LLU << 32) - 1, +}; + +const struct arm_pmu *__init xscale1pmu_init(void) +{ + return &xscale1pmu; +} + +#define XSCALE2_OVERFLOWED_MASK 0x01f +#define XSCALE2_CCOUNT_OVERFLOW 0x001 +#define XSCALE2_COUNT0_OVERFLOW 0x002 +#define XSCALE2_COUNT1_OVERFLOW 0x004 +#define XSCALE2_COUNT2_OVERFLOW 0x008 +#define XSCALE2_COUNT3_OVERFLOW 0x010 +#define XSCALE2_CCOUNT_INT_EN 0x001 +#define XSCALE2_COUNT0_INT_EN 0x002 +#define XSCALE2_COUNT1_INT_EN 0x004 +#define XSCALE2_COUNT2_INT_EN 0x008 +#define XSCALE2_COUNT3_INT_EN 0x010 +#define XSCALE2_COUNT0_EVT_SHFT 0 +#define XSCALE2_COUNT0_EVT_MASK (0xff << XSCALE2_COUNT0_EVT_SHFT) +#define XSCALE2_COUNT1_EVT_SHFT 8 +#define XSCALE2_COUNT1_EVT_MASK (0xff << XSCALE2_COUNT1_EVT_SHFT) +#define XSCALE2_COUNT2_EVT_SHFT 16 +#define XSCALE2_COUNT2_EVT_MASK (0xff << XSCALE2_COUNT2_EVT_SHFT) +#define XSCALE2_COUNT3_EVT_SHFT 24 +#define XSCALE2_COUNT3_EVT_MASK (0xff << XSCALE2_COUNT3_EVT_SHFT) + +static inline u32 +xscale2pmu_read_pmnc(void) +{ + u32 val; + asm volatile("mrc p14, 0, %0, c0, c1, 0" : "=r" (val)); + /* bits 1-2 and 4-23 are read-unpredictable */ + return val & 0xff000009; +} + +static inline void +xscale2pmu_write_pmnc(u32 val) +{ + /* bits 4-23 are write-as-0, 24-31 are write ignored */ + val &= 0xf; + asm volatile("mcr p14, 0, %0, c0, c1, 0" : : "r" (val)); +} + +static inline u32 +xscale2pmu_read_overflow_flags(void) +{ + u32 val; + asm volatile("mrc p14, 0, %0, c5, c1, 0" : "=r" (val)); + return val; +} + +static inline void +xscale2pmu_write_overflow_flags(u32 val) +{ + asm volatile("mcr p14, 0, %0, c5, c1, 0" : : "r" (val)); +} + +static inline u32 +xscale2pmu_read_event_select(void) +{ + u32 val; + asm volatile("mrc p14, 0, %0, c8, c1, 0" : "=r" (val)); + return val; +} + +static inline void +xscale2pmu_write_event_select(u32 val) +{ + asm volatile("mcr p14, 0, %0, c8, c1, 0" : : "r"(val)); +} + +static inline u32 +xscale2pmu_read_int_enable(void) +{ + u32 val; + asm volatile("mrc p14, 0, %0, c4, c1, 0" : "=r" (val)); + return val; +} + +static void +xscale2pmu_write_int_enable(u32 val) +{ + asm volatile("mcr p14, 0, %0, c4, c1, 0" : : "r" (val)); +} + +static inline int +xscale2_pmnc_counter_has_overflowed(unsigned long of_flags, + enum xscale_counters counter) +{ + int ret = 0; + + switch (counter) { + case XSCALE_CYCLE_COUNTER: + ret = of_flags & XSCALE2_CCOUNT_OVERFLOW; + break; + case XSCALE_COUNTER0: + ret = of_flags & XSCALE2_COUNT0_OVERFLOW; + break; + case XSCALE_COUNTER1: + ret = of_flags & XSCALE2_COUNT1_OVERFLOW; + break; + case XSCALE_COUNTER2: + ret = of_flags & XSCALE2_COUNT2_OVERFLOW; + break; + case XSCALE_COUNTER3: + ret = of_flags & XSCALE2_COUNT3_OVERFLOW; + break; + default: + WARN_ONCE(1, "invalid counter number (%d)\n", counter); + } + + return ret; +} + +static irqreturn_t +xscale2pmu_handle_irq(int irq_num, void *dev) +{ + unsigned long pmnc, of_flags; + struct perf_sample_data data; + struct cpu_hw_events *cpuc; + struct pt_regs *regs; + int idx; + + /* Disable the PMU. */ + pmnc = xscale2pmu_read_pmnc(); + xscale2pmu_write_pmnc(pmnc & ~XSCALE_PMU_ENABLE); + + /* Check the overflow flag register. */ + of_flags = xscale2pmu_read_overflow_flags(); + if (!(of_flags & XSCALE2_OVERFLOWED_MASK)) + return IRQ_NONE; + + /* Clear the overflow bits. */ + xscale2pmu_write_overflow_flags(of_flags); + + regs = get_irq_regs(); + + perf_sample_data_init(&data, 0); + + cpuc = &__get_cpu_var(cpu_hw_events); + for (idx = 0; idx <= armpmu->num_events; ++idx) { + struct perf_event *event = cpuc->events[idx]; + struct hw_perf_event *hwc; + + if (!test_bit(idx, cpuc->active_mask)) + continue; + + if (!xscale2_pmnc_counter_has_overflowed(pmnc, idx)) + continue; + + hwc = &event->hw; + armpmu_event_update(event, hwc, idx); + data.period = event->hw.last_period; + if (!armpmu_event_set_period(event, hwc, idx)) + continue; + + if (perf_event_overflow(event, 0, &data, regs)) + armpmu->disable(hwc, idx); + } + + irq_work_run(); + + /* + * Re-enable the PMU. + */ + pmnc = xscale2pmu_read_pmnc() | XSCALE_PMU_ENABLE; + xscale2pmu_write_pmnc(pmnc); + + return IRQ_HANDLED; +} + +static void +xscale2pmu_enable_event(struct hw_perf_event *hwc, int idx) +{ + unsigned long flags, ien, evtsel; + + ien = xscale2pmu_read_int_enable(); + evtsel = xscale2pmu_read_event_select(); + + switch (idx) { + case XSCALE_CYCLE_COUNTER: + ien |= XSCALE2_CCOUNT_INT_EN; + break; + case XSCALE_COUNTER0: + ien |= XSCALE2_COUNT0_INT_EN; + evtsel &= ~XSCALE2_COUNT0_EVT_MASK; + evtsel |= hwc->config_base << XSCALE2_COUNT0_EVT_SHFT; + break; + case XSCALE_COUNTER1: + ien |= XSCALE2_COUNT1_INT_EN; + evtsel &= ~XSCALE2_COUNT1_EVT_MASK; + evtsel |= hwc->config_base << XSCALE2_COUNT1_EVT_SHFT; + break; + case XSCALE_COUNTER2: + ien |= XSCALE2_COUNT2_INT_EN; + evtsel &= ~XSCALE2_COUNT2_EVT_MASK; + evtsel |= hwc->config_base << XSCALE2_COUNT2_EVT_SHFT; + break; + case XSCALE_COUNTER3: + ien |= XSCALE2_COUNT3_INT_EN; + evtsel &= ~XSCALE2_COUNT3_EVT_MASK; + evtsel |= hwc->config_base << XSCALE2_COUNT3_EVT_SHFT; + break; + default: + WARN_ONCE(1, "invalid counter number (%d)\n", idx); + return; + } + + spin_lock_irqsave(&pmu_lock, flags); + xscale2pmu_write_event_select(evtsel); + xscale2pmu_write_int_enable(ien); + spin_unlock_irqrestore(&pmu_lock, flags); +} + +static void +xscale2pmu_disable_event(struct hw_perf_event *hwc, int idx) +{ + unsigned long flags, ien, evtsel; + + ien = xscale2pmu_read_int_enable(); + evtsel = xscale2pmu_read_event_select(); + + switch (idx) { + case XSCALE_CYCLE_COUNTER: + ien &= ~XSCALE2_CCOUNT_INT_EN; + break; + case XSCALE_COUNTER0: + ien &= ~XSCALE2_COUNT0_INT_EN; + evtsel &= ~XSCALE2_COUNT0_EVT_MASK; + evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT0_EVT_SHFT; + break; + case XSCALE_COUNTER1: + ien &= ~XSCALE2_COUNT1_INT_EN; + evtsel &= ~XSCALE2_COUNT1_EVT_MASK; + evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT1_EVT_SHFT; + break; + case XSCALE_COUNTER2: + ien &= ~XSCALE2_COUNT2_INT_EN; + evtsel &= ~XSCALE2_COUNT2_EVT_MASK; + evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT2_EVT_SHFT; + break; + case XSCALE_COUNTER3: + ien &= ~XSCALE2_COUNT3_INT_EN; + evtsel &= ~XSCALE2_COUNT3_EVT_MASK; + evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT3_EVT_SHFT; + break; + default: + WARN_ONCE(1, "invalid counter number (%d)\n", idx); + return; + } + + spin_lock_irqsave(&pmu_lock, flags); + xscale2pmu_write_event_select(evtsel); + xscale2pmu_write_int_enable(ien); + spin_unlock_irqrestore(&pmu_lock, flags); +} + +static int +xscale2pmu_get_event_idx(struct cpu_hw_events *cpuc, + struct hw_perf_event *event) +{ + int idx = xscale1pmu_get_event_idx(cpuc, event); + if (idx >= 0) + goto out; + + if (!test_and_set_bit(XSCALE_COUNTER3, cpuc->used_mask)) + idx = XSCALE_COUNTER3; + else if (!test_and_set_bit(XSCALE_COUNTER2, cpuc->used_mask)) + idx = XSCALE_COUNTER2; +out: + return idx; +} + +static void +xscale2pmu_start(void) +{ + unsigned long flags, val; + + spin_lock_irqsave(&pmu_lock, flags); + val = xscale2pmu_read_pmnc() & ~XSCALE_PMU_CNT64; + val |= XSCALE_PMU_ENABLE; + xscale2pmu_write_pmnc(val); + spin_unlock_irqrestore(&pmu_lock, flags); +} + +static void +xscale2pmu_stop(void) +{ + unsigned long flags, val; + + spin_lock_irqsave(&pmu_lock, flags); + val = xscale2pmu_read_pmnc(); + val &= ~XSCALE_PMU_ENABLE; + xscale2pmu_write_pmnc(val); + spin_unlock_irqrestore(&pmu_lock, flags); +} + +static inline u32 +xscale2pmu_read_counter(int counter) +{ + u32 val = 0; + + switch (counter) { + case XSCALE_CYCLE_COUNTER: + asm volatile("mrc p14, 0, %0, c1, c1, 0" : "=r" (val)); + break; + case XSCALE_COUNTER0: + asm volatile("mrc p14, 0, %0, c0, c2, 0" : "=r" (val)); + break; + case XSCALE_COUNTER1: + asm volatile("mrc p14, 0, %0, c1, c2, 0" : "=r" (val)); + break; + case XSCALE_COUNTER2: + asm volatile("mrc p14, 0, %0, c2, c2, 0" : "=r" (val)); + break; + case XSCALE_COUNTER3: + asm volatile("mrc p14, 0, %0, c3, c2, 0" : "=r" (val)); + break; + } + + return val; +} + +static inline void +xscale2pmu_write_counter(int counter, u32 val) +{ + switch (counter) { + case XSCALE_CYCLE_COUNTER: + asm volatile("mcr p14, 0, %0, c1, c1, 0" : : "r" (val)); + break; + case XSCALE_COUNTER0: + asm volatile("mcr p14, 0, %0, c0, c2, 0" : : "r" (val)); + break; + case XSCALE_COUNTER1: + asm volatile("mcr p14, 0, %0, c1, c2, 0" : : "r" (val)); + break; + case XSCALE_COUNTER2: + asm volatile("mcr p14, 0, %0, c2, c2, 0" : : "r" (val)); + break; + case XSCALE_COUNTER3: + asm volatile("mcr p14, 0, %0, c3, c2, 0" : : "r" (val)); + break; + } +} + +static const struct arm_pmu xscale2pmu = { + .id = ARM_PERF_PMU_ID_XSCALE2, + .name = "xscale2", + .handle_irq = xscale2pmu_handle_irq, + .enable = xscale2pmu_enable_event, + .disable = xscale2pmu_disable_event, + .read_counter = xscale2pmu_read_counter, + .write_counter = xscale2pmu_write_counter, + .get_event_idx = xscale2pmu_get_event_idx, + .start = xscale2pmu_start, + .stop = xscale2pmu_stop, + .cache_map = &xscale_perf_cache_map, + .event_map = &xscale_perf_map, + .raw_event_mask = 0xFF, + .num_events = 5, + .max_period = (1LLU << 32) - 1, +}; + +const struct arm_pmu *__init xscale2pmu_init(void) +{ + return &xscale2pmu; +} +#else +const struct arm_pmu *__init xscale1pmu_init(void) +{ + return NULL; +} + +const struct arm_pmu *__init xscale2pmu_init(void) +{ + return NULL; +} +#endif /* CONFIG_CPU_XSCALE */ -- cgit v0.10.2 From 40cc52440073903f3b7477a3391c4ca0761445d0 Mon Sep 17 00:00:00 2001 From: Russell King Date: Sun, 19 Dec 2010 15:43:34 +0000 Subject: ARM: clockevents: fix IOP clock events initialization Ensure that no interrupt is pending before registering the clock event device, and properly initialize the periodic tick in the ->set_mode callback. Signed-off-by: Russell King diff --git a/arch/arm/plat-iop/time.c b/arch/arm/plat-iop/time.c index 85d3e55..d615e6f 100644 --- a/arch/arm/plat-iop/time.c +++ b/arch/arm/plat-iop/time.c @@ -87,6 +87,7 @@ static void iop_set_mode(enum clock_event_mode mode, case CLOCK_EVT_MODE_PERIODIC: write_tmr0(tmr & ~IOP_TMR_EN); write_tcr0(ticks_per_jiffy - 1); + write_trr0(ticks_per_jiffy - 1); tmr |= (IOP_TMR_RELOAD | IOP_TMR_EN); break; case CLOCK_EVT_MODE_ONESHOT: @@ -152,6 +153,7 @@ void __init iop_init_time(unsigned long tick_rate) * Set up interrupting clockevent timer 0. */ write_tmr0(timer_ctl & ~IOP_TMR_EN); + write_tisr(1); setup_irq(IRQ_IOP_TIMER0, &iop_timer_irq); clockevents_calc_mult_shift(&iop_clockevent, tick_rate, IOP_MIN_RANGE); @@ -161,9 +163,6 @@ void __init iop_init_time(unsigned long tick_rate) clockevent_delta2ns(0xf, &iop_clockevent); iop_clockevent.cpumask = cpumask_of(0); clockevents_register_device(&iop_clockevent); - write_trr0(ticks_per_jiffy - 1); - write_tcr0(ticks_per_jiffy - 1); - write_tmr0(timer_ctl); /* * Set up free-running clocksource timer 1. -- cgit v0.10.2 From 132b16325fae0742a02075894af16197e83febe8 Mon Sep 17 00:00:00 2001 From: Russell King Date: Mon, 13 Dec 2010 13:14:55 +0000 Subject: ARM: AT91: update clock source registration In d7e81c2 (clocksource: Add clocksource_register_hz/khz interface) new interfaces were added which simplify (and optimize) the selection of the divisor shift/mult constants. Switch over to using this new interface. Acked-by: Jean-Christophe PLAGNIOL-VILLARD Signed-off-by: Russell King diff --git a/arch/arm/mach-at91/at91rm9200_time.c b/arch/arm/mach-at91/at91rm9200_time.c index 2500f41..1dd69c8 100644 --- a/arch/arm/mach-at91/at91rm9200_time.c +++ b/arch/arm/mach-at91/at91rm9200_time.c @@ -101,7 +101,6 @@ static struct clocksource clk32k = { .rating = 150, .read = read_clk32k, .mask = CLOCKSOURCE_MASK(20), - .shift = 10, .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; @@ -201,8 +200,7 @@ void __init at91rm9200_timer_init(void) clockevents_register_device(&clkevt); /* register clocksource */ - clk32k.mult = clocksource_hz2mult(AT91_SLOW_CLOCK, clk32k.shift); - clocksource_register(&clk32k); + clocksource_register_hz(&clk32k, AT91_SLOW_CLOCK); } struct sys_timer at91rm9200_timer = { diff --git a/arch/arm/mach-at91/at91sam926x_time.c b/arch/arm/mach-at91/at91sam926x_time.c index 608a632..4ba8549 100644 --- a/arch/arm/mach-at91/at91sam926x_time.c +++ b/arch/arm/mach-at91/at91sam926x_time.c @@ -51,7 +51,6 @@ static struct clocksource pit_clk = { .name = "pit", .rating = 175, .read = read_pit_clk, - .shift = 20, .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; @@ -163,10 +162,9 @@ static void __init at91sam926x_pit_init(void) * Register clocksource. The high order bits of PIV are unused, * so this isn't a 32-bit counter unless we get clockevent irqs. */ - pit_clk.mult = clocksource_hz2mult(pit_rate, pit_clk.shift); bits = 12 /* PICNT */ + ilog2(pit_cycle) /* PIV */; pit_clk.mask = CLOCKSOURCE_MASK(bits); - clocksource_register(&pit_clk); + clocksource_register_hz(&pit_clk, pit_rate); /* Set up irq handler */ setup_irq(AT91_ID_SYS, &at91sam926x_pit_irq); -- cgit v0.10.2 From 6eda51192fb1c767f792e92c67b9a4fd73c1fcba Mon Sep 17 00:00:00 2001 From: Russell King Date: Mon, 13 Dec 2010 13:16:39 +0000 Subject: ARM: bcmring: update clock source registration In d7e81c2 (clocksource: Add clocksource_register_hz/khz interface) new interfaces were added which simplify (and optimize) the selection of the divisor shift/mult constants. Switch over to using this new interface. Acked-By: Scott Branden Acked-By: Jiandong Zheng Signed-off-by: Russell King diff --git a/arch/arm/mach-bcmring/core.c b/arch/arm/mach-bcmring/core.c index d3f959e..b91b1b0 100644 --- a/arch/arm/mach-bcmring/core.c +++ b/arch/arm/mach-bcmring/core.c @@ -294,7 +294,6 @@ static struct clocksource clocksource_bcmring_timer1 = { .rating = 200, .read = bcmring_get_cycles_timer1, .mask = CLOCKSOURCE_MASK(32), - .shift = 20, .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; @@ -303,7 +302,6 @@ static struct clocksource clocksource_bcmring_timer3 = { .rating = 100, .read = bcmring_get_cycles_timer3, .mask = CLOCKSOURCE_MASK(32), - .shift = 20, .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; @@ -316,10 +314,8 @@ static int __init bcmring_clocksource_init(void) writel(TIMER_CTRL_32BIT | TIMER_CTRL_ENABLE | TIMER_CTRL_PERIODIC, TIMER1_VA_BASE + TIMER_CTRL); - clocksource_bcmring_timer1.mult = - clocksource_khz2mult(TIMER1_FREQUENCY_MHZ * 1000, - clocksource_bcmring_timer1.shift); - clocksource_register(&clocksource_bcmring_timer1); + clocksource_register_khz(&clocksource_bcmring_timer1, + TIMER1_FREQUENCY_MHZ * 1000); /* setup timer3 as free-running clocksource */ writel(0, TIMER3_VA_BASE + TIMER_CTRL); @@ -328,10 +324,8 @@ static int __init bcmring_clocksource_init(void) writel(TIMER_CTRL_32BIT | TIMER_CTRL_ENABLE | TIMER_CTRL_PERIODIC, TIMER3_VA_BASE + TIMER_CTRL); - clocksource_bcmring_timer3.mult = - clocksource_khz2mult(TIMER3_FREQUENCY_KHZ, - clocksource_bcmring_timer3.shift); - clocksource_register(&clocksource_bcmring_timer3); + clocksource_register_khz(&clocksource_bcmring_timer3, + TIMER3_FREQUENCY_KHZ); return 0; } -- cgit v0.10.2 From 7c044be50d4bdc33e039a65956b8a927feecaaa3 Mon Sep 17 00:00:00 2001 From: Russell King Date: Mon, 13 Dec 2010 13:17:12 +0000 Subject: ARM: davinci: update clock source registration In d7e81c2 (clocksource: Add clocksource_register_hz/khz interface) new interfaces were added which simplify (and optimize) the selection of the divisor shift/mult constants. Switch over to using this new interface. Acked-by: Kevin Hilman Tested-by: Kevin Hilman Signed-off-by: Russell King diff --git a/arch/arm/mach-davinci/time.c b/arch/arm/mach-davinci/time.c index 0f21c36..c148671 100644 --- a/arch/arm/mach-davinci/time.c +++ b/arch/arm/mach-davinci/time.c @@ -276,7 +276,6 @@ static struct clocksource clocksource_davinci = { .rating = 300, .read = read_cycles, .mask = CLOCKSOURCE_MASK(32), - .shift = 24, .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; @@ -378,10 +377,8 @@ static void __init davinci_timer_init(void) /* setup clocksource */ clocksource_davinci.name = id_to_name[clocksource_id]; - clocksource_davinci.mult = - clocksource_khz2mult(davinci_clock_tick_rate/1000, - clocksource_davinci.shift); - if (clocksource_register(&clocksource_davinci)) + if (clocksource_register_hz(&clocksource_davinci, + davinci_clock_tick_rate)) printk(err, clocksource_davinci.name); /* setup clockevent */ -- cgit v0.10.2 From 08963dab7c6b0ba6a687cb008299eabbbeff7282 Mon Sep 17 00:00:00 2001 From: Russell King Date: Mon, 13 Dec 2010 13:17:24 +0000 Subject: ARM: integrator: update clock source registration In d7e81c2 (clocksource: Add clocksource_register_hz/khz interface) new interfaces were added which simplify (and optimize) the selection of the divisor shift/mult constants. Switch over to using this new interface. Signed-off-by: Russell King diff --git a/arch/arm/mach-integrator/integrator_ap.c b/arch/arm/mach-integrator/integrator_ap.c index 548208f..2774df8 100644 --- a/arch/arm/mach-integrator/integrator_ap.c +++ b/arch/arm/mach-integrator/integrator_ap.c @@ -372,7 +372,6 @@ static struct clocksource clocksource_timersp = { .rating = 200, .read = timersp_read, .mask = CLOCKSOURCE_MASK(16), - .shift = 16, .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; @@ -390,8 +389,7 @@ static void integrator_clocksource_init(u32 khz) writel(ctrl, base + TIMER_CTRL); writel(0xffff, base + TIMER_LOAD); - cs->mult = clocksource_khz2mult(khz, cs->shift); - clocksource_register(cs); + clocksource_register_khz(cs, khz); } static void __iomem * const clkevt_base = (void __iomem *)TIMER1_VA_BASE; -- cgit v0.10.2 From b7c7c50adcf0d9c901542c5db8d795fe226bb454 Mon Sep 17 00:00:00 2001 From: Russell King Date: Mon, 13 Dec 2010 13:17:40 +0000 Subject: ARM: ixp4xx: update clock source registration In d7e81c2 (clocksource: Add clocksource_register_hz/khz interface) new interfaces were added which simplify (and optimize) the selection of the divisor shift/mult constants. Switch over to using this new interface. Tested-by: Mikael Pettersson Signed-off-by: Russell King diff --git a/arch/arm/mach-ixp4xx/common.c b/arch/arm/mach-ixp4xx/common.c index 0bce097..82fc003 100644 --- a/arch/arm/mach-ixp4xx/common.c +++ b/arch/arm/mach-ixp4xx/common.c @@ -411,7 +411,6 @@ static struct clocksource clocksource_ixp4xx = { .rating = 200, .read = ixp4xx_get_cycles, .mask = CLOCKSOURCE_MASK(32), - .shift = 20, .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; @@ -419,10 +418,7 @@ unsigned long ixp4xx_timer_freq = FREQ; EXPORT_SYMBOL(ixp4xx_timer_freq); static void __init ixp4xx_clocksource_init(void) { - clocksource_ixp4xx.mult = - clocksource_hz2mult(ixp4xx_timer_freq, - clocksource_ixp4xx.shift); - clocksource_register(&clocksource_ixp4xx); + clocksource_register_hz(&clocksource_ixp4xx, ixp4xx_timer_freq); } /* -- cgit v0.10.2 From 594cbf2f4ceaaacc706eb1302ff139a61092ec6f Mon Sep 17 00:00:00 2001 From: Russell King Date: Mon, 13 Dec 2010 13:17:52 +0000 Subject: ARM: lpc32xx: update clock source registration In d7e81c2 (clocksource: Add clocksource_register_hz/khz interface) new interfaces were added which simplify (and optimize) the selection of the divisor shift/mult constants. Switch over to using this new interface. Signed-off-by: Russell King diff --git a/arch/arm/mach-lpc32xx/timer.c b/arch/arm/mach-lpc32xx/timer.c index 630dd4a..6162ac3 100644 --- a/arch/arm/mach-lpc32xx/timer.c +++ b/arch/arm/mach-lpc32xx/timer.c @@ -38,7 +38,6 @@ static cycle_t lpc32xx_clksrc_read(struct clocksource *cs) static struct clocksource lpc32xx_clksrc = { .name = "lpc32xx_clksrc", - .shift = 24, .rating = 300, .read = lpc32xx_clksrc_read, .mask = CLOCKSOURCE_MASK(32), @@ -171,9 +170,7 @@ static void __init lpc32xx_timer_init(void) __raw_writel(0, LCP32XX_TIMER_MCR(LPC32XX_TIMER1_BASE)); __raw_writel(LCP32XX_TIMER_CNTR_TCR_EN, LCP32XX_TIMER_TCR(LPC32XX_TIMER1_BASE)); - lpc32xx_clksrc.mult = clocksource_hz2mult(clkrate, - lpc32xx_clksrc.shift); - clocksource_register(&lpc32xx_clksrc); + clocksource_register_hz(&lpc32xx_clksrc, clkrate); } struct sys_timer lpc32xx_timer = { -- cgit v0.10.2 From 5975f496e07e0f1e396939308b815f99907440ea Mon Sep 17 00:00:00 2001 From: Russell King Date: Mon, 13 Dec 2010 13:18:04 +0000 Subject: ARM: mmp: update clock source registration In d7e81c2 (clocksource: Add clocksource_register_hz/khz interface) new interfaces were added which simplify (and optimize) the selection of the divisor shift/mult constants. Switch over to using this new interface. Signed-off-by: Russell King diff --git a/arch/arm/mach-mmp/time.c b/arch/arm/mach-mmp/time.c index 6652819..0c0ab09 100644 --- a/arch/arm/mach-mmp/time.c +++ b/arch/arm/mach-mmp/time.c @@ -146,7 +146,6 @@ static cycle_t clksrc_read(struct clocksource *cs) static struct clocksource cksrc = { .name = "clocksource", - .shift = 20, .rating = 200, .read = clksrc_read, .mask = CLOCKSOURCE_MASK(32), @@ -193,10 +192,8 @@ void __init timer_init(int irq) ckevt.min_delta_ns = clockevent_delta2ns(MIN_DELTA, &ckevt); ckevt.cpumask = cpumask_of(0); - cksrc.mult = clocksource_hz2mult(CLOCK_TICK_RATE, cksrc.shift); - setup_irq(irq, &timer_irq); - clocksource_register(&cksrc); + clocksource_register_hz(&cksrc, CLOCK_TICK_RATE); clockevents_register_device(&ckevt); } -- cgit v0.10.2 From ff9c9772480f06bc7164217b93ebb99fc088539f Mon Sep 17 00:00:00 2001 From: Russell King Date: Mon, 13 Dec 2010 13:18:12 +0000 Subject: ARM: MSM: update clock source registration In d7e81c2 (clocksource: Add clocksource_register_hz/khz interface) new interfaces were added which simplify (and optimize) the selection of the divisor shift/mult constants. Switch over to using this new interface. Tested-By: Jeff Ohlstein Acked-by: David Brown Signed-off-by: Russell King diff --git a/arch/arm/mach-msm/timer.c b/arch/arm/mach-msm/timer.c index 950100f..595be7f 100644 --- a/arch/arm/mach-msm/timer.c +++ b/arch/arm/mach-msm/timer.c @@ -137,7 +137,6 @@ static struct msm_clock msm_clocks[] = { .rating = 200, .read = msm_gpt_read, .mask = CLOCKSOURCE_MASK(32), - .shift = 17, .flags = CLOCK_SOURCE_IS_CONTINUOUS, }, .irq = { @@ -164,7 +163,6 @@ static struct msm_clock msm_clocks[] = { .rating = 300, .read = msm_dgt_read, .mask = CLOCKSOURCE_MASK((32 - MSM_DGT_SHIFT)), - .shift = 24 - MSM_DGT_SHIFT, .flags = CLOCK_SOURCE_IS_CONTINUOUS, }, .irq = { @@ -205,8 +203,7 @@ static void __init msm_timer_init(void) ce->min_delta_ns = clockevent_delta2ns(4, ce); ce->cpumask = cpumask_of(0); - cs->mult = clocksource_hz2mult(clock->freq, cs->shift); - res = clocksource_register(cs); + res = clocksource_register_hz(cs, clock->freq); if (res) printk(KERN_ERR "msm_timer_init: clocksource_register " "failed for %s\n", cs->name); -- cgit v0.10.2 From 4f9272bfe8fca7e6d9e2f44eb78fd2c3ecdf9a0e Mon Sep 17 00:00:00 2001 From: Russell King Date: Mon, 13 Dec 2010 13:18:21 +0000 Subject: ARM: netx: update clock source registration In d7e81c2 (clocksource: Add clocksource_register_hz/khz interface) new interfaces were added which simplify (and optimize) the selection of the divisor shift/mult constants. Switch over to using this new interface. Signed-off-by: Russell King diff --git a/arch/arm/mach-netx/time.c b/arch/arm/mach-netx/time.c index 82801db..f12f22d 100644 --- a/arch/arm/mach-netx/time.c +++ b/arch/arm/mach-netx/time.c @@ -114,7 +114,6 @@ static struct clocksource clocksource_netx = { .rating = 200, .read = netx_get_cycles, .mask = CLOCKSOURCE_MASK(32), - .shift = 20, .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; @@ -151,9 +150,7 @@ static void __init netx_timer_init(void) writel(NETX_GPIO_COUNTER_CTRL_RUN, NETX_GPIO_COUNTER_CTRL(TIMER_CLOCKSOURCE)); - clocksource_netx.mult = - clocksource_hz2mult(CLOCK_TICK_RATE, clocksource_netx.shift); - clocksource_register(&clocksource_netx); + clocksource_register_hz(&clocksource_netx, CLOCK_TICK_RATE); netx_clockevent.mult = div_sc(CLOCK_TICK_RATE, NSEC_PER_SEC, netx_clockevent.shift); -- cgit v0.10.2 From b460ddbbe29a45cc13e3f13314ec9aed7e9412f2 Mon Sep 17 00:00:00 2001 From: Russell King Date: Mon, 13 Dec 2010 13:18:32 +0000 Subject: ARM: ns9xxx: update clock source registration In d7e81c2 (clocksource: Add clocksource_register_hz/khz interface) new interfaces were added which simplify (and optimize) the selection of the divisor shift/mult constants. Switch over to using this new interface. Signed-off-by: Russell King diff --git a/arch/arm/mach-ns9xxx/time-ns9360.c b/arch/arm/mach-ns9xxx/time-ns9360.c index 7728126..9ca32f5 100644 --- a/arch/arm/mach-ns9xxx/time-ns9360.c +++ b/arch/arm/mach-ns9xxx/time-ns9360.c @@ -35,7 +35,6 @@ static struct clocksource ns9360_clocksource = { .rating = 300, .read = ns9360_clocksource_read, .mask = CLOCKSOURCE_MASK(32), - .shift = 20, .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; @@ -148,10 +147,7 @@ static void __init ns9360_timer_init(void) __raw_writel(tc, SYS_TC(TIMER_CLOCKSOURCE)); - ns9360_clocksource.mult = clocksource_hz2mult(ns9360_cpuclock(), - ns9360_clocksource.shift); - - clocksource_register(&ns9360_clocksource); + clocksource_register_hz(&ns9360_clocksource, ns9360_cpuclock()); latch = SH_DIV(ns9360_cpuclock(), HZ, 0); -- cgit v0.10.2 From 8437c25e78c3af2b31bf6c8942494e34e267f446 Mon Sep 17 00:00:00 2001 From: Russell King Date: Mon, 13 Dec 2010 13:18:44 +0000 Subject: ARM: omap: update clock source registration In d7e81c2 (clocksource: Add clocksource_register_hz/khz interface) new interfaces were added which simplify (and optimize) the selection of the divisor shift/mult constants. Switch over to using this new interface. Tested-by: Santosh Shilimkar Signed-off-by: Russell King diff --git a/arch/arm/mach-omap1/time.c b/arch/arm/mach-omap1/time.c index 1be6a21..abb34ff 100644 --- a/arch/arm/mach-omap1/time.c +++ b/arch/arm/mach-omap1/time.c @@ -208,7 +208,6 @@ static struct clocksource clocksource_mpu = { .rating = 300, .read = mpu_read, .mask = CLOCKSOURCE_MASK(32), - .shift = 24, .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; @@ -217,13 +216,10 @@ static void __init omap_init_clocksource(unsigned long rate) static char err[] __initdata = KERN_ERR "%s: can't register clocksource!\n"; - clocksource_mpu.mult - = clocksource_khz2mult(rate/1000, clocksource_mpu.shift); - setup_irq(INT_TIMER2, &omap_mpu_timer2_irq); omap_mpu_timer_start(1, ~0, 1); - if (clocksource_register(&clocksource_mpu)) + if (clocksource_register_hz(&clocksource_mpu, rate)) printk(err, clocksource_mpu.name); } diff --git a/arch/arm/mach-omap2/timer-gp.c b/arch/arm/mach-omap2/timer-gp.c index e13c29e..a7816db 100644 --- a/arch/arm/mach-omap2/timer-gp.c +++ b/arch/arm/mach-omap2/timer-gp.c @@ -195,7 +195,6 @@ static struct clocksource clocksource_gpt = { .rating = 300, .read = clocksource_read_cycles, .mask = CLOCKSOURCE_MASK(32), - .shift = 24, .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; @@ -220,9 +219,7 @@ static void __init omap2_gp_clocksource_init(void) omap_dm_timer_set_load_start(gpt, 1, 0); - clocksource_gpt.mult = - clocksource_khz2mult(tick_rate/1000, clocksource_gpt.shift); - if (clocksource_register(&clocksource_gpt)) + if (clocksource_register_hz(&clocksource_gpt, tick_rate)) printk(err2, clocksource_gpt.name); } #endif diff --git a/arch/arm/plat-omap/counter_32k.c b/arch/arm/plat-omap/counter_32k.c index 155fe43..8f149f5 100644 --- a/arch/arm/plat-omap/counter_32k.c +++ b/arch/arm/plat-omap/counter_32k.c @@ -102,7 +102,6 @@ static struct clocksource clocksource_32k = { .rating = 250, .read = omap_32k_read_dummy, .mask = CLOCKSOURCE_MASK(32), - .shift = 10, .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; @@ -167,12 +166,9 @@ static int __init omap_init_clocksource_32k(void) if (sync_32k_ick) clk_enable(sync_32k_ick); - clocksource_32k.mult = clocksource_hz2mult(32768, - clocksource_32k.shift); - offset_32k = clocksource_32k.read(&clocksource_32k); - if (clocksource_register(&clocksource_32k)) + if (clocksource_register_hz(&clocksource_32k, 32768)) printk(err, clocksource_32k.name); } return 0; -- cgit v0.10.2 From f62ae0ce4369effc432ea25df09c88d7aa08965e Mon Sep 17 00:00:00 2001 From: Russell King Date: Mon, 13 Dec 2010 13:19:11 +0000 Subject: ARM: PXA: update clock source registration In d7e81c2 (clocksource: Add clocksource_register_hz/khz interface) new interfaces were added which simplify (and optimize) the selection of the divisor shift/mult constants. Switch over to using this new interface. Tested-by: Eric Miao Signed-off-by: Russell King diff --git a/arch/arm/mach-pxa/time.c b/arch/arm/mach-pxa/time.c index 293e40a..caf92c0 100644 --- a/arch/arm/mach-pxa/time.c +++ b/arch/arm/mach-pxa/time.c @@ -127,7 +127,6 @@ static struct clocksource cksrc_pxa_oscr0 = { .rating = 200, .read = pxa_read_oscr, .mask = CLOCKSOURCE_MASK(32), - .shift = 20, .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; @@ -155,12 +154,9 @@ static void __init pxa_timer_init(void) clockevent_delta2ns(MIN_OSCR_DELTA * 2, &ckevt_pxa_osmr0) + 1; ckevt_pxa_osmr0.cpumask = cpumask_of(0); - cksrc_pxa_oscr0.mult = - clocksource_hz2mult(clock_tick_rate, cksrc_pxa_oscr0.shift); - setup_irq(IRQ_OST0, &pxa_ost0_irq); - clocksource_register(&cksrc_pxa_oscr0); + clocksource_register_hz(&cksrc_pxa_oscr0, clock_tick_rate); clockevents_register_device(&ckevt_pxa_osmr0); } -- cgit v0.10.2 From 71c874529904818a2888a650425369e0842ff28d Mon Sep 17 00:00:00 2001 From: Russell King Date: Mon, 13 Dec 2010 13:19:22 +0000 Subject: ARM: s5pv310: update clock source registration In d7e81c2 (clocksource: Add clocksource_register_hz/khz interface) new interfaces were added which simplify (and optimize) the selection of the divisor shift/mult constants. Switch over to using this new interface. Acked-by: Kukjin Kim Signed-off-by: Russell King diff --git a/arch/arm/mach-s5pv310/time.c b/arch/arm/mach-s5pv310/time.c index 01b012a..b262d46 100644 --- a/arch/arm/mach-s5pv310/time.c +++ b/arch/arm/mach-s5pv310/time.c @@ -211,7 +211,6 @@ struct clocksource pwm_clocksource = { .rating = 250, .read = s5pv310_pwm4_read, .mask = CLOCKSOURCE_MASK(32), - .shift = 20, .flags = CLOCK_SOURCE_IS_CONTINUOUS , }; @@ -230,10 +229,7 @@ static void __init s5pv310_clocksource_init(void) s5pv310_pwm_init(4, ~0); s5pv310_pwm_start(4, 1); - pwm_clocksource.mult = - clocksource_khz2mult(clock_rate/1000, pwm_clocksource.shift); - - if (clocksource_register(&pwm_clocksource)) + if (clocksource_register_hz(&pwm_clocksource, clock_rate)) panic("%s: can't register clocksource\n", pwm_clocksource.name); } -- cgit v0.10.2 From 2c760b5b52a56e8b92c384dc9611e23fd4980d03 Mon Sep 17 00:00:00 2001 From: Russell King Date: Mon, 13 Dec 2010 13:19:35 +0000 Subject: ARM: SA11x0: update clock source registration In d7e81c2 (clocksource: Add clocksource_register_hz/khz interface) new interfaces were added which simplify (and optimize) the selection of the divisor shift/mult constants. Switch over to using this new interface. Signed-off-by: Russell King diff --git a/arch/arm/mach-sa1100/time.c b/arch/arm/mach-sa1100/time.c index 74b6e0e..96154f5 100644 --- a/arch/arm/mach-sa1100/time.c +++ b/arch/arm/mach-sa1100/time.c @@ -81,7 +81,6 @@ static struct clocksource cksrc_sa1100_oscr = { .rating = 200, .read = sa1100_read_oscr, .mask = CLOCKSOURCE_MASK(32), - .shift = 20, .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; @@ -105,12 +104,9 @@ static void __init sa1100_timer_init(void) clockevent_delta2ns(MIN_OSCR_DELTA * 2, &ckevt_sa1100_osmr0) + 1; ckevt_sa1100_osmr0.cpumask = cpumask_of(0); - cksrc_sa1100_oscr.mult = - clocksource_hz2mult(CLOCK_TICK_RATE, cksrc_sa1100_oscr.shift); - setup_irq(IRQ_OST0, &sa1100_timer_irq); - clocksource_register(&cksrc_sa1100_oscr); + clocksource_register_hz(&cksrc_sa1100_oscr, CLOCK_TICK_RATE); clockevents_register_device(&ckevt_sa1100_osmr0); } -- cgit v0.10.2 From 6b46340a18e7552656097119d121b4b42049dde1 Mon Sep 17 00:00:00 2001 From: Russell King Date: Mon, 13 Dec 2010 13:19:44 +0000 Subject: ARM: tcc8k: update clock source registration In d7e81c2 (clocksource: Add clocksource_register_hz/khz interface) new interfaces were added which simplify (and optimize) the selection of the divisor shift/mult constants. Switch over to using this new interface. Signed-off-by: Russell King diff --git a/arch/arm/mach-tcc8k/time.c b/arch/arm/mach-tcc8k/time.c index 78d0600..e0a8d60 100644 --- a/arch/arm/mach-tcc8k/time.c +++ b/arch/arm/mach-tcc8k/time.c @@ -35,7 +35,6 @@ static struct clocksource clocksource_tcc = { .rating = 200, .read = tcc_get_cycles, .mask = CLOCKSOURCE_MASK(32), - .shift = 28, .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; @@ -103,9 +102,7 @@ static int __init tcc_clockevent_init(struct clk *clock) { unsigned int c = clk_get_rate(clock); - clocksource_tcc.mult = clocksource_hz2mult(c, - clocksource_tcc.shift); - clocksource_register(&clocksource_tcc); + clocksource_register_hz(&clocksource_tcc, c); clockevent_tcc.mult = div_sc(c, NSEC_PER_SEC, clockevent_tcc.shift); -- cgit v0.10.2 From da797478c1ba05a858c7719a02ce0856a5bb69ce Mon Sep 17 00:00:00 2001 From: Russell King Date: Mon, 13 Dec 2010 13:19:55 +0000 Subject: ARM: U300: update clock source registration In d7e81c2 (clocksource: Add clocksource_register_hz/khz interface) new interfaces were added which simplify (and optimize) the selection of the divisor shift/mult constants. Switch over to using this new interface. Acked-by: Linus Walleij Signed-off-by: Russell King diff --git a/arch/arm/mach-u300/timer.c b/arch/arm/mach-u300/timer.c index 3fc4472..377ff7f 100644 --- a/arch/arm/mach-u300/timer.c +++ b/arch/arm/mach-u300/timer.c @@ -412,9 +412,7 @@ static void __init u300_timer_init(void) writel(U300_TIMER_APP_EGPT2_TIMER_ENABLE, U300_TIMER_APP_VBASE + U300_TIMER_APP_EGPT2); - clocksource_calc_mult_shift(&clocksource_u300_1mhz, - rate, APPTIMER_MIN_RANGE); - if (clocksource_register(&clocksource_u300_1mhz)) + if (clocksource_register_hz(&clocksource_u300_1mhz, rate)) printk(KERN_ERR "timer: failed to initialize clock " "source %s\n", clocksource_u300_1mhz.name); -- cgit v0.10.2 From 894cf56b1a64b65360086c2c890c2ae7f257793f Mon Sep 17 00:00:00 2001 From: Russell King Date: Mon, 13 Dec 2010 13:20:06 +0000 Subject: ARM: nuc: update clock source registration In d7e81c2 (clocksource: Add clocksource_register_hz/khz interface) new interfaces were added which simplify (and optimize) the selection of the divisor shift/mult constants. Switch over to using this new interface. Acked-by: Wan zongshun Signed-off-by: Russell King diff --git a/arch/arm/mach-w90x900/time.c b/arch/arm/mach-w90x900/time.c index b80f769..4b089cb 100644 --- a/arch/arm/mach-w90x900/time.c +++ b/arch/arm/mach-w90x900/time.c @@ -153,7 +153,6 @@ static struct clocksource clocksource_nuc900 = { .rating = 200, .read = nuc900_get_cycles, .mask = CLOCKSOURCE_MASK(TDR_SHIFT), - .shift = 10, .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; @@ -176,9 +175,7 @@ static void __init nuc900_clocksource_init(void) val |= (COUNTEN | PERIOD | PRESCALE); __raw_writel(val, REG_TCSR1); - clocksource_nuc900.mult = - clocksource_khz2mult((rate / 1000), clocksource_nuc900.shift); - clocksource_register(&clocksource_nuc900); + clocksource_register_hz(&clocksource_nuc900, rate); } static void __init nuc900_timer_init(void) -- cgit v0.10.2 From d28b116b9239b603f790a5ed6f0c5fe329561b49 Mon Sep 17 00:00:00 2001 From: Russell King Date: Mon, 13 Dec 2010 13:20:23 +0000 Subject: ARM: iop: update clock source registration In d7e81c2 (clocksource: Add clocksource_register_hz/khz interface) new interfaces were added which simplify (and optimize) the selection of the divisor shift/mult constants. Switch over to using this new interface. Signed-off-by: Russell King diff --git a/arch/arm/plat-iop/time.c b/arch/arm/plat-iop/time.c index d615e6f..4332dc4 100644 --- a/arch/arm/plat-iop/time.c +++ b/arch/arm/plat-iop/time.c @@ -170,7 +170,5 @@ void __init iop_init_time(unsigned long tick_rate) write_trr1(0xffffffff); write_tcr1(0xffffffff); write_tmr1(timer_ctl); - clocksource_calc_mult_shift(&iop_clocksource, tick_rate, - IOP_MIN_RANGE); - clocksource_register(&iop_clocksource); + clocksource_register_hz(&iop_clocksource, tick_rate); } -- cgit v0.10.2 From 509e1f0fd7627a5b8d2da9e8c2b4ab1c2743c5f6 Mon Sep 17 00:00:00 2001 From: Russell King Date: Mon, 13 Dec 2010 13:20:35 +0000 Subject: ARM: mxc: update clock source registration In d7e81c2 (clocksource: Add clocksource_register_hz/khz interface) new interfaces were added which simplify (and optimize) the selection of the divisor shift/mult constants. Switch over to using this new interface. Acked-by: Sascha Hauer Signed-off-by: Russell King diff --git a/arch/arm/plat-mxc/epit.c b/arch/arm/plat-mxc/epit.c index ee9582f..d69d343 100644 --- a/arch/arm/plat-mxc/epit.c +++ b/arch/arm/plat-mxc/epit.c @@ -93,7 +93,6 @@ static struct clocksource clocksource_epit = { .rating = 200, .read = epit_read, .mask = CLOCKSOURCE_MASK(32), - .shift = 20, .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; @@ -101,9 +100,7 @@ static int __init epit_clocksource_init(struct clk *timer_clk) { unsigned int c = clk_get_rate(timer_clk); - clocksource_epit.mult = clocksource_hz2mult(c, - clocksource_epit.shift); - clocksource_register(&clocksource_epit); + clocksource_register_hz(&clocksource_epit, c); return 0; } diff --git a/arch/arm/plat-mxc/time.c b/arch/arm/plat-mxc/time.c index f9a1b05..9f0c261 100644 --- a/arch/arm/plat-mxc/time.c +++ b/arch/arm/plat-mxc/time.c @@ -120,7 +120,6 @@ static struct clocksource clocksource_mxc = { .rating = 200, .read = mx1_2_get_cycles, .mask = CLOCKSOURCE_MASK(32), - .shift = 20, .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; @@ -131,9 +130,7 @@ static int __init mxc_clocksource_init(struct clk *timer_clk) if (timer_is_v2()) clocksource_mxc.read = v2_get_cycles; - clocksource_mxc.mult = clocksource_hz2mult(c, - clocksource_mxc.shift); - clocksource_register(&clocksource_mxc); + clocksource_register_hz(&clocksource_mxc, c); return 0; } -- cgit v0.10.2 From 8492fd28987732e42f33a3711299927e8905d448 Mon Sep 17 00:00:00 2001 From: Russell King Date: Mon, 13 Dec 2010 13:20:49 +0000 Subject: ARM: nomadik: update clock source registration In d7e81c2 (clocksource: Add clocksource_register_hz/khz interface) new interfaces were added which simplify (and optimize) the selection of the divisor shift/mult constants. Switch over to using this new interface. Acked-by: Linus Walleij Signed-off-by: Russell King diff --git a/arch/arm/plat-nomadik/timer.c b/arch/arm/plat-nomadik/timer.c index 63cdc60..b0bd6df 100644 --- a/arch/arm/plat-nomadik/timer.c +++ b/arch/arm/plat-nomadik/timer.c @@ -222,7 +222,6 @@ void __init nmdk_timer_init(void) } else { cr |= MTU_CRn_PRESCALE_1; } - clocksource_calc_mult_shift(&nmdk_clksrc, rate, MTU_MIN_RANGE); /* Timer 0 is the free running clocksource */ writel(cr, mtu_base + MTU_CR(0)); @@ -233,7 +232,7 @@ void __init nmdk_timer_init(void) /* Now the clock source is ready */ nmdk_clksrc.read = nmdk_read_timer; - if (clocksource_register(&nmdk_clksrc)) + if (clocksource_register_hz(&nmdk_clksrc, rate)) pr_err("timer: failed to initialize clock source %s\n", nmdk_clksrc.name); -- cgit v0.10.2 From e0387320c32d4b9852e6436233274003e82318a6 Mon Sep 17 00:00:00 2001 From: Russell King Date: Mon, 13 Dec 2010 13:21:21 +0000 Subject: ARM: spear: update clock source registration In d7e81c2 (clocksource: Add clocksource_register_hz/khz interface) new interfaces were added which simplify (and optimize) the selection of the divisor shift/mult constants. Switch over to using this new interface. Acked-by: Viresh Kumar Signed-off-by: Russell King diff --git a/arch/arm/plat-spear/time.c b/arch/arm/plat-spear/time.c index ab21165..839c88d 100644 --- a/arch/arm/plat-spear/time.c +++ b/arch/arm/plat-spear/time.c @@ -81,8 +81,6 @@ static struct clocksource clksrc = { .rating = 200, /* its a pretty decent clock */ .read = clocksource_read_cycles, .mask = 0xFFFF, /* 16 bits */ - .mult = 0, /* to be computed */ - .shift = 0, /* to be computed */ .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; @@ -105,10 +103,8 @@ static void spear_clocksource_init(void) val |= CTRL_ENABLE ; writew(val, gpt_base + CR(CLKSRC)); - clocksource_calc_mult_shift(&clksrc, tick_rate, SPEAR_MIN_RANGE); - /* register the clocksource */ - clocksource_register(&clksrc); + clocksource_register_hz(&clksrc, tick_rate); } static struct clock_event_device clkevt = { -- cgit v0.10.2 From 1d0ac3cdf3d31ba84499c3a914aa2b54eecbf2af Mon Sep 17 00:00:00 2001 From: Russell King Date: Mon, 13 Dec 2010 13:21:33 +0000 Subject: ARM: orion: update clock source registration In d7e81c2 (clocksource: Add clocksource_register_hz/khz interface) new interfaces were added which simplify (and optimize) the selection of the divisor shift/mult constants. Switch over to using this new interface. Acked-by: Nicolas Pitre Signed-off-by: Russell King diff --git a/arch/arm/plat-orion/time.c b/arch/arm/plat-orion/time.c index 715a301..11e2583 100644 --- a/arch/arm/plat-orion/time.c +++ b/arch/arm/plat-orion/time.c @@ -102,7 +102,6 @@ static cycle_t orion_clksrc_read(struct clocksource *cs) static struct clocksource orion_clksrc = { .name = "orion_clocksource", - .shift = 20, .rating = 300, .read = orion_clksrc_read, .mask = CLOCKSOURCE_MASK(32), @@ -245,8 +244,7 @@ void __init orion_time_init(unsigned int irq, unsigned int tclk) writel(u & ~BRIDGE_INT_TIMER0, BRIDGE_MASK); u = readl(TIMER_CTRL); writel(u | TIMER0_EN | TIMER0_RELOAD_EN, TIMER_CTRL); - orion_clksrc.mult = clocksource_hz2mult(tclk, orion_clksrc.shift); - clocksource_register(&orion_clksrc); + clocksource_register_hz(&orion_clksrc, tclk); /* * Setup clockevent timer (interrupt-driven.) -- cgit v0.10.2 From 2218543fe0c40ce36fa165c5003072cc8b236c34 Mon Sep 17 00:00:00 2001 From: Russell King Date: Mon, 13 Dec 2010 13:21:41 +0000 Subject: ARM: stmp: update clock source registration In d7e81c2 (clocksource: Add clocksource_register_hz/khz interface) new interfaces were added which simplify (and optimize) the selection of the divisor shift/mult constants. Switch over to using this new interface. Signed-off-by: Russell King diff --git a/arch/arm/plat-stmp3xxx/timer.c b/arch/arm/plat-stmp3xxx/timer.c index 063c7bc..c395630 100644 --- a/arch/arm/plat-stmp3xxx/timer.c +++ b/arch/arm/plat-stmp3xxx/timer.c @@ -89,7 +89,6 @@ static struct clocksource cksrc_stmp3xxx = { .rating = 250, .read = stmp3xxx_clock_read, .mask = CLOCKSOURCE_MASK(16), - .shift = 10, .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; @@ -106,8 +105,6 @@ static struct irqaction stmp3xxx_timer_irq = { */ static void __init stmp3xxx_init_timer(void) { - cksrc_stmp3xxx.mult = clocksource_hz2mult(CLOCK_TICK_RATE, - cksrc_stmp3xxx.shift); ckevt_timrot.mult = div_sc(CLOCK_TICK_RATE, NSEC_PER_SEC, ckevt_timrot.shift); ckevt_timrot.min_delta_ns = clockevent_delta2ns(2, &ckevt_timrot); @@ -140,7 +137,7 @@ static void __init stmp3xxx_init_timer(void) setup_irq(IRQ_TIMER0, &stmp3xxx_timer_irq); - clocksource_register(&cksrc_stmp3xxx); + clocksource_register_hz(&cksrc_stmp3xxx, CLOCK_TICK_RATE); clockevents_register_device(&ckevt_timrot); } -- cgit v0.10.2 From 11e718a6535c0c7a375b24c3ad60a98b988090c8 Mon Sep 17 00:00:00 2001 From: Russell King Date: Mon, 13 Dec 2010 13:21:52 +0000 Subject: ARM: realview/versatile: update clock source registration In d7e81c2 (clocksource: Add clocksource_register_hz/khz interface) new interfaces were added which simplify (and optimize) the selection of the divisor shift/mult constants. Switch over to using this new interface. Tested-by: Will Deacon Signed-off-by: Russell King diff --git a/arch/arm/plat-versatile/timer-sp.c b/arch/arm/plat-versatile/timer-sp.c index fb0d1c2..f09941b 100644 --- a/arch/arm/plat-versatile/timer-sp.c +++ b/arch/arm/plat-versatile/timer-sp.c @@ -46,7 +46,6 @@ static struct clocksource clocksource_sp804 = { .rating = 200, .read = sp804_read, .mask = CLOCKSOURCE_MASK(32), - .shift = 20, .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; @@ -63,8 +62,7 @@ void __init sp804_clocksource_init(void __iomem *base) writel(TIMER_CTRL_32BIT | TIMER_CTRL_ENABLE | TIMER_CTRL_PERIODIC, clksrc_base + TIMER_CTRL); - cs->mult = clocksource_khz2mult(TIMER_FREQ_KHZ, cs->shift); - clocksource_register(cs); + clocksource_register_khz(cs, TIMER_FREQ_KHZ); } -- cgit v0.10.2 From 684e94cbcb5add60356d124166e40feb2174f0f1 Mon Sep 17 00:00:00 2001 From: Colin Cross Date: Wed, 17 Nov 2010 16:20:15 -0800 Subject: ARM: tegra: timer: Separate clocksource and sched_clock tegra_clocksource_read should not use cnt32_to_63, wrapping is already handled in the clocksource code. Move the cnt32_to_63 into the sched_clock function, and replace the use of clocksource mult and shift with a multiplication by 1000 to convert us to ns. Acked-by: John Stultz Acked-by: Linus Walleij Tested-by: Olof Johansson Signed-off-by: Colin Cross Signed-off-by: Russell King diff --git a/arch/arm/mach-tegra/timer.c b/arch/arm/mach-tegra/timer.c index 9057d6f..b49f2f5 100644 --- a/arch/arm/mach-tegra/timer.c +++ b/arch/arm/mach-tegra/timer.c @@ -91,7 +91,7 @@ static void tegra_timer_set_mode(enum clock_event_mode mode, static cycle_t tegra_clocksource_read(struct clocksource *cs) { - return cnt32_to_63(timer_readl(TIMERUS_CNTR_1US)); + return timer_readl(TIMERUS_CNTR_1US); } static struct clock_event_device tegra_clockevent = { @@ -106,14 +106,13 @@ static struct clocksource tegra_clocksource = { .name = "timer_us", .rating = 300, .read = tegra_clocksource_read, - .mask = 0x7FFFFFFFFFFFFFFFULL, + .mask = CLOCKSOURCE_MASK(32), .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; unsigned long long sched_clock(void) { - return clocksource_cyc2ns(tegra_clocksource.read(&tegra_clocksource), - tegra_clocksource.mult, tegra_clocksource.shift); + return cnt32_to_63(timer_readl(TIMERUS_CNTR_1US)) * 1000; } static irqreturn_t tegra_timer_interrupt(int irq, void *dev_id) -- cgit v0.10.2 From 5e06b6492e53ab2a4e467763a9ee9f70b032c301 Mon Sep 17 00:00:00 2001 From: Russell King Date: Wed, 15 Dec 2010 19:19:25 +0000 Subject: ARM: ensure all sched_clock() implementations are notrace marked ftrace requires sched_clock() to be notrace. Ensure that all implementations are so marked. Also make sure that they include linux/sched.h Also ensure OMAP clocksource read functions are marked notrace as they're used for sched_clock() too. Tested-by: Santosh Shilimkar Tested-by: Will Deacon Tested-by: Mikael Pettersson Tested-by: Eric Miao Tested-by: Olof Johansson Signed-off-by: Russell King diff --git a/arch/arm/mach-ixp4xx/common.c b/arch/arm/mach-ixp4xx/common.c index 82fc003..e0b91d8 100644 --- a/arch/arm/mach-ixp4xx/common.c +++ b/arch/arm/mach-ixp4xx/common.c @@ -424,7 +424,7 @@ static void __init ixp4xx_clocksource_init(void) /* * sched_clock() */ -unsigned long long sched_clock(void) +unsigned long long notrace sched_clock(void) { cycle_t cyc = ixp4xx_get_cycles(NULL); struct clocksource *cs = &clocksource_ixp4xx; diff --git a/arch/arm/mach-mmp/time.c b/arch/arm/mach-mmp/time.c index 0c0ab09..a2ea33d 100644 --- a/arch/arm/mach-mmp/time.c +++ b/arch/arm/mach-mmp/time.c @@ -75,7 +75,7 @@ static inline uint32_t timer_read(void) return __raw_readl(TIMERS_VIRT_BASE + TMR_CVWR(0)); } -unsigned long long sched_clock(void) +unsigned long long notrace sched_clock(void) { unsigned long long v = cnt32_to_63(timer_read()); return (v * tcr2ns_scale) >> TCR2NS_SCALE_FACTOR; diff --git a/arch/arm/mach-pxa/time.c b/arch/arm/mach-pxa/time.c index caf92c0..b8d9dff 100644 --- a/arch/arm/mach-pxa/time.c +++ b/arch/arm/mach-pxa/time.c @@ -51,7 +51,7 @@ static void __init set_oscr2ns_scale(unsigned long oscr_rate) oscr2ns_scale++; } -unsigned long long sched_clock(void) +unsigned long long notrace sched_clock(void) { unsigned long long v = cnt32_to_63(OSCR); return (v * oscr2ns_scale) >> OSCR2NS_SCALE_FACTOR; diff --git a/arch/arm/mach-sa1100/generic.c b/arch/arm/mach-sa1100/generic.c index 3c1fcd6..33b4969 100644 --- a/arch/arm/mach-sa1100/generic.c +++ b/arch/arm/mach-sa1100/generic.c @@ -119,7 +119,7 @@ unsigned int sa11x0_getspeed(unsigned int cpu) * * ( * 1E9 / 3686400 => * 78125 / 288) */ -unsigned long long sched_clock(void) +unsigned long long notrace sched_clock(void) { unsigned long long v = cnt32_to_63(OSCR); diff --git a/arch/arm/mach-tegra/timer.c b/arch/arm/mach-tegra/timer.c index b49f2f5..c52bd84 100644 --- a/arch/arm/mach-tegra/timer.c +++ b/arch/arm/mach-tegra/timer.c @@ -18,6 +18,7 @@ */ #include +#include #include #include #include @@ -110,7 +111,7 @@ static struct clocksource tegra_clocksource = { .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; -unsigned long long sched_clock(void) +unsigned long long notrace sched_clock(void) { return cnt32_to_63(timer_readl(TIMERUS_CNTR_1US)) * 1000; } diff --git a/arch/arm/mach-u300/timer.c b/arch/arm/mach-u300/timer.c index 377ff7f..6c68fe7 100644 --- a/arch/arm/mach-u300/timer.c +++ b/arch/arm/mach-u300/timer.c @@ -9,6 +9,7 @@ * Author: Linus Walleij */ #include +#include #include #include #include diff --git a/arch/arm/plat-iop/time.c b/arch/arm/plat-iop/time.c index 4332dc4..d03a932 100644 --- a/arch/arm/plat-iop/time.c +++ b/arch/arm/plat-iop/time.c @@ -17,6 +17,7 @@ #include #include #include +#include #include #include #include @@ -52,7 +53,7 @@ static struct clocksource iop_clocksource = { /* * IOP sched_clock() implementation via its clocksource. */ -unsigned long long sched_clock(void) +unsigned long long notrace sched_clock(void) { cycle_t cyc = iop_clocksource_read(NULL); struct clocksource *cs = &iop_clocksource; diff --git a/arch/arm/plat-nomadik/timer.c b/arch/arm/plat-nomadik/timer.c index b0bd6df..c3b8a22 100644 --- a/arch/arm/plat-nomadik/timer.c +++ b/arch/arm/plat-nomadik/timer.c @@ -19,6 +19,7 @@ #include #include #include +#include #include #include diff --git a/arch/arm/plat-omap/counter_32k.c b/arch/arm/plat-omap/counter_32k.c index 8f149f5..aed301b 100644 --- a/arch/arm/plat-omap/counter_32k.c +++ b/arch/arm/plat-omap/counter_32k.c @@ -16,6 +16,7 @@ #include #include #include +#include #include #include @@ -44,7 +45,7 @@ static u32 offset_32k __read_mostly; #ifdef CONFIG_ARCH_OMAP16XX -static cycle_t omap16xx_32k_read(struct clocksource *cs) +static cycle_t notrace omap16xx_32k_read(struct clocksource *cs) { return omap_readl(OMAP16XX_TIMER_32K_SYNCHRONIZED) - offset_32k; } @@ -53,7 +54,7 @@ static cycle_t omap16xx_32k_read(struct clocksource *cs) #endif #ifdef CONFIG_ARCH_OMAP2420 -static cycle_t omap2420_32k_read(struct clocksource *cs) +static cycle_t notrace omap2420_32k_read(struct clocksource *cs) { return omap_readl(OMAP2420_32KSYNCT_BASE + 0x10) - offset_32k; } @@ -62,7 +63,7 @@ static cycle_t omap2420_32k_read(struct clocksource *cs) #endif #ifdef CONFIG_ARCH_OMAP2430 -static cycle_t omap2430_32k_read(struct clocksource *cs) +static cycle_t notrace omap2430_32k_read(struct clocksource *cs) { return omap_readl(OMAP2430_32KSYNCT_BASE + 0x10) - offset_32k; } @@ -71,7 +72,7 @@ static cycle_t omap2430_32k_read(struct clocksource *cs) #endif #ifdef CONFIG_ARCH_OMAP3 -static cycle_t omap34xx_32k_read(struct clocksource *cs) +static cycle_t notrace omap34xx_32k_read(struct clocksource *cs) { return omap_readl(OMAP3430_32KSYNCT_BASE + 0x10) - offset_32k; } @@ -80,7 +81,7 @@ static cycle_t omap34xx_32k_read(struct clocksource *cs) #endif #ifdef CONFIG_ARCH_OMAP4 -static cycle_t omap44xx_32k_read(struct clocksource *cs) +static cycle_t notrace omap44xx_32k_read(struct clocksource *cs) { return omap_readl(OMAP4430_32KSYNCT_BASE + 0x10) - offset_32k; } @@ -92,7 +93,7 @@ static cycle_t omap44xx_32k_read(struct clocksource *cs) * Kernel assumes that sched_clock can be called early but may not have * things ready yet. */ -static cycle_t omap_32k_read_dummy(struct clocksource *cs) +static cycle_t notrace omap_32k_read_dummy(struct clocksource *cs) { return 0; } @@ -109,7 +110,7 @@ static struct clocksource clocksource_32k = { * Returns current time from boot in nsecs. It's OK for this to wrap * around for now, as it's just a relative time stamp. */ -unsigned long long sched_clock(void) +unsigned long long notrace sched_clock(void) { return clocksource_cyc2ns(clocksource_32k.read(&clocksource_32k), clocksource_32k.mult, clocksource_32k.shift); diff --git a/arch/arm/plat-orion/time.c b/arch/arm/plat-orion/time.c index 11e2583..123f96f 100644 --- a/arch/arm/plat-orion/time.c +++ b/arch/arm/plat-orion/time.c @@ -55,7 +55,7 @@ static u32 ticks_per_jiffy; static unsigned long tclk2ns_scale; -unsigned long long sched_clock(void) +unsigned long long notrace sched_clock(void) { unsigned long long v = cnt32_to_63(0xffffffff - readl(TIMER0_VAL)); return (v * tclk2ns_scale) >> TCLK2NS_SCALE_FACTOR; diff --git a/arch/arm/plat-versatile/sched-clock.c b/arch/arm/plat-versatile/sched-clock.c index 9696ddc..42efd14 100644 --- a/arch/arm/plat-versatile/sched-clock.c +++ b/arch/arm/plat-versatile/sched-clock.c @@ -42,7 +42,7 @@ * long as there is always less than 89 seconds between successive * calls to this function. */ -unsigned long long sched_clock(void) +unsigned long long notrace sched_clock(void) { unsigned long long v = cnt32_to_63(readl(REFCOUNTER)); -- cgit v0.10.2 From b5776c4a6d0afc13697e8452b9ebe1cc4d961b74 Mon Sep 17 00:00:00 2001 From: john stultz Date: Thu, 16 Dec 2010 19:03:27 +0000 Subject: Fix rounding in clocks_calc_mult_shift() Russell King reports: | On the ARM dev boards, we have a 32-bit counter running at 24MHz. Calling | clocks_calc_mult_shift(&mult, &shift, 24MHz, NSEC_PER_SEC, 60) gives | us a multiplier of 2796202666 and a shift of 26. | | Over a large counter delta, this produces an error - lets take a count | from 362976315 to 4280663372: | | (4280663372-362976315) * 2796202666 / 2^26 - (4280663372-362976315) * (1000/24) | => -38.91872422891230269990 | | Can we do better? | | (4280663372-362976315) * 2796202667 / 2^26 - (4280663372-362976315) * (1000/24) | 19.45936211449532822051 | | which is about twice as good as the 2796202666 multiplier. | | Looking at the equivalent divisions obtained, 2796202666 / 2^26 gives | 41.66666665673255920410ns per tick, whereas 2796202667 / 2^26 gives | 41.66666667163372039794ns. The actual value wanted is 1000/24 = | 41.66666666666666666666ns. Fix this by ensuring we round to nearest when calculating the multiplier. Signed-off-by: John Stultz Tested-by: Santosh Shilimkar Tested-by: Will Deacon Tested-by: Mikael Pettersson Tested-by: Eric Miao Tested-by: Olof Johansson Tested-by: Jamie Iles Signed-off-by: Russell King diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c index c18d7ef..df140cd 100644 --- a/kernel/time/clocksource.c +++ b/kernel/time/clocksource.c @@ -152,6 +152,7 @@ clocks_calc_mult_shift(u32 *mult, u32 *shift, u32 from, u32 to, u32 minsec) */ for (sft = 32; sft > 0; sft--) { tmp = (u64) to << sft; + tmp += from / 2; do_div(tmp, from); if ((tmp >> sftacc) == 0) break; -- cgit v0.10.2 From 112f38a4a31668eb6a7d91d128296a26afdf7c4b Mon Sep 17 00:00:00 2001 From: Russell King Date: Wed, 15 Dec 2010 19:23:07 +0000 Subject: ARM: sched_clock: provide common infrastructure for sched_clock() Provide common sched_clock() infrastructure for platforms to use to create a 64-bit ns based sched_clock() implementation from a counter running at a non-variable clock rate. This implementation is based upon maintaining an epoch for the counter and an epoch for the nanosecond time. When we desire a sched_clock() time, we calculate the number of counter ticks since the last epoch update, convert this to nanoseconds and add to the epoch nanoseconds. We regularly refresh these epochs within the counter wrap interval. We perform a similar calculation as above, and store the new epochs. We read and write the epochs in such a way that sched_clock() can easily (and locklessly) detect when an update is in progress, and repeat the loading of these constants when they're known not to be stable. The one caveat is that sched_clock() is not called in the middle of an update. We achieve that by disabling IRQs. Finally, if the clock rate is known at compile time, the counter to ns conversion factors can be specified, allowing sched_clock() to be tightly optimized. We ensure that these factors are correct by providing an initialization function which performs a run-time check. Acked-by: Peter Zijlstra Tested-by: Santosh Shilimkar Tested-by: Will Deacon Tested-by: Mikael Pettersson Tested-by: Eric Miao Tested-by: Olof Johansson Tested-by: Jamie Iles Reviewed-by: Nicolas Pitre Signed-off-by: Russell King diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 49778bb..ed7a0a7 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -38,6 +38,9 @@ config HAVE_PWM config SYS_SUPPORTS_APM_EMULATION bool +config HAVE_SCHED_CLOCK + bool + config GENERIC_GPIO bool diff --git a/arch/arm/include/asm/sched_clock.h b/arch/arm/include/asm/sched_clock.h new file mode 100644 index 0000000..a84628b --- /dev/null +++ b/arch/arm/include/asm/sched_clock.h @@ -0,0 +1,118 @@ +/* + * sched_clock.h: support for extending counters to full 64-bit ns counter + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef ASM_SCHED_CLOCK +#define ASM_SCHED_CLOCK + +#include +#include + +struct clock_data { + u64 epoch_ns; + u32 epoch_cyc; + u32 epoch_cyc_copy; + u32 mult; + u32 shift; +}; + +#define DEFINE_CLOCK_DATA(name) struct clock_data name + +static inline u64 cyc_to_ns(u64 cyc, u32 mult, u32 shift) +{ + return (cyc * mult) >> shift; +} + +/* + * Atomically update the sched_clock epoch. Your update callback will + * be called from a timer before the counter wraps - read the current + * counter value, and call this function to safely move the epochs + * forward. Only use this from the update callback. + */ +static inline void update_sched_clock(struct clock_data *cd, u32 cyc, u32 mask) +{ + unsigned long flags; + u64 ns = cd->epoch_ns + + cyc_to_ns((cyc - cd->epoch_cyc) & mask, cd->mult, cd->shift); + + /* + * Write epoch_cyc and epoch_ns in a way that the update is + * detectable in cyc_to_fixed_sched_clock(). + */ + raw_local_irq_save(flags); + cd->epoch_cyc = cyc; + smp_wmb(); + cd->epoch_ns = ns; + smp_wmb(); + cd->epoch_cyc_copy = cyc; + raw_local_irq_restore(flags); +} + +/* + * If your clock rate is known at compile time, using this will allow + * you to optimize the mult/shift loads away. This is paired with + * init_fixed_sched_clock() to ensure that your mult/shift are correct. + */ +static inline unsigned long long cyc_to_fixed_sched_clock(struct clock_data *cd, + u32 cyc, u32 mask, u32 mult, u32 shift) +{ + u64 epoch_ns; + u32 epoch_cyc; + + /* + * Load the epoch_cyc and epoch_ns atomically. We do this by + * ensuring that we always write epoch_cyc, epoch_ns and + * epoch_cyc_copy in strict order, and read them in strict order. + * If epoch_cyc and epoch_cyc_copy are not equal, then we're in + * the middle of an update, and we should repeat the load. + */ + do { + epoch_cyc = cd->epoch_cyc; + smp_rmb(); + epoch_ns = cd->epoch_ns; + smp_rmb(); + } while (epoch_cyc != cd->epoch_cyc_copy); + + return epoch_ns + cyc_to_ns((cyc - epoch_cyc) & mask, mult, shift); +} + +/* + * Otherwise, you need to use this, which will obtain the mult/shift + * from the clock_data structure. Use init_sched_clock() with this. + */ +static inline unsigned long long cyc_to_sched_clock(struct clock_data *cd, + u32 cyc, u32 mask) +{ + return cyc_to_fixed_sched_clock(cd, cyc, mask, cd->mult, cd->shift); +} + +/* + * Initialize the clock data - calculate the appropriate multiplier + * and shift. Also setup a timer to ensure that the epoch is refreshed + * at the appropriate time interval, which will call your update + * handler. + */ +void init_sched_clock(struct clock_data *, void (*)(void), + unsigned int, unsigned long); + +/* + * Use this initialization function rather than init_sched_clock() if + * you're using cyc_to_fixed_sched_clock, which will warn if your + * constants are incorrect. + */ +static inline void init_fixed_sched_clock(struct clock_data *cd, + void (*update)(void), unsigned int bits, unsigned long rate, + u32 mult, u32 shift) +{ + init_sched_clock(cd, update, bits, rate); + if (cd->mult != mult || cd->shift != shift) { + pr_crit("sched_clock: wrong multiply/shift: %u>>%u vs calculated %u>>%u\n" + "sched_clock: fix multiply/shift to avoid scheduler hiccups\n", + mult, shift, cd->mult, cd->shift); + } +} + +#endif diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile index 679851a..fd3ec49 100644 --- a/arch/arm/kernel/Makefile +++ b/arch/arm/kernel/Makefile @@ -29,6 +29,7 @@ obj-$(CONFIG_MODULES) += armksyms.o module.o obj-$(CONFIG_ARTHUR) += arthur.o obj-$(CONFIG_ISA_DMA) += dma-isa.o obj-$(CONFIG_PCI) += bios32.o isa.o +obj-$(CONFIG_HAVE_SCHED_CLOCK) += sched_clock.o obj-$(CONFIG_SMP) += smp.o obj-$(CONFIG_HAVE_ARM_SCU) += smp_scu.o obj-$(CONFIG_HAVE_ARM_TWD) += smp_twd.o diff --git a/arch/arm/kernel/sched_clock.c b/arch/arm/kernel/sched_clock.c new file mode 100644 index 0000000..2cdcc92 --- /dev/null +++ b/arch/arm/kernel/sched_clock.c @@ -0,0 +1,69 @@ +/* + * sched_clock.c: support for extending counters to full 64-bit ns counter + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include +#include +#include +#include +#include +#include + +#include + +static void sched_clock_poll(unsigned long wrap_ticks); +static DEFINE_TIMER(sched_clock_timer, sched_clock_poll, 0, 0); +static void (*sched_clock_update_fn)(void); + +static void sched_clock_poll(unsigned long wrap_ticks) +{ + mod_timer(&sched_clock_timer, round_jiffies(jiffies + wrap_ticks)); + sched_clock_update_fn(); +} + +void __init init_sched_clock(struct clock_data *cd, void (*update)(void), + unsigned int clock_bits, unsigned long rate) +{ + unsigned long r, w; + u64 res, wrap; + char r_unit; + + sched_clock_update_fn = update; + + /* calculate the mult/shift to convert counter ticks to ns. */ + clocks_calc_mult_shift(&cd->mult, &cd->shift, rate, NSEC_PER_SEC, 60); + + r = rate; + if (r >= 4000000) { + r /= 1000000; + r_unit = 'M'; + } else { + r /= 1000; + r_unit = 'k'; + } + + /* calculate how many ns until we wrap */ + wrap = cyc_to_ns((1ULL << clock_bits) - 1, cd->mult, cd->shift); + do_div(wrap, NSEC_PER_MSEC); + w = wrap; + + /* calculate the ns resolution of this counter */ + res = cyc_to_ns(1ULL, cd->mult, cd->shift); + pr_info("sched_clock: %u bits at %lu%cHz, resolution %lluns, wraps every %lums\n", + clock_bits, r, r_unit, res, w); + + /* + * Start the timer to keep sched_clock() properly updated and + * sets the initial epoch. + */ + sched_clock_timer.data = msecs_to_jiffies(w - (w / 10)); + sched_clock_poll(sched_clock_timer.data); + + /* + * Ensure that sched_clock() starts off at 0ns + */ + cd->epoch_ns = 0; +} -- cgit v0.10.2 From 5b0d495c067d843c52fc1f9edbca29d5e9368b10 Mon Sep 17 00:00:00 2001 From: Russell King Date: Wed, 15 Dec 2010 21:23:13 +0000 Subject: ARM: ixp4xx: convert sched_clock() to use new infrastructure Convert ixp4xx to use the new sched_clock() infrastructure for extending 32bit counters to full 64-bit nanoseconds. Tested-by: Mikael Pettersson Signed-off-by: Russell King diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index ed7a0a7..6f58bce 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -437,6 +437,7 @@ config ARCH_IXP4XX select CPU_XSCALE select GENERIC_GPIO select GENERIC_CLOCKEVENTS + select HAVE_SCHED_CLOCK select DMABOUNCE if PCI help Support for Intel's IXP4XX (XScale) family of processors. diff --git a/arch/arm/mach-ixp4xx/common.c b/arch/arm/mach-ixp4xx/common.c index e0b91d8..4dbfcbb 100644 --- a/arch/arm/mach-ixp4xx/common.c +++ b/arch/arm/mach-ixp4xx/common.c @@ -35,6 +35,7 @@ #include #include #include +#include #include #include @@ -399,6 +400,23 @@ void __init ixp4xx_sys_init(void) } /* + * sched_clock() + */ +static DEFINE_CLOCK_DATA(cd); + +unsigned long long notrace sched_clock(void) +{ + u32 cyc = *IXP4XX_OSTS; + return cyc_to_sched_clock(&cd, cyc, (u32)~0); +} + +static void notrace ixp4xx_update_sched_clock(void) +{ + u32 cyc = *IXP4XX_OSTS; + update_sched_clock(&cd, cyc, (u32)~0); +} + +/* * clocksource */ static cycle_t ixp4xx_get_cycles(struct clocksource *cs) @@ -418,18 +436,9 @@ unsigned long ixp4xx_timer_freq = FREQ; EXPORT_SYMBOL(ixp4xx_timer_freq); static void __init ixp4xx_clocksource_init(void) { - clocksource_register_hz(&clocksource_ixp4xx, ixp4xx_timer_freq); -} - -/* - * sched_clock() - */ -unsigned long long notrace sched_clock(void) -{ - cycle_t cyc = ixp4xx_get_cycles(NULL); - struct clocksource *cs = &clocksource_ixp4xx; + init_sched_clock(&cd, ixp4xx_update_sched_clock, 32, ixp4xx_timer_freq); - return clocksource_cyc2ns(cyc, cs->mult, cs->shift); + clocksource_register_hz(&clocksource_ixp4xx, ixp4xx_timer_freq); } /* -- cgit v0.10.2 From 28bb7bc61a8cd48716d38d9c153fdc524f09870a Mon Sep 17 00:00:00 2001 From: Russell King Date: Wed, 15 Dec 2010 21:46:48 +0000 Subject: ARM: mmp: convert sched_clock() to use new infrastructure Convert mmp to use the new sched_clock() infrastructure for extending 32bit counters to full 64-bit nanoseconds. Signed-off-by: Russell King diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 6f58bce..0208e1e 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -513,6 +513,7 @@ config ARCH_MMP select ARCH_REQUIRE_GPIOLIB select COMMON_CLKDEV select GENERIC_CLOCKEVENTS + select HAVE_SCHED_CLOCK select TICK_ONESHOT select PLAT_PXA select SPARSE_IRQ diff --git a/arch/arm/mach-mmp/time.c b/arch/arm/mach-mmp/time.c index a2ea33d..aeb9ae2 100644 --- a/arch/arm/mach-mmp/time.c +++ b/arch/arm/mach-mmp/time.c @@ -26,8 +26,8 @@ #include #include #include -#include +#include #include #include #include @@ -42,23 +42,7 @@ #define MAX_DELTA (0xfffffffe) #define MIN_DELTA (16) -#define TCR2NS_SCALE_FACTOR 10 - -static unsigned long tcr2ns_scale; - -static void __init set_tcr2ns_scale(unsigned long tcr_rate) -{ - unsigned long long v = 1000000000ULL << TCR2NS_SCALE_FACTOR; - do_div(v, tcr_rate); - tcr2ns_scale = v; - /* - * We want an even value to automatically clear the top bit - * returned by cnt32_to_63() without an additional run time - * instruction. So if the LSB is 1 then round it up. - */ - if (tcr2ns_scale & 1) - tcr2ns_scale++; -} +static DEFINE_CLOCK_DATA(cd); /* * FIXME: the timer needs some delay to stablize the counter capture @@ -77,8 +61,14 @@ static inline uint32_t timer_read(void) unsigned long long notrace sched_clock(void) { - unsigned long long v = cnt32_to_63(timer_read()); - return (v * tcr2ns_scale) >> TCR2NS_SCALE_FACTOR; + u32 cyc = timer_read(); + return cyc_to_sched_clock(&cd, cyc, (u32)~0); +} + +static void notrace mmp_update_sched_clock(void) +{ + u32 cyc = timer_read(); + update_sched_clock(&cd, cyc, (u32)~0); } static irqreturn_t timer_interrupt(int irq, void *dev_id) @@ -185,7 +175,7 @@ void __init timer_init(int irq) { timer_config(); - set_tcr2ns_scale(CLOCK_TICK_RATE); + init_sched_clock(&cd, mmp_update_sched_clock, 32, CLOCK_TICK_RATE); ckevt.mult = div_sc(CLOCK_TICK_RATE, NSEC_PER_SEC, ckevt.shift); ckevt.max_delta_ns = clockevent_delta2ns(MAX_DELTA, &ckevt); -- cgit v0.10.2 From 7ce830188199c23aaeaf0c5ccc28b73c32b6df02 Mon Sep 17 00:00:00 2001 From: Russell King Date: Wed, 15 Dec 2010 21:48:15 +0000 Subject: ARM: pxa: convert sched_clock() to use new infrastructure Convert pxa to use the new sched_clock() infrastructure for extending 32bit counters to full 64-bit nanoseconds. Tested-by: Eric Miao Signed-off-by: Russell King diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 0208e1e..23035d6 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -593,6 +593,7 @@ config ARCH_PXA select COMMON_CLKDEV select ARCH_REQUIRE_GPIOLIB select GENERIC_CLOCKEVENTS + select HAVE_SCHED_CLOCK select TICK_ONESHOT select PLAT_PXA select SPARSE_IRQ diff --git a/arch/arm/mach-pxa/time.c b/arch/arm/mach-pxa/time.c index b8d9dff..e7f64d9 100644 --- a/arch/arm/mach-pxa/time.c +++ b/arch/arm/mach-pxa/time.c @@ -17,11 +17,11 @@ #include #include #include -#include #include #include #include +#include #include /* @@ -32,29 +32,18 @@ * long as there is always less than 582 seconds between successive * calls to sched_clock() which should always be the case in practice. */ +static DEFINE_CLOCK_DATA(cd); -#define OSCR2NS_SCALE_FACTOR 10 - -static unsigned long oscr2ns_scale; - -static void __init set_oscr2ns_scale(unsigned long oscr_rate) +unsigned long long notrace sched_clock(void) { - unsigned long long v = 1000000000ULL << OSCR2NS_SCALE_FACTOR; - do_div(v, oscr_rate); - oscr2ns_scale = v; - /* - * We want an even value to automatically clear the top bit - * returned by cnt32_to_63() without an additional run time - * instruction. So if the LSB is 1 then round it up. - */ - if (oscr2ns_scale & 1) - oscr2ns_scale++; + u32 cyc = OSCR; + return cyc_to_sched_clock(&cd, cyc, (u32)~0); } -unsigned long long notrace sched_clock(void) +static void notrace pxa_update_sched_clock(void) { - unsigned long long v = cnt32_to_63(OSCR); - return (v * oscr2ns_scale) >> OSCR2NS_SCALE_FACTOR; + u32 cyc = OSCR; + update_sched_clock(&cd, cyc, (u32)~0); } @@ -144,7 +133,7 @@ static void __init pxa_timer_init(void) OIER = 0; OSSR = OSSR_M0 | OSSR_M1 | OSSR_M2 | OSSR_M3; - set_oscr2ns_scale(clock_tick_rate); + init_sched_clock(&cd, pxa_update_sched_clock, 32, clock_tick_rate); ckevt_pxa_osmr0.mult = div_sc(clock_tick_rate, NSEC_PER_SEC, ckevt_pxa_osmr0.shift); -- cgit v0.10.2 From 5094b92f1c7d0f21c5d4411ba7415bac0684210f Mon Sep 17 00:00:00 2001 From: Russell King Date: Wed, 15 Dec 2010 21:49:06 +0000 Subject: ARM: sa1100: convert sched_clock() to use new infrastructure Convert sa1100 to use the new sched_clock() infrastructure for extending 32bit counters to full 64-bit nanoseconds. Signed-off-by: Russell King diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 23035d6..0e1a966 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -642,6 +642,7 @@ config ARCH_SA1100 select CPU_FREQ select GENERIC_CLOCKEVENTS select HAVE_CLK + select HAVE_SCHED_CLOCK select TICK_ONESHOT select ARCH_REQUIRE_GPIOLIB help diff --git a/arch/arm/mach-sa1100/generic.c b/arch/arm/mach-sa1100/generic.c index 33b4969..fbc224d 100644 --- a/arch/arm/mach-sa1100/generic.c +++ b/arch/arm/mach-sa1100/generic.c @@ -16,9 +16,7 @@ #include #include #include -#include /* just for sched_clock() - funny that */ #include -#include #include #include @@ -110,27 +108,6 @@ unsigned int sa11x0_getspeed(unsigned int cpu) } /* - * This is the SA11x0 sched_clock implementation. This has - * a resolution of 271ns, and a maximum value of 32025597s (370 days). - * - * The return value is guaranteed to be monotonic in that range as - * long as there is always less than 582 seconds between successive - * calls to this function. - * - * ( * 1E9 / 3686400 => * 78125 / 288) - */ -unsigned long long notrace sched_clock(void) -{ - unsigned long long v = cnt32_to_63(OSCR); - - /* the <<1 gets rid of the cnt_32_to_63 top bit saving on a bic insn */ - v *= 78125<<1; - do_div(v, 288<<1); - - return v; -} - -/* * Default power-off for SA1100 */ static void sa1100_power_off(void) diff --git a/arch/arm/mach-sa1100/time.c b/arch/arm/mach-sa1100/time.c index 96154f5..ae4f3d8 100644 --- a/arch/arm/mach-sa1100/time.c +++ b/arch/arm/mach-sa1100/time.c @@ -12,12 +12,39 @@ #include #include #include +#include /* just for sched_clock() - funny that */ #include #include #include +#include #include +/* + * This is the SA11x0 sched_clock implementation. + */ +static DEFINE_CLOCK_DATA(cd); + +/* + * Constants generated by clocks_calc_mult_shift(m, s, 3.6864MHz, + * NSEC_PER_SEC, 60). + * This gives a resolution of about 271ns and a wrap period of about 19min. + */ +#define SC_MULT 2275555556u +#define SC_SHIFT 23 + +unsigned long long notrace sched_clock(void) +{ + u32 cyc = OSCR; + return cyc_to_fixed_sched_clock(&cd, cyc, (u32)~0, SC_MULT, SC_SHIFT); +} + +static void notrace sa1100_update_sched_clock(void) +{ + u32 cyc = OSCR; + update_sched_clock(&cd, cyc, (u32)~0); +} + #define MIN_OSCR_DELTA 2 static irqreturn_t sa1100_ost0_interrupt(int irq, void *dev_id) @@ -96,6 +123,9 @@ static void __init sa1100_timer_init(void) OIER = 0; /* disable any timer interrupts */ OSSR = 0xf; /* clear status on all timers */ + init_fixed_sched_clock(&cd, sa1100_update_sched_clock, 32, + 3686400, SC_MULT, SC_SHIFT); + ckevt_sa1100_osmr0.mult = div_sc(3686400, NSEC_PER_SEC, ckevt_sa1100_osmr0.shift); ckevt_sa1100_osmr0.max_delta_ns = -- cgit v0.10.2 From e3f4c0ab916334e861fc49eeb2673a8c13e978e7 Mon Sep 17 00:00:00 2001 From: Russell King Date: Wed, 15 Dec 2010 21:49:42 +0000 Subject: ARM: tegra: convert sched_clock() to use new infrastructure Convert tegra to use the new sched_clock() infrastructure for extending 32bit counters to full 64-bit nanoseconds. Tested-by: Olof Johansson Signed-off-by: Russell King diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 0e1a966..ec7b027 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -570,6 +570,7 @@ config ARCH_TEGRA select GENERIC_CLOCKEVENTS select GENERIC_GPIO select HAVE_CLK + select HAVE_SCHED_CLOCK select COMMON_CLKDEV select ARCH_HAS_BARRIERS if CACHE_L2X0 select ARCH_HAS_CPUFREQ diff --git a/arch/arm/mach-tegra/timer.c b/arch/arm/mach-tegra/timer.c index c52bd84..7b8ad1f 100644 --- a/arch/arm/mach-tegra/timer.c +++ b/arch/arm/mach-tegra/timer.c @@ -26,10 +26,10 @@ #include #include #include -#include #include #include +#include #include #include @@ -111,9 +111,25 @@ static struct clocksource tegra_clocksource = { .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; +static DEFINE_CLOCK_DATA(cd); + +/* + * Constants generated by clocks_calc_mult_shift(m, s, 1MHz, NSEC_PER_SEC, 60). + * This gives a resolution of about 1us and a wrap period of about 1h11min. + */ +#define SC_MULT 4194304000u +#define SC_SHIFT 22 + unsigned long long notrace sched_clock(void) { - return cnt32_to_63(timer_readl(TIMERUS_CNTR_1US)) * 1000; + u32 cyc = timer_readl(TIMERUS_CNTR_1US); + return cyc_to_fixed_sched_clock(&cd, cyc, (u32)~0, SC_MULT, SC_SHIFT); +} + +static void notrace tegra_update_sched_clock(void) +{ + u32 cyc = timer_readl(TIMERUS_CNTR_1US); + update_sched_clock(&cd, cyc, (u32)~0); } static irqreturn_t tegra_timer_interrupt(int irq, void *dev_id) @@ -158,6 +174,9 @@ static void __init tegra_init_timer(void) WARN(1, "Unknown clock rate"); } + init_fixed_sched_clock(&cd, tegra_update_sched_clock, 32, + 1000000, SC_MULT, SC_SHIFT); + if (clocksource_register_hz(&tegra_clocksource, 1000000)) { printk(KERN_ERR "Failed to register clocksource\n"); BUG(); -- cgit v0.10.2 From 5c21b7ca2c1cca3758a1d357dd57987c96ad1aa0 Mon Sep 17 00:00:00 2001 From: Russell King Date: Wed, 15 Dec 2010 21:50:14 +0000 Subject: ARM: u300: convert sched_clock() to use new infrastructure Convert u300 to use the new sched_clock() infrastructure for extending 32bit counters to full 64-bit nanoseconds. Acked-by: Linus Walleij Signed-off-by: Russell King diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index ec7b027..d5bd266 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -790,6 +790,7 @@ config ARCH_U300 bool "ST-Ericsson U300 Series" depends on MMU select CPU_ARM926T + select HAVE_SCHED_CLOCK select HAVE_TCM select ARM_AMBA select ARM_VIC diff --git a/arch/arm/mach-u300/timer.c b/arch/arm/mach-u300/timer.c index 6c68fe7..3ec58bd 100644 --- a/arch/arm/mach-u300/timer.c +++ b/arch/arm/mach-u300/timer.c @@ -22,6 +22,7 @@ #include /* Generic stuff */ +#include #include #include #include @@ -353,12 +354,18 @@ static struct clocksource clocksource_u300_1mhz = { * this wraps around for now, since it is just a relative time * stamp. (Inspired by OMAP implementation.) */ +static DEFINE_CLOCK_DATA(cd); + unsigned long long notrace sched_clock(void) { - return clocksource_cyc2ns(clocksource_u300_1mhz.read( - &clocksource_u300_1mhz), - clocksource_u300_1mhz.mult, - clocksource_u300_1mhz.shift); + u32 cyc = readl(U300_TIMER_APP_VBASE + U300_TIMER_APP_GPT2CC); + return cyc_to_sched_clock(&cd, cyc, (u32)~0); +} + +static void notrace u300_update_sched_clock(void) +{ + u32 cyc = readl(U300_TIMER_APP_VBASE + U300_TIMER_APP_GPT2CC); + update_sched_clock(&cd, cyc, (u32)~0); } @@ -376,6 +383,8 @@ static void __init u300_timer_init(void) clk_enable(clk); rate = clk_get_rate(clk); + init_sched_clock(&cd, u300_update_sched_clock, 32, rate); + /* * Disable the "OS" and "DD" timers - these are designed for Symbian! * Example usage in cnh1601578 cpu subsystem pd_timer_app.c -- cgit v0.10.2 From 08f26b1ef25a2f7b52afcb805d260fd5a000a7f6 Mon Sep 17 00:00:00 2001 From: Russell King Date: Wed, 15 Dec 2010 21:52:10 +0000 Subject: ARM: iop: convert sched_clock() to use new infrastructure Convert iop platforms to use the new sched_clock() infrastructure for extending 32bit counters to full 64-bit nanoseconds. Signed-off-by: Russell King diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index d5bd266..58e2fe3 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -992,6 +992,7 @@ config ARCH_ACORN config PLAT_IOP bool select GENERIC_CLOCKEVENTS + select HAVE_SCHED_CLOCK config PLAT_ORION bool diff --git a/arch/arm/plat-iop/time.c b/arch/arm/plat-iop/time.c index d03a932..2db6e60 100644 --- a/arch/arm/plat-iop/time.c +++ b/arch/arm/plat-iop/time.c @@ -24,6 +24,7 @@ #include #include #include +#include #include #include #include @@ -50,15 +51,21 @@ static struct clocksource iop_clocksource = { .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; +static DEFINE_CLOCK_DATA(cd); + /* * IOP sched_clock() implementation via its clocksource. */ unsigned long long notrace sched_clock(void) { - cycle_t cyc = iop_clocksource_read(NULL); - struct clocksource *cs = &iop_clocksource; + u32 cyc = 0xffffffffu - read_tcr1(); + return cyc_to_sched_clock(&cd, cyc, (u32)~0); +} - return clocksource_cyc2ns(cyc, cs->mult, cs->shift); +static void notrace iop_update_sched_clock(void) +{ + u32 cyc = 0xffffffffu - read_tcr1(); + update_sched_clock(&cd, cyc, (u32)~0); } /* @@ -144,6 +151,8 @@ void __init iop_init_time(unsigned long tick_rate) { u32 timer_ctl; + init_sched_clock(&cd, iop_update_sched_clock, 32, tick_rate); + ticks_per_jiffy = DIV_ROUND_CLOSEST(tick_rate, HZ); iop_tick_rate = tick_rate; -- cgit v0.10.2 From ec05aa139939d9c7b790041a379f0e752b2f1a4d Mon Sep 17 00:00:00 2001 From: Russell King Date: Wed, 15 Dec 2010 21:53:02 +0000 Subject: ARM: nomadik: convert sched_clock() to use new infrastructure Convert nomadik platforms to use the new sched_clock() infrastructure for extending 32bit counters to full 64-bit nanoseconds. Acked-by: Linus Walleij Signed-off-by: Russell King diff --git a/arch/arm/plat-nomadik/Kconfig b/arch/arm/plat-nomadik/Kconfig index 5da3f97..187f4e8 100644 --- a/arch/arm/plat-nomadik/Kconfig +++ b/arch/arm/plat-nomadik/Kconfig @@ -14,6 +14,7 @@ if PLAT_NOMADIK config HAS_MTU bool + select HAVE_SCHED_CLOCK help Support for Multi Timer Unit. MTU provides access to multiple interrupt generating programmable diff --git a/arch/arm/plat-nomadik/timer.c b/arch/arm/plat-nomadik/timer.c index c3b8a22..4172340 100644 --- a/arch/arm/plat-nomadik/timer.c +++ b/arch/arm/plat-nomadik/timer.c @@ -17,10 +17,9 @@ #include #include #include -#include -#include #include #include +#include #include @@ -53,81 +52,24 @@ static struct clocksource nmdk_clksrc = { * Override the global weak sched_clock symbol with this * local implementation which uses the clocksource to get some * better resolution when scheduling the kernel. - * - * Because the hardware timer period may be quite short - * (32.3 secs on the 133 MHz MTU timer selection on ux500) - * and because cnt32_to_63() needs to be called at least once per - * half period to work properly, a kernel keepwarm() timer is set up - * to ensure this requirement is always met. - * - * Also the sched_clock timer will wrap around at some point, - * here we set it to run continously for a year. */ -#define SCHED_CLOCK_MIN_WRAP 3600*24*365 -static struct timer_list cnt32_to_63_keepwarm_timer; -static u32 sched_mult; -static u32 sched_shift; +static DEFINE_CLOCK_DATA(cd); unsigned long long notrace sched_clock(void) { - u64 cycles; + u32 cyc; if (unlikely(!mtu_base)) return 0; - cycles = cnt32_to_63(-readl(mtu_base + MTU_VAL(0))); - /* - * sched_mult is guaranteed to be even so will - * shift out bit 63 - */ - return (cycles * sched_mult) >> sched_shift; + cyc = -readl(mtu_base + MTU_VAL(0)); + return cyc_to_sched_clock(&cd, cyc, (u32)~0); } -/* Just kick sched_clock every so often */ -static void cnt32_to_63_keepwarm(unsigned long data) +static void notrace nomadik_update_sched_clock(void) { - mod_timer(&cnt32_to_63_keepwarm_timer, round_jiffies(jiffies + data)); - (void) sched_clock(); -} - -/* - * Set up a timer to keep sched_clock():s 32_to_63 algorithm warm - * once in half a 32bit timer wrap interval. - */ -static void __init nmdk_sched_clock_init(unsigned long rate) -{ - u32 v; - unsigned long delta; - u64 days; - - /* Find the apropriate mult and shift factors */ - clocks_calc_mult_shift(&sched_mult, &sched_shift, - rate, NSEC_PER_SEC, SCHED_CLOCK_MIN_WRAP); - /* We need to multiply by an even number to get rid of bit 63 */ - if (sched_mult & 1) - sched_mult++; - - /* Let's see what we get, take max counter and scale it */ - days = (0xFFFFFFFFFFFFFFFFLLU * sched_mult) >> sched_shift; - do_div(days, NSEC_PER_SEC); - do_div(days, (3600*24)); - - pr_info("sched_clock: using %d bits @ %lu Hz wrap in %lu days\n", - (64 - sched_shift), rate, (unsigned long) days); - - /* - * Program a timer to kick us at half 32bit wraparound - * Formula: seconds per wrap = (2^32) / f - */ - v = 0xFFFFFFFFUL / rate; - /* We want half of the wrap time to keep cnt32_to_63 warm */ - v /= 2; - pr_debug("sched_clock: prescaled timer rate: %lu Hz, " - "initialize keepwarm timer every %d seconds\n", rate, v); - /* Convert seconds to jiffies */ - delta = msecs_to_jiffies(v*1000); - setup_timer(&cnt32_to_63_keepwarm_timer, cnt32_to_63_keepwarm, delta); - mod_timer(&cnt32_to_63_keepwarm_timer, round_jiffies(jiffies + delta)); + u32 cyc = -readl(mtu_base + MTU_VAL(0)); + update_sched_clock(&cd, cyc, (u32)~0); } /* Clockevent device: use one-shot mode */ @@ -237,7 +179,7 @@ void __init nmdk_timer_init(void) pr_err("timer: failed to initialize clock source %s\n", nmdk_clksrc.name); - nmdk_sched_clock_init(rate); + init_sched_clock(&cd, nomadik_update_sched_clock, 32, rate); /* Timer 1 is used for events */ -- cgit v0.10.2 From dc548fbbd2ecd0fc3b02301d551e5f8e19ae58fd Mon Sep 17 00:00:00 2001 From: Russell King Date: Wed, 15 Dec 2010 21:53:51 +0000 Subject: ARM: omap: convert sched_clock() to use new infrastructure Convert omap to use the new sched_clock() infrastructure for extending 32bit counters to full 64-bit nanoseconds. Tested-by: Santosh Shilimkar Signed-off-by: Russell King diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 58e2fe3..726279f 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -839,6 +839,7 @@ config ARCH_OMAP select ARCH_REQUIRE_GPIOLIB select ARCH_HAS_CPUFREQ select GENERIC_CLOCKEVENTS + select HAVE_SCHED_CLOCK select ARCH_HAS_HOLES_MEMORYMODEL help Support for TI's OMAP platform (OMAP1/2/3/4). diff --git a/arch/arm/plat-omap/counter_32k.c b/arch/arm/plat-omap/counter_32k.c index aed301b..1b558efb 100644 --- a/arch/arm/plat-omap/counter_32k.c +++ b/arch/arm/plat-omap/counter_32k.c @@ -18,6 +18,8 @@ #include #include +#include + #include #include @@ -110,10 +112,25 @@ static struct clocksource clocksource_32k = { * Returns current time from boot in nsecs. It's OK for this to wrap * around for now, as it's just a relative time stamp. */ +static DEFINE_CLOCK_DATA(cd); + +/* + * Constants generated by clocks_calc_mult_shift(m, s, 32768, NSEC_PER_SEC, 60). + * This gives a resolution of about 30us and a wrap period of about 36hrs. + */ +#define SC_MULT 4000000000u +#define SC_SHIFT 17 + unsigned long long notrace sched_clock(void) { - return clocksource_cyc2ns(clocksource_32k.read(&clocksource_32k), - clocksource_32k.mult, clocksource_32k.shift); + u32 cyc = clocksource_32k.read(&clocksource_32k); + return cyc_to_fixed_sched_clock(&cd, cyc, (u32)~0, SC_MULT, SC_SHIFT); +} + +static void notrace omap_update_sched_clock(void) +{ + u32 cyc = clocksource_32k.read(&clocksource_32k); + update_sched_clock(&cd, cyc, (u32)~0); } /** @@ -171,6 +188,9 @@ static int __init omap_init_clocksource_32k(void) if (clocksource_register_hz(&clocksource_32k, 32768)) printk(err, clocksource_32k.name); + + init_fixed_sched_clock(&cd, omap_update_sched_clock, 32, + 32768, SC_MULT, SC_SHIFT); } return 0; } -- cgit v0.10.2 From f06a1624621527ef597ae4b3b795553fc1b2eff2 Mon Sep 17 00:00:00 2001 From: Russell King Date: Wed, 15 Dec 2010 21:55:06 +0000 Subject: ARM: orion: convert sched_clock() to use new infrastructure Convert orion platforms to use the new sched_clock() infrastructure for extending 32bit counters to full 64-bit nanoseconds. Acked-by: Nicolas Pitre Signed-off-by: Russell King diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 726279f..92e8c01 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -997,6 +997,7 @@ config PLAT_IOP config PLAT_ORION bool + select HAVE_SCHED_CLOCK config PLAT_PXA bool diff --git a/arch/arm/plat-orion/time.c b/arch/arm/plat-orion/time.c index 123f96f..c3da247 100644 --- a/arch/arm/plat-orion/time.c +++ b/arch/arm/plat-orion/time.c @@ -13,11 +13,11 @@ #include #include -#include #include #include #include #include +#include #include #include #include @@ -44,52 +44,26 @@ static u32 ticks_per_jiffy; /* * Orion's sched_clock implementation. It has a resolution of - * at least 7.5ns (133MHz TCLK) and a maximum value of 834 days. - * - * Because the hardware timer period is quite short (21 secs if - * 200MHz TCLK) and because cnt32_to_63() needs to be called at - * least once per half period to work properly, a kernel timer is - * set up to ensure this requirement is always met. + * at least 7.5ns (133MHz TCLK). */ -#define TCLK2NS_SCALE_FACTOR 8 - -static unsigned long tclk2ns_scale; +static DEFINE_CLOCK_DATA(cd); unsigned long long notrace sched_clock(void) { - unsigned long long v = cnt32_to_63(0xffffffff - readl(TIMER0_VAL)); - return (v * tclk2ns_scale) >> TCLK2NS_SCALE_FACTOR; + u32 cyc = 0xffffffff - readl(TIMER0_VAL); + return cyc_to_sched_clock(&cd, cyc, (u32)~0); } -static struct timer_list cnt32_to_63_keepwarm_timer; -static void cnt32_to_63_keepwarm(unsigned long data) +static void notrace orion_update_sched_clock(void) { - mod_timer(&cnt32_to_63_keepwarm_timer, round_jiffies(jiffies + data)); - (void) sched_clock(); + u32 cyc = 0xffffffff - readl(TIMER0_VAL); + update_sched_clock(&cd, cyc, (u32)~0); } static void __init setup_sched_clock(unsigned long tclk) { - unsigned long long v; - unsigned long data; - - v = NSEC_PER_SEC; - v <<= TCLK2NS_SCALE_FACTOR; - v += tclk/2; - do_div(v, tclk); - /* - * We want an even value to automatically clear the top bit - * returned by cnt32_to_63() without an additional run time - * instruction. So if the LSB is 1 then round it up. - */ - if (v & 1) - v++; - tclk2ns_scale = v; - - data = (0xffffffffUL / tclk / 2 - 2) * HZ; - setup_timer(&cnt32_to_63_keepwarm_timer, cnt32_to_63_keepwarm, data); - mod_timer(&cnt32_to_63_keepwarm_timer, round_jiffies(jiffies + data)); + init_sched_clock(&cd, orion_update_sched_clock, 32, tclk); } /* -- cgit v0.10.2 From 1da0c89c66753860ccfe81eb327c25db46c2a24a Mon Sep 17 00:00:00 2001 From: Russell King Date: Wed, 15 Dec 2010 21:56:47 +0000 Subject: ARM: versatile: convert sched_clock() to use new infrastructure Convert versatile platforms to use the new sched_clock() infrastructure for extending 32bit counters to full 64-bit nanoseconds. Tested-by: Will Deacon Signed-off-by: Russell King diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 92e8c01..34311f4 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -236,6 +236,7 @@ config ARCH_REALVIEW bool "ARM Ltd. RealView family" select ARM_AMBA select COMMON_CLKDEV + select HAVE_SCHED_CLOCK select ICST select GENERIC_CLOCKEVENTS select ARCH_WANT_OPTIONAL_GPIOLIB @@ -250,6 +251,7 @@ config ARCH_VERSATILE select ARM_AMBA select ARM_VIC select COMMON_CLKDEV + select HAVE_SCHED_CLOCK select ICST select GENERIC_CLOCKEVENTS select ARCH_WANT_OPTIONAL_GPIOLIB diff --git a/arch/arm/mach-realview/core.c b/arch/arm/mach-realview/core.c index 07c0815..3d653e0 100644 --- a/arch/arm/mach-realview/core.c +++ b/arch/arm/mach-realview/core.c @@ -52,6 +52,8 @@ #include #include +#include + #include "core.h" /* used by entry-macro.S and platsmp.c */ @@ -658,6 +660,12 @@ void realview_leds_event(led_event_t ledevt) #endif /* CONFIG_LEDS */ /* + * The sched_clock counter + */ +#define REFCOUNTER (__io_address(REALVIEW_SYS_BASE) + \ + REALVIEW_SYS_24MHz_OFFSET) + +/* * Where is the timer (VA)? */ void __iomem *timer0_va_base; @@ -672,6 +680,8 @@ void __init realview_timer_init(unsigned int timer_irq) { u32 val; + versatile_sched_clock_init(REFCOUNTER, 24000000); + /* * set clock frequency: * REALVIEW_REFCLK is 32KHz diff --git a/arch/arm/mach-versatile/core.c b/arch/arm/mach-versatile/core.c index e38acb0..56cdc22 100644 --- a/arch/arm/mach-versatile/core.c +++ b/arch/arm/mach-versatile/core.c @@ -51,6 +51,8 @@ #include #include +#include + #include "core.h" /* @@ -886,6 +888,12 @@ void __init versatile_init(void) } /* + * The sched_clock counter + */ +#define REFCOUNTER (__io_address(VERSATILE_SYS_BASE) + \ + VERSATILE_SYS_24MHz_OFFSET) + +/* * Where is the timer (VA)? */ #define TIMER0_VA_BASE __io_address(VERSATILE_TIMER0_1_BASE) @@ -900,6 +908,8 @@ static void __init versatile_timer_init(void) { u32 val; + versatile_sched_clock_init(REFCOUNTER, 24000000); + /* * set clock frequency: * VERSATILE_REFCLK is 32KHz diff --git a/arch/arm/plat-versatile/include/plat/sched_clock.h b/arch/arm/plat-versatile/include/plat/sched_clock.h new file mode 100644 index 0000000..5c3e4fc --- /dev/null +++ b/arch/arm/plat-versatile/include/plat/sched_clock.h @@ -0,0 +1,6 @@ +#ifndef ARM_PLAT_SCHED_CLOCK_H +#define ARM_PLAT_SCHED_CLOCK_H + +void versatile_sched_clock_init(void __iomem *, unsigned long); + +#endif diff --git a/arch/arm/plat-versatile/sched-clock.c b/arch/arm/plat-versatile/sched-clock.c index 42efd14..3d6a4c2 100644 --- a/arch/arm/plat-versatile/sched-clock.c +++ b/arch/arm/plat-versatile/sched-clock.c @@ -18,37 +18,41 @@ * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ -#include #include #include -#include -#include -#include +#include +#include -#ifdef VERSATILE_SYS_BASE -#define REFCOUNTER (__io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_24MHz_OFFSET) -#endif - -#ifdef REALVIEW_SYS_BASE -#define REFCOUNTER (__io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_24MHz_OFFSET) -#endif +static DEFINE_CLOCK_DATA(cd); +static void __iomem *ctr; /* - * This is the Realview and Versatile sched_clock implementation. This - * has a resolution of 41.7ns, and a maximum value of about 35583 days. - * - * The return value is guaranteed to be monotonic in that range as - * long as there is always less than 89 seconds between successive - * calls to this function. + * Constants generated by clocks_calc_mult_shift(m, s, 24MHz, NSEC_PER_SEC, 60). + * This gives a resolution of about 41ns and a wrap period of about 178s. */ +#define SC_MULT 2796202667u +#define SC_SHIFT 26 + unsigned long long notrace sched_clock(void) { - unsigned long long v = cnt32_to_63(readl(REFCOUNTER)); + if (ctr) { + u32 cyc = readl(ctr); + return cyc_to_fixed_sched_clock(&cd, cyc, (u32)~0, + SC_MULT, SC_SHIFT); + } else + return 0; +} - /* the <<1 gets rid of the cnt_32_to_63 top bit saving on a bic insn */ - v *= 125<<1; - do_div(v, 3<<1); +static void notrace versatile_update_sched_clock(void) +{ + u32 cyc = readl(ctr); + update_sched_clock(&cd, cyc, (u32)~0); +} - return v; +void __init versatile_sched_clock_init(void __iomem *reg, unsigned long rate) +{ + ctr = reg; + init_fixed_sched_clock(&cd, versatile_update_sched_clock, + 32, rate, SC_MULT, SC_SHIFT); } -- cgit v0.10.2 From 0af85dda39d9b673aca8c0ebae004ea70f3efc93 Mon Sep 17 00:00:00 2001 From: Russell King Date: Wed, 15 Dec 2010 21:58:50 +0000 Subject: ARM: vexpress: add sched_clock() for Versatile Express Add a sched_clock() implementation to Versatile Express using the new sched_clock() infrastructure for extending 32bit counters to full 64-bit nanoseconds. Tested-by: Will Deacon Signed-off-by: Russell King diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 34311f4..17b5ff0 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -268,6 +268,7 @@ config ARCH_VEXPRESS select COMMON_CLKDEV select GENERIC_CLOCKEVENTS select HAVE_CLK + select HAVE_SCHED_CLOCK select ICST select PLAT_VERSATILE help diff --git a/arch/arm/mach-vexpress/v2m.c b/arch/arm/mach-vexpress/v2m.c index 7eaa232..8c28310 100644 --- a/arch/arm/mach-vexpress/v2m.c +++ b/arch/arm/mach-vexpress/v2m.c @@ -22,6 +22,8 @@ #include #include +#include + #include #include "core.h" @@ -50,6 +52,8 @@ void __init v2m_map_io(struct map_desc *tile, size_t num) static void __init v2m_timer_init(void) { + versatile_sched_clock_init(MMIO_P2V(V2M_SYS_24MHZ), 24000000); + writel(0, MMIO_P2V(V2M_TIMER0) + TIMER_CTRL); writel(0, MMIO_P2V(V2M_TIMER1) + TIMER_CTRL); diff --git a/arch/arm/plat-versatile/Makefile b/arch/arm/plat-versatile/Makefile index 5cf88e8..8bb6ba6 100644 --- a/arch/arm/plat-versatile/Makefile +++ b/arch/arm/plat-versatile/Makefile @@ -1,7 +1,8 @@ obj-y := clock.o obj-$(CONFIG_ARM_TIMER_SP804) += timer-sp.o -obj-$(CONFIG_ARCH_REALVIEW) += sched-clock.o -obj-$(CONFIG_ARCH_VERSATILE) += sched-clock.o +ifneq ($(CONFIG_ARCH_INTEGRATOR),y) +obj-y += sched-clock.o +endif ifeq ($(CONFIG_LEDS_CLASS),y) obj-$(CONFIG_ARCH_REALVIEW) += leds.o obj-$(CONFIG_ARCH_VERSATILE) += leds.o -- cgit v0.10.2