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-rw-r--r--arch/arm/kernel/Makefile4
-rw-r--r--arch/arm/kernel/entry-armv.S37
-rw-r--r--arch/arm/kernel/entry-common.S11
-rw-r--r--arch/arm/kernel/entry-header.S16
-rw-r--r--arch/arm/kernel/head-common.S4
-rw-r--r--arch/arm/kernel/init_task.c5
-rw-r--r--arch/arm/kernel/kprobes.c19
-rw-r--r--arch/arm/kernel/setup.c2
-rw-r--r--arch/arm/kernel/smp.c23
-rw-r--r--arch/arm/kernel/smp_twd.c4
-rw-r--r--arch/arm/kernel/sys_arm.c1
-rw-r--r--arch/arm/kernel/tcm.c246
-rw-r--r--arch/arm/kernel/tcm.h17
-rw-r--r--arch/arm/kernel/time.c1
-rw-r--r--arch/arm/kernel/traps.c81
-rw-r--r--arch/arm/kernel/vmlinux.lds.S57
16 files changed, 440 insertions, 88 deletions
diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile
index 3213c93..79087dd 100644
--- a/arch/arm/kernel/Makefile
+++ b/arch/arm/kernel/Makefile
@@ -2,7 +2,8 @@
# Makefile for the linux kernel.
#
-AFLAGS_head.o := -DTEXT_OFFSET=$(TEXT_OFFSET)
+CPPFLAGS_vmlinux.lds := -DTEXT_OFFSET=$(TEXT_OFFSET)
+AFLAGS_head.o := -DTEXT_OFFSET=$(TEXT_OFFSET)
ifdef CONFIG_DYNAMIC_FTRACE
CFLAGS_REMOVE_ftrace.o = -pg
@@ -34,6 +35,7 @@ obj-$(CONFIG_OABI_COMPAT) += sys_oabi-compat.o
obj-$(CONFIG_ARM_THUMBEE) += thumbee.o
obj-$(CONFIG_KGDB) += kgdb.o
obj-$(CONFIG_ARM_UNWIND) += unwind.o
+obj-$(CONFIG_HAVE_TCM) += tcm.o
obj-$(CONFIG_CRUNCH) += crunch.o crunch-bits.o
AFLAGS_crunch-bits.o := -Wa,-mcpu=ep9312
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S
index 3d727a8..322410b 100644
--- a/arch/arm/kernel/entry-armv.S
+++ b/arch/arm/kernel/entry-armv.S
@@ -272,7 +272,15 @@ __und_svc:
@
@ r0 - instruction
@
+#ifndef CONFIG_THUMB2_KERNEL
ldr r0, [r2, #-4]
+#else
+ ldrh r0, [r2, #-2] @ Thumb instruction at LR - 2
+ and r9, r0, #0xf800
+ cmp r9, #0xe800 @ 32-bit instruction if xx >= 0
+ ldrhhs r9, [r2] @ bottom 16 bits
+ orrhs r0, r9, r0, lsl #16
+#endif
adr r9, BSYM(1f)
bl call_fpe
@@ -303,22 +311,16 @@ __pabt_svc:
tst r3, #PSR_I_BIT
biceq r9, r9, #PSR_I_BIT
- @
- @ set args, then call main handler
- @
- @ r0 - address of faulting instruction
- @ r1 - pointer to registers on stack
- @
-#ifdef MULTI_PABORT
mov r0, r2 @ pass address of aborted instruction.
+#ifdef MULTI_PABORT
ldr r4, .LCprocfns
mov lr, pc
ldr pc, [r4, #PROCESSOR_PABT_FUNC]
#else
- CPU_PABORT_HANDLER(r0, r2)
+ bl CPU_PABORT_HANDLER
#endif
msr cpsr_c, r9 @ Maybe enable interrupts
- mov r1, sp @ regs
+ mov r2, sp @ regs
bl do_PrefetchAbort @ call abort handler
@
@@ -678,7 +680,9 @@ ENTRY(fp_enter)
.word no_fp
.previous
-no_fp: mov pc, lr
+ENTRY(no_fp)
+ mov pc, lr
+ENDPROC(no_fp)
__und_usr_unknown:
enable_irq
@@ -691,16 +695,16 @@ ENDPROC(__und_usr_unknown)
__pabt_usr:
usr_entry
-#ifdef MULTI_PABORT
mov r0, r2 @ pass address of aborted instruction.
+#ifdef MULTI_PABORT
ldr r4, .LCprocfns
mov lr, pc
ldr pc, [r4, #PROCESSOR_PABT_FUNC]
#else
- CPU_PABORT_HANDLER(r0, r2)
+ bl CPU_PABORT_HANDLER
#endif
enable_irq @ Enable interrupts
- mov r1, sp @ regs
+ mov r2, sp @ regs
bl do_PrefetchAbort @ call abort handler
UNWIND(.fnend )
/* fall through */
@@ -734,13 +738,6 @@ ENTRY(__switch_to)
#ifdef CONFIG_MMU
ldr r6, [r2, #TI_CPU_DOMAIN]
#endif
-#if __LINUX_ARM_ARCH__ >= 6
-#ifdef CONFIG_CPU_32v6K
- clrex
-#else
- strex r5, r4, [ip] @ Clear exclusive monitor
-#endif
-#endif
#if defined(CONFIG_HAS_TLS_REG)
mcr p15, 0, r3, c13, c0, 3 @ set TLS register
#elif !defined(CONFIG_TLS_REG_EMUL)
diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S
index 807cfeb..f0fe95b 100644
--- a/arch/arm/kernel/entry-common.S
+++ b/arch/arm/kernel/entry-common.S
@@ -126,7 +126,7 @@ ENTRY(__gnu_mcount_nc)
cmp r0, r2
bne gnu_trace
ldmia sp!, {r0-r3, ip, lr}
- bx ip
+ mov pc, ip
gnu_trace:
ldr r1, [sp, #20] @ lr of instrumented routine
@@ -135,7 +135,7 @@ gnu_trace:
mov lr, pc
mov pc, r2
ldmia sp!, {r0-r3, ip, lr}
- bx ip
+ mov pc, ip
ENTRY(mcount)
stmdb sp!, {r0-r3, lr}
@@ -425,13 +425,6 @@ sys_mmap2:
#endif
ENDPROC(sys_mmap2)
-ENTRY(pabort_ifar)
- mrc p15, 0, r0, cr6, cr0, 2
-ENTRY(pabort_noifar)
- mov pc, lr
-ENDPROC(pabort_ifar)
-ENDPROC(pabort_noifar)
-
#ifdef CONFIG_OABI_COMPAT
/*
diff --git a/arch/arm/kernel/entry-header.S b/arch/arm/kernel/entry-header.S
index a4eaf4f..ac34c0d 100644
--- a/arch/arm/kernel/entry-header.S
+++ b/arch/arm/kernel/entry-header.S
@@ -76,13 +76,27 @@
#ifndef CONFIG_THUMB2_KERNEL
.macro svc_exit, rpsr
msr spsr_cxsf, \rpsr
+#if defined(CONFIG_CPU_32v6K)
+ clrex @ clear the exclusive monitor
ldmia sp, {r0 - pc}^ @ load r0 - pc, cpsr
+#elif defined (CONFIG_CPU_V6)
+ ldr r0, [sp]
+ strex r1, r2, [sp] @ clear the exclusive monitor
+ ldmib sp, {r1 - pc}^ @ load r1 - pc, cpsr
+#else
+ ldmia sp, {r0 - pc}^ @ load r0 - pc, cpsr
+#endif
.endm
.macro restore_user_regs, fast = 0, offset = 0
ldr r1, [sp, #\offset + S_PSR] @ get calling cpsr
ldr lr, [sp, #\offset + S_PC]! @ get pc
msr spsr_cxsf, r1 @ save in spsr_svc
+#if defined(CONFIG_CPU_32v6K)
+ clrex @ clear the exclusive monitor
+#elif defined (CONFIG_CPU_V6)
+ strex r1, r2, [sp] @ clear the exclusive monitor
+#endif
.if \fast
ldmdb sp, {r1 - lr}^ @ get calling r1 - lr
.else
@@ -98,6 +112,7 @@
.endm
#else /* CONFIG_THUMB2_KERNEL */
.macro svc_exit, rpsr
+ clrex @ clear the exclusive monitor
ldr r0, [sp, #S_SP] @ top of the stack
ldr r1, [sp, #S_PC] @ return address
tst r0, #4 @ orig stack 8-byte aligned?
@@ -110,6 +125,7 @@
.endm
.macro restore_user_regs, fast = 0, offset = 0
+ clrex @ clear the exclusive monitor
mov r2, sp
load_user_sp_lr r2, r3, \offset + S_SP @ calling sp, lr
ldr r1, [sp, #\offset + S_PSR] @ get calling cpsr
diff --git a/arch/arm/kernel/head-common.S b/arch/arm/kernel/head-common.S
index 93ad576..885a721 100644
--- a/arch/arm/kernel/head-common.S
+++ b/arch/arm/kernel/head-common.S
@@ -13,6 +13,7 @@
#define ATAG_CORE 0x54410001
#define ATAG_CORE_SIZE ((2*4 + 3*4) >> 2)
+#define ATAG_CORE_SIZE_EMPTY ((2*4) >> 2)
.align 2
.type __switch_data, %object
@@ -251,7 +252,8 @@ __vet_atags:
bne 1f
ldr r5, [r2, #0] @ is first tag ATAG_CORE?
- subs r5, r5, #ATAG_CORE_SIZE
+ cmp r5, #ATAG_CORE_SIZE
+ cmpne r5, #ATAG_CORE_SIZE_EMPTY
bne 1f
ldr r5, [r2, #4]
ldr r6, =ATAG_CORE
diff --git a/arch/arm/kernel/init_task.c b/arch/arm/kernel/init_task.c
index 3f47086..e7cbb50 100644
--- a/arch/arm/kernel/init_task.c
+++ b/arch/arm/kernel/init_task.c
@@ -24,9 +24,8 @@ static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
*
* The things we do for performance..
*/
-union thread_union init_thread_union
- __attribute__((__section__(".data.init_task"))) =
- { INIT_THREAD_INFO(init_task) };
+union thread_union init_thread_union __init_task_data =
+ { INIT_THREAD_INFO(init_task) };
/*
* Initial task structure.
diff --git a/arch/arm/kernel/kprobes.c b/arch/arm/kernel/kprobes.c
index f692efd..60c62c3 100644
--- a/arch/arm/kernel/kprobes.c
+++ b/arch/arm/kernel/kprobes.c
@@ -22,6 +22,7 @@
#include <linux/kernel.h>
#include <linux/kprobes.h>
#include <linux/module.h>
+#include <linux/stop_machine.h>
#include <linux/stringify.h>
#include <asm/traps.h>
#include <asm/cacheflush.h>
@@ -83,10 +84,24 @@ void __kprobes arch_arm_kprobe(struct kprobe *p)
flush_insns(p->addr, 1);
}
+/*
+ * The actual disarming is done here on each CPU and synchronized using
+ * stop_machine. This synchronization is necessary on SMP to avoid removing
+ * a probe between the moment the 'Undefined Instruction' exception is raised
+ * and the moment the exception handler reads the faulting instruction from
+ * memory.
+ */
+int __kprobes __arch_disarm_kprobe(void *p)
+{
+ struct kprobe *kp = p;
+ *kp->addr = kp->opcode;
+ flush_insns(kp->addr, 1);
+ return 0;
+}
+
void __kprobes arch_disarm_kprobe(struct kprobe *p)
{
- *p->addr = p->opcode;
- flush_insns(p->addr, 1);
+ stop_machine(__arch_disarm_kprobe, p, &cpu_online_map);
}
void __kprobes arch_remove_kprobe(struct kprobe *p)
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index d4d4f77..c6c57b6 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -45,6 +45,7 @@
#include "compat.h"
#include "atags.h"
+#include "tcm.h"
#ifndef MEM_SIZE
#define MEM_SIZE (16*1024*1024)
@@ -749,6 +750,7 @@ void __init setup_arch(char **cmdline_p)
#endif
cpu_init();
+ tcm_init();
/*
* Set up various architecture-specific pointers
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index de885fd..57162af 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -36,6 +36,7 @@
#include <asm/tlbflush.h>
#include <asm/ptrace.h>
#include <asm/localtimer.h>
+#include <asm/smp_plat.h>
/*
* as from 2.5, kernels no longer have an init_tasks structure
@@ -153,7 +154,7 @@ int __cpuinit __cpu_up(unsigned int cpu)
/*
* __cpu_disable runs on the processor to be shutdown.
*/
-int __cpuexit __cpu_disable(void)
+int __cpu_disable(void)
{
unsigned int cpu = smp_processor_id();
struct task_struct *p;
@@ -189,7 +190,7 @@ int __cpuexit __cpu_disable(void)
read_lock(&tasklist_lock);
for_each_process(p) {
if (p->mm)
- cpu_clear(cpu, p->mm->cpu_vm_mask);
+ cpumask_clear_cpu(cpu, mm_cpumask(p->mm));
}
read_unlock(&tasklist_lock);
@@ -200,7 +201,7 @@ int __cpuexit __cpu_disable(void)
* called on the thread which is asking for a CPU to be shutdown -
* waits until shutdown has completed, or it is timed out.
*/
-void __cpuexit __cpu_die(unsigned int cpu)
+void __cpu_die(unsigned int cpu)
{
if (!platform_cpu_kill(cpu))
printk("CPU%u: unable to kill\n", cpu);
@@ -214,7 +215,7 @@ void __cpuexit __cpu_die(unsigned int cpu)
* of the other hotplug-cpu capable cores, so presumably coming
* out of idle fixes this.
*/
-void __cpuexit cpu_die(void)
+void __ref cpu_die(void)
{
unsigned int cpu = smp_processor_id();
@@ -257,7 +258,7 @@ asmlinkage void __cpuinit secondary_start_kernel(void)
atomic_inc(&mm->mm_users);
atomic_inc(&mm->mm_count);
current->active_mm = mm;
- cpu_set(cpu, mm->cpu_vm_mask);
+ cpumask_set_cpu(cpu, mm_cpumask(mm));
cpu_switch_mm(mm->pgd, mm);
enter_lazy_tlb(mm, current);
local_flush_tlb_all();
@@ -586,12 +587,6 @@ struct tlb_args {
unsigned long ta_end;
};
-/* all SMP configurations have the extended CPUID registers */
-static inline int tlb_ops_need_broadcast(void)
-{
- return ((read_cpuid_ext(CPUID_EXT_MMFR3) >> 12) & 0xf) < 2;
-}
-
static inline void ipi_flush_tlb_all(void *ignored)
{
local_flush_tlb_all();
@@ -643,7 +638,7 @@ void flush_tlb_all(void)
void flush_tlb_mm(struct mm_struct *mm)
{
if (tlb_ops_need_broadcast())
- on_each_cpu_mask(ipi_flush_tlb_mm, mm, 1, &mm->cpu_vm_mask);
+ on_each_cpu_mask(ipi_flush_tlb_mm, mm, 1, mm_cpumask(mm));
else
local_flush_tlb_mm(mm);
}
@@ -654,7 +649,7 @@ void flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr)
struct tlb_args ta;
ta.ta_vma = vma;
ta.ta_start = uaddr;
- on_each_cpu_mask(ipi_flush_tlb_page, &ta, 1, &vma->vm_mm->cpu_vm_mask);
+ on_each_cpu_mask(ipi_flush_tlb_page, &ta, 1, mm_cpumask(vma->vm_mm));
} else
local_flush_tlb_page(vma, uaddr);
}
@@ -677,7 +672,7 @@ void flush_tlb_range(struct vm_area_struct *vma,
ta.ta_vma = vma;
ta.ta_start = start;
ta.ta_end = end;
- on_each_cpu_mask(ipi_flush_tlb_range, &ta, 1, &vma->vm_mm->cpu_vm_mask);
+ on_each_cpu_mask(ipi_flush_tlb_range, &ta, 1, mm_cpumask(vma->vm_mm));
} else
local_flush_tlb_range(vma, start, end);
}
diff --git a/arch/arm/kernel/smp_twd.c b/arch/arm/kernel/smp_twd.c
index d8c88c6..a73a34d 100644
--- a/arch/arm/kernel/smp_twd.c
+++ b/arch/arm/kernel/smp_twd.c
@@ -166,10 +166,12 @@ void __cpuinit twd_timer_setup(struct clock_event_device *clk)
clockevents_register_device(clk);
}
+#ifdef CONFIG_HOTPLUG_CPU
/*
* take a local timer down
*/
-void __cpuexit twd_timer_stop(void)
+void twd_timer_stop(void)
{
__raw_writel(0, twd_base + TWD_TIMER_CONTROL);
}
+#endif
diff --git a/arch/arm/kernel/sys_arm.c b/arch/arm/kernel/sys_arm.c
index b3ec641..78ecaac 100644
--- a/arch/arm/kernel/sys_arm.c
+++ b/arch/arm/kernel/sys_arm.c
@@ -25,7 +25,6 @@
#include <linux/mman.h>
#include <linux/fs.h>
#include <linux/file.h>
-#include <linux/utsname.h>
#include <linux/ipc.h>
#include <linux/uaccess.h>
diff --git a/arch/arm/kernel/tcm.c b/arch/arm/kernel/tcm.c
new file mode 100644
index 0000000..e503038
--- /dev/null
+++ b/arch/arm/kernel/tcm.c
@@ -0,0 +1,246 @@
+/*
+ * Copyright (C) 2008-2009 ST-Ericsson AB
+ * License terms: GNU General Public License (GPL) version 2
+ * TCM memory handling for ARM systems
+ *
+ * Author: Linus Walleij <linus.walleij@stericsson.com>
+ * Author: Rickard Andersson <rickard.andersson@stericsson.com>
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/stddef.h>
+#include <linux/ioport.h>
+#include <linux/genalloc.h>
+#include <linux/string.h> /* memcpy */
+#include <asm/page.h> /* PAGE_SHIFT */
+#include <asm/cputype.h>
+#include <asm/mach/map.h>
+#include <mach/memory.h>
+#include "tcm.h"
+
+/* Scream and warn about misuse */
+#if !defined(ITCM_OFFSET) || !defined(ITCM_END) || \
+ !defined(DTCM_OFFSET) || !defined(DTCM_END)
+#error "TCM support selected but offsets not defined!"
+#endif
+
+static struct gen_pool *tcm_pool;
+
+/* TCM section definitions from the linker */
+extern char __itcm_start, __sitcm_text, __eitcm_text;
+extern char __dtcm_start, __sdtcm_data, __edtcm_data;
+
+/*
+ * TCM memory resources
+ */
+static struct resource dtcm_res = {
+ .name = "DTCM RAM",
+ .start = DTCM_OFFSET,
+ .end = DTCM_END,
+ .flags = IORESOURCE_MEM
+};
+
+static struct resource itcm_res = {
+ .name = "ITCM RAM",
+ .start = ITCM_OFFSET,
+ .end = ITCM_END,
+ .flags = IORESOURCE_MEM
+};
+
+static struct map_desc dtcm_iomap[] __initdata = {
+ {
+ .virtual = DTCM_OFFSET,
+ .pfn = __phys_to_pfn(DTCM_OFFSET),
+ .length = (DTCM_END - DTCM_OFFSET + 1),
+ .type = MT_UNCACHED
+ }
+};
+
+static struct map_desc itcm_iomap[] __initdata = {
+ {
+ .virtual = ITCM_OFFSET,
+ .pfn = __phys_to_pfn(ITCM_OFFSET),
+ .length = (ITCM_END - ITCM_OFFSET + 1),
+ .type = MT_UNCACHED
+ }
+};
+
+/*
+ * Allocate a chunk of TCM memory
+ */
+void *tcm_alloc(size_t len)
+{
+ unsigned long vaddr;
+
+ if (!tcm_pool)
+ return NULL;
+
+ vaddr = gen_pool_alloc(tcm_pool, len);
+ if (!vaddr)
+ return NULL;
+
+ return (void *) vaddr;
+}
+EXPORT_SYMBOL(tcm_alloc);
+
+/*
+ * Free a chunk of TCM memory
+ */
+void tcm_free(void *addr, size_t len)
+{
+ gen_pool_free(tcm_pool, (unsigned long) addr, len);
+}
+EXPORT_SYMBOL(tcm_free);
+
+
+static void __init setup_tcm_bank(u8 type, u32 offset, u32 expected_size)
+{
+ const int tcm_sizes[16] = { 0, -1, -1, 4, 8, 16, 32, 64, 128,
+ 256, 512, 1024, -1, -1, -1, -1 };
+ u32 tcm_region;
+ int tcm_size;
+
+ /* Read the special TCM region register c9, 0 */
+ if (!type)
+ asm("mrc p15, 0, %0, c9, c1, 0"
+ : "=r" (tcm_region));
+ else
+ asm("mrc p15, 0, %0, c9, c1, 1"
+ : "=r" (tcm_region));
+
+ tcm_size = tcm_sizes[(tcm_region >> 2) & 0x0f];
+ if (tcm_size < 0) {
+ pr_err("CPU: %sTCM of unknown size!\n",
+ type ? "I" : "D");
+ } else {
+ pr_info("CPU: found %sTCM %dk @ %08x, %senabled\n",
+ type ? "I" : "D",
+ tcm_size,
+ (tcm_region & 0xfffff000U),
+ (tcm_region & 1) ? "" : "not ");
+ }
+
+ if (tcm_size != expected_size) {
+ pr_crit("CPU: %sTCM was detected %dk but expected %dk!\n",
+ type ? "I" : "D",
+ tcm_size,
+ expected_size);
+ /* Adjust to the expected size? what can we do... */
+ }
+
+ /* Force move the TCM bank to where we want it, enable */
+ tcm_region = offset | (tcm_region & 0x00000ffeU) | 1;
+
+ if (!type)
+ asm("mcr p15, 0, %0, c9, c1, 0"
+ : /* No output operands */
+ : "r" (tcm_region));
+ else
+ asm("mcr p15, 0, %0, c9, c1, 1"
+ : /* No output operands */
+ : "r" (tcm_region));
+
+ pr_debug("CPU: moved %sTCM %dk to %08x, enabled\n",
+ type ? "I" : "D",
+ tcm_size,
+ (tcm_region & 0xfffff000U));
+}
+
+/*
+ * This initializes the TCM memory
+ */
+void __init tcm_init(void)
+{
+ u32 tcm_status = read_cpuid_tcmstatus();
+ char *start;
+ char *end;
+ char *ram;
+
+ /* Setup DTCM if present */
+ if (tcm_status & (1 << 16)) {
+ setup_tcm_bank(0, DTCM_OFFSET,
+ (DTCM_END - DTCM_OFFSET + 1) >> 10);
+ request_resource(&iomem_resource, &dtcm_res);
+ iotable_init(dtcm_iomap, 1);
+ /* Copy data from RAM to DTCM */
+ start = &__sdtcm_data;
+ end = &__edtcm_data;
+ ram = &__dtcm_start;
+ memcpy(start, ram, (end-start));
+ pr_debug("CPU DTCM: copied data from %p - %p\n", start, end);
+ }
+
+ /* Setup ITCM if present */
+ if (tcm_status & 1) {
+ setup_tcm_bank(1, ITCM_OFFSET,
+ (ITCM_END - ITCM_OFFSET + 1) >> 10);
+ request_resource(&iomem_resource, &itcm_res);
+ iotable_init(itcm_iomap, 1);
+ /* Copy code from RAM to ITCM */
+ start = &__sitcm_text;
+ end = &__eitcm_text;
+ ram = &__itcm_start;
+ memcpy(start, ram, (end-start));
+ pr_debug("CPU ITCM: copied code from %p - %p\n", start, end);
+ }
+}
+
+/*
+ * This creates the TCM memory pool and has to be done later,
+ * during the core_initicalls, since the allocator is not yet
+ * up and running when the first initialization runs.
+ */
+static int __init setup_tcm_pool(void)
+{
+ u32 tcm_status = read_cpuid_tcmstatus();
+ u32 dtcm_pool_start = (u32) &__edtcm_data;
+ u32 itcm_pool_start = (u32) &__eitcm_text;
+ int ret;
+
+ /*
+ * Set up malloc pool, 2^2 = 4 bytes granularity since
+ * the TCM is sometimes just 4 KiB. NB: pages and cache
+ * line alignments does not matter in TCM!
+ */
+ tcm_pool = gen_pool_create(2, -1);
+
+ pr_debug("Setting up TCM memory pool\n");
+
+ /* Add the rest of DTCM to the TCM pool */
+ if (tcm_status & (1 << 16)) {
+ if (dtcm_pool_start < DTCM_END) {
+ ret = gen_pool_add(tcm_pool, dtcm_pool_start,
+ DTCM_END - dtcm_pool_start + 1, -1);
+ if (ret) {
+ pr_err("CPU DTCM: could not add DTCM " \
+ "remainder to pool!\n");
+ return ret;
+ }
+ pr_debug("CPU DTCM: Added %08x bytes @ %08x to " \
+ "the TCM memory pool\n",
+ DTCM_END - dtcm_pool_start + 1,
+ dtcm_pool_start);
+ }
+ }
+
+ /* Add the rest of ITCM to the TCM pool */
+ if (tcm_status & 1) {
+ if (itcm_pool_start < ITCM_END) {
+ ret = gen_pool_add(tcm_pool, itcm_pool_start,
+ ITCM_END - itcm_pool_start + 1, -1);
+ if (ret) {
+ pr_err("CPU ITCM: could not add ITCM " \
+ "remainder to pool!\n");
+ return ret;
+ }
+ pr_debug("CPU ITCM: Added %08x bytes @ %08x to " \
+ "the TCM memory pool\n",
+ ITCM_END - itcm_pool_start + 1,
+ itcm_pool_start);
+ }
+ }
+ return 0;
+}
+
+core_initcall(setup_tcm_pool);
diff --git a/arch/arm/kernel/tcm.h b/arch/arm/kernel/tcm.h
new file mode 100644
index 0000000..8015ad4
--- /dev/null
+++ b/arch/arm/kernel/tcm.h
@@ -0,0 +1,17 @@
+/*
+ * Copyright (C) 2008-2009 ST-Ericsson AB
+ * License terms: GNU General Public License (GPL) version 2
+ * TCM memory handling for ARM systems
+ *
+ * Author: Linus Walleij <linus.walleij@stericsson.com>
+ * Author: Rickard Andersson <rickard.andersson@stericsson.com>
+ */
+
+#ifdef CONFIG_HAVE_TCM
+void __init tcm_init(void);
+#else
+/* No TCM support, just blank inlines to be optimized out */
+inline void tcm_init(void)
+{
+}
+#endif
diff --git a/arch/arm/kernel/time.c b/arch/arm/kernel/time.c
index 4cdc4a0..d38cdf2 100644
--- a/arch/arm/kernel/time.c
+++ b/arch/arm/kernel/time.c
@@ -21,6 +21,7 @@
#include <linux/interrupt.h>
#include <linux/time.h>
#include <linux/init.h>
+#include <linux/sched.h>
#include <linux/smp.h>
#include <linux/timex.h>
#include <linux/errno.h>
diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c
index 57eb0f6..f838f36 100644
--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -45,21 +45,21 @@ static int __init user_debug_setup(char *str)
__setup("user_debug=", user_debug_setup);
#endif
-static void dump_mem(const char *str, unsigned long bottom, unsigned long top);
+static void dump_mem(const char *, const char *, unsigned long, unsigned long);
void dump_backtrace_entry(unsigned long where, unsigned long from, unsigned long frame)
{
#ifdef CONFIG_KALLSYMS
- printk("[<%08lx>] ", where);
- print_symbol("(%s) ", where);
- printk("from [<%08lx>] ", from);
- print_symbol("(%s)\n", from);
+ char sym1[KSYM_SYMBOL_LEN], sym2[KSYM_SYMBOL_LEN];
+ sprint_symbol(sym1, where);
+ sprint_symbol(sym2, from);
+ printk("[<%08lx>] (%s) from [<%08lx>] (%s)\n", where, sym1, from, sym2);
#else
printk("Function entered at [<%08lx>] from [<%08lx>]\n", where, from);
#endif
if (in_exception_text(where))
- dump_mem("Exception stack", frame + 4, frame + 4 + sizeof(struct pt_regs));
+ dump_mem("", "Exception stack", frame + 4, frame + 4 + sizeof(struct pt_regs));
}
#ifndef CONFIG_ARM_UNWIND
@@ -81,9 +81,10 @@ static int verify_stack(unsigned long sp)
/*
* Dump out the contents of some memory nicely...
*/
-static void dump_mem(const char *str, unsigned long bottom, unsigned long top)
+static void dump_mem(const char *lvl, const char *str, unsigned long bottom,
+ unsigned long top)
{
- unsigned long p = bottom & ~31;
+ unsigned long first;
mm_segment_t fs;
int i;
@@ -95,33 +96,37 @@ static void dump_mem(const char *str, unsigned long bottom, unsigned long top)
fs = get_fs();
set_fs(KERNEL_DS);
- printk("%s(0x%08lx to 0x%08lx)\n", str, bottom, top);
+ printk("%s%s(0x%08lx to 0x%08lx)\n", lvl, str, bottom, top);
- for (p = bottom & ~31; p < top;) {
- printk("%04lx: ", p & 0xffff);
+ for (first = bottom & ~31; first < top; first += 32) {
+ unsigned long p;
+ char str[sizeof(" 12345678") * 8 + 1];
- for (i = 0; i < 8; i++, p += 4) {
- unsigned int val;
+ memset(str, ' ', sizeof(str));
+ str[sizeof(str) - 1] = '\0';
- if (p < bottom || p >= top)
- printk(" ");
- else {
- __get_user(val, (unsigned long *)p);
- printk("%08x ", val);
+ for (p = first, i = 0; i < 8 && p < top; i++, p += 4) {
+ if (p >= bottom && p < top) {
+ unsigned long val;
+ if (__get_user(val, (unsigned long *)p) == 0)
+ sprintf(str + i * 9, " %08lx", val);
+ else
+ sprintf(str + i * 9, " ????????");
}
}
- printk ("\n");
+ printk("%s%04lx:%s\n", lvl, first & 0xffff, str);
}
set_fs(fs);
}
-static void dump_instr(struct pt_regs *regs)
+static void dump_instr(const char *lvl, struct pt_regs *regs)
{
unsigned long addr = instruction_pointer(regs);
const int thumb = thumb_mode(regs);
const int width = thumb ? 4 : 8;
mm_segment_t fs;
+ char str[sizeof("00000000 ") * 5 + 2 + 1], *p = str;
int i;
/*
@@ -132,7 +137,6 @@ static void dump_instr(struct pt_regs *regs)
fs = get_fs();
set_fs(KERNEL_DS);
- printk("Code: ");
for (i = -4; i < 1; i++) {
unsigned int val, bad;
@@ -142,13 +146,14 @@ static void dump_instr(struct pt_regs *regs)
bad = __get_user(val, &((u32 *)addr)[i]);
if (!bad)
- printk(i == 0 ? "(%0*x) " : "%0*x ", width, val);
+ p += sprintf(p, i == 0 ? "(%0*x) " : "%0*x ",
+ width, val);
else {
- printk("bad PC value.");
+ p += sprintf(p, "bad PC value");
break;
}
}
- printk("\n");
+ printk("%sCode: %s\n", lvl, str);
set_fs(fs);
}
@@ -224,18 +229,19 @@ static void __die(const char *str, int err, struct thread_info *thread, struct p
struct task_struct *tsk = thread->task;
static int die_counter;
- printk("Internal error: %s: %x [#%d]" S_PREEMPT S_SMP "\n",
+ printk(KERN_EMERG "Internal error: %s: %x [#%d]" S_PREEMPT S_SMP "\n",
str, err, ++die_counter);
+ sysfs_printk_last_file();
print_modules();
__show_regs(regs);
- printk("Process %s (pid: %d, stack limit = 0x%p)\n",
- tsk->comm, task_pid_nr(tsk), thread + 1);
+ printk(KERN_EMERG "Process %.*s (pid: %d, stack limit = 0x%p)\n",
+ TASK_COMM_LEN, tsk->comm, task_pid_nr(tsk), thread + 1);
if (!user_mode(regs) || in_interrupt()) {
- dump_mem("Stack: ", regs->ARM_sp,
+ dump_mem(KERN_EMERG, "Stack: ", regs->ARM_sp,
THREAD_SIZE + (unsigned long)task_stack_page(tsk));
dump_backtrace(regs, tsk);
- dump_instr(regs);
+ dump_instr(KERN_EMERG, regs);
}
}
@@ -250,13 +256,14 @@ NORET_TYPE void die(const char *str, struct pt_regs *regs, int err)
oops_enter();
- console_verbose();
spin_lock_irq(&die_lock);
+ console_verbose();
bust_spinlocks(1);
__die(str, err, thread, regs);
bust_spinlocks(0);
add_taint(TAINT_DIE);
spin_unlock_irq(&die_lock);
+ oops_exit();
if (in_interrupt())
panic("Fatal exception in interrupt");
@@ -264,7 +271,6 @@ NORET_TYPE void die(const char *str, struct pt_regs *regs, int err)
if (panic_on_oops)
panic("Fatal exception");
- oops_exit();
do_exit(SIGSEGV);
}
@@ -349,7 +355,7 @@ asmlinkage void __exception do_undefinstr(struct pt_regs *regs)
if (user_debug & UDBG_UNDEFINED) {
printk(KERN_INFO "%s (%d): undefined instruction: pc=%p\n",
current->comm, task_pid_nr(current), pc);
- dump_instr(regs);
+ dump_instr(KERN_INFO, regs);
}
#endif
@@ -400,7 +406,7 @@ static int bad_syscall(int n, struct pt_regs *regs)
if (user_debug & UDBG_SYSCALL) {
printk(KERN_ERR "[%d] %s: obsolete system call %08x.\n",
task_pid_nr(current), current->comm, n);
- dump_instr(regs);
+ dump_instr(KERN_ERR, regs);
}
#endif
@@ -418,12 +424,14 @@ static int bad_syscall(int n, struct pt_regs *regs)
static inline void
do_cache_op(unsigned long start, unsigned long end, int flags)
{
+ struct mm_struct *mm = current->active_mm;
struct vm_area_struct *vma;
if (end < start || flags)
return;
- vma = find_vma(current->active_mm, start);
+ down_read(&mm->mmap_sem);
+ vma = find_vma(mm, start);
if (vma && vma->vm_start < end) {
if (start < vma->vm_start)
start = vma->vm_start;
@@ -432,6 +440,7 @@ do_cache_op(unsigned long start, unsigned long end, int flags)
flush_cache_user_range(vma, start, end);
}
+ up_read(&mm->mmap_sem);
}
/*
@@ -576,7 +585,7 @@ asmlinkage int arm_syscall(int no, struct pt_regs *regs)
if (user_debug & UDBG_SYSCALL) {
printk("[%d] %s: arm syscall %d\n",
task_pid_nr(current), current->comm, no);
- dump_instr(regs);
+ dump_instr("", regs);
if (user_mode(regs)) {
__show_regs(regs);
c_backtrace(regs->ARM_fp, processor_mode(regs));
@@ -653,7 +662,7 @@ baddataabort(int code, unsigned long instr, struct pt_regs *regs)
if (user_debug & UDBG_BADABORT) {
printk(KERN_ERR "[%d] %s: bad data abort: code %d instr 0x%08lx\n",
task_pid_nr(current), current->comm, code, instr);
- dump_instr(regs);
+ dump_instr(KERN_ERR, regs);
show_pte(current->mm, addr);
}
#endif
diff --git a/arch/arm/kernel/vmlinux.lds.S b/arch/arm/kernel/vmlinux.lds.S
index 5cc4812..aecf87df 100644
--- a/arch/arm/kernel/vmlinux.lds.S
+++ b/arch/arm/kernel/vmlinux.lds.S
@@ -199,6 +199,63 @@ SECTIONS
}
_edata_loc = __data_loc + SIZEOF(.data);
+#ifdef CONFIG_HAVE_TCM
+ /*
+ * We align everything to a page boundary so we can
+ * free it after init has commenced and TCM contents have
+ * been copied to its destination.
+ */
+ .tcm_start : {
+ . = ALIGN(PAGE_SIZE);
+ __tcm_start = .;
+ __itcm_start = .;
+ }
+
+ /*
+ * Link these to the ITCM RAM
+ * Put VMA to the TCM address and LMA to the common RAM
+ * and we'll upload the contents from RAM to TCM and free
+ * the used RAM after that.
+ */
+ .text_itcm ITCM_OFFSET : AT(__itcm_start)
+ {
+ __sitcm_text = .;
+ *(.tcm.text)
+ *(.tcm.rodata)
+ . = ALIGN(4);
+ __eitcm_text = .;
+ }
+
+ /*
+ * Reset the dot pointer, this is needed to create the
+ * relative __dtcm_start below (to be used as extern in code).
+ */
+ . = ADDR(.tcm_start) + SIZEOF(.tcm_start) + SIZEOF(.text_itcm);
+
+ .dtcm_start : {
+ __dtcm_start = .;
+ }
+
+ /* TODO: add remainder of ITCM as well, that can be used for data! */
+ .data_dtcm DTCM_OFFSET : AT(__dtcm_start)
+ {
+ . = ALIGN(4);
+ __sdtcm_data = .;
+ *(.tcm.data)
+ . = ALIGN(4);
+ __edtcm_data = .;
+ }
+
+ /* Reset the dot pointer or the linker gets confused */
+ . = ADDR(.dtcm_start) + SIZEOF(.data_dtcm);
+
+ /* End marker for freeing TCM copy in linked object */
+ .tcm_end : AT(ADDR(.dtcm_start) + SIZEOF(.data_dtcm)){
+ . = ALIGN(PAGE_SIZE);
+ __tcm_end = .;
+ }
+#endif
+
.bss : {
__bss_start = .; /* BSS */
*(.bss)
generated by cgit v0.10.2 at 2024-11-11 14:54:50 (GMT)