From 54b0264ec8c6e90f0413ad30e2f91c65e7844613 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Wed, 16 Nov 2011 18:17:40 +0000 Subject: x86/sfi: Kill the IRQ as id hack Nothing should now need it so take it out Signed-off-by: Alan Cox Signed-off-by: Ingo Molnar diff --git a/arch/x86/platform/mrst/mrst.c b/arch/x86/platform/mrst/mrst.c index b1489a0..6a21f60 100644 --- a/arch/x86/platform/mrst/mrst.c +++ b/arch/x86/platform/mrst/mrst.c @@ -802,8 +802,7 @@ static void __init sfi_handle_ipc_dev(struct sfi_device_table_entry *entry) if (mrst_has_msic()) return; - /* ID as IRQ is a hack that will go away */ - pdev = platform_device_alloc(entry->name, entry->irq); + pdev = platform_device_alloc(entry->name, 0); if (pdev == NULL) { pr_err("out of memory for SFI platform device '%s'.\n", entry->name); -- cgit v0.10.2 From 1ea7c6737c8f68453f55c894b3d07d7f48fcbef8 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Thu, 10 Nov 2011 13:29:14 +0000 Subject: x86/config: Revamp configuration for MID devices This follows on from the patch applied in 3.2rc1 which creates an INTEL_MID configuration. We can now add the entry for Medfield specific code. After this is merged the final patch will be submitted which moves the rest of the device Kconfig dependancies to MRST/MEDFIELD/INTEL_MID as appropriate. Signed-off-by: Alan Cox Signed-off-by: Ingo Molnar diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index cb9a104..9e7a361 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -419,6 +419,23 @@ config X86_MRST nor standard legacy replacement devices/features. e.g. Moorestown does not contain i8259, i8254, HPET, legacy BIOS, most of the io ports. +config X86_MDFLD + bool "Medfield MID platform" + depends on PCI + depends on PCI_GOANY + depends on X86_IO_APIC + select APB_TIMER + select I2C + select SPI + select INTEL_SCU_IPC + select X86_PLATFORM_DEVICES + ---help--- + Medfield is Intel's Low Power Intel Architecture (LPIA) based Moblin + Internet Device(MID) platform. + Unlike standard x86 PCs, Medfield does not have many legacy devices + nor standard legacy replacement devices/features. e.g. Medfield does + not contain i8259, i8254, HPET, legacy BIOS, most of the io ports. + endif config X86_RDC321X diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug index bf56e17..28c3c73 100644 --- a/arch/x86/Kconfig.debug +++ b/arch/x86/Kconfig.debug @@ -43,9 +43,9 @@ config EARLY_PRINTK with klogd/syslogd or the X server. You should normally N here, unless you want to debug such a crash. -config EARLY_PRINTK_MRST - bool "Early printk for MRST platform support" - depends on EARLY_PRINTK && X86_MRST +config EARLY_PRINTK_INTEL_MID + bool "Early printk for Intel MID platform support" + depends on EARLY_PRINTK && X86_INTEL_MID config EARLY_PRINTK_DBGP bool "Early printk via EHCI debug port" diff --git a/arch/x86/kernel/early_printk.c b/arch/x86/kernel/early_printk.c index cd28a35..7a53da0 100644 --- a/arch/x86/kernel/early_printk.c +++ b/arch/x86/kernel/early_printk.c @@ -240,7 +240,7 @@ static int __init setup_early_printk(char *buf) if (!strncmp(buf, "xen", 3)) early_console_register(&xenboot_console, keep); #endif -#ifdef CONFIG_EARLY_PRINTK_MRST +#ifdef CONFIG_EARLY_PRINTK_INTEL_MID if (!strncmp(buf, "mrst", 4)) { mrst_early_console_init(); early_console_register(&early_mrst_console, keep); diff --git a/arch/x86/platform/mrst/Makefile b/arch/x86/platform/mrst/Makefile index 1ea3877..ddeec73 100644 --- a/arch/x86/platform/mrst/Makefile +++ b/arch/x86/platform/mrst/Makefile @@ -1,4 +1,4 @@ obj-$(CONFIG_X86_MRST) += mrst.o obj-$(CONFIG_X86_MRST) += vrtc.o -obj-$(CONFIG_EARLY_PRINTK_MRST) += early_printk_mrst.o +obj-$(CONFIG_EARLY_PRINTK_INTEL_MID) += early_printk_mrst.o obj-$(CONFIG_X86_MRST) += pmu.o -- cgit v0.10.2 From b565201cf75210614903ef2ae5917b4379681647 Mon Sep 17 00:00:00 2001 From: Jack Steiner Date: Tue, 15 Nov 2011 15:33:56 -0800 Subject: x86: Reduce clock calibration time during slave cpu startup Reduce the startup time for slave cpus. Adds hooks for an arch-specific function for clock calibration. These hooks are used on x86. If a newly started cpu has the same phys_proc_id as a core already active, uses the TSC for the delay loop and has a CONSTANT_TSC, use the already-calculated value of loops_per_jiffy. This patch reduces the time required to start slave cpus on a 4096 cpu system from: 465 sec OLD 62 sec NEW This reduces boot time on a 4096p system by almost 7 minutes. Nice... Signed-off-by: Jack Steiner Cc: "H. Peter Anvin" Cc: John Stultz [fix CONFIG_SMP=n build] Signed-off-by: Andrew Morton Signed-off-by: Ingo Molnar diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index 9f548cb..00eef55 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -207,23 +207,29 @@ static void __cpuinit smp_callin(void) * Need to setup vector mappings before we enable interrupts. */ setup_vector_irq(smp_processor_id()); + + /* + * Save our processor parameters. Note: this information + * is needed for clock calibration. + */ + smp_store_cpu_info(cpuid); + /* * Get our bogomips. + * Update loops_per_jiffy in cpu_data. Previous call to + * smp_store_cpu_info() stored a value that is close but not as + * accurate as the value just calculated. * * Need to enable IRQs because it can take longer and then * the NMI watchdog might kill us. */ local_irq_enable(); calibrate_delay(); + cpu_data(cpuid).loops_per_jiffy = loops_per_jiffy; local_irq_disable(); pr_debug("Stack at about %p\n", &cpuid); /* - * Save our processor parameters - */ - smp_store_cpu_info(cpuid); - - /* * This must be done before setting cpu_online_mask * or calling notify_cpu_starting. */ diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c index db48336..490fb33 100644 --- a/arch/x86/kernel/tsc.c +++ b/arch/x86/kernel/tsc.c @@ -995,3 +995,23 @@ void __init tsc_init(void) check_system_tsc_reliable(); } +#ifdef CONFIG_SMP +/* + * If we have a constant TSC and are using the TSC for the delay loop, + * we can skip clock calibration if another cpu in the same socket has already + * been calibrated. This assumes that CONSTANT_TSC applies to all + * cpus in the socket - this should be a safe assumption. + */ +unsigned long __cpuinit calibrate_delay_is_known(void) +{ + int i, cpu = smp_processor_id(); + + if (!tsc_disabled && !cpu_has(&cpu_data(cpu), X86_FEATURE_CONSTANT_TSC)) + return 0; + + for_each_online_cpu(i) + if (cpu_data(i).phys_proc_id == cpu_data(cpu).phys_proc_id) + return cpu_data(i).loops_per_jiffy; + return 0; +} +#endif diff --git a/init/calibrate.c b/init/calibrate.c index 24df797..5f117ca 100644 --- a/init/calibrate.c +++ b/init/calibrate.c @@ -246,6 +246,19 @@ recalibrate: static DEFINE_PER_CPU(unsigned long, cpu_loops_per_jiffy) = { 0 }; +/* + * Check if cpu calibration delay is already known. For example, + * some processors with multi-core sockets may have all cores + * with the same calibration delay. + * + * Architectures should override this function if a faster calibration + * method is available. + */ +unsigned long __attribute__((weak)) __cpuinit calibrate_delay_is_known(void) +{ + return 0; +} + void __cpuinit calibrate_delay(void) { unsigned long lpj; @@ -265,6 +278,8 @@ void __cpuinit calibrate_delay(void) lpj = lpj_fine; pr_info("Calibrating delay loop (skipped), " "value calculated using timer frequency.. "); + } else if ((lpj = calibrate_delay_is_known())) { + ; } else if ((lpj = calibrate_delay_direct()) != 0) { if (!printed) pr_info("Calibrating delay using timer " -- cgit v0.10.2 From f9b15df466ba923a5832c9121ad8327ccf5483ef Mon Sep 17 00:00:00 2001 From: Alessandro Rubini Date: Sat, 29 Oct 2011 00:48:42 +0200 Subject: x86/Kconfig: Cyclone-timer depends on x86-summit CONFIG_X86_CYCLONE_TIMER depends on CONFIG_X86_32_NON_STANDARD, which forces drivers/clocksource/cyclone.c to be compiled. The file doesn't do anything unless enabled by arch/x86/kernel/apic/summit_32.c Make CONFIG_X86_CYCLONE_TIMER depend by X86_SUMMIT instead, to avoid unnecessary code in other non-standard systems. Signed-off-by: Alessandro Rubini Cc: john stultz Link: http://lkml.kernel.org/r/20111028224842.GA7582@mail.gnudd.com Signed-off-by: Ingo Molnar diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 9e7a361..faf39a0 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -633,7 +633,7 @@ config X86_SUMMIT_NUMA config X86_CYCLONE_TIMER def_bool y - depends on X86_32_NON_STANDARD + depends on X86_SUMMIT source "arch/x86/Kconfig.cpu" -- cgit v0.10.2 From 3e8f9451d3db669d7c0d8b330d4f5770149d90d5 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Thu, 15 Dec 2011 22:19:41 +0000 Subject: x86: Fix INTEL_MID silly Doh.. pass the brown paper bags - preferably filled with mince pies.. This fixes occasional build failures. Signed-off-by: Alan Cox Link: http://lkml.kernel.org/n/tip-r0oc1knlvzuqr69artaeq8s8@git.kernel.org [ extended the changelog a bit ] Signed-off-by: Ingo Molnar diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index faf39a0..2b54a2f 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -429,6 +429,7 @@ config X86_MDFLD select SPI select INTEL_SCU_IPC select X86_PLATFORM_DEVICES + select X86_INTEL_MID ---help--- Medfield is Intel's Low Power Intel Architecture (LPIA) based Moblin Internet Device(MID) platform. -- cgit v0.10.2 From a0c3832a578c84d4a93c61e22cb09c99fa9447ea Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Sat, 17 Dec 2011 21:57:25 +0000 Subject: x86/apb: Fix configuration constraints The APB timer requires SFI, SCU and MID support Reported-by: Ingo Molnar Signed-off-by: Alan Cox Link: http://lkml.kernel.org/r/20111217215719.3743.93550.stgit@bob.linux.org.uk Signed-off-by: Ingo Molnar diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 2b54a2f..ca4ee76 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -665,6 +665,7 @@ config APB_TIMER def_bool y if MRST prompt "Langwell APB Timer Support" if X86_MRST select DW_APB_TIMER + depends on X86_INTEL_MID && SFI help APB timer is the replacement for 8254, HPET on X86 MID platforms. The APBT provides a stable time base on SMP -- cgit v0.10.2 From c95aaeffd8a41bde48270040abe3cab8ea328787 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Sat, 17 Dec 2011 17:42:27 +0000 Subject: x86/intel/scu/ipc: Match the changes in the x86 configuration We need to depend on INTEL_MID because the SCU is Moorestown and Medfield. Signed-off-by: Alan Cox Cc: mjg@redhat.com Link: http://lkml.kernel.org/r/20111217174215.7096.7786.stgit@bob.linux.org.uk Signed-off-by: Ingo Molnar diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig index 7f43cf8..f995e6e 100644 --- a/drivers/platform/x86/Kconfig +++ b/drivers/platform/x86/Kconfig @@ -639,7 +639,7 @@ config ACPI_CMPC config INTEL_SCU_IPC bool "Intel SCU IPC Support" - depends on X86_MRST + depends on X86_INTEL_MID default y ---help--- IPC is used to bridge the communications between kernel and SCU on -- cgit v0.10.2 From 933b9463a0ef75da681747b2dac06c1754465372 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Sat, 17 Dec 2011 17:43:40 +0000 Subject: x86/intel config: Revamp configuration to allow for Moorestown and Medfield This sets all up the other bits that need to be INTEL_MID specific rather than Moorestown specific. Signed-off-by: Alan Cox Link: http://lkml.kernel.org/r/20111217174318.7207.91543.stgit@bob.linux.org.uk Signed-off-by: Ingo Molnar diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index ca4ee76..c3c9343 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -662,8 +662,8 @@ config HPET_EMULATE_RTC depends on HPET_TIMER && (RTC=y || RTC=m || RTC_DRV_CMOS=m || RTC_DRV_CMOS=y) config APB_TIMER - def_bool y if MRST - prompt "Langwell APB Timer Support" if X86_MRST + def_bool y if X86_INTEL_MID + prompt "Intel MID APB Timer Support" if X86_INTEL_MID select DW_APB_TIMER depends on X86_INTEL_MID && SFI help diff --git a/arch/x86/include/asm/fixmap.h b/arch/x86/include/asm/fixmap.h index 460c74e..4da3c0c 100644 --- a/arch/x86/include/asm/fixmap.h +++ b/arch/x86/include/asm/fixmap.h @@ -117,7 +117,7 @@ enum fixed_addresses { #endif FIX_TEXT_POKE1, /* reserve 2 pages for text_poke() */ FIX_TEXT_POKE0, /* first page is last, because allocation is backward */ -#ifdef CONFIG_X86_MRST +#ifdef CONFIG_X86_INTEL_MID FIX_LNW_VRTC, #endif __end_of_permanent_fixed_addresses, diff --git a/arch/x86/include/asm/setup.h b/arch/x86/include/asm/setup.h index 9756551..d0f19f9 100644 --- a/arch/x86/include/asm/setup.h +++ b/arch/x86/include/asm/setup.h @@ -47,7 +47,7 @@ extern void reserve_standard_io_resources(void); extern void i386_reserve_resources(void); extern void setup_default_timer_irq(void); -#ifdef CONFIG_X86_MRST +#ifdef CONFIG_X86_INTEL_MID extern void x86_mrst_early_setup(void); #else static inline void x86_mrst_early_setup(void) { } diff --git a/arch/x86/pci/Makefile b/arch/x86/pci/Makefile index 6b8759f..75b06f3 100644 --- a/arch/x86/pci/Makefile +++ b/arch/x86/pci/Makefile @@ -15,7 +15,7 @@ obj-$(CONFIG_X86_VISWS) += visws.o obj-$(CONFIG_X86_NUMAQ) += numaq_32.o -obj-$(CONFIG_X86_MRST) += mrst.o +obj-$(CONFIG_X86_INTEL_MID) += mrst.o obj-y += common.o early.o obj-y += amd_bus.o bus_numa.o diff --git a/arch/x86/platform/mrst/Makefile b/arch/x86/platform/mrst/Makefile index ddeec73..7baed51 100644 --- a/arch/x86/platform/mrst/Makefile +++ b/arch/x86/platform/mrst/Makefile @@ -1,4 +1,4 @@ -obj-$(CONFIG_X86_MRST) += mrst.o -obj-$(CONFIG_X86_MRST) += vrtc.o +obj-$(CONFIG_X86_INTEL_MID) += mrst.o +obj-$(CONFIG_X86_INTEL_MID) += vrtc.o obj-$(CONFIG_EARLY_PRINTK_INTEL_MID) += early_printk_mrst.o obj-$(CONFIG_X86_MRST) += pmu.o diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index 53eb4e5..3a125b8 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -498,9 +498,9 @@ config RTC_DRV_CMOS will be called rtc-cmos. config RTC_DRV_VRTC - tristate "Virtual RTC for Moorestown platforms" - depends on X86_MRST - default y if X86_MRST + tristate "Virtual RTC for Intel MID platforms" + depends on X86_INTEL_MID + default y if X86_INTEL_MID help Say "yes" here to get direct support for the real time clock -- cgit v0.10.2 From d79a8869d8a4b565b12a88faeff834b09a36368c Mon Sep 17 00:00:00 2001 From: Michael Demeter Date: Thu, 15 Dec 2011 22:31:23 +0000 Subject: x86/mrst: Add additional debug prints for pb_keys Added additional debug output that we always seem to add during power ons to validate firmware operation. Signed-off-by: Michael Demeter Signed-off-by: Kirill A. Shutemov Signed-off-by: Alan Cox Link: http://lkml.kernel.org/r/20111215223116.10166.50803.stgit@bob.linux.org.uk [ fixed line breaks, formatting and commit title. ] Signed-off-by: Ingo Molnar diff --git a/arch/x86/platform/mrst/mrst.c b/arch/x86/platform/mrst/mrst.c index 6a21f60..b6a33d2 100644 --- a/arch/x86/platform/mrst/mrst.c +++ b/arch/x86/platform/mrst/mrst.c @@ -983,6 +983,7 @@ static int __init pb_keys_init(void) num = sizeof(gpio_button) / sizeof(struct gpio_keys_button); for (i = 0; i < num; i++) { gb[i].gpio = get_gpio_by_name(gb[i].desc); + pr_debug("info[%2d]: name = %s, gpio = %d\n", i, gb[i].desc, gb[i].gpio); if (gb[i].gpio == -1) continue; -- cgit v0.10.2 From 7c9c3a1e5fc8728e948b8fa3cbcfcfb86db3afda Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Thu, 29 Dec 2011 14:43:16 +0000 Subject: x86/intel config: Fix the APB_TIMER selection Seems Kconfig SELECT isn't selecting things hierarchically when selected. config APB_TIMER def_bool y if X86_INTEL_MID prompt "Intel MID APB Timer Support" if X86_INTEL_MID select DW_APB_TIMER depends on X86_INTEL_MID && SFI when we select APB_TIMER doesn't select DW_APB_TIMER so do it by hand. Signed-off-by: Alan Cox Link: http://lkml.kernel.org/n/tip-kpnaimplltk6d1lolusqj3ae@git.kernel.org Signed-off-by: Ingo Molnar diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 07620bc91..78fbb34 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -409,12 +409,14 @@ config X86_MRST depends on PCI depends on PCI_GOANY depends on X86_IO_APIC + select X86_INTEL_MID + select SFI + select DW_APB_TIMER select APB_TIMER select I2C select SPI select INTEL_SCU_IPC select X86_PLATFORM_DEVICES - select X86_INTEL_MID ---help--- Moorestown is Intel's Low Power Intel Architecture (LPIA) based Moblin Internet Device(MID) platform. Moorestown consists of two chips: @@ -428,12 +430,14 @@ config X86_MDFLD depends on PCI depends on PCI_GOANY depends on X86_IO_APIC + select X86_INTEL_MID + select SFI + select DW_APB_TIMER select APB_TIMER select I2C select SPI select INTEL_SCU_IPC select X86_PLATFORM_DEVICES - select X86_INTEL_MID ---help--- Medfield is Intel's Low Power Intel Architecture (LPIA) based Moblin Internet Device(MID) platform. -- cgit v0.10.2