projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * Intel specific MCE features. | |
| 3 | * Copyright 2004 Zwane Mwaikambo <zwane@linuxpower.ca> | |
| 4 | */ | |
| 5 | ||
| 6 | #include <linux/init.h> | |
| 7 | #include <linux/interrupt.h> | |
| 8 | #include <linux/percpu.h> | |
| 9 | #include <asm/processor.h> | |
| 10 | #include <asm/msr.h> | |
| 11 | #include <asm/mce.h> | |
| 12 | #include <asm/hw_irq.h> | |
| 95833c83 | 13 | #include <asm/idle.h> |
| 15d5f839 | 14 | #include <asm/therm_throt.h> |
| 1da177e4 LT |
15 | |
| 16 | asmlinkage void smp_thermal_interrupt(void) | |
| 17 | { | |
| 15d5f839 | 18 | __u64 msr_val; |
| 1da177e4 LT |
19 | |
| 20 | ack_APIC_irq(); | |
| 21 | ||
| 95833c83 | 22 | exit_idle(); |
| 1da177e4 | 23 | irq_enter(); |
| 15d5f839 DZ |
24 | |
| 25 | rdmsrl(MSR_IA32_THERM_STATUS, msr_val); | |
| 26 | if (therm_throt_process(msr_val & 1)) | |
| 27 | mce_log_therm_throt_event(smp_processor_id(), msr_val); | |
| 28 | ||
| 8ae93669 | 29 | inc_irq_stat(irq_thermal_count); |
| 1da177e4 LT |
30 | irq_exit(); |
| 31 | } | |
| 32 | ||
| e6982c67 | 33 | static void __cpuinit intel_init_thermal(struct cpuinfo_x86 *c) |
| 1da177e4 LT |
34 | { |
| 35 | u32 l, h; | |
| 36 | int tm2 = 0; | |
| 37 | unsigned int cpu = smp_processor_id(); | |
| 38 | ||
| 39 | if (!cpu_has(c, X86_FEATURE_ACPI)) | |
| 40 | return; | |
| 41 | ||
| 42 | if (!cpu_has(c, X86_FEATURE_ACC)) | |
| 43 | return; | |
| 44 | ||
| 45 | /* first check if TM1 is already enabled by the BIOS, in which | |
| 46 | * case there might be some SMM goo which handles it, so we can't even | |
| 47 | * put a handler since it might be delivered via SMI already. | |
| 48 | */ | |
| 49 | rdmsr(MSR_IA32_MISC_ENABLE, l, h); | |
| 50 | h = apic_read(APIC_LVTTHMR); | |
| 51 | if ((l & (1 << 3)) && (h & APIC_DM_SMI)) { | |
| 52 | printk(KERN_DEBUG | |
| 53 | "CPU%d: Thermal monitoring handled by SMI\n", cpu); | |
| 54 | return; | |
| 55 | } | |
| 56 | ||
| 57 | if (cpu_has(c, X86_FEATURE_TM2) && (l & (1 << 13))) | |
| 58 | tm2 = 1; | |
| 59 | ||
| 60 | if (h & APIC_VECTOR_MASK) { | |
| 61 | printk(KERN_DEBUG | |
| 62 | "CPU%d: Thermal LVT vector (%#x) already " | |
| 63 | "installed\n", cpu, (h & APIC_VECTOR_MASK)); | |
| 64 | return; | |
| 65 | } | |
| 66 | ||
| 67 | h = THERMAL_APIC_VECTOR; | |
| 68 | h |= (APIC_DM_FIXED | APIC_LVT_MASKED); | |
| 11a8e778 | 69 | apic_write(APIC_LVTTHMR, h); |
| 1da177e4 LT |
70 | |
| 71 | rdmsr(MSR_IA32_THERM_INTERRUPT, l, h); | |
| 72 | wrmsr(MSR_IA32_THERM_INTERRUPT, l | 0x03, h); | |
| 73 | ||
| 74 | rdmsr(MSR_IA32_MISC_ENABLE, l, h); | |
| 75 | wrmsr(MSR_IA32_MISC_ENABLE, l | (1 << 3), h); | |
| 76 | ||
| 77 | l = apic_read(APIC_LVTTHMR); | |
| 11a8e778 | 78 | apic_write(APIC_LVTTHMR, l & ~APIC_LVT_MASKED); |
| 1da177e4 LT |
79 | printk(KERN_INFO "CPU%d: Thermal monitoring enabled (%s)\n", |
| 80 | cpu, tm2 ? "TM2" : "TM1"); | |
| 3222b36f DZ |
81 | |
| 82 | /* enable thermal throttle processing */ | |
| 83 | atomic_set(&therm_throt_en, 1); | |
| 1da177e4 LT |
84 | return; |
| 85 | } | |
| 86 | ||
| e6982c67 | 87 | void __cpuinit mce_intel_feature_init(struct cpuinfo_x86 *c) |
| 1da177e4 LT |
88 | { |
| 89 | intel_init_thermal(c); | |
| 90 | } |