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kernel: Rework cpuidle module

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* Create new interface for cpuidle modules (similar to the cpufreq
   interface)
 * Generic cpuidle module is no longer needed
 * Fix and update Intel C-State module
This commit is contained in:
Pawel Dziepak
2013-11-25 23:50:27 +01:00
parent 0e94a12f8e
commit 7db89e8dc3
22 changed files with 356 additions and 339 deletions
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headers/private/kernel/arch/cpu.h
-1
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@@ -41,7 +41,6 @@ ssize_t arch_cpu_user_strlcpy(char *to, const char *from, size_t size,
status_t arch_cpu_user_memset(void *s, char c, size_t count,
addr_t *faultHandler);
void arch_cpu_idle(void);
void arch_cpu_sync_icache(void *address, size_t length);
void arch_cpu_memory_read_barrier(void);
headers/private/kernel/arch/x86/arch_cpu.h
+26 -3
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@@ -185,6 +185,10 @@
| IA32_FEATURE_AMD_EXT_RDTSCP \
| IA32_FEATURE_AMD_EXT_LONG)
// x86 defined features from cpuid eax 5, ecx register
#define IA32_FEATURE_POWER_MWAIT (1 << 0)
#define IA32_FEATURE_INTERRUPT_MWAIT (1 << 1)
// x86 defined features from cpuid eax 6, eax register
// reference http://www.intel.com/Assets/en_US/PDF/appnote/241618.pdf (Table 5-11)
#define IA32_FEATURE_DTS (1 << 0) //Digital Thermal Sensor
@@ -199,6 +203,9 @@
#define IA32_FEATURE_APERFMPERF (1 << 0) //IA32_APERF, IA32_MPERF
#define IA32_FEATURE_EPB (1 << 3) //IA32_ENERGY_PERF_BIAS
// x86 defined features from cpuid eax 0x80000007, edx register
#define IA32_FEATURE_INVARIANT_TSC (1 << 8)
// cr4 flags
#define IA32_CR4_PAE (1UL << 5)
#define IA32_CR4_GLOBAL_PAGES (1UL << 7)
@@ -282,8 +289,10 @@ enum x86_feature_type {
FEATURE_EXT, // cpuid eax=1, edx register
FEATURE_EXT_AMD_ECX, // cpuid eax=0x80000001, ecx register (AMD)
FEATURE_EXT_AMD, // cpuid eax=0x80000001, edx register (AMD)
FEATURE_5_ECX, // cpuid eax=5, ecx register
FEATURE_6_EAX, // cpuid eax=6, eax registers
FEATURE_6_ECX, // cpuid eax=6, ecx registers
FEATURE_EXT_7_EDX, // cpuid eax=0x80000007, edx register
FEATURE_NUM
};
@@ -330,9 +339,6 @@ typedef struct arch_cpu_info {
} arch_cpu_info;
#undef PAUSE
#define PAUSE() asm volatile ("pause;")
#define nop() __asm__ ("nop"::)
#define x86_read_cr0() ({ \
@@ -426,6 +432,9 @@ typedef struct arch_cpu_info {
})
extern void (*gCpuIdleFunc)(void);
#ifdef __cplusplus
extern "C" {
#endif
@@ -478,6 +487,20 @@ void x86_fnsave_swap(void* oldFpuState, const void* newFpuState);
#endif
static inline void
arch_cpu_idle(void)
{
gCpuIdleFunc();
}
static inline void
arch_cpu_pause(void)
{
asm volatile("pause");
}
#ifdef __cplusplus
} // extern "C" {
#endif