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tsc: initial implementation of timekeeper source

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Matheus
2024-09-29 16:30:08 -03:00
parent 0fff338065
commit c3eef02d50
5 changed files with 83 additions and 4 deletions
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kernel-src/include/time.h
+1 -1
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@@ -47,7 +47,7 @@ static inline time_t timespec_us(timespec_t a) {
static inline timespec_t timespec_from_us(time_t us) {
timespec_t ts = {
.s = us / 1000000,
.ns = (us % 1000000) * 100
.ns = (us * 1000) % 1000000000
};
return ts;
kernel-src/include/x86-64/arch/cpuid.h
+4 -3
View File
@@ -18,6 +18,7 @@ typedef struct {
#define CPUID_VENDOR_INTEL "GenuineIntel"
#define CPUID_LEAF_0x80000001_EDX_SYSCALL (1 << 11)
#define CPUID_LEAF_1_EDX_TSC (1 << 4)
#define CPUID_LEAF_1_EDX_HTT (1 << 28)
static inline void cpuid_with_ecx(uint32_t leaf, uint32_t ecx, cpuid_results_t *cpuid_results) {
@@ -90,9 +91,9 @@ static inline bool cpuid_leaf_0x4_available(void) {
if (cpuid_base_max_leaf() < 0x4)
return false;
unsigned int eax = 0, ebx = 0, ecx = 0, edx = 0;
__get_cpuid_count(0x4, 0, &eax, &ebx, &ecx, &edx);
return eax != 0;
cpuid_results_t cpuid_results;
cpuid_with_ecx(0x4, 0, &cpuid_results);
return cpuid_results.eax != 0;
}
#endif