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Marvin
2026-09-28 17:46:45 +02:00
committed by Marvin Friedrich
parent 09926f45ee
commit 4a20a5b0af
62 changed files with 1266 additions and 554 deletions
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arch/x86_64/tsc.c
+3 -2
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@@ -53,8 +53,9 @@ void tsc_init() {
// Check for the TSC info leaf.
bool has_tsc_leaf = false;
struct cpuid tsc_leaf = {0};
if (asm_cpuid(0x8000'0000, 0).eax >= 0x15) {
if (asm_cpuid(0, 0).eax >= 0x15) {
tsc_leaf = asm_cpuid(0x15, 0);
has_tsc_leaf = true;
}
if (clock_available()) {
@@ -69,7 +70,7 @@ void tsc_init() {
// since at this point we have at least the HPET timer.
if (tsc_leaf.ecx != 0 && tsc_leaf.ebx != 0 && tsc_leaf.eax != 0) {
log("x86_64/tsc: Calibrating TSC using CPUID 0x15");
tsc_freq = tsc_leaf.ecx * tsc_leaf.ebx / tsc_leaf.eax;
tsc_freq = (uint64_t)tsc_leaf.ecx * tsc_leaf.ebx / tsc_leaf.eax;
} else {
log("x86_64/tsc: Unable to calibrate TSC using CPUID frequency information");
return;