marv7000/zinnia
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

initgraph, whole lot of refactor

Browse Source
This commit is contained in:
Marvin
2026-10-12 15:36:48 +02:00
parent 41cc7fea77
commit eabce70866
79 changed files with 3700 additions and 302 deletions
Download Patch File Download Diff File Expand all files Collapse all files
arch/x86_64/tsc.c
+9 -6
View File
@@ -1,3 +1,4 @@
#define pr_fmt(fmt) "x86_64/tsc: " fmt
#include <zinnia/clock.h>
#include <zinnia/cmdline.h>
#include <zinnia/print.h>
@@ -42,11 +43,13 @@ static struct clock tsc_clock = {
};
void tsc_init() {
if (!use_tsc)
if (!use_tsc) {
log_warn("TSC disabled on the command line");
return;
}
if (!(asm_cpuid(1, 0).edx & CPUID_1D_TSC) || !(asm_cpuid(0x8000'0007, 0).edx & (1 << 8))) {
log("x86_64/tsc: No invariant TSC detected!\n");
log_warn("No invariant TSC detected!\n");
return;
}
@@ -69,17 +72,17 @@ void tsc_init() {
// On a normal system, this should usually never be called and is a last resort
// 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");
log("Calibrating TSC using CPUID 0x15");
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");
log_err("Unable to calibrate TSC using CPUID frequency information");
return;
}
} else {
log("x86_64/tsc: Unable to calibrate the TSC without a clock or static frequency info!\n");
log_err("Unable to calibrate the TSC without a clock or static frequency info!\n");
return;
}
log("x86_64/tsc: Timer frequency is %lu MHz\n", tsc_freq / 1'000'000);
log("Timer frequency is %lu MHz\n", tsc_freq / 1'000'000);
clock_switch(&tsc_clock);
}