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timer: Refactor tick_delta to use hardware-specific clock frequency

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This commit is contained in:
Liam Kerr 2026-05-02 03:19:15 +01:00
parent 5f09049765
commit 40333f1a37
2 changed files with 8 additions and 1 deletions
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2
src/kernel/timer.c
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@ -6,7 +6,7 @@
#include "drivers/uart.h" #include "drivers/uart.h"
_Atomic uint64_t sys_ticks = 0; _Atomic uint64_t sys_ticks = 0;
const uint64_t tick_delta = 1000; const uint64_t tick_delta = TICKS_PER_MS;
void timer_init() { void timer_init() {
timer_tick(); timer_tick();

7
src/kernel/timer.h
View file

@ -2,6 +2,13 @@
#define TIMER_H #define TIMER_H
#include <stdint.h> #include <stdint.h>
/* Define your clock frequency here based on your hardware */
/* Example: 12.5 MHz for QEMU virt machine */
#define CLOCK_FREQ_HZ 12500000
/* Calculate ticks per millisecond */
#define TICKS_PER_MS (CLOCK_FREQ_HZ / 1000)
extern _Atomic uint64_t sys_ticks; extern _Atomic uint64_t sys_ticks;
extern const uint64_t tick_delta; extern const uint64_t tick_delta;