26 lines
548 B
C
26 lines
548 B
C
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#include <rockos/timer.h>
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#include <rockos/hal.h>
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#include <rockos/pic.h>
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#include <stdio.h>
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uint64_t ticks = 0;
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uint8_t subticks = 0;
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__attribute__((interrupt)) void timer_handler(void* frame) {
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if(++subticks == SUBTICKS_PER_TICK) {
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++ticks;
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subticks = 0;
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}
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pic_eoi(0);
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}
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void timer_phase(uint32_t hz) {
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uint32_t divisor = PIT_SCALE / hz;
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outb(PIT_CONTROL, PIT_SET);
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outb(PIT_0, divisor & PIT_MASK);
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outb(PIT_0, (divisor >> 8) & PIT_MASK);
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}
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uint64_t get_ticks() {
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return ticks*100 + subticks;
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}
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