25 lines
386 B
C
25 lines
386 B
C
#include "io.h"
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#include "pit.h"
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static uint64_t counter = 0;
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void pit_handler(void)
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{
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counter++;
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}
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void init_pit(void)
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{
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// write to control register
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outb(PIT_CONTROL_REG, PIT_SET_COUNTER_0 | PIT_MODE_2 | PIT_RW_LSB_MSB);
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// write frequency
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outb(PIT_COUNTER_0, DIVIDER_LO);
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outb(PIT_COUNTER_0, DIVIDER_HI);
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}
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uint64_t gettick(void)
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{
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return counter;
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}
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