37 lines
745 B
C
37 lines
745 B
C
#include "../include/timer.h"
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#include "../include/io.h"
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#include "../include/vga.h"
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#include "../include/isr.h"
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#include "../include/task.h"
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uint32_t tick = 0;
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extern struct task_struct *current;
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static void timer_handle(registers_t *regs) {
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io_cli();
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tick++;
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schedule();
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io_sti();
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}
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void clock_sleep(uint32_t timer){
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uint32_t sleep = tick + timer;
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while(1){
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printf("");
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if(tick >= sleep)break;
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}
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}
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void init_timer(uint32_t timer) {
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register_interrupt_handler(IRQ0, &timer_handle);
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uint32_t divisor = 1193180 / timer;
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outb(0x43, 0x36); // 频率
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uint8_t l = (uint8_t) (divisor & 0xFF);
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uint8_t h = (uint8_t) ((divisor >> 8) & 0xFF);
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outb(0x40, l);
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outb(0x40, h);
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}
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