33 lines
850 B
C
33 lines
850 B
C
#include <kernel/kernel.h>
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#include <kernel/pit.h>
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#include <kernel/io.h>
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#include <kernel/pic.h>
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extern kernel_ctx_t ctx;
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void pit_init(void) {
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outb(PIT_MODE_CMD, PIT_CHAN0 | PIT_LOHIGH | PIT_MODE2);
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outb(PIT_CHAN0_DATA, (uint8_t)(DIVISOR & 0xff));
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outb(PIT_CHAN0_DATA, (uint8_t)((DIVISOR & 0xff00) >> 8));
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}
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extern void task_switch(task_t *task);
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void pit_handler(void) {
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ctx.ticks++;
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if (ctx.current_task->next) {
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LOG("TASK SWITCH\n");
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//task_t *old = ctx.current_task;
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//task_t *new = (task_t *)ctx.current_task->next;
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//new->next = (uint32_t *)old;
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//old->next = (uint32_t *)new;
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task_switch((task_t *)ctx.current_task->next);
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}
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outb(PIT_CHAN0_DATA, (uint8_t)(DIVISOR & 0xff));
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outb(PIT_CHAN0_DATA, (uint8_t)((DIVISOR & 0xff00) >> 8));
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pic_send_eoi(0);
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}
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