mirror of https://github.com/tailix/kernel.git
29 lines
641 B
C
29 lines
641 B
C
#include "timer.h"
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#include <kernaux/arch/i386.h>
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#include <kernaux/console.h>
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void timer_initialize(unsigned int frequency)
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{
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kernaux_console_print("[INFO] timer: Initialize timer.\n");
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const unsigned int divisor = 1193180 / frequency;
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const unsigned char l = divisor & 0xFF;
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const unsigned char h = (divisor >> 8) & 0xFF;
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kernaux_arch_i386_outportb(0x43, 0x36);
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kernaux_arch_i386_outportb(0x40, l);
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kernaux_arch_i386_outportb(0x40, h);
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}
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void timer_register_handler(timer_handler_t handler)
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{
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hwint_register_handler(0, handler);
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}
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void timer_unregister_handler()
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{
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hwint_unregister_handler(0);
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}
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