27 lines
735 B
C
27 lines
735 B
C
#include <stdbool.h>
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#include <stddef.h>
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#include "cpu/idt.h"
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struct interrupt_descriptor_32 idt[256];
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static size_t idt_ptr[2];
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void idt_init(void) {
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size_t idt_address = (size_t)idt;
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idt_ptr[0] = (sizeof (struct interrupt_descriptor_32) * 256) + ((idt_address & 0xffff) << 16);
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idt_ptr[1] = idt_address >> 16;
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__asm__ __volatile__(
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"lidt %0\n\t"
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"sti\n\t" : : "m"(idt_ptr)
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);
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}
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void idt_register_handler(uint8_t interrupt, size_t address) {
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idt[interrupt].offset_1 = address & 0xffff;
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idt[interrupt].selector = KERNEL_CODE_SEGMENT_OFFSET;
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idt[interrupt].zero = 0;
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idt[interrupt].type_attributes = INTERRUPT_GATE;
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idt[interrupt].offset_2 = (address & 0xffff0000) >> 16;
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}
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