alexvoste
48 lines
1.0 KiB
C
48 lines
1.0 KiB
C
#ifndef IDT_H
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#define IDT_H
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#include <stdint.h>
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#include <stdbool.h>
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#define IDT_MAX_DESCRIPTORS 256
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#define IS_FLAG_SETTED(x, flag) ((x) | (flag))
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#define FLAG_SET(x, flag) ((x) |= (flag))
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#define FLAG_UNSET(x, flag) ((x) &= ~(flag))
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typedef enum {
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IDT_FLAG_GATE_TASK = 0x5,
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IDT_FLAG_GATE_16BIT_INT = 0x6,
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IDT_FLAG_GATE_16BIT_TRAP = 0x7,
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IDT_FLAG_GATE_32BIT_INT = 0xE,
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IDT_FLAG_GATE_32BIT_TRAP = 0xF,
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IDT_FLAG_RING0 = (0 << 5),
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IDT_FLAG_RING1 = (1 << 5),
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IDT_FLAG_RING2 = (2 << 5),
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IDT_FLAG_RING3 = (3 << 5),
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IDT_FLAG_PRESENT = 0x80,
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} IDT_FLAGS;
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typedef struct {
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uint16_t base_low;
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uint16_t kernel_cs;
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uint8_t ist;
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uint8_t attributes;
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uint16_t base_mid;
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uint32_t base_high;
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uint32_t reserved;
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}__attribute__((packed)) idt_entry_t;
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typedef struct {
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uint16_t limit;
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idt_entry_t *base;
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}__attribute__((packed)) idtr_t;
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extern idtr_t idtr;
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void setup_interrupt_descriptor_table(uint64_t kernel_code_segment);
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void idt_load(void);
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#endif
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