56 lines
1.1 KiB
C
56 lines
1.1 KiB
C
#ifndef IDT_H
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#define IDT_H
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#include <stdint.h>
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#include "gdt.h"
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#include "isr.h"
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#define IDT_RESERVED_ENTRIES 32
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#define IDT_NB_ENTRIES 34
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#define IDT_SIZE (IDT_NB_ENTRIES * sizeof(struct idt_entry))
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#define INTERRUPT_TYPE 0x6
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#define TRAP_TYPE 0x7
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#define PIT_INT_VECTOR 32
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#define KEYBOARD_INT_VECTOR 33
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struct idt_entry
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{
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uint16_t offset_1 : 16;
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struct segment_selector selector;
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uint8_t zero_1 : 8; // unused, set to 0
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uint8_t type : 3; // gate type
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uint8_t size : 1;
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uint8_t zero_2 : 1; // set to 0 for interrupt and trap gates
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uint8_t desc_priv : 2; // Descriptor privilege
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uint8_t present : 1;
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uint16_t offset_2 : 16;
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} __attribute__ ((packed));
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struct idt
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{
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struct idt_entry entries[IDT_NB_ENTRIES];
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};
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struct idt_r
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{
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uint16_t limit;
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uint32_t addr;
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} __attribute__ ((packed));
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struct idt_entry_descriptor
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{
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uint32_t offset;
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struct segment_selector selector;
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char type;
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};
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void init_idt(void);
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void interrupt_handler(struct isr_param *isr_param);
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#endif /* !IDT_H */
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