Interrupt Descriptor Table

include/int/idt.h

struct idt_entry

Member Type	Member Name
uint16_t	base_low
uint16_t	selector
uint8_t	ist
uint8_t	flags
uint16_t	base_mid
uint32_t	base_high
uint32_t	reserved

struct idt_table

Member Type	Member Name
struct idt_entry	entries[IDT_ENTRIES]

struct idt_ptr

Member Type	Member Name
uint16_t	limit
uint64_t	base

• void idt_init()
• void idt_load()
• void idt_set_gate(uint8_t num,uint64_t base,uint16_t sel,uint8_t flags)
• void irq_set_alloc(int entry,bool used)
• int irq_alloc_entry(void)
• void irq_free_entry(int entry)
• bool irq_is_installed(int entry)

Defines

• IDT_ENTRIES: 256
• MAX_IRQ: 224

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