arch/x86_64/hal/idt.h


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#ifndef _JOVE_x86_64_HAL_IDT_H
#define _JOVE_x86_64_HAL_IDT_H 1

#include <stdint.h>
#include "jove.h"
#include "../x86_64.h"

struct idt_entry
{
    uint16_t offset_0_15;
    uint16_t segment_selector;
    union {
        struct {
            uint8_t ist : 3;
            uint8_t zero_1 : 5;
            uint8_t type : 4;
            uint8_t zero_2 : 1;
            uint8_t dpl : 2;
            uint8_t p : 1;
        };
        uint16_t flags;
    };
    uint16_t offset_16_31;
    uint32_t offset_32_63;
    uint32_t resv;
};

#define IDT_INTERRUPT_GATE 0xE

struct idt_descriptor
{
    uint16_t limit;
    uint64_t base;
} PACKED;

struct int_stackframe
{
    struct cpu_state state;
    uint64_t int_num, int_err;
    uint64_t int_rip, int_cs, int_flags, int_rsp, int_rss;
};

#define IDT_ENTRIES 48

#define IDT_EXCEPT_DE 0
#define IDT_EXCEPT_DB 1
#define IDT_EXCEPT_NMI 2
#define IDT_EXCEPT_BP 3
#define IDT_EXCEPT_OF 4
#define IDT_EXCEPT_BR 5
#define IDT_EXCEPT_UD 6
#define IDT_EXCEPT_NM 7
#define IDT_EXCEPT_DF 8
#define IDT_EXCEPT_TS 10
#define IDT_EXCEPT_NP 11
#define IDT_EXCEPT_SS 12
#define IDT_EXCEPT_GP 13
#define IDT_EXCEPT_PF 14
#define IDT_EXCEPT_MF 16
#define IDT_EXCEPT_AC 17
#define IDT_EXCEPT_MC 18
#define IDT_EXCEPT_XM 19
#define IDT_EXCEPT_VE 20
#define IDT_EXCEPT_CP 21

struct int_user_handle
{
    uintmax_t pid;
    int (*handle)(struct int_stackframe*);
};
extern struct int_user_handle __int_user_handles[IDT_ENTRIES];

#endif