arch/x86_64/idt.c


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#include <stddef.h>
#include "arch/x86_64/tables.h"
#include "arch/x86_64/idt.h"
#include "arch/processor.h"
#include "print.h"
#include "jove.h"

PAGEALIGN
static interrupt_gate_t s_idtd[48];

uint64_t __isr_err;
uint64_t __isr_num;

extern void x86_64_lidt(struct XDTR *idtr);
void
idt_init(void)
{
    extern uintptr_t __isr_stubs[22];
    for(int i = 0; i < 22; i++)
    {
        uintptr_t base = __isr_stubs[i];
        s_idtd[i] = (interrupt_gate_t){
            .base_0_15 = (base & 0xFFFF),
            .segment_selector = 0x8,
            .ist = 0,
            .zero_0 = 0,
            .type = 0xE,
            .zero_1 = 0,
            .dpl = 0,
            .p = 1,
            .base_16_31 = (base >> 16) & 0xFFFF,
            .base_32_63 = (base >> 32) & 0xFFFFFFFF,
            .resv = 0
        };
    }
}

void
idt_setup(processor_t *proc)
{
    proc->_idtr = (struct XDTR){
        .length = sizeof(s_idtd) - 1,
        .address = (uintptr_t)s_idtd
    };
}