#include "idtLoader.h"

#pragma pack(push)
#pragma pack (1)

typedef struct {
    uint16_t offset_l, selector;
    uint8_t cero, access;
    uint16_t offset_m;
    uint32_t offset_h, other_cero;
} DESCR_INT;

#pragma pack(pop)

DESCR_INT *idt = (DESCR_INT *) 0;

static void setup_IDT_entry(int index, uint64_t offset);

void load_idt() {
    setup_IDT_entry(0x20, (uint64_t) &_irq00Handler);
    setup_IDT_entry(0x21, (uint64_t) &_irq01Handler);
    setup_IDT_entry(0x00, (uint64_t) &_exception0Handler);
    setup_IDT_entry(0x06, (uint64_t) &_exception6Handler);

    setup_IDT_entry(0x80, (uint64_t) &_systemCallsHandler);

    picMasterMask(0xFC);
    picSlaveMask(0xFF);
}

static void setup_IDT_entry(int index, uint64_t offset) {
    idt[index].selector = 0x08;
    idt[index].offset_l = offset & 0xFFFF;
    idt[index].offset_m = (offset >> 16) & 0xFFFF;
    idt[index].offset_h = (offset >> 32) & 0xFFFFFFFF;
    idt[index].access = ACS_INT;
    idt[index].cero = 0;
    idt[index].other_cero = (uint64_t) 0;
}