bond/x64/src/c/hal/io.c

#include "io.h"
#include "print.h"
#include "hal.h"

void hal_interrupt_handler_dummy(void)
{
    hal_printf("Yep... That just happened, an interrupt...\n");
    return;
}


void NATIVE64 hal_write_gate(void *const gate, uint64_t const offset, uint32_t const selector, uint32_t const attr)
{
    ((uint8_t*)gate)[0] = (uint8_t)(offset & 0xFF);
    ((uint8_t*)gate)[1] = (uint8_t)((offset >> 8) & 0xFF);
    ((uint8_t*)gate)[2] = (uint8_t)(selector & 0xFF);
    ((uint8_t*)gate)[3] = (uint8_t)((selector >> 8) & 0xFF);
    ((uint8_t*)gate)[4] = (uint8_t)(attr & 0xFF);
    ((uint8_t*)gate)[5] = (uint8_t)((attr >> 8) & 0xFF);
    ((uint8_t*)gate)[6] = (uint8_t)((offset >> 16) & 0xFF);
    ((uint8_t*)gate)[7] = (uint8_t)((offset >> 24) & 0xFF);
    ((uint8_t*)gate)[8] = (uint8_t)((offset >> 32) & 0xFF);
    ((uint8_t*)gate)[9] = (uint8_t)((offset >> 40) & 0xFF);
    ((uint8_t*)gate)[10] = (uint8_t)((offset >> 48) & 0xFF);
    ((uint8_t*)gate)[11] = (uint8_t)((offset >> 56) & 0xFF);
    ((uint8_t*)gate)[12] = 0;
    ((uint8_t*)gate)[13] = 0;
    ((uint8_t*)gate)[14] = 0;
    ((uint8_t*)gate)[15] = 0;
    return;
}

void NATIVE64 hal_set_interrupt_handler(uint64_t index, void (*handler)(void))
{
    hal_write_gate(g_idt + 16*index, (uint64_t)handler, SEG_SELECTOR(1,0), GATE_DPL_0 | GATE_PRESENT | GATE_TYPE_INTERRUPT);
    return;
}