#include <port_io.h>
#include <stdio.h>

#include <isr.h>


void (*irq_handlers[256])(isr_stack_t *r) = { 0 };

void register_interrupt_handler(uint8_t n, void (*handler)(isr_stack_t *))
{
  irq_handlers[n] = handler;
}

void isr_handler(isr_stack_t *r)
{
  if (irq_handlers[r->int_no]) {
    irq_handlers[r->int_no](r);
  } else {
    printf("Unhandled interrupt: %d\n", r->int_no);
  }


  /* Send EOI to PIC */
  if (r->int_no >= 40)
  {
    outb(0xA0, 0x20);
  }
  if (r->int_no >= 32)
  {
    outb(0x20, 0x20);
  }
}

void syscall_handler(regs_t *r)
{
  switch (r->eax) {
    case 0: printf("Syscall: Hello world\n"); break;
    case 1: printf("Syscall: value = %d\n", r->ebx); break;
    default: printf("Unknown syscall %d\n", r->eax);
  }
}