kernel/arch/x86/irq/interrupt.c

   1 #include <irq/idt.h>
   2 #include <irq/interrupt.h>
   3 #include <tty.h>
   4 #include <stddef.h>
   5 #include <irq/i8259a.h>
   6
   7 /* This table will hold pointers to our interrupt handlers. */
   8 static int (*int_handler_table[256])(void);
   9
  10 void int_handler(int interrupt)
  11 {
  12         if (int_handler_table[interrupt] == NULL) {
  13                 kprint("WARNING: Unhandled interrupt ", 0);
  14                 kprintb(interrupt);
  15                 kprint(" occurred!\n", 0);
  16         } else {
  17                 int ret = (*int_handler_table[interrupt])();
  18                 if (ret) {
  19                         kprint("WARNING: Error while handling interrupt ", 0);
  20                         kprintb(interrupt);
  21                         kprint("!\n", 0);
  22                 }
  23         }
  24         if (interrupt >= 0x20) {
  25                 pic_send_eoi(interrupt - 0x20);
  26         }
  27 }
  28
  29 int register_interrupt(int irq, int (*handler)(void))
  30 {
  31         int_handler_table[irq] = handler;
  32         if (irq >= 32 && irq < 48) {
  33                 pic_unmask(irq-32);
  34         }
  35         return 0;
  36 }