root/picirq.c

/*   */

DEFINITIONS

1. picinit

   1 #include "types.h"
   2 #include "x86.h"
   3 #include "traps.h"
   4 
   5 // I/O Addresses of the two programmable interrupt controllers
   6 #define IO_PIC1         0x20    // Master (IRQs 0-7)
   7 #define IO_PIC2         0xA0    // Slave (IRQs 8-15)
   8 
   9 // Don't use the 8259A interrupt controllers.  Xv6 assumes SMP hardware.
  10 void
  11 picinit(void)
     /*   */
  12 {
  13   // mask all interrupts
  14   outb(IO_PIC1+1, 0xFF);
  15   outb(IO_PIC2+1, 0xFF);
  16 }
  17 
  18 //PAGEBREAK!
  19 // Blank page.

/*   */