root/arch/alpha/kernel/traps.c

/* */

DEFINITIONS

1. do_hw_interrupt
2. trap_init

   1 /*
   2  * kernel/traps.c
   3  *
   4  * (C) Copyright 1994 Linus Torvalds
   5  */
   6 
   7 /*
   8  * This file initializes the trap entry points
   9  */
  10 
  11 #include <linux/sched.h>
  12 
  13 #include <asm/system.h>
  14 #include <asm/io.h>
  15 
  16 extern asmlinkage void entInt(void);
  17 void keyboard_interrupt(void);
  18 
  19 void do_hw_interrupt(unsigned long type, unsigned long vector)
     /*  */
  20 {
  21         if (type == 1) {
  22                 jiffies++;
  23                 return;
  24         }
  25         /* keyboard or mouse */
  26         if (type == 3) {
  27                 if (vector == 0x980) {
  28                         keyboard_interrupt();
  29                         return;
  30                 } else {
  31                 unsigned char c = inb_local(0x64);
  32                 printk("IO device interrupt, vector = %lx\n", vector);
  33                 if (!(c & 1)) {
  34                         int i;
  35                         printk("Hmm. Keyboard interrupt, status = %02x\n", c);
  36                         for (i = 0; i < 10000000 ; i++)
  37                                 /* nothing */;
  38                         printk("Serial line interrupt status: %02x\n", inb_local(0x3fa));
  39                 } else {
  40                         c = inb_local(0x60);
  41                         printk("#%02x# ", c);
  42                 }
  43                 return;
  44                 }
  45         }
  46         printk("Hardware intr %ld %ld\n", type, vector);
  47 }
  48 
  49 void trap_init(void)
     /*  */
  50 {
  51         unsigned long gptr;
  52 
  53         __asm__("br %0,___tmp\n"
  54                 "___tmp:\tldgp %0,0(%0)"
  55                 : "=r" (gptr));
  56         wrkgp(gptr);
  57         wrent(entInt, 0);
  58 }

/* */