arch/m68knommu/platform/5307/vectors.c

   1 /***************************************************************************/
   2
   3 /*
   4  *      linux/arch/m68knommu/platform/5307/vectors.c
   5  *
   6  *      Copyright (C) 1999-2003, Greg Ungerer <gerg@snapgear.com>
   7  */
   8
   9 /***************************************************************************/
  10
  11 #include <linux/config.h>
  12 #include <linux/kernel.h>
  13 #include <linux/sched.h>
  14 #include <linux/param.h>
  15 #include <linux/init.h>
  16 #include <linux/unistd.h>
  17 #include <linux/delay.h>
  18 #include <asm/irq.h>
  19 #include <asm/dma.h>
  20 #include <asm/traps.h>
  21 #include <asm/machdep.h>
  22 #include <asm/coldfire.h>
  23 #include <asm/mcftimer.h>
  24 #include <asm/mcfsim.h>
  25 #include <asm/mcfdma.h>
  26 #include <asm/mcfwdebug.h>
  27
  28 /***************************************************************************/
  29
  30 #ifdef TRAP_DBG_INTERRUPT
  31
  32 asmlinkage void dbginterrupt_c(struct frame *fp)
  33 {
  34         extern void dump(struct pt_regs *fp);
  35         printk(KERN_DEBUG "%s(%d): BUS ERROR TRAP\n", __FILE__, __LINE__);
  36         dump((struct pt_regs *) fp);
  37         asm("halt");
  38 }
  39
  40 #endif
  41
  42 /***************************************************************************/
  43
  44 extern e_vector *_ramvec;
  45
  46 void set_evector(int vecnum, void (*handler)(void))
  47 {
  48         if (vecnum >= 0 && vecnum <= 255)
  49                 _ramvec[vecnum] = handler;
  50 }
  51
  52 /***************************************************************************/
  53
  54 /* Assembler routines */
  55 asmlinkage void buserr(void);
  56 asmlinkage void trap(void);
  57 asmlinkage void system_call(void);
  58 asmlinkage void inthandler(void);
  59
  60 void __init coldfire_trap_init(void)
  61 {
  62         int i;
  63
  64         /*
  65          *      There is a common trap handler and common interrupt
  66          *      handler that handle almost every vector. We treat
  67          *      the system call and bus error special, they get their
  68          *      own first level handlers.
  69          */
  70         for (i = 3; (i <= 23); i++)
  71                 _ramvec[i] = trap;
  72         for (i = 33; (i <= 63); i++)
  73                 _ramvec[i] = trap;
  74         for (i = 24; (i <= 31); i++)
  75                 _ramvec[i] = inthandler;
  76         for (i = 64; (i < 255); i++)
  77                 _ramvec[i] = inthandler;
  78         _ramvec[255] = 0;
  79
  80         _ramvec[2] = buserr;
  81         _ramvec[32] = system_call;
  82
  83 #ifdef TRAP_DBG_INTERRUPT
  84         _ramvec[12] = dbginterrupt;
  85 #endif
  86 }
  87
  88 /***************************************************************************/
  89
  90 void coldfire_reset(void)
  91 {
  92         HARD_RESET_NOW();
  93 }
  94
  95 /***************************************************************************/