arch/m68knommu/platform/coldfire/vectors.c

   1 /***************************************************************************/
   2
   3 /*
   4  *      linux/arch/m68knommu/platform/5307/vectors.c
   5  *
   6  *      Copyright (C) 1999-2007, Greg Ungerer <gerg@snapgear.com>
   7  */
   8
   9 /***************************************************************************/
  10
  11 #include <linux/kernel.h>
  12 #include <linux/init.h>
  13 #include <linux/irq.h>
  14 #include <asm/traps.h>
  15 #include <asm/machdep.h>
  16 #include <asm/coldfire.h>
  17 #include <asm/mcfsim.h>
  18 #include <asm/mcfdma.h>
  19 #include <asm/mcfwdebug.h>
  20
  21 /***************************************************************************/
  22
  23 #ifdef TRAP_DBG_INTERRUPT
  24
  25 asmlinkage void dbginterrupt_c(struct frame *fp)
  26 {
  27         extern void dump(struct pt_regs *fp);
  28         printk(KERN_DEBUG "%s(%d): BUS ERROR TRAP\n", __FILE__, __LINE__);
  29         dump((struct pt_regs *) fp);
  30         asm("halt");
  31 }
  32
  33 #endif
  34
  35 /***************************************************************************/
  36
  37 extern e_vector *_ramvec;
  38
  39 void set_evector(int vecnum, void (*handler)(void))
  40 {
  41         if (vecnum >= 0 && vecnum <= 255)
  42                 _ramvec[vecnum] = handler;
  43 }
  44
  45 /***************************************************************************/
  46
  47 /* Assembler routines */
  48 asmlinkage void buserr(void);
  49 asmlinkage void trap(void);
  50 asmlinkage void system_call(void);
  51 asmlinkage void inthandler(void);
  52
  53 void __init init_vectors(void)
  54 {
  55         int i;
  56
  57         /*
  58          *      There is a common trap handler and common interrupt
  59          *      handler that handle almost every vector. We treat
  60          *      the system call and bus error special, they get their
  61          *      own first level handlers.
  62          */
  63         for (i = 3; (i <= 23); i++)
  64                 _ramvec[i] = trap;
  65         for (i = 33; (i <= 63); i++)
  66                 _ramvec[i] = trap;
  67         for (i = 24; (i <= 31); i++)
  68                 _ramvec[i] = inthandler;
  69         for (i = 64; (i < 255); i++)
  70                 _ramvec[i] = inthandler;
  71         _ramvec[255] = 0;
  72
  73         _ramvec[2] = buserr;
  74         _ramvec[32] = system_call;
  75
  76 #ifdef TRAP_DBG_INTERRUPT
  77         _ramvec[12] = dbginterrupt;
  78 #endif
  79 }
  80
  81 /***************************************************************************/
  82
  83 void enable_vector(unsigned int irq)
  84 {
  85         /* Currently no action on ColdFire */
  86 }
  87
  88 void disable_vector(unsigned int irq)
  89 {
  90         /* Currently no action on ColdFire */
  91 }
  92
  93 void ack_vector(unsigned int irq)
  94 {
  95         /* Currently no action on ColdFire */
  96 }
  97
  98 /***************************************************************************/
  99
 100 void coldfire_reset(void)
 101 {
 102         HARD_RESET_NOW();
 103 }
 104
 105 /***************************************************************************/