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vectors.c

/***************************************************************************/

/*
 *    linux/arch/m68knommu/platform/5307/vectors.c
 *
 *    Copyright (C) 1999-2007, Greg Ungerer <gerg@snapgear.com>
 */

/***************************************************************************/

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <asm/traps.h>
#include <asm/machdep.h>
#include <asm/coldfire.h>
#include <asm/mcfsim.h>
#include <asm/mcfdma.h>
#include <asm/mcfwdebug.h>

/***************************************************************************/

#ifdef TRAP_DBG_INTERRUPT

asmlinkage void dbginterrupt_c(struct frame *fp)
{
      extern void dump(struct pt_regs *fp);
      printk(KERN_DEBUG "%s(%d): BUS ERROR TRAP\n", __FILE__, __LINE__);
      dump((struct pt_regs *) fp);
      asm("halt");
}

#endif

/***************************************************************************/

extern e_vector   *_ramvec;

void set_evector(int vecnum, void (*handler)(void))
{
      if (vecnum >= 0 && vecnum <= 255)
            _ramvec[vecnum] = handler;
}

/***************************************************************************/

/* Assembler routines */
asmlinkage void buserr(void);
asmlinkage void trap(void);
asmlinkage void system_call(void);
asmlinkage void inthandler(void);

void __init init_vectors(void)
{
      int i;

      /*
       *    There is a common trap handler and common interrupt
       *    handler that handle almost every vector. We treat
       *    the system call and bus error special, they get their
       *    own first level handlers.
       */
      for (i = 3; (i <= 23); i++)
            _ramvec[i] = trap;
      for (i = 33; (i <= 63); i++)
            _ramvec[i] = trap;
      for (i = 24; (i <= 31); i++)
            _ramvec[i] = inthandler;
      for (i = 64; (i < 255); i++)
            _ramvec[i] = inthandler;
      _ramvec[255] = 0;

      _ramvec[2] = buserr;
      _ramvec[32] = system_call;

#ifdef TRAP_DBG_INTERRUPT
      _ramvec[12] = dbginterrupt;
#endif
}

/***************************************************************************/

void enable_vector(unsigned int irq)
{
      /* Currently no action on ColdFire */
}

void disable_vector(unsigned int irq)
{
      /* Currently no action on ColdFire */
}

void ack_vector(unsigned int irq)
{
      /* Currently no action on ColdFire */
}

/***************************************************************************/

void coldfire_reset(void)
{
      HARD_RESET_NOW();
}

/***************************************************************************/

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