vectors.c

linux-2.6.15.6

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

/*
 *	linux/arch/m68knommu/platform/5307/vectors.c
 *
 *	Copyright (C) 1999-2003, Greg Ungerer <[e-mail]>
 */

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

#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/param.h>
#include <linux/init.h>
#include <linux/unistd.h>
#include <linux/delay.h>
#include <asm/irq.h>
#include <asm/dma.h>
#include <asm/traps.h>
#include <asm/machdep.h>
#include <asm/coldfire.h>
#include <asm/mcftimer.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 coldfire_trap_init(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 coldfire_reset(void)
{
	HARD_RESET_NOW();
}

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