[J-u-boot.git] / cpu / microblaze / exception.c

/*
 * (C) Copyright 2007 Michal Simek
 *
 * Michal  SIMEK <[email protected]>
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <common.h>
#include <asm/asm.h>

void _hw_exception_handler (void)
{
	int address = 0;
	int state = 0;
	/* loading address of exception EAR */
	MFS (address, rear);
	/* loading excetpion state register ESR */
	MFS (state, resr);
	printf ("Hardware exception at 0x%x address\n", address);
	switch (state & 0x1f) {	/* mask on exception cause */
	case 0x1:
		puts ("Unaligned data access exception\n");
		break;
	case 0x2:
		puts ("Illegal op-code exception\n");
		break;
	case 0x3:
		puts ("Instruction bus error exception\n");
		break;
	case 0x4:
		puts ("Data bus error exception\n");
		break;
	case 0x5:
		puts ("Divide by zero exception\n");
		break;
#ifdef MICROBLAZE_V5
	case 0x1000:
		puts ("Exception in delay slot\n");
		break;
#endif
	default:
		puts ("Undefined cause\n");
		break;
	}
	printf ("Unaligned %sword access\n", ((state & 0x800) ? "" : "half"));
	printf ("Unaligned %s access\n", ((state & 0x400) ? "store" : "load"));
	printf ("Register R%x\n", (state & 0x3E) >> 5);
	hang ();
}

#ifdef CONFIG_SYS_USR_EXCEP
void _exception_handler (void)
{
	puts ("User vector_exception\n");
	hang ();
}
#endif
Commit	Line	Data
76316a31 MS	1	/*
	2	* (C) Copyright 2007 Michal Simek
	3	*
	4	* Michal SIMEK <[email protected]>
	5	*
	6	* See file CREDITS for list of people who contributed to this
	7	* project.
	8	*
	9	* This program is free software; you can redistribute it and/or
	10	* modify it under the terms of the GNU General Public License as
	11	* published by the Free Software Foundation; either version 2 of
	12	* the License, or (at your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	* GNU General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program; if not, write to the Free Software
	21	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	22	* MA 02111-1307 USA
	23	*/
	24
	25	#include <common.h>
1a50f164	26	#include <asm/asm.h>
76316a31 MS	27
	28	void _hw_exception_handler (void)
	29	{
	30	int address = 0;
	31	int state = 0;
	32	/* loading address of exception EAR */
e69f66c6	33	MFS (address, rear);
76316a31	34	/* loading excetpion state register ESR */
e69f66c6	35	MFS (state, resr);
76316a31 MS	36	printf ("Hardware exception at 0x%x address\n", address);
	37	switch (state & 0x1f) { /* mask on exception cause */
	38	case 0x1:
	39	puts ("Unaligned data access exception\n");
	40	break;
	41	case 0x2:
	42	puts ("Illegal op-code exception\n");
	43	break;
	44	case 0x3:
	45	puts ("Instruction bus error exception\n");
	46	break;
	47	case 0x4:
	48	puts ("Data bus error exception\n");
	49	break;
	50	case 0x5:
	51	puts ("Divide by zero exception\n");
	52	break;
1a50f164 MS	53	#ifdef MICROBLAZE_V5
	54	case 0x1000:
	55	puts ("Exception in delay slot\n");
	56	break;
	57	#endif
76316a31 MS	58	default:
	59	puts ("Undefined cause\n");
	60	break;
	61	}
	62	printf ("Unaligned %sword access\n", ((state & 0x800) ? "" : "half"));
	63	printf ("Unaligned %s access\n", ((state & 0x400) ? "store" : "load"));
	64	printf ("Register R%x\n", (state & 0x3E) >> 5);
	65	hang ();
	66	}
	67
6d0f6bcf	68	#ifdef CONFIG_SYS_USR_EXCEP
76316a31 MS	69	void _exception_handler (void)
	70	{
	71	puts ("User vector_exception\n");
	72	hang ();
	73	}
	74	#endif