/* * Copyright (C) 2001 Broadcom Corporation * * 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 <linux/config.h>#include <asm/asm.h>#include <asm/regdef.h>#include <asm/mipsregs.h>#include <asm/sibyte/board.h>	.text	/* Special Cache Error handler for SB1 for now */	LEAF(except_vec2_sb1)	.set	noat	.set	mips0	/*	 * This is a very bad place to be.  Our cache error detection has	 * triggered.  If we have write-back data in the cache, we may not be	 * able to recover.  As a first-order desperate measure, turn off KSEG0	 * cacheing.	 */	.set	push	#.set	mips64	.set	mips4	.set	reorder#ifdef CONFIG_SB1_CERR_IGNORE_RECOVERABLE	mfc0	k1, $26				# mfc0	k1, $26, 0	# check if error was recoverable	# XXXKW - count them	bltz	k1, leave_cerr#endif#ifdef CONFIG_SB1_PASS_1_WORKAROUNDS	# look for signature of spurious CErr	lui	k0, 0x4000	bne	k0, k1, real_cerr	.word	0x401Bd801			# mfc0	k1, $27, 1	lui	k0, 0xffe0	and	k1, k0, k1	lui	k0, 0x0200	beq	k0, k1, leave_cerr	# XXXKW - count them#endifreal_cerr:#ifdef CONFIG_SB1_CERR_SPIN        setleds(k0,k1,'C','E','R','R')1:	b	1b#else	mfc0	k0,CP0_CONFIG	li	k1,~CONF_CM_CMASK	and	k0,k0,k1	ori	k0,k0,CONF_CM_UNCACHED	mtc0	k0,CP0_CONFIG	SSNOP	SSNOP	SSNOP	SSNOP	bnezl	$0, 1f1:	j	sb1_cache_error#endif#if defined(CONFIG_SB1_PASS_1_WORKAROUNDS) || defined(CONFIG_SB1_CERR_IGNORE_RECOVERABLE)leave_cerr:	# clear/unlock the registers	mtc0	zero, $26			# mtc0	zero, $26, 0	mtc0	zero, $27			# mtc0	zero, $27, 0	.word	0x4080d801			# mtc0	zero, $27, 1	.word	0x4080d803			# mtc0	zero, $27, 3	eret#endif	.set	pop	END(except_vec2_sb1)