1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License.  See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 1995 - 1999 Ralf Baechle
7 * Copyright (C) 1999 Silicon Graphics, Inc.
8 *
9 * Cache error handler
10 */
11#include <asm/asm.h>
12#include <asm/regdef.h>
13#include <asm/mipsregs.h>
14#include <asm/stackframe.h>
15
16/*
17 * Game over.  Go to the button.  Press gently.	 Swear where allowed by
18 * legislation.
19 */
20	LEAF(except_vec2_generic)
21	.set	noreorder
22	.set	noat
23	.set	mips0
24	/*
25	 * This is a very bad place to be.  Our cache error
26	 * detection has triggered.  If we have write-back data
27	 * in the cache, we may not be able to recover.	 As a
28	 * first-order desperate measure, turn off KSEG0 caching.
29	 */
30	mfc0	k0,CP0_CONFIG
31	li	k1,~CONF_CM_CMASK
32	and	k0,k0,k1
33	ori	k0,k0,CONF_CM_UNCACHED
34	mtc0	k0,CP0_CONFIG
35	/* Give it a few cycles to sink in... */
36	nop
37	nop
38	nop
39
40	j	cache_parity_error
41	nop
42	END(except_vec2_generic)
43