| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | /* |
| Ralf Baechle | 7034228 | 2013-01-22 12:59:30 +0100 | [diff] [blame] | 17 | * Game over. Go to the button. Press gently. Swear where allowed by |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | * legislation. |
| 19 | */ |
| 20 | LEAF(except_vec2_generic) |
| 21 | .set noreorder |
| 22 | .set noat |
| Ralf Baechle | 7034228 | 2013-01-22 12:59:30 +0100 | [diff] [blame] | 23 | .set mips0 |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | /* |
| 25 | * This is a very bad place to be. Our cache error |
| 26 | * detection has triggered. If we have write-back data |
| Ralf Baechle | 7034228 | 2013-01-22 12:59:30 +0100 | [diff] [blame] | 27 | * in the cache, we may not be able to recover. As a |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | * first-order desperate measure, turn off KSEG0 cacheing. |
| 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) |