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