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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
| commit | 76cb841cb886eef6b3bee341a2266c76578724ad (patch) | |
| tree | f5892e5ba6cc11949952a6ce4ecbe6d516d6ce58 /arch/mips/mm/cex-gen.S | |
| parent | Initial commit. (diff) | |
| download | linux-76cb841cb886eef6b3bee341a2266c76578724ad.tar.xz linux-76cb841cb886eef6b3bee341a2266c76578724ad.zip | |
Adding upstream version 4.19.249.upstream/4.19.249
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
| -rw-r--r-- | arch/mips/mm/cex-gen.S | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/arch/mips/mm/cex-gen.S b/arch/mips/mm/cex-gen.S new file mode 100644 index 000000000..45dff5cd4 --- /dev/null +++ b/arch/mips/mm/cex-gen.S @@ -0,0 +1,42 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 1995 - 1999 Ralf Baechle + * Copyright (C) 1999 Silicon Graphics, Inc. + * + * Cache error handler + */ +#include <asm/asm.h> +#include <asm/regdef.h> +#include <asm/mipsregs.h> +#include <asm/stackframe.h> + +/* + * Game over. Go to the button. Press gently. Swear where allowed by + * legislation. + */ + LEAF(except_vec2_generic) + .set noreorder + .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. + */ + mfc0 k0,CP0_CONFIG + li k1,~CONF_CM_CMASK + and k0,k0,k1 + ori k0,k0,CONF_CM_UNCACHED + mtc0 k0,CP0_CONFIG + /* Give it a few cycles to sink in... */ + nop + nop + nop + + j cache_parity_error + nop + END(except_vec2_generic) |