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| author | Srikant Patnaik | 2015-01-13 15:08:24 +0530 |
|---|---|---|
| committer | Srikant Patnaik | 2015-01-13 15:08:24 +0530 |
| commit | 97327692361306d1e6259021bc425e32832fdb50 (patch) | |
| tree | fe9088f3248ec61e24f404f21b9793cb644b7f01 /arch/powerpc/kernel/vdso64/cacheflush.S | |
| parent | 2d05a8f663478a44e088d122e0d62109bbc801d0 (diff) | |
| parent | a3a8b90b61e21be3dde9101c4e86c881e0f06210 (diff) | |
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dirty fix to merging
Diffstat (limited to 'arch/powerpc/kernel/vdso64/cacheflush.S')
| -rw-r--r-- | arch/powerpc/kernel/vdso64/cacheflush.S | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/vdso64/cacheflush.S b/arch/powerpc/kernel/vdso64/cacheflush.S new file mode 100644 index 00000000..69c5af2b --- /dev/null +++ b/arch/powerpc/kernel/vdso64/cacheflush.S @@ -0,0 +1,84 @@ +/* + * vDSO provided cache flush routines + * + * Copyright (C) 2004 Benjamin Herrenschmuidt (benh@kernel.crashing.org), + * IBM Corp. + * + * 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. + */ +#include <asm/processor.h> +#include <asm/ppc_asm.h> +#include <asm/vdso.h> +#include <asm/asm-offsets.h> + + .text + +/* + * Default "generic" version of __kernel_sync_dicache. + * + * void __kernel_sync_dicache(unsigned long start, unsigned long end) + * + * Flushes the data cache & invalidate the instruction cache for the + * provided range [start, end[ + */ +V_FUNCTION_BEGIN(__kernel_sync_dicache) + .cfi_startproc + mflr r12 + .cfi_register lr,r12 + mr r11,r3 + bl V_LOCAL_FUNC(__get_datapage) + mtlr r12 + mr r10,r3 + + lwz r7,CFG_DCACHE_BLOCKSZ(r10) + addi r5,r7,-1 + andc r6,r11,r5 /* round low to line bdy */ + subf r8,r6,r4 /* compute length */ + add r8,r8,r5 /* ensure we get enough */ + lwz r9,CFG_DCACHE_LOGBLOCKSZ(r10) + srw. r8,r8,r9 /* compute line count */ + crclr cr0*4+so + beqlr /* nothing to do? */ + mtctr r8 +1: dcbst 0,r6 + add r6,r6,r7 + bdnz 1b + sync + +/* Now invalidate the instruction cache */ + + lwz r7,CFG_ICACHE_BLOCKSZ(r10) + addi r5,r7,-1 + andc r6,r11,r5 /* round low to line bdy */ + subf r8,r6,r4 /* compute length */ + add r8,r8,r5 + lwz r9,CFG_ICACHE_LOGBLOCKSZ(r10) + srw. r8,r8,r9 /* compute line count */ + crclr cr0*4+so + beqlr /* nothing to do? */ + mtctr r8 +2: icbi 0,r6 + add r6,r6,r7 + bdnz 2b + isync + li r3,0 + blr + .cfi_endproc +V_FUNCTION_END(__kernel_sync_dicache) + + +/* + * POWER5 version of __kernel_sync_dicache + */ +V_FUNCTION_BEGIN(__kernel_sync_dicache_p5) + .cfi_startproc + crclr cr0*4+so + sync + isync + li r3,0 + blr + .cfi_endproc +V_FUNCTION_END(__kernel_sync_dicache_p5) |