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98 lines
1.9 KiB
98 lines
1.9 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* |
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* vDSO provided cache flush routines |
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* |
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* Copyright (C) 2004 Benjamin Herrenschmuidt (benh@kernel.crashing.org), |
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* IBM Corp. |
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*/ |
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#include <asm/processor.h> |
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#include <asm/ppc_asm.h> |
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#include <asm/vdso.h> |
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#include <asm/vdso_datapage.h> |
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#include <asm/asm-offsets.h> |
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#include <asm/cache.h> |
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.text |
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/* |
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* Default "generic" version of __kernel_sync_dicache. |
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* |
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* void __kernel_sync_dicache(unsigned long start, unsigned long end) |
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* |
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* Flushes the data cache & invalidate the instruction cache for the |
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* provided range [start, end[ |
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*/ |
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V_FUNCTION_BEGIN(__kernel_sync_dicache) |
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.cfi_startproc |
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BEGIN_FTR_SECTION |
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b 3f |
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END_FTR_SECTION_IFSET(CPU_FTR_COHERENT_ICACHE) |
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#ifdef CONFIG_PPC64 |
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mflr r12 |
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.cfi_register lr,r12 |
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get_datapage r10 |
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mtlr r12 |
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.cfi_restore lr |
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#endif |
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#ifdef CONFIG_PPC64 |
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lwz r7,CFG_DCACHE_BLOCKSZ(r10) |
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addi r5,r7,-1 |
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#else |
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li r5, L1_CACHE_BYTES - 1 |
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#endif |
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andc r6,r3,r5 /* round low to line bdy */ |
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subf r8,r6,r4 /* compute length */ |
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add r8,r8,r5 /* ensure we get enough */ |
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#ifdef CONFIG_PPC64 |
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lwz r9,CFG_DCACHE_LOGBLOCKSZ(r10) |
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srw. r8,r8,r9 /* compute line count */ |
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#else |
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srwi. r8, r8, L1_CACHE_SHIFT |
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mr r7, r6 |
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#endif |
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crclr cr0*4+so |
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beqlr /* nothing to do? */ |
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mtctr r8 |
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1: dcbst 0,r6 |
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#ifdef CONFIG_PPC64 |
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add r6,r6,r7 |
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#else |
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addi r6, r6, L1_CACHE_BYTES |
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#endif |
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bdnz 1b |
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sync |
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/* Now invalidate the instruction cache */ |
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#ifdef CONFIG_PPC64 |
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lwz r7,CFG_ICACHE_BLOCKSZ(r10) |
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addi r5,r7,-1 |
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andc r6,r3,r5 /* round low to line bdy */ |
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subf r8,r6,r4 /* compute length */ |
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add r8,r8,r5 |
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lwz r9,CFG_ICACHE_LOGBLOCKSZ(r10) |
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srw. r8,r8,r9 /* compute line count */ |
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crclr cr0*4+so |
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beqlr /* nothing to do? */ |
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#endif |
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mtctr r8 |
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#ifdef CONFIG_PPC64 |
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2: icbi 0,r6 |
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add r6,r6,r7 |
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#else |
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2: icbi 0, r7 |
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addi r7, r7, L1_CACHE_BYTES |
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#endif |
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bdnz 2b |
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isync |
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li r3,0 |
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blr |
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3: |
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crclr cr0*4+so |
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sync |
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isync |
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li r3,0 |
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blr |
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.cfi_endproc |
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V_FUNCTION_END(__kernel_sync_dicache)
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