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