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/*
* 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)
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