![Benjamin Herrenschmidt](/assets/img/avatar_default.png)
In a number of places we called "cache line size" what is actually the cache block size, which in the powerpc architecture, means the effective size to use with cache management instructions (it can be different from the actual cache line size). We fix the naming across the board and properly retrieve both pieces of information when available in the device-tree. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
115 lines
2.1 KiB
ArmAsm
115 lines
2.1 KiB
ArmAsm
/*
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* Copyright (C) 2008 Mark Nelson, IBM Corp.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <asm/page.h>
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#include <asm/processor.h>
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#include <asm/ppc_asm.h>
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#include <asm/asm-offsets.h>
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#include <asm/export.h>
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.section ".toc","aw"
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PPC64_CACHES:
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.tc ppc64_caches[TC],ppc64_caches
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.section ".text"
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_GLOBAL_TOC(copy_page)
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BEGIN_FTR_SECTION
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lis r5,PAGE_SIZE@h
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FTR_SECTION_ELSE
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b copypage_power7
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ALT_FTR_SECTION_END_IFCLR(CPU_FTR_VMX_COPY)
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ori r5,r5,PAGE_SIZE@l
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BEGIN_FTR_SECTION
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ld r10,PPC64_CACHES@toc(r2)
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lwz r11,DCACHEL1LOGBLOCKSIZE(r10) /* log2 of cache block size */
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lwz r12,DCACHEL1BLOCKSIZE(r10) /* get cache block size */
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li r9,0
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srd r8,r5,r11
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mtctr r8
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.Lsetup:
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dcbt r9,r4
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dcbz r9,r3
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add r9,r9,r12
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bdnz .Lsetup
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END_FTR_SECTION_IFSET(CPU_FTR_CP_USE_DCBTZ)
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addi r3,r3,-8
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srdi r8,r5,7 /* page is copied in 128 byte strides */
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addi r8,r8,-1 /* one stride copied outside loop */
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mtctr r8
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ld r5,0(r4)
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ld r6,8(r4)
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ld r7,16(r4)
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ldu r8,24(r4)
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1: std r5,8(r3)
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std r6,16(r3)
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ld r9,8(r4)
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ld r10,16(r4)
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std r7,24(r3)
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std r8,32(r3)
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ld r11,24(r4)
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ld r12,32(r4)
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std r9,40(r3)
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std r10,48(r3)
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ld r5,40(r4)
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ld r6,48(r4)
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std r11,56(r3)
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std r12,64(r3)
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ld r7,56(r4)
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ld r8,64(r4)
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std r5,72(r3)
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std r6,80(r3)
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ld r9,72(r4)
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ld r10,80(r4)
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std r7,88(r3)
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std r8,96(r3)
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ld r11,88(r4)
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ld r12,96(r4)
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std r9,104(r3)
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std r10,112(r3)
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ld r5,104(r4)
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ld r6,112(r4)
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std r11,120(r3)
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stdu r12,128(r3)
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ld r7,120(r4)
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ldu r8,128(r4)
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bdnz 1b
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std r5,8(r3)
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std r6,16(r3)
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ld r9,8(r4)
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ld r10,16(r4)
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std r7,24(r3)
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std r8,32(r3)
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ld r11,24(r4)
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ld r12,32(r4)
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std r9,40(r3)
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std r10,48(r3)
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ld r5,40(r4)
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ld r6,48(r4)
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std r11,56(r3)
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std r12,64(r3)
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ld r7,56(r4)
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ld r8,64(r4)
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std r5,72(r3)
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std r6,80(r3)
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ld r9,72(r4)
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ld r10,80(r4)
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std r7,88(r3)
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std r8,96(r3)
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ld r11,88(r4)
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ld r12,96(r4)
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std r9,104(r3)
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std r10,112(r3)
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std r11,120(r3)
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std r12,128(r3)
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blr
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EXPORT_SYMBOL(copy_page)
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