1/* 2 * Copyright (C) 2008 Mark Nelson, IBM Corp. 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License 6 * as published by the Free Software Foundation; either version 7 * 2 of the License, or (at your option) any later version. 8 */ 9#include <asm/page.h> 10#include <asm/processor.h> 11#include <asm/ppc_asm.h> 12#include <asm/asm-offsets.h> 13#include <asm/export.h> 14 15 .section ".toc","aw" 16PPC64_CACHES: 17 .tc ppc64_caches[TC],ppc64_caches 18 .section ".text" 19 20_GLOBAL_TOC(copy_page) 21BEGIN_FTR_SECTION 22 lis r5,PAGE_SIZE@h 23FTR_SECTION_ELSE 24 b copypage_power7 25ALT_FTR_SECTION_END_IFCLR(CPU_FTR_VMX_COPY) 26 ori r5,r5,PAGE_SIZE@l 27BEGIN_FTR_SECTION 28 ld r10,PPC64_CACHES@toc(r2) 29 lwz r11,DCACHEL1LOGBLOCKSIZE(r10) /* log2 of cache block size */ 30 lwz r12,DCACHEL1BLOCKSIZE(r10) /* get cache block size */ 31 li r9,0 32 srd r8,r5,r11 33 34 mtctr r8 35.Lsetup: 36 dcbt r9,r4 37 dcbz r9,r3 38 add r9,r9,r12 39 bdnz .Lsetup 40END_FTR_SECTION_IFSET(CPU_FTR_CP_USE_DCBTZ) 41 addi r3,r3,-8 42 srdi r8,r5,7 /* page is copied in 128 byte strides */ 43 addi r8,r8,-1 /* one stride copied outside loop */ 44 45 mtctr r8 46 47 ld r5,0(r4) 48 ld r6,8(r4) 49 ld r7,16(r4) 50 ldu r8,24(r4) 511: std r5,8(r3) 52 std r6,16(r3) 53 ld r9,8(r4) 54 ld r10,16(r4) 55 std r7,24(r3) 56 std r8,32(r3) 57 ld r11,24(r4) 58 ld r12,32(r4) 59 std r9,40(r3) 60 std r10,48(r3) 61 ld r5,40(r4) 62 ld r6,48(r4) 63 std r11,56(r3) 64 std r12,64(r3) 65 ld r7,56(r4) 66 ld r8,64(r4) 67 std r5,72(r3) 68 std r6,80(r3) 69 ld r9,72(r4) 70 ld r10,80(r4) 71 std r7,88(r3) 72 std r8,96(r3) 73 ld r11,88(r4) 74 ld r12,96(r4) 75 std r9,104(r3) 76 std r10,112(r3) 77 ld r5,104(r4) 78 ld r6,112(r4) 79 std r11,120(r3) 80 stdu r12,128(r3) 81 ld r7,120(r4) 82 ldu r8,128(r4) 83 bdnz 1b 84 85 std r5,8(r3) 86 std r6,16(r3) 87 ld r9,8(r4) 88 ld r10,16(r4) 89 std r7,24(r3) 90 std r8,32(r3) 91 ld r11,24(r4) 92 ld r12,32(r4) 93 std r9,40(r3) 94 std r10,48(r3) 95 ld r5,40(r4) 96 ld r6,48(r4) 97 std r11,56(r3) 98 std r12,64(r3) 99 ld r7,56(r4) 100 ld r8,64(r4) 101 std r5,72(r3) 102 std r6,80(r3) 103 ld r9,72(r4) 104 ld r10,80(r4) 105 std r7,88(r3) 106 std r8,96(r3) 107 ld r11,88(r4) 108 ld r12,96(r4) 109 std r9,104(r3) 110 std r10,112(r3) 111 std r11,120(r3) 112 std r12,128(r3) 113 blr 114EXPORT_SYMBOL(copy_page) 115