| 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
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| 2 | /* |
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| 3 | * Copyright (C) 2008 Mark Nelson, IBM Corp. |
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| 4 | */ |
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| 5 | #include <linux/export.h> |
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| 6 | #include <asm/page.h> |
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| 7 | #include <asm/processor.h> |
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| 8 | #include <asm/ppc_asm.h> |
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| 9 | #include <asm/asm-offsets.h> |
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| 10 | #include <asm/feature-fixups.h> |
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| 11 | |
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| 12 | _GLOBAL_TOC(copy_page) |
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| 13 | BEGIN_FTR_SECTION |
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| 14 | lis r5,PAGE_SIZE@h |
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| 15 | FTR_SECTION_ELSE |
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| 16 | #ifdef CONFIG_PPC_BOOK3S_64 |
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| 17 | b copypage_power7 |
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| 18 | #endif |
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| 19 | ALT_FTR_SECTION_END_IFCLR(CPU_FTR_VMX_COPY) |
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| 20 | ori r5,r5,PAGE_SIZE@l |
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| 21 | #ifdef CONFIG_PPC_KERNEL_PCREL |
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| 22 | /* |
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| 23 | * Hack for toolchain - prefixed instructions cause label difference to |
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| 24 | * be non-constant even if 8 byte alignment is known, so they can not |
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| 25 | * be put in FTR sections. |
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| 26 | */ |
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| 27 | LOAD_REG_ADDR(r10, ppc64_caches) |
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| 28 | BEGIN_FTR_SECTION |
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| 29 | #else |
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| 30 | BEGIN_FTR_SECTION |
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| 31 | LOAD_REG_ADDR(r10, ppc64_caches) |
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| 32 | #endif |
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| 33 | lwz r11,DCACHEL1LOGBLOCKSIZE(r10) /* log2 of cache block size */ |
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| 34 | lwz r12,DCACHEL1BLOCKSIZE(r10) /* get cache block size */ |
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| 35 | li r9,0 |
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| 36 | srd r8,r5,r11 |
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| 37 | |
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| 38 | mtctr r8 |
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| 39 | .Lsetup: |
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| 40 | dcbt r9,r4 |
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| 41 | dcbz r9,r3 |
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| 42 | add r9,r9,r12 |
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| 43 | bdnz .Lsetup |
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| 44 | END_FTR_SECTION_IFSET(CPU_FTR_CP_USE_DCBTZ) |
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| 45 | addi r3,r3,-8 |
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| 46 | srdi r8,r5,7 /* page is copied in 128 byte strides */ |
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| 47 | addi r8,r8,-1 /* one stride copied outside loop */ |
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| 48 | |
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| 49 | mtctr r8 |
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| 50 | |
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| 51 | ld r5,0(r4) |
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| 52 | ld r6,8(r4) |
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| 53 | ld r7,16(r4) |
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| 54 | ldu r8,24(r4) |
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| 55 | 1: std r5,8(r3) |
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| 56 | std r6,16(r3) |
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| 57 | ld r9,8(r4) |
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| 58 | ld r10,16(r4) |
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| 59 | std r7,24(r3) |
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| 60 | std r8,32(r3) |
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| 61 | ld r11,24(r4) |
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| 62 | ld r12,32(r4) |
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| 63 | std r9,40(r3) |
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| 64 | std r10,48(r3) |
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| 65 | ld r5,40(r4) |
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| 66 | ld r6,48(r4) |
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| 67 | std r11,56(r3) |
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| 68 | std r12,64(r3) |
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| 69 | ld r7,56(r4) |
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| 70 | ld r8,64(r4) |
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| 71 | std r5,72(r3) |
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| 72 | std r6,80(r3) |
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| 73 | ld r9,72(r4) |
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| 74 | ld r10,80(r4) |
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| 75 | std r7,88(r3) |
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| 76 | std r8,96(r3) |
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| 77 | ld r11,88(r4) |
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| 78 | ld r12,96(r4) |
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| 79 | std r9,104(r3) |
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| 80 | std r10,112(r3) |
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| 81 | ld r5,104(r4) |
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| 82 | ld r6,112(r4) |
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| 83 | std r11,120(r3) |
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| 84 | stdu r12,128(r3) |
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| 85 | ld r7,120(r4) |
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| 86 | ldu r8,128(r4) |
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| 87 | bdnz 1b |
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| 88 | |
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| 89 | std r5,8(r3) |
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| 90 | std r6,16(r3) |
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| 91 | ld r9,8(r4) |
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| 92 | ld r10,16(r4) |
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| 93 | std r7,24(r3) |
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| 94 | std r8,32(r3) |
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| 95 | ld r11,24(r4) |
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| 96 | ld r12,32(r4) |
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| 97 | std r9,40(r3) |
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| 98 | std r10,48(r3) |
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| 99 | ld r5,40(r4) |
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| 100 | ld r6,48(r4) |
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| 101 | std r11,56(r3) |
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| 102 | std r12,64(r3) |
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| 103 | ld r7,56(r4) |
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| 104 | ld r8,64(r4) |
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| 105 | std r5,72(r3) |
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| 106 | std r6,80(r3) |
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| 107 | ld r9,72(r4) |
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| 108 | ld r10,80(r4) |
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| 109 | std r7,88(r3) |
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| 110 | std r8,96(r3) |
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| 111 | ld r11,88(r4) |
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| 112 | ld r12,96(r4) |
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| 113 | std r9,104(r3) |
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| 114 | std r10,112(r3) |
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| 115 | std r11,120(r3) |
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| 116 | std r12,128(r3) |
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| 117 | blr |
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| 118 | EXPORT_SYMBOL(copy_page) |
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| 119 | |
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