1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) 2012 ARM Ltd. 4 */ 5 6 #include <linux/linkage.h> 7 #include <linux/const.h> 8 #include <asm/assembler.h> 9 #include <asm/page.h> 10 #include <asm/cpufeature.h> 11 #include <asm/alternative.h> 12 13 /* 14 * Copy a page from src to dest (both are page aligned) 15 * 16 * Parameters: 17 * x0 - dest 18 * x1 - src 19 */ 20 SYM_FUNC_START(__pi_copy_page) 21 ldp x2, x3, [x1] 22 ldp x4, x5, [x1, #16] 23 ldp x6, x7, [x1, #32] 24 ldp x8, x9, [x1, #48] 25 ldp x10, x11, [x1, #64] 26 ldp x12, x13, [x1, #80] 27 ldp x14, x15, [x1, #96] 28 ldp x16, x17, [x1, #112] 29 30 add x0, x0, #256 31 add x1, x1, #128 32 1: 33 tst x0, #(PAGE_SIZE - 1) 34 35 stnp x2, x3, [x0, #-256] 36 ldp x2, x3, [x1] 37 stnp x4, x5, [x0, #16 - 256] 38 ldp x4, x5, [x1, #16] 39 stnp x6, x7, [x0, #32 - 256] 40 ldp x6, x7, [x1, #32] 41 stnp x8, x9, [x0, #48 - 256] 42 ldp x8, x9, [x1, #48] 43 stnp x10, x11, [x0, #64 - 256] 44 ldp x10, x11, [x1, #64] 45 stnp x12, x13, [x0, #80 - 256] 46 ldp x12, x13, [x1, #80] 47 stnp x14, x15, [x0, #96 - 256] 48 ldp x14, x15, [x1, #96] 49 stnp x16, x17, [x0, #112 - 256] 50 ldp x16, x17, [x1, #112] 51 52 add x0, x0, #128 53 add x1, x1, #128 54 55 b.ne 1b 56 57 stnp x2, x3, [x0, #-256] 58 stnp x4, x5, [x0, #16 - 256] 59 stnp x6, x7, [x0, #32 - 256] 60 stnp x8, x9, [x0, #48 - 256] 61 stnp x10, x11, [x0, #64 - 256] 62 stnp x12, x13, [x0, #80 - 256] 63 stnp x14, x15, [x0, #96 - 256] 64 stnp x16, x17, [x0, #112 - 256] 65 66 ret 67 SYM_FUNC_END(__pi_copy_page) 68 SYM_FUNC_ALIAS(copy_page, __pi_copy_page) 69 EXPORT_SYMBOL(copy_page)
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