1/* SPDX-License-Identifier: GPL-2.0-only */ 2/* 3 * sha2-ce-core.S - core SHA-224/SHA-256 transform using v8 Crypto Extensions 4 * 5 * Copyright (C) 2014 Linaro Ltd <ard.biesheuvel@linaro.org> 6 */ 7 8#include <linux/linkage.h> 9#include <asm/assembler.h> 10 11 .text 12 .arch armv8-a+crypto 13 14 dga .req q20 15 dgav .req v20 16 dgb .req q21 17 dgbv .req v21 18 19 t0 .req v22 20 t1 .req v23 21 22 dg0q .req q24 23 dg0v .req v24 24 dg1q .req q25 25 dg1v .req v25 26 dg2q .req q26 27 dg2v .req v26 28 29 .macro add_only, ev, rc, s0 30 mov dg2v.16b, dg0v.16b 31 .ifeq \ev 32 add t1.4s, v\s0\().4s, \rc\().4s 33 sha256h dg0q, dg1q, t0.4s 34 sha256h2 dg1q, dg2q, t0.4s 35 .else 36 .ifnb \s0 37 add t0.4s, v\s0\().4s, \rc\().4s 38 .endif 39 sha256h dg0q, dg1q, t1.4s 40 sha256h2 dg1q, dg2q, t1.4s 41 .endif 42 .endm 43 44 .macro add_update, ev, rc, s0, s1, s2, s3 45 sha256su0 v\s0\().4s, v\s1\().4s 46 add_only \ev, \rc, \s1 47 sha256su1 v\s0\().4s, v\s2\().4s, v\s3\().4s 48 .endm 49 50 /* 51 * The SHA-256 round constants 52 */ 53 .section ".rodata", "a" 54 .align 4 55.Lsha2_rcon: 56 .word 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5 57 .word 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5 58 .word 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3 59 .word 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174 60 .word 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc 61 .word 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da 62 .word 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7 63 .word 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967 64 .word 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13 65 .word 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85 66 .word 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3 67 .word 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070 68 .word 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5 69 .word 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3 70 .word 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208 71 .word 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2 72 73 /* 74 * void sha2_ce_transform(struct sha256_ce_state *sst, u8 const *src, 75 * int blocks) 76 */ 77 .text 78SYM_FUNC_START(sha2_ce_transform) 79 /* load round constants */ 80 adr_l x8, .Lsha2_rcon 81 ld1 { v0.4s- v3.4s}, [x8], #64 82 ld1 { v4.4s- v7.4s}, [x8], #64 83 ld1 { v8.4s-v11.4s}, [x8], #64 84 ld1 {v12.4s-v15.4s}, [x8] 85 86 /* load state */ 87 ld1 {dgav.4s, dgbv.4s}, [x0] 88 89 /* load sha256_ce_state::finalize */ 90 ldr_l w4, sha256_ce_offsetof_finalize, x4 91 ldr w4, [x0, x4] 92 93 /* load input */ 940: ld1 {v16.4s-v19.4s}, [x1], #64 95 sub w2, w2, #1 96 97CPU_LE( rev32 v16.16b, v16.16b ) 98CPU_LE( rev32 v17.16b, v17.16b ) 99CPU_LE( rev32 v18.16b, v18.16b ) 100CPU_LE( rev32 v19.16b, v19.16b ) 101 1021: add t0.4s, v16.4s, v0.4s 103 mov dg0v.16b, dgav.16b 104 mov dg1v.16b, dgbv.16b 105 106 add_update 0, v1, 16, 17, 18, 19 107 add_update 1, v2, 17, 18, 19, 16 108 add_update 0, v3, 18, 19, 16, 17 109 add_update 1, v4, 19, 16, 17, 18 110 111 add_update 0, v5, 16, 17, 18, 19 112 add_update 1, v6, 17, 18, 19, 16 113 add_update 0, v7, 18, 19, 16, 17 114 add_update 1, v8, 19, 16, 17, 18 115 116 add_update 0, v9, 16, 17, 18, 19 117 add_update 1, v10, 17, 18, 19, 16 118 add_update 0, v11, 18, 19, 16, 17 119 add_update 1, v12, 19, 16, 17, 18 120 121 add_only 0, v13, 17 122 add_only 1, v14, 18 123 add_only 0, v15, 19 124 add_only 1 125 126 /* update state */ 127 add dgav.4s, dgav.4s, dg0v.4s 128 add dgbv.4s, dgbv.4s, dg1v.4s 129 130 /* handled all input blocks? */ 131 cbz w2, 2f 132 cond_yield 3f, x5, x6 133 b 0b 134 135 /* 136 * Final block: add padding and total bit count. 137 * Skip if the input size was not a round multiple of the block size, 138 * the padding is handled by the C code in that case. 139 */ 1402: cbz x4, 3f 141 ldr_l w4, sha256_ce_offsetof_count, x4 142 ldr x4, [x0, x4] 143 movi v17.2d, #0 144 mov x8, #0x80000000 145 movi v18.2d, #0 146 ror x7, x4, #29 // ror(lsl(x4, 3), 32) 147 fmov d16, x8 148 mov x4, #0 149 mov v19.d[0], xzr 150 mov v19.d[1], x7 151 b 1b 152 153 /* store new state */ 1543: st1 {dgav.4s, dgbv.4s}, [x0] 155 mov w0, w2 156 ret 157SYM_FUNC_END(sha2_ce_transform) 158