| /* |
| * sha2-ce-core.S - core SHA-224/SHA-256 transform using v8 Crypto Extensions |
| * |
| * Copyright (C) 2014 Linaro Ltd <ard.biesheuvel@linaro.org> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| #include <linux/linkage.h> |
| #include <asm/assembler.h> |
| |
| .text |
| .arch armv8-a+crypto |
| |
| dga .req q20 |
| dgav .req v20 |
| dgb .req q21 |
| dgbv .req v21 |
| |
| t0 .req v22 |
| t1 .req v23 |
| |
| dg0q .req q24 |
| dg0v .req v24 |
| dg1q .req q25 |
| dg1v .req v25 |
| dg2q .req q26 |
| dg2v .req v26 |
| |
| .macro add_only, ev, rc, s0 |
| mov dg2v.16b, dg0v.16b |
| .ifeq \ev |
| add t1.4s, v\s0\().4s, \rc\().4s |
| sha256h dg0q, dg1q, t0.4s |
| sha256h2 dg1q, dg2q, t0.4s |
| .else |
| .ifnb \s0 |
| add t0.4s, v\s0\().4s, \rc\().4s |
| .endif |
| sha256h dg0q, dg1q, t1.4s |
| sha256h2 dg1q, dg2q, t1.4s |
| .endif |
| .endm |
| |
| .macro add_update, ev, rc, s0, s1, s2, s3 |
| sha256su0 v\s0\().4s, v\s1\().4s |
| add_only \ev, \rc, \s1 |
| sha256su1 v\s0\().4s, v\s2\().4s, v\s3\().4s |
| .endm |
| |
| /* |
| * The SHA-256 round constants |
| */ |
| .section ".rodata", "a" |
| .align 4 |
| .Lsha2_rcon: |
| .word 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5 |
| .word 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5 |
| .word 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3 |
| .word 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174 |
| .word 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc |
| .word 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da |
| .word 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7 |
| .word 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967 |
| .word 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13 |
| .word 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85 |
| .word 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3 |
| .word 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070 |
| .word 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5 |
| .word 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3 |
| .word 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208 |
| .word 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2 |
| |
| /* |
| * void sha2_ce_transform(struct sha256_ce_state *sst, u8 const *src, |
| * int blocks) |
| */ |
| .text |
| ENTRY(sha2_ce_transform) |
| /* load round constants */ |
| adr_l x8, .Lsha2_rcon |
| ld1 { v0.4s- v3.4s}, [x8], #64 |
| ld1 { v4.4s- v7.4s}, [x8], #64 |
| ld1 { v8.4s-v11.4s}, [x8], #64 |
| ld1 {v12.4s-v15.4s}, [x8] |
| |
| /* load state */ |
| ld1 {dgav.4s, dgbv.4s}, [x0] |
| |
| /* load sha256_ce_state::finalize */ |
| ldr_l w4, sha256_ce_offsetof_finalize, x4 |
| ldr w4, [x0, x4] |
| |
| /* load input */ |
| 0: ld1 {v16.4s-v19.4s}, [x1], #64 |
| sub w2, w2, #1 |
| |
| CPU_LE( rev32 v16.16b, v16.16b ) |
| CPU_LE( rev32 v17.16b, v17.16b ) |
| CPU_LE( rev32 v18.16b, v18.16b ) |
| CPU_LE( rev32 v19.16b, v19.16b ) |
| |
| 1: add t0.4s, v16.4s, v0.4s |
| mov dg0v.16b, dgav.16b |
| mov dg1v.16b, dgbv.16b |
| |
| add_update 0, v1, 16, 17, 18, 19 |
| add_update 1, v2, 17, 18, 19, 16 |
| add_update 0, v3, 18, 19, 16, 17 |
| add_update 1, v4, 19, 16, 17, 18 |
| |
| add_update 0, v5, 16, 17, 18, 19 |
| add_update 1, v6, 17, 18, 19, 16 |
| add_update 0, v7, 18, 19, 16, 17 |
| add_update 1, v8, 19, 16, 17, 18 |
| |
| add_update 0, v9, 16, 17, 18, 19 |
| add_update 1, v10, 17, 18, 19, 16 |
| add_update 0, v11, 18, 19, 16, 17 |
| add_update 1, v12, 19, 16, 17, 18 |
| |
| add_only 0, v13, 17 |
| add_only 1, v14, 18 |
| add_only 0, v15, 19 |
| add_only 1 |
| |
| /* update state */ |
| add dgav.4s, dgav.4s, dg0v.4s |
| add dgbv.4s, dgbv.4s, dg1v.4s |
| |
| /* handled all input blocks? */ |
| cbnz w2, 0b |
| |
| /* |
| * Final block: add padding and total bit count. |
| * Skip if the input size was not a round multiple of the block size, |
| * the padding is handled by the C code in that case. |
| */ |
| cbz x4, 3f |
| ldr_l w4, sha256_ce_offsetof_count, x4 |
| ldr x4, [x0, x4] |
| movi v17.2d, #0 |
| mov x8, #0x80000000 |
| movi v18.2d, #0 |
| ror x7, x4, #29 // ror(lsl(x4, 3), 32) |
| fmov d16, x8 |
| mov x4, #0 |
| mov v19.d[0], xzr |
| mov v19.d[1], x7 |
| b 1b |
| |
| /* store new state */ |
| 3: st1 {dgav.4s, dgbv.4s}, [x0] |
| ret |
| ENDPROC(sha2_ce_transform) |
