| /* |
| * sha2-ce-core.S - SHA-224/256 secure hash using ARMv8 Crypto Extensions |
| * |
| * Copyright (C) 2015 Linaro Ltd. |
| * Author: Ard Biesheuvel <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 |
| .fpu crypto-neon-fp-armv8 |
| |
| k0 .req q7 |
| k1 .req q8 |
| rk .req r3 |
| |
| ta0 .req q9 |
| ta1 .req q10 |
| tb0 .req q10 |
| tb1 .req q9 |
| |
| dga .req q11 |
| dgb .req q12 |
| |
| dg0 .req q13 |
| dg1 .req q14 |
| dg2 .req q15 |
| |
| .macro add_only, ev, s0 |
| vmov dg2, dg0 |
| .ifnb \s0 |
| vld1.32 {k\ev}, [rk, :128]! |
| .endif |
| sha256h.32 dg0, dg1, tb\ev |
| sha256h2.32 dg1, dg2, tb\ev |
| .ifnb \s0 |
| vadd.u32 ta\ev, q\s0, k\ev |
| .endif |
| .endm |
| |
| .macro add_update, ev, s0, s1, s2, s3 |
| sha256su0.32 q\s0, q\s1 |
| add_only \ev, \s1 |
| sha256su1.32 q\s0, q\s2, q\s3 |
| .endm |
| |
| .align 6 |
| .Lsha256_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_state *sst, u8 const *src, |
| int blocks); |
| */ |
| ENTRY(sha2_ce_transform) |
| /* load state */ |
| vld1.32 {dga-dgb}, [r0] |
| |
| /* load input */ |
| 0: vld1.32 {q0-q1}, [r1]! |
| vld1.32 {q2-q3}, [r1]! |
| subs r2, r2, #1 |
| |
| #ifndef CONFIG_CPU_BIG_ENDIAN |
| vrev32.8 q0, q0 |
| vrev32.8 q1, q1 |
| vrev32.8 q2, q2 |
| vrev32.8 q3, q3 |
| #endif |
| |
| /* load first round constant */ |
| adr rk, .Lsha256_rcon |
| vld1.32 {k0}, [rk, :128]! |
| |
| vadd.u32 ta0, q0, k0 |
| vmov dg0, dga |
| vmov dg1, dgb |
| |
| add_update 1, 0, 1, 2, 3 |
| add_update 0, 1, 2, 3, 0 |
| add_update 1, 2, 3, 0, 1 |
| add_update 0, 3, 0, 1, 2 |
| add_update 1, 0, 1, 2, 3 |
| add_update 0, 1, 2, 3, 0 |
| add_update 1, 2, 3, 0, 1 |
| add_update 0, 3, 0, 1, 2 |
| add_update 1, 0, 1, 2, 3 |
| add_update 0, 1, 2, 3, 0 |
| add_update 1, 2, 3, 0, 1 |
| add_update 0, 3, 0, 1, 2 |
| |
| add_only 1, 1 |
| add_only 0, 2 |
| add_only 1, 3 |
| add_only 0 |
| |
| /* update state */ |
| vadd.u32 dga, dga, dg0 |
| vadd.u32 dgb, dgb, dg1 |
| bne 0b |
| |
| /* store new state */ |
| vst1.32 {dga-dgb}, [r0] |
| bx lr |
| ENDPROC(sha2_ce_transform) |