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/*
* 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)
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