sha512.h

 1/* SPDX-License-Identifier: GPL-2.0-or-later */
 2/*
 3 * Cryptographic API.
 4 *
 5 * SHA-512 and SHA-384 Secure Hash Algorithm.
 6 *
 7 * Adapted for OCTEON by Aaro Koskinen <aaro.koskinen@iki.fi>.
 8 *
 9 * Based on crypto/sha512_generic.c, which is:
10 *
11 * Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
12 * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
13 * Copyright (c) 2003 Kyle McMartin <kyle@debian.org>
14 */
15
16#include <asm/octeon/crypto.h>
17#include <asm/octeon/octeon.h>
18
19/*
20 * We pass everything as 64-bit. OCTEON can handle misaligned data.
21 */
22
23static void sha512_blocks(struct sha512_block_state *state,
24			  const u8 *data, size_t nblocks)
25{
26	struct octeon_cop2_state cop2_state;
27	unsigned long flags;
28
29	if (!octeon_has_crypto())
30		return sha512_blocks_generic(state, data, nblocks);
31
32	flags = octeon_crypto_enable(&cop2_state);
33	write_octeon_64bit_hash_sha512(state->h[0], 0);
34	write_octeon_64bit_hash_sha512(state->h[1], 1);
35	write_octeon_64bit_hash_sha512(state->h[2], 2);
36	write_octeon_64bit_hash_sha512(state->h[3], 3);
37	write_octeon_64bit_hash_sha512(state->h[4], 4);
38	write_octeon_64bit_hash_sha512(state->h[5], 5);
39	write_octeon_64bit_hash_sha512(state->h[6], 6);
40	write_octeon_64bit_hash_sha512(state->h[7], 7);
41
42	do {
43		const u64 *block = (const u64 *)data;
44
45		write_octeon_64bit_block_sha512(block[0], 0);
46		write_octeon_64bit_block_sha512(block[1], 1);
47		write_octeon_64bit_block_sha512(block[2], 2);
48		write_octeon_64bit_block_sha512(block[3], 3);
49		write_octeon_64bit_block_sha512(block[4], 4);
50		write_octeon_64bit_block_sha512(block[5], 5);
51		write_octeon_64bit_block_sha512(block[6], 6);
52		write_octeon_64bit_block_sha512(block[7], 7);
53		write_octeon_64bit_block_sha512(block[8], 8);
54		write_octeon_64bit_block_sha512(block[9], 9);
55		write_octeon_64bit_block_sha512(block[10], 10);
56		write_octeon_64bit_block_sha512(block[11], 11);
57		write_octeon_64bit_block_sha512(block[12], 12);
58		write_octeon_64bit_block_sha512(block[13], 13);
59		write_octeon_64bit_block_sha512(block[14], 14);
60		octeon_sha512_start(block[15]);
61
62		data += SHA512_BLOCK_SIZE;
63	} while (--nblocks);
64
65	state->h[0] = read_octeon_64bit_hash_sha512(0);
66	state->h[1] = read_octeon_64bit_hash_sha512(1);
67	state->h[2] = read_octeon_64bit_hash_sha512(2);
68	state->h[3] = read_octeon_64bit_hash_sha512(3);
69	state->h[4] = read_octeon_64bit_hash_sha512(4);
70	state->h[5] = read_octeon_64bit_hash_sha512(5);
71	state->h[6] = read_octeon_64bit_hash_sha512(6);
72	state->h[7] = read_octeon_64bit_hash_sha512(7);
73	octeon_crypto_disable(&cop2_state, flags);
74}