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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/lib/crypto/mips/sha512.h
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/* SPDX-License-Identifier: GPL-2.0-or-later */

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/*

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 * Cryptographic API.

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 *

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 * SHA-512 and SHA-384 Secure Hash Algorithm.

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 *

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 * Adapted for OCTEON by Aaro Koskinen <[email protected]>.

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 *

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 * Based on crypto/sha512_generic.c, which is:

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 *

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 * Copyright (c) Jean-Luc Cooke <[email protected]>

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 * Copyright (c) Andrew McDonald <[email protected]>

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 * Copyright (c) 2003 Kyle McMartin <[email protected]>

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 */

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#include <asm/octeon/crypto.h>

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#include <asm/octeon/octeon.h>

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/*

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 * We pass everything as 64-bit. OCTEON can handle misaligned data.

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 */

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static void sha512_blocks(struct sha512_block_state *state,

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			  const u8 *data, size_t nblocks)

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{

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	struct octeon_cop2_state cop2_state;

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	unsigned long flags;

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	if (!octeon_has_crypto())

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		return sha512_blocks_generic(state, data, nblocks);

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	flags = octeon_crypto_enable(&cop2_state);

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	write_octeon_64bit_hash_sha512(state->h[0], 0);

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	write_octeon_64bit_hash_sha512(state->h[1], 1);

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	write_octeon_64bit_hash_sha512(state->h[2], 2);

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	write_octeon_64bit_hash_sha512(state->h[3], 3);

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	write_octeon_64bit_hash_sha512(state->h[4], 4);

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	write_octeon_64bit_hash_sha512(state->h[5], 5);

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	write_octeon_64bit_hash_sha512(state->h[6], 6);

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	write_octeon_64bit_hash_sha512(state->h[7], 7);

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	do {

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		const u64 *block = (const u64 *)data;

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		write_octeon_64bit_block_sha512(block[0], 0);

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		write_octeon_64bit_block_sha512(block[1], 1);

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		write_octeon_64bit_block_sha512(block[2], 2);

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		write_octeon_64bit_block_sha512(block[3], 3);

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		write_octeon_64bit_block_sha512(block[4], 4);

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		write_octeon_64bit_block_sha512(block[5], 5);

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		write_octeon_64bit_block_sha512(block[6], 6);

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		write_octeon_64bit_block_sha512(block[7], 7);

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		write_octeon_64bit_block_sha512(block[8], 8);

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		write_octeon_64bit_block_sha512(block[9], 9);

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		write_octeon_64bit_block_sha512(block[10], 10);

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		write_octeon_64bit_block_sha512(block[11], 11);

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		write_octeon_64bit_block_sha512(block[12], 12);

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		write_octeon_64bit_block_sha512(block[13], 13);

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		write_octeon_64bit_block_sha512(block[14], 14);

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		octeon_sha512_start(block[15]);

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		data += SHA512_BLOCK_SIZE;

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	} while (--nblocks);

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	state->h[0] = read_octeon_64bit_hash_sha512(0);

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	state->h[1] = read_octeon_64bit_hash_sha512(1);

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	state->h[2] = read_octeon_64bit_hash_sha512(2);

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	state->h[3] = read_octeon_64bit_hash_sha512(3);

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	state->h[4] = read_octeon_64bit_hash_sha512(4);

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	state->h[5] = read_octeon_64bit_hash_sha512(5);

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	state->h[6] = read_octeon_64bit_hash_sha512(6);

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	state->h[7] = read_octeon_64bit_hash_sha512(7);

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	octeon_crypto_disable(&cop2_state, flags);

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}

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