diff options
Diffstat (limited to 'lib/crypto/mips/sha256.h')
| -rw-r--r-- | lib/crypto/mips/sha256.h | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/lib/crypto/mips/sha256.h b/lib/crypto/mips/sha256.h new file mode 100644 index 000000000000..ccccfd131634 --- /dev/null +++ b/lib/crypto/mips/sha256.h @@ -0,0 +1,58 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * SHA-256 Secure Hash Algorithm. + * + * Adapted for OCTEON by Aaro Koskinen <aaro.koskinen@iki.fi>. + * + * Based on crypto/sha256_generic.c, which is: + * + * Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com> + * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk> + * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> + * SHA224 Support Copyright 2007 Intel Corporation <jonathan.lynch@intel.com> + */ + +#include <asm/octeon/crypto.h> +#include <asm/octeon/octeon.h> + +/* + * We pass everything as 64-bit. OCTEON can handle misaligned data. + */ + +static void sha256_blocks(struct sha256_block_state *state, + const u8 *data, size_t nblocks) +{ + struct octeon_cop2_state cop2_state; + u64 *state64 = (u64 *)state; + unsigned long flags; + + if (!octeon_has_crypto()) + return sha256_blocks_generic(state, data, nblocks); + + flags = octeon_crypto_enable(&cop2_state); + write_octeon_64bit_hash_dword(state64[0], 0); + write_octeon_64bit_hash_dword(state64[1], 1); + write_octeon_64bit_hash_dword(state64[2], 2); + write_octeon_64bit_hash_dword(state64[3], 3); + + do { + const u64 *block = (const u64 *)data; + + write_octeon_64bit_block_dword(block[0], 0); + write_octeon_64bit_block_dword(block[1], 1); + write_octeon_64bit_block_dword(block[2], 2); + write_octeon_64bit_block_dword(block[3], 3); + write_octeon_64bit_block_dword(block[4], 4); + write_octeon_64bit_block_dword(block[5], 5); + write_octeon_64bit_block_dword(block[6], 6); + octeon_sha256_start(block[7]); + + data += SHA256_BLOCK_SIZE; + } while (--nblocks); + + state64[0] = read_octeon_64bit_hash_dword(0); + state64[1] = read_octeon_64bit_hash_dword(1); + state64[2] = read_octeon_64bit_hash_dword(2); + state64[3] = read_octeon_64bit_hash_dword(3); + octeon_crypto_disable(&cop2_state, flags); +} |