1*e96cb950SEric Biggers /* SPDX-License-Identifier: GPL-2.0-or-later */ 2*e96cb950SEric Biggers /* 3*e96cb950SEric Biggers * SHA-256 Secure Hash Algorithm. 4*e96cb950SEric Biggers * 5*e96cb950SEric Biggers * Adapted for OCTEON by Aaro Koskinen <aaro.koskinen@iki.fi>. 6*e96cb950SEric Biggers * 7*e96cb950SEric Biggers * Based on crypto/sha256_generic.c, which is: 8*e96cb950SEric Biggers * 9*e96cb950SEric Biggers * Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com> 10*e96cb950SEric Biggers * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk> 11*e96cb950SEric Biggers * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> 12*e96cb950SEric Biggers * SHA224 Support Copyright 2007 Intel Corporation <jonathan.lynch@intel.com> 13*e96cb950SEric Biggers */ 14*e96cb950SEric Biggers 15*e96cb950SEric Biggers #include <asm/octeon/crypto.h> 16*e96cb950SEric Biggers #include <asm/octeon/octeon.h> 17*e96cb950SEric Biggers 18*e96cb950SEric Biggers /* 19*e96cb950SEric Biggers * We pass everything as 64-bit. OCTEON can handle misaligned data. 20*e96cb950SEric Biggers */ 21*e96cb950SEric Biggers 22*e96cb950SEric Biggers static void sha256_blocks(struct sha256_block_state *state, 23*e96cb950SEric Biggers const u8 *data, size_t nblocks) 24*e96cb950SEric Biggers { 25*e96cb950SEric Biggers struct octeon_cop2_state cop2_state; 26*e96cb950SEric Biggers u64 *state64 = (u64 *)state; 27*e96cb950SEric Biggers unsigned long flags; 28*e96cb950SEric Biggers 29*e96cb950SEric Biggers if (!octeon_has_crypto()) 30*e96cb950SEric Biggers return sha256_blocks_generic(state, data, nblocks); 31*e96cb950SEric Biggers 32*e96cb950SEric Biggers flags = octeon_crypto_enable(&cop2_state); 33*e96cb950SEric Biggers write_octeon_64bit_hash_dword(state64[0], 0); 34*e96cb950SEric Biggers write_octeon_64bit_hash_dword(state64[1], 1); 35*e96cb950SEric Biggers write_octeon_64bit_hash_dword(state64[2], 2); 36*e96cb950SEric Biggers write_octeon_64bit_hash_dword(state64[3], 3); 37*e96cb950SEric Biggers 38*e96cb950SEric Biggers do { 39*e96cb950SEric Biggers const u64 *block = (const u64 *)data; 40*e96cb950SEric Biggers 41*e96cb950SEric Biggers write_octeon_64bit_block_dword(block[0], 0); 42*e96cb950SEric Biggers write_octeon_64bit_block_dword(block[1], 1); 43*e96cb950SEric Biggers write_octeon_64bit_block_dword(block[2], 2); 44*e96cb950SEric Biggers write_octeon_64bit_block_dword(block[3], 3); 45*e96cb950SEric Biggers write_octeon_64bit_block_dword(block[4], 4); 46*e96cb950SEric Biggers write_octeon_64bit_block_dword(block[5], 5); 47*e96cb950SEric Biggers write_octeon_64bit_block_dword(block[6], 6); 48*e96cb950SEric Biggers octeon_sha256_start(block[7]); 49*e96cb950SEric Biggers 50*e96cb950SEric Biggers data += SHA256_BLOCK_SIZE; 51*e96cb950SEric Biggers } while (--nblocks); 52*e96cb950SEric Biggers 53*e96cb950SEric Biggers state64[0] = read_octeon_64bit_hash_dword(0); 54*e96cb950SEric Biggers state64[1] = read_octeon_64bit_hash_dword(1); 55*e96cb950SEric Biggers state64[2] = read_octeon_64bit_hash_dword(2); 56*e96cb950SEric Biggers state64[3] = read_octeon_64bit_hash_dword(3); 57*e96cb950SEric Biggers octeon_crypto_disable(&cop2_state, flags); 58*e96cb950SEric Biggers } 59