1 /* 2 Copyright (c) 2018, MIPI Alliance, Inc. 3 All rights reserved. 4 5 Redistribution and use in source and binary forms, with or without 6 modification, are permitted provided that the following conditions 7 are met: 8 9 * Redistributions of source code must retain the above copyright 10 notice, this list of conditions and the following disclaimer. 11 12 * Redistributions in binary form must reproduce the above copyright 13 notice, this list of conditions and the following disclaimer in 14 the documentation and/or other materials provided with the 15 distribution. 16 17 * Neither the name of the copyright holder nor the names of its 18 contributors may be used to endorse or promote products derived 19 from this software without specific prior written permission. 20 21 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 24 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 25 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 /* 35 * Contributors: 36 * Norbert Schulz (Intel Corporation) - Initial API and implementation 37 */ 38 39 /* Defines for CRC32C computation */ 40 41 #ifndef MIPI_SYST_CRC32_INCLUDED 42 #define MIPI_SYST_CRC32_INCLUDED 43 44 #ifdef __cplusplus 45 extern "C" { 46 #endif 47 48 49 #if !defined(MIPI_SYST_PCFG_ENABLE_CHECKSUM) 50 51 #define MIPI_SYST_CRC32_INIT(v) 52 #define MIPI_SYST_CRC32_GET(v) 53 54 #define MIPI_SYST_CRC32_U8(crc, v) 55 #define MIPI_SYST_CRC32_U16(crc, v) 56 #define MIPI_SYST_CRC32_U32(crc, v) 57 #define MIPI_SYST_CRC32_U64(crc, v) 58 59 #else 60 61 extern const mipi_syst_u32 mipi_syst_crc_table[256]; 62 63 #define MIPI_SYST_CRC32_INIT(v) ((v) ^ 0xFFFFFFFF) 64 #define MIPI_SYST_CRC32_GET(v) ((v) ^ 0xFFFFFFFF) 65 66 #define MIPI_SYST_CRC32_U8(crc, v) { crc = mipi_syst_crc32_8((crc), (v)); } 67 #define MIPI_SYST_CRC32_U16(crc, v) { crc = mipi_syst_crc32_16((crc), (v)); } 68 #define MIPI_SYST_CRC32_U32(crc, v) { crc = mipi_syst_crc32_32((crc), (v)); } 69 #define MIPI_SYST_CRC32_U64(crc, v) { crc = mipi_syst_crc32_64((crc), (v)); } 70 71 #if !defined(MIPI_SYST_PCFG_ENABLE_INLINE) 72 73 MIPI_SYST_INLINE mipi_syst_u32 mipi_syst_crc32_8(mipi_syst_u32 crc, mipi_syst_u8 b); 74 MIPI_SYST_INLINE mipi_syst_u32 mipi_syst_crc32_16(mipi_syst_u32 crc, mipi_syst_u16 hw); 75 MIPI_SYST_INLINE mipi_syst_u32 mipi_syst_crc32_32(mipi_syst_u32 crc, mipi_syst_u32 hw); 76 MIPI_SYST_INLINE mipi_syst_u32 mipi_syst_crc32_64(mipi_syst_u32 crc, mipi_syst_u64 hw); 77 78 #else 79 80 MIPI_SYST_INLINE mipi_syst_u32 mipi_syst_crc32_8(mipi_syst_u32 crc, mipi_syst_u8 b) 81 { 82 #if (defined(MIPI_SYST_CRC_INTRINSIC)) 83 return _MIPI_SYST_CPU_CRC8(crc, b); 84 #else 85 return mipi_syst_crc_table[((int) crc ^ b) & 0xff] ^ (crc >> 8); 86 #endif 87 } 88 89 MIPI_SYST_INLINE mipi_syst_u32 mipi_syst_crc32_16(mipi_syst_u32 crc, mipi_syst_u16 s) 90 { 91 #if (defined(MIPI_SYST_CRC_INTRINSIC)) 92 return _MIPI_SYST_CPU_CRC16(crc, s); 93 #else 94 crc = mipi_syst_crc32_8(crc, (mipi_syst_u8) s); 95 crc = mipi_syst_crc32_8(crc, (mipi_syst_u8) (s >> 8)); 96 return crc; 97 #endif 98 } 99 100 101 MIPI_SYST_INLINE mipi_syst_u32 mipi_syst_crc32_32(mipi_syst_u32 crc, mipi_syst_u32 w) 102 { 103 #if (defined(MIPI_SYST_CRC_INTRINSIC)) 104 return _MIPI_SYST_CPU_CRC32(crc, w); 105 #else 106 107 crc = mipi_syst_crc32_8(crc, (mipi_syst_u8) w); 108 crc = mipi_syst_crc32_8(crc, (mipi_syst_u8) (w >> 8)); 109 crc = mipi_syst_crc32_8(crc, (mipi_syst_u8) (w >> 16)); 110 crc = mipi_syst_crc32_8(crc, (mipi_syst_u8) (w >> 24)); 111 return crc; 112 #endif 113 } 114 115 MIPI_SYST_INLINE mipi_syst_u32 mipi_syst_crc32_64(mipi_syst_u32 crc, mipi_syst_u64 l) 116 { 117 #if (defined(MIPI_SYST_CRC_INTRINSIC)) 118 return _MIPI_SYST_CPU_CRC64(crc, l); 119 #else 120 crc = mipi_syst_crc32_8(crc, (mipi_syst_u8) l); 121 crc = mipi_syst_crc32_8(crc, (mipi_syst_u8) (l >> 8)); 122 crc = mipi_syst_crc32_8(crc, (mipi_syst_u8) (l >> 16)); 123 crc = mipi_syst_crc32_8(crc, (mipi_syst_u8) (l >> 24)); 124 crc = mipi_syst_crc32_8(crc, (mipi_syst_u8) (l >> 32)); 125 crc = mipi_syst_crc32_8(crc, (mipi_syst_u8) (l >> 40)); 126 crc = mipi_syst_crc32_8(crc, (mipi_syst_u8) (l >> 48)); 127 crc = mipi_syst_crc32_8(crc, (mipi_syst_u8) (l >> 56)); 128 return crc; 129 #endif 130 } 131 #endif 132 #endif /* defined(MIPI_SYST_PCFG_ENABLE_CHECKSUM) */ 133 134 #ifdef __cplusplus 135 } /* extern C */ 136 #endif 137 138 #endif 139
