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Diffstat (limited to 'lib_generic/crc32.c')
| -rw-r--r-- | lib_generic/crc32.c | 251 |
1 files changed, 0 insertions, 251 deletions
diff --git a/lib_generic/crc32.c b/lib_generic/crc32.c deleted file mode 100644 index 27335a3..0000000 --- a/lib_generic/crc32.c +++ /dev/null @@ -1,251 +0,0 @@ -/* - * This file is derived from crc32.c from the zlib-1.1.3 distribution - * by Jean-loup Gailly and Mark Adler. - */ - -/* crc32.c -- compute the CRC-32 of a data stream - * Copyright (C) 1995-1998 Mark Adler - * For conditions of distribution and use, see copyright notice in zlib.h - */ - -#ifndef USE_HOSTCC -#include <common.h> -#endif -#include <compiler.h> -#include <u-boot/crc.h> - -#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG) -#include <watchdog.h> -#endif -#include "u-boot/zlib.h" - -#define local static -#define ZEXPORT /* empty */ - -#define tole(x) cpu_to_le32(x) - -#ifdef DYNAMIC_CRC_TABLE - -local int crc_table_empty = 1; -local uint32_t crc_table[256]; -local void make_crc_table OF((void)); - -/* - Generate a table for a byte-wise 32-bit CRC calculation on the polynomial: - x^32+x^26+x^23+x^22+x^16+x^12+x^11+x^10+x^8+x^7+x^5+x^4+x^2+x+1. - - Polynomials over GF(2) are represented in binary, one bit per coefficient, - with the lowest powers in the most significant bit. Then adding polynomials - is just exclusive-or, and multiplying a polynomial by x is a right shift by - one. If we call the above polynomial p, and represent a byte as the - polynomial q, also with the lowest power in the most significant bit (so the - byte 0xb1 is the polynomial x^7+x^3+x+1), then the CRC is (q*x^32) mod p, - where a mod b means the remainder after dividing a by b. - - This calculation is done using the shift-register method of multiplying and - taking the remainder. The register is initialized to zero, and for each - incoming bit, x^32 is added mod p to the register if the bit is a one (where - x^32 mod p is p+x^32 = x^26+...+1), and the register is multiplied mod p by - x (which is shifting right by one and adding x^32 mod p if the bit shifted - out is a one). We start with the highest power (least significant bit) of - q and repeat for all eight bits of q. - - The table is simply the CRC of all possible eight bit values. This is all - the information needed to generate CRC's on data a byte at a time for all - combinations of CRC register values and incoming bytes. -*/ -local void make_crc_table() -{ - uint32_t c; - int n, k; - uLong poly; /* polynomial exclusive-or pattern */ - /* terms of polynomial defining this crc (except x^32): */ - static const Byte p[] = {0,1,2,4,5,7,8,10,11,12,16,22,23,26}; - - /* make exclusive-or pattern from polynomial (0xedb88320L) */ - poly = 0L; - for (n = 0; n < sizeof(p)/sizeof(Byte); n++) - poly |= 1L << (31 - p[n]); - - for (n = 0; n < 256; n++) - { - c = (uLong)n; - for (k = 0; k < 8; k++) - c = c & 1 ? poly ^ (c >> 1) : c >> 1; - crc_table[n] = tole(c); - } - crc_table_empty = 0; -} -#else -/* ======================================================================== - * Table of CRC-32's of all single-byte values (made by make_crc_table) - */ - -local const uint32_t crc_table[256] = { -tole(0x00000000L), tole(0x77073096L), tole(0xee0e612cL), tole(0x990951baL), -tole(0x076dc419L), tole(0x706af48fL), tole(0xe963a535L), tole(0x9e6495a3L), -tole(0x0edb8832L), tole(0x79dcb8a4L), tole(0xe0d5e91eL), tole(0x97d2d988L), -tole(0x09b64c2bL), tole(0x7eb17cbdL), tole(0xe7b82d07L), tole(0x90bf1d91L), -tole(0x1db71064L), tole(0x6ab020f2L), tole(0xf3b97148L), tole(0x84be41deL), -tole(0x1adad47dL), tole(0x6ddde4ebL), tole(0xf4d4b551L), tole(0x83d385c7L), -tole(0x136c9856L), tole(0x646ba8c0L), tole(0xfd62f97aL), tole(0x8a65c9ecL), -tole(0x14015c4fL), tole(0x63066cd9L), tole(0xfa0f3d63L), tole(0x8d080df5L), -tole(0x3b6e20c8L), tole(0x4c69105eL), tole(0xd56041e4L), tole(0xa2677172L), -tole(0x3c03e4d1L), tole(0x4b04d447L), tole(0xd20d85fdL), tole(0xa50ab56bL), -tole(0x35b5a8faL), tole(0x42b2986cL), tole(0xdbbbc9d6L), tole(0xacbcf940L), -tole(0x32d86ce3L), tole(0x45df5c75L), tole(0xdcd60dcfL), tole(0xabd13d59L), -tole(0x26d930acL), tole(0x51de003aL), tole(0xc8d75180L), tole(0xbfd06116L), -tole(0x21b4f4b5L), tole(0x56b3c423L), tole(0xcfba9599L), tole(0xb8bda50fL), -tole(0x2802b89eL), tole(0x5f058808L), tole(0xc60cd9b2L), tole(0xb10be924L), -tole(0x2f6f7c87L), tole(0x58684c11L), tole(0xc1611dabL), tole(0xb6662d3dL), -tole(0x76dc4190L), tole(0x01db7106L), tole(0x98d220bcL), tole(0xefd5102aL), -tole(0x71b18589L), tole(0x06b6b51fL), tole(0x9fbfe4a5L), tole(0xe8b8d433L), -tole(0x7807c9a2L), tole(0x0f00f934L), tole(0x9609a88eL), tole(0xe10e9818L), -tole(0x7f6a0dbbL), tole(0x086d3d2dL), tole(0x91646c97L), tole(0xe6635c01L), -tole(0x6b6b51f4L), tole(0x1c6c6162L), tole(0x856530d8L), tole(0xf262004eL), -tole(0x6c0695edL), tole(0x1b01a57bL), tole(0x8208f4c1L), tole(0xf50fc457L), -tole(0x65b0d9c6L), tole(0x12b7e950L), tole(0x8bbeb8eaL), tole(0xfcb9887cL), -tole(0x62dd1ddfL), tole(0x15da2d49L), tole(0x8cd37cf3L), tole(0xfbd44c65L), -tole(0x4db26158L), tole(0x3ab551ceL), tole(0xa3bc0074L), tole(0xd4bb30e2L), -tole(0x4adfa541L), tole(0x3dd895d7L), tole(0xa4d1c46dL), tole(0xd3d6f4fbL), -tole(0x4369e96aL), tole(0x346ed9fcL), tole(0xad678846L), tole(0xda60b8d0L), -tole(0x44042d73L), tole(0x33031de5L), tole(0xaa0a4c5fL), tole(0xdd0d7cc9L), -tole(0x5005713cL), tole(0x270241aaL), tole(0xbe0b1010L), tole(0xc90c2086L), -tole(0x5768b525L), tole(0x206f85b3L), tole(0xb966d409L), tole(0xce61e49fL), -tole(0x5edef90eL), tole(0x29d9c998L), tole(0xb0d09822L), tole(0xc7d7a8b4L), -tole(0x59b33d17L), tole(0x2eb40d81L), tole(0xb7bd5c3bL), tole(0xc0ba6cadL), -tole(0xedb88320L), tole(0x9abfb3b6L), tole(0x03b6e20cL), tole(0x74b1d29aL), -tole(0xead54739L), tole(0x9dd277afL), tole(0x04db2615L), tole(0x73dc1683L), -tole(0xe3630b12L), tole(0x94643b84L), tole(0x0d6d6a3eL), tole(0x7a6a5aa8L), -tole(0xe40ecf0bL), tole(0x9309ff9dL), tole(0x0a00ae27L), tole(0x7d079eb1L), -tole(0xf00f9344L), tole(0x8708a3d2L), tole(0x1e01f268L), tole(0x6906c2feL), -tole(0xf762575dL), tole(0x806567cbL), tole(0x196c3671L), tole(0x6e6b06e7L), -tole(0xfed41b76L), tole(0x89d32be0L), tole(0x10da7a5aL), tole(0x67dd4accL), -tole(0xf9b9df6fL), tole(0x8ebeeff9L), tole(0x17b7be43L), tole(0x60b08ed5L), -tole(0xd6d6a3e8L), tole(0xa1d1937eL), tole(0x38d8c2c4L), tole(0x4fdff252L), -tole(0xd1bb67f1L), tole(0xa6bc5767L), tole(0x3fb506ddL), tole(0x48b2364bL), -tole(0xd80d2bdaL), tole(0xaf0a1b4cL), tole(0x36034af6L), tole(0x41047a60L), -tole(0xdf60efc3L), tole(0xa867df55L), tole(0x316e8eefL), tole(0x4669be79L), -tole(0xcb61b38cL), tole(0xbc66831aL), tole(0x256fd2a0L), tole(0x5268e236L), -tole(0xcc0c7795L), tole(0xbb0b4703L), tole(0x220216b9L), tole(0x5505262fL), -tole(0xc5ba3bbeL), tole(0xb2bd0b28L), tole(0x2bb45a92L), tole(0x5cb36a04L), -tole(0xc2d7ffa7L), tole(0xb5d0cf31L), tole(0x2cd99e8bL), tole(0x5bdeae1dL), -tole(0x9b64c2b0L), tole(0xec63f226L), tole(0x756aa39cL), tole(0x026d930aL), -tole(0x9c0906a9L), tole(0xeb0e363fL), tole(0x72076785L), tole(0x05005713L), -tole(0x95bf4a82L), tole(0xe2b87a14L), tole(0x7bb12baeL), tole(0x0cb61b38L), -tole(0x92d28e9bL), tole(0xe5d5be0dL), tole(0x7cdcefb7L), tole(0x0bdbdf21L), -tole(0x86d3d2d4L), tole(0xf1d4e242L), tole(0x68ddb3f8L), tole(0x1fda836eL), -tole(0x81be16cdL), tole(0xf6b9265bL), tole(0x6fb077e1L), tole(0x18b74777L), -tole(0x88085ae6L), tole(0xff0f6a70L), tole(0x66063bcaL), tole(0x11010b5cL), -tole(0x8f659effL), tole(0xf862ae69L), tole(0x616bffd3L), tole(0x166ccf45L), -tole(0xa00ae278L), tole(0xd70dd2eeL), tole(0x4e048354L), tole(0x3903b3c2L), -tole(0xa7672661L), tole(0xd06016f7L), tole(0x4969474dL), tole(0x3e6e77dbL), -tole(0xaed16a4aL), tole(0xd9d65adcL), tole(0x40df0b66L), tole(0x37d83bf0L), -tole(0xa9bcae53L), tole(0xdebb9ec5L), tole(0x47b2cf7fL), tole(0x30b5ffe9L), -tole(0xbdbdf21cL), tole(0xcabac28aL), tole(0x53b39330L), tole(0x24b4a3a6L), -tole(0xbad03605L), tole(0xcdd70693L), tole(0x54de5729L), tole(0x23d967bfL), -tole(0xb3667a2eL), tole(0xc4614ab8L), tole(0x5d681b02L), tole(0x2a6f2b94L), -tole(0xb40bbe37L), tole(0xc30c8ea1L), tole(0x5a05df1bL), tole(0x2d02ef8dL) -}; -#endif - -#if 0 -/* ========================================================================= - * This function can be used by asm versions of crc32() - */ -const uint32_t * ZEXPORT get_crc_table() -{ -#ifdef DYNAMIC_CRC_TABLE - if (crc_table_empty) make_crc_table(); -#endif - return (const uint32_t *)crc_table; -} -#endif - -/* ========================================================================= */ -# if __BYTE_ORDER == __LITTLE_ENDIAN -# define DO_CRC(x) crc = tab[(crc ^ (x)) & 255] ^ (crc >> 8) -# else -# define DO_CRC(x) crc = tab[((crc >> 24) ^ (x)) & 255] ^ (crc << 8) -# endif - -/* ========================================================================= */ - -/* No ones complement version. JFFS2 (and other things ?) - * don't use ones compliment in their CRC calculations. - */ -uint32_t ZEXPORT crc32_no_comp(uint32_t crc, const Bytef *buf, uInt len) -{ - const uint32_t *tab = crc_table; - const uint32_t *b =(const uint32_t *)buf; - size_t rem_len; -#ifdef DYNAMIC_CRC_TABLE - if (crc_table_empty) - make_crc_table(); -#endif - crc = cpu_to_le32(crc); - /* Align it */ - if (((long)b) & 3 && len) { - uint8_t *p = (uint8_t *)b; - do { - DO_CRC(*p++); - } while ((--len) && ((long)p)&3); - b = (uint32_t *)p; - } - - rem_len = len & 3; - len = len >> 2; - for (--b; len; --len) { - /* load data 32 bits wide, xor data 32 bits wide. */ - crc ^= *++b; /* use pre increment for speed */ - DO_CRC(0); - DO_CRC(0); - DO_CRC(0); - DO_CRC(0); - } - len = rem_len; - /* And the last few bytes */ - if (len) { - uint8_t *p = (uint8_t *)(b + 1) - 1; - do { - DO_CRC(*++p); /* use pre increment for speed */ - } while (--len); - } - - return le32_to_cpu(crc); -} -#undef DO_CRC - -uint32_t ZEXPORT crc32 (uint32_t crc, const Bytef *p, uInt len) -{ - return crc32_no_comp(crc ^ 0xffffffffL, p, len) ^ 0xffffffffL; -} - -/* - * Calculate the crc32 checksum triggering the watchdog every 'chunk_sz' bytes - * of input. - */ -uint32_t ZEXPORT crc32_wd (uint32_t crc, - const unsigned char *buf, - uInt len, uInt chunk_sz) -{ -#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG) - const unsigned char *end, *curr; - int chunk; - - curr = buf; - end = buf + len; - while (curr < end) { - chunk = end - curr; - if (chunk > chunk_sz) - chunk = chunk_sz; - crc = crc32 (crc, curr, chunk); - curr += chunk; - WATCHDOG_RESET (); - } -#else - crc = crc32 (crc, buf, len); -#endif - - return crc; -} |