[thirdparty/u-boot.git] / lib / crc32.c

/*
 * 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
 */

#ifdef USE_HOSTCC
#include <arpa/inet.h>
#else
#include <common.h>
#include <efi_loader.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"

#ifdef USE_HOSTCC
#define __efi_runtime
#define __efi_runtime_data
#endif

#define tole(x) cpu_to_le32(x)

#ifdef CONFIG_DYNAMIC_CRC_TABLE

static int __efi_runtime_data crc_table_empty = 1;
static uint32_t __efi_runtime_data crc_table[256];
static void __efi_runtime 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.
*/
static void __efi_runtime make_crc_table(void)
{
  uint32_t c;
  int n, k;
  uLong poly;		/* polynomial exclusive-or pattern */
  /* terms of polynomial defining this crc (except x^32): */
  static Byte __efi_runtime_data 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)
 */

static const uint32_t __efi_runtime_data 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 CONFIG_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 __efi_runtime 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 CONFIG_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 __efi_runtime 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 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;
}

void crc32_wd_buf(const unsigned char *input, unsigned int ilen,
		unsigned char *output, unsigned int chunk_sz)
{
	uint32_t crc;

	crc = crc32_wd(0, input, ilen, chunk_sz);
	crc = htonl(crc);
	memcpy(output, &crc, sizeof(crc));
}
Commit	Line	Data
affae2bf WD	1	/*
	2	* This file is derived from crc32.c from the zlib-1.1.3 distribution
	3	* by Jean-loup Gailly and Mark Adler.
	4	*/
	5
	6	/* crc32.c -- compute the CRC-32 of a data stream
	7	* Copyright (C) 1995-1998 Mark Adler
	8	* For conditions of distribution and use, see copyright notice in zlib.h
	9	*/
	10
74a18ee8 SG	11	#ifdef USE_HOSTCC
	12	#include <arpa/inet.h>
	13	#else
b3aff0cb	14	#include <common.h>
483dbab9	15	#include <efi_loader.h>
affae2bf	16	#endif
3ee8c120 JT	17	#include <compiler.h>
3ee8c120 JT	18	#include <u-boot/crc.h>
affae2bf	19
f3b6d528	20	#if defined(CONFIG_HW_WATCHDOG) \|\| defined(CONFIG_WATCHDOG)
1de6b28b	21	#include <watchdog.h>
f3b6d528	22	#endif
a31e091a	23	#include "u-boot/zlib.h"
affae2bf	24
483dbab9 HS	25	#ifdef USE_HOSTCC
	26	#define __efi_runtime
	27	#define __efi_runtime_data
	28	#endif
affae2bf	29
3ee8c120 JT	30	#define tole(x) cpu_to_le32(x)
3ee8c120 JT	31
36c1877c	32	#ifdef CONFIG_DYNAMIC_CRC_TABLE
affae2bf	33
483dbab9 HS	34	static int __efi_runtime_data crc_table_empty = 1;
	35	static uint32_t __efi_runtime_data crc_table[256];
	36	static void __efi_runtime make_crc_table OF((void));
affae2bf WD	37
	38	/*
	39	Generate a table for a byte-wise 32-bit CRC calculation on the polynomial:
	40	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.
	41
	42	Polynomials over GF(2) are represented in binary, one bit per coefficient,
	43	with the lowest powers in the most significant bit. Then adding polynomials
	44	is just exclusive-or, and multiplying a polynomial by x is a right shift by
	45	one. If we call the above polynomial p, and represent a byte as the
	46	polynomial q, also with the lowest power in the most significant bit (so the
	47	byte 0xb1 is the polynomial x^7+x^3+x+1), then the CRC is (q*x^32) mod p,
	48	where a mod b means the remainder after dividing a by b.
	49
	50	This calculation is done using the shift-register method of multiplying and
	51	taking the remainder. The register is initialized to zero, and for each
	52	incoming bit, x^32 is added mod p to the register if the bit is a one (where
	53	x^32 mod p is p+x^32 = x^26+...+1), and the register is multiplied mod p by
	54	x (which is shifting right by one and adding x^32 mod p if the bit shifted
	55	out is a one). We start with the highest power (least significant bit) of
	56	q and repeat for all eight bits of q.
	57
	58	The table is simply the CRC of all possible eight bit values. This is all
	59	the information needed to generate CRC's on data a byte at a time for all
	60	combinations of CRC register values and incoming bytes.
	61	*/
483dbab9	62	static void __efi_runtime make_crc_table(void)
affae2bf	63	{
89cdab78	64	uint32_t c;
affae2bf	65	int n, k;
7ed40117	66	uLong poly; /* polynomial exclusive-or pattern */
affae2bf	67	/* terms of polynomial defining this crc (except x^32): */
5bdb0a7c HS	68	static Byte __efi_runtime_data p[] = {
5bdb0a7c HS	69	0, 1, 2, 4, 5, 7, 8, 10, 11, 12, 16, 22, 23, 26};
affae2bf WD	70
	71	/* make exclusive-or pattern from polynomial (0xedb88320L) */
	72	poly = 0L;
	73	for (n = 0; n < sizeof(p)/sizeof(Byte); n++)
	74	poly \|= 1L << (31 - p[n]);
	75
	76	for (n = 0; n < 256; n++)
	77	{
	78	c = (uLong)n;
	79	for (k = 0; k < 8; k++)
	80	c = c & 1 ? poly ^ (c >> 1) : c >> 1;
3ee8c120	81	crc_table[n] = tole(c);
affae2bf WD	82	}
	83	crc_table_empty = 0;
	84	}
	85	#else
	86	/* ========================================================================
	87	* Table of CRC-32's of all single-byte values (made by make_crc_table)
	88	*/
3ee8c120	89
483dbab9	90	static const uint32_t __efi_runtime_data crc_table[256] = {
3ee8c120 JT	91	tole(0x00000000L), tole(0x77073096L), tole(0xee0e612cL), tole(0x990951baL),
	92	tole(0x076dc419L), tole(0x706af48fL), tole(0xe963a535L), tole(0x9e6495a3L),
	93	tole(0x0edb8832L), tole(0x79dcb8a4L), tole(0xe0d5e91eL), tole(0x97d2d988L),
	94	tole(0x09b64c2bL), tole(0x7eb17cbdL), tole(0xe7b82d07L), tole(0x90bf1d91L),
	95	tole(0x1db71064L), tole(0x6ab020f2L), tole(0xf3b97148L), tole(0x84be41deL),
	96	tole(0x1adad47dL), tole(0x6ddde4ebL), tole(0xf4d4b551L), tole(0x83d385c7L),
	97	tole(0x136c9856L), tole(0x646ba8c0L), tole(0xfd62f97aL), tole(0x8a65c9ecL),
	98	tole(0x14015c4fL), tole(0x63066cd9L), tole(0xfa0f3d63L), tole(0x8d080df5L),
	99	tole(0x3b6e20c8L), tole(0x4c69105eL), tole(0xd56041e4L), tole(0xa2677172L),
	100	tole(0x3c03e4d1L), tole(0x4b04d447L), tole(0xd20d85fdL), tole(0xa50ab56bL),
	101	tole(0x35b5a8faL), tole(0x42b2986cL), tole(0xdbbbc9d6L), tole(0xacbcf940L),
	102	tole(0x32d86ce3L), tole(0x45df5c75L), tole(0xdcd60dcfL), tole(0xabd13d59L),
	103	tole(0x26d930acL), tole(0x51de003aL), tole(0xc8d75180L), tole(0xbfd06116L),
	104	tole(0x21b4f4b5L), tole(0x56b3c423L), tole(0xcfba9599L), tole(0xb8bda50fL),
	105	tole(0x2802b89eL), tole(0x5f058808L), tole(0xc60cd9b2L), tole(0xb10be924L),
	106	tole(0x2f6f7c87L), tole(0x58684c11L), tole(0xc1611dabL), tole(0xb6662d3dL),
	107	tole(0x76dc4190L), tole(0x01db7106L), tole(0x98d220bcL), tole(0xefd5102aL),
	108	tole(0x71b18589L), tole(0x06b6b51fL), tole(0x9fbfe4a5L), tole(0xe8b8d433L),
	109	tole(0x7807c9a2L), tole(0x0f00f934L), tole(0x9609a88eL), tole(0xe10e9818L),
	110	tole(0x7f6a0dbbL), tole(0x086d3d2dL), tole(0x91646c97L), tole(0xe6635c01L),
	111	tole(0x6b6b51f4L), tole(0x1c6c6162L), tole(0x856530d8L), tole(0xf262004eL),
	112	tole(0x6c0695edL), tole(0x1b01a57bL), tole(0x8208f4c1L), tole(0xf50fc457L),
	113	tole(0x65b0d9c6L), tole(0x12b7e950L), tole(0x8bbeb8eaL), tole(0xfcb9887cL),
	114	tole(0x62dd1ddfL), tole(0x15da2d49L), tole(0x8cd37cf3L), tole(0xfbd44c65L),
	115	tole(0x4db26158L), tole(0x3ab551ceL), tole(0xa3bc0074L), tole(0xd4bb30e2L),
	116	tole(0x4adfa541L), tole(0x3dd895d7L), tole(0xa4d1c46dL), tole(0xd3d6f4fbL),
	117	tole(0x4369e96aL), tole(0x346ed9fcL), tole(0xad678846L), tole(0xda60b8d0L),
	118	tole(0x44042d73L), tole(0x33031de5L), tole(0xaa0a4c5fL), tole(0xdd0d7cc9L),
	119	tole(0x5005713cL), tole(0x270241aaL), tole(0xbe0b1010L), tole(0xc90c2086L),
	120	tole(0x5768b525L), tole(0x206f85b3L), tole(0xb966d409L), tole(0xce61e49fL),
	121	tole(0x5edef90eL), tole(0x29d9c998L), tole(0xb0d09822L), tole(0xc7d7a8b4L),
	122	tole(0x59b33d17L), tole(0x2eb40d81L), tole(0xb7bd5c3bL), tole(0xc0ba6cadL),
	123	tole(0xedb88320L), tole(0x9abfb3b6L), tole(0x03b6e20cL), tole(0x74b1d29aL),
	124	tole(0xead54739L), tole(0x9dd277afL), tole(0x04db2615L), tole(0x73dc1683L),
	125	tole(0xe3630b12L), tole(0x94643b84L), tole(0x0d6d6a3eL), tole(0x7a6a5aa8L),
	126	tole(0xe40ecf0bL), tole(0x9309ff9dL), tole(0x0a00ae27L), tole(0x7d079eb1L),
	127	tole(0xf00f9344L), tole(0x8708a3d2L), tole(0x1e01f268L), tole(0x6906c2feL),
	128	tole(0xf762575dL), tole(0x806567cbL), tole(0x196c3671L), tole(0x6e6b06e7L),
	129	tole(0xfed41b76L), tole(0x89d32be0L), tole(0x10da7a5aL), tole(0x67dd4accL),
	130	tole(0xf9b9df6fL), tole(0x8ebeeff9L), tole(0x17b7be43L), tole(0x60b08ed5L),
	131	tole(0xd6d6a3e8L), tole(0xa1d1937eL), tole(0x38d8c2c4L), tole(0x4fdff252L),
	132	tole(0xd1bb67f1L), tole(0xa6bc5767L), tole(0x3fb506ddL), tole(0x48b2364bL),
	133	tole(0xd80d2bdaL), tole(0xaf0a1b4cL), tole(0x36034af6L), tole(0x41047a60L),
	134	tole(0xdf60efc3L), tole(0xa867df55L), tole(0x316e8eefL), tole(0x4669be79L),
	135	tole(0xcb61b38cL), tole(0xbc66831aL), tole(0x256fd2a0L), tole(0x5268e236L),
	136	tole(0xcc0c7795L), tole(0xbb0b4703L), tole(0x220216b9L), tole(0x5505262fL),
	137	tole(0xc5ba3bbeL), tole(0xb2bd0b28L), tole(0x2bb45a92L), tole(0x5cb36a04L),
	138	tole(0xc2d7ffa7L), tole(0xb5d0cf31L), tole(0x2cd99e8bL), tole(0x5bdeae1dL),
	139	tole(0x9b64c2b0L), tole(0xec63f226L), tole(0x756aa39cL), tole(0x026d930aL),
	140	tole(0x9c0906a9L), tole(0xeb0e363fL), tole(0x72076785L), tole(0x05005713L),
	141	tole(0x95bf4a82L), tole(0xe2b87a14L), tole(0x7bb12baeL), tole(0x0cb61b38L),
	142	tole(0x92d28e9bL), tole(0xe5d5be0dL), tole(0x7cdcefb7L), tole(0x0bdbdf21L),
	143	tole(0x86d3d2d4L), tole(0xf1d4e242L), tole(0x68ddb3f8L), tole(0x1fda836eL),
	144	tole(0x81be16cdL), tole(0xf6b9265bL), tole(0x6fb077e1L), tole(0x18b74777L),
	145	tole(0x88085ae6L), tole(0xff0f6a70L), tole(0x66063bcaL), tole(0x11010b5cL),
	146	tole(0x8f659effL), tole(0xf862ae69L), tole(0x616bffd3L), tole(0x166ccf45L),
	147	tole(0xa00ae278L), tole(0xd70dd2eeL), tole(0x4e048354L), tole(0x3903b3c2L),
	148	tole(0xa7672661L), tole(0xd06016f7L), tole(0x4969474dL), tole(0x3e6e77dbL),
	149	tole(0xaed16a4aL), tole(0xd9d65adcL), tole(0x40df0b66L), tole(0x37d83bf0L),
	150	tole(0xa9bcae53L), tole(0xdebb9ec5L), tole(0x47b2cf7fL), tole(0x30b5ffe9L),
	151	tole(0xbdbdf21cL), tole(0xcabac28aL), tole(0x53b39330L), tole(0x24b4a3a6L),
	152	tole(0xbad03605L), tole(0xcdd70693L), tole(0x54de5729L), tole(0x23d967bfL),
	153	tole(0xb3667a2eL), tole(0xc4614ab8L), tole(0x5d681b02L), tole(0x2a6f2b94L),
	154	tole(0xb40bbe37L), tole(0xc30c8ea1L), tole(0x5a05df1bL), tole(0x2d02ef8dL)
affae2bf WD	155	};
	156	#endif
	157
	158	#if 0
	159	/* =========================================================================
	160	* This function can be used by asm versions of crc32()
	161	*/
89cdab78	162	const uint32_t * ZEXPORT get_crc_table()
affae2bf	163	{
36c1877c	164	#ifdef CONFIG_DYNAMIC_CRC_TABLE
affae2bf WD	165	if (crc_table_empty) make_crc_table();
affae2bf WD	166	#endif
89cdab78	167	return (const uint32_t *)crc_table;
affae2bf WD	168	}
	169	#endif
	170
	171	/* ========================================================================= */
322ff395	172	# if __BYTE_ORDER == __LITTLE_ENDIAN
3ee8c120 JT	173	# define DO_CRC(x) crc = tab[(crc ^ (x)) & 255] ^ (crc >> 8)
	174	# else
	175	# define DO_CRC(x) crc = tab[((crc >> 24) ^ (x)) & 255] ^ (crc << 8)
	176	# endif
affae2bf WD	177
affae2bf WD	178	/* ========================================================================= */
affae2bf WD	179
	180	/* No ones complement version. JFFS2 (and other things ?)
	181	* don't use ones compliment in their CRC calculations.
	182	*/
483dbab9	183	uint32_t __efi_runtime crc32_no_comp(uint32_t crc, const Bytef *buf, uInt len)
affae2bf	184	{
3ee8c120 JT	185	const uint32_t *tab = crc_table;
	186	const uint32_t b =(const uint32_t )buf;
	187	size_t rem_len;
36c1877c	188	#ifdef CONFIG_DYNAMIC_CRC_TABLE
affae2bf WD	189	if (crc_table_empty)
	190	make_crc_table();
	191	#endif
3ee8c120 JT	192	crc = cpu_to_le32(crc);
	193	/* Align it */
	194	if (((long)b) & 3 && len) {
	195	uint8_t p = (uint8_t )b;
	196	do {
	197	DO_CRC(*p++);
	198	} while ((--len) && ((long)p)&3);
	199	b = (uint32_t *)p;
	200	}
	201
	202	rem_len = len & 3;
	203	len = len >> 2;
	204	for (--b; len; --len) {
	205	/* load data 32 bits wide, xor data 32 bits wide. */
	206	crc ^= ++b; / use pre increment for speed */
	207	DO_CRC(0);
	208	DO_CRC(0);
	209	DO_CRC(0);
	210	DO_CRC(0);
	211	}
	212	len = rem_len;
	213	/* And the last few bytes */
	214	if (len) {
	215	uint8_t p = (uint8_t )(b + 1) - 1;
	216	do {
	217	DO_CRC(++p); / use pre increment for speed */
	218	} while (--len);
affae2bf	219	}
affae2bf	220
3ee8c120	221	return le32_to_cpu(crc);
affae2bf	222	}
3ee8c120	223	#undef DO_CRC
affae2bf	224
483dbab9	225	uint32_t __efi_runtime crc32(uint32_t crc, const Bytef *p, uInt len)
3ee8c120 JT	226	{
	227	return crc32_no_comp(crc ^ 0xffffffffL, p, len) ^ 0xffffffffL;
	228	}
215b01bb BS	229
	230	/*
	231	* Calculate the crc32 checksum triggering the watchdog every 'chunk_sz' bytes
	232	* of input.
	233	*/
483dbab9 HS	234	uint32_t crc32_wd(uint32_t crc, const unsigned char *buf, uInt len,
483dbab9 HS	235	uInt chunk_sz)
215b01bb BS	236	{
	237	#if defined(CONFIG_HW_WATCHDOG) \|\| defined(CONFIG_WATCHDOG)
	238	const unsigned char end, curr;
	239	int chunk;
	240
	241	curr = buf;
	242	end = buf + len;
	243	while (curr < end) {
	244	chunk = end - curr;
	245	if (chunk > chunk_sz)
	246	chunk = chunk_sz;
	247	crc = crc32 (crc, curr, chunk);
	248	curr += chunk;
	249	WATCHDOG_RESET ();
	250	}
	251	#else
7ed40117	252	crc = crc32 (crc, buf, len);
215b01bb BS	253	#endif
	254
	255	return crc;
	256	}
d20a40de SG	257
	258	void crc32_wd_buf(const unsigned char *input, unsigned int ilen,
	259	unsigned char *output, unsigned int chunk_sz)
	260	{
	261	uint32_t crc;
	262
	263	crc = crc32_wd(0, input, ilen, chunk_sz);
74a18ee8	264	crc = htonl(crc);
d20a40de SG	265	memcpy(output, &crc, sizeof(crc));
d20a40de SG	266	}