[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>
#include <u-boot/crc.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
#define __efi_runtime_rodata
#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;
}
#elif !defined(CONFIG_ARM64_CRC32)
/* ========================================================================
 * Table of CRC-32's of all single-byte values (made by make_crc_table)
 */

static const uint32_t __efi_runtime_rodata 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)
{
#ifdef CONFIG_ARM64_CRC32
    crc = cpu_to_le32(crc);
    while (len--)
        crc = __builtin_aarch64_crc32b(crc, *buf++);
    return le32_to_cpu(crc);
#else
    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);
#endif
}
#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
74a18ee8 SG	12	#include <arpa/inet.h>
3db71108	13	#include <u-boot/crc.h>
74a18ee8	14	#else
b3aff0cb	15	#include <common.h>
483dbab9	16	#include <efi_loader.h>
affae2bf	17	#endif
3ee8c120 JT	18	#include <compiler.h>
3ee8c120 JT	19	#include <u-boot/crc.h>
affae2bf	20
f3b6d528	21	#if defined(CONFIG_HW_WATCHDOG) \|\| defined(CONFIG_WATCHDOG)
1de6b28b	22	#include <watchdog.h>
f3b6d528	23	#endif
a31e091a	24	#include "u-boot/zlib.h"
affae2bf	25
483dbab9 HS	26	#ifdef USE_HOSTCC
	27	#define __efi_runtime
	28	#define __efi_runtime_data
98e55f97	29	#define __efi_runtime_rodata
483dbab9	30	#endif
affae2bf	31
3ee8c120 JT	32	#define tole(x) cpu_to_le32(x)
3ee8c120 JT	33
36c1877c	34	#ifdef CONFIG_DYNAMIC_CRC_TABLE
affae2bf	35
483dbab9 HS	36	static int __efi_runtime_data crc_table_empty = 1;
	37	static uint32_t __efi_runtime_data crc_table[256];
	38	static void __efi_runtime make_crc_table OF((void));
affae2bf WD	39
	40	/*
	41	Generate a table for a byte-wise 32-bit CRC calculation on the polynomial:
	42	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.
	43
	44	Polynomials over GF(2) are represented in binary, one bit per coefficient,
	45	with the lowest powers in the most significant bit. Then adding polynomials
	46	is just exclusive-or, and multiplying a polynomial by x is a right shift by
	47	one. If we call the above polynomial p, and represent a byte as the
	48	polynomial q, also with the lowest power in the most significant bit (so the
	49	byte 0xb1 is the polynomial x^7+x^3+x+1), then the CRC is (q*x^32) mod p,
	50	where a mod b means the remainder after dividing a by b.
	51
	52	This calculation is done using the shift-register method of multiplying and
	53	taking the remainder. The register is initialized to zero, and for each
	54	incoming bit, x^32 is added mod p to the register if the bit is a one (where
	55	x^32 mod p is p+x^32 = x^26+...+1), and the register is multiplied mod p by
	56	x (which is shifting right by one and adding x^32 mod p if the bit shifted
	57	out is a one). We start with the highest power (least significant bit) of
	58	q and repeat for all eight bits of q.
	59
	60	The table is simply the CRC of all possible eight bit values. This is all
	61	the information needed to generate CRC's on data a byte at a time for all
	62	combinations of CRC register values and incoming bytes.
	63	*/
483dbab9	64	static void __efi_runtime make_crc_table(void)
affae2bf	65	{
89cdab78	66	uint32_t c;
affae2bf	67	int n, k;
7ed40117	68	uLong poly; /* polynomial exclusive-or pattern */
affae2bf	69	/* terms of polynomial defining this crc (except x^32): */
5bdb0a7c HS	70	static Byte __efi_runtime_data p[] = {
5bdb0a7c HS	71	0, 1, 2, 4, 5, 7, 8, 10, 11, 12, 16, 22, 23, 26};
affae2bf WD	72
	73	/* make exclusive-or pattern from polynomial (0xedb88320L) */
	74	poly = 0L;
	75	for (n = 0; n < sizeof(p)/sizeof(Byte); n++)
	76	poly \|= 1L << (31 - p[n]);
	77
	78	for (n = 0; n < 256; n++)
	79	{
	80	c = (uLong)n;
	81	for (k = 0; k < 8; k++)
	82	c = c & 1 ? poly ^ (c >> 1) : c >> 1;
3ee8c120	83	crc_table[n] = tole(c);
affae2bf WD	84	}
	85	crc_table_empty = 0;
	86	}
270f8710	87	#elif !defined(CONFIG_ARM64_CRC32)
affae2bf WD	88	/* ========================================================================
	89	* Table of CRC-32's of all single-byte values (made by make_crc_table)
	90	*/
3ee8c120	91
98e55f97	92	static const uint32_t __efi_runtime_rodata crc_table[256] = {
3ee8c120 JT	93	tole(0x00000000L), tole(0x77073096L), tole(0xee0e612cL), tole(0x990951baL),
	94	tole(0x076dc419L), tole(0x706af48fL), tole(0xe963a535L), tole(0x9e6495a3L),
	95	tole(0x0edb8832L), tole(0x79dcb8a4L), tole(0xe0d5e91eL), tole(0x97d2d988L),
	96	tole(0x09b64c2bL), tole(0x7eb17cbdL), tole(0xe7b82d07L), tole(0x90bf1d91L),
	97	tole(0x1db71064L), tole(0x6ab020f2L), tole(0xf3b97148L), tole(0x84be41deL),
	98	tole(0x1adad47dL), tole(0x6ddde4ebL), tole(0xf4d4b551L), tole(0x83d385c7L),
	99	tole(0x136c9856L), tole(0x646ba8c0L), tole(0xfd62f97aL), tole(0x8a65c9ecL),
	100	tole(0x14015c4fL), tole(0x63066cd9L), tole(0xfa0f3d63L), tole(0x8d080df5L),
	101	tole(0x3b6e20c8L), tole(0x4c69105eL), tole(0xd56041e4L), tole(0xa2677172L),
	102	tole(0x3c03e4d1L), tole(0x4b04d447L), tole(0xd20d85fdL), tole(0xa50ab56bL),
	103	tole(0x35b5a8faL), tole(0x42b2986cL), tole(0xdbbbc9d6L), tole(0xacbcf940L),
	104	tole(0x32d86ce3L), tole(0x45df5c75L), tole(0xdcd60dcfL), tole(0xabd13d59L),
	105	tole(0x26d930acL), tole(0x51de003aL), tole(0xc8d75180L), tole(0xbfd06116L),
	106	tole(0x21b4f4b5L), tole(0x56b3c423L), tole(0xcfba9599L), tole(0xb8bda50fL),
	107	tole(0x2802b89eL), tole(0x5f058808L), tole(0xc60cd9b2L), tole(0xb10be924L),
	108	tole(0x2f6f7c87L), tole(0x58684c11L), tole(0xc1611dabL), tole(0xb6662d3dL),
	109	tole(0x76dc4190L), tole(0x01db7106L), tole(0x98d220bcL), tole(0xefd5102aL),
	110	tole(0x71b18589L), tole(0x06b6b51fL), tole(0x9fbfe4a5L), tole(0xe8b8d433L),
	111	tole(0x7807c9a2L), tole(0x0f00f934L), tole(0x9609a88eL), tole(0xe10e9818L),
	112	tole(0x7f6a0dbbL), tole(0x086d3d2dL), tole(0x91646c97L), tole(0xe6635c01L),
	113	tole(0x6b6b51f4L), tole(0x1c6c6162L), tole(0x856530d8L), tole(0xf262004eL),
	114	tole(0x6c0695edL), tole(0x1b01a57bL), tole(0x8208f4c1L), tole(0xf50fc457L),
	115	tole(0x65b0d9c6L), tole(0x12b7e950L), tole(0x8bbeb8eaL), tole(0xfcb9887cL),
	116	tole(0x62dd1ddfL), tole(0x15da2d49L), tole(0x8cd37cf3L), tole(0xfbd44c65L),
	117	tole(0x4db26158L), tole(0x3ab551ceL), tole(0xa3bc0074L), tole(0xd4bb30e2L),
	118	tole(0x4adfa541L), tole(0x3dd895d7L), tole(0xa4d1c46dL), tole(0xd3d6f4fbL),
	119	tole(0x4369e96aL), tole(0x346ed9fcL), tole(0xad678846L), tole(0xda60b8d0L),
	120	tole(0x44042d73L), tole(0x33031de5L), tole(0xaa0a4c5fL), tole(0xdd0d7cc9L),
	121	tole(0x5005713cL), tole(0x270241aaL), tole(0xbe0b1010L), tole(0xc90c2086L),
	122	tole(0x5768b525L), tole(0x206f85b3L), tole(0xb966d409L), tole(0xce61e49fL),
	123	tole(0x5edef90eL), tole(0x29d9c998L), tole(0xb0d09822L), tole(0xc7d7a8b4L),
	124	tole(0x59b33d17L), tole(0x2eb40d81L), tole(0xb7bd5c3bL), tole(0xc0ba6cadL),
	125	tole(0xedb88320L), tole(0x9abfb3b6L), tole(0x03b6e20cL), tole(0x74b1d29aL),
	126	tole(0xead54739L), tole(0x9dd277afL), tole(0x04db2615L), tole(0x73dc1683L),
	127	tole(0xe3630b12L), tole(0x94643b84L), tole(0x0d6d6a3eL), tole(0x7a6a5aa8L),
	128	tole(0xe40ecf0bL), tole(0x9309ff9dL), tole(0x0a00ae27L), tole(0x7d079eb1L),
	129	tole(0xf00f9344L), tole(0x8708a3d2L), tole(0x1e01f268L), tole(0x6906c2feL),
	130	tole(0xf762575dL), tole(0x806567cbL), tole(0x196c3671L), tole(0x6e6b06e7L),
	131	tole(0xfed41b76L), tole(0x89d32be0L), tole(0x10da7a5aL), tole(0x67dd4accL),
	132	tole(0xf9b9df6fL), tole(0x8ebeeff9L), tole(0x17b7be43L), tole(0x60b08ed5L),
	133	tole(0xd6d6a3e8L), tole(0xa1d1937eL), tole(0x38d8c2c4L), tole(0x4fdff252L),
	134	tole(0xd1bb67f1L), tole(0xa6bc5767L), tole(0x3fb506ddL), tole(0x48b2364bL),
	135	tole(0xd80d2bdaL), tole(0xaf0a1b4cL), tole(0x36034af6L), tole(0x41047a60L),
	136	tole(0xdf60efc3L), tole(0xa867df55L), tole(0x316e8eefL), tole(0x4669be79L),
	137	tole(0xcb61b38cL), tole(0xbc66831aL), tole(0x256fd2a0L), tole(0x5268e236L),
	138	tole(0xcc0c7795L), tole(0xbb0b4703L), tole(0x220216b9L), tole(0x5505262fL),
	139	tole(0xc5ba3bbeL), tole(0xb2bd0b28L), tole(0x2bb45a92L), tole(0x5cb36a04L),
	140	tole(0xc2d7ffa7L), tole(0xb5d0cf31L), tole(0x2cd99e8bL), tole(0x5bdeae1dL),
	141	tole(0x9b64c2b0L), tole(0xec63f226L), tole(0x756aa39cL), tole(0x026d930aL),
	142	tole(0x9c0906a9L), tole(0xeb0e363fL), tole(0x72076785L), tole(0x05005713L),
	143	tole(0x95bf4a82L), tole(0xe2b87a14L), tole(0x7bb12baeL), tole(0x0cb61b38L),
	144	tole(0x92d28e9bL), tole(0xe5d5be0dL), tole(0x7cdcefb7L), tole(0x0bdbdf21L),
	145	tole(0x86d3d2d4L), tole(0xf1d4e242L), tole(0x68ddb3f8L), tole(0x1fda836eL),
	146	tole(0x81be16cdL), tole(0xf6b9265bL), tole(0x6fb077e1L), tole(0x18b74777L),
	147	tole(0x88085ae6L), tole(0xff0f6a70L), tole(0x66063bcaL), tole(0x11010b5cL),
	148	tole(0x8f659effL), tole(0xf862ae69L), tole(0x616bffd3L), tole(0x166ccf45L),
	149	tole(0xa00ae278L), tole(0xd70dd2eeL), tole(0x4e048354L), tole(0x3903b3c2L),
	150	tole(0xa7672661L), tole(0xd06016f7L), tole(0x4969474dL), tole(0x3e6e77dbL),
	151	tole(0xaed16a4aL), tole(0xd9d65adcL), tole(0x40df0b66L), tole(0x37d83bf0L),
	152	tole(0xa9bcae53L), tole(0xdebb9ec5L), tole(0x47b2cf7fL), tole(0x30b5ffe9L),
	153	tole(0xbdbdf21cL), tole(0xcabac28aL), tole(0x53b39330L), tole(0x24b4a3a6L),
	154	tole(0xbad03605L), tole(0xcdd70693L), tole(0x54de5729L), tole(0x23d967bfL),
	155	tole(0xb3667a2eL), tole(0xc4614ab8L), tole(0x5d681b02L), tole(0x2a6f2b94L),
	156	tole(0xb40bbe37L), tole(0xc30c8ea1L), tole(0x5a05df1bL), tole(0x2d02ef8dL)
affae2bf WD	157	};
	158	#endif
	159
	160	#if 0
	161	/* =========================================================================
	162	* This function can be used by asm versions of crc32()
	163	*/
89cdab78	164	const uint32_t * ZEXPORT get_crc_table()
affae2bf	165	{
36c1877c	166	#ifdef CONFIG_DYNAMIC_CRC_TABLE
affae2bf WD	167	if (crc_table_empty) make_crc_table();
affae2bf WD	168	#endif
89cdab78	169	return (const uint32_t *)crc_table;
affae2bf WD	170	}
	171	#endif
	172
	173	/* ========================================================================= */
322ff395	174	# if __BYTE_ORDER == __LITTLE_ENDIAN
3ee8c120 JT	175	# define DO_CRC(x) crc = tab[(crc ^ (x)) & 255] ^ (crc >> 8)
	176	# else
	177	# define DO_CRC(x) crc = tab[((crc >> 24) ^ (x)) & 255] ^ (crc << 8)
	178	# endif
affae2bf WD	179
affae2bf WD	180	/* ========================================================================= */
affae2bf WD	181
	182	/* No ones complement version. JFFS2 (and other things ?)
	183	* don't use ones compliment in their CRC calculations.
	184	*/
483dbab9	185	uint32_t __efi_runtime crc32_no_comp(uint32_t crc, const Bytef *buf, uInt len)
affae2bf	186	{
270f8710 MV	187	#ifdef CONFIG_ARM64_CRC32
	188	crc = cpu_to_le32(crc);
	189	while (len--)
	190	crc = __builtin_aarch64_crc32b(crc, *buf++);
	191	return le32_to_cpu(crc);
	192	#else
3ee8c120 JT	193	const uint32_t *tab = crc_table;
	194	const uint32_t b =(const uint32_t )buf;
	195	size_t rem_len;
36c1877c	196	#ifdef CONFIG_DYNAMIC_CRC_TABLE
affae2bf WD	197	if (crc_table_empty)
	198	make_crc_table();
	199	#endif
3ee8c120 JT	200	crc = cpu_to_le32(crc);
	201	/* Align it */
	202	if (((long)b) & 3 && len) {
	203	uint8_t p = (uint8_t )b;
	204	do {
	205	DO_CRC(*p++);
	206	} while ((--len) && ((long)p)&3);
	207	b = (uint32_t *)p;
	208	}
	209
	210	rem_len = len & 3;
	211	len = len >> 2;
	212	for (--b; len; --len) {
	213	/* load data 32 bits wide, xor data 32 bits wide. */
	214	crc ^= ++b; / use pre increment for speed */
	215	DO_CRC(0);
	216	DO_CRC(0);
	217	DO_CRC(0);
	218	DO_CRC(0);
	219	}
	220	len = rem_len;
	221	/* And the last few bytes */
	222	if (len) {
	223	uint8_t p = (uint8_t )(b + 1) - 1;
	224	do {
	225	DO_CRC(++p); / use pre increment for speed */
	226	} while (--len);
affae2bf	227	}
affae2bf	228
3ee8c120	229	return le32_to_cpu(crc);
270f8710	230	#endif
affae2bf	231	}
3ee8c120	232	#undef DO_CRC
affae2bf	233
483dbab9	234	uint32_t __efi_runtime crc32(uint32_t crc, const Bytef *p, uInt len)
3ee8c120 JT	235	{
	236	return crc32_no_comp(crc ^ 0xffffffffL, p, len) ^ 0xffffffffL;
	237	}
215b01bb BS	238
	239	/*
	240	* Calculate the crc32 checksum triggering the watchdog every 'chunk_sz' bytes
	241	* of input.
	242	*/
483dbab9 HS	243	uint32_t crc32_wd(uint32_t crc, const unsigned char *buf, uInt len,
483dbab9 HS	244	uInt chunk_sz)
215b01bb BS	245	{
	246	#if defined(CONFIG_HW_WATCHDOG) \|\| defined(CONFIG_WATCHDOG)
	247	const unsigned char end, curr;
	248	int chunk;
	249
	250	curr = buf;
	251	end = buf + len;
	252	while (curr < end) {
	253	chunk = end - curr;
	254	if (chunk > chunk_sz)
	255	chunk = chunk_sz;
b2ea91ba	256	crc = crc32(crc, curr, chunk);
215b01bb BS	257	curr += chunk;
	258	WATCHDOG_RESET ();
	259	}
	260	#else
b2ea91ba	261	crc = crc32(crc, buf, len);
215b01bb BS	262	#endif
	263
	264	return crc;
	265	}
d20a40de SG	266
	267	void crc32_wd_buf(const unsigned char *input, unsigned int ilen,
	268	unsigned char *output, unsigned int chunk_sz)
	269	{
	270	uint32_t crc;
	271
	272	crc = crc32_wd(0, input, ilen, chunk_sz);
74a18ee8	273	crc = htonl(crc);
d20a40de SG	274	memcpy(output, &crc, sizeof(crc));
d20a40de SG	275	}