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"Das U-Boot" Source Tree
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * (C) Copyright 2001
4 * Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
5 */
6
7#include <errno.h>
8#include <stdio.h>
9#include <stdint.h>
10#include <stdlib.h>
11#include <string.h>
12#include <u-boot/crc.h>
13#include <unistd.h>
14
15#include <linux/kconfig.h>
16
17#ifndef __ASSEMBLY__
18#define __ASSEMBLY__ /* Dirty trick to get only #defines */
19#endif
20#define __ASM_STUB_PROCESSOR_H__ /* don't include asm/processor. */
21#include <config.h>
22#undef __ASSEMBLY__
23
24#if defined(CONFIG_ENV_IS_IN_FLASH)
25# ifndef CONFIG_ENV_ADDR
26# define CONFIG_ENV_ADDR (CFG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
27# endif
28# ifndef CONFIG_ENV_OFFSET
29# define CONFIG_ENV_OFFSET (CONFIG_ENV_ADDR - CFG_SYS_FLASH_BASE)
30# endif
31# if !defined(CONFIG_ENV_ADDR_REDUND) && defined(CONFIG_ENV_OFFSET_REDUND)
32# define CONFIG_ENV_ADDR_REDUND (CFG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET_REDUND)
33# endif
34# ifndef CONFIG_ENV_SIZE
35# define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE
36# endif
37# if (CONFIG_ENV_ADDR >= CONFIG_SYS_MONITOR_BASE) && \
38 ((CONFIG_ENV_ADDR + CONFIG_ENV_SIZE) <= (CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN))
39# define ENV_IS_EMBEDDED
40# endif
41#endif /* CONFIG_ENV_IS_IN_FLASH */
42
43#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
44# define ENV_HEADER_SIZE (sizeof(uint32_t) + 1)
45#else
46# define ENV_HEADER_SIZE (sizeof(uint32_t))
47#endif
48
49#define ENV_SIZE (CONFIG_ENV_SIZE - ENV_HEADER_SIZE)
50
51#ifdef ENV_IS_EMBEDDED
52# include <env_internal.h>
53extern unsigned int env_size;
54extern env_t embedded_environment;
55#endif /* ENV_IS_EMBEDDED */
56
57extern uint32_t crc32(uint32_t, const unsigned char *, unsigned int);
58
59int main (int argc, char **argv)
60{
61#ifdef ENV_IS_EMBEDDED
62 unsigned char pad = 0x00;
63 uint32_t crc;
64 unsigned char *envptr = (unsigned char *)&embedded_environment,
65 *dataptr = envptr + ENV_HEADER_SIZE;
66 unsigned int datasize = ENV_SIZE;
67 unsigned int eoe;
68
69 if (argv[1] && !strncmp(argv[1], "--binary", 8)) {
70 int ipad = 0xff;
71 if (argv[1][8] == '=')
72 sscanf(argv[1] + 9, "%i", &ipad);
73 pad = ipad;
74 }
75
76 if (pad) {
77 /* find the end of env */
78 for (eoe = 0; eoe < datasize - 1; ++eoe)
79 if (!dataptr[eoe] && !dataptr[eoe+1]) {
80 eoe += 2;
81 break;
82 }
83 if (eoe < datasize - 1)
84 memset(dataptr + eoe, pad, datasize - eoe);
85 }
86
87 crc = crc32(0, dataptr, datasize);
88
89 /* Check if verbose mode is activated passing a parameter to the program */
90 if (argc > 1) {
91 if (!strncmp(argv[1], "--binary", 8)) {
92 int le = (argc > 2 ? !strcmp(argv[2], "le") : 1);
93 size_t i, start, end, step;
94 if (le) {
95 start = 0;
96 end = ENV_HEADER_SIZE;
97 step = 1;
98 } else {
99 start = ENV_HEADER_SIZE - 1;
100 end = -1;
101 step = -1;
102 }
103 for (i = start; i != end; i += step)
104 printf("%c", (crc & (0xFF << (i * 8))) >> (i * 8));
105 if (fwrite(dataptr, 1, datasize, stdout) != datasize)
106 fprintf(stderr, "fwrite() failed: %s\n", strerror(errno));
107 } else {
108 printf("CRC32 from offset %08X to %08X of environment = %08X\n",
109 (unsigned int) (dataptr - envptr),
110 (unsigned int) (dataptr - envptr) + datasize,
111 crc);
112 }
113 } else {
114 printf ("0x%08X\n", crc);
115 }
116#else
117 printf ("0\n");
118#endif
119 return EXIT_SUCCESS;
120}