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Merge branch 'master' of git://git.denx.de/u-boot-mpc85xx
[people/ms/u-boot.git] / tools / envcrc.c
1 /*
2 * (C) Copyright 2001
3 * Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
4 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21 * MA 02111-1307 USA
22 */
23
24 #include <errno.h>
25 #include <stdio.h>
26 #include <stdint.h>
27 #include <stdlib.h>
28 #include <string.h>
29 #include <unistd.h>
30
31 #ifndef __ASSEMBLY__
32 #define __ASSEMBLY__ /* Dirty trick to get only #defines */
33 #endif
34 #define __ASM_STUB_PROCESSOR_H__ /* don't include asm/processor. */
35 #include <config.h>
36 #undef __ASSEMBLY__
37
38 #if defined(CONFIG_ENV_IS_IN_FLASH)
39 # ifndef CONFIG_ENV_ADDR
40 # define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
41 # endif
42 # ifndef CONFIG_ENV_OFFSET
43 # define CONFIG_ENV_OFFSET (CONFIG_ENV_ADDR - CONFIG_SYS_FLASH_BASE)
44 # endif
45 # if !defined(CONFIG_ENV_ADDR_REDUND) && defined(CONFIG_ENV_OFFSET_REDUND)
46 # define CONFIG_ENV_ADDR_REDUND (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET_REDUND)
47 # endif
48 # ifndef CONFIG_ENV_SIZE
49 # define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE
50 # endif
51 # if defined(CONFIG_ENV_ADDR_REDUND) && !defined(CONFIG_ENV_SIZE_REDUND)
52 # define CONFIG_ENV_SIZE_REDUND CONFIG_ENV_SIZE
53 # endif
54 # if (CONFIG_ENV_ADDR >= CONFIG_SYS_MONITOR_BASE) && \
55 ((CONFIG_ENV_ADDR + CONFIG_ENV_SIZE) <= (CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN))
56 # define ENV_IS_EMBEDDED 1
57 # endif
58 # if defined(CONFIG_ENV_ADDR_REDUND) || defined(CONFIG_ENV_OFFSET_REDUND)
59 # define CONFIG_SYS_REDUNDAND_ENVIRONMENT 1
60 # endif
61 #endif /* CONFIG_ENV_IS_IN_FLASH */
62
63 #ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
64 # define ENV_HEADER_SIZE (sizeof(uint32_t) + 1)
65 #else
66 # define ENV_HEADER_SIZE (sizeof(uint32_t))
67 #endif
68
69 #define ENV_SIZE (CONFIG_ENV_SIZE - ENV_HEADER_SIZE)
70
71
72 extern uint32_t crc32 (uint32_t, const unsigned char *, unsigned int);
73
74 #ifdef ENV_IS_EMBEDDED
75 extern unsigned int env_size;
76 extern unsigned char environment;
77 #endif /* ENV_IS_EMBEDDED */
78
79 int main (int argc, char **argv)
80 {
81 #ifdef ENV_IS_EMBEDDED
82 unsigned char pad = 0x00;
83 uint32_t crc;
84 unsigned char *envptr = &environment,
85 *dataptr = envptr + ENV_HEADER_SIZE;
86 unsigned int datasize = ENV_SIZE;
87 unsigned int eoe;
88
89 if (argv[1] && !strncmp(argv[1], "--binary", 8)) {
90 int ipad = 0xff;
91 if (argv[1][8] == '=')
92 sscanf(argv[1] + 9, "%i", &ipad);
93 pad = ipad;
94 }
95
96 if (pad) {
97 /* find the end of env */
98 for (eoe = 0; eoe < datasize - 1; ++eoe)
99 if (!dataptr[eoe] && !dataptr[eoe+1]) {
100 eoe += 2;
101 break;
102 }
103 if (eoe < datasize - 1)
104 memset(dataptr + eoe, pad, datasize - eoe);
105 }
106
107 crc = crc32 (0, dataptr, datasize);
108
109 /* Check if verbose mode is activated passing a parameter to the program */
110 if (argc > 1) {
111 if (!strncmp(argv[1], "--binary", 8)) {
112 int le = (argc > 2 ? !strcmp(argv[2], "le") : 1);
113 size_t i, start, end, step;
114 if (le) {
115 start = 0;
116 end = ENV_HEADER_SIZE;
117 step = 1;
118 } else {
119 start = ENV_HEADER_SIZE - 1;
120 end = -1;
121 step = -1;
122 }
123 for (i = start; i != end; i += step)
124 printf("%c", (crc & (0xFF << (i * 8))) >> (i * 8));
125 if (fwrite(dataptr, 1, datasize, stdout) != datasize)
126 fprintf(stderr, "fwrite() failed: %s\n", strerror(errno));
127 } else {
128 printf("CRC32 from offset %08X to %08X of environment = %08X\n",
129 (unsigned int) (dataptr - envptr),
130 (unsigned int) (dataptr - envptr) + datasize,
131 crc);
132 }
133 } else {
134 printf ("0x%08X\n", crc);
135 }
136 #else
137 printf ("0\n");
138 #endif
139 return EXIT_SUCCESS;
140 }