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 (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
27 # endif
28 # ifndef CONFIG_ENV_OFFSET
29 # define CONFIG_ENV_OFFSET (CONFIG_ENV_ADDR - CONFIG_SYS_FLASH_BASE)
30 # endif
31 # if !defined(CONFIG_ENV_ADDR_REDUND) && defined(CONFIG_ENV_OFFSET_REDUND)
32 # define CONFIG_ENV_ADDR_REDUND (CONFIG_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 #if defined(ENV_IS_EMBEDDED) && !defined(CONFIG_BUILD_ENVCRC)
44 # define CONFIG_BUILD_ENVCRC
45 #endif
46
47 #ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
48 # define ENV_HEADER_SIZE (sizeof(uint32_t) + 1)
49 #else
50 # define ENV_HEADER_SIZE (sizeof(uint32_t))
51 #endif
52
53 #define ENV_SIZE (CONFIG_ENV_SIZE - ENV_HEADER_SIZE)
54
55
56 #ifdef CONFIG_BUILD_ENVCRC
57 # include <env_internal.h>
58 extern unsigned int env_size;
59 extern env_t embedded_environment;
60 #endif /* CONFIG_BUILD_ENVCRC */
61
62 extern uint32_t crc32(uint32_t, const unsigned char *, unsigned int);
63
main(int argc,char ** argv)64 int main (int argc, char **argv)
65 {
66 #ifdef CONFIG_BUILD_ENVCRC
67 unsigned char pad = 0x00;
68 uint32_t crc;
69 unsigned char *envptr = (unsigned char *)&embedded_environment,
70 *dataptr = envptr + ENV_HEADER_SIZE;
71 unsigned int datasize = ENV_SIZE;
72 unsigned int eoe;
73
74 if (argv[1] && !strncmp(argv[1], "--binary", 8)) {
75 int ipad = 0xff;
76 if (argv[1][8] == '=')
77 sscanf(argv[1] + 9, "%i", &ipad);
78 pad = ipad;
79 }
80
81 if (pad) {
82 /* find the end of env */
83 for (eoe = 0; eoe < datasize - 1; ++eoe)
84 if (!dataptr[eoe] && !dataptr[eoe+1]) {
85 eoe += 2;
86 break;
87 }
88 if (eoe < datasize - 1)
89 memset(dataptr + eoe, pad, datasize - eoe);
90 }
91
92 crc = crc32(0, dataptr, datasize);
93
94 /* Check if verbose mode is activated passing a parameter to the program */
95 if (argc > 1) {
96 if (!strncmp(argv[1], "--binary", 8)) {
97 int le = (argc > 2 ? !strcmp(argv[2], "le") : 1);
98 size_t i, start, end, step;
99 if (le) {
100 start = 0;
101 end = ENV_HEADER_SIZE;
102 step = 1;
103 } else {
104 start = ENV_HEADER_SIZE - 1;
105 end = -1;
106 step = -1;
107 }
108 for (i = start; i != end; i += step)
109 printf("%c", (crc & (0xFF << (i * 8))) >> (i * 8));
110 if (fwrite(dataptr, 1, datasize, stdout) != datasize)
111 fprintf(stderr, "fwrite() failed: %s\n", strerror(errno));
112 } else {
113 printf("CRC32 from offset %08X to %08X of environment = %08X\n",
114 (unsigned int) (dataptr - envptr),
115 (unsigned int) (dataptr - envptr) + datasize,
116 crc);
117 }
118 } else {
119 printf ("0x%08X\n", crc);
120 }
121 #else
122 printf ("0\n");
123 #endif
124 return EXIT_SUCCESS;
125 }
126