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_ENV_REDUNDANT
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>
53 extern unsigned int env_size;
54 extern env_t embedded_environment;
55 #endif /* ENV_IS_EMBEDDED */
56
57 extern uint32_t crc32(uint32_t, const unsigned char *, unsigned int);
58
main(int argc,char ** argv)59 int 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 }
121