3 * Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
5 * SPDX-License-Identifier: GPL-2.0+
15 #include <linux/kconfig.h>
18 #define __ASSEMBLY__ /* Dirty trick to get only #defines */
20 #define __ASM_STUB_PROCESSOR_H__ /* don't include asm/processor. */
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)
28 # ifndef CONFIG_ENV_OFFSET
29 # define CONFIG_ENV_OFFSET (CONFIG_ENV_ADDR - CONFIG_SYS_FLASH_BASE)
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)
34 # ifndef CONFIG_ENV_SIZE
35 # define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE
37 # if defined(CONFIG_ENV_ADDR_REDUND) && !defined(CONFIG_ENV_SIZE_REDUND)
38 # define CONFIG_ENV_SIZE_REDUND CONFIG_ENV_SIZE
40 # if (CONFIG_ENV_ADDR >= CONFIG_SYS_MONITOR_BASE) && \
41 ((CONFIG_ENV_ADDR + CONFIG_ENV_SIZE) <= (CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN))
42 # define ENV_IS_EMBEDDED
44 # if defined(CONFIG_ENV_ADDR_REDUND) || defined(CONFIG_ENV_OFFSET_REDUND)
45 # define CONFIG_SYS_REDUNDAND_ENVIRONMENT
47 #endif /* CONFIG_ENV_IS_IN_FLASH */
49 #if defined(ENV_IS_EMBEDDED) && !defined(CONFIG_BUILD_ENVCRC)
50 # define CONFIG_BUILD_ENVCRC
53 #ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
54 # define ENV_HEADER_SIZE (sizeof(uint32_t) + 1)
56 # define ENV_HEADER_SIZE (sizeof(uint32_t))
59 #define ENV_SIZE (CONFIG_ENV_SIZE - ENV_HEADER_SIZE)
62 #ifdef CONFIG_BUILD_ENVCRC
63 # include <environment.h>
64 extern unsigned int env_size;
65 extern env_t environment;
66 #endif /* CONFIG_BUILD_ENVCRC */
68 extern uint32_t crc32 (uint32_t, const unsigned char *, unsigned int);
70 int main (int argc, char **argv)
72 #ifdef CONFIG_BUILD_ENVCRC
73 unsigned char pad = 0x00;
75 unsigned char *envptr = (unsigned char *)&environment,
76 *dataptr = envptr + ENV_HEADER_SIZE;
77 unsigned int datasize = ENV_SIZE;
80 if (argv[1] && !strncmp(argv[1], "--binary", 8)) {
82 if (argv[1][8] == '=')
83 sscanf(argv[1] + 9, "%i", &ipad);
88 /* find the end of env */
89 for (eoe = 0; eoe < datasize - 1; ++eoe)
90 if (!dataptr[eoe] && !dataptr[eoe+1]) {
94 if (eoe < datasize - 1)
95 memset(dataptr + eoe, pad, datasize - eoe);
98 crc = crc32 (0, dataptr, datasize);
100 /* Check if verbose mode is activated passing a parameter to the program */
102 if (!strncmp(argv[1], "--binary", 8)) {
103 int le = (argc > 2 ? !strcmp(argv[2], "le") : 1);
104 size_t i, start, end, step;
107 end = ENV_HEADER_SIZE;
110 start = ENV_HEADER_SIZE - 1;
114 for (i = start; i != end; i += step)
115 printf("%c", (crc & (0xFF << (i * 8))) >> (i * 8));
116 if (fwrite(dataptr, 1, datasize, stdout) != datasize)
117 fprintf(stderr, "fwrite() failed: %s\n", strerror(errno));
119 printf("CRC32 from offset %08X to %08X of environment = %08X\n",
120 (unsigned int) (dataptr - envptr),
121 (unsigned int) (dataptr - envptr) + datasize,
125 printf ("0x%08X\n", crc);