57 	ulong env_size;			/* environment size */
59 	ulong env_sectors;		/* number of environment sectors */
102 struct environment {  struct
110 static struct environment environment = {  argument
169  * Search the environment for a variable.
176 	for (env = environment.data; *env; env = nxt + 1) {  in fw_getenv()
180 			if (nxt >= &environment.data[ENV_SIZE]) {  in fw_getenv()
182 					"environment not terminated\n");  in fw_getenv()
195  * Search the default environment for a variable.
208 					"default environment not terminated\n");  in fw_getdefenv()
250  * environment variables
270 		for (env = environment.data; *env; env = nxt + 1) {  in fw_printenv()
272 				if (nxt >= &environment.data[ENV_SIZE]) {  in fw_printenv()
274 						"environment not terminated\n");  in fw_printenv()
317 		ret = env_aes_cbc_crypt(environment.data, 1,  in fw_env_flush()
329 	*environment.crc = crc32(0, (uint8_t *) environment.data, ENV_SIZE);  in fw_env_flush()
331 	/* write environment back to flash */  in fw_env_flush()
343  * Set/Clear a single variable in the environment.
344  * This is called in sequence to update the environment
357 	for (nxt = env = environment.data; *env; env = nxt + 1) {  in fw_env_write()
359 			if (nxt >= &environment.data[ENV_SIZE]) {  in fw_env_write()
361 					"environment not terminated\n");  in fw_env_write()
433 	for (env = environment.data; *env || *(env + 1); ++env);  in fw_env_write()
434 	if (env > environment.data)  in fw_env_write()
438 	 * "name" + "=" + "val" +"\0\0"  > CUR_ENVSIZE - (env-environment)  in fw_env_write()
444 	if (len > (&environment.data[ENV_SIZE] - env)) {  in fw_env_write()
446 			"Error: environment overflow, \"%s\" deleted\n",  in fw_env_write()
464  * Deletes or sets environment variables. Returns -1 and sets errno error codes:
491 		fprintf(stderr, "Error: environment not initialized\n");  in fw_env_set()
567 		fprintf(stderr, "Error: environment not initialized\n");  in fw_parse_script()
638 		 * try to save the environment and returns an error  in fw_parse_script()
669 	/* environment is block aligned */  in environment_end()
783  * Write count bytes from begin of environment, but stay within
809 	 * For mtd devices only offset and size of the environment do matter  in flash_write_buf()
841 	 * area to be erased, replace the environment image, write the whole  in flash_write_buf()
870 		/* Overwrite the old environment */  in flash_write_buf()
979 /* Encrypt or decrypt the environment before writing or reading it. */
1005 	switch (environment.flag_scheme) {  in flash_write()
1009 		(*environment.flags)++;  in flash_write()
1012 		*environment.flags = active_flag;  in flash_write()
1016 			 environment.flag_scheme);  in flash_write()
1021 	fprintf(stderr, "Writing new environment at 0x%llx on %s\n",  in flash_write()
1025 	rc = flash_write_buf(dev_target, fd_target, environment.image,  in flash_write()
1030 	if (environment.flag_scheme == FLAG_BOOLEAN) {  in flash_write()
1036 			"Setting obsolete flag in environment at 0x%llx on %s\n",  in flash_write()
1049 	rc = flash_read_buf(dev_current, fd, environment.image, CUR_ENVSIZE,  in flash_read()
1156 			"Not enough memory for environment (%ld bytes)\n",  in fw_env_open()
1162 	/* read environment from FLASH to local buffer */  in fw_env_open()
1163 	environment.image = addr0;  in fw_env_open()
1167 		environment.crc		= &redundant->crc;  in fw_env_open()
1168 		environment.flags	= &redundant->flags;  in fw_env_open()
1169 		environment.data	= redundant->data;  in fw_env_open()
1172 		environment.crc		= &single->crc;  in fw_env_open()
1173 		environment.flags	= NULL;  in fw_env_open()
1174 		environment.data	= single->data;  in fw_env_open()
1183 	crc0 = crc32 (0, (uint8_t *) environment.data, ENV_SIZE);  in fw_env_open()
1186 		ret = env_aes_cbc_crypt(environment.data, 0,  in fw_env_open()
1192 	crc0_ok = (crc0 == *environment.crc);  in fw_env_open()
1196 				"Warning: Bad CRC, using default environment\n");  in fw_env_open()
1197 			memcpy(environment.data, default_environment, sizeof default_environment);  in fw_env_open()
1200 		flag0 = *environment.flags;  in fw_env_open()
1206 				"Not enough memory for environment (%ld bytes)\n",  in fw_env_open()
1214 		 * have to set environment.image for flash_read(), careful -  in fw_env_open()
1215 		 * other pointers in environment still point inside addr0  in fw_env_open()
1217 		environment.image = addr1;  in fw_env_open()
1226 			environment.flag_scheme = FLAG_BOOLEAN;  in fw_env_open()
1229 			environment.flag_scheme = FLAG_INCREMENTAL;  in fw_env_open()
1232 			environment.flag_scheme = FLAG_BOOLEAN;  in fw_env_open()
1235 			environment.flag_scheme = FLAG_INCREMENTAL;  in fw_env_open()
1238 			environment.flag_scheme = FLAG_INCREMENTAL;  in fw_env_open()
1263 				"Warning: Bad CRC, using default environment\n");  in fw_env_open()
1264 			memcpy (environment.data, default_environment,  in fw_env_open()
1268 			switch (environment.flag_scheme) {  in fw_env_open()
1297 					 environment.flag_scheme);  in fw_env_open()
1308 			environment.image	= addr1;  in fw_env_open()
1309 			environment.crc		= &redundant->crc;  in fw_env_open()
1310 			environment.flags	= &redundant->flags;  in fw_env_open()
1311 			environment.data	= redundant->data;  in fw_env_open()
1314 			environment.image	= addr0;  in fw_env_open()
1335  * Simply free allocated buffer with environment
1339 	if (environment.image)  in fw_env_close()
1340 		free(environment.image);  in fw_env_close()
1342 	environment.image = NULL;  in fw_env_close()
1415 		/* Assume enough sectors to cover the environment */  in check_device_config()
1419 		fprintf(stderr, "Environment does not start on (erase) block boundary\n");  in check_device_config()
1425 		fprintf(stderr, "Environment does not fit into available sectors\n");  in check_device_config()