2 * (C) Copyright 2002-2008
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * SPDX-License-Identifier: GPL-2.0+
11 /* Pull in the current config to define the default environment */
12 #include <linux/kconfig.h>
15 #define __ASSEMBLY__ /* get only #defines from config.h */
23 * To build the utility with the static configuration
24 * comment out the next line.
25 * See included "fw_env.config" sample file
26 * for notes on configuration.
28 #define CONFIG_FILE "/etc/fw_env.config"
31 #define HAVE_REDUND /* For systems with 2 env sectors */
32 #define DEVICE1_NAME "/dev/mtd1"
33 #define DEVICE2_NAME "/dev/mtd2"
34 #define DEVICE1_OFFSET 0x0000
35 #define ENV1_SIZE 0x4000
36 #define DEVICE1_ESIZE 0x4000
37 #define DEVICE1_ENVSECTORS 2
38 #define DEVICE2_OFFSET 0x0000
39 #define ENV2_SIZE 0x4000
40 #define DEVICE2_ESIZE 0x4000
41 #define DEVICE2_ENVSECTORS 2
44 #ifndef CONFIG_BAUDRATE
45 #define CONFIG_BAUDRATE 115200
48 #ifndef CONFIG_BOOTDELAY
49 #define CONFIG_BOOTDELAY 5 /* autoboot after 5 seconds */
52 #ifndef CONFIG_BOOTCOMMAND
53 #define CONFIG_BOOTCOMMAND \
55 "setenv bootargs root=/dev/nfs nfsroot=${serverip}:${rootpath} " \
56 "ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}:${hostname}::off; " \
64 int aes_flag; /* Is AES encryption used? */
65 uint8_t aes_key[AES_KEY_LENGTH];
69 int parse_aes_key(char *key, uint8_t *bin_key);
72 * fw_printenv() - print one or several environment variables
74 * @argc: number of variables names to be printed, prints all if 0
75 * @argv: array of variable names to be printed, if argc != 0
76 * @value_only: do not repeat the variable name, print the bare value,
77 * only one variable allowed with this option, argc must be 1
78 * @opts: encryption key, configuration file, defaults are used if NULL
81 * Uses fw_env_open, fw_getenv
84 * 0 on success, -1 on failure (modifies errno)
86 int fw_printenv(int argc, char *argv[], int value_only, struct env_opts *opts);
89 * fw_setenv() - adds or removes one variable to the environment
91 * @argc: number of strings in argv, argv[0] is variable name,
92 * argc==1 means erase variable, argc > 1 means add a variable
93 * @argv: argv[0] is variable name, argv[1..argc-1] are concatenated separated
94 * by single blank and set as the new value of the variable
95 * @opts: how to retrieve environment from flash, defaults are used if NULL
98 * Uses fw_env_open, fw_env_write, fw_env_close
101 * 0 on success, -1 on failure (modifies errno)
104 * EROFS - some variables ("ethaddr", "serial#") cannot be modified
106 int fw_setenv(int argc, char *argv[], struct env_opts *opts);
109 * fw_parse_script() - adds or removes multiple variables with a batch script
111 * @fname: batch script file name
112 * @opts: encryption key, configuration file, defaults are used if NULL
115 * Uses fw_env_open, fw_env_write, fw_env_close
118 * 0 success, -1 on failure (modifies errno)
122 * key [ [space]+ value]
124 * lines starting with '#' treated as comment
126 * A variable without value will be deleted. Any number of spaces are allowed
127 * between key and value. The value starts with the first non-space character
128 * and ends with newline. No comments allowed on these lines. Spaces inside
129 * the value are preserved verbatim.
137 * foo spaces are copied verbatim
139 * # delete variable bar
143 int fw_parse_script(char *fname, struct env_opts *opts);
147 * fw_env_open() - read enviroment from flash into RAM cache
149 * @opts: encryption key, configuration file, defaults are used if NULL
152 * 0 on success, -1 on failure (modifies errno)
154 int fw_env_open(struct env_opts *opts);
157 * fw_getenv() - lookup variable in the RAM cache
159 * @name: variable to be searched
161 * pointer to start of value, NULL if not found
163 char *fw_getenv(char *name);
166 * fw_env_write() - modify a variable held in the RAM cache
169 * @value: delete variable if NULL, otherwise create or overwrite the variable
171 * This is called in sequence to update the environment in RAM without updating
172 * the copy in flash after each set
175 * 0 on success, -1 on failure (modifies errno)
178 * EROFS - some variables ("ethaddr", "serial#") cannot be modified
180 int fw_env_write(char *name, char *value);
183 * fw_env_close - write the environment from RAM cache back to flash
185 * @opts: encryption key, configuration file, defaults are used if NULL
188 * 0 on success, -1 on failure (modifies errno)
190 int fw_env_close(struct env_opts *opts);
192 unsigned long crc32(unsigned long, const unsigned char *, unsigned);