1 /* 2 * (C) Copyright 2000-2009 3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 /* 9 * Definitions for Command Processor 10 */ 11 #ifndef __COMMAND_H 12 #define __COMMAND_H 13 14 #include <linker_lists.h> 15 16 #ifndef NULL 17 #define NULL 0 18 #endif 19 20 /* Default to a width of 8 characters for help message command width */ 21 #ifndef CONFIG_SYS_HELP_CMD_WIDTH 22 #define CONFIG_SYS_HELP_CMD_WIDTH 8 23 #endif 24 25 #ifndef __ASSEMBLY__ 26 /* 27 * Monitor Command Table 28 */ 29 30 struct cmd_tbl_s { 31 char *name; /* Command Name */ 32 int maxargs; /* maximum number of arguments */ 33 int repeatable; /* autorepeat allowed? */ 34 /* Implementation function */ 35 int (*cmd)(struct cmd_tbl_s *, int, int, char * const []); 36 char *usage; /* Usage message (short) */ 37 #ifdef CONFIG_SYS_LONGHELP 38 char *help; /* Help message (long) */ 39 #endif 40 #ifdef CONFIG_AUTO_COMPLETE 41 /* do auto completion on the arguments */ 42 int (*complete)(int argc, char * const argv[], char last_char, int maxv, char *cmdv[]); 43 #endif 44 }; 45 46 typedef struct cmd_tbl_s cmd_tbl_t; 47 48 49 #if defined(CONFIG_CMD_RUN) 50 extern int do_run(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); 51 #endif 52 53 /* common/command.c */ 54 int _do_help (cmd_tbl_t *cmd_start, int cmd_items, cmd_tbl_t * cmdtp, int 55 flag, int argc, char * const argv[]); 56 cmd_tbl_t *find_cmd(const char *cmd); 57 cmd_tbl_t *find_cmd_tbl (const char *cmd, cmd_tbl_t *table, int table_len); 58 59 extern int cmd_usage(const cmd_tbl_t *cmdtp); 60 61 #ifdef CONFIG_AUTO_COMPLETE 62 extern int var_complete(int argc, char * const argv[], char last_char, int maxv, char *cmdv[]); 63 extern int cmd_auto_complete(const char *const prompt, char *buf, int *np, int *colp); 64 #endif 65 66 /** 67 * cmd_process_error() - report and process a possible error 68 * 69 * @cmdtp: Command which caused the error 70 * @err: Error code (0 if none, -ve for error, like -EIO) 71 * @return 0 if there is not error, 1 (CMD_RET_FAILURE) if an error is found 72 */ 73 int cmd_process_error(cmd_tbl_t *cmdtp, int err); 74 75 /* 76 * Monitor Command 77 * 78 * All commands use a common argument format: 79 * 80 * void function (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); 81 */ 82 83 #if defined(CONFIG_CMD_MEMORY) || \ 84 defined(CONFIG_CMD_I2C) || \ 85 defined(CONFIG_CMD_ITEST) || \ 86 defined(CONFIG_CMD_PCI) 87 #define CMD_DATA_SIZE 88 extern int cmd_get_data_size(char* arg, int default_size); 89 #endif 90 91 #ifdef CONFIG_CMD_BOOTD 92 extern int do_bootd(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); 93 #endif 94 #ifdef CONFIG_CMD_BOOTM 95 extern int do_bootm(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); 96 extern int bootm_maybe_autostart(cmd_tbl_t *cmdtp, const char *cmd); 97 #else 98 static inline int bootm_maybe_autostart(cmd_tbl_t *cmdtp, const char *cmd) 99 { 100 return 0; 101 } 102 #endif 103 104 extern int do_bootz(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); 105 106 extern int do_booti(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); 107 108 extern int common_diskboot(cmd_tbl_t *cmdtp, const char *intf, int argc, 109 char *const argv[]); 110 111 extern int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); 112 extern int do_poweroff(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); 113 114 extern unsigned long do_go_exec(ulong (*entry)(int, char * const []), int argc, 115 char * const argv[]); 116 /* 117 * Error codes that commands return to cmd_process(). We use the standard 0 118 * and 1 for success and failure, but add one more case - failure with a 119 * request to call cmd_usage(). But the cmd_process() function handles 120 * CMD_RET_USAGE itself and after calling cmd_usage() it will return 1. 121 * This is just a convenience for commands to avoid them having to call 122 * cmd_usage() all over the place. 123 */ 124 enum command_ret_t { 125 CMD_RET_SUCCESS, /* 0 = Success */ 126 CMD_RET_FAILURE, /* 1 = Failure */ 127 CMD_RET_USAGE = -1, /* Failure, please report 'usage' error */ 128 }; 129 130 /** 131 * Process a command with arguments. We look up the command and execute it 132 * if valid. Otherwise we print a usage message. 133 * 134 * @param flag Some flags normally 0 (see CMD_FLAG_.. above) 135 * @param argc Number of arguments (arg 0 must be the command text) 136 * @param argv Arguments 137 * @param repeatable This function sets this to 0 if the command is not 138 * repeatable. If the command is repeatable, the value 139 * is left unchanged. 140 * @param ticks If ticks is not null, this function set it to the 141 * number of ticks the command took to complete. 142 * @return 0 if the command succeeded, 1 if it failed 143 */ 144 int cmd_process(int flag, int argc, char * const argv[], 145 int *repeatable, unsigned long *ticks); 146 147 void fixup_cmdtable(cmd_tbl_t *cmdtp, int size); 148 149 /** 150 * board_run_command() - Fallback function to execute a command 151 * 152 * When no command line features are enabled in U-Boot, this function is 153 * called to execute a command. Typically the function can look at the 154 * command and perform a few very specific tasks, such as booting the 155 * system in a particular way. 156 * 157 * This function is only used when CONFIG_CMDLINE is not enabled. 158 * 159 * In normal situations this function should not return, since U-Boot will 160 * simply hang. 161 * 162 * @cmdline: Command line string to execute 163 * @return 0 if OK, 1 for error 164 */ 165 int board_run_command(const char *cmdline); 166 #endif /* __ASSEMBLY__ */ 167 168 /* 169 * Command Flags: 170 */ 171 #define CMD_FLAG_REPEAT 0x0001 /* repeat last command */ 172 #define CMD_FLAG_BOOTD 0x0002 /* command is from bootd */ 173 #define CMD_FLAG_ENV 0x0004 /* command is from the environment */ 174 175 #ifdef CONFIG_AUTO_COMPLETE 176 # define _CMD_COMPLETE(x) x, 177 #else 178 # define _CMD_COMPLETE(x) 179 #endif 180 #ifdef CONFIG_SYS_LONGHELP 181 # define _CMD_HELP(x) x, 182 #else 183 # define _CMD_HELP(x) 184 #endif 185 186 #ifdef CONFIG_CMDLINE 187 #define U_BOOT_CMD_MKENT_COMPLETE(_name, _maxargs, _rep, _cmd, \ 188 _usage, _help, _comp) \ 189 { #_name, _maxargs, _rep, _cmd, _usage, \ 190 _CMD_HELP(_help) _CMD_COMPLETE(_comp) } 191 192 #define U_BOOT_CMD_COMPLETE(_name, _maxargs, _rep, _cmd, _usage, _help, _comp) \ 193 ll_entry_declare(cmd_tbl_t, _name, cmd) = \ 194 U_BOOT_CMD_MKENT_COMPLETE(_name, _maxargs, _rep, _cmd, \ 195 _usage, _help, _comp); 196 197 #else 198 #define U_BOOT_SUBCMD_START(name) static cmd_tbl_t name[] = {}; 199 #define U_BOOT_SUBCMD_END 200 201 #define _CMD_REMOVE(_name, _cmd) \ 202 int __remove_ ## _name(void) \ 203 { \ 204 if (0) \ 205 _cmd(NULL, 0, 0, NULL); \ 206 return 0; \ 207 } 208 #define U_BOOT_CMD_MKENT_COMPLETE(_name, _maxargs, _rep, _cmd, _usage, \ 209 _help, _comp) \ 210 { #_name, _maxargs, _rep, 0 ? _cmd : NULL, _usage, \ 211 _CMD_HELP(_help) _CMD_COMPLETE(_comp) } 212 213 #define U_BOOT_CMD_COMPLETE(_name, _maxargs, _rep, _cmd, _usage, _help, \ 214 _comp) \ 215 _CMD_REMOVE(sub_ ## _name, _cmd) 216 217 #endif /* CONFIG_CMDLINE */ 218 219 #define U_BOOT_CMD(_name, _maxargs, _rep, _cmd, _usage, _help) \ 220 U_BOOT_CMD_COMPLETE(_name, _maxargs, _rep, _cmd, _usage, _help, NULL) 221 222 #define U_BOOT_CMD_MKENT(_name, _maxargs, _rep, _cmd, _usage, _help) \ 223 U_BOOT_CMD_MKENT_COMPLETE(_name, _maxargs, _rep, _cmd, \ 224 _usage, _help, NULL) 225 226 #endif /* __COMMAND_H */ 227