include/command.h

   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 /*
 115  * Error codes that commands return to cmd_process(). We use the standard 0
 116  * and 1 for success and failure, but add one more case - failure with a
 117  * request to call cmd_usage(). But the cmd_process() function handles
 118  * CMD_RET_USAGE itself and after calling cmd_usage() it will return 1.
 119  * This is just a convenience for commands to avoid them having to call
 120  * cmd_usage() all over the place.
 121  */
 122 enum command_ret_t {
 123         CMD_RET_SUCCESS,        /* 0 = Success */
 124         CMD_RET_FAILURE,        /* 1 = Failure */
 125         CMD_RET_USAGE = -1,     /* Failure, please report 'usage' error */
 126 };
 127
 128 /**
 129  * Process a command with arguments. We look up the command and execute it
 130  * if valid. Otherwise we print a usage message.
 131  *
 132  * @param flag          Some flags normally 0 (see CMD_FLAG_.. above)
 133  * @param argc          Number of arguments (arg 0 must be the command text)
 134  * @param argv          Arguments
 135  * @param repeatable    This function sets this to 0 if the command is not
 136  *                      repeatable. If the command is repeatable, the value
 137  *                      is left unchanged.
 138  * @param ticks         If ticks is not null, this function set it to the
 139  *                      number of ticks the command took to complete.
 140  * @return 0 if the command succeeded, 1 if it failed
 141  */
 142 int cmd_process(int flag, int argc, char * const argv[],
 143                                int *repeatable, unsigned long *ticks);
 144
 145 void fixup_cmdtable(cmd_tbl_t *cmdtp, int size);
 146
 147 /**
 148  * board_run_command() - Fallback function to execute a command
 149  *
 150  * When no command line features are enabled in U-Boot, this function is
 151  * called to execute a command. Typically the function can look at the
 152  * command and perform a few very specific tasks, such as booting the
 153  * system in a particular way.
 154  *
 155  * This function is only used when CONFIG_CMDLINE is not enabled.
 156  *
 157  * In normal situations this function should not return, since U-Boot will
 158  * simply hang.
 159  *
 160  * @cmdline:    Command line string to execute
 161  * @return 0 if OK, 1 for error
 162  */
 163 int board_run_command(const char *cmdline);
 164 #endif  /* __ASSEMBLY__ */
 165
 166 /*
 167  * Command Flags:
 168  */
 169 #define CMD_FLAG_REPEAT         0x0001  /* repeat last command          */
 170 #define CMD_FLAG_BOOTD          0x0002  /* command is from bootd        */
 171 #define CMD_FLAG_ENV            0x0004  /* command is from the environment */
 172
 173 #ifdef CONFIG_AUTO_COMPLETE
 174 # define _CMD_COMPLETE(x) x,
 175 #else
 176 # define _CMD_COMPLETE(x)
 177 #endif
 178 #ifdef CONFIG_SYS_LONGHELP
 179 # define _CMD_HELP(x) x,
 180 #else
 181 # define _CMD_HELP(x)
 182 #endif
 183
 184 #ifdef CONFIG_CMDLINE
 185 #define U_BOOT_CMD_MKENT_COMPLETE(_name, _maxargs, _rep, _cmd,          \
 186                                 _usage, _help, _comp)                   \
 187                 { #_name, _maxargs, _rep, _cmd, _usage,                 \
 188                         _CMD_HELP(_help) _CMD_COMPLETE(_comp) }
 189
 190 #define U_BOOT_CMD_COMPLETE(_name, _maxargs, _rep, _cmd, _usage, _help, _comp) \
 191         ll_entry_declare(cmd_tbl_t, _name, cmd) =                       \
 192                 U_BOOT_CMD_MKENT_COMPLETE(_name, _maxargs, _rep, _cmd,  \
 193                                                 _usage, _help, _comp);
 194
 195 #else
 196 #define U_BOOT_SUBCMD_START(name)       static cmd_tbl_t name[] = {};
 197 #define U_BOOT_SUBCMD_END
 198
 199 #define _CMD_REMOVE(_name, _cmd)                                        \
 200         int __remove_ ## _name(void)                                    \
 201         {                                                               \
 202                 if (0)                                                  \
 203                         _cmd(NULL, 0, 0, NULL);                         \
 204                 return 0;                                               \
 205         }
 206 #define U_BOOT_CMD_MKENT_COMPLETE(_name, _maxargs, _rep, _cmd, _usage,  \
 207                                   _help, _comp)                         \
 208                 { #_name, _maxargs, _rep, 0 ? _cmd : NULL, _usage,      \
 209                         _CMD_HELP(_help) _CMD_COMPLETE(_comp) }
 210
 211 #define U_BOOT_CMD_COMPLETE(_name, _maxargs, _rep, _cmd, _usage, _help, \
 212                             _comp)                              \
 213         _CMD_REMOVE(sub_ ## _name, _cmd)
 214
 215 #endif /* CONFIG_CMDLINE */
 216
 217 #define U_BOOT_CMD(_name, _maxargs, _rep, _cmd, _usage, _help)          \
 218         U_BOOT_CMD_COMPLETE(_name, _maxargs, _rep, _cmd, _usage, _help, NULL)
 219
 220 #define U_BOOT_CMD_MKENT(_name, _maxargs, _rep, _cmd, _usage, _help)    \
 221         U_BOOT_CMD_MKENT_COMPLETE(_name, _maxargs, _rep, _cmd,          \
 222                                         _usage, _help, NULL)
 223
 224 #endif  /* __COMMAND_H */