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 <config.h>
  15 #include <linker_lists.h>
  16
  17 #ifndef NULL
  18 #define NULL    0
  19 #endif
  20
  21 /* Default to a width of 8 characters for help message command width */
  22 #ifndef CONFIG_SYS_HELP_CMD_WIDTH
  23 #define CONFIG_SYS_HELP_CMD_WIDTH       8
  24 #endif
  25
  26 #ifndef __ASSEMBLY__
  27 /*
  28  * Monitor Command Table
  29  */
  30
  31 struct cmd_tbl_s {
  32         char            *name;          /* Command Name                 */
  33         int             maxargs;        /* maximum number of arguments  */
  34         int             repeatable;     /* autorepeat allowed?          */
  35                                         /* Implementation function      */
  36         int             (*cmd)(struct cmd_tbl_s *, int, int, char * const []);
  37         char            *usage;         /* Usage message        (short) */
  38 #ifdef  CONFIG_SYS_LONGHELP
  39         char            *help;          /* Help  message        (long)  */
  40 #endif
  41 #ifdef CONFIG_AUTO_COMPLETE
  42         /* do auto completion on the arguments */
  43         int             (*complete)(int argc, char * const argv[], char last_char, int maxv, char *cmdv[]);
  44 #endif
  45 };
  46
  47 typedef struct cmd_tbl_s        cmd_tbl_t;
  48
  49
  50 #if defined(CONFIG_CMD_RUN)
  51 extern int do_run(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
  52 #endif
  53
  54 /* common/command.c */
  55 int _do_help (cmd_tbl_t *cmd_start, int cmd_items, cmd_tbl_t * cmdtp, int
  56               flag, int argc, char * const argv[]);
  57 cmd_tbl_t *find_cmd(const char *cmd);
  58 cmd_tbl_t *find_cmd_tbl (const char *cmd, cmd_tbl_t *table, int table_len);
  59
  60 extern int cmd_usage(const cmd_tbl_t *cmdtp);
  61
  62 #ifdef CONFIG_AUTO_COMPLETE
  63 extern int var_complete(int argc, char * const argv[], char last_char, int maxv, char *cmdv[]);
  64 extern int cmd_auto_complete(const char *const prompt, char *buf, int *np, int *colp);
  65 #endif
  66
  67 /**
  68  * cmd_process_error() - report and process a possible error
  69  *
  70  * @cmdtp: Command which caused the error
  71  * @err: Error code (0 if none, -ve for error, like -EIO)
  72  * @return 0 if there is not error, 1 (CMD_RET_FAILURE) if an error is found
  73  */
  74 int cmd_process_error(cmd_tbl_t *cmdtp, int err);
  75
  76 /*
  77  * Monitor Command
  78  *
  79  * All commands use a common argument format:
  80  *
  81  * void function (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
  82  */
  83
  84 #if defined(CONFIG_CMD_MEMORY)          \
  85         || defined(CONFIG_CMD_I2C)      \
  86         || defined(CONFIG_CMD_ITEST)    \
  87         || defined(CONFIG_CMD_PCI)      \
  88         || defined(CONFIG_CMD_PORTIO)
  89 #define CMD_DATA_SIZE
  90 extern int cmd_get_data_size(char* arg, int default_size);
  91 #endif
  92
  93 #ifdef CONFIG_CMD_BOOTD
  94 extern int do_bootd(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
  95 #endif
  96 #ifdef CONFIG_CMD_BOOTM
  97 extern int do_bootm(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
  98 extern int bootm_maybe_autostart(cmd_tbl_t *cmdtp, const char *cmd);
  99 #else
 100 static inline int bootm_maybe_autostart(cmd_tbl_t *cmdtp, const char *cmd)
 101 {
 102         return 0;
 103 }
 104 #endif
 105
 106 extern int do_bootz(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
 113 /*
 114  * Error codes that commands return to cmd_process(). We use the standard 0
 115  * and 1 for success and failure, but add one more case - failure with a
 116  * request to call cmd_usage(). But the cmd_process() function handles
 117  * CMD_RET_USAGE itself and after calling cmd_usage() it will return 1.
 118  * This is just a convenience for commands to avoid them having to call
 119  * cmd_usage() all over the place.
 120  */
 121 enum command_ret_t {
 122         CMD_RET_SUCCESS,        /* 0 = Success */
 123         CMD_RET_FAILURE,        /* 1 = Failure */
 124         CMD_RET_USAGE = -1,     /* Failure, please report 'usage' error */
 125 };
 126
 127 /**
 128  * Process a command with arguments. We look up the command and execute it
 129  * if valid. Otherwise we print a usage message.
 130  *
 131  * @param flag          Some flags normally 0 (see CMD_FLAG_.. above)
 132  * @param argc          Number of arguments (arg 0 must be the command text)
 133  * @param argv          Arguments
 134  * @param repeatable    This function sets this to 0 if the command is not
 135  *                      repeatable. If the command is repeatable, the value
 136  *                      is left unchanged.
 137  * @param ticks         If ticks is not null, this function set it to the
 138  *                      number of ticks the command took to complete.
 139  * @return 0 if the command succeeded, 1 if it failed
 140  */
 141 int cmd_process(int flag, int argc, char * const argv[],
 142                                int *repeatable, unsigned long *ticks);
 143
 144 #endif  /* __ASSEMBLY__ */
 145
 146 /*
 147  * Command Flags:
 148  */
 149 #define CMD_FLAG_REPEAT         0x0001  /* repeat last command          */
 150 #define CMD_FLAG_BOOTD          0x0002  /* command is from bootd        */
 151
 152 #ifdef CONFIG_AUTO_COMPLETE
 153 # define _CMD_COMPLETE(x) x,
 154 #else
 155 # define _CMD_COMPLETE(x)
 156 #endif
 157 #ifdef CONFIG_SYS_LONGHELP
 158 # define _CMD_HELP(x) x,
 159 #else
 160 # define _CMD_HELP(x)
 161 #endif
 162
 163 #define U_BOOT_CMD_MKENT_COMPLETE(_name, _maxargs, _rep, _cmd,          \
 164                                 _usage, _help, _comp)                   \
 165                 { #_name, _maxargs, _rep, _cmd, _usage,                 \
 166                         _CMD_HELP(_help) _CMD_COMPLETE(_comp) }
 167
 168 #define U_BOOT_CMD_MKENT(_name, _maxargs, _rep, _cmd, _usage, _help)    \
 169         U_BOOT_CMD_MKENT_COMPLETE(_name, _maxargs, _rep, _cmd,          \
 170                                         _usage, _help, NULL)
 171
 172 #define U_BOOT_CMD_COMPLETE(_name, _maxargs, _rep, _cmd, _usage, _help, _comp) \
 173         ll_entry_declare(cmd_tbl_t, _name, cmd) =                       \
 174                 U_BOOT_CMD_MKENT_COMPLETE(_name, _maxargs, _rep, _cmd,  \
 175                                                 _usage, _help, _comp);
 176
 177 #define U_BOOT_CMD(_name, _maxargs, _rep, _cmd, _usage, _help)          \
 178         U_BOOT_CMD_COMPLETE(_name, _maxargs, _rep, _cmd, _usage, _help, NULL)
 179
 180 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
 181 void fixup_cmdtable(cmd_tbl_t *cmdtp, int size);
 182 #endif
 183
 184 #endif  /* __COMMAND_H */