include/command.h

   1 /*
   2  * (C) Copyright 2000-2009
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 /*
  25  *  Definitions for Command Processor
  26  */
  27 #ifndef __COMMAND_H
  28 #define __COMMAND_H
  29
  30 #include <config.h>
  31 #include <linker_lists.h>
  32
  33 #ifndef NULL
  34 #define NULL    0
  35 #endif
  36
  37 /* Default to a width of 8 characters for help message command width */
  38 #ifndef CONFIG_SYS_HELP_CMD_WIDTH
  39 #define CONFIG_SYS_HELP_CMD_WIDTH       8
  40 #endif
  41
  42 #ifndef __ASSEMBLY__
  43 /*
  44  * Monitor Command Table
  45  */
  46
  47 struct cmd_tbl_s {
  48         char            *name;          /* Command Name                 */
  49         int             maxargs;        /* maximum number of arguments  */
  50         int             repeatable;     /* autorepeat allowed?          */
  51                                         /* Implementation function      */
  52         int             (*cmd)(struct cmd_tbl_s *, int, int, char * const []);
  53         char            *usage;         /* Usage message        (short) */
  54 #ifdef  CONFIG_SYS_LONGHELP
  55         char            *help;          /* Help  message        (long)  */
  56 #endif
  57 #ifdef CONFIG_AUTO_COMPLETE
  58         /* do auto completion on the arguments */
  59         int             (*complete)(int argc, char * const argv[], char last_char, int maxv, char *cmdv[]);
  60 #endif
  61 };
  62
  63 typedef struct cmd_tbl_s        cmd_tbl_t;
  64
  65
  66 #if defined(CONFIG_CMD_RUN)
  67 extern int do_run(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
  68 #endif
  69
  70 /* common/command.c */
  71 int _do_help (cmd_tbl_t *cmd_start, int cmd_items, cmd_tbl_t * cmdtp, int
  72               flag, int argc, char * const argv[]);
  73 cmd_tbl_t *find_cmd(const char *cmd);
  74 cmd_tbl_t *find_cmd_tbl (const char *cmd, cmd_tbl_t *table, int table_len);
  75
  76 extern int cmd_usage(const cmd_tbl_t *cmdtp);
  77
  78 #ifdef CONFIG_AUTO_COMPLETE
  79 extern int var_complete(int argc, char * const argv[], char last_char, int maxv, char *cmdv[]);
  80 extern int cmd_auto_complete(const char *const prompt, char *buf, int *np, int *colp);
  81 #endif
  82
  83 /*
  84  * Monitor Command
  85  *
  86  * All commands use a common argument format:
  87  *
  88  * void function (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
  89  */
  90
  91 #if defined(CONFIG_CMD_MEMORY)          \
  92         || defined(CONFIG_CMD_I2C)      \
  93         || defined(CONFIG_CMD_ITEST)    \
  94         || defined(CONFIG_CMD_PCI)      \
  95         || defined(CONFIG_CMD_PORTIO)
  96 #define CMD_DATA_SIZE
  97 extern int cmd_get_data_size(char* arg, int default_size);
  98 #endif
  99
 100 #ifdef CONFIG_CMD_BOOTD
 101 extern int do_bootd(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
 102 #endif
 103 #ifdef CONFIG_CMD_BOOTM
 104 extern int do_bootm(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
 105 extern int bootm_maybe_autostart(cmd_tbl_t *cmdtp, const char *cmd);
 106 #else
 107 static inline int bootm_maybe_autostart(cmd_tbl_t *cmdtp, const char *cmd)
 108 {
 109         return 0;
 110 }
 111 #endif
 112
 113 extern int do_bootz(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
 114
 115 extern int common_diskboot(cmd_tbl_t *cmdtp, const char *intf, int argc,
 116                            char *const argv[]);
 117
 118 extern int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
 119
 120 /*
 121  * Error codes that commands return to cmd_process(). We use the standard 0
 122  * and 1 for success and failure, but add one more case - failure with a
 123  * request to call cmd_usage(). But the cmd_process() function handles
 124  * CMD_RET_USAGE itself and after calling cmd_usage() it will return 1.
 125  * This is just a convenience for commands to avoid them having to call
 126  * cmd_usage() all over the place.
 127  */
 128 enum command_ret_t {
 129         CMD_RET_SUCCESS,        /* 0 = Success */
 130         CMD_RET_FAILURE,        /* 1 = Failure */
 131         CMD_RET_USAGE = -1,     /* Failure, please report 'usage' error */
 132 };
 133
 134 /**
 135  * Process a command with arguments. We look up the command and execute it
 136  * if valid. Otherwise we print a usage message.
 137  *
 138  * @param flag          Some flags normally 0 (see CMD_FLAG_.. above)
 139  * @param argc          Number of arguments (arg 0 must be the command text)
 140  * @param argv          Arguments
 141  * @param repeatable    This function sets this to 0 if the command is not
 142  *                      repeatable. If the command is repeatable, the value
 143  *                      is left unchanged.
 144  * @param ticks         If ticks is not null, this function set it to the
 145  *                      number of ticks the command took to complete.
 146  * @return 0 if the command succeeded, 1 if it failed
 147  */
 148 int cmd_process(int flag, int argc, char * const argv[],
 149                                int *repeatable, unsigned long *ticks);
 150
 151 #endif  /* __ASSEMBLY__ */
 152
 153 /*
 154  * Command Flags:
 155  */
 156 #define CMD_FLAG_REPEAT         0x0001  /* repeat last command          */
 157 #define CMD_FLAG_BOOTD          0x0002  /* command is from bootd        */
 158
 159 #ifdef CONFIG_AUTO_COMPLETE
 160 # define _CMD_COMPLETE(x) x,
 161 #else
 162 # define _CMD_COMPLETE(x)
 163 #endif
 164 #ifdef CONFIG_SYS_LONGHELP
 165 # define _CMD_HELP(x) x,
 166 #else
 167 # define _CMD_HELP(x)
 168 #endif
 169
 170 #define U_BOOT_CMD_MKENT_COMPLETE(_name, _maxargs, _rep, _cmd,          \
 171                                 _usage, _help, _comp)                   \
 172                 { #_name, _maxargs, _rep, _cmd, _usage,                 \
 173                         _CMD_HELP(_help) _CMD_COMPLETE(_comp) }
 174
 175 #define U_BOOT_CMD_MKENT(_name, _maxargs, _rep, _cmd, _usage, _help)    \
 176         U_BOOT_CMD_MKENT_COMPLETE(_name, _maxargs, _rep, _cmd,          \
 177                                         _usage, _help, NULL)
 178
 179 #define U_BOOT_CMD_COMPLETE(_name, _maxargs, _rep, _cmd, _usage, _help, _comp) \
 180         ll_entry_declare(cmd_tbl_t, _name, cmd) =                       \
 181                 U_BOOT_CMD_MKENT_COMPLETE(_name, _maxargs, _rep, _cmd,  \
 182                                                 _usage, _help, _comp);
 183
 184 #define U_BOOT_CMD(_name, _maxargs, _rep, _cmd, _usage, _help)          \
 185         U_BOOT_CMD_COMPLETE(_name, _maxargs, _rep, _cmd, _usage, _help, NULL)
 186
 187 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
 188 void fixup_cmdtable(cmd_tbl_t *cmdtp, int size);
 189 #endif
 190
 191 #endif  /* __COMMAND_H */