1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Copyright 2000-2009
3*4882a593Smuzhiyun * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <common.h>
9*4882a593Smuzhiyun #include <command.h>
10*4882a593Smuzhiyun
do_help(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])11*4882a593Smuzhiyun static int do_help(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
12*4882a593Smuzhiyun {
13*4882a593Smuzhiyun #ifdef CONFIG_CMDLINE
14*4882a593Smuzhiyun cmd_tbl_t *start = ll_entry_start(cmd_tbl_t, cmd);
15*4882a593Smuzhiyun const int len = ll_entry_count(cmd_tbl_t, cmd);
16*4882a593Smuzhiyun return _do_help(start, len, cmdtp, flag, argc, argv);
17*4882a593Smuzhiyun #else
18*4882a593Smuzhiyun return 0;
19*4882a593Smuzhiyun #endif
20*4882a593Smuzhiyun }
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun U_BOOT_CMD(
23*4882a593Smuzhiyun help, CONFIG_SYS_MAXARGS, 1, do_help,
24*4882a593Smuzhiyun "print command description/usage",
25*4882a593Smuzhiyun "\n"
26*4882a593Smuzhiyun " - print brief description of all commands\n"
27*4882a593Smuzhiyun "help command ...\n"
28*4882a593Smuzhiyun " - print detailed usage of 'command'"
29*4882a593Smuzhiyun );
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun /* This does not use the U_BOOT_CMD macro as ? can't be used in symbol names */
32*4882a593Smuzhiyun ll_entry_declare(cmd_tbl_t, question_mark, cmd) = {
33*4882a593Smuzhiyun "?", CONFIG_SYS_MAXARGS, 1, do_help,
34*4882a593Smuzhiyun "alias for 'help'",
35*4882a593Smuzhiyun #ifdef CONFIG_SYS_LONGHELP
36*4882a593Smuzhiyun ""
37*4882a593Smuzhiyun #endif /* CONFIG_SYS_LONGHELP */
38*4882a593Smuzhiyun };
39