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barebox/common/main.c

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/*
* (C) Copyright 2000
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* Add to readline cmdline-editing by
* (C) Copyright 2005
* JinHua Luo, GuangDong Linux Center, <luo.jinhua@gd-linux.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
/* #define DEBUG */
#include <common.h>
#include <environment.h>
#include <watchdog.h>
#include <command.h>
#ifdef CONFIG_HUSH_PARSER
#include <hush.h>
#endif
#include <post.h>
#if defined(CONFIG_BOOT_RETRY_TIME) && defined(CONFIG_RESET_TO_RETRY)
extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]); /* for do_reset() prototype */
#endif
extern int do_bootd (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
#define MAX_DELAY_STOP_STR 32
#if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
static int abortboot(int);
#endif
#undef DEBUG_PARSER
char console_buffer[CONFIG_CBSIZE]; /* console I/O buffer */
#ifdef CONFIG_BOOT_RETRY_TIME
static uint64_t endtime = 0; /* must be set, default is instant timeout */
static int retry_time = -1; /* -1 so can call readline before main_loop */
#endif
#ifndef CONFIG_BOOT_RETRY_MIN
#define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME
#endif
/***************************************************************************
* Watch for 'delay' seconds for autoboot stop or autoboot delay string.
* returns: 0 - no key string, allow autoboot
* 1 - got key string, abort
*/
#if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
# if defined(CONFIG_AUTOBOOT_KEYED)
static __inline__ int abortboot(int bootdelay)
{
int abort = 0;
ulong etime;
struct {
char* str;
u_int len;
int retry;
}
delaykey [] = {
{ str: getenv ("bootdelaykey"), retry: 1 },
{ str: getenv ("bootdelaykey2"), retry: 1 },
{ str: getenv ("bootstopkey"), retry: 0 },
{ str: getenv ("bootstopkey2"), retry: 0 },
};
char presskey [MAX_DELAY_STOP_STR];
u_int presskey_len = 0;
u_int presskey_max = 0;
u_int i;
#ifdef CONFIG_SILENT_CONSOLE
if (gd->flags & GD_FLG_SILENT) {
/* Restore serial console */
console_assign (stdout, "serial");
console_assign (stderr, "serial");
}
#endif
# ifdef CONFIG_AUTOBOOT_PROMPT
printf (CONFIG_AUTOBOOT_PROMPT, bootdelay);
# endif
# ifdef CONFIG_AUTOBOOT_DELAY_STR
if (delaykey[0].str == NULL)
delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR;
# endif
# ifdef CONFIG_AUTOBOOT_DELAY_STR2
if (delaykey[1].str == NULL)
delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2;
# endif
# ifdef CONFIG_AUTOBOOT_STOP_STR
if (delaykey[2].str == NULL)
delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR;
# endif
# ifdef CONFIG_AUTOBOOT_STOP_STR2
if (delaykey[3].str == NULL)
delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2;
# endif
for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
delaykey[i].len = delaykey[i].str == NULL ?
0 : strlen (delaykey[i].str);
delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ?
MAX_DELAY_STOP_STR : delaykey[i].len;
presskey_max = presskey_max > delaykey[i].len ?
presskey_max : delaykey[i].len;
# if DEBUG_BOOTKEYS
printf("%s key:<%s>\n",
delaykey[i].retry ? "delay" : "stop",
delaykey[i].str ? delaykey[i].str : "NULL");
# endif
}
/* In order to keep up with incoming data, check timeout only
* when catch up.
*/
etime = get_timer(0);
while (!abort && get_timer(etime) <= bootdelay * CFG_HZ) {
for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
if (delaykey[i].len > 0 &&
presskey_len >= delaykey[i].len &&
memcmp (presskey + presskey_len - delaykey[i].len,
delaykey[i].str,
delaykey[i].len) == 0) {
# if DEBUG_BOOTKEYS
printf("got %skey\n",
delaykey[i].retry ? "delay" : "stop");
# endif
# ifdef CONFIG_BOOT_RETRY_TIME
/* don't retry auto boot */
if (! delaykey[i].retry)
retry_time = -1;
# endif
abort = 1;
}
}
if (tstc()) {
if (presskey_len < presskey_max) {
presskey [presskey_len ++] = getc();
}
else {
for (i = 0; i < presskey_max - 1; i ++)
presskey [i] = presskey [i + 1];
presskey [i] = getc();
}
}
}
# if DEBUG_BOOTKEYS
if (!abort)
puts ("key timeout\n");
# endif
#ifdef CONFIG_SILENT_CONSOLE
if (abort) {
/* permanently enable normal console output */
gd->flags &= ~(GD_FLG_SILENT);
} else if (gd->flags & GD_FLG_SILENT) {
/* Restore silent console */
console_assign (stdout, "nulldev");
console_assign (stderr, "nulldev");
}
#endif
return abort;
}
# else /* !defined(CONFIG_AUTOBOOT_KEYED) */
#ifdef CONFIG_MENUKEY
static int menukey = 0;
#endif
static __inline__ int abortboot(int bootdelay)
{
int abort = 0;
#ifdef CONFIG_SILENT_CONSOLE
if (gd->flags & GD_FLG_SILENT) {
/* Restore serial console */
console_assign (stdout, "serial");
console_assign (stderr, "serial");
}
#endif
#ifdef CONFIG_MENUPROMPT
printf(CONFIG_MENUPROMPT, bootdelay);
#else
printf("Hit any key to stop autoboot: %2d ", bootdelay);
#endif
#if defined CONFIG_ZERO_BOOTDELAY_CHECK
/*
* Check if key already pressed
* Don't check if bootdelay < 0
*/
if (bootdelay >= 0) {
if (tstc()) { /* we got a key press */
(void) getc(); /* consume input */
puts ("\b\b\b 0");
abort = 1; /* don't auto boot */
}
}
#endif
while ((bootdelay > 0) && (!abort)) {
int i;
--bootdelay;
/* delay 100 * 10ms */
for (i=0; !abort && i<100; ++i) {
if (tstc()) { /* we got a key press */
abort = 1; /* don't auto boot */
bootdelay = 0; /* no more delay */
# ifdef CONFIG_MENUKEY
menukey = getc();
# else
(void) getc(); /* consume input */
# endif
break;
}
udelay (10000);
}
printf ("\b\b\b%2d ", bootdelay);
}
putc ('\n');
#ifdef CONFIG_SILENT_CONSOLE
if (abort) {
/* permanently enable normal console output */
gd->flags &= ~(GD_FLG_SILENT);
} else if (gd->flags & GD_FLG_SILENT) {
/* Restore silent console */
console_assign (stdout, "nulldev");
console_assign (stderr, "nulldev");
}
#endif
return abort;
}
# endif /* CONFIG_AUTOBOOT_KEYED */
#endif /* CONFIG_BOOTDELAY >= 0 */
/****************************************************************************/
void main_loop (void)
{
#ifndef CONFIG_HUSH_PARSER
static char lastcommand[CONFIG_CBSIZE] = { 0, };
int len;
int rc = 1;
int flag;
#endif
#if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
char *s;
int bootdelay;
#endif
#ifdef CONFIG_PREBOOT
char *p;
#endif
#ifdef CONFIG_BOOTCOUNT_LIMIT
unsigned long bootcount = 0;
unsigned long bootlimit = 0;
char *bcs;
char bcs_set[16];
#endif /* CONFIG_BOOTCOUNT_LIMIT */
#ifdef CONFIG_BOOTCOUNT_LIMIT
bootcount = bootcount_load();
bootcount++;
bootcount_store (bootcount);
sprintf (bcs_set, "%lu", bootcount);
setenv ("bootcount", bcs_set);
bcs = getenv ("bootlimit");
bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0;
#endif /* CONFIG_BOOTCOUNT_LIMIT */
#ifdef CONFIG_HUSH_PARSER
u_boot_hush_start ();
#endif
#ifdef CONFIG_AUTO_COMPLETE
install_auto_complete();
#endif
#ifdef CONFIG_PREBOOT
if ((p = getenv ("preboot")) != NULL) {
# ifdef CONFIG_AUTOBOOT_KEYED
int prev = disable_ctrlc(1); /* disable Control C checking */
# endif
# ifndef CONFIG_HUSH_PARSER
run_command (p, 0);
# else
parse_string_outer(p, FLAG_PARSE_SEMICOLON |
FLAG_EXIT_FROM_LOOP);
# endif
# ifdef CONFIG_AUTOBOOT_KEYED
disable_ctrlc(prev); /* restore Control C checking */
# endif
}
#endif /* CONFIG_PREBOOT */
#if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
s = getenv ("bootdelay");
bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY;
debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay);
# ifdef CONFIG_BOOT_RETRY_TIME
init_cmd_timeout ();
# endif /* CONFIG_BOOT_RETRY_TIME */
#ifdef CONFIG_BOOTCOUNT_LIMIT
if (bootlimit && (bootcount > bootlimit)) {
printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n",
(unsigned)bootlimit);
s = getenv ("altbootcmd");
}
else
#endif /* CONFIG_BOOTCOUNT_LIMIT */
s = getenv ("bootcmd");
debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");
if (bootdelay >= 0 && s && !abortboot (bootdelay)) {
# ifdef CONFIG_AUTOBOOT_KEYED
int prev = disable_ctrlc(1); /* disable Control C checking */
# endif
# ifndef CONFIG_HUSH_PARSER
run_command (s, 0);
# else
parse_string_outer(s, FLAG_PARSE_SEMICOLON |
FLAG_EXIT_FROM_LOOP);
# endif
# ifdef CONFIG_AUTOBOOT_KEYED
disable_ctrlc(prev); /* restore Control C checking */
# endif
}
# ifdef CONFIG_MENUKEY
if (menukey == CONFIG_MENUKEY) {
s = getenv("menucmd");
if (s) {
# ifndef CONFIG_HUSH_PARSER
run_command (s, 0);
# else
parse_string_outer(s, FLAG_PARSE_SEMICOLON |
FLAG_EXIT_FROM_LOOP);
# endif
}
}
#endif /* CONFIG_MENUKEY */
#endif /* CONFIG_BOOTDELAY */
/*
* Main Loop for Monitor Command Processing
*/
#ifdef CONFIG_HUSH_PARSER
parse_file_outer();
/* This point is never reached */
for (;;);
#else
for (;;) {
#ifdef CONFIG_BOOT_RETRY_TIME
if (rc >= 0) {
/* Saw enough of a valid command to
* restart the timeout.
*/
reset_cmd_timeout();
}
#endif
len = readline (CONFIG_PROMPT);
flag = 0; /* assume no special flags for now */
if (len > 0)
strcpy (lastcommand, console_buffer);
else if (len == 0)
flag |= CMD_FLAG_REPEAT;
#ifdef CONFIG_BOOT_RETRY_TIME
else if (len == -2) {
/* -2 means timed out, retry autoboot
*/
puts ("\nTimed out waiting for command\n");
# ifdef CONFIG_RESET_TO_RETRY
/* Reinit board to run initialization code again */
do_reset (NULL, 0, 0, NULL);
# else
return; /* retry autoboot */
# endif
}
#endif
if (len == -1)
puts ("<INTERRUPT>\n");
else
rc = run_command (lastcommand, flag);
if (rc <= 0) {
/* invalid command or not repeatable, forget it */
lastcommand[0] = 0;
}
}
#endif /*CONFIG_HUSH_PARSER*/
}
#ifdef CONFIG_BOOT_RETRY_TIME
/***************************************************************************
* initialize command line timeout
*/
void init_cmd_timeout(void)
{
char *s = getenv ("bootretry");
if (s != NULL)
retry_time = (int)simple_strtol(s, NULL, 10);
else
retry_time = CONFIG_BOOT_RETRY_TIME;
if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN)
retry_time = CONFIG_BOOT_RETRY_MIN;
}
/***************************************************************************
* reset command line timeout to retry_time seconds
*/
void reset_cmd_timeout(void)
{
endtime = endtick(retry_time);
}
#endif
/****************************************************************************/
/****************************************************************************/
# if 0
int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
{
int i;
if (argc < 2) {
printf ("Usage:\n%s\n", cmdtp->usage);
return 1;
}
for (i=1; i<argc; ++i) {
char *arg;
if ((arg = getenv (argv[i])) == NULL) {
printf ("## Error: \"%s\" not defined\n", argv[i]);
return 1;
}
#ifndef CONFIG_HUSH_PARSER
if (run_command (arg, flag) == -1)
return 1;
#else
if (parse_string_outer(arg,
FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP) != 0)
return 1;
#endif
}
return 0;
}
U_BOOT_CMD(
run, CONFIG_MAXARGS, 1, do_run,
"run - run commands in an environment variable\n",
"var [...]\n"
" - run the commands in the environment variable(s) 'var'\n"
);
#endif
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