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Diffstat (limited to 'common/main.c')
| -rw-r--r-- | common/main.c | 817 |
1 files changed, 817 insertions, 0 deletions
diff --git a/common/main.c b/common/main.c new file mode 100644 index 0000000..014804b --- /dev/null +++ b/common/main.c @@ -0,0 +1,817 @@ +/* + * (C) Copyright 2000 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * 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 + */ + +#include <common.h> +#include <watchdog.h> +#include <command.h> +#include <cmd_nvedit.h> +#include <cmd_bootm.h> +#include <malloc.h> +#if defined(CONFIG_BOOT_RETRY_TIME) && defined(CONFIG_RESET_TO_RETRY) +#include <cmd_boot.h> /* for do_reset() prototype */ +#endif + +#ifdef CFG_HUSH_PARSER +#include <hush.h> +#endif + +#define MAX_DELAY_STOP_STR 32 + +static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen); +static int parse_line (char *, char *[]); +#if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) +static int abortboot(int); +#endif + +#undef DEBUG_PARSER + +char console_buffer[CFG_CBSIZE]; /* console I/O buffer */ + +static char erase_seq[] = "\b \b"; /* erase sequence */ +static char tab_seq[] = " "; /* used to expand TABs */ + +#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 + +#define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk()) + +#ifndef CONFIG_BOOT_RETRY_MIN +#define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME +#endif + +#ifdef CONFIG_MODEM_SUPPORT +int do_mdm_init = 0; +extern void mdm_init(void); /* defined in board.c */ +#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; + uint64_t etime = endtick(bootdelay); + 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_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. + */ + while (!abort && get_ticks() <= etime) { + 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) + printf("key timeout\n"); +# endif + + return abort; +} + +# else /* !defined(CONFIG_AUTOBOOT_KEYED) */ + +static __inline__ int abortboot(int bootdelay) +{ + int abort = 0; + + printf("Hit any key to stop autoboot: %2d ", bootdelay); + +#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 */ + printf ("\b\b\b 0\n"); + return 1; /* don't auto boot */ + } + } +#endif + + while (bootdelay > 0) { + 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 */ + (void) getc(); /* consume input */ + break; + } + udelay (10000); + } + + printf ("\b\b\b%2d ", bootdelay); + } + + putc ('\n'); + + return abort; +} +# endif /* CONFIG_AUTOBOOT_KEYED */ +#endif /* CONFIG_BOOTDELAY >= 0 */ + +/****************************************************************************/ + +void main_loop (void) +{ +#ifndef CFG_HUSH_PARSER + static char lastcommand[CFG_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 + +#if defined(CONFIG_VFD) && defined(VFD_TEST_LOGO) + ulong bmp = 0; /* default bitmap */ + extern int trab_vfd (ulong bitmap); + +#ifdef CONFIG_MODEM_SUPPORT + if (do_mdm_init) + bmp = 1; /* alternate bitmap */ +#endif + trab_vfd (bmp); +#endif /* CONFIG_VFD && VFD_TEST_LOGO */ + +#ifdef CONFIG_MODEM_SUPPORT + debug ("DEBUG: main_loop: do_mdm_init=%d\n", do_mdm_init); + if (do_mdm_init) { + uchar *str = strdup(getenv("mdm_cmd")); + setenv ("preboot", str); /* set or delete definition */ + if (str != NULL) + free (str); + mdm_init(); /* wait for modem connection */ + } +#endif /* CONFIG_MODEM_SUPPORT */ + +#ifdef CFG_HUSH_PARSER + u_boot_hush_start (); +#endif + +#ifdef CONFIG_PREBOOT + if ((p = getenv ("preboot")) != NULL) { +# ifdef CONFIG_AUTOBOOT_KEYED + int prev = disable_ctrlc(1); /* disable Control C checking */ +# endif + +# ifndef CFG_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; + +#if 0 + printf ("### main_loop entered:\n\n"); +#endif + +# ifdef CONFIG_BOOT_RETRY_TIME + s = getenv ("bootretry"); + if (s != NULL) + retry_time = (int)simple_strtoul(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; +# endif /* CONFIG_BOOT_RETRY_TIME */ + + s = getenv ("bootcmd"); + if (bootdelay >= 0 && s && !abortboot (bootdelay)) { +# ifdef CONFIG_AUTOBOOT_KEYED + int prev = disable_ctrlc(1); /* disable Control C checking */ +# endif + +# ifndef CFG_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 + } +#endif /* CONFIG_BOOTDELAY */ + + /* + * Main Loop for Monitor Command Processing + */ +#ifdef CFG_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 (CFG_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 + */ + printf("\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) + printf ("<INTERRUPT>\n"); + else + rc = run_command (lastcommand, flag); + + if (rc <= 0) { + /* invalid command or not repeatable, forget it */ + lastcommand[0] = 0; + } + } +#endif /*CFG_HUSH_PARSER*/ +} + +/*************************************************************************** + * reset command line timeout to retry_time seconds + */ +#ifdef CONFIG_BOOT_RETRY_TIME +void reset_cmd_timeout(void) +{ + endtime = endtick(retry_time); +} +#endif + +/****************************************************************************/ + +/* + * Prompt for input and read a line. + * If CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0, + * time out when time goes past endtime (timebase time in ticks). + * Return: number of read characters + * -1 if break + * -2 if timed out + */ +int readline (const char *const prompt) +{ + char *p = console_buffer; + int n = 0; /* buffer index */ + int plen = 0; /* prompt length */ + int col; /* output column cnt */ + char c; + + /* print prompt */ + if (prompt) { + plen = strlen (prompt); + puts (prompt); + } + col = plen; + + for (;;) { +#ifdef CONFIG_BOOT_RETRY_TIME + while (!tstc()) { /* while no incoming data */ + if (retry_time >= 0 && get_ticks() > endtime) + return (-2); /* timed out */ + } +#endif + WATCHDOG_RESET(); /* Trigger watchdog, if needed */ + +#ifdef CONFIG_SHOW_ACTIVITY + while (!tstc()) { + extern void show_activity(int arg); + show_activity(0); + } +#endif + c = getc(); + + /* + * Special character handling + */ + switch (c) { + case '\r': /* Enter */ + case '\n': + *p = '\0'; + puts ("\r\n"); + return (p - console_buffer); + + case 0x03: /* ^C - break */ + console_buffer[0] = '\0'; /* discard input */ + return (-1); + + case 0x15: /* ^U - erase line */ + while (col > plen) { + puts (erase_seq); + --col; + } + p = console_buffer; + n = 0; + continue; + + case 0x17: /* ^W - erase word */ + p=delete_char(console_buffer, p, &col, &n, plen); + while ((n > 0) && (*p != ' ')) { + p=delete_char(console_buffer, p, &col, &n, plen); + } + continue; + + case 0x08: /* ^H - backspace */ + case 0x7F: /* DEL - backspace */ + p=delete_char(console_buffer, p, &col, &n, plen); + continue; + + default: + /* + * Must be a normal character then + */ + if (n < CFG_CBSIZE-2) { + if (c == '\t') { /* expand TABs */ + puts (tab_seq+(col&07)); + col += 8 - (col&07); + } else { + ++col; /* echo input */ + putc (c); + } + *p++ = c; + ++n; + } else { /* Buffer full */ + putc ('\a'); + } + } + } +} + +/****************************************************************************/ + +static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen) +{ + char *s; + + if (*np == 0) { + return (p); + } + + if (*(--p) == '\t') { /* will retype the whole line */ + while (*colp > plen) { + puts (erase_seq); + (*colp)--; + } + for (s=buffer; s<p; ++s) { + if (*s == '\t') { + puts (tab_seq+((*colp) & 07)); + *colp += 8 - ((*colp) & 07); + } else { + ++(*colp); + putc (*s); + } + } + } else { + puts (erase_seq); + (*colp)--; + } + (*np)--; + return (p); +} + +/****************************************************************************/ + +int parse_line (char *line, char *argv[]) +{ + int nargs = 0; + +#ifdef DEBUG_PARSER + printf ("parse_line: \"%s\"\n", line); +#endif + while (nargs < CFG_MAXARGS) { + + /* skip any white space */ + while ((*line == ' ') || (*line == '\t')) { + ++line; + } + + if (*line == '\0') { /* end of line, no more args */ + argv[nargs] = NULL; +#ifdef DEBUG_PARSER + printf ("parse_line: nargs=%d\n", nargs); +#endif + return (nargs); + } + + argv[nargs++] = line; /* begin of argument string */ + + /* find end of string */ + while (*line && (*line != ' ') && (*line != '\t')) { + ++line; + } + + if (*line == '\0') { /* end of line, no more args */ + argv[nargs] = NULL; +#ifdef DEBUG_PARSER + printf ("parse_line: nargs=%d\n", nargs); +#endif + return (nargs); + } + + *line++ = '\0'; /* terminate current arg */ + } + + printf ("** Too many args (max. %d) **\n", CFG_MAXARGS); + +#ifdef DEBUG_PARSER + printf ("parse_line: nargs=%d\n", nargs); +#endif + return (nargs); +} + +/****************************************************************************/ + +static void process_macros (const char *input, char *output) +{ + char c, prev; + const char *varname_start = NULL; + int inputcnt = strlen (input); + int outputcnt = CFG_CBSIZE; + int state = 0; /* 0 = waiting for '$' */ + /* 1 = waiting for '(' */ + /* 2 = waiting for ')' */ + +#ifdef DEBUG_PARSER + char *output_start = output; + + printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen(input), input); +#endif + + prev = '\0'; /* previous character */ + + while (inputcnt && outputcnt) { + c = *input++; + inputcnt--; + + /* remove one level of escape characters */ + if ((c == '\\') && (prev != '\\')) { + if (inputcnt-- == 0) + break; + prev = c; + c = *input++; + } + + switch (state) { + case 0: /* Waiting for (unescaped) $ */ + if ((c == '$') && (prev != '\\')) { + state++; + } else { + *(output++) = c; + outputcnt--; + } + break; + case 1: /* Waiting for ( */ + if (c == '(') { + state++; + varname_start = input; + } else { + state = 0; + *(output++) = '$'; + outputcnt--; + + if (outputcnt) { + *(output++) = c; + outputcnt--; + } + } + break; + case 2: /* Waiting for ) */ + if (c == ')') { + int i; + char envname[CFG_CBSIZE], *envval; + int envcnt = input-varname_start-1; /* Varname # of chars */ + + /* Get the varname */ + for (i = 0; i < envcnt; i++) { + envname[i] = varname_start[i]; + } + envname[i] = 0; + + /* Get its value */ + envval = getenv (envname); + + /* Copy into the line if it exists */ + if (envval != NULL) + while ((*envval) && outputcnt) { + *(output++) = *(envval++); + outputcnt--; + } + /* Look for another '$' */ + state = 0; + } + break; + } + + prev = c; + } + + if (outputcnt) + *output = 0; + +#ifdef DEBUG_PARSER + printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n", + strlen(output_start), output_start); +#endif +} + +/**************************************************************************** + * returns: + * 1 - command executed, repeatable + * 0 - command executed but not repeatable, interrupted commands are + * always considered not repeatable + * -1 - not executed (unrecognized, bootd recursion or too many args) + * (If cmd is NULL or "" or longer than CFG_CBSIZE-1 it is + * considered unrecognized) + * + * WARNING: + * + * We must create a temporary copy of the command since the command we get + * may be the result from getenv(), which returns a pointer directly to + * the environment data, which may change magicly when the command we run + * creates or modifies environment variables (like "bootp" does). + */ + +int run_command (const char *cmd, int flag) +{ + cmd_tbl_t *cmdtp; + char cmdbuf[CFG_CBSIZE]; /* working copy of cmd */ + char *token; /* start of token in cmdbuf */ + char *sep; /* end of token (separator) in cmdbuf */ + char finaltoken[CFG_CBSIZE]; + char *str = cmdbuf; + char *argv[CFG_MAXARGS + 1]; /* NULL terminated */ + int argc; + int repeatable = 1; + +#ifdef DEBUG_PARSER + printf ("[RUN_COMMAND] cmd[%p]=\"", cmd); + puts (cmd ? cmd : "NULL"); /* use puts - string may be loooong */ + puts ("\"\n"); +#endif + + clear_ctrlc(); /* forget any previous Control C */ + + if (!cmd || !*cmd) { + return -1; /* empty command */ + } + + if (strlen(cmd) >= CFG_CBSIZE) { + puts ("## Command too long!\n"); + return -1; + } + + strcpy (cmdbuf, cmd); + + /* Process separators and check for invalid + * repeatable commands + */ + +#ifdef DEBUG_PARSER + printf ("[PROCESS_SEPARATORS] %s\n", cmd); +#endif + while (*str) { + + /* + * Find separator, or string end + * Allow simple escape of ';' by writing "\;" + */ + for (sep = str; *sep; sep++) { + if ((*sep == ';') && /* separator */ + ( sep != str) && /* past string start */ + (*(sep-1) != '\\')) /* and NOT escaped */ + break; + } + + /* + * Limit the token to data between separators + */ + token = str; + if (*sep) { + str = sep + 1; /* start of command for next pass */ + *sep = '\0'; + } + else + str = sep; /* no more commands for next pass */ +#ifdef DEBUG_PARSER + printf ("token: \"%s\"\n", token); +#endif + + /* find macros in this token and replace them */ + process_macros (token, finaltoken); + + /* Extract arguments */ + argc = parse_line (finaltoken, argv); + + /* Look up command in command table */ + if ((cmdtp = find_cmd(argv[0])) == NULL) { + printf ("Unknown command '%s' - try 'help'\n", argv[0]); + return -1; /* give up after bad command */ + } + + /* found - check max args */ + if (argc > cmdtp->maxargs) { + printf ("Usage:\n%s\n", cmdtp->usage); + return -1; + } + +#if (CONFIG_COMMANDS & CFG_CMD_BOOTD) + /* avoid "bootd" recursion */ + if (cmdtp->cmd == do_bootd) { +#ifdef DEBUG_PARSER + printf ("[%s]\n", finaltoken); +#endif + if (flag & CMD_FLAG_BOOTD) { + printf ("'bootd' recursion detected\n"); + return -1; + } + else + flag |= CMD_FLAG_BOOTD; + } +#endif /* CFG_CMD_BOOTD */ + + /* OK - call function to do the command */ + if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) { + return (-1); + } + + repeatable &= cmdtp->repeatable; + + /* Did the user stop this? */ + if (had_ctrlc ()) + return 0; /* if stopped then not repeatable */ + } + + return repeatable; +} + +/****************************************************************************/ + +#if (CONFIG_COMMANDS & CFG_CMD_RUN) +int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]) +{ + int i; + int rcode = 1; + + if (argc < 2) { + printf ("Usage:\n%s\n", cmdtp->usage); + return 1; + } + + for (i=1; i<argc; ++i) { +#ifndef CFG_HUSH_PARSER + if (run_command (getenv (argv[i]), flag) != -1) ++rcode; +#else + if (parse_string_outer(getenv (argv[i]), + FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP) == 0) ++rcode; +#endif + } + return ((rcode == i) ? 0 : 1); +} +#endif |