path: root/common/cmd_nvedit.c

/*
 * (C) Copyright 2000-2002
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
 * Andreas Heppel <aheppel@sysgo.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
 */

/**************************************************************************
 *
 * Support for persistent environment data
 *
 * The "environment" is stored as a list of '\0' terminated
 * "name=value" strings. The end of the list is marked by a double
 * '\0'. New entries are always added at the end. Deleting an entry
 * shifts the remaining entries to the front. Replacing an entry is a
 * combination of deleting the old value and adding the new one.
 *
 * The environment is preceeded by a 32 bit CRC over the data part.
 *
 **************************************************************************
 */

#include <common.h>
#include <command.h>
#include <environment.h>
#include <watchdog.h>
#include <serial.h>
#include <linux/stddef.h>
#include <asm/byteorder.h>
#include <malloc.h>
#if (CONFIG_COMMANDS & CFG_CMD_NET)
#include <net.h>
#endif

DECLARE_GLOBAL_DATA_PTR;

#if !defined(CFG_ENV_IS_IN_NVRAM)	&& \
    !defined(CFG_ENV_IS_IN_EEPROM)	&& \
    !defined(CFG_ENV_IS_IN_FLASH)	&& \
    !defined(CFG_ENV_IS_IN_DATAFLASH)	&& \
    !defined(CFG_ENV_IS_IN_NAND)	&& \
    !defined(CFG_ENV_IS_NOWHERE)
# error Define one of CFG_ENV_IS_IN_{NVRAM|EEPROM|FLASH|DATAFLASH|NOWHERE|NAND}
#endif

#define XMK_STR(x)	#x
#define MK_STR(x)	XMK_STR(x)

/************************************************************************
************************************************************************/

/* Function that returns a character from the environment */
extern uchar (*env_get_char)(int);

/* Function that returns a pointer to a value from the environment */
/* (Only memory version supported / needed). */
extern uchar *env_get_addr(int);

/* Function that updates CRC of the enironment */
extern void env_crc_update (void);


/************************************************************************
************************************************************************/

static int envmatch (uchar *, int);

/*
 * Table with supported baudrates (defined in config_xyz.h)
 */
static const unsigned long baudrate_table[] = CFG_BAUDRATE_TABLE;
#define	N_BAUDRATES (sizeof(baudrate_table) / sizeof(baudrate_table[0]))

#if 0
/************************************************************************
 * Command interface: print one or all environment variables
 */

int do_printenv (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
	int i, j, k, nxt;
	int rcode = 0;

	if (argc == 1) {		/* Print all env variables	*/
		for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
			for (nxt=i; env_get_char(nxt) != '\0'; ++nxt)
				;
			for (k=i; k<nxt; ++k)
				putc(env_get_char(k));
			putc  ('\n');

			if (ctrlc()) {
				puts ("\n ** Abort\n");
				return 1;
			}
		}

		printf("\nEnvironment size: %d/%d bytes\n", i, ENV_SIZE);

		return 0;
	}

	for (i=1; i<argc; ++i) {	/* print single env variables	*/
		char *name = argv[i];

		k = -1;

		for (j=0; env_get_char(j) != '\0'; j=nxt+1) {

			for (nxt=j; env_get_char(nxt) != '\0'; ++nxt)
				;
			k = envmatch((uchar *)name, j);
			if (k < 0) {
				continue;
			}
			puts (name);
			putc ('=');
			while (k < nxt)
				putc(env_get_char(k++));
			putc ('\n');
			break;
		}
		if (k < 0) {
			printf ("## Error: \"%s\" not defined\n", name);
			rcode ++;
		}
	}
	return rcode;
}
#endif

/*======rockpzhang======*/

#include <search.h>

/*
 * Command interface: print one or all environment variables
 *
 * Returns 0 in case of error, or length of printed string
 */
static int env_print(char *name)
{
	char *res = NULL;
	size_t len;

	if (name) {		/* print a single name */
		ENTRY e, *ep;

		e.key = name;
		e.data = NULL;
		hsearch_r(e, FIND, &ep, &env_htab);
		if (ep == NULL)
			return 0;
        if(!strncmp(name,"otp.sec.",8)){
            uchar *buf=NULL;   
            len = strlen(ep->data);
            buf = malloc(len);
            if(buf){
                memset(buf,0x00, len);
                otp_sec_decode(ep->data, buf);
                len = printf("%s=%s\n",ep->key, buf);
                free(buf);
                return len;
            }else{
                printf("Malloc mem failed!\n");
                return 0;
            }
                
            
        }
		len = printf("%s=%s\n", ep->key, ep->data);
		return len;
	}

	/* print whole list */
	len = hexport_r(&env_htab, '\n', &res, 0, 0, NULL);

	if (len > 0) {
		puts(res);
		free(res);
		return len;
	}

	/* should never happen */
	return 0;
}


int do_printenv (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	int i;
	int rcode = 0;

	if (argc == 1) {
		/* print all env vars */
		rcode = env_print(NULL);
		if (!rcode)
			return 1;
		printf("\nEnvironment size: %d/%ld bytes\n",
			rcode, (ulong)ENV_SIZE);

		return 0;
	}

	/* print selected env vars */
	for (i = 1; i < argc; ++i) {
		int rc = env_print(argv[i]);
		if (!rc) {
			printf("## Error: \"%s\" not defined\n", argv[i]);
			++rcode;
		}
	}

	return rcode;
}

/*============*/


/*======rockpzhang======*/

/************************************************************************
 * Set a new environment variable,
 * or replace or delete an existing one.
 *
 * This function will ONLY work with a in-RAM copy of the environment
 */
#if 0
int _do_setenv (int flag, int argc, char *argv[])
{
	int   i, len, oldval;
	int   console = -1;
	uchar *env, *nxt = NULL;
	char *name;
	bd_t *bd = gd->bd;

	uchar *env_data = env_get_addr(0);

	if (!env_data)	/* need copy in RAM */
		return 1;

	name = argv[1];

	/*
	 * search if variable with this name already exists
	 */
	oldval = -1;
	for (env=env_data; *env; env=nxt+1) {
		for (nxt=env; *nxt; ++nxt)
			;
		if ((oldval = envmatch((uchar *)name, env-env_data)) >= 0)
			break;
	}

	/*
	 * Delete any existing definition
	 */
	if (oldval >= 0) {
#ifndef CONFIG_ENV_OVERWRITE

		/*
		 * Ethernet Address and serial# can be set only once,
		 * ver is readonly.
		 */
		if ( (strcmp (name, "serial#") == 0) ||
		    ((strcmp (name, "ethaddr") == 0)
#if defined(CONFIG_OVERWRITE_ETHADDR_ONCE) && defined(CONFIG_ETHADDR)
		     && (strcmp ((char *)env_get_addr(oldval),MK_STR(CONFIG_ETHADDR)) != 0)
#endif	/* CONFIG_OVERWRITE_ETHADDR_ONCE && CONFIG_ETHADDR */
		    ) ) {
			printf ("Can't overwrite \"%s\"\n", name);
			return 1;
		}
#endif

		/* Check for console redirection */
		if (strcmp(name,"stdin") == 0) {
			console = stdin;
		} else if (strcmp(name,"stdout") == 0) {
			console = stdout;
		} else if (strcmp(name,"stderr") == 0) {
			console = stderr;
		}

		if (console != -1) {
			if (argc < 3) {		/* Cannot delete it! */
				printf("Can't delete \"%s\"\n", name);
				return 1;
			}

			/* Try assigning specified device */
			if (console_assign (console, argv[2]) < 0)
				return 1;

#ifdef CONFIG_SERIAL_MULTI
			if (serial_assign (argv[2]) < 0)
				return 1;
#endif
		}

		/*
		 * Switch to new baudrate if new baudrate is supported
		 */
		if (strcmp(argv[1],"baudrate") == 0) {
			int baudrate = simple_strtoul(argv[2], NULL, 10);
			int i;
			for (i=0; i<N_BAUDRATES; ++i) {
				if (baudrate == baudrate_table[i])
					break;
			}
			if (i == N_BAUDRATES) {
				printf ("## Baudrate %d bps not supported\n",
					baudrate);
				return 1;
			}
			printf ("## Switch baudrate to %d bps and press ENTER ...\n",
				baudrate);
			udelay(50000);
			gd->baudrate = baudrate;
#ifdef CONFIG_PPC
			gd->bd->bi_baudrate = baudrate;
#endif

			serial_setbrg ();
			udelay(50000);
			for (;;) {
				if (getc() == '\r')
				      break;
			}
		}

		if (*++nxt == '\0') {
			if (env > env_data) {
				env--;
			} else {
				*env = '\0';
			}
		} else {
			for (;;) {
				*env = *nxt++;
				if ((*env == '\0') && (*nxt == '\0'))
					break;
				++env;
			}
		}
		*++env = '\0';
	}

#ifdef CONFIG_NET_MULTI
	if (strncmp(name, "eth", 3) == 0) {
		char *end;
		int   num = simple_strtoul(name+3, &end, 10);

		if (strcmp(end, "addr") == 0) {
			eth_set_enetaddr(num, argv[2]);
		}
	}
#endif


	/* Delete only ? */
	if ((argc < 3) || argv[2] == NULL) {
		env_crc_update ();
		return 0;
	}

	/*
	 * Append new definition at the end
	 */
	for (env=env_data; *env || *(env+1); ++env)
		;
	if (env > env_data)
		++env;
	/*
	 * Overflow when:
	 * "name" + "=" + "val" +"\0\0"  > ENV_SIZE - (env-env_data)
	 */
	len = strlen(name) + 2;
	/* add '=' for first arg, ' ' for all others */
	for (i=2; i<argc; ++i) {
		len += strlen(argv[i]) + 1;
	}
	if (len > (&env_data[ENV_SIZE]-env)) {
		printf ("## Error: environment overflow, \"%s\" deleted\n", name);
		return 1;
	}
	while ((*env = *name++) != '\0')
		env++;
	for (i=2; i<argc; ++i) {
		char *val = argv[i];

		*env = (i==2) ? '=' : ' ';
		while ((*++env = *val++) != '\0')
			;
	}

	/* end is marked with double '\0' */
	*++env = '\0';

	/* Update CRC */
	env_crc_update ();

	/*
	 * Some variables should be updated when the corresponding
	 * entry in the enviornment is changed
	 */

	if (strcmp(argv[1],"ethaddr") == 0) {
		char *s = argv[2];	/* always use only one arg */
		char *e;
		for (i=0; i<6; ++i) {
			bd->bi_enetaddr[i] = s ? simple_strtoul(s, &e, 16) : 0;
			if (s) s = (*e) ? e+1 : e;
		}
#ifdef CONFIG_NET_MULTI
		eth_set_enetaddr(0, argv[2]);
#endif
		return 0;
	}

	if (strcmp(argv[1],"ipaddr") == 0) {
		char *s = argv[2];	/* always use only one arg */
		char *e;
		unsigned long addr;
		bd->bi_ip_addr = 0;
		for (addr=0, i=0; i<4; ++i) {
			ulong val = s ? simple_strtoul(s, &e, 10) : 0;
			addr <<= 8;
			addr  |= (val & 0xFF);
			if (s) s = (*e) ? e+1 : e;
		}
		bd->bi_ip_addr = htonl(addr);
		return 0;
	}
	if (strcmp(argv[1],"loadaddr") == 0) {
		load_addr = simple_strtoul(argv[2], NULL, 16);
		return 0;
	}
#if (CONFIG_COMMANDS & CFG_CMD_NET)
	if (strcmp(argv[1],"bootfile") == 0) {
		copy_filename (BootFile, argv[2], sizeof(BootFile));
		return 0;
	}
#endif	/* CFG_CMD_NET */

#ifdef CONFIG_AMIGAONEG3SE
	if (strcmp(argv[1], "vga_fg_color") == 0 ||
	    strcmp(argv[1], "vga_bg_color") == 0 ) {
		extern void video_set_color(unsigned char attr);
		extern unsigned char video_get_attr(void);

		video_set_color(video_get_attr());
		return 0;
	}
#endif	/* CONFIG_AMIGAONEG3SE */

	return 0;
}

void setenv (char *varname, char *varvalue)
{
	char *argv[4] = { "setenv", varname, varvalue, NULL };
	_do_setenv (0, 3, argv);
}
#endif



#if 0
int do_setenv ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
	if (argc < 2) {
		printf ("Usage:\n%s\n", cmdtp->usage);
		return 1;
	}

	return _do_setenv (flag, argc, argv);
}
#endif


#include <errno.h>

/*
 * This variable is incremented on each do_env_set(), so it can
 * be used via get_env_id() as an indication, if the environment
 * has changed or not. So it is possible to reread an environment
 * variable only if the environment was changed ... done so for
 * example in NetInitLoop()
 */
static int env_id = 1;


/*
 * Set a new environment variable,
 * or replace or delete an existing one.
 */
int _do_env_set(int flag, int argc, char * const argv[])
{
	bd_t  *bd = gd->bd;
	int   i, len;
	int   console = -1;
	char  *name, *value, *s;
	ENTRY e, *ep;    
    int ret;
    size_t xlen;
    uchar *base64val=NULL;

	name = argv[1];

	if (strchr(name, '=')) {
		printf("## Error: illegal character '=' in variable name"
		       "\"%s\"\n", name);
		return 1;
	}

	env_id++;
	/*
	 * search if variable with this name already exists
	 */
	e.key = name;
	e.data = NULL;
	hsearch_r(e, FIND, &ep, &env_htab);

	/* Check for console redirection */
	if (strcmp(name, "stdin") == 0)
		console = stdin;
	else if (strcmp(name, "stdout") == 0)
		console = stdout;
	else if (strcmp(name, "stderr") == 0)
		console = stderr;

	if (console != -1) {
		if (argc < 3) {		/* Cannot delete it! */
			printf("Can't delete \"%s\"\n", name);
			return 1;
		}

#ifdef CONFIG_CONSOLE_MUX
		i = iomux_doenv(console, argv[2]);
		if (i)
			return i;
#else
		/* Try assigning specified device */
		if (console_assign(console, argv[2]) < 0)
			return 1;

#ifdef CONFIG_SERIAL_MULTI
		if (serial_assign(argv[2]) < 0)
			return 1;
#endif
#endif /* CONFIG_CONSOLE_MUX */
	}

	/*
	 * Some variables like "ethaddr" and "serial#" can be set only
	 * once and cannot be deleted; also, "ver" is readonly.
	 */
	if (ep) {		/* variable exists */
#ifndef CONFIG_ENV_OVERWRITE
		if (strcmp(name, "serial#") == 0 ||
		    (strcmp(name, "ethaddr") == 0
#if defined(CONFIG_OVERWRITE_ETHADDR_ONCE) && defined(CONFIG_ETHADDR)
		     && strcmp(ep->data, MK_STR(CONFIG_ETHADDR)) != 0
#endif	/* CONFIG_OVERWRITE_ETHADDR_ONCE && CONFIG_ETHADDR */
			)) {
			printf("Can't overwrite \"%s\"\n", name);
			return 1;
		}
#endif
        if(strncmp(name, "otp.", 4)==0){
            printf("OTP can't overwrite \"%s\"\n", name);
			return 1;
        }
        
		/*
		 * Switch to new baudrate if new baudrate is supported
		 */
		if (strcmp(name, "baudrate") == 0) {
			int baudrate = simple_strtoul(argv[2], NULL, 10);
			int i;
			for (i = 0; i < N_BAUDRATES; ++i) {
				if (baudrate == baudrate_table[i])
					break;
			}
			if (i == N_BAUDRATES) {
				printf("## Baudrate %d bps not supported\n",
					baudrate);
				return 1;
			}
			printf("## Switch baudrate to %d bps and"
			       "press ENTER ...\n", baudrate);
			udelay(50000);
			gd->baudrate = baudrate;
#if defined(CONFIG_PPC) || defined(CONFIG_MCF52x2)
			gd->bd->bi_baudrate = baudrate;
#endif

			serial_setbrg();
			udelay(50000);
			while (getc() != '\r')
				;
		}
	}

	/* Delete only ? */
	if (argc < 3 || argv[2] == NULL) {
		int rc = hdelete_r(name, &env_htab);
		return !rc;
	}

	/*
	 * Insert / replace new value
	 */
	for (i = 2, len = 0; i < argc; ++i)
		len += strlen(argv[i]) + 1;

	value = malloc(len);
	if (value == NULL) {
		printf("## Can't malloc %d bytes\n", len);
		return 1;
	}
	for (i = 2, s = value; i < argc; ++i) {
		char *v = argv[i];

		while ((*s++ = *v++) != '\0')
			;
		*(s - 1) = ' ';
	}
	if (s != value)
		*--s = '\0';

	e.key	= name;
	e.data	= value;    
    if(strncmp(name,"otp.sec.",8)==0){ 
        xlen = ((len + 15) / 16) * 16;
        xlen = (xlen << 3) / 6 +4;
        base64val = malloc(xlen);
        if(!base64val){
            free(value);
            printf("## Can't malloc %d bytes\n", xlen);
		    return 1;
        }
        memset(base64val, 0x00, xlen);
        ret = otp_sec_encode(value, len, base64val, &xlen);
        if(ret){
            printf("## Warning otp secure encode failed ##\n");
            free(value);
            free(base64val);
            return 1;
        }else{        
            e.data = base64val;
        }
    }

	hsearch_r(e, ENTER, &ep, &env_htab);
    
	free(value);
    if(base64val)
        free(base64val);
	if (!ep) {
		printf("## Error inserting \"%s\" variable, errno=%d\n",
			name, errno);
		return 1;
	}

	/*
	 * Some variables should be updated when the corresponding
	 * entry in the environment is changed
	 */
	if (strcmp(name, "ipaddr") == 0) {
		char *s = argv[2];	/* always use only one arg */
		char *e;
		unsigned long addr;
		bd->bi_ip_addr = 0;
		for (addr = 0, i = 0; i < 4; ++i) {
			ulong val = s ? simple_strtoul(s, &e, 10) : 0;
			addr <<= 8;
			addr  |= val & 0xFF;
			if (s)
				s = *e ? e + 1 : e;
		}
		bd->bi_ip_addr = htonl(addr);
		return 0;
	} else if (strcmp(argv[1], "loadaddr") == 0) {
		load_addr = simple_strtoul(argv[2], NULL, 16);
		return 0;
	}
#if (CONFIG_COMMANDS & CFG_CMD_NET)
	else if (strcmp(argv[1], "bootfile") == 0) {
		copy_filename(BootFile, argv[2], sizeof(BootFile));
		return 0;
	}
#endif
	return 0;
}

int setenv(char *varname, char *varvalue)
{
	const char * const argv[4] = { "setenv", varname, varvalue, NULL };

	if (varvalue == NULL || varvalue[0] == '\0')
		return _do_env_set(0, 2, (char * const *)argv);
	else
		return _do_env_set(0, 3, (char * const *)argv);
}


int do_setenv(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	if (argc < 2)
		return 1;

	return _do_env_set(flag, argc, argv);
}

/*============*/

/************************************************************************
 * Prompt for environment variable
 */

#if (CONFIG_COMMANDS & CFG_CMD_ASKENV)
int do_askenv ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
	extern char console_buffer[CFG_CBSIZE];
	char message[CFG_CBSIZE];
	int size = CFG_CBSIZE - 1;
	int len;
	char *local_args[4];

	local_args[0] = argv[0];
	local_args[1] = argv[1];
	local_args[2] = NULL;
	local_args[3] = NULL;

	if (argc < 2) {
		printf ("Usage:\n%s\n", cmdtp->usage);
		return 1;
	}
	/* Check the syntax */
	switch (argc) {
	case 1:
		printf ("Usage:\n%s\n", cmdtp->usage);
		return 1;

	case 2:		/* askenv envname */
		sprintf (message, "Please enter '%s':", argv[1]);
		break;

	case 3:		/* askenv envname size */
		sprintf (message, "Please enter '%s':", argv[1]);
		size = simple_strtoul (argv[2], NULL, 10);
		break;

	default:	/* askenv envname message1 ... messagen size */
	    {
		int i;
		int pos = 0;

		for (i = 2; i < argc - 1; i++) {
			if (pos) {
				message[pos++] = ' ';
			}
			strcpy (message+pos, argv[i]);
			pos += strlen(argv[i]);
		}
		message[pos] = '\0';
		size = simple_strtoul (argv[argc - 1], NULL, 10);
	    }
		break;
	}

	if (size >= CFG_CBSIZE)
		size = CFG_CBSIZE - 1;

	if (size <= 0)
		return 1;

	/* prompt for input */
	len = readline (message);

	if (size < len)
		console_buffer[size] = '\0';

	len = 2;
	if (console_buffer[0] != '\0') {
		local_args[2] = console_buffer;
		len = 3;
	}

	/* Continue calling setenv code */
	return _do_setenv (flag, len, local_args);
}
#endif	/* CFG_CMD_ASKENV */

/************************************************************************
 * Look up variable from environment,
 * return address of storage for that variable,
 * or NULL if not found
 */
#if 0
char *getenv (char *name)
{
	int i, nxt;

	WATCHDOG_RESET();

	for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
		int val;

		for (nxt=i; env_get_char(nxt) != '\0'; ++nxt) {
			if (nxt >= CFG_ENV_SIZE) {
				return (NULL);
			}
		}
		if ((val=envmatch((uchar *)name, i)) < 0)
			continue;
		return ((char *)env_get_addr(val));
	}

	return (NULL);
}
#endif

/*
 * Look up variable from environment for restricted C runtime env.
 */
int getenv_f(const char *name, char *buf, unsigned len)
{
	int i, nxt;

	for (i = 0; env_get_char(i) != '\0'; i = nxt + 1) {
		int val, n;

		for (nxt = i; env_get_char(nxt) != '\0'; ++nxt) {
			if (nxt >= CFG_ENV_SIZE)
				return -1;
		}

		val = envmatch((uchar *)name, i);
		if (val < 0)
			continue;

		/* found; copy out */
		for (n = 0; n < len; ++n, ++buf) {
			*buf = env_get_char(val++);
			if (*buf == '\0')
				return n;
		}

		if (n)
			*--buf = '\0';

		printf("env_buf [%d bytes] too small for value of \"%s\"\n",
			len, name);

		return n;
	}

	return -1;
}


char *getenv(char *name)
{

	if (gd->flags & GD_FLG_ENV_READY) { /* after import into hashtable */
		ENTRY e, *ep;

		WATCHDOG_RESET();

		e.key	= name;
		e.data	= NULL;
		hsearch_r(e, FIND, &ep, &env_htab);

		return ep ? ep->data : NULL;
	}

	/* restricted capabilities before import */
	if (getenv_f(name, (char *)(gd->env_buf), sizeof(gd->env_buf)) > 0)
		return (char *)(gd->env_buf);

	return NULL;
}


int getenv_r (char *name, char *buf, unsigned len)
{
	int i, nxt;

	for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
		int val, n;

		for (nxt=i; env_get_char(nxt) != '\0'; ++nxt) {
			if (nxt >= CFG_ENV_SIZE) {
				return (-1);
			}
		}
		if ((val=envmatch((uchar *)name, i)) < 0)
			continue;
		/* found; copy out */
		n = 0;
		while ((len > n++) && (*buf++ = env_get_char(val++)) != '\0')
			;
		if (len == n)
			*buf = '\0';
		return (n);
	}
	return (-1);
}

#if defined(CFG_ENV_IS_IN_NVRAM) || defined(CFG_ENV_IS_IN_EEPROM) || \
    ((CONFIG_COMMANDS & (CFG_CMD_ENV|CFG_CMD_FLASH)) == \
      (CFG_CMD_ENV|CFG_CMD_FLASH)) || \
     ((CONFIG_COMMANDS & (CFG_CMD_ENV|CFG_CMD_NAND)) == \
      (CFG_CMD_ENV|CFG_CMD_NAND))
int do_saveenv (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
	extern char * env_name_spec;

	printf ("Saving Environment to %s...\n", env_name_spec);
	return (saveenv() ? 1 : 0);
}


#endif


/************************************************************************
 * Match a name / name=value pair
 *
 * s1 is either a simple 'name', or a 'name=value' pair.
 * i2 is the environment index for a 'name2=value2' pair.
 * If the names match, return the index for the value2, else NULL.
 */

static int
envmatch (uchar *s1, int i2)
{

	while (*s1 == env_get_char(i2++))
		if (*s1++ == '=')
			return(i2);
	if (*s1 == '\0' && env_get_char(i2-1) == '=')
		return(i2);
	return(-1);
}


/**************************************************/

U_BOOT_CMD(
	printenv, CFG_MAXARGS, 1,	do_printenv,
	"printenv- print environment variables\n",
	"\n    - print values of all environment variables\n"
	"printenv name ...\n"
	"    - print value of environment variable 'name'\n"
);

U_BOOT_CMD(
	setenv, CFG_MAXARGS, 0,	do_setenv,
	"setenv  - set environment variables\n",
	"name value ...\n"
	"    - set environment variable 'name' to 'value ...'\n"
	"setenv name\n"
	"    - delete environment variable 'name'\n"
);

#if defined(CFG_ENV_IS_IN_NVRAM) || defined(CFG_ENV_IS_IN_EEPROM) || \
    ((CONFIG_COMMANDS & (CFG_CMD_ENV|CFG_CMD_FLASH)) == \
      (CFG_CMD_ENV|CFG_CMD_FLASH))
U_BOOT_CMD(
	saveenv, 1, 0,	do_saveenv,
	"saveenv - save environment variables to persistent storage\n",
	NULL
);

#endif	/* CFG_CMD_ENV */

#if (CONFIG_COMMANDS & CFG_CMD_ASKENV)

U_BOOT_CMD(
	askenv,	CFG_MAXARGS,	1,	do_askenv,
	"askenv  - get environment variables from stdin\n",
	"name [message] [size]\n"
	"    - get environment variable 'name' from stdin (max 'size' chars)\n"
	"askenv name\n"
	"    - get environment variable 'name' from stdin\n"
	"askenv name size\n"
	"    - get environment variable 'name' from stdin (max 'size' chars)\n"
	"askenv name [message] size\n"
	"    - display 'message' string and get environment variable 'name'"
	"from stdin (max 'size' chars)\n"
);
#endif	/* CFG_CMD_ASKENV */

#if (CONFIG_COMMANDS & CFG_CMD_RUN)
int do_run (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
U_BOOT_CMD(
	run,	CFG_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  /* CFG_CMD_RUN */