[people/ms/u-boot.git] / common / env_flash.c

/*
 * (C) Copyright 2000-2010
 * 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
 */

/* #define DEBUG */

#include <common.h>
#include <command.h>
#include <environment.h>
#include <linux/stddef.h>
#include <malloc.h>
#include <search.h>
#include <errno.h>

DECLARE_GLOBAL_DATA_PTR;

#if defined(CONFIG_CMD_SAVEENV) && defined(CONFIG_CMD_FLASH)
#define CMD_SAVEENV
#elif defined(CONFIG_ENV_ADDR_REDUND)
#error Cannot use CONFIG_ENV_ADDR_REDUND without CONFIG_CMD_SAVEENV & CONFIG_CMD_FLASH
#endif

#if defined(CONFIG_ENV_SIZE_REDUND) && (CONFIG_ENV_SIZE_REDUND < CONFIG_ENV_SIZE)
#error CONFIG_ENV_SIZE_REDUND should not be less then CONFIG_ENV_SIZE
#endif

char * env_name_spec = "Flash";

#ifdef ENV_IS_EMBEDDED

extern uchar environment[];
env_t *env_ptr = (env_t *)(&environment[0]);

static env_t *flash_addr = (env_t *)CONFIG_ENV_ADDR;

#else /* ! ENV_IS_EMBEDDED */

env_t *env_ptr = (env_t *)CONFIG_ENV_ADDR;
static env_t *flash_addr = (env_t *)CONFIG_ENV_ADDR;

#endif /* ENV_IS_EMBEDDED */

#if defined(CMD_SAVEENV) || defined(CONFIG_ENV_ADDR_REDUND)
/* CONFIG_ENV_ADDR is supposed to be on sector boundary */
static ulong end_addr = CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1;
#endif

#ifdef CONFIG_ENV_ADDR_REDUND
static env_t *flash_addr_new = (env_t *)CONFIG_ENV_ADDR_REDUND;

/* CONFIG_ENV_ADDR_REDUND is supposed to be on sector boundary */
static ulong end_addr_new = CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1;
#endif /* CONFIG_ENV_ADDR_REDUND */

extern uchar default_environment[];


uchar env_get_char_spec(int index)
{
	return (*((uchar *)(gd->env_addr + index)));
}

#ifdef CONFIG_ENV_ADDR_REDUND

int  env_init(void)
{
	int crc1_ok = 0, crc2_ok = 0;

	uchar flag1 = flash_addr->flags;
	uchar flag2 = flash_addr_new->flags;

	ulong addr_default = (ulong)&default_environment[0];
	ulong addr1 = (ulong)&(flash_addr->data);
	ulong addr2 = (ulong)&(flash_addr_new->data);

	crc1_ok = (crc32(0, flash_addr->data, ENV_SIZE) == flash_addr->crc);
	crc2_ok = (crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc);

	if (crc1_ok && ! crc2_ok) {
		gd->env_addr  = addr1;
		gd->env_valid = 1;
	} else if (! crc1_ok && crc2_ok) {
		gd->env_addr  = addr2;
		gd->env_valid = 1;
	} else if (! crc1_ok && ! crc2_ok) {
		gd->env_addr  = addr_default;
		gd->env_valid = 0;
	} else if (flag1 == ACTIVE_FLAG && flag2 == OBSOLETE_FLAG) {
		gd->env_addr  = addr1;
		gd->env_valid = 1;
	} else if (flag1 == OBSOLETE_FLAG && flag2 == ACTIVE_FLAG) {
		gd->env_addr  = addr2;
		gd->env_valid = 1;
	} else if (flag1 == flag2) {
		gd->env_addr  = addr1;
		gd->env_valid = 2;
	} else if (flag1 == 0xFF) {
		gd->env_addr  = addr1;
		gd->env_valid = 2;
	} else if (flag2 == 0xFF) {
		gd->env_addr  = addr2;
		gd->env_valid = 2;
	}

	return 0;
}

#ifdef CMD_SAVEENV
int saveenv(void)
{
	env_t	env_new;
	ssize_t	len;
	char	*saved_data = NULL;
	char	*res;
	int	rc = 1;
	char	flag = OBSOLETE_FLAG, new_flag = ACTIVE_FLAG;
#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
	ulong	up_data = 0;
#endif

	debug("Protect off %08lX ... %08lX\n",
		(ulong)flash_addr, end_addr);

	if (flash_sect_protect(0, (ulong)flash_addr, end_addr)) {
		goto done;
	}

	debug("Protect off %08lX ... %08lX\n",
		(ulong)flash_addr_new, end_addr_new);

	if (flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new)) {
		goto done;
	}

	res = (char *)&env_new.data;
	len = hexport_r(&env_htab, '\0', &res, ENV_SIZE);
	if (len < 0) {
		error("Cannot export environment: errno = %d\n", errno);
		goto done;
	}
	env_new.crc   = crc32(0, env_new.data, ENV_SIZE);
	env_new.flags = new_flag;

#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
	up_data = (end_addr_new + 1 - ((long)flash_addr_new + CONFIG_ENV_SIZE));
	debug("Data to save 0x%lX\n", up_data);
	if (up_data) {
		if ((saved_data = malloc(up_data)) == NULL) {
			printf("Unable to save the rest of sector (%ld)\n",
				up_data);
			goto done;
		}
		memcpy(saved_data,
			(void *)((long)flash_addr_new + CONFIG_ENV_SIZE), up_data);
		debug("Data (start 0x%lX, len 0x%lX) saved at 0x%p\n",
			(long)flash_addr_new + CONFIG_ENV_SIZE,
			up_data, saved_data);
	}
#endif
	puts("Erasing Flash...");
	debug(" %08lX ... %08lX ...",
		(ulong)flash_addr_new, end_addr_new);

	if (flash_sect_erase((ulong)flash_addr_new, end_addr_new)) {
		goto done;
	}

	puts("Writing to Flash... ");
	debug(" %08lX ... %08lX ...",
		(ulong)&(flash_addr_new->data),
		sizeof(env_ptr->data)+(ulong)&(flash_addr_new->data));
	if ((rc = flash_write((char *)&env_new,
			(ulong)flash_addr_new,
			sizeof(env_new))) ||
	    (rc = flash_write(&flag,
			(ulong)&(flash_addr->flags),
			sizeof(flash_addr->flags))) ) {
		flash_perror(rc);
		goto done;
	}

#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
	if (up_data) { /* restore the rest of sector */
		debug("Restoring the rest of data to 0x%lX len 0x%lX\n",
			(long)flash_addr_new + CONFIG_ENV_SIZE, up_data);
		if (flash_write(saved_data,
				(long)flash_addr_new + CONFIG_ENV_SIZE,
				up_data)) {
			flash_perror(rc);
			goto done;
		}
	}
#endif
	puts("done\n");

	{
		env_t * etmp = flash_addr;
		ulong ltmp = end_addr;

		flash_addr = flash_addr_new;
		flash_addr_new = etmp;

		end_addr = end_addr_new;
		end_addr_new = ltmp;
	}

	rc = 0;
done:
	if (saved_data)
		free(saved_data);
	/* try to re-protect */
	(void) flash_sect_protect(1, (ulong)flash_addr, end_addr);
	(void) flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);

	return rc;
}
#endif /* CMD_SAVEENV */

#else /* ! CONFIG_ENV_ADDR_REDUND */

int  env_init(void)
{
	if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
		gd->env_addr  = (ulong)&(env_ptr->data);
		gd->env_valid = 1;
		return(0);
	}

	gd->env_addr  = (ulong)&default_environment[0];
	gd->env_valid = 0;
	return 0;
}

#ifdef CMD_SAVEENV

int saveenv(void)
{
	env_t	env_new;
	ssize_t	len;
	int	rc = 1;
	char	*res;
	char	*saved_data = NULL;
#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
	ulong	up_data = 0;

	up_data = (end_addr + 1 - ((long)flash_addr + CONFIG_ENV_SIZE));
	debug("Data to save 0x%lx\n", up_data);
	if (up_data) {
		if ((saved_data = malloc(up_data)) == NULL) {
			printf("Unable to save the rest of sector (%ld)\n",
				up_data);
			goto done;
		}
		memcpy(saved_data,
			(void *)((long)flash_addr + CONFIG_ENV_SIZE), up_data);
		debug("Data (start 0x%lx, len 0x%lx) saved at 0x%lx\n",
			(ulong)flash_addr + CONFIG_ENV_SIZE,
			up_data,
			(ulong)saved_data);
	}
#endif	/* CONFIG_ENV_SECT_SIZE */

	debug("Protect off %08lX ... %08lX\n",
		(ulong)flash_addr, end_addr);

	if (flash_sect_protect(0, (long)flash_addr, end_addr))
		goto done;

	res = (char *)&env_new.data;
	len = hexport_r(&env_htab, '\0', &res, ENV_SIZE);
	if (len < 0) {
		error("Cannot export environment: errno = %d\n", errno);
		goto done;
	}
	env_new.crc = crc32(0, env_new.data, ENV_SIZE);

	puts("Erasing Flash...");
	if (flash_sect_erase((long)flash_addr, end_addr))
		goto done;

	puts("Writing to Flash... ");
	rc = flash_write((char *)&env_new, (long)flash_addr, CONFIG_ENV_SIZE);
	if (rc != 0) {
		flash_perror(rc);
		goto done;
	}
#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
	if (up_data) {	/* restore the rest of sector */
		debug("Restoring the rest of data to 0x%lx len 0x%lx\n",
			(ulong)flash_addr + CONFIG_ENV_SIZE, up_data);
		if (flash_write(saved_data,
				(long)flash_addr + CONFIG_ENV_SIZE,
				up_data)) {
			flash_perror(rc);
			goto done;
		}
	}
#endif
	puts("done\n");
	rc = 0;
done:
	if (saved_data)
		free(saved_data);
	/* try to re-protect */
	(void) flash_sect_protect(1, (long)flash_addr, end_addr);
	return rc;
}

#endif /* CMD_SAVEENV */

#endif /* CONFIG_ENV_ADDR_REDUND */

void env_relocate_spec(void)
{
#ifdef CONFIG_ENV_ADDR_REDUND
	if (gd->env_addr != (ulong)&(flash_addr->data)) {
		env_t *etmp = flash_addr;
		ulong ltmp = end_addr;

		flash_addr = flash_addr_new;
		flash_addr_new = etmp;

		end_addr = end_addr_new;
		end_addr_new = ltmp;
	}

	if (flash_addr_new->flags != OBSOLETE_FLAG &&
	    crc32(0, flash_addr_new->data, ENV_SIZE) ==
	    flash_addr_new->crc) {
		char flag = OBSOLETE_FLAG;

		gd->env_valid = 2;
		flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new);
		flash_write(&flag,
			    (ulong)&(flash_addr_new->flags),
			    sizeof(flash_addr_new->flags));
		flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);
	}

	if (flash_addr->flags != ACTIVE_FLAG &&
	    (flash_addr->flags & ACTIVE_FLAG) == ACTIVE_FLAG) {
		char flag = ACTIVE_FLAG;

		gd->env_valid = 2;
		flash_sect_protect(0, (ulong)flash_addr, end_addr);
		flash_write(&flag,
			    (ulong)&(flash_addr->flags),
			    sizeof(flash_addr->flags));
		flash_sect_protect(1, (ulong)flash_addr, end_addr);
	}

	if (gd->env_valid == 2)
		puts ("*** Warning - some problems detected "
		      "reading environment; recovered successfully\n\n");
#endif /* CONFIG_ENV_ADDR_REDUND */

	env_import((char *)flash_addr, 1);
}
Commit	Line	Data
c609719b	1	/*
ea882baf	2	* (C) Copyright 2000-2010
c609719b WD	3	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	4	*
	5	* (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
	6	* Andreas Heppel <aheppel@sysgo.de>
	7
	8	* See file CREDITS for list of people who contributed to this
	9	* project.
	10	*
	11	* This program is free software; you can redistribute it and/or
	12	* modify it under the terms of the GNU General Public License as
	13	* published by the Free Software Foundation; either version 2 of
	14	* the License, or (at your option) any later version.
	15	*
	16	* This program is distributed in the hope that it will be useful,
	17	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	18	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	19	* GNU General Public License for more details.
	20	*
	21	* You should have received a copy of the GNU General Public License
	22	* along with this program; if not, write to the Free Software
	23	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	24	* MA 02111-1307 USA
	25	*/
	26
	27	/* #define DEBUG */
	28
	29	#include <common.h>
c609719b WD	30	#include <command.h>
c609719b WD	31	#include <environment.h>
c609719b	32	#include <linux/stddef.h>
47cd00fa	33	#include <malloc.h>
ea882baf WD	34	#include <search.h>
ea882baf WD	35	#include <errno.h>
c609719b	36
d87080b7 WD	37	DECLARE_GLOBAL_DATA_PTR;
d87080b7 WD	38
bdab39d3	39	#if defined(CONFIG_CMD_SAVEENV) && defined(CONFIG_CMD_FLASH)
c609719b	40	#define CMD_SAVEENV
0e8d1586	41	#elif defined(CONFIG_ENV_ADDR_REDUND)
bdab39d3	42	#error Cannot use CONFIG_ENV_ADDR_REDUND without CONFIG_CMD_SAVEENV & CONFIG_CMD_FLASH
c609719b WD	43	#endif
c609719b WD	44
0e8d1586 JCPV	45	#if defined(CONFIG_ENV_SIZE_REDUND) && (CONFIG_ENV_SIZE_REDUND < CONFIG_ENV_SIZE)
0e8d1586 JCPV	46	#error CONFIG_ENV_SIZE_REDUND should not be less then CONFIG_ENV_SIZE
c609719b WD	47	#endif
c609719b WD	48
c609719b WD	49	char * env_name_spec = "Flash";
	50
	51	#ifdef ENV_IS_EMBEDDED
	52
	53	extern uchar environment[];
	54	env_t env_ptr = (env_t )(&environment[0]);
	55
0e8d1586	56	static env_t flash_addr = (env_t )CONFIG_ENV_ADDR;
c609719b WD	57
	58	#else /* ! ENV_IS_EMBEDDED */
	59
0e8d1586	60	env_t env_ptr = (env_t )CONFIG_ENV_ADDR;
0e8d1586	61	static env_t flash_addr = (env_t )CONFIG_ENV_ADDR;
c609719b WD	62
	63	#endif /* ENV_IS_EMBEDDED */
	64
ea882baf WD	65	#if defined(CMD_SAVEENV) \|\| defined(CONFIG_ENV_ADDR_REDUND)
	66	/* CONFIG_ENV_ADDR is supposed to be on sector boundary */
	67	static ulong end_addr = CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1;
	68	#endif
	69
0e8d1586 JCPV	70	#ifdef CONFIG_ENV_ADDR_REDUND
0e8d1586 JCPV	71	static env_t flash_addr_new = (env_t )CONFIG_ENV_ADDR_REDUND;
c609719b	72
ea882baf	73	/* CONFIG_ENV_ADDR_REDUND is supposed to be on sector boundary */
0e8d1586	74	static ulong end_addr_new = CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1;
0e8d1586	75	#endif /* CONFIG_ENV_ADDR_REDUND */
c609719b WD	76
c609719b WD	77	extern uchar default_environment[];
c609719b WD	78
c609719b WD	79
ea882baf	80	uchar env_get_char_spec(int index)
c609719b	81	{
ea882baf	82	return (((uchar )(gd->env_addr + index)));
c609719b WD	83	}
c609719b WD	84
0e8d1586	85	#ifdef CONFIG_ENV_ADDR_REDUND
c609719b WD	86
	87	int env_init(void)
	88	{
8ed96046	89	int crc1_ok = 0, crc2_ok = 0;
c609719b WD	90
	91	uchar flag1 = flash_addr->flags;
	92	uchar flag2 = flash_addr_new->flags;
	93
	94	ulong addr_default = (ulong)&default_environment[0];
	95	ulong addr1 = (ulong)&(flash_addr->data);
	96	ulong addr2 = (ulong)&(flash_addr_new->data);
	97
8ed96046 WD	98	crc1_ok = (crc32(0, flash_addr->data, ENV_SIZE) == flash_addr->crc);
	99	crc2_ok = (crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc);
	100
c3f9d493	101	if (crc1_ok && ! crc2_ok) {
c609719b WD	102	gd->env_addr = addr1;
c609719b WD	103	gd->env_valid = 1;
c3f9d493	104	} else if (! crc1_ok && crc2_ok) {
c609719b WD	105	gd->env_addr = addr2;
c609719b WD	106	gd->env_valid = 1;
c3f9d493	107	} else if (! crc1_ok && ! crc2_ok) {
c609719b WD	108	gd->env_addr = addr_default;
c609719b WD	109	gd->env_valid = 0;
c3f9d493	110	} else if (flag1 == ACTIVE_FLAG && flag2 == OBSOLETE_FLAG) {
c609719b WD	111	gd->env_addr = addr1;
c609719b WD	112	gd->env_valid = 1;
c3f9d493	113	} else if (flag1 == OBSOLETE_FLAG && flag2 == ACTIVE_FLAG) {
c609719b WD	114	gd->env_addr = addr2;
c609719b WD	115	gd->env_valid = 1;
c3f9d493	116	} else if (flag1 == flag2) {
c609719b WD	117	gd->env_addr = addr1;
c609719b WD	118	gd->env_valid = 2;
c3f9d493	119	} else if (flag1 == 0xFF) {
c609719b WD	120	gd->env_addr = addr1;
c609719b WD	121	gd->env_valid = 2;
c3f9d493	122	} else if (flag2 == 0xFF) {
c609719b WD	123	gd->env_addr = addr2;
	124	gd->env_valid = 2;
	125	}
	126
ea882baf	127	return 0;
c609719b WD	128	}
	129
	130	#ifdef CMD_SAVEENV
	131	int saveenv(void)
	132	{
ea882baf WD	133	env_t env_new;
	134	ssize_t len;
	135	char *saved_data = NULL;
	136	char *res;
	137	int rc = 1;
	138	char flag = OBSOLETE_FLAG, new_flag = ACTIVE_FLAG;
0e8d1586	139	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
ea882baf	140	ulong up_data = 0;
500545cc	141	#endif
c609719b	142
ea882baf	143	debug("Protect off %08lX ... %08lX\n",
c609719b WD	144	(ulong)flash_addr, end_addr);
c609719b WD	145
ea882baf WD	146	if (flash_sect_protect(0, (ulong)flash_addr, end_addr)) {
ea882baf WD	147	goto done;
c609719b WD	148	}
c609719b WD	149
ea882baf	150	debug("Protect off %08lX ... %08lX\n",
c609719b WD	151	(ulong)flash_addr_new, end_addr_new);
c609719b WD	152
ea882baf WD	153	if (flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new)) {
	154	goto done;
	155	}
	156
	157	res = (char *)&env_new.data;
2eb1573f	158	len = hexport_r(&env_htab, '\0', &res, ENV_SIZE);
ea882baf WD	159	if (len < 0) {
	160	error("Cannot export environment: errno = %d\n", errno);
	161	goto done;
c609719b	162	}
ea882baf WD	163	env_new.crc = crc32(0, env_new.data, ENV_SIZE);
ea882baf WD	164	env_new.flags = new_flag;
c609719b	165
0e8d1586 JCPV	166	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
0e8d1586 JCPV	167	up_data = (end_addr_new + 1 - ((long)flash_addr_new + CONFIG_ENV_SIZE));
ea882baf	168	debug("Data to save 0x%lX\n", up_data);
47cd00fa WD	169	if (up_data) {
47cd00fa WD	170	if ((saved_data = malloc(up_data)) == NULL) {
8bde7f77	171	printf("Unable to save the rest of sector (%ld)\n",
47cd00fa	172	up_data);
ea882baf	173	goto done;
47cd00fa	174	}
8bde7f77	175	memcpy(saved_data,
0e8d1586	176	(void *)((long)flash_addr_new + CONFIG_ENV_SIZE), up_data);
ea882baf WD	177	debug("Data (start 0x%lX, len 0x%lX) saved at 0x%p\n",
	178	(long)flash_addr_new + CONFIG_ENV_SIZE,
	179	up_data, saved_data);
47cd00fa WD	180	}
47cd00fa WD	181	#endif
ea882baf WD	182	puts("Erasing Flash...");
ea882baf WD	183	debug(" %08lX ... %08lX ...",
c609719b WD	184	(ulong)flash_addr_new, end_addr_new);
c609719b WD	185
ea882baf WD	186	if (flash_sect_erase((ulong)flash_addr_new, end_addr_new)) {
ea882baf WD	187	goto done;
c609719b WD	188	}
c609719b WD	189
ea882baf WD	190	puts("Writing to Flash... ");
ea882baf WD	191	debug(" %08lX ... %08lX ...",
c609719b WD	192	(ulong)&(flash_addr_new->data),
c609719b WD	193	sizeof(env_ptr->data)+(ulong)&(flash_addr_new->data));
ea882baf WD	194	if ((rc = flash_write((char *)&env_new,
	195	(ulong)flash_addr_new,
	196	sizeof(env_new))) \|\|
c3f9d493	197	(rc = flash_write(&flag,
8bde7f77	198	(ulong)&(flash_addr->flags),
ea882baf WD	199	sizeof(flash_addr->flags))) ) {
	200	flash_perror(rc);
	201	goto done;
c609719b	202	}
c609719b	203
0e8d1586	204	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
47cd00fa	205	if (up_data) { /* restore the rest of sector */
ea882baf WD	206	debug("Restoring the rest of data to 0x%lX len 0x%lX\n",
ea882baf WD	207	(long)flash_addr_new + CONFIG_ENV_SIZE, up_data);
8bde7f77	208	if (flash_write(saved_data,
0e8d1586	209	(long)flash_addr_new + CONFIG_ENV_SIZE,
47cd00fa WD	210	up_data)) {
47cd00fa WD	211	flash_perror(rc);
ea882baf	212	goto done;
47cd00fa WD	213	}
	214	}
	215	#endif
ea882baf WD	216	puts("done\n");
ea882baf WD	217
c609719b WD	218	{
	219	env_t * etmp = flash_addr;
	220	ulong ltmp = end_addr;
	221
	222	flash_addr = flash_addr_new;
	223	flash_addr_new = etmp;
	224
	225	end_addr = end_addr_new;
	226	end_addr_new = ltmp;
	227	}
	228
	229	rc = 0;
ea882baf	230	done:
47cd00fa	231	if (saved_data)
ea882baf	232	free(saved_data);
c609719b	233	/* try to re-protect */
ea882baf WD	234	(void) flash_sect_protect(1, (ulong)flash_addr, end_addr);
ea882baf WD	235	(void) flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);
c609719b WD	236
	237	return rc;
	238	}
	239	#endif /* CMD_SAVEENV */
	240
0e8d1586	241	#else /* ! CONFIG_ENV_ADDR_REDUND */
c609719b WD	242
	243	int env_init(void)
	244	{
c609719b WD	245	if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
	246	gd->env_addr = (ulong)&(env_ptr->data);
	247	gd->env_valid = 1;
8ed96046	248	return(0);
c609719b	249	}
9bb8b209	250
8ed96046 WD	251	gd->env_addr = (ulong)&default_environment[0];
8ed96046 WD	252	gd->env_valid = 0;
ea882baf	253	return 0;
c609719b WD	254	}
	255
	256	#ifdef CMD_SAVEENV
	257
	258	int saveenv(void)
	259	{
ea882baf WD	260	env_t env_new;
	261	ssize_t len;
	262	int rc = 1;
	263	char *res;
	264	char *saved_data = NULL;
	265	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
	266	ulong up_data = 0;
c609719b	267
ea882baf WD	268	up_data = (end_addr + 1 - ((long)flash_addr + CONFIG_ENV_SIZE));
	269	debug("Data to save 0x%lx\n", up_data);
	270	if (up_data) {
	271	if ((saved_data = malloc(up_data)) == NULL) {
	272	printf("Unable to save the rest of sector (%ld)\n",
	273	up_data);
	274	goto done;
	275	}
	276	memcpy(saved_data,
	277	(void *)((long)flash_addr + CONFIG_ENV_SIZE), up_data);
	278	debug("Data (start 0x%lx, len 0x%lx) saved at 0x%lx\n",
	279	(ulong)flash_addr + CONFIG_ENV_SIZE,
	280	up_data,
	281	(ulong)saved_data);
	282	}
0e8d1586	283	#endif /* CONFIG_ENV_SECT_SIZE */
c609719b	284
ea882baf WD	285	debug("Protect off %08lX ... %08lX\n",
ea882baf WD	286	(ulong)flash_addr, end_addr);
c609719b	287
ea882baf WD	288	if (flash_sect_protect(0, (long)flash_addr, end_addr))
ea882baf WD	289	goto done;
c609719b	290
ea882baf	291	res = (char *)&env_new.data;
2eb1573f	292	len = hexport_r(&env_htab, '\0', &res, ENV_SIZE);
ea882baf WD	293	if (len < 0) {
	294	error("Cannot export environment: errno = %d\n", errno);
	295	goto done;
	296	}
	297	env_new.crc = crc32(0, env_new.data, ENV_SIZE);
c609719b	298
ea882baf WD	299	puts("Erasing Flash...");
	300	if (flash_sect_erase((long)flash_addr, end_addr))
	301	goto done;
c609719b	302
ea882baf WD	303	puts("Writing to Flash... ");
ea882baf WD	304	rc = flash_write((char *)&env_new, (long)flash_addr, CONFIG_ENV_SIZE);
c609719b	305	if (rc != 0) {
ea882baf WD	306	flash_perror(rc);
ea882baf WD	307	goto done;
c609719b	308	}
ea882baf WD	309	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
	310	if (up_data) { /* restore the rest of sector */
	311	debug("Restoring the rest of data to 0x%lx len 0x%lx\n",
	312	(ulong)flash_addr + CONFIG_ENV_SIZE, up_data);
	313	if (flash_write(saved_data,
	314	(long)flash_addr + CONFIG_ENV_SIZE,
	315	up_data)) {
	316	flash_perror(rc);
	317	goto done;
	318	}
	319	}
	320	#endif
	321	puts("done\n");
	322	rc = 0;
	323	done:
	324	if (saved_data)
	325	free(saved_data);
c609719b	326	/* try to re-protect */
ea882baf WD	327	(void) flash_sect_protect(1, (long)flash_addr, end_addr);
ea882baf WD	328	return rc;
c609719b WD	329	}
	330
	331	#endif /* CMD_SAVEENV */
	332
0e8d1586	333	#endif /* CONFIG_ENV_ADDR_REDUND */
c609719b	334
ea882baf	335	void env_relocate_spec(void)
c609719b	336	{
0e8d1586	337	#ifdef CONFIG_ENV_ADDR_REDUND
c3f9d493	338	if (gd->env_addr != (ulong)&(flash_addr->data)) {
ea882baf	339	env_t *etmp = flash_addr;
c609719b WD	340	ulong ltmp = end_addr;
	341
	342	flash_addr = flash_addr_new;
	343	flash_addr_new = etmp;
	344
	345	end_addr = end_addr_new;
	346	end_addr_new = ltmp;
	347	}
	348
c3f9d493	349	if (flash_addr_new->flags != OBSOLETE_FLAG &&
c609719b	350	crc32(0, flash_addr_new->data, ENV_SIZE) ==
c3f9d493 WD	351	flash_addr_new->crc) {
	352	char flag = OBSOLETE_FLAG;
	353
c609719b	354	gd->env_valid = 2;
ea882baf	355	flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new);
c3f9d493	356	flash_write(&flag,
8bde7f77 WD	357	(ulong)&(flash_addr_new->flags),
8bde7f77 WD	358	sizeof(flash_addr_new->flags));
ea882baf	359	flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);
c609719b WD	360	}
c609719b WD	361
c3f9d493 WD	362	if (flash_addr->flags != ACTIVE_FLAG &&
	363	(flash_addr->flags & ACTIVE_FLAG) == ACTIVE_FLAG) {
	364	char flag = ACTIVE_FLAG;
	365
c609719b	366	gd->env_valid = 2;
ea882baf	367	flash_sect_protect(0, (ulong)flash_addr, end_addr);
c3f9d493	368	flash_write(&flag,
8bde7f77 WD	369	(ulong)&(flash_addr->flags),
8bde7f77 WD	370	sizeof(flash_addr->flags));
ea882baf	371	flash_sect_protect(1, (ulong)flash_addr, end_addr);
c609719b WD	372	}
	373
	374	if (gd->env_valid == 2)
	375	puts ("*** Warning - some problems detected "
	376	"reading environment; recovered successfully\n\n");
0e8d1586	377	#endif /* CONFIG_ENV_ADDR_REDUND */
ea882baf WD	378
ea882baf WD	379	env_import((char *)flash_addr, 1);
c609719b	380	}