[J-u-boot.git] / common / env_flash.c

/*
 * (C) Copyright 2000-2010
 * Wolfgang Denk, DENX Software Engineering, [email protected].
 *
 * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
 * Andreas Heppel <[email protected]>

 * 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 CONFIG_ENV_ADDR_REDUND must have 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
env_t *env_ptr = &environment;

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 */


#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	*res, *saved_data = NULL;
	char	flag = OBSOLETE_FLAG, new_flag = ACTIVE_FLAG;
	int	rc = 1;
#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, 0, NULL);
	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) {
		saved_data = malloc(up_data);
		if (saved_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));
	rc = flash_write((char *)&env_new, (ulong)flash_addr_new,
			 sizeof(env_new));
	if (rc)
		goto perror;

	rc = flash_write(&flag, (ulong)&(flash_addr->flags),
			 sizeof(flash_addr->flags));
	if (rc)
		goto perror;

#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))
			goto perror;
	}
#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;
	goto done;
perror:
	flash_perror(rc);
done:
	if (saved_data)
		free(saved_data);
	/* try to re-protect */
	flash_sect_protect(1, (ulong)flash_addr, end_addr);
	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, *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) {
		saved_data = malloc(up_data);
		if (saved_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, 0, NULL);
	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)
		goto perror;

#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))
			goto perror;
	}
#endif
	puts("done\n");
	rc = 0;
	goto done;
perror:
	flash_perror(rc);
done:
	if (saved_data)
		free(saved_data);
	/* try to re-protect */
	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, [email protected].
	4	*
	5	* (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
	6	* Andreas Heppel <[email protected]>
	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)
82b54b97	42	#error CONFIG_ENV_ADDR_REDUND must have CONFIG_CMD_SAVEENV & CONFIG_CMD_FLASH
c609719b WD	43	#endif
c609719b WD	44
82b54b97 IG	45	#if defined(CONFIG_ENV_SIZE_REDUND) && \
82b54b97 IG	46	(CONFIG_ENV_SIZE_REDUND < CONFIG_ENV_SIZE)
0e8d1586	47	#error CONFIG_ENV_SIZE_REDUND should not be less then CONFIG_ENV_SIZE
c609719b WD	48	#endif
c609719b WD	49
82b54b97	50	char *env_name_spec = "Flash";
c609719b WD	51
c609719b WD	52	#ifdef ENV_IS_EMBEDDED
994bc671	53	env_t *env_ptr = &environment;
c609719b	54
0e8d1586	55	static env_t flash_addr = (env_t )CONFIG_ENV_ADDR;
c609719b WD	56
	57	#else /* ! ENV_IS_EMBEDDED */
	58
0e8d1586	59	env_t env_ptr = (env_t )CONFIG_ENV_ADDR;
0e8d1586	60	static env_t flash_addr = (env_t )CONFIG_ENV_ADDR;
c609719b WD	61	#endif /* ENV_IS_EMBEDDED */
c609719b WD	62
ea882baf WD	63	#if defined(CMD_SAVEENV) \|\| defined(CONFIG_ENV_ADDR_REDUND)
	64	/* CONFIG_ENV_ADDR is supposed to be on sector boundary */
	65	static ulong end_addr = CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1;
	66	#endif
	67
0e8d1586 JCPV	68	#ifdef CONFIG_ENV_ADDR_REDUND
0e8d1586 JCPV	69	static env_t flash_addr_new = (env_t )CONFIG_ENV_ADDR_REDUND;
c609719b	70
ea882baf	71	/* CONFIG_ENV_ADDR_REDUND is supposed to be on sector boundary */
0e8d1586	72	static ulong end_addr_new = CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1;
0e8d1586	73	#endif /* CONFIG_ENV_ADDR_REDUND */
c609719b	74
c609719b	75
0e8d1586	76	#ifdef CONFIG_ENV_ADDR_REDUND
82b54b97	77	int env_init(void)
c609719b	78	{
8ed96046	79	int crc1_ok = 0, crc2_ok = 0;
c609719b WD	80
	81	uchar flag1 = flash_addr->flags;
	82	uchar flag2 = flash_addr_new->flags;
	83
	84	ulong addr_default = (ulong)&default_environment[0];
	85	ulong addr1 = (ulong)&(flash_addr->data);
	86	ulong addr2 = (ulong)&(flash_addr_new->data);
	87
82b54b97 IG	88	crc1_ok = crc32(0, flash_addr->data, ENV_SIZE) == flash_addr->crc;
	89	crc2_ok =
	90	crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc;
	91
	92	if (crc1_ok && !crc2_ok) {
	93	gd->env_addr = addr1;
	94	gd->env_valid = 1;
	95	} else if (!crc1_ok && crc2_ok) {
	96	gd->env_addr = addr2;
	97	gd->env_valid = 1;
	98	} else if (!crc1_ok && !crc2_ok) {
	99	gd->env_addr = addr_default;
	100	gd->env_valid = 0;
c3f9d493	101	} else if (flag1 == ACTIVE_FLAG && flag2 == OBSOLETE_FLAG) {
82b54b97 IG	102	gd->env_addr = addr1;
82b54b97 IG	103	gd->env_valid = 1;
c3f9d493	104	} else if (flag1 == OBSOLETE_FLAG && flag2 == ACTIVE_FLAG) {
82b54b97 IG	105	gd->env_addr = addr2;
82b54b97 IG	106	gd->env_valid = 1;
c3f9d493	107	} else if (flag1 == flag2) {
82b54b97 IG	108	gd->env_addr = addr1;
82b54b97 IG	109	gd->env_valid = 2;
c3f9d493	110	} else if (flag1 == 0xFF) {
82b54b97 IG	111	gd->env_addr = addr1;
82b54b97 IG	112	gd->env_valid = 2;
c3f9d493	113	} else if (flag2 == 0xFF) {
82b54b97 IG	114	gd->env_addr = addr2;
82b54b97 IG	115	gd->env_valid = 2;
c609719b WD	116	}
c609719b WD	117
ea882baf	118	return 0;
c609719b WD	119	}
	120
	121	#ifdef CMD_SAVEENV
	122	int saveenv(void)
	123	{
ea882baf WD	124	env_t env_new;
ea882baf WD	125	ssize_t len;
82b54b97	126	char res, saved_data = NULL;
ea882baf	127	char flag = OBSOLETE_FLAG, new_flag = ACTIVE_FLAG;
82b54b97	128	int rc = 1;
0e8d1586	129	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
ea882baf	130	ulong up_data = 0;
500545cc	131	#endif
c609719b	132
82b54b97	133	debug("Protect off %08lX ... %08lX\n", (ulong)flash_addr, end_addr);
c609719b	134
82b54b97	135	if (flash_sect_protect(0, (ulong)flash_addr, end_addr))
ea882baf	136	goto done;
c609719b	137
ea882baf	138	debug("Protect off %08lX ... %08lX\n",
c609719b WD	139	(ulong)flash_addr_new, end_addr_new);
c609719b WD	140
82b54b97	141	if (flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new))
ea882baf	142	goto done;
ea882baf WD	143
ea882baf WD	144	res = (char *)&env_new.data;
37f2fe74	145	len = hexport_r(&env_htab, '\0', &res, ENV_SIZE, 0, NULL);
ea882baf WD	146	if (len < 0) {
	147	error("Cannot export environment: errno = %d\n", errno);
	148	goto done;
c609719b	149	}
82b54b97 IG	150	env_new.crc = crc32(0, env_new.data, ENV_SIZE);
82b54b97 IG	151	env_new.flags = new_flag;
c609719b	152
0e8d1586	153	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
82b54b97	154	up_data = end_addr_new + 1 - ((long)flash_addr_new + CONFIG_ENV_SIZE);
ea882baf	155	debug("Data to save 0x%lX\n", up_data);
47cd00fa	156	if (up_data) {
82b54b97 IG	157	saved_data = malloc(up_data);
82b54b97 IG	158	if (saved_data == NULL) {
8bde7f77	159	printf("Unable to save the rest of sector (%ld)\n",
47cd00fa	160	up_data);
ea882baf	161	goto done;
47cd00fa	162	}
8bde7f77	163	memcpy(saved_data,
82b54b97 IG	164	(void *)((long)flash_addr_new + CONFIG_ENV_SIZE),
82b54b97 IG	165	up_data);
ea882baf WD	166	debug("Data (start 0x%lX, len 0x%lX) saved at 0x%p\n",
	167	(long)flash_addr_new + CONFIG_ENV_SIZE,
	168	up_data, saved_data);
47cd00fa WD	169	}
47cd00fa WD	170	#endif
ea882baf	171	puts("Erasing Flash...");
82b54b97	172	debug(" %08lX ... %08lX ...", (ulong)flash_addr_new, end_addr_new);
c609719b	173
82b54b97	174	if (flash_sect_erase((ulong)flash_addr_new, end_addr_new))
ea882baf	175	goto done;
c609719b	176
ea882baf WD	177	puts("Writing to Flash... ");
ea882baf WD	178	debug(" %08lX ... %08lX ...",
c609719b	179	(ulong)&(flash_addr_new->data),
82b54b97 IG	180	sizeof(env_ptr->data) + (ulong)&(flash_addr_new->data));
	181	rc = flash_write((char *)&env_new, (ulong)flash_addr_new,
	182	sizeof(env_new));
	183	if (rc)
	184	goto perror;
	185
	186	rc = flash_write(&flag, (ulong)&(flash_addr->flags),
	187	sizeof(flash_addr->flags));
	188	if (rc)
	189	goto perror;
c609719b	190
0e8d1586	191	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
47cd00fa	192	if (up_data) { /* restore the rest of sector */
ea882baf WD	193	debug("Restoring the rest of data to 0x%lX len 0x%lX\n",
ea882baf WD	194	(long)flash_addr_new + CONFIG_ENV_SIZE, up_data);
8bde7f77	195	if (flash_write(saved_data,
0e8d1586	196	(long)flash_addr_new + CONFIG_ENV_SIZE,
82b54b97 IG	197	up_data))
82b54b97 IG	198	goto perror;
47cd00fa WD	199	}
47cd00fa WD	200	#endif
ea882baf WD	201	puts("done\n");
ea882baf WD	202
c609719b	203	{
82b54b97	204	env_t *etmp = flash_addr;
c609719b WD	205	ulong ltmp = end_addr;
	206
	207	flash_addr = flash_addr_new;
	208	flash_addr_new = etmp;
	209
	210	end_addr = end_addr_new;
	211	end_addr_new = ltmp;
	212	}
	213
	214	rc = 0;
82b54b97 IG	215	goto done;
	216	perror:
	217	flash_perror(rc);
ea882baf	218	done:
47cd00fa	219	if (saved_data)
ea882baf	220	free(saved_data);
c609719b	221	/* try to re-protect */
82b54b97 IG	222	flash_sect_protect(1, (ulong)flash_addr, end_addr);
82b54b97 IG	223	flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);
c609719b WD	224
	225	return rc;
	226	}
	227	#endif /* CMD_SAVEENV */
	228
0e8d1586	229	#else /* ! CONFIG_ENV_ADDR_REDUND */
c609719b	230
82b54b97	231	int env_init(void)
c609719b	232	{
c609719b	233	if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
82b54b97 IG	234	gd->env_addr = (ulong)&(env_ptr->data);
	235	gd->env_valid = 1;
	236	return 0;
c609719b	237	}
9bb8b209	238
82b54b97 IG	239	gd->env_addr = (ulong)&default_environment[0];
82b54b97 IG	240	gd->env_valid = 0;
ea882baf	241	return 0;
c609719b WD	242	}
	243
	244	#ifdef CMD_SAVEENV
c609719b WD	245	int saveenv(void)
c609719b WD	246	{
ea882baf WD	247	env_t env_new;
	248	ssize_t len;
	249	int rc = 1;
82b54b97	250	char res, saved_data = NULL;
ea882baf WD	251	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
ea882baf WD	252	ulong up_data = 0;
c609719b	253
82b54b97	254	up_data = end_addr + 1 - ((long)flash_addr + CONFIG_ENV_SIZE);
ea882baf WD	255	debug("Data to save 0x%lx\n", up_data);
ea882baf WD	256	if (up_data) {
82b54b97 IG	257	saved_data = malloc(up_data);
82b54b97 IG	258	if (saved_data == NULL) {
ea882baf WD	259	printf("Unable to save the rest of sector (%ld)\n",
	260	up_data);
	261	goto done;
	262	}
	263	memcpy(saved_data,
	264	(void *)((long)flash_addr + CONFIG_ENV_SIZE), up_data);
	265	debug("Data (start 0x%lx, len 0x%lx) saved at 0x%lx\n",
	266	(ulong)flash_addr + CONFIG_ENV_SIZE,
	267	up_data,
	268	(ulong)saved_data);
	269	}
0e8d1586	270	#endif /* CONFIG_ENV_SECT_SIZE */
c609719b	271
82b54b97	272	debug("Protect off %08lX ... %08lX\n", (ulong)flash_addr, end_addr);
c609719b	273
ea882baf WD	274	if (flash_sect_protect(0, (long)flash_addr, end_addr))
ea882baf WD	275	goto done;
c609719b	276
ea882baf	277	res = (char *)&env_new.data;
37f2fe74	278	len = hexport_r(&env_htab, '\0', &res, ENV_SIZE, 0, NULL);
ea882baf WD	279	if (len < 0) {
	280	error("Cannot export environment: errno = %d\n", errno);
	281	goto done;
	282	}
	283	env_new.crc = crc32(0, env_new.data, ENV_SIZE);
c609719b	284
ea882baf WD	285	puts("Erasing Flash...");
	286	if (flash_sect_erase((long)flash_addr, end_addr))
	287	goto done;
c609719b	288
ea882baf WD	289	puts("Writing to Flash... ");
ea882baf WD	290	rc = flash_write((char *)&env_new, (long)flash_addr, CONFIG_ENV_SIZE);
82b54b97 IG	291	if (rc != 0)
	292	goto perror;
	293
ea882baf WD	294	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
	295	if (up_data) { /* restore the rest of sector */
	296	debug("Restoring the rest of data to 0x%lx len 0x%lx\n",
	297	(ulong)flash_addr + CONFIG_ENV_SIZE, up_data);
	298	if (flash_write(saved_data,
	299	(long)flash_addr + CONFIG_ENV_SIZE,
82b54b97 IG	300	up_data))
82b54b97 IG	301	goto perror;
ea882baf WD	302	}
	303	#endif
	304	puts("done\n");
	305	rc = 0;
82b54b97 IG	306	goto done;
	307	perror:
	308	flash_perror(rc);
ea882baf WD	309	done:
	310	if (saved_data)
	311	free(saved_data);
c609719b	312	/* try to re-protect */
82b54b97	313	flash_sect_protect(1, (long)flash_addr, end_addr);
ea882baf	314	return rc;
c609719b	315	}
c609719b WD	316	#endif /* CMD_SAVEENV */
c609719b WD	317
0e8d1586	318	#endif /* CONFIG_ENV_ADDR_REDUND */
c609719b	319
ea882baf	320	void env_relocate_spec(void)
c609719b	321	{
0e8d1586	322	#ifdef CONFIG_ENV_ADDR_REDUND
c3f9d493	323	if (gd->env_addr != (ulong)&(flash_addr->data)) {
ea882baf	324	env_t *etmp = flash_addr;
c609719b WD	325	ulong ltmp = end_addr;
	326
	327	flash_addr = flash_addr_new;
	328	flash_addr_new = etmp;
	329
	330	end_addr = end_addr_new;
	331	end_addr_new = ltmp;
	332	}
	333
c3f9d493	334	if (flash_addr_new->flags != OBSOLETE_FLAG &&
82b54b97	335	crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc) {
c3f9d493 WD	336	char flag = OBSOLETE_FLAG;
c3f9d493 WD	337
c609719b	338	gd->env_valid = 2;
ea882baf	339	flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new);
c3f9d493	340	flash_write(&flag,
8bde7f77 WD	341	(ulong)&(flash_addr_new->flags),
8bde7f77 WD	342	sizeof(flash_addr_new->flags));
ea882baf	343	flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);
c609719b WD	344	}
c609719b WD	345
c3f9d493 WD	346	if (flash_addr->flags != ACTIVE_FLAG &&
	347	(flash_addr->flags & ACTIVE_FLAG) == ACTIVE_FLAG) {
	348	char flag = ACTIVE_FLAG;
	349
c609719b	350	gd->env_valid = 2;
ea882baf	351	flash_sect_protect(0, (ulong)flash_addr, end_addr);
c3f9d493	352	flash_write(&flag,
8bde7f77 WD	353	(ulong)&(flash_addr->flags),
8bde7f77 WD	354	sizeof(flash_addr->flags));
ea882baf	355	flash_sect_protect(1, (ulong)flash_addr, end_addr);
c609719b WD	356	}
	357
	358	if (gd->env_valid == 2)
82b54b97 IG	359	puts("*** Warning - some problems detected "
82b54b97 IG	360	"reading environment; recovered successfully\n\n");
0e8d1586	361	#endif /* CONFIG_ENV_ADDR_REDUND */
ea882baf WD	362
ea882baf WD	363	env_import((char *)flash_addr, 1);
c609719b	364	}