[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>

 * SPDX-License-Identifier:	GPL-2.0+
 */

/* #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', 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', 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, wd@denx.de.
	4	*
	5	* (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
	6	* Andreas Heppel <aheppel@sysgo.de>
	7
3765b3e7	8	* SPDX-License-Identifier: GPL-2.0+
c609719b WD	9	*/
	10
	11	/* #define DEBUG */
	12
	13	#include <common.h>
c609719b WD	14	#include <command.h>
c609719b WD	15	#include <environment.h>
c609719b	16	#include <linux/stddef.h>
47cd00fa	17	#include <malloc.h>
ea882baf WD	18	#include <search.h>
ea882baf WD	19	#include <errno.h>
c609719b	20
d87080b7 WD	21	DECLARE_GLOBAL_DATA_PTR;
d87080b7 WD	22
bdab39d3	23	#if defined(CONFIG_CMD_SAVEENV) && defined(CONFIG_CMD_FLASH)
c609719b	24	#define CMD_SAVEENV
0e8d1586	25	#elif defined(CONFIG_ENV_ADDR_REDUND)
82b54b97	26	#error CONFIG_ENV_ADDR_REDUND must have CONFIG_CMD_SAVEENV & CONFIG_CMD_FLASH
c609719b WD	27	#endif
c609719b WD	28
82b54b97 IG	29	#if defined(CONFIG_ENV_SIZE_REDUND) && \
82b54b97 IG	30	(CONFIG_ENV_SIZE_REDUND < CONFIG_ENV_SIZE)
0e8d1586	31	#error CONFIG_ENV_SIZE_REDUND should not be less then CONFIG_ENV_SIZE
c609719b WD	32	#endif
c609719b WD	33
82b54b97	34	char *env_name_spec = "Flash";
c609719b WD	35
c609719b WD	36	#ifdef ENV_IS_EMBEDDED
994bc671	37	env_t *env_ptr = &environment;
c609719b	38
0e8d1586	39	static env_t flash_addr = (env_t )CONFIG_ENV_ADDR;
c609719b WD	40
	41	#else /* ! ENV_IS_EMBEDDED */
	42
0e8d1586	43	env_t env_ptr = (env_t )CONFIG_ENV_ADDR;
0e8d1586	44	static env_t flash_addr = (env_t )CONFIG_ENV_ADDR;
c609719b WD	45	#endif /* ENV_IS_EMBEDDED */
c609719b WD	46
ea882baf WD	47	#if defined(CMD_SAVEENV) \|\| defined(CONFIG_ENV_ADDR_REDUND)
	48	/* CONFIG_ENV_ADDR is supposed to be on sector boundary */
	49	static ulong end_addr = CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1;
	50	#endif
	51
0e8d1586 JCPV	52	#ifdef CONFIG_ENV_ADDR_REDUND
0e8d1586 JCPV	53	static env_t flash_addr_new = (env_t )CONFIG_ENV_ADDR_REDUND;
c609719b	54
ea882baf	55	/* CONFIG_ENV_ADDR_REDUND is supposed to be on sector boundary */
0e8d1586	56	static ulong end_addr_new = CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1;
0e8d1586	57	#endif /* CONFIG_ENV_ADDR_REDUND */
c609719b	58
c609719b	59
0e8d1586	60	#ifdef CONFIG_ENV_ADDR_REDUND
82b54b97	61	int env_init(void)
c609719b	62	{
8ed96046	63	int crc1_ok = 0, crc2_ok = 0;
c609719b WD	64
	65	uchar flag1 = flash_addr->flags;
	66	uchar flag2 = flash_addr_new->flags;
	67
	68	ulong addr_default = (ulong)&default_environment[0];
	69	ulong addr1 = (ulong)&(flash_addr->data);
	70	ulong addr2 = (ulong)&(flash_addr_new->data);
	71
82b54b97 IG	72	crc1_ok = crc32(0, flash_addr->data, ENV_SIZE) == flash_addr->crc;
	73	crc2_ok =
	74	crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc;
	75
	76	if (crc1_ok && !crc2_ok) {
	77	gd->env_addr = addr1;
	78	gd->env_valid = 1;
	79	} else if (!crc1_ok && crc2_ok) {
	80	gd->env_addr = addr2;
	81	gd->env_valid = 1;
	82	} else if (!crc1_ok && !crc2_ok) {
	83	gd->env_addr = addr_default;
	84	gd->env_valid = 0;
c3f9d493	85	} else if (flag1 == ACTIVE_FLAG && flag2 == OBSOLETE_FLAG) {
82b54b97 IG	86	gd->env_addr = addr1;
82b54b97 IG	87	gd->env_valid = 1;
c3f9d493	88	} else if (flag1 == OBSOLETE_FLAG && flag2 == ACTIVE_FLAG) {
82b54b97 IG	89	gd->env_addr = addr2;
82b54b97 IG	90	gd->env_valid = 1;
c3f9d493	91	} else if (flag1 == flag2) {
82b54b97 IG	92	gd->env_addr = addr1;
82b54b97 IG	93	gd->env_valid = 2;
c3f9d493	94	} else if (flag1 == 0xFF) {
82b54b97 IG	95	gd->env_addr = addr1;
82b54b97 IG	96	gd->env_valid = 2;
c3f9d493	97	} else if (flag2 == 0xFF) {
82b54b97 IG	98	gd->env_addr = addr2;
82b54b97 IG	99	gd->env_valid = 2;
c609719b WD	100	}
c609719b WD	101
ea882baf	102	return 0;
c609719b WD	103	}
	104
	105	#ifdef CMD_SAVEENV
	106	int saveenv(void)
	107	{
ea882baf WD	108	env_t env_new;
ea882baf WD	109	ssize_t len;
82b54b97	110	char res, saved_data = NULL;
ea882baf	111	char flag = OBSOLETE_FLAG, new_flag = ACTIVE_FLAG;
82b54b97	112	int rc = 1;
0e8d1586	113	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
ea882baf	114	ulong up_data = 0;
500545cc	115	#endif
c609719b	116
82b54b97	117	debug("Protect off %08lX ... %08lX\n", (ulong)flash_addr, end_addr);
c609719b	118
82b54b97	119	if (flash_sect_protect(0, (ulong)flash_addr, end_addr))
ea882baf	120	goto done;
c609719b	121
ea882baf	122	debug("Protect off %08lX ... %08lX\n",
c609719b WD	123	(ulong)flash_addr_new, end_addr_new);
c609719b WD	124
82b54b97	125	if (flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new))
ea882baf	126	goto done;
ea882baf WD	127
ea882baf WD	128	res = (char *)&env_new.data;
be11235a	129	len = hexport_r(&env_htab, '\0', 0, &res, ENV_SIZE, 0, NULL);
ea882baf WD	130	if (len < 0) {
	131	error("Cannot export environment: errno = %d\n", errno);
	132	goto done;
c609719b	133	}
82b54b97 IG	134	env_new.crc = crc32(0, env_new.data, ENV_SIZE);
82b54b97 IG	135	env_new.flags = new_flag;
c609719b	136
0e8d1586	137	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
82b54b97	138	up_data = end_addr_new + 1 - ((long)flash_addr_new + CONFIG_ENV_SIZE);
ea882baf	139	debug("Data to save 0x%lX\n", up_data);
47cd00fa	140	if (up_data) {
82b54b97 IG	141	saved_data = malloc(up_data);
82b54b97 IG	142	if (saved_data == NULL) {
8bde7f77	143	printf("Unable to save the rest of sector (%ld)\n",
47cd00fa	144	up_data);
ea882baf	145	goto done;
47cd00fa	146	}
8bde7f77	147	memcpy(saved_data,
82b54b97 IG	148	(void *)((long)flash_addr_new + CONFIG_ENV_SIZE),
82b54b97 IG	149	up_data);
ea882baf WD	150	debug("Data (start 0x%lX, len 0x%lX) saved at 0x%p\n",
	151	(long)flash_addr_new + CONFIG_ENV_SIZE,
	152	up_data, saved_data);
47cd00fa WD	153	}
47cd00fa WD	154	#endif
ea882baf	155	puts("Erasing Flash...");
82b54b97	156	debug(" %08lX ... %08lX ...", (ulong)flash_addr_new, end_addr_new);
c609719b	157
82b54b97	158	if (flash_sect_erase((ulong)flash_addr_new, end_addr_new))
ea882baf	159	goto done;
c609719b	160
ea882baf WD	161	puts("Writing to Flash... ");
ea882baf WD	162	debug(" %08lX ... %08lX ...",
c609719b	163	(ulong)&(flash_addr_new->data),
82b54b97 IG	164	sizeof(env_ptr->data) + (ulong)&(flash_addr_new->data));
	165	rc = flash_write((char *)&env_new, (ulong)flash_addr_new,
	166	sizeof(env_new));
	167	if (rc)
	168	goto perror;
	169
	170	rc = flash_write(&flag, (ulong)&(flash_addr->flags),
	171	sizeof(flash_addr->flags));
	172	if (rc)
	173	goto perror;
c609719b	174
0e8d1586	175	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
47cd00fa	176	if (up_data) { /* restore the rest of sector */
ea882baf WD	177	debug("Restoring the rest of data to 0x%lX len 0x%lX\n",
ea882baf WD	178	(long)flash_addr_new + CONFIG_ENV_SIZE, up_data);
8bde7f77	179	if (flash_write(saved_data,
0e8d1586	180	(long)flash_addr_new + CONFIG_ENV_SIZE,
82b54b97 IG	181	up_data))
82b54b97 IG	182	goto perror;
47cd00fa WD	183	}
47cd00fa WD	184	#endif
ea882baf WD	185	puts("done\n");
ea882baf WD	186
c609719b	187	{
82b54b97	188	env_t *etmp = flash_addr;
c609719b WD	189	ulong ltmp = end_addr;
	190
	191	flash_addr = flash_addr_new;
	192	flash_addr_new = etmp;
	193
	194	end_addr = end_addr_new;
	195	end_addr_new = ltmp;
	196	}
	197
	198	rc = 0;
82b54b97 IG	199	goto done;
	200	perror:
	201	flash_perror(rc);
ea882baf	202	done:
47cd00fa	203	if (saved_data)
ea882baf	204	free(saved_data);
c609719b	205	/* try to re-protect */
82b54b97 IG	206	flash_sect_protect(1, (ulong)flash_addr, end_addr);
82b54b97 IG	207	flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);
c609719b WD	208
	209	return rc;
	210	}
	211	#endif /* CMD_SAVEENV */
	212
0e8d1586	213	#else /* ! CONFIG_ENV_ADDR_REDUND */
c609719b	214
82b54b97	215	int env_init(void)
c609719b	216	{
c609719b	217	if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
82b54b97 IG	218	gd->env_addr = (ulong)&(env_ptr->data);
	219	gd->env_valid = 1;
	220	return 0;
c609719b	221	}
9bb8b209	222
82b54b97 IG	223	gd->env_addr = (ulong)&default_environment[0];
82b54b97 IG	224	gd->env_valid = 0;
ea882baf	225	return 0;
c609719b WD	226	}
	227
	228	#ifdef CMD_SAVEENV
c609719b WD	229	int saveenv(void)
c609719b WD	230	{
ea882baf WD	231	env_t env_new;
	232	ssize_t len;
	233	int rc = 1;
82b54b97	234	char res, saved_data = NULL;
ea882baf WD	235	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
ea882baf WD	236	ulong up_data = 0;
c609719b	237
82b54b97	238	up_data = end_addr + 1 - ((long)flash_addr + CONFIG_ENV_SIZE);
ea882baf WD	239	debug("Data to save 0x%lx\n", up_data);
ea882baf WD	240	if (up_data) {
82b54b97 IG	241	saved_data = malloc(up_data);
82b54b97 IG	242	if (saved_data == NULL) {
ea882baf WD	243	printf("Unable to save the rest of sector (%ld)\n",
	244	up_data);
	245	goto done;
	246	}
	247	memcpy(saved_data,
	248	(void *)((long)flash_addr + CONFIG_ENV_SIZE), up_data);
	249	debug("Data (start 0x%lx, len 0x%lx) saved at 0x%lx\n",
	250	(ulong)flash_addr + CONFIG_ENV_SIZE,
	251	up_data,
	252	(ulong)saved_data);
	253	}
0e8d1586	254	#endif /* CONFIG_ENV_SECT_SIZE */
c609719b	255
82b54b97	256	debug("Protect off %08lX ... %08lX\n", (ulong)flash_addr, end_addr);
c609719b	257
ea882baf WD	258	if (flash_sect_protect(0, (long)flash_addr, end_addr))
ea882baf WD	259	goto done;
c609719b	260
ea882baf	261	res = (char *)&env_new.data;
be11235a	262	len = hexport_r(&env_htab, '\0', 0, &res, ENV_SIZE, 0, NULL);
ea882baf WD	263	if (len < 0) {
	264	error("Cannot export environment: errno = %d\n", errno);
	265	goto done;
	266	}
	267	env_new.crc = crc32(0, env_new.data, ENV_SIZE);
c609719b	268
ea882baf WD	269	puts("Erasing Flash...");
	270	if (flash_sect_erase((long)flash_addr, end_addr))
	271	goto done;
c609719b	272
ea882baf WD	273	puts("Writing to Flash... ");
ea882baf WD	274	rc = flash_write((char *)&env_new, (long)flash_addr, CONFIG_ENV_SIZE);
82b54b97 IG	275	if (rc != 0)
	276	goto perror;
	277
ea882baf WD	278	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
	279	if (up_data) { /* restore the rest of sector */
	280	debug("Restoring the rest of data to 0x%lx len 0x%lx\n",
	281	(ulong)flash_addr + CONFIG_ENV_SIZE, up_data);
	282	if (flash_write(saved_data,
	283	(long)flash_addr + CONFIG_ENV_SIZE,
82b54b97 IG	284	up_data))
82b54b97 IG	285	goto perror;
ea882baf WD	286	}
	287	#endif
	288	puts("done\n");
	289	rc = 0;
82b54b97 IG	290	goto done;
	291	perror:
	292	flash_perror(rc);
ea882baf WD	293	done:
	294	if (saved_data)
	295	free(saved_data);
c609719b	296	/* try to re-protect */
82b54b97	297	flash_sect_protect(1, (long)flash_addr, end_addr);
ea882baf	298	return rc;
c609719b	299	}
c609719b WD	300	#endif /* CMD_SAVEENV */
c609719b WD	301
0e8d1586	302	#endif /* CONFIG_ENV_ADDR_REDUND */
c609719b	303
ea882baf	304	void env_relocate_spec(void)
c609719b	305	{
0e8d1586	306	#ifdef CONFIG_ENV_ADDR_REDUND
c3f9d493	307	if (gd->env_addr != (ulong)&(flash_addr->data)) {
ea882baf	308	env_t *etmp = flash_addr;
c609719b WD	309	ulong ltmp = end_addr;
	310
	311	flash_addr = flash_addr_new;
	312	flash_addr_new = etmp;
	313
	314	end_addr = end_addr_new;
	315	end_addr_new = ltmp;
	316	}
	317
c3f9d493	318	if (flash_addr_new->flags != OBSOLETE_FLAG &&
82b54b97	319	crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc) {
c3f9d493 WD	320	char flag = OBSOLETE_FLAG;
c3f9d493 WD	321
c609719b	322	gd->env_valid = 2;
ea882baf	323	flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new);
c3f9d493	324	flash_write(&flag,
8bde7f77 WD	325	(ulong)&(flash_addr_new->flags),
8bde7f77 WD	326	sizeof(flash_addr_new->flags));
ea882baf	327	flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);
c609719b WD	328	}
c609719b WD	329
c3f9d493 WD	330	if (flash_addr->flags != ACTIVE_FLAG &&
	331	(flash_addr->flags & ACTIVE_FLAG) == ACTIVE_FLAG) {
	332	char flag = ACTIVE_FLAG;
	333
c609719b	334	gd->env_valid = 2;
ea882baf	335	flash_sect_protect(0, (ulong)flash_addr, end_addr);
c3f9d493	336	flash_write(&flag,
8bde7f77 WD	337	(ulong)&(flash_addr->flags),
8bde7f77 WD	338	sizeof(flash_addr->flags));
ea882baf	339	flash_sect_protect(1, (ulong)flash_addr, end_addr);
c609719b WD	340	}
	341
	342	if (gd->env_valid == 2)
82b54b97 IG	343	puts("*** Warning - some problems detected "
82b54b97 IG	344	"reading environment; recovered successfully\n\n");
0e8d1586	345	#endif /* CONFIG_ENV_ADDR_REDUND */
ea882baf WD	346
ea882baf WD	347	env_import((char *)flash_addr, 1);
c609719b	348	}