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

/*
 * (C) Copyright 2000-2002
 * 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>

#if defined(CFG_ENV_IS_IN_FLASH) /* Environment is in Flash */

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

#if ((CONFIG_COMMANDS&(CFG_CMD_ENV|CFG_CMD_FLASH)) == (CFG_CMD_ENV|CFG_CMD_FLASH))
#define CMD_SAVEENV
#elif defined(CFG_ENV_ADDR_REDUND)
#error Cannot use CFG_ENV_ADDR_REDUND without CFG_CMD_ENV & CFG_CMD_FLASH
#endif

#if defined(CFG_ENV_SIZE_REDUND) && (CFG_ENV_SIZE_REDUND < CFG_ENV_SIZE)
#error CFG_ENV_SIZE_REDUND should not be less then CFG_ENV_SIZE
#endif

#ifdef CONFIG_INFERNO
# ifdef CFG_ENV_ADDR_REDUND
#error CFG_ENV_ADDR_REDUND is not implemented for CONFIG_INFERNO
# endif
#endif

char * env_name_spec = "Flash";

#ifdef ENV_IS_EMBEDDED

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

#ifdef CMD_SAVEENV
/* static env_t *flash_addr = (env_t *)(&environment[0]);-broken on ARM-wd-*/
static env_t *flash_addr = (env_t *)CFG_ENV_ADDR;
#endif

#else /* ! ENV_IS_EMBEDDED */

env_t *env_ptr = (env_t *)CFG_ENV_ADDR;
#ifdef CMD_SAVEENV
static env_t *flash_addr = (env_t *)CFG_ENV_ADDR;
#endif

#endif /* ENV_IS_EMBEDDED */

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

/* CFG_ENV_ADDR is supposed to be on sector boundary */
static ulong end_addr = CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1;
static ulong end_addr_new = CFG_ENV_ADDR_REDUND + CFG_ENV_SECT_SIZE - 1;

static uchar active_flag = 1;
static uchar obsolete_flag = 0;
#endif

extern uchar default_environment[];
extern int default_environment_size;


uchar env_get_char_spec (int index)
{
	DECLARE_GLOBAL_DATA_PTR;

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

#ifdef CFG_ENV_ADDR_REDUND

int  env_init(void)
{
	DECLARE_GLOBAL_DATA_PTR;

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

	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);

	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)
{
	char *saved_data = NULL;
	int rc = 1;
#if CFG_ENV_SECT_SIZE > CFG_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;
	}

#if CFG_ENV_SECT_SIZE > CFG_ENV_SIZE
	up_data = (end_addr_new + 1 - ((long)flash_addr_new + CFG_ENV_SIZE));
	debug ("Data to save 0x%x\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 + CFG_ENV_SIZE), up_data);
		debug ("Data (start 0x%x, len 0x%x) saved at 0x%x\n",
			   (long)flash_addr_new + CFG_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 (flash_write(env_ptr->data,
			(ulong)&(flash_addr_new->data),
			sizeof(env_ptr->data)) ||

	    flash_write((char *)&(env_ptr->crc),
			(ulong)&(flash_addr_new->crc),
			sizeof(env_ptr->crc)) ||

	    flash_write((char *)&obsolete_flag,
			(ulong)&(flash_addr->flags),
			sizeof(flash_addr->flags)) ||

	    flash_write((char *)&active_flag,
			(ulong)&(flash_addr_new->flags),
			sizeof(flash_addr_new->flags)))
	{
		flash_perror (rc);
		goto Done;
	}
	puts ("done\n");

#if CFG_ENV_SECT_SIZE > CFG_ENV_SIZE
	if (up_data) { /* restore the rest of sector */
		debug ("Restoring the rest of data to 0x%x len 0x%x\n",
			   (long)flash_addr_new + CFG_ENV_SIZE, up_data);
		if (flash_write(saved_data,
				(long)flash_addr_new + CFG_ENV_SIZE,
				up_data)) {
			flash_perror(rc);
			goto Done;
		}
	}
#endif
	{
		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 /* ! CFG_ENV_ADDR_REDUND */

int  env_init(void)
{
	DECLARE_GLOBAL_DATA_PTR;

	if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
		gd->env_addr  = (ulong)&(env_ptr->data);
		gd->env_valid = 1;
	} else {
		gd->env_addr  = (ulong)&default_environment[0];
		gd->env_valid = 0;
	}

	return (0);
}

#ifdef CMD_SAVEENV

int saveenv(void)
{
	int	len, rc;
	ulong	end_addr;
	ulong	flash_sect_addr;
#if defined(CFG_ENV_SECT_SIZE) && (CFG_ENV_SECT_SIZE > CFG_ENV_SIZE)
	ulong	flash_offset;
	uchar	env_buffer[CFG_ENV_SECT_SIZE];
#else
	uchar *env_buffer = (char *)env_ptr;
#endif	/* CFG_ENV_SECT_SIZE */
	int rcode = 0;

#if defined(CFG_ENV_SECT_SIZE) && (CFG_ENV_SECT_SIZE > CFG_ENV_SIZE)

	flash_offset    = ((ulong)flash_addr) & (CFG_ENV_SECT_SIZE-1);
	flash_sect_addr = ((ulong)flash_addr) & ~(CFG_ENV_SECT_SIZE-1);

	debug ( "copy old content: "
		"sect_addr: %08lX  env_addr: %08lX  offset: %08lX\n",
		flash_sect_addr, (ulong)flash_addr, flash_offset);

	/* copy old contents to temporary buffer */
	memcpy (env_buffer, (void *)flash_sect_addr, CFG_ENV_SECT_SIZE);

	/* copy current environment to temporary buffer */
	memcpy ((uchar *)((unsigned long)env_buffer + flash_offset),
		env_ptr,
		CFG_ENV_SIZE);

	len	 = CFG_ENV_SECT_SIZE;
#else
	flash_sect_addr = (ulong)flash_addr;
	len	 = CFG_ENV_SIZE;
#endif	/* CFG_ENV_SECT_SIZE */

#ifndef CONFIG_INFERNO
	end_addr = flash_sect_addr + len - 1;
#else
	/* this is the last sector, and the size is hardcoded here */
	/* otherwise we will get stack problems on loading 128 KB environment */
	end_addr = flash_sect_addr + 0x20000 - 1;
#endif

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

	if (flash_sect_protect (0, flash_sect_addr, end_addr))
		return 1;

	puts ("Erasing Flash...");
	if (flash_sect_erase (flash_sect_addr, end_addr))
		return 1;

	puts ("Writing to Flash... ");
	rc = flash_write(env_buffer, flash_sect_addr, len);
	if (rc != 0) {
		flash_perror (rc);
		rcode = 1;
	} else {
		puts ("done\n");
	}

	/* try to re-protect */
	(void) flash_sect_protect (1, flash_sect_addr, end_addr);
	return rcode;
}

#endif /* CMD_SAVEENV */

#endif /* CFG_ENV_ADDR_REDUND */

void env_relocate_spec (void)
{
#if !defined(ENV_IS_EMBEDDED) || defined(CFG_ENV_ADDR_REDUND)
#ifdef CFG_ENV_ADDR_REDUND
	DECLARE_GLOBAL_DATA_PTR;

	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)
	{
		gd->env_valid = 2;
		flash_sect_protect (0, (ulong)flash_addr_new, end_addr_new);
		flash_write((char *)&obsolete_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)
	{
		gd->env_valid = 2;
		flash_sect_protect (0, (ulong)flash_addr, end_addr);
		flash_write((char *)&active_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 /* CFG_ENV_ADDR_REDUND */
	memcpy (env_ptr, (void*)flash_addr, CFG_ENV_SIZE);
#endif /* ! ENV_IS_EMBEDDED || CFG_ENV_ADDR_REDUND */
}

#endif /* CFG_ENV_IS_IN_FLASH */
Commit	Line	Data
c609719b WD	1	/*
	2	* (C) Copyright 2000-2002
	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>
	30
	31	#if defined(CFG_ENV_IS_IN_FLASH) /* Environment is in Flash */
	32
	33	#include <command.h>
	34	#include <environment.h>
c609719b	35	#include <linux/stddef.h>
47cd00fa	36	#include <malloc.h>
c609719b WD	37
	38	#if ((CONFIG_COMMANDS&(CFG_CMD_ENV\|CFG_CMD_FLASH)) == (CFG_CMD_ENV\|CFG_CMD_FLASH))
	39	#define CMD_SAVEENV
	40	#elif defined(CFG_ENV_ADDR_REDUND)
	41	#error Cannot use CFG_ENV_ADDR_REDUND without CFG_CMD_ENV & CFG_CMD_FLASH
	42	#endif
	43
c609719b WD	44	#if defined(CFG_ENV_SIZE_REDUND) && (CFG_ENV_SIZE_REDUND < CFG_ENV_SIZE)
	45	#error CFG_ENV_SIZE_REDUND should not be less then CFG_ENV_SIZE
	46	#endif
	47
	48	#ifdef CONFIG_INFERNO
	49	# ifdef CFG_ENV_ADDR_REDUND
	50	#error CFG_ENV_ADDR_REDUND is not implemented for CONFIG_INFERNO
	51	# endif
	52	#endif
	53
	54	char * env_name_spec = "Flash";
	55
	56	#ifdef ENV_IS_EMBEDDED
	57
	58	extern uchar environment[];
	59	env_t env_ptr = (env_t )(&environment[0]);
	60
	61	#ifdef CMD_SAVEENV
	62	/* static env_t flash_addr = (env_t )(&environment[0]);-broken on ARM-wd-*/
	63	static env_t flash_addr = (env_t )CFG_ENV_ADDR;
	64	#endif
	65
	66	#else /* ! ENV_IS_EMBEDDED */
	67
	68	env_t env_ptr = (env_t )CFG_ENV_ADDR;
	69	#ifdef CMD_SAVEENV
	70	static env_t flash_addr = (env_t )CFG_ENV_ADDR;
	71	#endif
	72
	73	#endif /* ENV_IS_EMBEDDED */
	74
	75	#ifdef CFG_ENV_ADDR_REDUND
	76	static env_t flash_addr_new = (env_t )CFG_ENV_ADDR_REDUND;
	77
47cd00fa WD	78	/* CFG_ENV_ADDR is supposed to be on sector boundary */
	79	static ulong end_addr = CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1;
	80	static ulong end_addr_new = CFG_ENV_ADDR_REDUND + CFG_ENV_SECT_SIZE - 1;
c609719b WD	81
	82	static uchar active_flag = 1;
	83	static uchar obsolete_flag = 0;
	84	#endif
	85
	86	extern uchar default_environment[];
	87	extern int default_environment_size;
	88
	89
	90	uchar env_get_char_spec (int index)
	91	{
	92	DECLARE_GLOBAL_DATA_PTR;
	93
	94	return ( ((uchar )(gd->env_addr + index)) );
	95	}
	96
	97	#ifdef CFG_ENV_ADDR_REDUND
	98
	99	int env_init(void)
	100	{
	101	DECLARE_GLOBAL_DATA_PTR;
	102
	103	int crc1_ok =
	104	(crc32(0, flash_addr->data, ENV_SIZE) == flash_addr->crc);
	105	int crc2_ok =
	106	(crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc);
	107
	108	uchar flag1 = flash_addr->flags;
	109	uchar flag2 = flash_addr_new->flags;
	110
	111	ulong addr_default = (ulong)&default_environment[0];
	112	ulong addr1 = (ulong)&(flash_addr->data);
	113	ulong addr2 = (ulong)&(flash_addr_new->data);
	114
	115	if (crc1_ok && ! crc2_ok)
	116	{
	117	gd->env_addr = addr1;
	118	gd->env_valid = 1;
	119	}
	120	else if (! crc1_ok && crc2_ok)
	121	{
	122	gd->env_addr = addr2;
	123	gd->env_valid = 1;
	124	}
	125	else if (! crc1_ok && ! crc2_ok)
	126	{
	127	gd->env_addr = addr_default;
	128	gd->env_valid = 0;
	129	}
	130	else if (flag1 == active_flag && flag2 == obsolete_flag)
	131	{
	132	gd->env_addr = addr1;
	133	gd->env_valid = 1;
	134	}
	135	else if (flag1 == obsolete_flag && flag2 == active_flag)
	136	{
	137	gd->env_addr = addr2;
	138	gd->env_valid = 1;
	139	}
	140	else if (flag1 == flag2)
	141	{
	142	gd->env_addr = addr1;
	143	gd->env_valid = 2;
	144	}
145	else if (flag1 == 0xFF)
146	{
147	gd->env_addr = addr1;
148	gd->env_valid = 2;
149	}
150	else if (flag2 == 0xFF)
151	{
152	gd->env_addr = addr2;
153	gd->env_valid = 2;
154	}
155
156	return (0);
157	}
158
159	#ifdef CMD_SAVEENV
160	int saveenv(void)
161	{
500545cc	162	char *saved_data = NULL;
c609719b	163	int rc = 1;
500545cc	164	#if CFG_ENV_SECT_SIZE > CFG_ENV_SIZE
47cd00fa	165	ulong up_data = 0;
500545cc	166	#endif
c609719b WD	167
	168	debug ("Protect off %08lX ... %08lX\n",
	169	(ulong)flash_addr, end_addr);
	170
	171	if (flash_sect_protect (0, (ulong)flash_addr, end_addr)) {
	172	goto Done;
	173	}
	174
	175	debug ("Protect off %08lX ... %08lX\n",
	176	(ulong)flash_addr_new, end_addr_new);
	177
	178	if (flash_sect_protect (0, (ulong)flash_addr_new, end_addr_new)) {
	179	goto Done;
	180	}
	181
47cd00fa WD	182	#if CFG_ENV_SECT_SIZE > CFG_ENV_SIZE
	183	up_data = (end_addr_new + 1 - ((long)flash_addr_new + CFG_ENV_SIZE));
	184	debug ("Data to save 0x%x\n", up_data);
	185	if (up_data) {
	186	if ((saved_data = malloc(up_data)) == NULL) {
8bde7f77	187	printf("Unable to save the rest of sector (%ld)\n",
47cd00fa WD	188	up_data);
	189	goto Done;
	190	}
8bde7f77	191	memcpy(saved_data,
47cd00fa	192	(void *)((long)flash_addr_new + CFG_ENV_SIZE), up_data);
8bde7f77 WD	193	debug ("Data (start 0x%x, len 0x%x) saved at 0x%x\n",
8bde7f77 WD	194	(long)flash_addr_new + CFG_ENV_SIZE,
47cd00fa WD	195	up_data, saved_data);
	196	}
	197	#endif
c609719b WD	198	puts ("Erasing Flash...");
	199	debug (" %08lX ... %08lX ...",
	200	(ulong)flash_addr_new, end_addr_new);
	201
	202	if (flash_sect_erase ((ulong)flash_addr_new, end_addr_new)) {
	203	goto Done;
	204	}
	205
	206	puts ("Writing to Flash... ");
	207	debug (" %08lX ... %08lX ...",
	208	(ulong)&(flash_addr_new->data),
	209	sizeof(env_ptr->data)+(ulong)&(flash_addr_new->data));
	210	if (flash_write(env_ptr->data,
8bde7f77	211	(ulong)&(flash_addr_new->data),
c609719b WD	212	sizeof(env_ptr->data)) \|\|
	213
	214	flash_write((char *)&(env_ptr->crc),
8bde7f77	215	(ulong)&(flash_addr_new->crc),
c609719b WD	216	sizeof(env_ptr->crc)) \|\|
	217
	218	flash_write((char *)&obsolete_flag,
8bde7f77	219	(ulong)&(flash_addr->flags),
c609719b WD	220	sizeof(flash_addr->flags)) \|\|
	221
	222	flash_write((char *)&active_flag,
8bde7f77	223	(ulong)&(flash_addr_new->flags),
c609719b WD	224	sizeof(flash_addr_new->flags)))
	225	{
	226	flash_perror (rc);
	227	goto Done;
	228	}
	229	puts ("done\n");
	230
47cd00fa WD	231	#if CFG_ENV_SECT_SIZE > CFG_ENV_SIZE
	232	if (up_data) { /* restore the rest of sector */
	233	debug ("Restoring the rest of data to 0x%x len 0x%x\n",
	234	(long)flash_addr_new + CFG_ENV_SIZE, up_data);
8bde7f77 WD	235	if (flash_write(saved_data,
8bde7f77 WD	236	(long)flash_addr_new + CFG_ENV_SIZE,
47cd00fa WD	237	up_data)) {
	238	flash_perror(rc);
	239	goto Done;
	240	}
	241	}
	242	#endif
c609719b WD	243	{
	244	env_t * etmp = flash_addr;
	245	ulong ltmp = end_addr;
	246
	247	flash_addr = flash_addr_new;
	248	flash_addr_new = etmp;
	249
	250	end_addr = end_addr_new;
	251	end_addr_new = ltmp;
	252	}
	253
	254	rc = 0;
	255	Done:
	256
47cd00fa WD	257	if (saved_data)
47cd00fa WD	258	free (saved_data);
c609719b WD	259	/* try to re-protect */
	260	(void) flash_sect_protect (1, (ulong)flash_addr, end_addr);
	261	(void) flash_sect_protect (1, (ulong)flash_addr_new, end_addr_new);
	262
	263	return rc;
	264	}
	265	#endif /* CMD_SAVEENV */
	266
	267	#else /* ! CFG_ENV_ADDR_REDUND */
	268
	269	int env_init(void)
	270	{
	271	DECLARE_GLOBAL_DATA_PTR;
	272
	273	if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
	274	gd->env_addr = (ulong)&(env_ptr->data);
	275	gd->env_valid = 1;
	276	} else {
	277	gd->env_addr = (ulong)&default_environment[0];
	278	gd->env_valid = 0;
	279	}
	280
	281	return (0);
	282	}
	283
	284	#ifdef CMD_SAVEENV
	285
	286	int saveenv(void)
	287	{
	288	int len, rc;
	289	ulong end_addr;
	290	ulong flash_sect_addr;
	291	#if defined(CFG_ENV_SECT_SIZE) && (CFG_ENV_SECT_SIZE > CFG_ENV_SIZE)
	292	ulong flash_offset;
	293	uchar env_buffer[CFG_ENV_SECT_SIZE];
	294	#else
	295	uchar env_buffer = (char )env_ptr;
	296	#endif /* CFG_ENV_SECT_SIZE */
	297	int rcode = 0;
	298
	299	#if defined(CFG_ENV_SECT_SIZE) && (CFG_ENV_SECT_SIZE > CFG_ENV_SIZE)
	300
	301	flash_offset = ((ulong)flash_addr) & (CFG_ENV_SECT_SIZE-1);
	302	flash_sect_addr = ((ulong)flash_addr) & ~(CFG_ENV_SECT_SIZE-1);
	303
	304	debug ( "copy old content: "
	305	"sect_addr: %08lX env_addr: %08lX offset: %08lX\n",
	306	flash_sect_addr, (ulong)flash_addr, flash_offset);
	307
	308	/* copy old contents to temporary buffer */
	309	memcpy (env_buffer, (void *)flash_sect_addr, CFG_ENV_SECT_SIZE);
	310
	311	/* copy current environment to temporary buffer */
	312	memcpy ((uchar *)((unsigned long)env_buffer + flash_offset),
	313	env_ptr,
	314	CFG_ENV_SIZE);
	315
	316	len = CFG_ENV_SECT_SIZE;
	317	#else
	318	flash_sect_addr = (ulong)flash_addr;
	319	len = CFG_ENV_SIZE;
	320	#endif /* CFG_ENV_SECT_SIZE */
	321
	322	#ifndef CONFIG_INFERNO
323	end_addr = flash_sect_addr + len - 1;
324	#else
325	/* this is the last sector, and the size is hardcoded here */
326	/* otherwise we will get stack problems on loading 128 KB environment */
327	end_addr = flash_sect_addr + 0x20000 - 1;
328	#endif
329
330	debug ("Protect off %08lX ... %08lX\n",
331	(ulong)flash_sect_addr, end_addr);
332
333	if (flash_sect_protect (0, flash_sect_addr, end_addr))
334	return 1;
335
336	puts ("Erasing Flash...");
337	if (flash_sect_erase (flash_sect_addr, end_addr))
338	return 1;
339
340	puts ("Writing to Flash... ");
341	rc = flash_write(env_buffer, flash_sect_addr, len);
342	if (rc != 0) {
343	flash_perror (rc);
344	rcode = 1;
345	} else {
346	puts ("done\n");
347	}
348
349	/* try to re-protect */
350	(void) flash_sect_protect (1, flash_sect_addr, end_addr);
351	return rcode;
352	}
353
354	#endif /* CMD_SAVEENV */
355
356	#endif /* CFG_ENV_ADDR_REDUND */
357
358	void env_relocate_spec (void)
359	{
360	#if !defined(ENV_IS_EMBEDDED) \|\| defined(CFG_ENV_ADDR_REDUND)
361	#ifdef CFG_ENV_ADDR_REDUND
362	DECLARE_GLOBAL_DATA_PTR;
363
364	if (gd->env_addr != (ulong)&(flash_addr->data))
365	{
366	env_t * etmp = flash_addr;
367	ulong ltmp = end_addr;
368
369	flash_addr = flash_addr_new;
370	flash_addr_new = etmp;
371
372	end_addr = end_addr_new;
373	end_addr_new = ltmp;
374	}
375
376	if (flash_addr_new->flags != obsolete_flag &&
377	crc32(0, flash_addr_new->data, ENV_SIZE) ==
378	flash_addr_new->crc)
379	{
380	gd->env_valid = 2;
381	flash_sect_protect (0, (ulong)flash_addr_new, end_addr_new);
382	flash_write((char *)&obsolete_flag,
8bde7f77 WD	383	(ulong)&(flash_addr_new->flags),
8bde7f77 WD	384	sizeof(flash_addr_new->flags));
c609719b WD	385	flash_sect_protect (1, (ulong)flash_addr_new, end_addr_new);
	386	}
	387
	388	if (flash_addr->flags != active_flag &&
	389	(flash_addr->flags & active_flag) == active_flag)
	390	{
	391	gd->env_valid = 2;
	392	flash_sect_protect (0, (ulong)flash_addr, end_addr);
	393	flash_write((char *)&active_flag,
8bde7f77 WD	394	(ulong)&(flash_addr->flags),
8bde7f77 WD	395	sizeof(flash_addr->flags));
c609719b WD	396	flash_sect_protect (1, (ulong)flash_addr, end_addr);
	397	}
	398
	399	if (gd->env_valid == 2)
	400	puts ("*** Warning - some problems detected "
	401	"reading environment; recovered successfully\n\n");
	402	#endif /* CFG_ENV_ADDR_REDUND */
	403	memcpy (env_ptr, (void*)flash_addr, CFG_ENV_SIZE);
	404	#endif /* ! ENV_IS_EMBEDDED \|\| CFG_ENV_ADDR_REDUND */
	405	}
	406
43d9616c	407	#endif /* CFG_ENV_IS_IN_FLASH */