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

/* #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>

DECLARE_GLOBAL_DATA_PTR;

#if defined(CONFIG_CMD_ENV) && defined(CONFIG_CMD_FLASH)
#define CMD_SAVEENV
#elif defined(CFG_ENV_ADDR_REDUND)
#error Cannot use CFG_ENV_ADDR_REDUND without CONFIG_CMD_ENV & CONFIG_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;

#define ACTIVE_FLAG   1
#define OBSOLETE_FLAG 0
#endif /* CFG_ENV_ADDR_REDUND */

extern uchar default_environment[];
extern int default_environment_size;


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

#ifdef CFG_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)
{
	char *saved_data = NULL;
	int rc = 1;
	char flag = OBSOLETE_FLAG, new_flag = ACTIVE_FLAG;
#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 ((rc = flash_write((char *)env_ptr->data,
			(ulong)&(flash_addr_new->data),
			sizeof(env_ptr->data))) ||
	    (rc = flash_write((char *)&(env_ptr->crc),
			(ulong)&(flash_addr_new->crc),
			sizeof(env_ptr->crc))) ||
	    (rc = flash_write(&flag,
			(ulong)&(flash_addr->flags),
			sizeof(flash_addr->flags))) ||
	    (rc = flash_write(&new_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)
{
	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)
{
	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 = (uchar *)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((char *)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
	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 /* 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, 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>
	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	37
d87080b7 WD	38	DECLARE_GLOBAL_DATA_PTR;
d87080b7 WD	39
c3517f91	40	#if defined(CONFIG_CMD_ENV) && defined(CONFIG_CMD_FLASH)
c609719b WD	41	#define CMD_SAVEENV
c609719b WD	42	#elif defined(CFG_ENV_ADDR_REDUND)
90253178	43	#error Cannot use CFG_ENV_ADDR_REDUND without CONFIG_CMD_ENV & CONFIG_CMD_FLASH
c609719b WD	44	#endif
c609719b WD	45
c609719b WD	46	#if defined(CFG_ENV_SIZE_REDUND) && (CFG_ENV_SIZE_REDUND < CFG_ENV_SIZE)
	47	#error CFG_ENV_SIZE_REDUND should not be less then CFG_ENV_SIZE
	48	#endif
	49
	50	#ifdef CONFIG_INFERNO
	51	# ifdef CFG_ENV_ADDR_REDUND
	52	#error CFG_ENV_ADDR_REDUND is not implemented for CONFIG_INFERNO
	53	# endif
	54	#endif
	55
	56	char * env_name_spec = "Flash";
	57
	58	#ifdef ENV_IS_EMBEDDED
	59
	60	extern uchar environment[];
	61	env_t env_ptr = (env_t )(&environment[0]);
	62
	63	#ifdef CMD_SAVEENV
	64	/* static env_t flash_addr = (env_t )(&environment[0]);-broken on ARM-wd-*/
	65	static env_t flash_addr = (env_t )CFG_ENV_ADDR;
	66	#endif
	67
	68	#else /* ! ENV_IS_EMBEDDED */
	69
	70	env_t env_ptr = (env_t )CFG_ENV_ADDR;
	71	#ifdef CMD_SAVEENV
	72	static env_t flash_addr = (env_t )CFG_ENV_ADDR;
	73	#endif
	74
	75	#endif /* ENV_IS_EMBEDDED */
	76
	77	#ifdef CFG_ENV_ADDR_REDUND
	78	static env_t flash_addr_new = (env_t )CFG_ENV_ADDR_REDUND;
	79
47cd00fa WD	80	/* CFG_ENV_ADDR is supposed to be on sector boundary */
	81	static ulong end_addr = CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1;
	82	static ulong end_addr_new = CFG_ENV_ADDR_REDUND + CFG_ENV_SECT_SIZE - 1;
c609719b	83
c3f9d493 WD	84	#define ACTIVE_FLAG 1
	85	#define OBSOLETE_FLAG 0
	86	#endif /* CFG_ENV_ADDR_REDUND */
c609719b WD	87
	88	extern uchar default_environment[];
	89	extern int default_environment_size;
	90
	91
	92	uchar env_get_char_spec (int index)
	93	{
c609719b WD	94	return ( ((uchar )(gd->env_addr + index)) );
	95	}
	96
	97	#ifdef CFG_ENV_ADDR_REDUND
	98
	99	int env_init(void)
	100	{
8ed96046	101	int crc1_ok = 0, crc2_ok = 0;
c609719b WD	102
	103	uchar flag1 = flash_addr->flags;
	104	uchar flag2 = flash_addr_new->flags;
	105
	106	ulong addr_default = (ulong)&default_environment[0];
	107	ulong addr1 = (ulong)&(flash_addr->data);
	108	ulong addr2 = (ulong)&(flash_addr_new->data);
	109
8ed96046 WD	110	crc1_ok = (crc32(0, flash_addr->data, ENV_SIZE) == flash_addr->crc);
	111	crc2_ok = (crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc);
	112
c3f9d493	113	if (crc1_ok && ! crc2_ok) {
c609719b WD	114	gd->env_addr = addr1;
c609719b WD	115	gd->env_valid = 1;
c3f9d493	116	} else if (! crc1_ok && crc2_ok) {
c609719b WD	117	gd->env_addr = addr2;
c609719b WD	118	gd->env_valid = 1;
c3f9d493	119	} else if (! crc1_ok && ! crc2_ok) {
c609719b WD	120	gd->env_addr = addr_default;
c609719b WD	121	gd->env_valid = 0;
c3f9d493	122	} else if (flag1 == ACTIVE_FLAG && flag2 == OBSOLETE_FLAG) {
c609719b WD	123	gd->env_addr = addr1;
c609719b WD	124	gd->env_valid = 1;
c3f9d493	125	} else if (flag1 == OBSOLETE_FLAG && flag2 == ACTIVE_FLAG) {
c609719b WD	126	gd->env_addr = addr2;
c609719b WD	127	gd->env_valid = 1;
c3f9d493	128	} else if (flag1 == flag2) {
c609719b WD	129	gd->env_addr = addr1;
c609719b WD	130	gd->env_valid = 2;
c3f9d493	131	} else if (flag1 == 0xFF) {
c609719b WD	132	gd->env_addr = addr1;
c609719b WD	133	gd->env_valid = 2;
c3f9d493	134	} else if (flag2 == 0xFF) {
c609719b WD	135	gd->env_addr = addr2;
	136	gd->env_valid = 2;
	137	}
	138
	139	return (0);
	140	}
	141
	142	#ifdef CMD_SAVEENV
	143	int saveenv(void)
	144	{
500545cc	145	char *saved_data = NULL;
c609719b	146	int rc = 1;
c3f9d493	147	char flag = OBSOLETE_FLAG, new_flag = ACTIVE_FLAG;
500545cc	148	#if CFG_ENV_SECT_SIZE > CFG_ENV_SIZE
47cd00fa	149	ulong up_data = 0;
500545cc	150	#endif
c609719b WD	151
	152	debug ("Protect off %08lX ... %08lX\n",
	153	(ulong)flash_addr, end_addr);
	154
	155	if (flash_sect_protect (0, (ulong)flash_addr, end_addr)) {
	156	goto Done;
	157	}
	158
	159	debug ("Protect off %08lX ... %08lX\n",
	160	(ulong)flash_addr_new, end_addr_new);
	161
	162	if (flash_sect_protect (0, (ulong)flash_addr_new, end_addr_new)) {
	163	goto Done;
	164	}
	165
47cd00fa WD	166	#if CFG_ENV_SECT_SIZE > CFG_ENV_SIZE
	167	up_data = (end_addr_new + 1 - ((long)flash_addr_new + CFG_ENV_SIZE));
	168	debug ("Data to save 0x%x\n", up_data);
	169	if (up_data) {
	170	if ((saved_data = malloc(up_data)) == NULL) {
8bde7f77	171	printf("Unable to save the rest of sector (%ld)\n",
47cd00fa WD	172	up_data);
	173	goto Done;
	174	}
8bde7f77	175	memcpy(saved_data,
47cd00fa	176	(void *)((long)flash_addr_new + CFG_ENV_SIZE), up_data);
8bde7f77 WD	177	debug ("Data (start 0x%x, len 0x%x) saved at 0x%x\n",
8bde7f77 WD	178	(long)flash_addr_new + CFG_ENV_SIZE,
47cd00fa WD	179	up_data, saved_data);
	180	}
	181	#endif
c609719b WD	182	puts ("Erasing Flash...");
	183	debug (" %08lX ... %08lX ...",
	184	(ulong)flash_addr_new, end_addr_new);
	185
	186	if (flash_sect_erase ((ulong)flash_addr_new, end_addr_new)) {
	187	goto Done;
	188	}
	189
	190	puts ("Writing to Flash... ");
	191	debug (" %08lX ... %08lX ...",
	192	(ulong)&(flash_addr_new->data),
	193	sizeof(env_ptr->data)+(ulong)&(flash_addr_new->data));
77ddac94	194	if ((rc = flash_write((char *)env_ptr->data,
8bde7f77	195	(ulong)&(flash_addr_new->data),
c40b2956	196	sizeof(env_ptr->data))) \|\|
c40b2956	197	(rc = flash_write((char *)&(env_ptr->crc),
8bde7f77	198	(ulong)&(flash_addr_new->crc),
c40b2956	199	sizeof(env_ptr->crc))) \|\|
c3f9d493	200	(rc = flash_write(&flag,
8bde7f77	201	(ulong)&(flash_addr->flags),
c40b2956	202	sizeof(flash_addr->flags))) \|\|
c3f9d493	203	(rc = flash_write(&new_flag,
8bde7f77	204	(ulong)&(flash_addr_new->flags),
c40b2956	205	sizeof(flash_addr_new->flags))))
c609719b WD	206	{
	207	flash_perror (rc);
	208	goto Done;
	209	}
	210	puts ("done\n");
	211
47cd00fa WD	212	#if CFG_ENV_SECT_SIZE > CFG_ENV_SIZE
	213	if (up_data) { /* restore the rest of sector */
	214	debug ("Restoring the rest of data to 0x%x len 0x%x\n",
	215	(long)flash_addr_new + CFG_ENV_SIZE, up_data);
8bde7f77 WD	216	if (flash_write(saved_data,
8bde7f77 WD	217	(long)flash_addr_new + CFG_ENV_SIZE,
47cd00fa WD	218	up_data)) {
	219	flash_perror(rc);
	220	goto Done;
	221	}
	222	}
	223	#endif
c609719b WD	224	{
	225	env_t * etmp = flash_addr;
	226	ulong ltmp = end_addr;
	227
	228	flash_addr = flash_addr_new;
	229	flash_addr_new = etmp;
	230
	231	end_addr = end_addr_new;
	232	end_addr_new = ltmp;
	233	}
	234
	235	rc = 0;
	236	Done:
	237
47cd00fa WD	238	if (saved_data)
47cd00fa WD	239	free (saved_data);
c609719b WD	240	/* try to re-protect */
	241	(void) flash_sect_protect (1, (ulong)flash_addr, end_addr);
	242	(void) flash_sect_protect (1, (ulong)flash_addr_new, end_addr_new);
	243
	244	return rc;
	245	}
	246	#endif /* CMD_SAVEENV */
	247
	248	#else /* ! CFG_ENV_ADDR_REDUND */
	249
	250	int env_init(void)
	251	{
c609719b WD	252	if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
	253	gd->env_addr = (ulong)&(env_ptr->data);
	254	gd->env_valid = 1;
8ed96046	255	return(0);
c609719b	256	}
9bb8b209	257
8ed96046 WD	258	gd->env_addr = (ulong)&default_environment[0];
8ed96046 WD	259	gd->env_valid = 0;
c609719b WD	260	return (0);
	261	}
	262
	263	#ifdef CMD_SAVEENV
	264
	265	int saveenv(void)
	266	{
	267	int len, rc;
	268	ulong end_addr;
	269	ulong flash_sect_addr;
	270	#if defined(CFG_ENV_SECT_SIZE) && (CFG_ENV_SECT_SIZE > CFG_ENV_SIZE)
	271	ulong flash_offset;
	272	uchar env_buffer[CFG_ENV_SECT_SIZE];
	273	#else
77ddac94	274	uchar env_buffer = (uchar )env_ptr;
c609719b WD	275	#endif /* CFG_ENV_SECT_SIZE */
	276	int rcode = 0;
	277
	278	#if defined(CFG_ENV_SECT_SIZE) && (CFG_ENV_SECT_SIZE > CFG_ENV_SIZE)
	279
	280	flash_offset = ((ulong)flash_addr) & (CFG_ENV_SECT_SIZE-1);
	281	flash_sect_addr = ((ulong)flash_addr) & ~(CFG_ENV_SECT_SIZE-1);
	282
	283	debug ( "copy old content: "
	284	"sect_addr: %08lX env_addr: %08lX offset: %08lX\n",
	285	flash_sect_addr, (ulong)flash_addr, flash_offset);
	286
	287	/* copy old contents to temporary buffer */
	288	memcpy (env_buffer, (void *)flash_sect_addr, CFG_ENV_SECT_SIZE);
	289
	290	/* copy current environment to temporary buffer */
	291	memcpy ((uchar *)((unsigned long)env_buffer + flash_offset),
	292	env_ptr,
	293	CFG_ENV_SIZE);
	294
	295	len = CFG_ENV_SECT_SIZE;
	296	#else
	297	flash_sect_addr = (ulong)flash_addr;
	298	len = CFG_ENV_SIZE;
	299	#endif /* CFG_ENV_SECT_SIZE */
	300
	301	#ifndef CONFIG_INFERNO
	302	end_addr = flash_sect_addr + len - 1;
	303	#else
	304	/* this is the last sector, and the size is hardcoded here */
	305	/* otherwise we will get stack problems on loading 128 KB environment */
	306	end_addr = flash_sect_addr + 0x20000 - 1;
	307	#endif
	308
	309	debug ("Protect off %08lX ... %08lX\n",
	310	(ulong)flash_sect_addr, end_addr);
	311
	312	if (flash_sect_protect (0, flash_sect_addr, end_addr))
	313	return 1;
	314
	315	puts ("Erasing Flash...");
	316	if (flash_sect_erase (flash_sect_addr, end_addr))
	317	return 1;
	318
	319	puts ("Writing to Flash... ");
77ddac94	320	rc = flash_write((char *)env_buffer, flash_sect_addr, len);
c609719b WD	321	if (rc != 0) {
	322	flash_perror (rc);
	323	rcode = 1;
	324	} else {
	325	puts ("done\n");
	326	}
	327
	328	/* try to re-protect */
	329	(void) flash_sect_protect (1, flash_sect_addr, end_addr);
	330	return rcode;
	331	}
	332
	333	#endif /* CMD_SAVEENV */
	334
	335	#endif /* CFG_ENV_ADDR_REDUND */
	336
	337	void env_relocate_spec (void)
	338	{
	339	#if !defined(ENV_IS_EMBEDDED) \|\| defined(CFG_ENV_ADDR_REDUND)
	340	#ifdef CFG_ENV_ADDR_REDUND
c3f9d493	341	if (gd->env_addr != (ulong)&(flash_addr->data)) {
c609719b WD	342	env_t * etmp = flash_addr;
	343	ulong ltmp = end_addr;
	344
	345	flash_addr = flash_addr_new;
	346	flash_addr_new = etmp;
	347
	348	end_addr = end_addr_new;
	349	end_addr_new = ltmp;
	350	}
	351
c3f9d493	352	if (flash_addr_new->flags != OBSOLETE_FLAG &&
c609719b	353	crc32(0, flash_addr_new->data, ENV_SIZE) ==
c3f9d493 WD	354	flash_addr_new->crc) {
	355	char flag = OBSOLETE_FLAG;
	356
c609719b WD	357	gd->env_valid = 2;
c609719b WD	358	flash_sect_protect (0, (ulong)flash_addr_new, end_addr_new);
c3f9d493	359	flash_write(&flag,
8bde7f77 WD	360	(ulong)&(flash_addr_new->flags),
8bde7f77 WD	361	sizeof(flash_addr_new->flags));
c609719b WD	362	flash_sect_protect (1, (ulong)flash_addr_new, end_addr_new);
	363	}
	364
c3f9d493 WD	365	if (flash_addr->flags != ACTIVE_FLAG &&
	366	(flash_addr->flags & ACTIVE_FLAG) == ACTIVE_FLAG) {
	367	char flag = ACTIVE_FLAG;
	368
c609719b WD	369	gd->env_valid = 2;
c609719b WD	370	flash_sect_protect (0, (ulong)flash_addr, end_addr);
c3f9d493	371	flash_write(&flag,
8bde7f77 WD	372	(ulong)&(flash_addr->flags),
8bde7f77 WD	373	sizeof(flash_addr->flags));
c609719b WD	374	flash_sect_protect (1, (ulong)flash_addr, end_addr);
	375	}
	376
	377	if (gd->env_valid == 2)
	378	puts ("*** Warning - some problems detected "
	379	"reading environment; recovered successfully\n\n");
	380	#endif /* CFG_ENV_ADDR_REDUND */
	381	memcpy (env_ptr, (void*)flash_addr, CFG_ENV_SIZE);
	382	#endif /* ! ENV_IS_EMBEDDED \|\| CFG_ENV_ADDR_REDUND */
	383	}
	384
43d9616c	385	#endif /* CFG_ENV_IS_IN_FLASH */