[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>
#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(CONFIG_ENV_ADDR_REDUND)
#error Cannot use CONFIG_ENV_ADDR_REDUND without CONFIG_CMD_ENV & 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

#ifdef CONFIG_INFERNO
# ifdef CONFIG_ENV_ADDR_REDUND
#error CONFIG_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 *)CONFIG_ENV_ADDR;
#endif

#else /* ! ENV_IS_EMBEDDED */

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

#endif /* ENV_IS_EMBEDDED */

#ifdef CONFIG_ENV_ADDR_REDUND
static env_t *flash_addr_new = (env_t *)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;
static ulong end_addr_new = CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1;

#define ACTIVE_FLAG   1
#define OBSOLETE_FLAG 0
#endif /* CONFIG_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 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)
{
	char *saved_data = NULL;
	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;
	}

#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%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 + CONFIG_ENV_SIZE), up_data);
		debug ("Data (start 0x%x, len 0x%x) saved at 0x%x\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_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 CONFIG_ENV_SECT_SIZE > CONFIG_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 + 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
	{
		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)
{
	int	len, rc;
	ulong	end_addr;
	ulong	flash_sect_addr;
#if defined(CONFIG_ENV_SECT_SIZE) && (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE)
	ulong	flash_offset;
	uchar	env_buffer[CONFIG_ENV_SECT_SIZE];
#else
	uchar *env_buffer = (uchar *)env_ptr;
#endif	/* CONFIG_ENV_SECT_SIZE */
	int rcode = 0;

#if defined(CONFIG_ENV_SECT_SIZE) && (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE)

	flash_offset    = ((ulong)flash_addr) & (CONFIG_ENV_SECT_SIZE-1);
	flash_sect_addr = ((ulong)flash_addr) & ~(CONFIG_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, CONFIG_ENV_SECT_SIZE);

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

	len	 = CONFIG_ENV_SECT_SIZE;
#else
	flash_sect_addr = (ulong)flash_addr;
	len	 = CONFIG_ENV_SIZE;
#endif	/* CONFIG_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 /* CONFIG_ENV_ADDR_REDUND */

void env_relocate_spec (void)
{
#if !defined(ENV_IS_EMBEDDED) || defined(CONFIG_ENV_ADDR_REDUND)
#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 */
#ifdef CMD_SAVEENV
	memcpy (env_ptr, (void*)flash_addr, CONFIG_ENV_SIZE);
#endif
#endif /* ! ENV_IS_EMBEDDED || CONFIG_ENV_ADDR_REDUND */
}
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>
c609719b WD	30	#include <command.h>
c609719b WD	31	#include <environment.h>
c609719b	32	#include <linux/stddef.h>
47cd00fa	33	#include <malloc.h>
c609719b	34
d87080b7 WD	35	DECLARE_GLOBAL_DATA_PTR;
d87080b7 WD	36
c3517f91	37	#if defined(CONFIG_CMD_ENV) && defined(CONFIG_CMD_FLASH)
c609719b	38	#define CMD_SAVEENV
0e8d1586 JCPV	39	#elif defined(CONFIG_ENV_ADDR_REDUND)
0e8d1586 JCPV	40	#error Cannot use CONFIG_ENV_ADDR_REDUND without CONFIG_CMD_ENV & CONFIG_CMD_FLASH
c609719b WD	41	#endif
c609719b WD	42
0e8d1586 JCPV	43	#if defined(CONFIG_ENV_SIZE_REDUND) && (CONFIG_ENV_SIZE_REDUND < CONFIG_ENV_SIZE)
0e8d1586 JCPV	44	#error CONFIG_ENV_SIZE_REDUND should not be less then CONFIG_ENV_SIZE
c609719b WD	45	#endif
	46
	47	#ifdef CONFIG_INFERNO
0e8d1586 JCPV	48	# ifdef CONFIG_ENV_ADDR_REDUND
0e8d1586 JCPV	49	#error CONFIG_ENV_ADDR_REDUND is not implemented for CONFIG_INFERNO
c609719b WD	50	# endif
	51	#endif
	52
	53	char * env_name_spec = "Flash";
	54
	55	#ifdef ENV_IS_EMBEDDED
	56
	57	extern uchar environment[];
	58	env_t env_ptr = (env_t )(&environment[0]);
	59
	60	#ifdef CMD_SAVEENV
	61	/* static env_t flash_addr = (env_t )(&environment[0]);-broken on ARM-wd-*/
0e8d1586	62	static env_t flash_addr = (env_t )CONFIG_ENV_ADDR;
c609719b WD	63	#endif
	64
	65	#else /* ! ENV_IS_EMBEDDED */
	66
0e8d1586	67	env_t env_ptr = (env_t )CONFIG_ENV_ADDR;
c609719b	68	#ifdef CMD_SAVEENV
0e8d1586	69	static env_t flash_addr = (env_t )CONFIG_ENV_ADDR;
c609719b WD	70	#endif
	71
	72	#endif /* ENV_IS_EMBEDDED */
	73
0e8d1586 JCPV	74	#ifdef CONFIG_ENV_ADDR_REDUND
0e8d1586 JCPV	75	static env_t flash_addr_new = (env_t )CONFIG_ENV_ADDR_REDUND;
c609719b	76
0e8d1586 JCPV	77	/* CONFIG_ENV_ADDR is supposed to be on sector boundary */
	78	static ulong end_addr = CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1;
	79	static ulong end_addr_new = CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1;
c609719b	80
c3f9d493 WD	81	#define ACTIVE_FLAG 1
c3f9d493 WD	82	#define OBSOLETE_FLAG 0
0e8d1586	83	#endif /* CONFIG_ENV_ADDR_REDUND */
c609719b WD	84
	85	extern uchar default_environment[];
	86	extern int default_environment_size;
	87
	88
	89	uchar env_get_char_spec (int index)
	90	{
c609719b WD	91	return ( ((uchar )(gd->env_addr + index)) );
	92	}
	93
0e8d1586	94	#ifdef CONFIG_ENV_ADDR_REDUND
c609719b WD	95
	96	int env_init(void)
	97	{
8ed96046	98	int crc1_ok = 0, crc2_ok = 0;
c609719b WD	99
	100	uchar flag1 = flash_addr->flags;
	101	uchar flag2 = flash_addr_new->flags;
	102
	103	ulong addr_default = (ulong)&default_environment[0];
	104	ulong addr1 = (ulong)&(flash_addr->data);
	105	ulong addr2 = (ulong)&(flash_addr_new->data);
	106
8ed96046 WD	107	crc1_ok = (crc32(0, flash_addr->data, ENV_SIZE) == flash_addr->crc);
	108	crc2_ok = (crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc);
	109
c3f9d493	110	if (crc1_ok && ! crc2_ok) {
c609719b WD	111	gd->env_addr = addr1;
c609719b WD	112	gd->env_valid = 1;
c3f9d493	113	} else if (! crc1_ok && crc2_ok) {
c609719b WD	114	gd->env_addr = addr2;
c609719b WD	115	gd->env_valid = 1;
c3f9d493	116	} else if (! crc1_ok && ! crc2_ok) {
c609719b WD	117	gd->env_addr = addr_default;
c609719b WD	118	gd->env_valid = 0;
c3f9d493	119	} else if (flag1 == ACTIVE_FLAG && flag2 == OBSOLETE_FLAG) {
c609719b WD	120	gd->env_addr = addr1;
c609719b WD	121	gd->env_valid = 1;
c3f9d493	122	} else if (flag1 == OBSOLETE_FLAG && flag2 == ACTIVE_FLAG) {
c609719b WD	123	gd->env_addr = addr2;
c609719b WD	124	gd->env_valid = 1;
c3f9d493	125	} else if (flag1 == flag2) {
c609719b WD	126	gd->env_addr = addr1;
c609719b WD	127	gd->env_valid = 2;
c3f9d493	128	} else if (flag1 == 0xFF) {
c609719b WD	129	gd->env_addr = addr1;
c609719b WD	130	gd->env_valid = 2;
c3f9d493	131	} else if (flag2 == 0xFF) {
c609719b WD	132	gd->env_addr = addr2;
	133	gd->env_valid = 2;
	134	}
	135
	136	return (0);
	137	}
	138
	139	#ifdef CMD_SAVEENV
	140	int saveenv(void)
	141	{
500545cc	142	char *saved_data = NULL;
c609719b	143	int rc = 1;
c3f9d493	144	char flag = OBSOLETE_FLAG, new_flag = ACTIVE_FLAG;
0e8d1586	145	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
47cd00fa	146	ulong up_data = 0;
500545cc	147	#endif
c609719b WD	148
	149	debug ("Protect off %08lX ... %08lX\n",
	150	(ulong)flash_addr, end_addr);
	151
	152	if (flash_sect_protect (0, (ulong)flash_addr, end_addr)) {
	153	goto Done;
	154	}
	155
	156	debug ("Protect off %08lX ... %08lX\n",
	157	(ulong)flash_addr_new, end_addr_new);
	158
	159	if (flash_sect_protect (0, (ulong)flash_addr_new, end_addr_new)) {
	160	goto Done;
	161	}
	162
0e8d1586 JCPV	163	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
0e8d1586 JCPV	164	up_data = (end_addr_new + 1 - ((long)flash_addr_new + CONFIG_ENV_SIZE));
47cd00fa WD	165	debug ("Data to save 0x%x\n", up_data);
	166	if (up_data) {
	167	if ((saved_data = malloc(up_data)) == NULL) {
8bde7f77	168	printf("Unable to save the rest of sector (%ld)\n",
47cd00fa WD	169	up_data);
	170	goto Done;
	171	}
8bde7f77	172	memcpy(saved_data,
0e8d1586	173	(void *)((long)flash_addr_new + CONFIG_ENV_SIZE), up_data);
8bde7f77	174	debug ("Data (start 0x%x, len 0x%x) saved at 0x%x\n",
0e8d1586	175	(long)flash_addr_new + CONFIG_ENV_SIZE,
47cd00fa WD	176	up_data, saved_data);
	177	}
	178	#endif
c609719b WD	179	puts ("Erasing Flash...");
	180	debug (" %08lX ... %08lX ...",
	181	(ulong)flash_addr_new, end_addr_new);
	182
	183	if (flash_sect_erase ((ulong)flash_addr_new, end_addr_new)) {
	184	goto Done;
	185	}
	186
	187	puts ("Writing to Flash... ");
	188	debug (" %08lX ... %08lX ...",
	189	(ulong)&(flash_addr_new->data),
	190	sizeof(env_ptr->data)+(ulong)&(flash_addr_new->data));
77ddac94	191	if ((rc = flash_write((char *)env_ptr->data,
8bde7f77	192	(ulong)&(flash_addr_new->data),
c40b2956	193	sizeof(env_ptr->data))) \|\|
c40b2956	194	(rc = flash_write((char *)&(env_ptr->crc),
8bde7f77	195	(ulong)&(flash_addr_new->crc),
c40b2956	196	sizeof(env_ptr->crc))) \|\|
c3f9d493	197	(rc = flash_write(&flag,
8bde7f77	198	(ulong)&(flash_addr->flags),
c40b2956	199	sizeof(flash_addr->flags))) \|\|
c3f9d493	200	(rc = flash_write(&new_flag,
8bde7f77	201	(ulong)&(flash_addr_new->flags),
c40b2956	202	sizeof(flash_addr_new->flags))))
c609719b WD	203	{
	204	flash_perror (rc);
	205	goto Done;
	206	}
	207	puts ("done\n");
	208
0e8d1586	209	#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
47cd00fa WD	210	if (up_data) { /* restore the rest of sector */
47cd00fa WD	211	debug ("Restoring the rest of data to 0x%x len 0x%x\n",
0e8d1586	212	(long)flash_addr_new + CONFIG_ENV_SIZE, up_data);
8bde7f77	213	if (flash_write(saved_data,
0e8d1586	214	(long)flash_addr_new + CONFIG_ENV_SIZE,
47cd00fa WD	215	up_data)) {
	216	flash_perror(rc);
	217	goto Done;
	218	}
	219	}
	220	#endif
c609719b WD	221	{
	222	env_t * etmp = flash_addr;
	223	ulong ltmp = end_addr;
	224
	225	flash_addr = flash_addr_new;
	226	flash_addr_new = etmp;
	227
	228	end_addr = end_addr_new;
	229	end_addr_new = ltmp;
	230	}
	231
	232	rc = 0;
	233	Done:
	234
47cd00fa WD	235	if (saved_data)
47cd00fa WD	236	free (saved_data);
c609719b WD	237	/* try to re-protect */
	238	(void) flash_sect_protect (1, (ulong)flash_addr, end_addr);
	239	(void) flash_sect_protect (1, (ulong)flash_addr_new, end_addr_new);
	240
	241	return rc;
	242	}
	243	#endif /* CMD_SAVEENV */
	244
0e8d1586	245	#else /* ! CONFIG_ENV_ADDR_REDUND */
c609719b WD	246
	247	int env_init(void)
	248	{
c609719b WD	249	if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
	250	gd->env_addr = (ulong)&(env_ptr->data);
	251	gd->env_valid = 1;
8ed96046	252	return(0);
c609719b	253	}
9bb8b209	254
8ed96046 WD	255	gd->env_addr = (ulong)&default_environment[0];
8ed96046 WD	256	gd->env_valid = 0;
c609719b WD	257	return (0);
	258	}
	259
	260	#ifdef CMD_SAVEENV
	261
	262	int saveenv(void)
	263	{
	264	int len, rc;
	265	ulong end_addr;
	266	ulong flash_sect_addr;
0e8d1586	267	#if defined(CONFIG_ENV_SECT_SIZE) && (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE)
c609719b	268	ulong flash_offset;
0e8d1586	269	uchar env_buffer[CONFIG_ENV_SECT_SIZE];
c609719b	270	#else
77ddac94	271	uchar env_buffer = (uchar )env_ptr;
0e8d1586	272	#endif /* CONFIG_ENV_SECT_SIZE */
c609719b WD	273	int rcode = 0;
c609719b WD	274
0e8d1586	275	#if defined(CONFIG_ENV_SECT_SIZE) && (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE)
c609719b	276
0e8d1586 JCPV	277	flash_offset = ((ulong)flash_addr) & (CONFIG_ENV_SECT_SIZE-1);
0e8d1586 JCPV	278	flash_sect_addr = ((ulong)flash_addr) & ~(CONFIG_ENV_SECT_SIZE-1);
c609719b WD	279
	280	debug ( "copy old content: "
	281	"sect_addr: %08lX env_addr: %08lX offset: %08lX\n",
	282	flash_sect_addr, (ulong)flash_addr, flash_offset);
	283
	284	/* copy old contents to temporary buffer */
0e8d1586	285	memcpy (env_buffer, (void *)flash_sect_addr, CONFIG_ENV_SECT_SIZE);
c609719b WD	286
	287	/* copy current environment to temporary buffer */
	288	memcpy ((uchar *)((unsigned long)env_buffer + flash_offset),
	289	env_ptr,
0e8d1586	290	CONFIG_ENV_SIZE);
c609719b	291
0e8d1586	292	len = CONFIG_ENV_SECT_SIZE;
c609719b WD	293	#else
c609719b WD	294	flash_sect_addr = (ulong)flash_addr;
0e8d1586 JCPV	295	len = CONFIG_ENV_SIZE;
0e8d1586 JCPV	296	#endif /* CONFIG_ENV_SECT_SIZE */
c609719b WD	297
	298	#ifndef CONFIG_INFERNO
	299	end_addr = flash_sect_addr + len - 1;
	300	#else
	301	/* this is the last sector, and the size is hardcoded here */
	302	/* otherwise we will get stack problems on loading 128 KB environment */
	303	end_addr = flash_sect_addr + 0x20000 - 1;
	304	#endif
	305
	306	debug ("Protect off %08lX ... %08lX\n",
	307	(ulong)flash_sect_addr, end_addr);
	308
	309	if (flash_sect_protect (0, flash_sect_addr, end_addr))
	310	return 1;
	311
	312	puts ("Erasing Flash...");
	313	if (flash_sect_erase (flash_sect_addr, end_addr))
	314	return 1;
	315
	316	puts ("Writing to Flash... ");
77ddac94	317	rc = flash_write((char *)env_buffer, flash_sect_addr, len);
c609719b WD	318	if (rc != 0) {
	319	flash_perror (rc);
	320	rcode = 1;
	321	} else {
	322	puts ("done\n");
	323	}
	324
	325	/* try to re-protect */
	326	(void) flash_sect_protect (1, flash_sect_addr, end_addr);
	327	return rcode;
	328	}
	329
	330	#endif /* CMD_SAVEENV */
	331
0e8d1586	332	#endif /* CONFIG_ENV_ADDR_REDUND */
c609719b WD	333
	334	void env_relocate_spec (void)
	335	{
0e8d1586 JCPV	336	#if !defined(ENV_IS_EMBEDDED) \|\| defined(CONFIG_ENV_ADDR_REDUND)
0e8d1586 JCPV	337	#ifdef CONFIG_ENV_ADDR_REDUND
c3f9d493	338	if (gd->env_addr != (ulong)&(flash_addr->data)) {
c609719b WD	339	env_t * etmp = flash_addr;
	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 WD	354	gd->env_valid = 2;
c609719b WD	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));
c609719b WD	359	flash_sect_protect (1, (ulong)flash_addr_new, end_addr_new);
	360	}
	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 WD	366	gd->env_valid = 2;
c609719b WD	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));
c609719b WD	371	flash_sect_protect (1, (ulong)flash_addr, end_addr);
	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 */
4acc2a10	378	#ifdef CMD_SAVEENV
0e8d1586	379	memcpy (env_ptr, (void*)flash_addr, CONFIG_ENV_SIZE);
4acc2a10	380	#endif
0e8d1586	381	#endif /* ! ENV_IS_EMBEDDED \|\| CONFIG_ENV_ADDR_REDUND */
c609719b	382	}