[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 ((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;

#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);

#ifdef CONFIG_OMAP2420H4
	int flash_probe(void);

	if(flash_probe() == 0)
		goto bad_flash;
#endif

	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;
	}

#ifdef CONFIG_OMAP2420H4
bad_flash:
#endif
	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)
{
#ifdef CONFIG_OMAP2420H4
	int flash_probe(void);

	if(flash_probe() == 0)
		goto bad_flash;
#endif
	if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
		gd->env_addr  = (ulong)&(env_ptr->data);
		gd->env_valid = 1;
		return(0);
	}
#ifdef CONFIG_OMAP2420H4
bad_flash:
#endif
	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
c609719b WD	40	#if ((CONFIG_COMMANDS&(CFG_CMD_ENV\|CFG_CMD_FLASH)) == (CFG_CMD_ENV\|CFG_CMD_FLASH))
	41	#define CMD_SAVEENV
	42	#elif defined(CFG_ENV_ADDR_REDUND)
	43	#error Cannot use CFG_ENV_ADDR_REDUND without CFG_CMD_ENV & CFG_CMD_FLASH
	44	#endif
	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	#ifdef CONFIG_OMAP2420H4
	111	int flash_probe(void);
	112
	113	if(flash_probe() == 0)
	114	goto bad_flash;
	115	#endif
	116
	117	crc1_ok = (crc32(0, flash_addr->data, ENV_SIZE) == flash_addr->crc);
	118	crc2_ok = (crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc);
	119
c3f9d493	120	if (crc1_ok && ! crc2_ok) {
c609719b WD	121	gd->env_addr = addr1;
c609719b WD	122	gd->env_valid = 1;
c3f9d493	123	} else if (! crc1_ok && crc2_ok) {
c609719b WD	124	gd->env_addr = addr2;
c609719b WD	125	gd->env_valid = 1;
c3f9d493	126	} else if (! crc1_ok && ! crc2_ok) {
c609719b WD	127	gd->env_addr = addr_default;
c609719b WD	128	gd->env_valid = 0;
c3f9d493	129	} else if (flag1 == ACTIVE_FLAG && flag2 == OBSOLETE_FLAG) {
c609719b WD	130	gd->env_addr = addr1;
c609719b WD	131	gd->env_valid = 1;
c3f9d493	132	} else if (flag1 == OBSOLETE_FLAG && flag2 == ACTIVE_FLAG) {
c609719b WD	133	gd->env_addr = addr2;
c609719b WD	134	gd->env_valid = 1;
c3f9d493	135	} else if (flag1 == flag2) {
c609719b WD	136	gd->env_addr = addr1;
c609719b WD	137	gd->env_valid = 2;
c3f9d493	138	} else if (flag1 == 0xFF) {
c609719b WD	139	gd->env_addr = addr1;
c609719b WD	140	gd->env_valid = 2;
c3f9d493	141	} else if (flag2 == 0xFF) {
c609719b WD	142	gd->env_addr = addr2;
	143	gd->env_valid = 2;
	144	}
	145
8ed96046 WD	146	#ifdef CONFIG_OMAP2420H4
	147	bad_flash:
	148	#endif
c609719b WD	149	return (0);
	150	}
	151
	152	#ifdef CMD_SAVEENV
	153	int saveenv(void)
	154	{
500545cc	155	char *saved_data = NULL;
c609719b	156	int rc = 1;
c3f9d493	157	char flag = OBSOLETE_FLAG, new_flag = ACTIVE_FLAG;
500545cc	158	#if CFG_ENV_SECT_SIZE > CFG_ENV_SIZE
47cd00fa	159	ulong up_data = 0;
500545cc	160	#endif
c609719b WD	161
	162	debug ("Protect off %08lX ... %08lX\n",
	163	(ulong)flash_addr, end_addr);
	164
	165	if (flash_sect_protect (0, (ulong)flash_addr, end_addr)) {
	166	goto Done;
	167	}
	168
	169	debug ("Protect off %08lX ... %08lX\n",
	170	(ulong)flash_addr_new, end_addr_new);
	171
	172	if (flash_sect_protect (0, (ulong)flash_addr_new, end_addr_new)) {
	173	goto Done;
	174	}
	175
47cd00fa WD	176	#if CFG_ENV_SECT_SIZE > CFG_ENV_SIZE
	177	up_data = (end_addr_new + 1 - ((long)flash_addr_new + CFG_ENV_SIZE));
	178	debug ("Data to save 0x%x\n", up_data);
	179	if (up_data) {
	180	if ((saved_data = malloc(up_data)) == NULL) {
8bde7f77	181	printf("Unable to save the rest of sector (%ld)\n",
47cd00fa WD	182	up_data);
	183	goto Done;
	184	}
8bde7f77	185	memcpy(saved_data,
47cd00fa	186	(void *)((long)flash_addr_new + CFG_ENV_SIZE), up_data);
8bde7f77 WD	187	debug ("Data (start 0x%x, len 0x%x) saved at 0x%x\n",
8bde7f77 WD	188	(long)flash_addr_new + CFG_ENV_SIZE,
47cd00fa WD	189	up_data, saved_data);
	190	}
	191	#endif
c609719b WD	192	puts ("Erasing Flash...");
	193	debug (" %08lX ... %08lX ...",
	194	(ulong)flash_addr_new, end_addr_new);
	195
	196	if (flash_sect_erase ((ulong)flash_addr_new, end_addr_new)) {
	197	goto Done;
	198	}
	199
	200	puts ("Writing to Flash... ");
	201	debug (" %08lX ... %08lX ...",
	202	(ulong)&(flash_addr_new->data),
	203	sizeof(env_ptr->data)+(ulong)&(flash_addr_new->data));
77ddac94	204	if ((rc = flash_write((char *)env_ptr->data,
8bde7f77	205	(ulong)&(flash_addr_new->data),
c40b2956	206	sizeof(env_ptr->data))) \|\|
c40b2956	207	(rc = flash_write((char *)&(env_ptr->crc),
8bde7f77	208	(ulong)&(flash_addr_new->crc),
c40b2956	209	sizeof(env_ptr->crc))) \|\|
c3f9d493	210	(rc = flash_write(&flag,
8bde7f77	211	(ulong)&(flash_addr->flags),
c40b2956	212	sizeof(flash_addr->flags))) \|\|
c3f9d493	213	(rc = flash_write(&new_flag,
8bde7f77	214	(ulong)&(flash_addr_new->flags),
c40b2956	215	sizeof(flash_addr_new->flags))))
c609719b WD	216	{
	217	flash_perror (rc);
	218	goto Done;
	219	}
	220	puts ("done\n");
	221
47cd00fa WD	222	#if CFG_ENV_SECT_SIZE > CFG_ENV_SIZE
	223	if (up_data) { /* restore the rest of sector */
	224	debug ("Restoring the rest of data to 0x%x len 0x%x\n",
	225	(long)flash_addr_new + CFG_ENV_SIZE, up_data);
8bde7f77 WD	226	if (flash_write(saved_data,
8bde7f77 WD	227	(long)flash_addr_new + CFG_ENV_SIZE,
47cd00fa WD	228	up_data)) {
	229	flash_perror(rc);
	230	goto Done;
	231	}
	232	}
	233	#endif
c609719b WD	234	{
	235	env_t * etmp = flash_addr;
	236	ulong ltmp = end_addr;
	237
	238	flash_addr = flash_addr_new;
	239	flash_addr_new = etmp;
	240
	241	end_addr = end_addr_new;
	242	end_addr_new = ltmp;
	243	}
	244
	245	rc = 0;
	246	Done:
	247
47cd00fa WD	248	if (saved_data)
47cd00fa WD	249	free (saved_data);
c609719b WD	250	/* try to re-protect */
	251	(void) flash_sect_protect (1, (ulong)flash_addr, end_addr);
	252	(void) flash_sect_protect (1, (ulong)flash_addr_new, end_addr_new);
	253
	254	return rc;
	255	}
	256	#endif /* CMD_SAVEENV */
	257
	258	#else /* ! CFG_ENV_ADDR_REDUND */
	259
	260	int env_init(void)
	261	{
8ed96046 WD	262	#ifdef CONFIG_OMAP2420H4
8ed96046 WD	263	int flash_probe(void);
c609719b	264
8ed96046 WD	265	if(flash_probe() == 0)
	266	goto bad_flash;
	267	#endif
c609719b WD	268	if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
	269	gd->env_addr = (ulong)&(env_ptr->data);
	270	gd->env_valid = 1;
8ed96046	271	return(0);
c609719b	272	}
8ed96046 WD	273	#ifdef CONFIG_OMAP2420H4
	274	bad_flash:
	275	#endif
	276	gd->env_addr = (ulong)&default_environment[0];
	277	gd->env_valid = 0;
c609719b WD	278	return (0);
	279	}
	280
	281	#ifdef CMD_SAVEENV
	282
	283	int saveenv(void)
	284	{
	285	int len, rc;
	286	ulong end_addr;
	287	ulong flash_sect_addr;
	288	#if defined(CFG_ENV_SECT_SIZE) && (CFG_ENV_SECT_SIZE > CFG_ENV_SIZE)
	289	ulong flash_offset;
	290	uchar env_buffer[CFG_ENV_SECT_SIZE];
	291	#else
77ddac94	292	uchar env_buffer = (uchar )env_ptr;
c609719b WD	293	#endif /* CFG_ENV_SECT_SIZE */
	294	int rcode = 0;
	295
	296	#if defined(CFG_ENV_SECT_SIZE) && (CFG_ENV_SECT_SIZE > CFG_ENV_SIZE)
	297
	298	flash_offset = ((ulong)flash_addr) & (CFG_ENV_SECT_SIZE-1);
	299	flash_sect_addr = ((ulong)flash_addr) & ~(CFG_ENV_SECT_SIZE-1);
	300
	301	debug ( "copy old content: "
	302	"sect_addr: %08lX env_addr: %08lX offset: %08lX\n",
	303	flash_sect_addr, (ulong)flash_addr, flash_offset);
	304
	305	/* copy old contents to temporary buffer */
	306	memcpy (env_buffer, (void *)flash_sect_addr, CFG_ENV_SECT_SIZE);
	307
	308	/* copy current environment to temporary buffer */
	309	memcpy ((uchar *)((unsigned long)env_buffer + flash_offset),
	310	env_ptr,
	311	CFG_ENV_SIZE);
	312
	313	len = CFG_ENV_SECT_SIZE;
	314	#else
	315	flash_sect_addr = (ulong)flash_addr;
	316	len = CFG_ENV_SIZE;
	317	#endif /* CFG_ENV_SECT_SIZE */
	318
	319	#ifndef CONFIG_INFERNO
	320	end_addr = flash_sect_addr + len - 1;
	321	#else
	322	/* this is the last sector, and the size is hardcoded here */
	323	/* otherwise we will get stack problems on loading 128 KB environment */
	324	end_addr = flash_sect_addr + 0x20000 - 1;
	325	#endif
	326
	327	debug ("Protect off %08lX ... %08lX\n",
	328	(ulong)flash_sect_addr, end_addr);
	329
	330	if (flash_sect_protect (0, flash_sect_addr, end_addr))
	331	return 1;
	332
	333	puts ("Erasing Flash...");
	334	if (flash_sect_erase (flash_sect_addr, end_addr))
	335	return 1;
	336
	337	puts ("Writing to Flash... ");
77ddac94	338	rc = flash_write((char *)env_buffer, flash_sect_addr, len);
c609719b WD	339	if (rc != 0) {
	340	flash_perror (rc);
	341	rcode = 1;
	342	} else {
	343	puts ("done\n");
	344	}
	345
	346	/* try to re-protect */
	347	(void) flash_sect_protect (1, flash_sect_addr, end_addr);
	348	return rcode;
	349	}
	350
	351	#endif /* CMD_SAVEENV */
	352
	353	#endif /* CFG_ENV_ADDR_REDUND */
	354
	355	void env_relocate_spec (void)
	356	{
	357	#if !defined(ENV_IS_EMBEDDED) \|\| defined(CFG_ENV_ADDR_REDUND)
	358	#ifdef CFG_ENV_ADDR_REDUND
c3f9d493	359	if (gd->env_addr != (ulong)&(flash_addr->data)) {
c609719b WD	360	env_t * etmp = flash_addr;
	361	ulong ltmp = end_addr;
	362
	363	flash_addr = flash_addr_new;
	364	flash_addr_new = etmp;
	365
	366	end_addr = end_addr_new;
	367	end_addr_new = ltmp;
	368	}
	369
c3f9d493	370	if (flash_addr_new->flags != OBSOLETE_FLAG &&
c609719b	371	crc32(0, flash_addr_new->data, ENV_SIZE) ==
c3f9d493 WD	372	flash_addr_new->crc) {
	373	char flag = OBSOLETE_FLAG;
	374
c609719b WD	375	gd->env_valid = 2;
c609719b WD	376	flash_sect_protect (0, (ulong)flash_addr_new, end_addr_new);
c3f9d493	377	flash_write(&flag,
8bde7f77 WD	378	(ulong)&(flash_addr_new->flags),
8bde7f77 WD	379	sizeof(flash_addr_new->flags));
c609719b WD	380	flash_sect_protect (1, (ulong)flash_addr_new, end_addr_new);
	381	}
	382
c3f9d493 WD	383	if (flash_addr->flags != ACTIVE_FLAG &&
	384	(flash_addr->flags & ACTIVE_FLAG) == ACTIVE_FLAG) {
	385	char flag = ACTIVE_FLAG;
	386
c609719b WD	387	gd->env_valid = 2;
c609719b WD	388	flash_sect_protect (0, (ulong)flash_addr, end_addr);
c3f9d493	389	flash_write(&flag,
8bde7f77 WD	390	(ulong)&(flash_addr->flags),
8bde7f77 WD	391	sizeof(flash_addr->flags));
c609719b WD	392	flash_sect_protect (1, (ulong)flash_addr, end_addr);
	393	}
	394
	395	if (gd->env_valid == 2)
	396	puts ("*** Warning - some problems detected "
	397	"reading environment; recovered successfully\n\n");
	398	#endif /* CFG_ENV_ADDR_REDUND */
	399	memcpy (env_ptr, (void*)flash_addr, CFG_ENV_SIZE);
	400	#endif /* ! ENV_IS_EMBEDDED \|\| CFG_ENV_ADDR_REDUND */
	401	}
	402
43d9616c	403	#endif /* CFG_ENV_IS_IN_FLASH */