378 lines
9.1 KiB
C
378 lines
9.1 KiB
C
/*
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* (C) Copyright 2000-2002
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Andreas Heppel <aheppel@sysgo.de>
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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/* #define DEBUG */
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#include <common.h>
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#if defined(CFG_ENV_IS_IN_FLASH) /* Environment is in Flash */
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#include <command.h>
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#include <environment.h>
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#include <cmd_nvedit.h>
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#include <linux/stddef.h>
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#if ((CONFIG_COMMANDS&(CFG_CMD_ENV|CFG_CMD_FLASH)) == (CFG_CMD_ENV|CFG_CMD_FLASH))
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#define CMD_SAVEENV
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#elif defined(CFG_ENV_ADDR_REDUND)
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#error Cannot use CFG_ENV_ADDR_REDUND without CFG_CMD_ENV & CFG_CMD_FLASH
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#endif
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#if defined(CFG_ENV_SECT_SIZE) && (CFG_ENV_SECT_SIZE > CFG_ENV_SIZE) && \
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defined(CFG_ENV_ADDR_REDUND)
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#error CFG_ENV_ADDR_REDUND should not be used when CFG_ENV_SECT_SIZE > CFG_ENV_SIZE
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#endif
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#if defined(CFG_ENV_SIZE_REDUND) && (CFG_ENV_SIZE_REDUND < CFG_ENV_SIZE)
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#error CFG_ENV_SIZE_REDUND should not be less then CFG_ENV_SIZE
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#endif
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#ifdef CONFIG_INFERNO
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# ifdef CFG_ENV_ADDR_REDUND
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#error CFG_ENV_ADDR_REDUND is not implemented for CONFIG_INFERNO
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# endif
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#endif
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char * env_name_spec = "Flash";
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#ifdef ENV_IS_EMBEDDED
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extern uchar environment[];
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env_t *env_ptr = (env_t *)(&environment[0]);
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#ifdef CMD_SAVEENV
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/* static env_t *flash_addr = (env_t *)(&environment[0]);-broken on ARM-wd-*/
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static env_t *flash_addr = (env_t *)CFG_ENV_ADDR;
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#endif
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#else /* ! ENV_IS_EMBEDDED */
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env_t *env_ptr = (env_t *)CFG_ENV_ADDR;
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#ifdef CMD_SAVEENV
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static env_t *flash_addr = (env_t *)CFG_ENV_ADDR;
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#endif
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#endif /* ENV_IS_EMBEDDED */
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#ifdef CFG_ENV_ADDR_REDUND
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static env_t *flash_addr_new = (env_t *)CFG_ENV_ADDR_REDUND;
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static ulong end_addr = CFG_ENV_ADDR + CFG_ENV_SIZE - 1;
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static ulong end_addr_new = CFG_ENV_ADDR_REDUND + CFG_ENV_SIZE_REDUND - 1;
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static uchar active_flag = 1;
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static uchar obsolete_flag = 0;
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#endif
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extern uchar default_environment[];
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extern int default_environment_size;
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uchar env_get_char_spec (int index)
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{
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DECLARE_GLOBAL_DATA_PTR;
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return ( *((uchar *)(gd->env_addr + index)) );
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}
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#ifdef CFG_ENV_ADDR_REDUND
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int env_init(void)
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{
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DECLARE_GLOBAL_DATA_PTR;
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int crc1_ok =
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(crc32(0, flash_addr->data, ENV_SIZE) == flash_addr->crc);
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int crc2_ok =
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(crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc);
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uchar flag1 = flash_addr->flags;
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uchar flag2 = flash_addr_new->flags;
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ulong addr_default = (ulong)&default_environment[0];
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ulong addr1 = (ulong)&(flash_addr->data);
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ulong addr2 = (ulong)&(flash_addr_new->data);
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if (crc1_ok && ! crc2_ok)
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{
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gd->env_addr = addr1;
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gd->env_valid = 1;
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}
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else if (! crc1_ok && crc2_ok)
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{
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gd->env_addr = addr2;
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gd->env_valid = 1;
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}
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else if (! crc1_ok && ! crc2_ok)
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{
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gd->env_addr = addr_default;
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gd->env_valid = 0;
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}
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else if (flag1 == active_flag && flag2 == obsolete_flag)
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{
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gd->env_addr = addr1;
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gd->env_valid = 1;
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}
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else if (flag1 == obsolete_flag && flag2 == active_flag)
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{
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gd->env_addr = addr2;
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gd->env_valid = 1;
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}
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else if (flag1 == flag2)
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{
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gd->env_addr = addr1;
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gd->env_valid = 2;
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}
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else if (flag1 == 0xFF)
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{
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gd->env_addr = addr1;
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gd->env_valid = 2;
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}
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else if (flag2 == 0xFF)
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{
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gd->env_addr = addr2;
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gd->env_valid = 2;
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}
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return (0);
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}
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#ifdef CMD_SAVEENV
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int saveenv(void)
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{
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int rc = 1;
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debug ("Protect off %08lX ... %08lX\n",
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(ulong)flash_addr, end_addr);
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if (flash_sect_protect (0, (ulong)flash_addr, end_addr)) {
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goto Done;
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}
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debug ("Protect off %08lX ... %08lX\n",
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(ulong)flash_addr_new, end_addr_new);
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if (flash_sect_protect (0, (ulong)flash_addr_new, end_addr_new)) {
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goto Done;
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}
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puts ("Erasing Flash...");
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debug (" %08lX ... %08lX ...",
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(ulong)flash_addr_new, end_addr_new);
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if (flash_sect_erase ((ulong)flash_addr_new, end_addr_new)) {
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goto Done;
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}
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puts ("Writing to Flash... ");
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debug (" %08lX ... %08lX ...",
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(ulong)&(flash_addr_new->data),
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sizeof(env_ptr->data)+(ulong)&(flash_addr_new->data));
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if (flash_write(env_ptr->data,
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(ulong)&(flash_addr_new->data),
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sizeof(env_ptr->data)) ||
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flash_write((char *)&(env_ptr->crc),
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(ulong)&(flash_addr_new->crc),
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sizeof(env_ptr->crc)) ||
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flash_write((char *)&obsolete_flag,
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(ulong)&(flash_addr->flags),
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sizeof(flash_addr->flags)) ||
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flash_write((char *)&active_flag,
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(ulong)&(flash_addr_new->flags),
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sizeof(flash_addr_new->flags)))
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{
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flash_perror (rc);
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goto Done;
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}
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puts ("done\n");
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{
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env_t * etmp = flash_addr;
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ulong ltmp = end_addr;
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flash_addr = flash_addr_new;
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flash_addr_new = etmp;
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end_addr = end_addr_new;
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end_addr_new = ltmp;
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}
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rc = 0;
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Done:
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/* try to re-protect */
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(void) flash_sect_protect (1, (ulong)flash_addr, end_addr);
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(void) flash_sect_protect (1, (ulong)flash_addr_new, end_addr_new);
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return rc;
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}
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#endif /* CMD_SAVEENV */
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#else /* ! CFG_ENV_ADDR_REDUND */
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int env_init(void)
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{
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DECLARE_GLOBAL_DATA_PTR;
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if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
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gd->env_addr = (ulong)&(env_ptr->data);
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gd->env_valid = 1;
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} else {
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gd->env_addr = (ulong)&default_environment[0];
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gd->env_valid = 0;
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}
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return (0);
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}
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#ifdef CMD_SAVEENV
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int saveenv(void)
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{
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int len, rc;
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ulong end_addr;
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ulong flash_sect_addr;
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#if defined(CFG_ENV_SECT_SIZE) && (CFG_ENV_SECT_SIZE > CFG_ENV_SIZE)
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ulong flash_offset;
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uchar env_buffer[CFG_ENV_SECT_SIZE];
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#else
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uchar *env_buffer = (char *)env_ptr;
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#endif /* CFG_ENV_SECT_SIZE */
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int rcode = 0;
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#if defined(CFG_ENV_SECT_SIZE) && (CFG_ENV_SECT_SIZE > CFG_ENV_SIZE)
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flash_offset = ((ulong)flash_addr) & (CFG_ENV_SECT_SIZE-1);
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flash_sect_addr = ((ulong)flash_addr) & ~(CFG_ENV_SECT_SIZE-1);
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debug ( "copy old content: "
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"sect_addr: %08lX env_addr: %08lX offset: %08lX\n",
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flash_sect_addr, (ulong)flash_addr, flash_offset);
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/* copy old contents to temporary buffer */
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memcpy (env_buffer, (void *)flash_sect_addr, CFG_ENV_SECT_SIZE);
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/* copy current environment to temporary buffer */
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memcpy ((uchar *)((unsigned long)env_buffer + flash_offset),
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env_ptr,
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CFG_ENV_SIZE);
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len = CFG_ENV_SECT_SIZE;
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#else
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flash_sect_addr = (ulong)flash_addr;
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len = CFG_ENV_SIZE;
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#endif /* CFG_ENV_SECT_SIZE */
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#ifndef CONFIG_INFERNO
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end_addr = flash_sect_addr + len - 1;
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#else
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/* this is the last sector, and the size is hardcoded here */
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/* otherwise we will get stack problems on loading 128 KB environment */
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end_addr = flash_sect_addr + 0x20000 - 1;
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#endif
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debug ("Protect off %08lX ... %08lX\n",
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(ulong)flash_sect_addr, end_addr);
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if (flash_sect_protect (0, flash_sect_addr, end_addr))
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return 1;
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puts ("Erasing Flash...");
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if (flash_sect_erase (flash_sect_addr, end_addr))
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return 1;
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puts ("Writing to Flash... ");
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rc = flash_write(env_buffer, flash_sect_addr, len);
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if (rc != 0) {
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flash_perror (rc);
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rcode = 1;
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} else {
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puts ("done\n");
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}
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/* try to re-protect */
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(void) flash_sect_protect (1, flash_sect_addr, end_addr);
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return rcode;
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}
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#endif /* CMD_SAVEENV */
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#endif /* CFG_ENV_ADDR_REDUND */
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void env_relocate_spec (void)
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{
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#if !defined(ENV_IS_EMBEDDED) || defined(CFG_ENV_ADDR_REDUND)
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#ifdef CFG_ENV_ADDR_REDUND
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DECLARE_GLOBAL_DATA_PTR;
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if (gd->env_addr != (ulong)&(flash_addr->data))
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{
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env_t * etmp = flash_addr;
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ulong ltmp = end_addr;
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flash_addr = flash_addr_new;
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flash_addr_new = etmp;
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end_addr = end_addr_new;
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end_addr_new = ltmp;
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}
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if (flash_addr_new->flags != obsolete_flag &&
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crc32(0, flash_addr_new->data, ENV_SIZE) ==
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flash_addr_new->crc)
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{
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gd->env_valid = 2;
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flash_sect_protect (0, (ulong)flash_addr_new, end_addr_new);
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flash_write((char *)&obsolete_flag,
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(ulong)&(flash_addr_new->flags),
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sizeof(flash_addr_new->flags));
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flash_sect_protect (1, (ulong)flash_addr_new, end_addr_new);
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}
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if (flash_addr->flags != active_flag &&
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(flash_addr->flags & active_flag) == active_flag)
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{
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gd->env_valid = 2;
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flash_sect_protect (0, (ulong)flash_addr, end_addr);
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flash_write((char *)&active_flag,
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(ulong)&(flash_addr->flags),
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sizeof(flash_addr->flags));
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flash_sect_protect (1, (ulong)flash_addr, end_addr);
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}
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if (gd->env_valid == 2)
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puts ("*** Warning - some problems detected "
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"reading environment; recovered successfully\n\n");
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#endif /* CFG_ENV_ADDR_REDUND */
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memcpy (env_ptr, (void*)flash_addr, CFG_ENV_SIZE);
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#endif /* ! ENV_IS_EMBEDDED || CFG_ENV_ADDR_REDUND */
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}
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#endif /* CFG_ENV_IS_IN_FLASH */
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