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u-boot/common/env_flash.c
Mike Frysinger 2eb1573f01 hashtable: drop all non-reentrant versions 
The non-reentrant versions of the hashtable functions operate on a single
shared hashtable.  So if two different people try using these funcs for
two different purposes, they'll cause problems for the other.

Avoid this by converting all existing hashtable consumers over to the
reentrant versions and then punting the non-reentrant ones.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-12-17 21:07:14 +01:00

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/*
* (C) Copyright 2000-2010
* 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>
#include <search.h>
#include <errno.h>
DECLARE_GLOBAL_DATA_PTR;
#if defined(CONFIG_CMD_SAVEENV) && defined(CONFIG_CMD_FLASH)
#define CMD_SAVEENV
#elif defined(CONFIG_ENV_ADDR_REDUND)
#error Cannot use CONFIG_ENV_ADDR_REDUND without CONFIG_CMD_SAVEENV & 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
char * env_name_spec = "Flash";
#ifdef ENV_IS_EMBEDDED
extern uchar environment[];
env_t *env_ptr = (env_t *)(&environment[0]);
static env_t *flash_addr = (env_t *)CONFIG_ENV_ADDR;
#else /* ! ENV_IS_EMBEDDED */
env_t *env_ptr = (env_t *)CONFIG_ENV_ADDR;
static env_t *flash_addr = (env_t *)CONFIG_ENV_ADDR;
#endif /* ENV_IS_EMBEDDED */
#if defined(CMD_SAVEENV) || defined(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;
#endif
#ifdef CONFIG_ENV_ADDR_REDUND
static env_t *flash_addr_new = (env_t *)CONFIG_ENV_ADDR_REDUND;
/* CONFIG_ENV_ADDR_REDUND is supposed to be on sector boundary */
static ulong end_addr_new = CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1;
#endif /* CONFIG_ENV_ADDR_REDUND */
extern uchar default_environment[];
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)
{
env_t env_new;
ssize_t len;
char *saved_data = NULL;
char *res;
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;
}
res = (char *)&env_new.data;
len = hexport_r(&env_htab, '\0', &res, ENV_SIZE);
if (len < 0) {
error("Cannot export environment: errno = %d\n", errno);
goto done;
}
env_new.crc = crc32(0, env_new.data, ENV_SIZE);
env_new.flags = new_flag;
#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%lX\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%lX, len 0x%lX) saved at 0x%p\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_new,
(ulong)flash_addr_new,
sizeof(env_new))) ||
(rc = flash_write(&flag,
(ulong)&(flash_addr->flags),
sizeof(flash_addr->flags))) ) {
flash_perror(rc);
goto done;
}
#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
if (up_data) { /* restore the rest of sector */
debug("Restoring the rest of data to 0x%lX len 0x%lX\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
puts("done\n");
{
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)
{
env_t env_new;
ssize_t len;
int rc = 1;
char *res;
char *saved_data = NULL;
#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
ulong up_data = 0;
up_data = (end_addr + 1 - ((long)flash_addr + CONFIG_ENV_SIZE));
debug("Data to save 0x%lx\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 + CONFIG_ENV_SIZE), up_data);
debug("Data (start 0x%lx, len 0x%lx) saved at 0x%lx\n",
(ulong)flash_addr + CONFIG_ENV_SIZE,
up_data,
(ulong)saved_data);
}
#endif /* CONFIG_ENV_SECT_SIZE */
debug("Protect off %08lX ... %08lX\n",
(ulong)flash_addr, end_addr);
if (flash_sect_protect(0, (long)flash_addr, end_addr))
goto done;
res = (char *)&env_new.data;
len = hexport_r(&env_htab, '\0', &res, ENV_SIZE);
if (len < 0) {
error("Cannot export environment: errno = %d\n", errno);
goto done;
}
env_new.crc = crc32(0, env_new.data, ENV_SIZE);
puts("Erasing Flash...");
if (flash_sect_erase((long)flash_addr, end_addr))
goto done;
puts("Writing to Flash... ");
rc = flash_write((char *)&env_new, (long)flash_addr, CONFIG_ENV_SIZE);
if (rc != 0) {
flash_perror(rc);
goto done;
}
#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
if (up_data) { /* restore the rest of sector */
debug("Restoring the rest of data to 0x%lx len 0x%lx\n",
(ulong)flash_addr + CONFIG_ENV_SIZE, up_data);
if (flash_write(saved_data,
(long)flash_addr + CONFIG_ENV_SIZE,
up_data)) {
flash_perror(rc);
goto done;
}
}
#endif
puts("done\n");
rc = 0;
done:
if (saved_data)
free(saved_data);
/* try to re-protect */
(void) flash_sect_protect(1, (long)flash_addr, end_addr);
return rc;
}
#endif /* CMD_SAVEENV */
#endif /* CONFIG_ENV_ADDR_REDUND */
void env_relocate_spec(void)
{
#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 */
env_import((char *)flash_addr, 1);
}
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