Initial revision
diff --git a/common/env_flash.c b/common/env_flash.c
new file mode 100644
index 0000000..1593d2c
--- /dev/null
+++ b/common/env_flash.c
@@ -0,0 +1,377 @@
+/*
+ * (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 <cmd_nvedit.h>
+#include <linux/stddef.h>
+
+#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_SECT_SIZE) && (CFG_ENV_SECT_SIZE > CFG_ENV_SIZE) && \
+ defined(CFG_ENV_ADDR_REDUND)
+#error CFG_ENV_ADDR_REDUND should not be used when CFG_ENV_SECT_SIZE > CFG_ENV_SIZE
+#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;
+
+static ulong end_addr = CFG_ENV_ADDR + CFG_ENV_SIZE - 1;
+static ulong end_addr_new = CFG_ENV_ADDR_REDUND + CFG_ENV_SIZE_REDUND - 1;
+
+static uchar active_flag = 1;
+static uchar obsolete_flag = 0;
+#endif
+
+extern uchar default_environment[];
+extern int default_environment_size;
+
+
+uchar env_get_char_spec (int index)
+{
+ DECLARE_GLOBAL_DATA_PTR;
+
+ return ( *((uchar *)(gd->env_addr + index)) );
+}
+
+#ifdef CFG_ENV_ADDR_REDUND
+
+int env_init(void)
+{
+ DECLARE_GLOBAL_DATA_PTR;
+
+ int crc1_ok =
+ (crc32(0, flash_addr->data, ENV_SIZE) == flash_addr->crc);
+ int crc2_ok =
+ (crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc);
+
+ 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);
+
+ 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)
+{
+ int rc = 1;
+
+ 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;
+ }
+
+ 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 (flash_write(env_ptr->data,
+ (ulong)&(flash_addr_new->data),
+ sizeof(env_ptr->data)) ||
+
+ flash_write((char *)&(env_ptr->crc),
+ (ulong)&(flash_addr_new->crc),
+ sizeof(env_ptr->crc)) ||
+
+ flash_write((char *)&obsolete_flag,
+ (ulong)&(flash_addr->flags),
+ sizeof(flash_addr->flags)) ||
+
+ flash_write((char *)&active_flag,
+ (ulong)&(flash_addr_new->flags),
+ sizeof(flash_addr_new->flags)))
+ {
+ flash_perror (rc);
+ goto Done;
+ }
+ 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:
+
+ /* 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)
+{
+ DECLARE_GLOBAL_DATA_PTR;
+
+ if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
+ gd->env_addr = (ulong)&(env_ptr->data);
+ gd->env_valid = 1;
+ } else {
+ 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 = (char *)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(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
+ DECLARE_GLOBAL_DATA_PTR;
+
+ 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)
+ {
+ gd->env_valid = 2;
+ flash_sect_protect (0, (ulong)flash_addr_new, end_addr_new);
+ flash_write((char *)&obsolete_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)
+ {
+ gd->env_valid = 2;
+ flash_sect_protect (0, (ulong)flash_addr, end_addr);
+ flash_write((char *)&active_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) */