env: Add an enum for environment state

[oweals/u-boot.git] / include / environment.h

diff --git a/include/environment.h b/include/environment.h
index 08679aead95cca90fd4f178d2c5b36e61b061b8e..ad2331c90b4d8f2e1f162b37ad1b6174b7c9a368 100644 (file)
--- a/include/environment.h
+++ b/include/environment.h
@@ -8,6 +8,8 @@
 #ifndef _ENVIRONMENT_H_
 #define _ENVIRONMENT_H_
 
+#include <linux/kconfig.h>
+
 /**************************************************************************
  *
  * The "environment" is stored as a list of '\0' terminated
@@ -16,10 +18,9 @@
  * shifts the remaining entries to the front. Replacing an entry is a
  * combination of deleting the old value and adding the new one.
  *
- * The environment is preceeded by a 32 bit CRC over the data part.
+ * The environment is preceded by a 32 bit CRC over the data part.
  *
- **************************************************************************
- */
+ *************************************************************************/
 
 #if defined(CONFIG_ENV_IS_IN_FLASH)
 # ifndef       CONFIG_ENV_ADDR
@@ -180,6 +181,15 @@ extern unsigned char env_get_char_spec(int);
 extern void env_reloc(void);
 #endif
 
+#ifdef CONFIG_ENV_IS_IN_MMC
+#include <mmc.h>
+
+extern int mmc_get_env_addr(struct mmc *mmc, int copy, u32 *env_addr);
+# ifdef CONFIG_SYS_MMC_ENV_PART
+extern uint mmc_get_env_part(struct mmc *mmc);
+# endif
+#endif
+
 #ifndef DO_DEPS_ONLY
 
 #include <env_attr.h>
@@ -187,15 +197,18 @@ extern void env_reloc(void);
 #include <env_flags.h>
 #include <search.h>
 
+/* Value for environment validity */
+enum env_valid {
+       ENV_INVALID,    /* No valid environment */
+       ENV_VALID,      /* First or only environment is valid */
+       ENV_REDUND,     /* Redundant environment is valid */
+};
+
 extern struct hsearch_data env_htab;
 
 /* Function that returns a character from the environment */
 unsigned char env_get_char(int);
 
-/* Function that returns a pointer to a value from the environment */
-const unsigned char *env_get_addr(int);
-unsigned char env_get_char_memory(int index);
-
 /* Function that updates CRC of the enironment */
 void env_crc_update(void);
 
@@ -214,6 +227,11 @@ int env_import(const char *buf, int check);
 /* Export from hash table into binary representation */
 int env_export(env_t *env_out);
 
+#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
+/* Select and import one of two redundant environments */
+int env_import_redund(const char *buf1, const char *buf2);
+#endif
+
 #endif /* DO_DEPS_ONLY */
 
 #endif /* _ENVIRONMENT_H_ */