X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=include%2Fenvironment.h;h=7986a242778d1cc3cf37ea29953b4e74e01308f0;hb=5fba532954fe0363bcaa802ba4990e9466dc7d8c;hp=b602e8ac46b6be055e6811697023006b9f3b48fd;hpb=711b534120c0a5f73cdb9a25eb91f9aa0c5e09ab;p=u-boot

diff --git a/include/environment.h b/include/environment.h
index b602e8ac46..7986a24277 100644
--- 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
@@ -141,16 +143,7 @@ extern unsigned long nand_env_oob_offset;
 # define ENV_HEADER_SIZE	(sizeof(uint32_t))
 #endif
 
-#if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
-extern char *env_name_spec;
-#endif
-
-#ifdef CONFIG_ENV_AES
-/* Make sure the payload is multiple of AES block size */
-#define ENV_SIZE ((CONFIG_ENV_SIZE - ENV_HEADER_SIZE) & ~(16 - 1))
-#else
 #define ENV_SIZE (CONFIG_ENV_SIZE - ENV_HEADER_SIZE)
-#endif
 
 typedef struct environment_s {
 	uint32_t	crc;		/* CRC32 over data bytes	*/
@@ -158,12 +151,7 @@ typedef struct environment_s {
 	unsigned char	flags;		/* active/obsolete flags	*/
 #endif
 	unsigned char	data[ENV_SIZE]; /* Environment data		*/
-} env_t
-#ifdef CONFIG_ENV_AES
-/* Make sure the env is aligned to block size. */
-__attribute__((aligned(16)))
-#endif
-;
+} env_t;
 
 #ifdef ENV_IS_EMBEDDED
 extern env_t environment;
@@ -172,9 +160,6 @@ extern env_t environment;
 extern const unsigned char default_environment[];
 extern env_t *env_ptr;
 
-extern void env_relocate_spec(void);
-extern unsigned char env_get_char_spec(int);
-
 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
 extern void env_reloc(void);
 #endif
@@ -195,20 +180,97 @@ extern uint mmc_get_env_part(struct mmc *mmc);
 #include <env_flags.h>
 #include <search.h>
 
-extern struct hsearch_data env_htab;
+/* 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 */
+};
+
+enum env_location {
+	ENVL_UNKNOWN,
+	ENVL_EEPROM,
+	ENVL_EXT4,
+	ENVL_FAT,
+	ENVL_FLASH,
+	ENVL_MMC,
+	ENVL_NAND,
+	ENVL_NVRAM,
+	ENVL_ONENAND,
+	ENVL_REMOTE,
+	ENVL_SPI_FLASH,
+	ENVL_UBI,
+	ENVL_NOWHERE,
+
+	ENVL_COUNT,
+};
+
+/* value for the various operations we want to perform on the env */
+enum env_operation {
+	ENVOP_GET_CHAR,	/* we want to call the get_char function */
+	ENVOP_INIT,	/* we want to call the init function */
+	ENVOP_LOAD,	/* we want to call the load function */
+	ENVOP_SAVE,	/* we want to call the save function */
+};
+
+struct env_driver {
+	const char *name;
+	enum env_location location;
+
+	/**
+	 * load() - Load the environment from storage
+	 *
+	 * This method is optional. If not provided, no environment will be
+	 * loaded.
+	 *
+	 * @return 0 if OK, -ve on error
+	 */
+	int (*load)(void);
+
+	/**
+	 * save() - Save the environment to storage
+	 *
+	 * This method is required for 'saveenv' to work.
+	 *
+	 * @return 0 if OK, -ve on error
+	 */
+	int (*save)(void);
+
+	/**
+	 * init() - Set up the initial pre-relocation environment
+	 *
+	 * This method is optional.
+	 *
+	 * @return 0 if OK, -ENOENT if no initial environment could be found,
+	 * other -ve on error
+	 */
+	int (*init)(void);
+};
+
+/* Declare a new environment location driver */
+#define U_BOOT_ENV_LOCATION(__name)					\
+	ll_entry_declare(struct env_driver, __name, env_driver)
+
+/* Declare the name of a location */
+#ifdef CONFIG_CMD_SAVEENV
+#define ENV_NAME(_name) .name = _name,
+#else
+#define ENV_NAME(_name)
+#endif
 
-/* Function that returns a character from the environment */
-unsigned char env_get_char(int);
+#ifdef CONFIG_CMD_SAVEENV
+#define env_save_ptr(x) x
+#else
+#define env_save_ptr(x) NULL
+#endif
 
-/* 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);
+extern struct hsearch_data env_htab;
 
 /* Function that updates CRC of the enironment */
 void env_crc_update(void);
 
 /* Look up the variable from the default environment */
-char *getenv_default(const char *name);
+char *env_get_default(const char *name);
 
 /* [re]set to the default environment */
 void set_default_env(const char *s);
@@ -222,6 +284,36 @@ 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, int buf1_status,
+		      const char *buf2, int buf2_status);
+#endif
+
+/**
+ * env_get_char() - Get a character from the early environment
+ *
+ * This reads from the pre-relocation environemnt
+ *
+ * @index: Index of character to read (0 = first)
+ * @return character read, or -ve on error
+ */
+int env_get_char(int index);
+
+/**
+ * env_load() - Load the environment from storage
+ *
+ * @return 0 if OK, -ve on error
+ */
+int env_load(void);
+
+/**
+ * env_save() - Save the environment to storage
+ *
+ * @return 0 if OK, -ve on error
+ */
+int env_save(void);
+
 #endif /* DO_DEPS_ONLY */
 
 #endif /* _ENVIRONMENT_H_ */