* (C) Copyright 2002
* Wolfgang Denk, DENX Software Engineering, wd@denx.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
+ * SPDX-License-Identifier: GPL-2.0+
*/
#ifndef _ENVIRONMENT_H_
-#define _ENVIRONMENT_H_ 1
+#define _ENVIRONMENT_H_
+
+#include <linux/kconfig.h>
/**************************************************************************
*
* 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
-# define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
+# ifndef CONFIG_ENV_ADDR
+# define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
# endif
-# ifndef CONFIG_ENV_OFFSET
-# define CONFIG_ENV_OFFSET (CONFIG_ENV_ADDR - CONFIG_SYS_FLASH_BASE)
+# ifndef CONFIG_ENV_OFFSET
+# define CONFIG_ENV_OFFSET (CONFIG_ENV_ADDR - CONFIG_SYS_FLASH_BASE)
# endif
# if !defined(CONFIG_ENV_ADDR_REDUND) && defined(CONFIG_ENV_OFFSET_REDUND)
-# define CONFIG_ENV_ADDR_REDUND (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET_REDUND)
+# define CONFIG_ENV_ADDR_REDUND \
+ (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET_REDUND)
# endif
# if defined(CONFIG_ENV_SECT_SIZE) || defined(CONFIG_ENV_SIZE)
-# ifndef CONFIG_ENV_SECT_SIZE
-# define CONFIG_ENV_SECT_SIZE CONFIG_ENV_SIZE
+# ifndef CONFIG_ENV_SECT_SIZE
+# define CONFIG_ENV_SECT_SIZE CONFIG_ENV_SIZE
# endif
-# ifndef CONFIG_ENV_SIZE
-# define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE
+# ifndef CONFIG_ENV_SIZE
+# define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE
# endif
# else
# error "Both CONFIG_ENV_SECT_SIZE and CONFIG_ENV_SIZE undefined"
# if defined(CONFIG_ENV_ADDR_REDUND) && !defined(CONFIG_ENV_SIZE_REDUND)
# define CONFIG_ENV_SIZE_REDUND CONFIG_ENV_SIZE
# endif
-# if (CONFIG_ENV_ADDR >= CONFIG_SYS_MONITOR_BASE) && \
- (CONFIG_ENV_ADDR+CONFIG_ENV_SIZE) <= (CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN)
-# define ENV_IS_EMBEDDED 1
+# if (CONFIG_ENV_ADDR >= CONFIG_SYS_MONITOR_BASE) && \
+ (CONFIG_ENV_ADDR + CONFIG_ENV_SIZE) <= \
+ (CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN)
+# define ENV_IS_EMBEDDED
# endif
# if defined(CONFIG_ENV_ADDR_REDUND) || defined(CONFIG_ENV_OFFSET_REDUND)
-# define CONFIG_SYS_REDUNDAND_ENVIRONMENT 1
+# define CONFIG_SYS_REDUNDAND_ENVIRONMENT
# endif
# ifdef CONFIG_ENV_IS_EMBEDDED
# error "do not define CONFIG_ENV_IS_EMBEDDED in your board config"
# endif
#endif /* CONFIG_ENV_IS_IN_FLASH */
+#if defined(CONFIG_ENV_IS_IN_MMC)
+# ifdef CONFIG_ENV_OFFSET_REDUND
+# define CONFIG_SYS_REDUNDAND_ENVIRONMENT
+# endif
+#endif
+
#if defined(CONFIG_ENV_IS_IN_NAND)
# if defined(CONFIG_ENV_OFFSET_OOB)
# ifdef CONFIG_ENV_OFFSET_REDUND
# endif
#endif /* CONFIG_ENV_IS_IN_NAND */
-#if defined(CONFIG_ENV_IS_IN_MG_DISK)
-# ifndef CONFIG_ENV_ADDR
-# error "Need to define CONFIG_ENV_ADDR when using CONFIG_ENV_IS_IN_MG_DISK"
+#if defined(CONFIG_ENV_IS_IN_UBI)
+# ifndef CONFIG_ENV_UBI_PART
+# error "Need to define CONFIG_ENV_UBI_PART when using CONFIG_ENV_IS_IN_UBI"
+# endif
+# ifndef CONFIG_ENV_UBI_VOLUME
+# error "Need to define CONFIG_ENV_UBI_VOLUME when using CONFIG_ENV_IS_IN_UBI"
+# endif
+# if defined(CONFIG_ENV_UBI_VOLUME_REDUND)
+# define CONFIG_SYS_REDUNDAND_ENVIRONMENT
# endif
# ifndef CONFIG_ENV_SIZE
-# error "Need to define CONFIG_ENV_SIZE when using CONFIG_ENV_IS_IN_MG_DISK"
+# error "Need to define CONFIG_ENV_SIZE when using CONFIG_ENV_IS_IN_UBI"
# endif
-#endif /* CONFIG_ENV_IS_IN_MG_DISK */
+# ifndef CONFIG_CMD_UBI
+# error "Need to define CONFIG_CMD_UBI when using CONFIG_ENV_IS_IN_UBI"
+# endif
+#endif /* CONFIG_ENV_IS_IN_UBI */
/* Embedded env is only supported for some flash types */
#ifdef CONFIG_ENV_IS_EMBEDDED
-# if !defined(CONFIG_ENV_IS_IN_FLASH) && \
- !defined(CONFIG_ENV_IS_IN_NAND) && \
- !defined(CONFIG_ENV_IS_IN_ONENAND) && \
- !defined(CONFIG_ENV_IS_IN_SPI_FLASH)
+# if !defined(CONFIG_ENV_IS_IN_FLASH) && \
+ !defined(CONFIG_ENV_IS_IN_NAND) && \
+ !defined(CONFIG_ENV_IS_IN_ONENAND) && \
+ !defined(CONFIG_ENV_IS_IN_SPI_FLASH)
# error "CONFIG_ENV_IS_EMBEDDED not supported for your flash type"
# endif
#endif
* calculated automatically (i.e. NAND), take the board opt-in.
*/
#if defined(CONFIG_ENV_IS_EMBEDDED) && !defined(ENV_IS_EMBEDDED)
-# define ENV_IS_EMBEDDED 1
+# define ENV_IS_EMBEDDED
#endif
/* The build system likes to know if the env is embedded */
# define ENV_HEADER_SIZE (sizeof(uint32_t))
#endif
-
#define ENV_SIZE (CONFIG_ENV_SIZE - ENV_HEADER_SIZE)
-typedef struct environment_s {
+typedef struct environment_s {
uint32_t crc; /* CRC32 over data bytes */
#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
unsigned char flags; /* active/obsolete flags */
unsigned char data[ENV_SIZE]; /* Environment data */
} env_t;
+#ifdef ENV_IS_EMBEDDED
+extern env_t environment;
+#endif /* ENV_IS_EMBEDDED */
+
+extern const unsigned char default_environment[];
+extern env_t *env_ptr;
+
+#if defined(CONFIG_NEEDS_MANUAL_RELOC)
+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>
+#include <env_callback.h>
+#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_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,
+ ENVL_UNKNOWN,
+};
+
+/* 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;
+
+ /**
+ * get_char() - Read a character from the environment
+ *
+ * This method is optional. If not provided, a default implementation
+ * will read from gd->env_addr.
+ *
+ * @index: Index of character to read (0=first)
+ * @return character read, or -ve on error
+ */
+ int (*get_char)(int index);
-/* Function that returns a character from the environment */
-unsigned char env_get_char (int);
+ /**
+ * 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);
-/* 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);
+ /**
+ * 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
+
+#ifdef CONFIG_CMD_SAVEENV
+#define env_save_ptr(x) x
+#else
+#define env_save_ptr(x) NULL
+#endif
+
+extern struct hsearch_data env_htab;
/* Function that updates CRC of the enironment */
-void env_crc_update (void);
+void env_crc_update(void);
+
+/* Look up the variable from the default environment */
+char *env_get_default(const char *name);
/* [re]set to the default environment */
void set_default_env(const char *s);
+/* [re]set individual variables to their value in the default environment */
+int set_default_vars(int nvars, char * const vars[]);
+
/* Import from binary representation into hash table */
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 /* _ENVIRONMENT_H_ */
+/**
+ * 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_ */
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