mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-28 15:41:40 +00:00
c5cbbe35fd
Sometimes we use uchar and sometimes char for the default environment array. By always using char, we can get rid of some explicit casts. Signed-off-by: Marek Behún <marek.behun@nic.cz> Reviewed-by: Simon Glass <sjg@chromium.org>
251 lines
6.8 KiB
C
251 lines
6.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
|
|
/*
|
|
* Internal environment header file. This includes direct access to environment
|
|
* information such as its size and offset, direct access to the default
|
|
* environment and embedded environment (if used). It also provides environment
|
|
* drivers with various declarations.
|
|
*
|
|
* It should not be included by board files, drivers and code other than that
|
|
* related to the environment implementation.
|
|
*
|
|
* (C) Copyright 2002
|
|
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
|
*/
|
|
|
|
#ifndef _ENV_INTERNAL_H_
|
|
#define _ENV_INTERNAL_H_
|
|
|
|
#include <linux/kconfig.h>
|
|
|
|
/**************************************************************************
|
|
*
|
|
* The "environment" is stored as a list of '\0' terminated
|
|
* "name=value" strings. The end of the list is marked by a double
|
|
* '\0'. New entries are always added at the end. Deleting an entry
|
|
* 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 preceded by a 32 bit CRC over the data part.
|
|
*
|
|
*************************************************************************/
|
|
|
|
#if defined(CONFIG_ENV_IS_IN_FLASH)
|
|
# if defined(CONFIG_ENV_ADDR_REDUND) && \
|
|
((CONFIG_ENV_ADDR >= CONFIG_SYS_MONITOR_BASE) && \
|
|
(CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SIZE) <= \
|
|
(CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN))
|
|
# define ENV_IS_EMBEDDED
|
|
# 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
|
|
# endif
|
|
# ifdef CONFIG_ENV_IS_EMBEDDED
|
|
# error "do not define CONFIG_ENV_IS_EMBEDDED in your board config"
|
|
# error "it is calculated automatically for you"
|
|
# endif
|
|
#endif /* CONFIG_ENV_IS_IN_FLASH */
|
|
|
|
#if defined(CONFIG_ENV_IS_IN_NAND)
|
|
# if defined(CONFIG_ENV_OFFSET_OOB)
|
|
# ifdef CONFIG_ENV_OFFSET_REDUND
|
|
# error "CONFIG_ENV_OFFSET_REDUND is not supported when CONFIG_ENV_OFFSET_OOB"
|
|
# error "is set"
|
|
# endif
|
|
extern unsigned long nand_env_oob_offset;
|
|
# define CONFIG_ENV_OFFSET nand_env_oob_offset
|
|
# endif /* CONFIG_ENV_OFFSET_OOB */
|
|
#endif /* CONFIG_ENV_IS_IN_NAND */
|
|
|
|
/*
|
|
* For the flash types where embedded env is supported, but it cannot be
|
|
* calculated automatically (i.e. NAND), take the board opt-in.
|
|
*/
|
|
#if defined(CONFIG_ENV_IS_EMBEDDED) && !defined(ENV_IS_EMBEDDED)
|
|
# define ENV_IS_EMBEDDED
|
|
#endif
|
|
|
|
/* The build system likes to know if the env is embedded */
|
|
#ifdef DO_DEPS_ONLY
|
|
# ifdef ENV_IS_EMBEDDED
|
|
# ifndef CONFIG_ENV_IS_EMBEDDED
|
|
# define CONFIG_ENV_IS_EMBEDDED
|
|
# endif
|
|
# endif
|
|
#endif
|
|
|
|
#include "compiler.h"
|
|
|
|
#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
|
|
# define ENV_HEADER_SIZE (sizeof(uint32_t) + 1)
|
|
#else
|
|
# define ENV_HEADER_SIZE (sizeof(uint32_t))
|
|
#endif
|
|
|
|
#define ENV_SIZE (CONFIG_ENV_SIZE - ENV_HEADER_SIZE)
|
|
|
|
/*
|
|
* If the environment is in RAM, allocate extra space for it in the malloc
|
|
* region.
|
|
*/
|
|
#if defined(CONFIG_ENV_IS_EMBEDDED)
|
|
#define TOTAL_MALLOC_LEN CONFIG_SYS_MALLOC_LEN
|
|
#elif (CONFIG_ENV_ADDR + CONFIG_ENV_SIZE < CONFIG_SYS_MONITOR_BASE) || \
|
|
(CONFIG_ENV_ADDR >= CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN) || \
|
|
defined(CONFIG_ENV_IS_IN_NVRAM)
|
|
#define TOTAL_MALLOC_LEN (CONFIG_SYS_MALLOC_LEN + CONFIG_ENV_SIZE)
|
|
#else
|
|
#define TOTAL_MALLOC_LEN CONFIG_SYS_MALLOC_LEN
|
|
#endif
|
|
|
|
typedef struct environment_s {
|
|
uint32_t crc; /* CRC32 over data bytes */
|
|
#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
|
|
unsigned char flags; /* active/obsolete flags ENVF_REDUND_ */
|
|
#endif
|
|
unsigned char data[ENV_SIZE]; /* Environment data */
|
|
} env_t;
|
|
|
|
#ifdef ENV_IS_EMBEDDED
|
|
extern env_t embedded_environment;
|
|
#endif /* ENV_IS_EMBEDDED */
|
|
|
|
#ifdef DEFAULT_ENV_IS_RW
|
|
extern char default_environment[];
|
|
#else
|
|
extern const char default_environment[];
|
|
#endif
|
|
|
|
#ifndef DO_DEPS_ONLY
|
|
|
|
#include <env_attr.h>
|
|
#include <env_callback.h>
|
|
#include <env_flags.h>
|
|
#include <search.h>
|
|
|
|
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 */
|
|
ENVOP_ERASE, /* we want to call the erase function */
|
|
};
|
|
|
|
struct env_driver {
|
|
const char *name;
|
|
enum env_location location;
|
|
|
|
/**
|
|
* load() - Load the environment from storage
|
|
*
|
|
* This method is required for loading environment
|
|
*
|
|
* @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);
|
|
|
|
/**
|
|
* erase() - Erase the environment on storage
|
|
*
|
|
* This method is optional and required for 'eraseenv' to work.
|
|
*
|
|
* @return 0 if OK, -ve on error
|
|
*/
|
|
int (*erase)(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
|
|
|
|
#define ENV_SAVE_PTR(x) (CONFIG_IS_ENABLED(SAVEENV) ? (x) : NULL)
|
|
#define ENV_ERASE_PTR(x) (CONFIG_IS_ENABLED(CMD_ERASEENV) ? (x) : NULL)
|
|
|
|
extern struct hsearch_data env_htab;
|
|
|
|
/**
|
|
* env_ext4_get_intf() - Provide the interface for env in EXT4
|
|
*
|
|
* It is a weak function allowing board to overidde the default interface for
|
|
* U-Boot env in EXT4: CONFIG_ENV_EXT4_INTERFACE
|
|
*
|
|
* @return string of interface, empty if not supported
|
|
*/
|
|
const char *env_ext4_get_intf(void);
|
|
|
|
/**
|
|
* env_ext4_get_dev_part() - Provide the device and partition for env in EXT4
|
|
*
|
|
* It is a weak function allowing board to overidde the default device and
|
|
* partition used for U-Boot env in EXT4: CONFIG_ENV_EXT4_DEVICE_AND_PART
|
|
*
|
|
* @return string of device and partition
|
|
*/
|
|
const char *env_ext4_get_dev_part(void);
|
|
|
|
/**
|
|
* env_get_location()- Provide the best location for the U-Boot environment
|
|
*
|
|
* It is a weak function allowing board to overidde the environment location
|
|
*
|
|
* @op: operations performed on the environment
|
|
* @prio: priority between the multiple environments, 0 being the
|
|
* highest priority
|
|
* @return an enum env_location value on success, or -ve error code.
|
|
*/
|
|
enum env_location env_get_location(enum env_operation op, int prio);
|
|
#endif /* DO_DEPS_ONLY */
|
|
|
|
#endif /* _ENV_INTERNAL_H_ */
|