190 lines
5.8 KiB
C
190 lines
5.8 KiB
C
/*
|
|
* (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
|
|
*/
|
|
|
|
#ifndef _ENVIRONMENT_H_
|
|
#define _ENVIRONMENT_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 preceeded 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)
|
|
# endif
|
|
# 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)
|
|
# endif
|
|
# if defined(CONFIG_ENV_SECT_SIZE) || defined(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
|
|
# endif
|
|
# else
|
|
# error "Both CONFIG_ENV_SECT_SIZE and CONFIG_ENV_SIZE undefined"
|
|
# endif
|
|
# 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
|
|
# endif
|
|
# if defined(CONFIG_ENV_ADDR_REDUND) || defined(CONFIG_ENV_OFFSET_REDUND)
|
|
# define CONFIG_SYS_REDUNDAND_ENVIRONMENT
|
|
# 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
|
|
# else
|
|
# ifndef CONFIG_ENV_OFFSET
|
|
# error "Need to define CONFIG_ENV_OFFSET when using CONFIG_ENV_IS_IN_NAND"
|
|
# endif
|
|
# ifdef CONFIG_ENV_OFFSET_REDUND
|
|
# define CONFIG_SYS_REDUNDAND_ENVIRONMENT
|
|
# endif
|
|
# endif /* CONFIG_ENV_OFFSET_OOB */
|
|
# ifndef CONFIG_ENV_SIZE
|
|
# error "Need to define CONFIG_ENV_SIZE when using CONFIG_ENV_IS_IN_NAND"
|
|
# endif
|
|
#endif /* CONFIG_ENV_IS_IN_NAND */
|
|
|
|
/* 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)
|
|
# error "CONFIG_ENV_IS_EMBEDDED not supported for your flash type"
|
|
# endif
|
|
#endif
|
|
|
|
/*
|
|
* 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)
|
|
|
|
# define ACTIVE_FLAG 1
|
|
# define OBSOLETE_FLAG 0
|
|
#else
|
|
# define ENV_HEADER_SIZE (sizeof(uint32_t))
|
|
#endif
|
|
|
|
#if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
|
|
extern char *env_name_spec;
|
|
#endif
|
|
|
|
#define ENV_SIZE (CONFIG_ENV_SIZE - ENV_HEADER_SIZE)
|
|
|
|
typedef struct environment_s {
|
|
uint32_t crc; /* CRC32 over data bytes */
|
|
#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
|
|
unsigned char flags; /* active/obsolete flags */
|
|
#endif
|
|
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;
|
|
|
|
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
|
|
|
|
#ifndef DO_DEPS_ONLY
|
|
|
|
#include <search.h>
|
|
|
|
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);
|
|
|
|
/* [re]set to the default environment */
|
|
void set_default_env(const char *s);
|
|
|
|
/* Import from binary representation into hash table */
|
|
int env_import(const char *buf, int check);
|
|
|
|
#endif /* DO_DEPS_ONLY */
|
|
|
|
#endif /* _ENVIRONMENT_H_ */
|