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d3716dd64b
Add an ENV prefix to these two flags so that it is clear what they relate to. Also move them to env.h since they are part of the public API. Use an enum rather than a #define to tie them together. Signed-off-by: Simon Glass <sjg@chromium.org>
256 lines
6.8 KiB
C
256 lines
6.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* (C) Copyright 2002
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*/
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#ifndef _ENVIRONMENT_H_
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#define _ENVIRONMENT_H_
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#include <linux/kconfig.h>
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/**************************************************************************
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*
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* The "environment" is stored as a list of '\0' terminated
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* "name=value" strings. The end of the list is marked by a double
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* '\0'. New entries are always added at the end. Deleting an entry
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* shifts the remaining entries to the front. Replacing an entry is a
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* combination of deleting the old value and adding the new one.
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*
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* The environment is preceded by a 32 bit CRC over the data part.
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*
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*************************************************************************/
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#if defined(CONFIG_ENV_IS_IN_FLASH)
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# ifndef CONFIG_ENV_ADDR
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# define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
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# endif
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# ifndef CONFIG_ENV_OFFSET
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# define CONFIG_ENV_OFFSET (CONFIG_ENV_ADDR - CONFIG_SYS_FLASH_BASE)
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# endif
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# if !defined(CONFIG_ENV_ADDR_REDUND) && defined(CONFIG_ENV_OFFSET_REDUND)
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# define CONFIG_ENV_ADDR_REDUND \
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(CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET_REDUND)
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# endif
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# if defined(CONFIG_ENV_SECT_SIZE) || defined(CONFIG_ENV_SIZE)
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# ifndef CONFIG_ENV_SECT_SIZE
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# define CONFIG_ENV_SECT_SIZE CONFIG_ENV_SIZE
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# endif
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# ifndef CONFIG_ENV_SIZE
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# define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE
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# endif
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# else
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# error "Both CONFIG_ENV_SECT_SIZE and CONFIG_ENV_SIZE undefined"
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# endif
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# if defined(CONFIG_ENV_ADDR_REDUND) && !defined(CONFIG_ENV_SIZE_REDUND)
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# define CONFIG_ENV_SIZE_REDUND CONFIG_ENV_SIZE
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# endif
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# if (CONFIG_ENV_ADDR >= CONFIG_SYS_MONITOR_BASE) && \
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(CONFIG_ENV_ADDR + CONFIG_ENV_SIZE) <= \
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(CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN)
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# define ENV_IS_EMBEDDED
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# endif
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# if defined(CONFIG_ENV_ADDR_REDUND) || defined(CONFIG_ENV_OFFSET_REDUND)
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# define CONFIG_SYS_REDUNDAND_ENVIRONMENT
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# endif
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# ifdef CONFIG_ENV_IS_EMBEDDED
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# error "do not define CONFIG_ENV_IS_EMBEDDED in your board config"
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# error "it is calculated automatically for you"
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# endif
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#endif /* CONFIG_ENV_IS_IN_FLASH */
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#if defined(CONFIG_ENV_IS_IN_MMC)
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# ifdef CONFIG_ENV_OFFSET_REDUND
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# define CONFIG_SYS_REDUNDAND_ENVIRONMENT
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# endif
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#endif
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#if defined(CONFIG_ENV_IS_IN_NAND)
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# if defined(CONFIG_ENV_OFFSET_OOB)
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# ifdef CONFIG_ENV_OFFSET_REDUND
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# error "CONFIG_ENV_OFFSET_REDUND is not supported when CONFIG_ENV_OFFSET_OOB"
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# error "is set"
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# endif
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extern unsigned long nand_env_oob_offset;
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# define CONFIG_ENV_OFFSET nand_env_oob_offset
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# else
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# ifndef CONFIG_ENV_OFFSET
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# error "Need to define CONFIG_ENV_OFFSET when using CONFIG_ENV_IS_IN_NAND"
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# endif
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# ifdef CONFIG_ENV_OFFSET_REDUND
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# define CONFIG_SYS_REDUNDAND_ENVIRONMENT
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# endif
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# endif /* CONFIG_ENV_OFFSET_OOB */
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# ifndef CONFIG_ENV_SIZE
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# error "Need to define CONFIG_ENV_SIZE when using CONFIG_ENV_IS_IN_NAND"
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# endif
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#endif /* CONFIG_ENV_IS_IN_NAND */
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#if defined(CONFIG_ENV_IS_IN_UBI)
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# ifndef CONFIG_ENV_UBI_PART
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# error "Need to define CONFIG_ENV_UBI_PART when using CONFIG_ENV_IS_IN_UBI"
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# endif
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# ifndef CONFIG_ENV_UBI_VOLUME
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# error "Need to define CONFIG_ENV_UBI_VOLUME when using CONFIG_ENV_IS_IN_UBI"
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# endif
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# if defined(CONFIG_ENV_UBI_VOLUME_REDUND)
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# define CONFIG_SYS_REDUNDAND_ENVIRONMENT
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# endif
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# ifndef CONFIG_ENV_SIZE
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# error "Need to define CONFIG_ENV_SIZE when using CONFIG_ENV_IS_IN_UBI"
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# endif
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# ifndef CONFIG_CMD_UBI
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# error "Need to define CONFIG_CMD_UBI when using CONFIG_ENV_IS_IN_UBI"
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# endif
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#endif /* CONFIG_ENV_IS_IN_UBI */
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/* Embedded env is only supported for some flash types */
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#ifdef CONFIG_ENV_IS_EMBEDDED
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# if !defined(CONFIG_ENV_IS_IN_FLASH) && \
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!defined(CONFIG_ENV_IS_IN_NAND) && \
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!defined(CONFIG_ENV_IS_IN_ONENAND) && \
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!defined(CONFIG_ENV_IS_IN_SPI_FLASH)
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# error "CONFIG_ENV_IS_EMBEDDED not supported for your flash type"
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# endif
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#endif
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/*
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* For the flash types where embedded env is supported, but it cannot be
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* calculated automatically (i.e. NAND), take the board opt-in.
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*/
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#if defined(CONFIG_ENV_IS_EMBEDDED) && !defined(ENV_IS_EMBEDDED)
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# define ENV_IS_EMBEDDED
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#endif
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/* The build system likes to know if the env is embedded */
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#ifdef DO_DEPS_ONLY
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# ifdef ENV_IS_EMBEDDED
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# ifndef CONFIG_ENV_IS_EMBEDDED
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# define CONFIG_ENV_IS_EMBEDDED
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# endif
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# endif
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#endif
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#include "compiler.h"
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#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
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# define ENV_HEADER_SIZE (sizeof(uint32_t) + 1)
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#else
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# define ENV_HEADER_SIZE (sizeof(uint32_t))
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#endif
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#define ENV_SIZE (CONFIG_ENV_SIZE - ENV_HEADER_SIZE)
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typedef struct environment_s {
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uint32_t crc; /* CRC32 over data bytes */
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#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
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unsigned char flags; /* active/obsolete flags ENVF_REDUND_ */
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#endif
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unsigned char data[ENV_SIZE]; /* Environment data */
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} env_t;
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#ifdef ENV_IS_EMBEDDED
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extern env_t embedded_environment;
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#endif /* ENV_IS_EMBEDDED */
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extern const unsigned char default_environment[];
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#ifndef DO_DEPS_ONLY
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#include <env_attr.h>
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#include <env_callback.h>
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#include <env_flags.h>
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#include <search.h>
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enum env_location {
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ENVL_UNKNOWN,
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ENVL_EEPROM,
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ENVL_EXT4,
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ENVL_FAT,
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ENVL_FLASH,
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ENVL_MMC,
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ENVL_NAND,
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ENVL_NVRAM,
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ENVL_ONENAND,
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ENVL_REMOTE,
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ENVL_SPI_FLASH,
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ENVL_UBI,
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ENVL_NOWHERE,
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ENVL_COUNT,
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};
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/* value for the various operations we want to perform on the env */
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enum env_operation {
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ENVOP_GET_CHAR, /* we want to call the get_char function */
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ENVOP_INIT, /* we want to call the init function */
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ENVOP_LOAD, /* we want to call the load function */
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ENVOP_SAVE, /* we want to call the save function */
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ENVOP_ERASE, /* we want to call the erase function */
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};
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struct env_driver {
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const char *name;
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enum env_location location;
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/**
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* load() - Load the environment from storage
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*
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* This method is optional. If not provided, no environment will be
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* loaded.
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*
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* @return 0 if OK, -ve on error
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*/
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int (*load)(void);
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/**
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* save() - Save the environment to storage
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*
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* This method is required for 'saveenv' to work.
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*
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* @return 0 if OK, -ve on error
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*/
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int (*save)(void);
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/**
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* erase() - Erase the environment on storage
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*
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* This method is optional and required for 'eraseenv' to work.
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*
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* @return 0 if OK, -ve on error
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*/
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int (*erase)(void);
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/**
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* init() - Set up the initial pre-relocation environment
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*
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* This method is optional.
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*
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* @return 0 if OK, -ENOENT if no initial environment could be found,
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* other -ve on error
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*/
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int (*init)(void);
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};
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/* Declare a new environment location driver */
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#define U_BOOT_ENV_LOCATION(__name) \
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ll_entry_declare(struct env_driver, __name, env_driver)
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/* Declare the name of a location */
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#ifdef CONFIG_CMD_SAVEENV
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#define ENV_NAME(_name) .name = _name,
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#else
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#define ENV_NAME(_name)
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#endif
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#ifdef CONFIG_CMD_SAVEENV
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#define env_save_ptr(x) x
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#else
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#define env_save_ptr(x) NULL
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#endif
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extern struct hsearch_data env_htab;
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#endif /* DO_DEPS_ONLY */
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#endif /* _ENVIRONMENT_H_ */
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