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https://github.com/AsahiLinux/u-boot
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2f96b3238c
Check the current ENV location, dynamically provided by the weak function env_get_location to be sure that the environment can be persistent. The compilation flag ENV_IS_IN_DEVICE is not enough when the board dynamically select the available storage location (according boot device for example). This patch solves issue for stm32mp1 platform, when the boot device is USB. Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Tom Rini <trini@konsulko.com>
227 lines
6.1 KiB
C
227 lines
6.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Internal environment header file. This includes direct access to environment
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* information such as its size and offset, direct access to the default
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* environment and embedded environment (if used). It also provides environment
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* drivers with various declarations.
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*
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* It should not be included by board files, drivers and code other than that
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* related to the environment implementation.
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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 _ENV_INTERNAL_H_
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#define _ENV_INTERNAL_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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# if defined(CONFIG_ENV_ADDR_REDUND) && \
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((CONFIG_ENV_ADDR >= CONFIG_SYS_MONITOR_BASE) && \
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(CONFIG_ENV_ADDR_REDUND + 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 (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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# 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_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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# endif /* CONFIG_ENV_OFFSET_OOB */
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#endif /* CONFIG_ENV_IS_IN_NAND */
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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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/*
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* If the environment is in RAM, allocate extra space for it in the malloc
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* region.
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*/
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#if defined(CONFIG_ENV_IS_EMBEDDED)
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#define TOTAL_MALLOC_LEN CONFIG_SYS_MALLOC_LEN
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#elif (CONFIG_ENV_ADDR + CONFIG_ENV_SIZE < CONFIG_SYS_MONITOR_BASE) || \
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(CONFIG_ENV_ADDR >= CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN) || \
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defined(CONFIG_ENV_IS_IN_NVRAM)
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#define TOTAL_MALLOC_LEN (CONFIG_SYS_MALLOC_LEN + CONFIG_ENV_SIZE)
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#else
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#define TOTAL_MALLOC_LEN CONFIG_SYS_MALLOC_LEN
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#endif
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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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#define ENV_SAVE_PTR(x) (CONFIG_IS_ENABLED(SAVEENV) ? (x) : NULL)
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extern struct hsearch_data env_htab;
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/**
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* env_get_location()- Provide the best location for the U-Boot environment
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*
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* It is a weak function allowing board to overidde the environment location
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*
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* @op: operations performed on the environment
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* @prio: priority between the multiple environments, 0 being the
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* highest priority
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* @return an enum env_location value on success, or -ve error code.
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*/
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enum env_location env_get_location(enum env_operation op, int prio);
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#endif /* DO_DEPS_ONLY */
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#endif /* _ENV_INTERNAL_H_ */
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