273 lines
8.0 KiB
C
273 lines
8.0 KiB
C
/*
|
|
* NVRAM variable manipulation
|
|
*
|
|
* Copyright (C) 1999-2015, Broadcom Corporation
|
|
*
|
|
* Unless you and Broadcom execute a separate written software license
|
|
* agreement governing use of this software, this software is licensed to you
|
|
* under the terms of the GNU General Public License version 2 (the "GPL"),
|
|
* available at http://www.broadcom.com/licenses/GPLv2.php, with the
|
|
* following added to such license:
|
|
*
|
|
* As a special exception, the copyright holders of this software give you
|
|
* permission to link this software with independent modules, and to copy and
|
|
* distribute the resulting executable under terms of your choice, provided that
|
|
* you also meet, for each linked independent module, the terms and conditions of
|
|
* the license of that module. An independent module is a module which is not
|
|
* derived from this software. The special exception does not apply to any
|
|
* modifications of the software.
|
|
*
|
|
* Notwithstanding the above, under no circumstances may you combine this
|
|
* software in any way with any other Broadcom software provided under a license
|
|
* other than the GPL, without Broadcom's express prior written consent.
|
|
*
|
|
* $Id: bcmnvram.h 428512 2013-10-09 02:12:11Z $
|
|
*/
|
|
|
|
#ifndef _bcmnvram_h_
|
|
#define _bcmnvram_h_
|
|
|
|
#ifndef _LANGUAGE_ASSEMBLY
|
|
|
|
#include <typedefs.h>
|
|
#include <bcmdefs.h>
|
|
|
|
struct nvram_header {
|
|
uint32 magic;
|
|
uint32 len;
|
|
uint32 crc_ver_init; /* 0:7 crc, 8:15 ver, 16:31 sdram_init */
|
|
uint32 config_refresh; /* 0:15 sdram_config, 16:31 sdram_refresh */
|
|
uint32 config_ncdl; /* ncdl values for memc */
|
|
};
|
|
|
|
struct nvram_tuple {
|
|
char *name;
|
|
char *value;
|
|
struct nvram_tuple *next;
|
|
};
|
|
|
|
/*
|
|
* Get default value for an NVRAM variable
|
|
*/
|
|
extern char *nvram_default_get(const char *name);
|
|
/*
|
|
* validate/restore all per-interface related variables
|
|
*/
|
|
extern void nvram_validate_all(char *prefix, bool restore);
|
|
|
|
/*
|
|
* restore specific per-interface variable
|
|
*/
|
|
extern void nvram_restore_var(char *prefix, char *name);
|
|
|
|
/*
|
|
* Initialize NVRAM access. May be unnecessary or undefined on certain
|
|
* platforms.
|
|
*/
|
|
extern int nvram_init(void *sih);
|
|
extern int nvram_deinit(void *sih);
|
|
|
|
|
|
/*
|
|
* Append a chunk of nvram variables to the global list
|
|
*/
|
|
extern int nvram_append(void *si, char *vars, uint varsz);
|
|
|
|
extern void nvram_get_global_vars(char **varlst, uint *varsz);
|
|
|
|
|
|
/*
|
|
* Check for reset button press for restoring factory defaults.
|
|
*/
|
|
extern int nvram_reset(void *sih);
|
|
|
|
/*
|
|
* Disable NVRAM access. May be unnecessary or undefined on certain
|
|
* platforms.
|
|
*/
|
|
extern void nvram_exit(void *sih);
|
|
|
|
/*
|
|
* Get the value of an NVRAM variable. The pointer returned may be
|
|
* invalid after a set.
|
|
* @param name name of variable to get
|
|
* @return value of variable or NULL if undefined
|
|
*/
|
|
extern char * nvram_get(const char *name);
|
|
|
|
/*
|
|
* Read the reset GPIO value from the nvram and set the GPIO
|
|
* as input
|
|
*/
|
|
extern int nvram_resetgpio_init(void *sih);
|
|
|
|
/*
|
|
* Get the value of an NVRAM variable.
|
|
* @param name name of variable to get
|
|
* @return value of variable or NUL if undefined
|
|
*/
|
|
static INLINE char *
|
|
nvram_safe_get(const char *name)
|
|
{
|
|
char *p = nvram_get(name);
|
|
return p ? p : "";
|
|
}
|
|
|
|
/*
|
|
* Match an NVRAM variable.
|
|
* @param name name of variable to match
|
|
* @param match value to compare against value of variable
|
|
* @return TRUE if variable is defined and its value is string equal
|
|
* to match or FALSE otherwise
|
|
*/
|
|
static INLINE int
|
|
nvram_match(const char *name, const char *match)
|
|
{
|
|
const char *value = nvram_get(name);
|
|
return (value && !strcmp(value, match));
|
|
}
|
|
|
|
/*
|
|
* Inversely match an NVRAM variable.
|
|
* @param name name of variable to match
|
|
* @param match value to compare against value of variable
|
|
* @return TRUE if variable is defined and its value is not string
|
|
* equal to invmatch or FALSE otherwise
|
|
*/
|
|
static INLINE int
|
|
nvram_invmatch(const char *name, const char *invmatch)
|
|
{
|
|
const char *value = nvram_get(name);
|
|
return (value && strcmp(value, invmatch));
|
|
}
|
|
|
|
/*
|
|
* Set the value of an NVRAM variable. The name and value strings are
|
|
* copied into private storage. Pointers to previously set values
|
|
* may become invalid. The new value may be immediately
|
|
* retrieved but will not be permanently stored until a commit.
|
|
* @param name name of variable to set
|
|
* @param value value of variable
|
|
* @return 0 on success and errno on failure
|
|
*/
|
|
extern int nvram_set(const char *name, const char *value);
|
|
|
|
/*
|
|
* Unset an NVRAM variable. Pointers to previously set values
|
|
* remain valid until a set.
|
|
* @param name name of variable to unset
|
|
* @return 0 on success and errno on failure
|
|
* NOTE: use nvram_commit to commit this change to flash.
|
|
*/
|
|
extern int nvram_unset(const char *name);
|
|
|
|
/*
|
|
* Commit NVRAM variables to permanent storage. All pointers to values
|
|
* may be invalid after a commit.
|
|
* NVRAM values are undefined after a commit.
|
|
* @param nvram_corrupt true to corrupt nvram, false otherwise.
|
|
* @return 0 on success and errno on failure
|
|
*/
|
|
extern int nvram_commit_internal(bool nvram_corrupt);
|
|
|
|
/*
|
|
* Commit NVRAM variables to permanent storage. All pointers to values
|
|
* may be invalid after a commit.
|
|
* NVRAM values are undefined after a commit.
|
|
* @return 0 on success and errno on failure
|
|
*/
|
|
extern int nvram_commit(void);
|
|
|
|
/*
|
|
* Get all NVRAM variables (format name=value\0 ... \0\0).
|
|
* @param buf buffer to store variables
|
|
* @param count size of buffer in bytes
|
|
* @return 0 on success and errno on failure
|
|
*/
|
|
extern int nvram_getall(char *nvram_buf, int count);
|
|
|
|
/*
|
|
* returns the crc value of the nvram
|
|
* @param nvh nvram header pointer
|
|
*/
|
|
uint8 nvram_calc_crc(struct nvram_header * nvh);
|
|
|
|
extern int nvram_space;
|
|
#endif /* _LANGUAGE_ASSEMBLY */
|
|
|
|
/* The NVRAM version number stored as an NVRAM variable */
|
|
#define NVRAM_SOFTWARE_VERSION "1"
|
|
|
|
#define NVRAM_MAGIC 0x48534C46 /* 'FLSH' */
|
|
#define NVRAM_CLEAR_MAGIC 0x0
|
|
#define NVRAM_INVALID_MAGIC 0xFFFFFFFF
|
|
#define NVRAM_VERSION 1
|
|
#define NVRAM_HEADER_SIZE 20
|
|
/* This definition is for precommit staging, and will be removed */
|
|
#define NVRAM_SPACE 0x8000
|
|
/* For CFE builds this gets passed in thru the makefile */
|
|
#ifndef MAX_NVRAM_SPACE
|
|
#define MAX_NVRAM_SPACE 0x10000
|
|
#endif
|
|
#define DEF_NVRAM_SPACE 0x8000
|
|
#define ROM_ENVRAM_SPACE 0x1000
|
|
#define NVRAM_LZMA_MAGIC 0x4c5a4d41 /* 'LZMA' */
|
|
|
|
#define NVRAM_MAX_VALUE_LEN 255
|
|
#define NVRAM_MAX_PARAM_LEN 64
|
|
|
|
#define NVRAM_CRC_START_POSITION 9 /* magic, len, crc8 to be skipped */
|
|
#define NVRAM_CRC_VER_MASK 0xffffff00 /* for crc_ver_init */
|
|
|
|
/* Offsets to embedded nvram area */
|
|
#define NVRAM_START_COMPRESSED 0x400
|
|
#define NVRAM_START 0x1000
|
|
|
|
#define BCM_JUMBO_NVRAM_DELIMIT '\n'
|
|
#define BCM_JUMBO_START "Broadcom Jumbo Nvram file"
|
|
|
|
|
|
#if (defined(FAILSAFE_UPGRADE) || defined(CONFIG_FAILSAFE_UPGRADE) || \
|
|
defined(__CONFIG_FAILSAFE_UPGRADE_SUPPORT__))
|
|
#define IMAGE_SIZE "image_size"
|
|
#define BOOTPARTITION "bootpartition"
|
|
#define IMAGE_BOOT BOOTPARTITION
|
|
#define PARTIALBOOTS "partialboots"
|
|
#define MAXPARTIALBOOTS "maxpartialboots"
|
|
#define IMAGE_1ST_FLASH_TRX "flash0.trx"
|
|
#define IMAGE_1ST_FLASH_OS "flash0.os"
|
|
#define IMAGE_2ND_FLASH_TRX "flash0.trx2"
|
|
#define IMAGE_2ND_FLASH_OS "flash0.os2"
|
|
#define IMAGE_FIRST_OFFSET "image_first_offset"
|
|
#define IMAGE_SECOND_OFFSET "image_second_offset"
|
|
#define LINUX_FIRST "linux"
|
|
#define LINUX_SECOND "linux2"
|
|
#endif
|
|
|
|
#if (defined(DUAL_IMAGE) || defined(CONFIG_DUAL_IMAGE) || \
|
|
defined(__CONFIG_DUAL_IMAGE_FLASH_SUPPORT__))
|
|
/* Shared by all: CFE, Linux Kernel, and Ap */
|
|
#define IMAGE_BOOT "image_boot"
|
|
#define BOOTPARTITION IMAGE_BOOT
|
|
/* CFE variables */
|
|
#define IMAGE_1ST_FLASH_TRX "flash0.trx"
|
|
#define IMAGE_1ST_FLASH_OS "flash0.os"
|
|
#define IMAGE_2ND_FLASH_TRX "flash0.trx2"
|
|
#define IMAGE_2ND_FLASH_OS "flash0.os2"
|
|
#define IMAGE_SIZE "image_size"
|
|
|
|
/* CFE and Linux Kernel shared variables */
|
|
#define IMAGE_FIRST_OFFSET "image_first_offset"
|
|
#define IMAGE_SECOND_OFFSET "image_second_offset"
|
|
|
|
/* Linux application variables */
|
|
#define LINUX_FIRST "linux"
|
|
#define LINUX_SECOND "linux2"
|
|
#define POLICY_TOGGLE "toggle"
|
|
#define LINUX_PART_TO_FLASH "linux_to_flash"
|
|
#define LINUX_FLASH_POLICY "linux_flash_policy"
|
|
|
|
#endif /* defined(DUAL_IMAGE||CONFIG_DUAL_IMAGE)||__CONFIG_DUAL_IMAGE_FLASH_SUPPORT__ */
|
|
|
|
#endif /* _bcmnvram_h_ */
|