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/* Copyright 2012 Google Inc. All Rights Reserved.
* Author: weixiaofeng@google.com (Xiaofeng Wei)
*/
#ifndef _SYSVAR_H_
#define _SYSVAR_H_
//#define SYSVAR_UBOOT
#ifndef SYSVAR_UBOOT
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#else
typedef enum _bool{false, true} bool;
#endif
#include <malloc.h>
#define SYSVAR_WC32 4
#define SYSVAR_CRC32 4
#define SYSVAR_HEAD (SYSVAR_WC32 + SYSVAR_CRC32)
#define SYSVAR_NAME 32
#define SYSVAR_MESSAGE -1
#define SYSVAR_STR_TO_BUF 0x00
#define SYSVAR_BUF_TO_STR 0xff
#define SYSVAR_BLOCK_SIZE 0x00010000 /* size of system variables (64K) */
#define SYSVAR_SPI_BLOCK 4 /* number of SPI flash blocks */
#define SYSVAR_RW_OFFSET0 0x00100000 /* location of system variables(RW) */
#define SYSVAR_RW_OFFSET1 0x00120000 /* location of system variables(RW backup) */
#define SYSVAR_RO_OFFSET0 0x00140000 /* location of system variables(RO) */
#define SYSVAR_RO_OFFSET1 0x00160000 /* location of system variables(RO backup) */
#define SYSVAR_MTD_DEVICE 4 /* maximum number of MTD devices. */
#define SYSVAR_RW_NAME0 "/dev/mtd2" /* MTD device of system variables(RW) */
#define SYSVAR_RW_NAME1 "/dev/mtd3" /* MTD device of system variables(RW backup) */
#define SYSVAR_RO_NAME0 "/dev/mtd4" /* MTD device of system variables(RO) */
#define SYSVAR_RO_NAME1 "/dev/mtd5" /* MTD device of system variables(RO backup) */
#define SYSVAR_RW_DATA0 0
#define SYSVAR_RW_DATA1 1
#define SYSVAR_RO_DATA0 2
#define SYSVAR_RO_DATA1 3
#define SYSVAR_RW_BUF 0
#define SYSVAR_RO_BUF 2
#define SYSVAR_GET_MODE 0
#define SYSVAR_SET_MODE 1
#define SYSVAR_LOAD_MODE 2
#define SYSVAR_SAVE_MODE 3
#define SYSVAR_SUCCESS 0
#define SYSVAR_MEMORY_ERR -1
#define SYSVAR_OPEN_ERR -2
#define SYSVAR_READ_ERR -3
#define SYSVAR_WRITE_ERR -4
#define SYSVAR_ERASE_ERR -5
#define SYSVAR_LOAD_ERR -6
#define SYSVAR_SAVE_ERR -7
#define SYSVAR_GET_ERR -8
#define SYSVAR_SET_ERR -9
#define SYSVAR_DELETE_ERR -10
#define SYSVAR_PARAM_ERR -11
#define SYSVAR_CRC_ERR -12
#define SYSVAR_READONLY_ERR -13
#define SYSVAR_EXISTED_ERR -14
#define SYSVAR_DEBUG_ERR -15
struct sysvar_list {
char name[SYSVAR_NAME + 1]; /* name of system variable */
char *value; /* value of system variable */
int len; /* length of system variable */
struct sysvar_list *next;
};
struct sysvar_buf {
unsigned char *data; /* data buffer to store system variables */
int data_len; /* buffer size */
int total_len; /* total space = buffer size - buffer header */
int free_len; /* free space in data buffer */
int used_len; /* total bytes of variables */
bool loaded; /* data buffer has been loaded from SPI flash */
bool modified; /* data modified in the data buffer */
bool readonly; /* read only system variables */
bool failed[2]; /* failed to read data from SPI flash */
struct sysvar_list *list;
};
extern unsigned long get_wc32(struct sysvar_buf *buf);
extern void set_wc32(struct sysvar_buf *buf);
extern unsigned long get_crc32(struct sysvar_buf *buf);
extern void set_crc32(struct sysvar_buf *buf);
extern int load_var(struct sysvar_buf *buf);
extern int save_var(struct sysvar_buf *buf);
extern int get_var(struct sysvar_list *var, char *name, char *value, int len);
extern int set_var(struct sysvar_buf *buf, char *name, char *value);
extern int delete_var(struct sysvar_buf *buf, struct sysvar_list *var);
extern int clear_var(struct sysvar_buf *buf);
extern struct sysvar_list *find_var(struct sysvar_buf *buf, char *name);
extern int check_var(struct sysvar_buf *buf, int mode);
extern void print_var(struct sysvar_buf *buf);
extern void clear_buf(struct sysvar_buf *buf);
extern void dump_buf(struct sysvar_buf *buf, int start, int len);
#endif /* _SYSVAR_H_ */