83 lines
2.6 KiB
C
83 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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#ifndef __FW_ENV_H__
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#define __FW_ENV_H__
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#include <stdint.h>
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#include <stddef.h>
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#include <sys/types.h> // 引入标准类型头文件
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// 基础类型定义
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typedef uint32_t u32;
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typedef uint8_t u8;
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typedef int32_t s32;
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typedef unsigned long ulong; // 关键：显式定义ulong类型
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// 环境变量核心宏
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#define MAX_REDUND 2
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#define ENV_CRC_SIZE sizeof(uint32_t)
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#define ENV_HEADER_SIZE ENV_CRC_SIZE
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#define CONFIG_ENV_SIZE 0x10000
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// 环境变量操作选项
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struct env_opts {
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#ifdef CONFIG_FILE
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char *config_file;
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#endif
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char *lockname;
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char *part;
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ulong offset;
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ulong size;
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ulong esize;
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};
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// 环境变量设备配置
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struct env_device {
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char *devname; // /dev/mtdX
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ulong offset; // 偏移
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ulong size; // 环境变量总大小
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ulong erasesize; // 擦除块大小
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int type; // 设备类型（MTD）
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int ubi_volume; // UBI卷标识
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};
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// 环境变量上下文
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struct environment {
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void *image; // 环境变量缓冲区
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uint32_t *crc; // CRC指针（前4字节）
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uint8_t *flags; // 冗余标志
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char *data; // 数据区指针
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ulong usable_envsize; // 数据区有效长度
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int dirty; // 是否需要刷写
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int dev_current; // 当前激活设备
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int flag_scheme; // 标志方案
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};
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// 快捷宏
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#define DEVNAME(idx) envdevices[idx].devname
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#define DEVOFFSET(idx) envdevices[idx].offset
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#define ENVSIZE(idx) envdevices[idx].size
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#define DEVESIZE(idx) envdevices[idx].erasesize
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#define DEVTYPE(idx) envdevices[idx].type
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#define IS_UBI(idx) envdevices[idx].ubi_volume
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#define CUR_DEVNAME DEVNAME(environment.dev_current)
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#define CUR_DEVOFFSET DEVOFFSET(environment.dev_current)
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#define CUR_ENVSIZE ENVSIZE(environment.dev_current)
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#define CUR_DEVESIZE DEVESIZE(environment.dev_current)
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// 全局变量声明
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extern struct env_device envdevices[MAX_REDUND];
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extern struct environment environment;
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extern int have_redund_env;
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// 函数声明
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int fw_printenv(int argc, char *argv[], int value_only, struct env_opts *opts);
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int fw_env_set(int argc, char *argv[], struct env_opts *opts);
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int fw_parse_script(char *fname, struct env_opts *opts);
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int fw_env_open(struct env_opts *opts);
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char *fw_getenv(char *name);
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int fw_env_write(char *name, char *value);
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int fw_env_flush(struct env_opts *opts);
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int fw_env_close(struct env_opts *opts);
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char *fw_env_version(void);
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#endif |