GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/rootfs/uboot_env/include/crc32.h

@@ -0,0 +1,9 @@
+#ifndef __CRC32_H__
+#define __CRC32_H__
+
+#include <stdint.h>
+
+// U-Boot标准CRC32计算函数
+uint32_t crc32(uint32_t crc, const unsigned char *buf, unsigned int len);
+
+#endif

source/rootfs/uboot_env/include/fw_env.h

@@ -0,0 +1,83 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+#ifndef __FW_ENV_H__
+#define __FW_ENV_H__
+
+#include <stdint.h>
+#include <stddef.h>
+#include <sys/types.h>  // 引入标准类型头文件
+
+// 基础类型定义
+typedef uint32_t u32;
+typedef uint8_t  u8;
+typedef int32_t  s32;
+typedef unsigned long ulong;  // 关键：显式定义ulong类型
+
+// 环境变量核心宏
+#define MAX_REDUND          2
+#define ENV_CRC_SIZE        sizeof(uint32_t)
+#define ENV_HEADER_SIZE     ENV_CRC_SIZE
+#define CONFIG_ENV_SIZE     0x10000
+
+// 环境变量操作选项
+struct env_opts {
+#ifdef CONFIG_FILE
+    char *config_file;
+#endif
+    char *lockname;
+    char *part;
+    ulong offset;
+    ulong size;
+    ulong esize;
+};
+
+// 环境变量设备配置
+struct env_device {
+    char *devname;      // /dev/mtdX
+    ulong offset;       // 偏移
+    ulong size;         // 环境变量总大小
+    ulong erasesize;    // 擦除块大小
+    int type;           // 设备类型（MTD）
+    int ubi_volume;     // UBI卷标识
+};
+
+// 环境变量上下文
+struct environment {
+    void *image;                // 环境变量缓冲区
+    uint32_t *crc;              // CRC指针（前4字节）
+    uint8_t *flags;             // 冗余标志
+    char *data;                 // 数据区指针
+    ulong usable_envsize;       // 数据区有效长度
+    int dirty;                  // 是否需要刷写
+    int dev_current;            // 当前激活设备
+    int flag_scheme;            // 标志方案
+};
+
+// 快捷宏
+#define DEVNAME(idx)      envdevices[idx].devname
+#define DEVOFFSET(idx)    envdevices[idx].offset
+#define ENVSIZE(idx)      envdevices[idx].size
+#define DEVESIZE(idx)     envdevices[idx].erasesize
+#define DEVTYPE(idx)      envdevices[idx].type
+#define IS_UBI(idx)       envdevices[idx].ubi_volume
+#define CUR_DEVNAME       DEVNAME(environment.dev_current)
+#define CUR_DEVOFFSET     DEVOFFSET(environment.dev_current)
+#define CUR_ENVSIZE       ENVSIZE(environment.dev_current)
+#define CUR_DEVESIZE      DEVESIZE(environment.dev_current)
+
+// 全局变量声明
+extern struct env_device envdevices[MAX_REDUND];
+extern struct environment environment;
+extern int have_redund_env;
+
+// 函数声明
+int fw_printenv(int argc, char *argv[], int value_only, struct env_opts *opts);
+int fw_env_set(int argc, char *argv[], struct env_opts *opts);
+int fw_parse_script(char *fname, struct env_opts *opts);
+int fw_env_open(struct env_opts *opts);
+char *fw_getenv(char *name);
+int fw_env_write(char *name, char *value);
+int fw_env_flush(struct env_opts *opts);
+int fw_env_close(struct env_opts *opts);
+char *fw_env_version(void);
+
+#endif