mtk-lk/platform/common/include/env.h

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*
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#ifndef __ENV_H__
#define __ENV_H__

#define CFG_ENV_SIZE 0x4000 //(16KB)
#define CFG_ENV_RW_OFFSET   0x20000
#define CFG_ENV_RO_OFFSET   0x24000

#define CFG_ENV_DATA_SIZE (CFG_ENV_SIZE-sizeof(g_env[area].checksum)-sizeof(g_env[area].sig)-sizeof(g_env[area].sig_1))
#define CFG_ENV_DATA_OFFSET (sizeof(g_env[area].sig))
#define CFG_ENV_SIG_1_OFFSET (CFG_ENV_SIZE - sizeof(g_env[area].checksum)-sizeof(g_env[area].sig_1))
#define CFG_ENV_CHECKSUM_OFFSET (CFG_ENV_SIZE - sizeof(g_env[area].checksum))

#if defined(MTK_EMMC_SUPPORT) || defined(MTK_UFS_SUPPORT)
#define ENV_PART "para"
#else
#define ENV_PART PART_MISC
#endif

#define ENV_SIG "ENV_v1"

typedef struct env_struct {
	char sig[8]; // "ENV_v1"
	char *env_data;
	char sig_1[8];  //"ENV_v1"
	int checksum; // checksum for env_data
} env_t;

enum {
	SYSENV_RW_AREA = 0,
	SYSENV_RO_AREA,
	SYSENV_AREA_MAX,
};

extern void env_init(void);
extern char *get_env(char *name);
extern char *get_ro_env(char *name);
extern int set_env(char *name,char *value);
extern void print_env(void);
#endif