Aquaris-M10-4G/drivers/misc/mediatek/include/mt-plat/env.h

#ifndef __ENV_H__
#define __ENV_H__
#ifdef CONFIG_MTK_EMMC_SUPPORT
#include <linux/ioctl.h>

#define CFG_ENV_SIZE		0x4000     /*16KB*/
#define CFG_ENV_OFFSET		0x20000    /*128KB*/
#define ENV_PART		"PARA"

struct env_struct {
	char sig_head[8];
	char *env_data;
	char sig_tail[8];
	int checksum;
};

#define ENV_MAGIC		'e'
#define ENV_READ		_IOW(ENV_MAGIC, 1, int)
#define ENV_WRITE		_IOW(ENV_MAGIC, 2, int)

struct env_ioctl {
	char *name;
	int name_len;
	char *value;
	int value_len;
};
extern int set_env(char *name, char *value);
extern char *get_env(const char *name);

#else
#include <linux/errno.h>	/* error codes */
#include <linux/types.h>	/* size_t */
#include <linux/proc_fs.h>  /*proc*/
#include <linux/ioctl.h> /*ioctl*/
#include <linux/module.h>

#define CFG_ENV_SIZE 0x4000 /* (16KB) */
#define CFG_ENV_OFFSET 0x20000  /* (128KB) */

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

#define ENV_PART PART_MISC

#define ENV_SIG "ENV_v1"

#define DATA_FREE_SIZE_TH_DEFAULT (50*1024*1024)

#ifdef CONFIG_MTK_SHARED_SDCARD

#define LIMIT_SDCARD_SIZE

extern long long data_free_size_th;

#endif

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;

#define ENV_MAGIC	 'e'
#define ENV_READ		_IOW(ENV_MAGIC, 1, int)
#define ENV_WRITE		_IOW(ENV_MAGIC, 2, int)

struct env_ioctl {
	char *name;
	int name_len;
	char *value;
	int value_len;
};

extern int set_env(char *name, char *value);
extern char *get_env(char *name);
#endif
#endif