src/bsp/lk/lib/aee/include/env.h

/*
 * Copyright (c) 2018 MediaTek Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files
 * (the "Software"), to deal in the Software without restriction,
 * including without limitation the rights to use, copy, modify, merge,
 * publish, distribute, sublicense, and/or sell copies of the Software,
 * and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#ifndef __ENV_H__
#define __ENV_H__

#ifdef MTK_COMBO_NAND_SUPPORT
extern unsigned int mtk_nand_erasesize(void);
#define CFG_ENV_SIZE    0x8000 //(32KB)
#define CFG_ENV_OFFSET  mtk_nand_erasesize()
#else
#define CFG_ENV_SIZE 0x4000 //(16KB)
#define CFG_ENV_OFFSET 0x20000 //(128KB)
#endif

#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_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;

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