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/* NVS: non volatile storage in flash
*
* Copyright (c) 2018 Laczen
*
* SPDX-License-Identifier: Apache-2.0
*/
#ifndef __NVS_PRIV_H_
#define __NVS_PRIV_H_
#ifdef __cplusplus
extern "C" {
#endif
/*
* MASKS AND SHIFT FOR ADDRESSES
* an address in nvs is an uint32_t where:
* high 2 bytes represent the sector number
* low 2 bytes represent the offset in a sector
*/
#define ADDR_SECT_MASK 0xFFFF0000
#define ADDR_SECT_SHIFT 16
#define ADDR_OFFS_MASK 0x0000FFFF
/*
* Status return values
*/
#define NVS_STATUS_NOSPACE 1
#define NVS_BLOCK_SIZE 32
/* Allocation Table Entry */
struct nvs_ate {
uint16_t id; /* data id */
uint16_t offset; /* data offset within sector */
uint16_t len; /* data len within sector */
uint8_t part; /* part of a multipart data - future extension */
uint8_t crc8; /* crc8 check of the entry */
} __packed;
BUILD_ASSERT(offsetof(struct nvs_ate, crc8) ==
sizeof(struct nvs_ate) - sizeof(uint8_t),
"crc8 must be the last member");
#ifdef __cplusplus
}
#endif
#endif /* __NVS_PRIV_H_ */