blob: ea2643569a01828b1eb9352585c81b849e6380ef [file] [log] [blame]
* Copyright (c) 2017-2020 Nordic Semiconductor ASA
* Copyright (c) 2015 Runtime Inc
* SPDX-License-Identifier: Apache-2.0
#ifndef __FCB_PRIV_H_
#define __FCB_PRIV_H_
#ifdef __cplusplus
extern "C" {
#define FCB_CRC_SZ sizeof(uint8_t)
#define FCB_TMP_BUF_SZ 32
#define FCB_ID_GT(a, b) (((int16_t)(a) - (int16_t)(b)) > 0)
#define MK32(val) ((((uint32_t)(val)) << 24) | \
(((uint32_t)((val) & 0xff)) << 16) | \
(((uint32_t)((val) & 0xff)) << 8) | \
(((uint32_t)((val) & 0xff))))
/* @brief Gets magic value in flash formatted version
* Magic, the fcb->f_magic, prior to being written to flash, is xored with
* binary inversion of fcb->f_erase_value to avoid it matching a 4 consecutive
* bytes of flash erase value, which is used to recognize end of records,
* by accident. Only the value of 0xFFFFFFFF will be always written as
* 4 bytes of erase value.
* @param fcb pointer to initialized fcb structure
* @return uin32_t formatted magic value
static inline uint32_t fcb_flash_magic(const struct fcb *fcb)
const uint8_t ev = fcb->f_erase_value;
return (fcb->f_magic ^ ~MK32(ev));
struct fcb_disk_area {
uint32_t fd_magic;
uint8_t fd_ver;
uint8_t _pad;
uint16_t fd_id;
int fcb_put_len(const struct fcb *fcb, uint8_t *buf, uint16_t len);
int fcb_get_len(const struct fcb *fcb, uint8_t *buf, uint16_t *len);
static inline int fcb_len_in_flash(struct fcb *fcb, uint16_t len)
if (fcb->f_align <= 1U) {
return len;
return (len + (fcb->f_align - 1U)) & ~(fcb->f_align - 1U);
const struct flash_area *fcb_open_flash(const struct fcb *fcb);
uint8_t fcb_get_align(const struct fcb *fcb);
int fcb_erase_sector(const struct fcb *fcb, const struct flash_sector *sector);
int fcb_getnext_in_sector(struct fcb *fcb, struct fcb_entry *loc);
struct flash_sector *fcb_getnext_sector(struct fcb *fcb,
struct flash_sector *sector);
int fcb_getnext_nolock(struct fcb *fcb, struct fcb_entry *loc);
int fcb_elem_info(struct fcb *fcb, struct fcb_entry *loc);
int fcb_elem_crc8(struct fcb *fcb, struct fcb_entry *loc, uint8_t *crc8p);
int fcb_sector_hdr_init(struct fcb *fcb, struct flash_sector *sector, uint16_t id);
int fcb_sector_hdr_read(struct fcb *fcb, struct flash_sector *sector,
struct fcb_disk_area *fdap);
#ifdef __cplusplus
#endif /* __FCB_PRIV_H_ */