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https://github.com/zephyrproject-rtos/zephyr
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2eeff9aab0
The Atmel SAM E70 flash has a 16-byte write block size. Increase the NVS_BLOCK_SIZE a bit and take some margin. This might also improve the performances by reducing the calls to the flash driver when moving data during garbage collection. Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
49 lines
1.0 KiB
C
49 lines
1.0 KiB
C
/* NVS: non volatile storage in flash
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*
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* Copyright (c) 2018 Laczen
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef __NVS_PRIV_H_
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#define __NVS_PRIV_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* MASKS AND SHIFT FOR ADDRESSES
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* an address in nvs is an u32_t where:
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* high 2 bytes represent the sector number
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* low 2 bytes represent the offset in a sector
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*/
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#define ADDR_SECT_MASK 0xFFFF0000
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#define ADDR_SECT_SHIFT 16
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#define ADDR_OFFS_MASK 0x0000FFFF
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/*
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* Status return values
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*/
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#define NVS_STATUS_NOSPACE 1
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#define NVS_BLOCK_SIZE 32
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/* Allocation Table Entry */
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struct nvs_ate {
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u16_t id; /* data id */
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u16_t offset; /* data offset within sector */
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u16_t len; /* data len within sector */
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u8_t part; /* part of a multipart data - future extension */
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u8_t crc8; /* crc8 check of the entry */
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} __packed;
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BUILD_ASSERT_MSG(offsetof(struct nvs_ate, crc8) ==
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sizeof(struct nvs_ate) - sizeof(u8_t),
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"crc8 must be the last member");
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#ifdef __cplusplus
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}
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#endif
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#endif /* __NVS_PRIV_H_ */
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