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https://github.com/trezor/trezor-firmware.git
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76 lines
2.8 KiB
C
76 lines
2.8 KiB
C
/*
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* This file is part of the Trezor project, https://trezor.io/
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*
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* Copyright (c) SatoshiLabs
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef TREZORHAL_FLASH_H
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#define TREZORHAL_FLASH_H
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#include <stdint.h>
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#include <stdlib.h>
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#include "platform.h"
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#include "secbool.h"
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#define FLASH_OTP_NUM_BLOCKS 16
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#define FLASH_OTP_BLOCK_SIZE 32
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/**
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* Flash driver interface is designed to abstract away differences between
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* various MCUs used in Trezor devices.
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*
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* Generally, flash memory is divided into sectors. On different MCUs, sectors
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* may have different sizes, and therefore, different number of sectors are used
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* for a given purpose. For example, on STM32F4, the sectors are relatively
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* large so we use single sector for Storage. On STM32U5, the sectors are
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* smaller, so we use multiple sectors for the Storage. Storage implementation
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* should not care about this, and should use flash_area_t interface to access
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* the flash memory.
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*
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* flash_area_t represents a location in flash memory. It may be contiguous, or
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* it may be composed of multiple non-contiguous subareas.
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*
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* flash_subarea_t represents a contiguous area in flash memory, specified by
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* first_sector and num_sectors.
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*/
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#include "flash_common.h"
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void flash_init(void);
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secbool flash_write_byte(uint16_t sector, uint32_t offset, uint8_t data);
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secbool flash_write_word(uint16_t sector, uint32_t offset, uint32_t data);
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uint32_t flash_wait_and_clear_status_flags(void);
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// Erases the single sector in the designated flash area
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// The 'offset' parameter must indicate the relative sector offset within the
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// flash area If 'offset' is outside the bounds of the flash area,
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// 'bytes_erased' is set to 0 otherwise, 'bytes_erased' is set to the size of
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// the erased sector
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secbool flash_area_erase_partial(const flash_area_t *area, uint32_t offset,
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uint32_t *bytes_erased);
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secbool __wur flash_otp_read(uint8_t block, uint8_t offset, uint8_t *data,
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uint8_t datalen);
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secbool __wur flash_otp_write(uint8_t block, uint8_t offset,
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const uint8_t *data, uint8_t datalen);
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secbool __wur flash_otp_lock(uint8_t block);
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secbool __wur flash_otp_is_locked(uint8_t block);
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#endif // TREZORHAL_FLASH_H
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