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/*
* Copyright (c) 2019-2020, Arm Limited. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*
*/
#include "sfs_flash_ram.h"
#include <string.h>
/**
* \brief Gets physical address of the given block ID.
*
* \param[in] info Flash device information
* \param[in] block_id Block ID
* \param[in] offset Offset position from the init of the block
*
* \returns Returns physical address for the given block ID.
*/
static uint32_t get_phys_address(const struct sfs_flash_info_t *info,
uint32_t block_id, size_t offset)
{
return (block_id * info->block_size) + offset;
}
psa_status_t sfs_flash_ram_init(const struct sfs_flash_info_t *info)
{
/* Nothing needs to be done in case of flash emulated in RAM */
(void)info;
return PSA_SUCCESS;
}
psa_status_t sfs_flash_ram_read(const struct sfs_flash_info_t *info,
uint32_t block_id, uint8_t *buff, size_t offset,
size_t size)
{
uint32_t idx = get_phys_address(info, block_id, offset);
(void)memcpy(buff, (uint8_t *)info->flash_dev + idx, size);
return PSA_SUCCESS;
}
psa_status_t sfs_flash_ram_write(const struct sfs_flash_info_t *info,
uint32_t block_id, const uint8_t *buff,
size_t offset, size_t size)
{
uint32_t idx = get_phys_address(info, block_id, offset);
(void)memcpy((uint8_t *)info->flash_dev + idx, buff, size);
return PSA_SUCCESS;
}
psa_status_t sfs_flash_ram_flush(const struct sfs_flash_info_t *info)
{
/* Nothing needs to be done for flash emulated in RAM, as writes are
* commited immediately.
*/
(void)info;
return PSA_SUCCESS;
}
psa_status_t sfs_flash_ram_erase(const struct sfs_flash_info_t *info,
uint32_t block_id)
{
uint32_t idx = get_phys_address(info, block_id, 0);
(void)memset((uint8_t *)info->flash_dev + idx, info->erase_val,
info->block_size);
return PSA_SUCCESS;
}
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