circuitpython/ports/cxd56/supervisor/internal_flash.c

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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright 2019 Sony Semiconductor Solutions Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <string.h>
#include "supervisor/flash.h"
/* Prototypes for Remote API */
int fw_fm_rawwrite(uint32_t offset, const void *buf, uint32_t size);
int fw_fm_rawverifywrite(uint32_t offset, const void *buf, uint32_t size);
int fw_fm_rawread(uint32_t offset, void *buf, uint32_t size);
int fw_fm_rawerasesector(uint32_t sector);
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#define CXD56_SPIFLASHSIZE (16 * 1024 * 1024)
#define SECTOR_SHIFT 12
#define SECTOR_SIZE (1 << SECTOR_SHIFT)
#define PAGE_SHIFT 9
#define PAGE_SIZE (1 << PAGE_SHIFT)
#define NO_SECTOR 0xffffffff
uint8_t flash_cache[SECTOR_SIZE];
uint32_t flash_sector = NO_SECTOR;
void supervisor_flash_init(void) {
}
uint32_t supervisor_flash_get_block_size(void) {
return FILESYSTEM_BLOCK_SIZE;
}
uint32_t supervisor_flash_get_block_count(void) {
return CXD56_SPIFLASHSIZE >> PAGE_SHIFT;
}
void port_internal_flash_flush(void) {
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if (flash_sector == NO_SECTOR) {
return;
}
fw_fm_rawerasesector(flash_sector);
fw_fm_rawwrite(flash_sector << SECTOR_SHIFT, flash_cache, SECTOR_SIZE);
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flash_sector = NO_SECTOR;
}
mp_uint_t supervisor_flash_read_blocks(uint8_t *dest, uint32_t block, uint32_t num_blocks) {
supervisor_flash_flush();
if (fw_fm_rawread(block << PAGE_SHIFT, dest, num_blocks << PAGE_SHIFT) < 0) {
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return 1;
}
return 0; // success
}
mp_uint_t supervisor_flash_write_blocks(const uint8_t *src, uint32_t lba, uint32_t num_blocks) {
uint32_t sector;
uint32_t block_position;
uint32_t current_block = 0;
while (num_blocks--) {
sector = (lba << PAGE_SHIFT) >> SECTOR_SHIFT;
block_position = lba - 8 * sector;
if (sector != flash_sector) {
supervisor_flash_flush();
if (fw_fm_rawread(sector << SECTOR_SHIFT, flash_cache, SECTOR_SIZE) < 0) {
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return 1;
}
if (memcmp(&flash_cache[block_position << PAGE_SHIFT], &src[current_block << PAGE_SHIFT], PAGE_SIZE) != 0) {
flash_sector = sector;
}
}
memcpy(&flash_cache[block_position << PAGE_SHIFT], &src[current_block << PAGE_SHIFT], PAGE_SIZE);
lba++;
current_block++;
}
return 0; // success
}
void supervisor_flash_release_cache(void) {
}