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