129 lines
4.5 KiB
C
129 lines
4.5 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 (c) 2021 Scott Shawcroft for Adafruit Industries
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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 "supervisor/internal_flash.h"
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#include <stdint.h>
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#include <string.h>
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#include <stdbool.h>
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#include "extmod/vfs.h"
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#include "extmod/vfs_fat.h"
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#include "py/mphal.h"
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#include "py/obj.h"
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#include "py/runtime.h"
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#include "lib/oofatfs/ff.h"
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#include "shared-bindings/microcontroller/__init__.h"
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#include "supervisor/usb.h"
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#include "src/rp2040/hardware_structs/include/hardware/structs/sio.h"
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#include "src/rp2_common/hardware_flash/include/hardware/flash.h"
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#include "src/common/pico_binary_info/include/pico/binary_info.h"
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#define RESERVED_FLASH (1 * 1024 * 1024)
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// TODO: Split the caching out of supervisor/shared/external_flash so we can use it.
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#define SECTOR_SIZE 4096
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#define NO_CACHE 0xffffffff
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STATIC uint8_t _cache[SECTOR_SIZE];
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STATIC uint32_t _cache_lba = NO_CACHE;
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void supervisor_flash_init(void) {
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bi_decl_if_func_used(bi_block_device(
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BINARY_INFO_MAKE_TAG('C', 'P'),
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"CircuitPython",
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RESERVED_FLASH,
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TOTAL_FLASH_SIZE - RESERVED_FLASH,
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NULL,
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BINARY_INFO_BLOCK_DEV_FLAG_READ |
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BINARY_INFO_BLOCK_DEV_FLAG_WRITE |
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BINARY_INFO_BLOCK_DEV_FLAG_PT_UNKNOWN));
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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 (TOTAL_FLASH_SIZE - RESERVED_FLASH) / FILESYSTEM_BLOCK_SIZE;
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}
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void port_internal_flash_flush(void) {
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if (_cache_lba == NO_CACHE) {
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return;
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}
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common_hal_mcu_disable_interrupts();
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flash_range_erase(RESERVED_FLASH + _cache_lba, SECTOR_SIZE);
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flash_range_program(RESERVED_FLASH + _cache_lba, _cache, SECTOR_SIZE);
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common_hal_mcu_enable_interrupts();
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_cache_lba = NO_CACHE;
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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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memcpy(dest,
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(void*)(XIP_BASE + RESERVED_FLASH + block * FILESYSTEM_BLOCK_SIZE),
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num_blocks * FILESYSTEM_BLOCK_SIZE);
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return 0;
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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 blocks_per_sector = SECTOR_SIZE / FILESYSTEM_BLOCK_SIZE;
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uint32_t block = 0;
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while (block < num_blocks) {
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uint32_t block_address = lba + block;
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uint32_t sector_offset = block_address / blocks_per_sector * SECTOR_SIZE;
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uint8_t block_offset = block_address % blocks_per_sector;
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if (_cache_lba != block_address) {
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memcpy(_cache,
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(void*)(XIP_BASE + RESERVED_FLASH + sector_offset),
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SECTOR_SIZE);
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_cache_lba = sector_offset;
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}
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for (uint8_t b = block_offset; b < blocks_per_sector; b++) {
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// Stop copying after the last block.
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if (block >= num_blocks) {
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break;
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}
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memcpy(_cache + b * FILESYSTEM_BLOCK_SIZE,
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src + block * FILESYSTEM_BLOCK_SIZE,
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FILESYSTEM_BLOCK_SIZE);
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block++;
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}
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// Make sure we don't have an interrupt while we do flash operations.
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common_hal_mcu_disable_interrupts();
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flash_range_erase(RESERVED_FLASH + sector_offset, SECTOR_SIZE);
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flash_range_program(RESERVED_FLASH + sector_offset, _cache, SECTOR_SIZE);
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common_hal_mcu_enable_interrupts();
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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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