733094aead
The RP2040 is new microcontroller from Raspberry Pi that features two Cortex M0s and eight PIO state machines that are good for crunching lots of data. It has 264k RAM and a built in UF2 bootloader too. Datasheet: https://pico.raspberrypi.org/files/rp2040_datasheet.pdf
132 lines
4.6 KiB
C
132 lines
4.6 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: Parameterize flash size based on the configured flash.
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#define TOTAL_FLASH_SIZE 2 * 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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