122 lines
4.7 KiB
C
122 lines
4.7 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) 2020 microDev
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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 "common-hal/nvm/ByteArray.h"
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#include "shared-bindings/nvm/ByteArray.h"
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#include <string.h>
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#include "py/runtime.h"
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#include "src/rp2_common/hardware_flash/include/hardware/flash.h"
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#include "shared-bindings/microcontroller/__init__.h"
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extern uint32_t __flash_binary_start;
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static const uint32_t flash_binary_start = (uint32_t)&__flash_binary_start;
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#define RMV_OFFSET(addr) addr - flash_binary_start
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uint32_t common_hal_nvm_bytearray_get_length(const nvm_bytearray_obj_t *self) {
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return self->len;
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}
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static void write_page(uint32_t page_addr, uint32_t offset, uint32_t len, uint8_t *bytes) {
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// Write a whole page to flash, buffering it first and then erasing and rewriting it
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// since we can only write a whole page at a time.
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if (offset == 0 && len == FLASH_PAGE_SIZE) {
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// disable interrupts to prevent core hang on rp2040
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common_hal_mcu_disable_interrupts();
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flash_range_program(RMV_OFFSET(page_addr), bytes, FLASH_PAGE_SIZE);
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common_hal_mcu_enable_interrupts();
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} else {
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uint8_t buffer[FLASH_PAGE_SIZE];
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memcpy(buffer, (uint8_t *)page_addr, FLASH_PAGE_SIZE);
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memcpy(buffer + offset, bytes, len);
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common_hal_mcu_disable_interrupts();
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flash_range_program(RMV_OFFSET(page_addr), buffer, FLASH_PAGE_SIZE);
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common_hal_mcu_enable_interrupts();
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}
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}
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static void erase_and_write_sector(uint32_t address, uint32_t len, uint8_t *bytes) {
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// Write a whole sector to flash, buffering it first and then erasing and rewriting it
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// since we can only erase a whole sector at a time.
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uint8_t buffer[FLASH_SECTOR_SIZE];
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#pragma GCC diagnostic push
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#if __GNUC__ >= 11
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// TODO: Update this to a better workaround for GCC 11 when one is provided.
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// See: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99578#c20
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#pragma GCC diagnostic ignored "-Warray-bounds"
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#pragma GCC diagnostic ignored "-Wstringop-overread"
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#endif
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memcpy(buffer, (uint8_t *)CIRCUITPY_INTERNAL_NVM_START_ADDR, FLASH_SECTOR_SIZE);
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#pragma GCC diagnostic pop
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memcpy(buffer + address, bytes, len);
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// disable interrupts to prevent core hang on rp2040
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common_hal_mcu_disable_interrupts();
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flash_range_erase(RMV_OFFSET(CIRCUITPY_INTERNAL_NVM_START_ADDR), FLASH_SECTOR_SIZE);
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flash_range_program(RMV_OFFSET(CIRCUITPY_INTERNAL_NVM_START_ADDR), buffer, FLASH_SECTOR_SIZE);
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common_hal_mcu_enable_interrupts();
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}
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void common_hal_nvm_bytearray_get_bytes(const nvm_bytearray_obj_t *self,
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uint32_t start_index, uint32_t len, uint8_t *values) {
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memcpy(values, self->start_address + start_index, len);
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}
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bool common_hal_nvm_bytearray_set_bytes(const nvm_bytearray_obj_t *self,
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uint32_t start_index, uint8_t *values, uint32_t len) {
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uint8_t values_in[len];
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common_hal_nvm_bytearray_get_bytes(self, start_index, len, values_in);
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bool all_ones = true;
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for (uint32_t i = 0; i < len; i++) {
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if (values_in[i] != UINT8_MAX) {
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all_ones = false;
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break;
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}
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}
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if (all_ones) {
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uint32_t address = (uint32_t)self->start_address + start_index;
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uint32_t offset = address % FLASH_PAGE_SIZE;
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uint32_t page_addr = address - offset;
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while (len) {
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uint32_t write_len = MIN(len, FLASH_PAGE_SIZE - offset);
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write_page(page_addr, offset, write_len, values);
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len -= write_len;
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values += write_len;
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page_addr += FLASH_PAGE_SIZE;
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offset = 0;
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}
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} else {
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erase_and_write_sector(start_index, len, values);
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}
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return true;
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}
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