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147 lines
4.5 KiB
C
147 lines
4.5 KiB
C
/****************************************************************************
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*
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* Copyright (c) 2015 PX4 Development Team. All rights reserved.
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* Author: Ben Dyer <ben_dyer@mac.com>
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* Pavel Kirienko <pavel.kirienko@zubax.com>
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* David Sidrane <david_s5@nscdg.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name PX4 nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#include <nuttx/config.h>
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#include "boot_config.h"
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#include <stdint.h>
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#include <stdlib.h>
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#include <nuttx/progmem.h>
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#include "chip.h"
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#include "stm32.h"
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#include "flash.h"
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#include "blsched.h"
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/****************************************************************************
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* Name: bl_flash_erase
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*
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* Description:
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* This function erases the flash starting at address and ending at
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* address + nbytes.
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*
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* Input Parameters:
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* address - A word-aligned address within the first page of flash to erase
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* nbytes - The number of bytes to erase, rounding up to the next page.
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*
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*
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*
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* Returned value:
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* On success FLASH_OK On Error one of the flash_error_t
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*
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****************************************************************************/
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flash_error_t bl_flash_erase(size_t address, size_t nbytes)
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{
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/*
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* FIXME (?): this may take a long time, and while flash is being erased it
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* might not be possible to execute interrupts, send NodeStatus messages etc.
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* We can pass a per page callback or yeild */
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flash_error_t status = FLASH_ERROR_AFU;
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ssize_t bllastpage = up_progmem_getpage(address - 1);
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if (bllastpage < 0) {
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return FLASH_ERROR_AFU;
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}
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ssize_t appstartpage = up_progmem_getpage(address);
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ssize_t appendpage = up_progmem_getpage(address + nbytes - 4);
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if (appendpage < 0 || appstartpage < 0) {
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return FLASH_ERROR_AFU;
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}
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status = FLASH_ERROR_SUICIDE;
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if (bllastpage >= 0 && appstartpage > bllastpage) {
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/* Erase the whole application flash region */
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status = FLASH_OK;
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while (status == FLASH_OK && appstartpage <= appendpage) {
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bl_sched_yield();
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ssize_t ps = up_progmem_eraseblock(appstartpage++);
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if (ps <= 0) {
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status = FLASH_ERASE_ERROR;
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}
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}
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}
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return status;
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}
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/****************************************************************************
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* Name: bl_flash_write
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*
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* Description:
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* This function writes the flash starting at the given address
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*
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* Input Parameters:
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* flash_address - The address of the flash to write
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* must be word aligned
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* data - A pointer to a buffer count bytes to be written
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* to the flash.
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* count - Number of bytes to write
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*
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* Returned value:
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* On success FLASH_OK On Error one of the flash_error_t
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*
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****************************************************************************/
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flash_error_t bl_flash_write(uint32_t flash_address, uint8_t *data, ssize_t count)
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{
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flash_error_t status = FLASH_ERROR;
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if (flash_address >= APPLICATION_LOAD_ADDRESS &&
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(flash_address + count) <= (uint32_t) APPLICATION_LAST_8BIT_ADDRRESS) {
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if (count ==
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up_progmem_write((size_t) flash_address, (void *)data, count)) {
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status = FLASH_OK;
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}
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}
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return status;
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}
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