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https://github.com/eclipse-threadx/levelx.git
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124 lines
6.4 KiB
C
124 lines
6.4 KiB
C
/**************************************************************************/
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/* */
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/* Copyright (c) Microsoft Corporation. All rights reserved. */
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/* */
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/* This software is licensed under the Microsoft Software License */
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/* Terms for Microsoft Azure RTOS. Full text of the license can be */
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/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
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/* and in the root directory of this software. */
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/* */
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/**************************************************************************/
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/**************************************************************************/
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/**************************************************************************/
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/** */
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/** LevelX Component */
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/** */
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/** NOR Flash */
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/** */
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/**************************************************************************/
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/**************************************************************************/
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#define LX_SOURCE_CODE
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/* Disable ThreadX error checking. */
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#ifndef TX_DISABLE_ERROR_CHECKING
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#define TX_DISABLE_ERROR_CHECKING
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#endif
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/* Include necessary system files. */
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#include "lx_api.h"
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/**************************************************************************/
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/* */
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/* FUNCTION RELEASE */
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/* */
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/* _lx_nor_flash_driver_block_erase PORTABLE C */
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/* 6.0 */
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/* AUTHOR */
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/* */
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/* William E. Lamie, Microsoft Corporation */
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/* */
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/* DESCRIPTION */
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/* */
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/* This function performs a NOR flash block erase. */
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/* */
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/* INPUT */
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/* */
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/* nor_flash NOR flash instance */
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/* block Block number to erase */
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/* erase_count Erase count for this block */
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/* */
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/* OUTPUT */
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/* */
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/* return status */
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/* */
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/* CALLS */
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/* */
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/* (lx_nor_flash_driver_block_erase) Actual driver block erase */
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/* */
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/* CALLED BY */
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/* */
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/* Application Code */
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/* */
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/* RELEASE HISTORY */
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/* */
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/* DATE NAME DESCRIPTION */
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/* */
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/* 05-19-2020 William E. Lamie Initial Version 6.0 */
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/* */
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/**************************************************************************/
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UINT _lx_nor_flash_driver_block_erase(LX_NOR_FLASH *nor_flash, ULONG block, ULONG erase_count)
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{
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UINT status;
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#ifndef LX_NOR_DISABLE_EXTENDED_CACHE
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UINT i;
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ULONG *block_start_address;
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ULONG *block_end_address;
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ULONG *cache_entry_start;
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ULONG *cache_entry_end;
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/* Calculate the block starting address. */
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block_start_address = nor_flash -> lx_nor_flash_base_address + (block * nor_flash -> lx_nor_flash_words_per_block);
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block_end_address = block_start_address + nor_flash -> lx_nor_flash_words_per_block;
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/* Loop through the cache entries to see if there is a sector in cache. */
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for (i = 0; i < nor_flash -> lx_nor_flash_extended_cache_entries; i++)
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{
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/* Search through the cache to see if this cache entry needs to be invalidated. */
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/* Determine the cache entry addresses. */
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cache_entry_start = nor_flash -> lx_nor_flash_extended_cache[i].lx_nor_flash_extended_cache_entry_sector_address;
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cache_entry_end = cache_entry_start + LX_NOR_SECTOR_SIZE;
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/* Determine if the flash address in in the cache entry. */
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if ((cache_entry_start) && (block_start_address <= cache_entry_start) && (block_end_address > cache_entry_end))
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{
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/* Yes, this cache entry is in the block to be erased so invalidate it. */
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nor_flash -> lx_nor_flash_extended_cache[i].lx_nor_flash_extended_cache_entry_sector_address = LX_NULL;
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nor_flash -> lx_nor_flash_extended_cache[i].lx_nor_flash_extended_cache_entry_access_count = 0;
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}
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}
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#endif
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/* Call the actual driver block erase function. */
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status = (nor_flash -> lx_nor_flash_driver_block_erase)(block, erase_count);
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/* Return completion status. */
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return(status);
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}
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