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/*************************************************************************** |
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* Copyright (c) 2024 Microsoft Corporation |
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* Copyright (c) 2026-present Eclipse ThreadX contributors |
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* |
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* This program and the accompanying materials are made available under the |
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* terms of the MIT License which is available at |
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* https://opensource.org/licenses/MIT. |
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* |
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* SPDX-License-Identifier: MIT |
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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 LX_DISABLE_ERROR_CHECKING |
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#define LX_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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/* 6.2.1 */ |
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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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/**************************************************************************/ |
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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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✓✓ |
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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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✓✗✓✓
✓✓ |
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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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#ifdef LX_NOR_ENABLE_CONTROL_BLOCK_FOR_DRIVER_INTERFACE |
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status = (nor_flash -> lx_nor_flash_driver_block_erase)(nor_flash, block, erase_count); |
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#else |
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status = (nor_flash -> lx_nor_flash_driver_block_erase)(block, erase_count); |
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#endif |
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/* Return completion status. */ |
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return(status); |
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} |
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