mirror of
https://github.com/eclipse-threadx/levelx.git
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Frédéric DesbiensandCodex
309d2bd91b
Invalidate extended cache entries that end exactly at the erased block boundary and cover the last-sector case in the zero-base regression test. Co-authored-by: Codex <codex@openai.com>
132 lines
6.4 KiB
C
132 lines
6.4 KiB
C
/***************************************************************************
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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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// Some portions generated by Codex (GPT-5).
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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_start_value;
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ULONG cache_entry_end_value;
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/* Calculate the block starting address.
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MISRA C:2012 Rule 11.4 deviation: NOR driver addresses may be logical
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address tokens, including zero, so compare address values without
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dereferencing them. */
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block_start_address = (ULONG)(nor_flash -> lx_nor_flash_base_address) + (block * nor_flash -> lx_nor_flash_words_per_block * sizeof(ULONG));
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block_end_address = block_start_address + (nor_flash -> lx_nor_flash_words_per_block * sizeof(ULONG));
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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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/* Determine if the cache entry is in the block being erased. */
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if (nor_flash -> lx_nor_flash_extended_cache[i].lx_nor_flash_extended_cache_entry_valid)
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{
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cache_entry_start_value = (ULONG)cache_entry_start;
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cache_entry_end_value = cache_entry_start_value + (LX_NOR_SECTOR_SIZE * sizeof(ULONG));
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if ((block_start_address <= cache_entry_start_value) && (block_end_address >= cache_entry_end_value))
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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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nor_flash -> lx_nor_flash_extended_cache[i].lx_nor_flash_extended_cache_entry_valid = LX_FALSE;
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}
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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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