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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_write 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 write of the NOR flash memory. */ |
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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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/* flash_address Address of NOR flash to write */ |
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/* source Source for the write */ |
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/* words Number of words to write */ |
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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_write) Actual driver write */ |
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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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113510 |
UINT _lx_nor_flash_driver_write(LX_NOR_FLASH *nor_flash, ULONG *flash_address, ULONG *source, ULONG words) |
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{ |
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#ifndef LX_NOR_DISABLE_EXTENDED_CACHE |
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UINT status; |
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UINT i; |
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ULONG *cache_entry_start; |
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ULONG *cache_entry_end; |
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ULONG cache_offset; |
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/* Is the request a whole sector or a partial sector. */ |
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✓✓✓✓
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113510 |
if ((words == 1) && (nor_flash -> lx_nor_flash_extended_cache_entries)) |
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{ |
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/* One word request, which implies that it is a NOR flash metadata write. */ |
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/* Loop through the cache entries to see if there is a sector in cache. */ |
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✓✓ |
147691 |
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 there is a cache entry. */ |
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/* Determine the cache entry addresses. */ |
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136439 |
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) && (flash_address >= cache_entry_start) && (flash_address < cache_entry_end)) |
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{ |
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/* Yes, we found the entry. */ |
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/* Calculate the offset into the cache entry. */ |
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36678 |
cache_offset = (ULONG)(flash_address - cache_entry_start); |
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/* Copy the word into the cache. */ |
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36678 |
*(nor_flash -> lx_nor_flash_extended_cache[i].lx_nor_flash_extended_cache_entry_sector_memory + cache_offset) = *source; |
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/* Get out of the loop. */ |
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36678 |
break; |
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} |
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} |
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} |
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/* In any case, call the actual driver write 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_write)(nor_flash, flash_address, source, words); |
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#else |
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status = (nor_flash -> lx_nor_flash_driver_write)(flash_address, source, words); |
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#endif |
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/* Return completion status. */ |
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113510 |
return(status); |
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#else |
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UINT status; |
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/* Call the actual driver write 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_write)(nor_flash, flash_address, source, words); |
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#else |
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status = (nor_flash -> lx_nor_flash_driver_write)(flash_address, source, words); |
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#endif |
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/* Return completion status. */ |
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return(status); |
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#endif |
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} |
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