levelx
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Outline
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#define LX_SOURCE_CODE
#define LX_DISABLE_ERROR_CHECKING
#include "lx_api.h"
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_lx_nor_flash_extended_cache_enable(LX_NOR_FLASH *, void *, ULONG)
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SourceVuSTM32 Libraries and Sampleslevelxcommon/src/lx_nor_flash_extended_cache_enable.c
 
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/**************************************************************************/ /* */ /* Copyright (c) Microsoft Corporation. All rights reserved. */ /* */ /* This software is licensed under the Microsoft Software License */ /* Terms for Microsoft Azure RTOS. Full text of the license can be */ /* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */ /* and in the root directory of this software. */ /* */... /**************************************************************************/ ... /**************************************************************************/ /**************************************************************************/ /** */ /** LevelX Component */ /** */ /** NOR Flash */ /** */... /**************************************************************************/ /**************************************************************************/ #define LX_SOURCE_CODE /* Disable ThreadX error checking. */ #ifndef LX_DISABLE_ERROR_CHECKING #define LX_DISABLE_ERROR_CHECKING #endif /* Include necessary system files. */ #include "lx_api.h" ... /**************************************************************************/ /* */ /* FUNCTION RELEASE */ /* */ /* _lx_nor_flash_extended_cache_enable PORTABLE C */ /* 6.1.9 */ /* AUTHOR */ /* */ /* William E. Lamie, Microsoft Corporation */ /* */ /* DESCRIPTION */ /* */ /* This function enables or disables the extended cache. */ /* */ /* INPUT */ /* */ /* nor_flash NOR flash instance */ /* memory Address of RAM for cache */ /* size Size of the RAM for cache */ /* */ /* OUTPUT */ /* */ /* return status */ /* */ /* CALLS */ /* */ /* None */ /* */ /* CALLED BY */ /* */ /* Application Code */ /* */ /* RELEASE HISTORY */ /* */ /* DATE NAME DESCRIPTION */ /* */ /* 05-19-2020 William E. Lamie Initial Version 6.0 */ /* 09-30-2020 William E. Lamie Modified comment(s), */ /* resulting in version 6.1 */ /* 12-31-2020 William E. Lamie Modified comment(s), */ /* fixed compiler warnings, */ /* resulting in version 6.1.3 */ /* 06-02-2021 Bhupendra Naphade Modified comment(s), and */ /* updated product constants */ /* resulting in version 6.1.7 */ /* 10-15-2021 Bhupendra Naphade Modified comment(s), and */ /* added check for out of */ /* bound memory access, */ /* resulting in version 6.1.9 */ /* */... /**************************************************************************/ UINT _lx_nor_flash_extended_cache_enable(LX_NOR_FLASH *nor_flash, VOID *memory, ULONG size) { #ifndef LX_NOR_DISABLE_EXTENDED_CACHE UINT i; ULONG cache_size; ULONG *cache_memory; /* Determine if memory was specified but with an invalid size (less than one NOR sector). */ if ((memory) && (size < LX_NOR_SECTOR_SIZE)) { /* Error in memory size supplied. */ return(LX_ERROR); }if ((memory) && (size < LX_NOR_SECTOR_SIZE)) { ... } #ifdef LX_THREAD_SAFE_ENABLE /* Obtain the thread safe mutex. */ tx_mutex_get(&nor_flash -> lx_nor_flash_mutex, TX_WAIT_FOREVER);/* ... */ #endif /* Initialize the internal NOR cache. */ nor_flash -> lx_nor_flash_extended_cache_entries = 0; /* Calculate cache size in words. */ cache_size = size/sizeof(ULONG); /* Setup cache memory pointer. */ cache_memory = (ULONG *) memory; /* Loop through the memory supplied and assign to cache entries. */ i = 0; while (cache_size >= LX_NOR_SECTOR_SIZE) { /* Setup this cache entry. */ nor_flash -> lx_nor_flash_extended_cache[i].lx_nor_flash_extended_cache_entry_sector_address = LX_NULL; nor_flash -> lx_nor_flash_extended_cache[i].lx_nor_flash_extended_cache_entry_sector_memory = cache_memory; nor_flash -> lx_nor_flash_extended_cache[i].lx_nor_flash_extended_cache_entry_access_count = 0; /* Move the cache memory forward. */ cache_memory = cache_memory + LX_NOR_SECTOR_SIZE; /* Decrement the size. */ cache_size = cache_size - LX_NOR_SECTOR_SIZE; /* Move to next cache entry. */ i++; }while (cache_size >= LX_NOR_SECTOR_SIZE) { ... } /* Save the number of cache entries. */ if(i > LX_NOR_EXTENDED_CACHE_SIZE) { nor_flash -> lx_nor_flash_extended_cache_entries = LX_NOR_EXTENDED_CACHE_SIZE; }if (i > LX_NOR_EXTENDED_CACHE_SIZE) { ... } else { nor_flash -> lx_nor_flash_extended_cache_entries = i; }else { ... } #ifdef LX_THREAD_SAFE_ENABLE /* Release the thread safe mutex. */ tx_mutex_put(&nor_flash -> lx_nor_flash_mutex);/* ... */ #endif /* Return successful completion. */ return(LX_SUCCESS);/* ... */ #else LX_PARAMETER_NOT_USED(nor_flash); LX_PARAMETER_NOT_USED(memory); LX_PARAMETER_NOT_USED(size); /* Return disabled error message. */ return(LX_DISABLED);/* ... */ #endif }{ ... } ...
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