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2020-05-11 08:49:43 -06:00
commit 6f4ea0561f
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common/src/lx_nor_flash_driver_block_erase.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 TX_DISABLE_ERROR_CHECKING
#define TX_DISABLE_ERROR_CHECKING
#endif
/* Include necessary system files. */
#include "lx_api.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _lx_nor_flash_driver_block_erase PORTABLE C */
/* 6.0 */
/* AUTHOR */
/* */
/* William E. Lamie, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function performs a NOR flash block erase. */
/* */
/* INPUT */
/* */
/* nor_flash NOR flash instance */
/* block Block number to erase */
/* erase_count Erase count for this block */
/* */
/* OUTPUT */
/* */
/* return status */
/* */
/* CALLS */
/* */
/* (lx_nor_flash_driver_block_erase) Actual driver block erase */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 William E. Lamie Initial Version 6.0 */
/* */
/**************************************************************************/
UINT _lx_nor_flash_driver_block_erase(LX_NOR_FLASH *nor_flash, ULONG block, ULONG erase_count)
{
UINT status;
#ifndef LX_NOR_DISABLE_EXTENDED_CACHE
UINT i;
ULONG *block_start_address;
ULONG *block_end_address;
ULONG *cache_entry_start;
ULONG *cache_entry_end;
/* Calculate the block starting address. */
block_start_address = nor_flash -> lx_nor_flash_base_address + (block * nor_flash -> lx_nor_flash_words_per_block);
block_end_address = block_start_address + nor_flash -> lx_nor_flash_words_per_block;
/* Loop through the cache entries to see if there is a sector in cache. */
for (i = 0; i < nor_flash -> lx_nor_flash_extended_cache_entries; i++)
{
/* Search through the cache to see if this cache entry needs to be invalidated. */
/* Determine the cache entry addresses. */
cache_entry_start = nor_flash -> lx_nor_flash_extended_cache[i].lx_nor_flash_extended_cache_entry_sector_address;
cache_entry_end = cache_entry_start + LX_NOR_SECTOR_SIZE;
/* Determine if the flash address in in the cache entry. */
if ((cache_entry_start) && (block_start_address <= cache_entry_start) && (block_end_address > cache_entry_end))
{
/* Yes, this cache entry is in the block to be erased so invalidate it. */
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_access_count = 0;
}
}
#endif
/* Call the actual driver block erase function. */
status = (nor_flash -> lx_nor_flash_driver_block_erase)(block, erase_count);
/* Return completion status. */
return(status);
}