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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_sector_mapping_cache_invalidate PORTABLE C */
/* 6.1.7 */
/* AUTHOR */
/* */
/* William E. Lamie, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function invalidates the sector's entry in the NOR flash */
/* cache. */
/* */
/* INPUT */
/* */
/* nor_flash NOR flash instance */
/* logical_sector Logical sector */
/* */
/* OUTPUT */
/* */
/* None */
/* */
/* CALLS */
/* */
/* None */
/* */
/* CALLED BY */
/* */
/* Internal LevelX */
/* */
/* 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 */
/* 06-02-2021 Bhupendra Naphade Modified comment(s), */
/* resulting in version 6.1.7 */
/* */
/**************************************************************************/
VOID _lx_nor_flash_sector_mapping_cache_invalidate(LX_NOR_FLASH *nor_flash, ULONG logical_sector)
{
ULONG i;
LX_NOR_SECTOR_MAPPING_CACHE_ENTRY *sector_mapping_cache_entry_ptr;
/* Determine if the sector mapping cache is enabled. */
if (nor_flash -> lx_nor_flash_sector_mapping_cache_enabled)
{
/* Calculate the starting index of the sector mapping cache for this sector entry. */
i = (logical_sector & LX_NOR_SECTOR_MAPPING_CACHE_HASH_MASK) * LX_NOR_SECTOR_MAPPING_CACHE_DEPTH;
/* Build a pointer to the cache entry. */
sector_mapping_cache_entry_ptr = &nor_flash -> lx_nor_flash_sector_mapping_cache[i];
/* Determine if the sector is in the sector mapping cache - assuming the depth of the sector
mapping cache is LX_NOR_SECTOR_MAPPING_CACHE_DEPTH entries. */
if ((sector_mapping_cache_entry_ptr -> lx_nor_sector_mapping_cache_logical_sector) == (logical_sector | LX_NOR_SECTOR_MAPPING_CACHE_ENTRY_VALID))
{
/* Move all cache entries up and invalidate the last entry. */
*(sector_mapping_cache_entry_ptr) = *(sector_mapping_cache_entry_ptr + 1);
*(sector_mapping_cache_entry_ptr + 1) = *(sector_mapping_cache_entry_ptr + 2);
*(sector_mapping_cache_entry_ptr + 2) = *(sector_mapping_cache_entry_ptr + 3);
/* Invalidate the last entry. */
(sector_mapping_cache_entry_ptr + 3) -> lx_nor_sector_mapping_cache_logical_sector = 0;
}
else if (((sector_mapping_cache_entry_ptr + 1) -> lx_nor_sector_mapping_cache_logical_sector) == (logical_sector | LX_NOR_SECTOR_MAPPING_CACHE_ENTRY_VALID))
{
/* Move all subsequent cache entries up and invalidate the last entry. */
*(sector_mapping_cache_entry_ptr + 1) = *(sector_mapping_cache_entry_ptr + 2);
*(sector_mapping_cache_entry_ptr + 2) = *(sector_mapping_cache_entry_ptr + 3);
/* Invalidate the last entry. */
(sector_mapping_cache_entry_ptr + 3) -> lx_nor_sector_mapping_cache_logical_sector = 0;
}
else if (((sector_mapping_cache_entry_ptr + 2) -> lx_nor_sector_mapping_cache_logical_sector) == (logical_sector | LX_NOR_SECTOR_MAPPING_CACHE_ENTRY_VALID))
{
/* Move all subsequent cache entries up and invalidate the last entry. */
*(sector_mapping_cache_entry_ptr + 2) = *(sector_mapping_cache_entry_ptr + 3);
/* Invalidate the last entry. */
(sector_mapping_cache_entry_ptr + 3) -> lx_nor_sector_mapping_cache_logical_sector = 0;
}
else if (((sector_mapping_cache_entry_ptr + 3) -> lx_nor_sector_mapping_cache_logical_sector) == (logical_sector | LX_NOR_SECTOR_MAPPING_CACHE_ENTRY_VALID))
{
/* Simply invalidate the last entry. */
(sector_mapping_cache_entry_ptr + 3) -> lx_nor_sector_mapping_cache_logical_sector = 0;
}
}
}