mirror of
https://github.com/eclipse-threadx/levelx.git
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153 lines
7.6 KiB
C
153 lines
7.6 KiB
C
/**************************************************************************/
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/* */
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/* Copyright (c) Microsoft Corporation. All rights reserved. */
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/* */
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/* This software is licensed under the Microsoft Software License */
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/* Terms for Microsoft Azure RTOS. Full text of the license can be */
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/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
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/* and in the root directory of this software. */
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/* */
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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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/** NAND 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_nand_flash_driver_extra_bytes_get PORTABLE C */
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/* 6.1.7 */
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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 calls the driver to get the extra bytes of a NAND */
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/* page. */
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/* */
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/* INPUT */
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/* */
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/* nand_flash NAND flash instance */
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/* block Block number */
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/* page Page number */
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/* destination Pointer to destination buffer */
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/* words Number of words to read */
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/* */
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/* OUTPUT */
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/* */
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/* Completion Status */
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/* */
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/* CALLS */
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/* */
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/* (lx_nand_flash_driver_extra_bytes_get)Get extra bytes from spare */
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/* */
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/* CALLED BY */
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/* */
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/* Internal LevelX */
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/* */
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/* RELEASE HISTORY */
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/* */
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/* DATE NAME DESCRIPTION */
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/* */
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/* 05-19-2020 William E. Lamie Initial Version 6.0 */
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/* 09-30-2020 William E. Lamie Modified comment(s), */
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/* resulting in version 6.1 */
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/* 06-02-2021 Bhupendra Naphade Modified comment(s), */
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/* resulting in version 6.1.7 */
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/* */
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/**************************************************************************/
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UINT _lx_nand_flash_driver_extra_bytes_get(LX_NAND_FLASH *nand_flash, ULONG block, ULONG page, UCHAR *destination, UINT size)
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{
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ULONG *source_ptr;
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ULONG *destination_ptr;
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ULONG cache_index;
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UINT status;
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/* Determine if the page extra bytes cache is disabled. */
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if (nand_flash -> lx_nand_flash_page_extra_bytes_cache == LX_NULL)
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{
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/* Increment the page extra bytes get count. */
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nand_flash -> lx_nand_flash_diagnostic_page_extra_bytes_gets++;
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/* Call driver extra bytes get function. */
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status = (nand_flash -> lx_nand_flash_driver_extra_bytes_get)(block, page, destination, size);
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}
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else
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{
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/* Calculate the cache index. */
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cache_index = (block * nand_flash -> lx_nand_flash_pages_per_block) + page;
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/* Setup the destination pointer. */
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destination_ptr = (ULONG *) destination;
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/* Determine if this cache entry is valid. */
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if (nand_flash -> lx_nand_flash_page_extra_bytes_cache[cache_index].lx_nand_page_extra_info_logical_sector != 0)
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{
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/* Simply return this value. */
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*destination_ptr = nand_flash -> lx_nand_flash_page_extra_bytes_cache[cache_index].lx_nand_page_extra_info_logical_sector;
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/* Increment the number of page extra bytes cache hits. */
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nand_flash -> lx_nand_flash_diagnostic_page_extra_bytes_cache_hits++;
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/* Return successful status. */
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status = LX_SUCCESS;
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}
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else
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{
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/* Increment the page extra bytes get count. */
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nand_flash -> lx_nand_flash_diagnostic_page_extra_bytes_gets++;
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/* Call driver extra bytes get function. */
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status = (nand_flash -> lx_nand_flash_driver_extra_bytes_get)(block, page, destination, size);
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/* Increment the number of page extra bytes cache misses. */
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nand_flash -> lx_nand_flash_diagnostic_page_extra_bytes_cache_misses++;
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/* Setup destination pointer. */
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destination_ptr = &nand_flash -> lx_nand_flash_page_extra_bytes_cache[cache_index].lx_nand_page_extra_info_logical_sector;
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/* Setup source pointer. */
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source_ptr = (ULONG *) destination;
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/* Save the value in the page extra bytes cache. */
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*destination_ptr = *source_ptr;
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}
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}
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/* Return status. */
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return(status);
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}
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