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https://github.com/eclipse-threadx/levelx.git
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113 lines
5.3 KiB
C
113 lines
5.3 KiB
C
/***************************************************************************
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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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/** 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_block_find PORTABLE C */
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/* 6.2.1 */
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/* AUTHOR */
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/* */
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/* Xiuwen Cai, Microsoft Corporation */
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/* */
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/* DESCRIPTION */
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/* */
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/* This function attempts to find the mapped block for the logical */
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/* sector in the mapping table. */
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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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/* logical_sector Logical sector number */
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/* superceded_check Check for page being */
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/* superceded (can happen if */
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/* on interruptions of page */
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/* write) */
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/* block Destination for block */
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/* page Destination for page */
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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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/* None */
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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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/**************************************************************************/
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UINT _lx_nand_flash_block_find(LX_NAND_FLASH *nand_flash, ULONG logical_sector, ULONG *block, USHORT *block_status)
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{
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UINT block_mapping_index;
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USHORT block_number;
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/* Get the mapping index from logic sector address. */
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block_mapping_index = logical_sector / nand_flash -> lx_nand_flash_pages_per_block;
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/* Check the address range. */
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if (block_mapping_index >= nand_flash -> lx_nand_flash_block_mapping_table_size / sizeof(*nand_flash -> lx_nand_flash_block_mapping_table))
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{
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/* Out of range, return an error. */
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return(LX_ERROR);
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}
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/* Get the block number from mapping table. */
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block_number = nand_flash -> lx_nand_flash_block_mapping_table[block_mapping_index];
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/* Check if it is mapped. */
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if (block_number != LX_NAND_BLOCK_UNMAPPED)
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{
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/* Return the block status. */
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*block_status = nand_flash -> lx_nand_flash_block_status_table[block_number];
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}
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/* Return the block number. */
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*block = (ULONG)block_number;
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/* Return successful completion. */
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return(LX_SUCCESS);
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}
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