lx_nand_flash_block_find.c
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|---|---|---|---|
| 1 | /*************************************************************************** | ||
| 2 | * Copyright (c) 2024 Microsoft Corporation | ||
| 3 | * Copyright (c) 2026-present Eclipse ThreadX contributors | ||
| 4 | * | ||
| 5 | * This program and the accompanying materials are made available under the | ||
| 6 | * terms of the MIT License which is available at | ||
| 7 | * https://opensource.org/licenses/MIT. | ||
| 8 | * | ||
| 9 | * SPDX-License-Identifier: MIT | ||
| 10 | **************************************************************************/ | ||
| 11 | |||
| 12 | |||
| 13 | /**************************************************************************/ | ||
| 14 | /**************************************************************************/ | ||
| 15 | /** */ | ||
| 16 | /** LevelX Component */ | ||
| 17 | /** */ | ||
| 18 | /** NAND Flash */ | ||
| 19 | /** */ | ||
| 20 | /**************************************************************************/ | ||
| 21 | /**************************************************************************/ | ||
| 22 | |||
| 23 | #define LX_SOURCE_CODE | ||
| 24 | |||
| 25 | |||
| 26 | /* Disable ThreadX error checking. */ | ||
| 27 | |||
| 28 | #ifndef LX_DISABLE_ERROR_CHECKING | ||
| 29 | #define LX_DISABLE_ERROR_CHECKING | ||
| 30 | #endif | ||
| 31 | |||
| 32 | |||
| 33 | /* Include necessary system files. */ | ||
| 34 | |||
| 35 | #include "lx_api.h" | ||
| 36 | |||
| 37 | |||
| 38 | /**************************************************************************/ | ||
| 39 | /* */ | ||
| 40 | /* FUNCTION RELEASE */ | ||
| 41 | /* */ | ||
| 42 | /* _lx_nand_flash_block_find PORTABLE C */ | ||
| 43 | /* 6.2.1 */ | ||
| 44 | /* AUTHOR */ | ||
| 45 | /* */ | ||
| 46 | /* Xiuwen Cai, Microsoft Corporation */ | ||
| 47 | /* */ | ||
| 48 | /* DESCRIPTION */ | ||
| 49 | /* */ | ||
| 50 | /* This function attempts to find the mapped block for the logical */ | ||
| 51 | /* sector in the mapping table. */ | ||
| 52 | /* */ | ||
| 53 | /* INPUT */ | ||
| 54 | /* */ | ||
| 55 | /* nand_flash NAND flash instance */ | ||
| 56 | /* logical_sector Logical sector number */ | ||
| 57 | /* superceded_check Check for page being */ | ||
| 58 | /* superceded (can happen if */ | ||
| 59 | /* on interruptions of page */ | ||
| 60 | /* write) */ | ||
| 61 | /* block Destination for block */ | ||
| 62 | /* page Destination for page */ | ||
| 63 | /* */ | ||
| 64 | /* OUTPUT */ | ||
| 65 | /* */ | ||
| 66 | /* return status */ | ||
| 67 | /* */ | ||
| 68 | /* CALLS */ | ||
| 69 | /* */ | ||
| 70 | /* None */ | ||
| 71 | /* */ | ||
| 72 | /* CALLED BY */ | ||
| 73 | /* */ | ||
| 74 | /* Internal LevelX */ | ||
| 75 | /* */ | ||
| 76 | /**************************************************************************/ | ||
| 77 | 866240 | UINT _lx_nand_flash_block_find(LX_NAND_FLASH *nand_flash, ULONG logical_sector, ULONG *block, USHORT *block_status) | |
| 78 | { | ||
| 79 | |||
| 80 | UINT block_mapping_index; | ||
| 81 | USHORT block_number; | ||
| 82 | |||
| 83 | |||
| 84 | /* Get the mapping index from logic sector address. */ | ||
| 85 | 866240 | block_mapping_index = logical_sector / nand_flash -> lx_nand_flash_pages_per_block; | |
| 86 | |||
| 87 | /* Check the address range. */ | ||
| 88 |
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866240 | if (block_mapping_index >= nand_flash -> lx_nand_flash_block_mapping_table_size / sizeof(*nand_flash -> lx_nand_flash_block_mapping_table)) |
| 89 | { | ||
| 90 | |||
| 91 | /* Out of range, return an error. */ | ||
| 92 | ✗ | return(LX_ERROR); | |
| 93 | } | ||
| 94 | |||
| 95 | /* Get the block number from mapping table. */ | ||
| 96 | 866240 | block_number = nand_flash -> lx_nand_flash_block_mapping_table[block_mapping_index]; | |
| 97 | |||
| 98 | /* Check if it is mapped. */ | ||
| 99 |
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866240 | if (block_number != LX_NAND_BLOCK_UNMAPPED) |
| 100 | { | ||
| 101 | |||
| 102 | /* Return the block status. */ | ||
| 103 | 378120 | *block_status = nand_flash -> lx_nand_flash_block_status_table[block_number]; | |
| 104 | } | ||
| 105 | |||
| 106 | /* Return the block number. */ | ||
| 107 | 866240 | *block = (ULONG)block_number; | |
| 108 | |||
| 109 | /* Return successful completion. */ | ||
| 110 | 866240 | return(LX_SUCCESS); | |
| 111 | } | ||
| 112 | |||
| 113 |