fx_media_cache_invalidate.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 | /** FileX Component */ | ||
| 17 | /** */ | ||
| 18 | /** Media */ | ||
| 19 | /** */ | ||
| 20 | /**************************************************************************/ | ||
| 21 | /**************************************************************************/ | ||
| 22 | |||
| 23 | #define FX_SOURCE_CODE | ||
| 24 | |||
| 25 | |||
| 26 | /* Include necessary system files. */ | ||
| 27 | |||
| 28 | #include "fx_api.h" | ||
| 29 | #include "fx_media.h" | ||
| 30 | #include "fx_utility.h" | ||
| 31 | |||
| 32 | |||
| 33 | /**************************************************************************/ | ||
| 34 | /* */ | ||
| 35 | /* FUNCTION RELEASE */ | ||
| 36 | /* */ | ||
| 37 | /* _fx_media_cache_invalidate PORTABLE C */ | ||
| 38 | /* 6.1 */ | ||
| 39 | /* AUTHOR */ | ||
| 40 | /* */ | ||
| 41 | /* William E. Lamie, Microsoft Corporation */ | ||
| 42 | /* */ | ||
| 43 | /* DESCRIPTION */ | ||
| 44 | /* */ | ||
| 45 | /* This function examines the logical cache, flushing written sectors */ | ||
| 46 | /* out to the media and invalidating all sectors in the logical cache. */ | ||
| 47 | /* */ | ||
| 48 | /* INPUT */ | ||
| 49 | /* */ | ||
| 50 | /* media_ptr Media control block pointer */ | ||
| 51 | /* */ | ||
| 52 | /* OUTPUT */ | ||
| 53 | /* */ | ||
| 54 | /* return status */ | ||
| 55 | /* */ | ||
| 56 | /* CALLS */ | ||
| 57 | /* */ | ||
| 58 | /* _fx_utility_FAT_flush Flush cached FAT entries */ | ||
| 59 | /* _fx_utility_FAT_map_flush Flush primary FAT changes to */ | ||
| 60 | /* secondary FAT(s) */ | ||
| 61 | /* _fx_utility_logical_sector_flush Flush logical sector cache */ | ||
| 62 | /* */ | ||
| 63 | /* CALLED BY */ | ||
| 64 | /* */ | ||
| 65 | /* Application Code */ | ||
| 66 | /* */ | ||
| 67 | /**************************************************************************/ | ||
| 68 | 27594 | UINT _fx_media_cache_invalidate(FX_MEDIA *media_ptr) | |
| 69 | { | ||
| 70 | |||
| 71 | UINT status; | ||
| 72 | UINT i; | ||
| 73 | |||
| 74 | |||
| 75 | #ifndef FX_MEDIA_STATISTICS_DISABLE | ||
| 76 | |||
| 77 | /* Increment the number of times this service has been called. */ | ||
| 78 | 27594 | media_ptr -> fx_media_flushes++; | |
| 79 | #endif | ||
| 80 | |||
| 81 | /* Check the media to make sure it is open. */ | ||
| 82 |
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27594 | if (media_ptr -> fx_media_id != FX_MEDIA_ID) |
| 83 | { | ||
| 84 | |||
| 85 | /* Return the media not opened error. */ | ||
| 86 | 9 | return(FX_MEDIA_NOT_OPEN); | |
| 87 | } | ||
| 88 | |||
| 89 | /* If trace is enabled, insert this event into the trace buffer. */ | ||
| 90 | FX_TRACE_IN_LINE_INSERT(FX_TRACE_MEDIA_CACHE_INVALIDATE, media_ptr, 0, 0, 0, FX_TRACE_MEDIA_EVENTS, 0, 0) | ||
| 91 | |||
| 92 | /* Protect against other threads accessing the media. */ | ||
| 93 | 15318 | FX_PROTECT | |
| 94 | /* Flush the cached individual FAT entries */ | ||
| 95 | 27585 | _fx_utility_FAT_flush(media_ptr); | |
| 96 | |||
| 97 | /* Flush changed sector(s) in the primary FAT to secondary FATs. */ | ||
| 98 | 27585 | _fx_utility_FAT_map_flush(media_ptr); | |
| 99 | |||
| 100 | /* Clear the FAT cache entry array. */ | ||
| 101 |
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1793025 | for (i = 0; i < FX_MAX_FAT_CACHE; i++) |
| 102 | { | ||
| 103 | |||
| 104 | /* Clear entry in the FAT cache. */ | ||
| 105 | 1765440 | media_ptr -> fx_media_fat_cache[i].fx_fat_cache_entry_cluster = 0; | |
| 106 | 1765440 | media_ptr -> fx_media_fat_cache[i].fx_fat_cache_entry_value = 0; | |
| 107 | } | ||
| 108 | |||
| 109 | /* Clear the secondary FAT update map. */ | ||
| 110 |
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55170 | for (i = 0; i < FX_FAT_MAP_SIZE; i++) |
| 111 | { | ||
| 112 | |||
| 113 | /* Clear bit map entry for secondary FAT update. */ | ||
| 114 | 27585 | media_ptr -> fx_media_fat_secondary_update_map[i] = 0; | |
| 115 | } | ||
| 116 | |||
| 117 | /* Call the logical sector flush to invalidate the logical sector cache. */ | ||
| 118 | 27585 | status = _fx_utility_logical_sector_flush(media_ptr, ((ULONG64) 1), (ULONG64) (media_ptr -> fx_media_total_sectors), FX_TRUE); | |
| 119 | |||
| 120 | /* Release media protection. */ | ||
| 121 | 15318 | FX_UNPROTECT | |
| 122 | |||
| 123 | /* If we get here, return successful status to the caller. */ | ||
| 124 | 27585 | return(status); | |
| 125 | } | ||
| 126 | |||
| 127 |