1 // Copyright (c) 1996-2009 Nokia Corporation and/or its subsidiary(-ies).

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of the License "Eclipse Public License v1.0"

     5 // which accompanies this distribution, and is available

     6 // at the URL "http://www.eclipse.org/legal/epl-v10.html".

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 // f32\sfat32\fat_config.h

    15 // FAT fsy configurator

    16 // 

    17 //

    18 

    19 /**

    20  @file

    21  @internalTechnology

    22 */

    23 

    24 #ifndef FAT_CONFIGURATOR_H

    25 #define FAT_CONFIGURATOR_H

    26 

    27 #include <f32dbg.h>

    28 //-----------------------------------------------------------------------------

    29 

    30 /**

    31     This class provides access to the FAT settings in estart.txt file and the interface to 

    32     get these setting to the client (CFatMountCB).

    33 */

    34 class TFatConfig

    35     {

    36  public:   

    37 

    38     TFatConfig();

    39     void ReadConfig(TInt aDrvNumber, TBool aForceRead = EFalse);

    40 

    41     //-- parameters getters

    42     inline TBool ScanDrvSkipFinalisedVolume() const;

    43     inline TBool FAT32_AsynchMount() const;

    44     inline TBool FAT32_UseFSInfoOnMount() const;

    45     inline TBool FAT32_UseBitSupercache() const;

    46 

    47 

    48     inline TUint32 DirCacheSize() const;

    49     inline TUint32 DirCacheMaxPageSizeLog2() const;

    50 

    51     inline void Fat16FixedCacheParams(TUint32& aRdGrLog2, TUint32& aWrGrLog2) const;

    52     inline void Fat32LruCacheParams(TUint32& aRdGrLog2, TUint32& aWrGrLog2, TUint32& aCacheSize) const;

    53     inline TBool FAT16_UseCleanShutDownBit() const;

    54 

    55     inline TUint32 LeafDirCacheSize() const;

    56     inline TUint32 DynamicDirCacheSizeMin() const;

    57     inline TUint32 DynamicDirCacheSizeMax() const;

    58     inline TUint32 DynamicDirCacheMaxPageSizeLog2() const;

    59 

    60  protected:

    61 

    62     TFatConfig(const TFatConfig&);

    63     TFatConfig& operator=(const TFatConfig&);

    64 

    65     TUint32 ReadUint(const TDesC8& aSection, const TDesC8& aKeyName, TUint32 aDefaultValue) const; 

    66 

    67  private:

    68     

    69     void DumpParameters() const;   

    70     void DoDumpUintParam(const TDesC8& aKeyName, TUint32 aParam) const; 

    71 

    72     void ProcessDirCacheParams(const TDesC8& aSection);

    73     void ProcessFatCacheParams(const TDesC8& aSection);

    74     void ProcessDynamicDirCacheParams(const TDesC8& aSection);

    75 

    76  private:

    77     

    78     TUint32 iInitialised : 1; //-- ETrue if the object is initialised, i.e. ReadConfig() called

    79 

    80     //-- cached FAT parameters, see appropriate methods description

    81     

    82     //-- boolean values

    83     TUint32 iScanDrvSkipFinalisedVolume :1; ///< if 1 ScanDrive will skip properly finalised volumes

    84     TUint32 iFAT32_AsynchMount          :1; ///< if 1 FAT3 Asynchronous mounting is enabled  

    85     TUint32 iFAT32_UseFSInfoOnMount     :1; ///< 1 enables using FSInfo sector on FAT32 volumes

    86     TUint32 iFAT32_UseBitSupercache     :1; ///< 1 enables using FAT32 bit supercache for fast free cluster lookup

    87     TUint32 iFAT16_UseCleanShutDownBit  :1; ///< if 1 "clean shutdown mask" bit in FAT16[1] will be used during volume finalisations.

    88 

    89     //---

    90 

    91     TUint16 iDirCacheSizeKB;                ///< directory cache size, Kbytes

    92     TUint16 iDirCacheMaxPageSizeLog2;       ///< Log2(Max. dir. cache page size)

    93 

    94     TUint16 iFat16FixedCacheReadGrLog2;     ///< Log2(FAT16 fixed cache read granularity)

    95     TUint16 iFat16FixedCacheWriteGrLog2;    ///< Log2(FAT16 fixed cache write granularity)

    96 

    97     TUint16 iFat32LRUCacheSizeKB;           ///< FAT32 LRU cache size, Kbytes

    98     TUint16 iFat32LRUCacheReadGrLog2;       ///< Log2(FAT32 LRU cache read granularity)

    99     TUint16 iFat32LRUCacheWriteGrLog2;      ///< Log2(FAT32 LRU cache write granularity)

   100     

   101     TUint32 iLeafDirCacheSize;              ///< leaf directory cache size, maximum number of most recently visited leaf dirs to be cached

   102     TUint32 iDynamicDirCacheSizeMinKB;      ///< minimum directory cache size, Kbytes

   103     TUint32 iDynamicDirCacheSizeMaxKB;      ///< maximum directory cache size, Kbytes

   104     TUint32 iDynamicDirCacheMaxPageSizeLog2;///< Log2(maximum dynamic dir cache page size)

   105 

   106     };

   107 

   108 #include"fat_config.inl"

   109 

   110 #endif //FAT_CONFIGURATOR_H

   111 

   112 

   113 

   114 

   115 

   116