release/src-rt/linux/linux-2.6/fs/exfat/exfat_cache.h

   1 /*
   2  *  Copyright (C) 2012-2013 Samsung Electronics Co., Ltd.
   3  *
   4  *  This program is free software; you can redistribute it and/or
   5  *  modify it under the terms of the GNU General Public License
   6  *  as published by the Free Software Foundation; either version 2
   7  *  of the License, or (at your option) any later version.
   8  *
   9  *  This program is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *  GNU General Public License for more details.
  13  *
  14  *  You should have received a copy of the GNU General Public License
  15  *  along with this program; if not, write to the Free Software
  16  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  17  */
  18
  19 /************************************************************************/
  20 /*                                                                      */
  21 /*  PROJECT : exFAT & FAT12/16/32 File System                           */
  22 /*  FILE    : exfat_cache.h                                             */
  23 /*  PURPOSE : Header File for exFAT Cache Manager                       */
  24 /*            (FAT Cache & Buffer Cache)                                */
  25 /*                                                                      */
  26 /*----------------------------------------------------------------------*/
  27 /*  NOTES                                                               */
  28 /*                                                                      */
  29 /*----------------------------------------------------------------------*/
  30 /*  REVISION HISTORY (Ver 0.9)                                          */
  31 /*                                                                      */
  32 /*  - 2010.11.15 [Sung-Kwan Kim] : first writing                        */
  33 /*                                                                      */
  34 /************************************************************************/
  35
  36 #ifndef _EXFAT_CACHE_H
  37 #define _EXFAT_CACHE_H
  38
  39 #include "exfat_config.h"
  40 #include "exfat_global.h"
  41
  42 #ifdef __cplusplus
  43 extern "C" {
  44 #endif /* __cplusplus */
  45
  46   /*----------------------------------------------------------------------*/
  47         /*  Constant & Macro Definitions                                        */
  48         /*----------------------------------------------------------------------*/
  49
  50 #define LOCKBIT                 0x01
  51 #define DIRTYBIT                0x02
  52
  53         /*----------------------------------------------------------------------*/
  54         /*  Type Definitions                                                    */
  55         /*----------------------------------------------------------------------*/
  56
  57         typedef struct __BUF_CACHE_T {
  58                 struct __BUF_CACHE_T *next;
  59                 struct __BUF_CACHE_T *prev;
  60                 struct __BUF_CACHE_T *hash_next;
  61                 struct __BUF_CACHE_T *hash_prev;
  62                 INT32                drv;
  63                 UINT32               sec;
  64                 UINT32               flag;
  65                 struct buffer_head   *buf_bh;
  66         } BUF_CACHE_T;
  67
  68         /*----------------------------------------------------------------------*/
  69         /*  External Function Declarations                                      */
  70         /*----------------------------------------------------------------------*/
  71
  72         INT32  buf_init(struct super_block *sb);
  73         INT32  buf_shutdown(struct super_block *sb);
  74         INT32  FAT_read(struct super_block *sb, UINT32 loc, UINT32 *content);
  75         INT32  FAT_write(struct super_block *sb, UINT32 loc, UINT32 content);
  76         UINT8 *FAT_getblk(struct super_block *sb, UINT32 sec);
  77         void   FAT_modify(struct super_block *sb, UINT32 sec);
  78         void   FAT_release_all(struct super_block *sb);
  79         void   FAT_sync(struct super_block *sb);
  80         UINT8 *buf_getblk(struct super_block *sb, UINT32 sec);
  81         void   buf_modify(struct super_block *sb, UINT32 sec);
  82         void   buf_lock(struct super_block *sb, UINT32 sec);
  83         void   buf_unlock(struct super_block *sb, UINT32 sec);
  84         void   buf_release(struct super_block *sb, UINT32 sec);
  85         void   buf_release_all(struct super_block *sb);
  86         void   buf_sync(struct super_block *sb);
  87
  88 #ifdef __cplusplus
  89 }
  90 #endif /* __cplusplus  */
  91
  92 #endif /* _EXFAT_CACHE_H */
  93
  94 /* end of exfat_cache.h */