davmath.h

FDI Intel开发的FLASH文件系统,功能很强大

/* Copyright (c) 1995-2002 Intel Corporation */
/* Intel Confidential                        */

/* ###########################################################################
###  DAV - Direct Access Volume Enhancement for FDI
###
###  Module: davmath.h - DAV Math Types & Macros Include File
###
###  $Workfile: davmath.h $
###  $Revision: 48 $
###  $NoKeywords: $
########################################################################### */

/*                                                               
 *****************************************************************
 * NOTICE OF LICENSE AGREEMENT                                    
 *                                                                
 * This code is provided by Intel Corp., and the use is governed  
 * under the terms of a license agreement. See license agreement  
 * for complete terms of license.                                 
 *                                                                
 * YOU MAY ONLY USE THE SOFTWARE WITH INTEL FLASH PRODUCTS.  YOUR 
 * USE OF THE SOFTWARE WITH ANY OTHER FLASH PRODUCTS IS EXPRESSLY 
 * PROHIBITED UNLESS AND UNTIL YOU APPLY FOR, AND ARE GRANTED IN  
 * INTEL'S SOLE DISCRETION, A SEPARATE WRITTEN SOFTWARE LICENSE   
 * FROM INTEL LICENSING ANY SUCH USE.                             
 *****************************************************************
 */
 

#ifndef __dav_math_h  /* sentry header */
#define __dav_math_h
#if (DIRECT_ACCESS_VOLUME == TRUE)

/*### Global Declarations
#########################*/

/*###                         */
/*### Handle Alignment Macros */
/*###                         */
#define ParagraphAlign(handle)   ((handle) & 0xFFFFFFF0) 
#define ParagraphInc(handle)     ((handle) + 0x10)
#define ParagraphDec(handle)     ((handle) - 0x10)
#define ParagraphMask(handle)    ((handle) & 0xF)

/*###                       */
/*### Page Alignment macros */
/*###                       */
#define PageMask                 (-FDI_PageSize)
#define PageAlign(handle)        ((handle) & PageMask)
#define Page2Para(page)          ((page) * FDI_ParagraphsPerPage)
#define Bytes2Para(byte_count)   DivRoundup(byte_count, FDI_ParagraphLength)

/*###                                                             */
/*### Block Alignment & Conversions                               */
/*###   Block numbers run from 0...n, where n is total blocks - 1 */
/*###                                                             */
#define Handle2Block(handle)     \
           (((handle) - FDI_StartAddress) / FDI_BlockSize)
                                             
#define Block2Handle(block_num)  \
           (((block_num) * FDI_BlockSize) + FDI_StartAddress)
                                               
UINT32 BlockAlign(UINT32 address);                              /**/
/*#define BlockAlign(handle)       \                           **/
/*           (((handle) / FDI_BlockSize) * FDI_BlockSize)      **/

#define RoundUp(value, round_to) \
           (DivRoundup(value, round_to) * round_to)

/*###                                */
/*### Byte 2 DWord Alignment Macro's */
/*###                                */
#define Bytes2Align2DWord(addr32) (~(addr32 + 1) & 0x3)

           
/*### Global Functions
#########################*/

UINT32 DivRoundup(UINT32 numerator, UINT32 divisor);

int IsInBlock(FDI_Handle lo_addr, FDI_Handle hi_addr, UINT32 block_num);

int GetInBlockHiLoAddress(UINT32_PTR lo_addr_ptr, 
                          UINT32_PTR hi_addr_ptr, 
                          UINT32     block_num);

#endif /* sentry */

#endif /* DIRECT_ACCESS_VOLUME */