/******************************************************************************                   SciTech OS Portability Manager Library**  ========================================================================**    The contents of this file are subject to the SciTech MGL Public*    License Version 1.0 (the "License"); you may not use this file*    except in compliance with the License. You may obtain a copy of*    the License at http://www.scitechsoft.com/mgl-license.txt**    Software distributed under the License is distributed on an*    "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or*    implied. See the License for the specific language governing*    rights and limitations under the License.**    The Original Code is Copyright (C) 1991-1998 SciTech Software, Inc.**    The Initial Developer of the Original Code is SciTech Software, Inc.*    All Rights Reserved.**  ========================================================================** Language:     ANSI C* Environment:  Any** Description:  Include file defining the external ring 0 helper functions*               needed by the MTRR module. These functions may be included*               directly for native ring 0 device drivers, or they may*               be calls down to a ring 0 helper device driver where*               appropriate (or the entire MTRR module may be located in*               the device driver if the device driver is 32-bit).*****************************************************************************/#ifndef __MTRR_H#define __MTRR_H#include "scitech.h"/*--------------------------- Function Prototypes -------------------------*/#ifdef  __cplusplusextern "C" {            /* Use "C" linkage when in C++ mode */#endif/* Internal functions (requires ring 0 access or helper functions!) */void    MTRR_init(void);int     MTRR_enableWriteCombine(ulong base,ulong size,uint type);/* External assembler helper functions */ibool   _ASMAPI _MTRR_isRing0(void);ulong   _ASMAPI _MTRR_disableInt(void);void    _ASMAPI _MTRR_restoreInt(ulong flags);ulong   _ASMAPI _MTRR_saveCR4(void);void    _ASMAPI _MTRR_restoreCR4(ulong cr4Val);uchar   _ASMAPI _MTRR_getCx86(uchar reg);void    _ASMAPI _MTRR_setCx86(uchar reg,uchar data);#ifdef  __16BIT__void    _ASMAPI _MTRR_readMSR(ulong reg, ulong far *eax, ulong far *edx);#elsevoid    _ASMAPI _MTRR_readMSR(ulong reg, ulong *eax, ulong *edx);#endifvoid    _ASMAPI _MTRR_writeMSR(ulong reg, ulong eax, ulong edx);#ifdef  __cplusplus}                       /* End of "C" linkage for C++   */#endif#endif  /* __MTRR_H */