| /**************************************************************************** |
| * |
| * 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 __cplusplus |
| extern "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); |
| #else |
| void _ASMAPI _MTRR_readMSR(ulong reg, ulong *eax, ulong *edx); |
| #endif |
| void _ASMAPI _MTRR_writeMSR(ulong reg, ulong eax, ulong edx); |
| |
| #ifdef __cplusplus |
| } /* End of "C" linkage for C++ */ |
| #endif |
| |
| #endif /* __MTRR_H */ |