73 lines
2.6 KiB
C
73 lines
2.6 KiB
C
/****************************************************************************
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*
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* SciTech OS Portability Manager Library
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*
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* ========================================================================
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*
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* The contents of this file are subject to the SciTech MGL Public
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* License Version 1.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.scitechsoft.com/mgl-license.txt
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*
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* Software distributed under the License is distributed on an
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* "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is Copyright (C) 1991-1998 SciTech Software, Inc.
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*
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* The Initial Developer of the Original Code is SciTech Software, Inc.
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* All Rights Reserved.
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*
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* ========================================================================
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*
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* Language: ANSI C
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* Environment: Any
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*
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* Description: Include file defining the external ring 0 helper functions
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* needed by the MTRR module. These functions may be included
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* directly for native ring 0 device drivers, or they may
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* be calls down to a ring 0 helper device driver where
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* appropriate (or the entire MTRR module may be located in
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* the device driver if the device driver is 32-bit).
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*
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****************************************************************************/
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#ifndef __MTRR_H
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#define __MTRR_H
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#include "scitech.h"
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/*--------------------------- Function Prototypes -------------------------*/
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#ifdef __cplusplus
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extern "C" { /* Use "C" linkage when in C++ mode */
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#endif
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/* Internal functions (requires ring 0 access or helper functions!) */
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void MTRR_init(void);
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int MTRR_enableWriteCombine(ulong base,ulong size,uint type);
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/* External assembler helper functions */
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ibool _ASMAPI _MTRR_isRing0(void);
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ulong _ASMAPI _MTRR_disableInt(void);
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void _ASMAPI _MTRR_restoreInt(ulong flags);
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ulong _ASMAPI _MTRR_saveCR4(void);
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void _ASMAPI _MTRR_restoreCR4(ulong cr4Val);
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uchar _ASMAPI _MTRR_getCx86(uchar reg);
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void _ASMAPI _MTRR_setCx86(uchar reg,uchar data);
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#ifdef __16BIT__
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void _ASMAPI _MTRR_readMSR(ulong reg, ulong far *eax, ulong far *edx);
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#else
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void _ASMAPI _MTRR_readMSR(ulong reg, ulong *eax, ulong *edx);
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#endif
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void _ASMAPI _MTRR_writeMSR(ulong reg, ulong eax, ulong edx);
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#ifdef __cplusplus
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} /* End of "C" linkage for C++ */
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#endif
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#endif /* __MTRR_H */
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