board/MAI/bios_emulator/scitech/src/common/gantdrv.c

   1 /****************************************************************************
   2 *
   3 *                   SciTech Nucleus Graphics Architecture
   4 *
   5 *               Copyright (C) 1991-1998 SciTech Software, Inc.
   6 *                            All rights reserved.
   7 *
   8 *  ======================================================================
   9 *  |REMOVAL OR MODIFICATION OF THIS HEADER IS STRICTLY PROHIBITED BY LAW|
  10 *  |                                                                    |
  11 *  |This copyrighted computer code contains proprietary technology      |
  12 *  |owned by SciTech Software, Inc., located at 505 Wall Street,        |
  13 *  |Chico, CA 95928 USA (http://www.scitechsoft.com).                   |
  14 *  |                                                                    |
  15 *  |The contents of this file are subject to the SciTech Nucleus        |
  16 *  |License; you may *not* use this file or related software except in  |
  17 *  |compliance with the License. You may obtain a copy of the License   |
  18 *  |at http://www.scitechsoft.com/nucleus-license.txt                   |
  19 *  |                                                                    |
  20 *  |Software distributed under the License is distributed on an         |
  21 *  |"AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or      |
  22 *  |implied. See the License for the specific language governing        |
  23 *  |rights and limitations under the License.                           |
  24 *  |                                                                    |
  25 *  |REMOVAL OR MODIFICATION OF THIS HEADER IS STRICTLY PROHIBITED BY LAW|
  26 *  ======================================================================
  27 *
  28 * Language:     ANSI C
  29 * Environment:  NT device driver
  30 *
  31 * Description:  OS specific Nucleus Graphics Architecture services for
  32 *               the NT device drivers.
  33 *
  34 ****************************************************************************/
  35
  36 #include "sdd/sddhelp.h"
  37
  38 /*------------------------- Global Variables ------------------------------*/
  39
  40 static ibool            haveRDTSC;
  41
  42 /*-------------------------- Implementation -------------------------------*/
  43
  44 /****************************************************************************
  45 PARAMETERS:
  46 path    - Local path to the Nucleus driver files.
  47
  48 REMARKS:
  49 This function is used by the application program to override the location
  50 of the Nucleus driver files that are loaded. Normally the loader code
  51 will look in the system Nucleus directories first, then in the 'drivers'
  52 directory relative to the current working directory, and finally relative
  53 to the MGL_ROOT environment variable.
  54 ****************************************************************************/
  55 void NAPI GA_setLocalPath(
  56     const char *path)
  57 {
  58     PM_setLocalBPDPath(path);
  59 }
  60
  61 /****************************************************************************
  62 RETURNS:
  63 Pointer to the system wide PM library imports, or the internal version if none
  64
  65 REMARKS:
  66 Nothing special for this OS.
  67 ****************************************************************************/
  68 PM_imports * NAPI GA_getSystemPMImports(void)
  69 {
  70     return &_PM_imports;
  71 }
  72
  73 /****************************************************************************
  74 REMARKS:
  75 Nothing special for this OS.
  76 ****************************************************************************/
  77 ibool NAPI GA_getSharedExports(
  78     GA_exports *gaExp,
  79     ibool shared)
  80 {
  81     (void)gaExp;
  82     (void)shared;
  83     return false;
  84 }
  85
  86 #ifndef TEST_HARNESS
  87 /****************************************************************************
  88 REMARKS:
  89 Nothing special for this OS
  90 ****************************************************************************/
  91 ibool NAPI GA_queryFunctions(
  92     GA_devCtx *dc,
  93     N_uint32 id,
  94     void _FAR_ *funcs)
  95 {
  96     return __GA_exports.GA_queryFunctions(dc,id,funcs);
  97 }
  98
  99 /****************************************************************************
 100 REMARKS:
 101 Nothing special for this OS
 102 ****************************************************************************/
 103 ibool NAPI REF2D_queryFunctions(
 104     REF2D_driver *ref2d,
 105     N_uint32 id,
 106     void _FAR_ *funcs)
 107 {
 108     return __GA_exports.REF2D_queryFunctions(ref2d,id,funcs);
 109 }
 110 #endif
 111
 112 /****************************************************************************
 113 REMARKS:
 114 This function initialises the high precision timing functions for the
 115 Nucleus loader library.
 116 ****************************************************************************/
 117 ibool NAPI GA_TimerInit(void)
 118 {
 119     if (_GA_haveCPUID() && (_GA_getCPUIDFeatures() & CPU_HaveRDTSC) != 0) {
 120         haveRDTSC = true;
 121         }
 122     return true;
 123 }
 124
 125 /****************************************************************************
 126 REMARKS:
 127 This function reads the high resolution timer.
 128 ****************************************************************************/
 129 void NAPI GA_TimerRead(
 130     GA_largeInteger *value)
 131 {
 132     if (haveRDTSC)
 133         _GA_readTimeStamp(value);
 134     else
 135         KeQuerySystemTime((LARGE_INTEGER*)value);
 136 }