board/MAI/bios_emulator/scitech/src/common/aartt.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:  RTTarget-32
  30 *
  31 * Description:  OS specific Nucleus Graphics Architecture services for
  32 *               the RTTarget-32 operating system environments.
  33 *
  34 ****************************************************************************/
  35
  36 #include "nucleus/graphics.h"
  37
  38 /*------------------------- Global Variables ------------------------------*/
  39
  40 static ibool            haveRDTSC;
  41
  42 /*-------------------------- Implementation -------------------------------*/
  43
  44 /****************************************************************************
  45 REMARKS:
  46 Nothing special for this OS.
  47 ****************************************************************************/
  48 GA_sharedInfo * NAPI GA_getSharedInfo(
  49     int device)
  50 {
  51     (void)device;
  52     return NULL;
  53 }
  54
  55 /****************************************************************************
  56 REMARKS:
  57 Nothing special for this OS.
  58 ****************************************************************************/
  59 ibool NAPI GA_getSharedExports(
  60     GA_exports *gaExp)
  61 {
  62     (void)gaExp;
  63     return false;
  64 }
  65
  66 /****************************************************************************
  67 REMARKS:
  68 This function initialises the high precision timing functions for the
  69 Nucleus loader library.
  70 ****************************************************************************/
  71 ibool NAPI GA_TimerInit(void)
  72 {
  73     if (_GA_haveCPUID() && (_GA_getCPUIDFeatures() & CPU_HaveRDTSC) != 0) {
  74         haveRDTSC = true;
  75         return true;
  76         }
  77     return false;
  78 }
  79
  80 /****************************************************************************
  81 REMARKS:
  82 This function reads the high resolution timer.
  83 ****************************************************************************/
  84 void NAPI GA_TimerRead(
  85     GA_largeInteger *value)
  86 {
  87     if (haveRDTSC)
  88         _GA_readTimeStamp(value);
  89 }