board/MAI/bios_emulator/scitech/src/pm/stub/cpuinfo.c

   1 /****************************************************************************
   2 *
   3 *                         Ultra Long Period Timer
   4 *
   5 *  ========================================================================
   6 *
   7 *    The contents of this file are subject to the SciTech MGL Public
   8 *    License Version 1.0 (the "License"); you may not use this file
   9 *    except in compliance with the License. You may obtain a copy of
  10 *    the License at http://www.scitechsoft.com/mgl-license.txt
  11 *
  12 *    Software distributed under the License is distributed on an
  13 *    "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
  14 *    implied. See the License for the specific language governing
  15 *    rights and limitations under the License.
  16 *
  17 *    The Original Code is Copyright (C) 1991-1998 SciTech Software, Inc.
  18 *
  19 *    The Initial Developer of the Original Code is SciTech Software, Inc.
  20 *    All Rights Reserved.
  21 *
  22 *  ========================================================================
  23 *
  24 * Language:     ANSI C
  25 * Environment:  *** TODO: ADD YOUR OS ENVIRONMENT NAME HERE ***
  26 *
  27 * Description:  Module to implement OS specific services to measure the
  28 *               CPU frequency.
  29 *
  30 ****************************************************************************/
  31
  32 /*----------------------------- Implementation ----------------------------*/
  33
  34 /****************************************************************************
  35 REMARKS:
  36 Increase the thread priority to maximum, if possible.
  37 ****************************************************************************/
  38 static int SetMaxThreadPriority(void)
  39 {
  40     /* TODO: If you have thread priorities, increase it to maximum for the */
  41     /*       thread for timing the CPU frequency. */
  42     return oldPriority;
  43 }
  44
  45 /****************************************************************************
  46 REMARKS:
  47 Restore the original thread priority.
  48 ****************************************************************************/
  49 static void RestoreThreadPriority(
  50     int priority)
  51 {
  52     /* TODO: Restore the original thread priority on exit. */
  53 }
  54
  55 /****************************************************************************
  56 REMARKS:
  57 Initialise the counter and return the frequency of the counter.
  58 ****************************************************************************/
  59 static void GetCounterFrequency(
  60     CPU_largeInteger *freq)
  61 {
  62     /* TODO: Return the frequency of the counter in here. You should try to */
  63     /*       normalise this value to be around 100,000 ticks per second. */
  64     freq->low = 0;
  65     freq->high = 0;
  66 }
  67
  68 /****************************************************************************
  69 REMARKS:
  70 Read the counter and return the counter value.
  71
  72 TODO: Implement this to read the counter. It should be done as a macro
  73       for accuracy.
  74 ****************************************************************************/
  75 #define GetCounter(t)               \
  76 {                                   \
  77     (t)->low = 0;                   \
  78     (t)->high = 0;                  \
  79 }