board/MAI/bios_emulator/scitech/src/pm/tests/rtc.c

   1 /****************************************************************************
   2 *
   3 *                   SciTech OS Portability Manager Library
   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:  any
  26 *
  27 * Description:  Test program to check the ability to install a C based
  28 *               Real Time Clock interrupt handler.
  29 *
  30 *               Functions tested:   PM_setRealTimeClockHandler()
  31 *                                   PM_restoreRealTimeClockHandler()
  32 *
  33 ****************************************************************************/
  34
  35 #include <stdlib.h>
  36 #include <stdio.h>
  37 #include "pmapi.h"
  38
  39 volatile long count = 0;
  40
  41 #pragma off (check_stack)           /* No stack checking under Watcom   */
  42
  43 void PMAPI RTCHandler(void)
  44 {
  45     count++;
  46 }
  47
  48 int main(void)
  49 {
  50     long            oldCount;
  51     PM_lockHandle   lh;
  52
  53     printf("Program running in ");
  54     switch (PM_getModeType()) {
  55         case PM_realMode:
  56             printf("real mode.\n\n");
  57             break;
  58         case PM_286:
  59             printf("16 bit protected mode.\n\n");
  60             break;
  61         case PM_386:
  62             printf("32 bit protected mode.\n\n");
  63             break;
  64         }
  65
  66     /* Install our timer handler and lock handler pages in memory. It is
  67      * difficult to get the size of a function in C, but we know our
  68      * function is well less than 100 bytes (and an entire 4k page will
  69      * need to be locked by the server anyway).
  70      */
  71     PM_lockCodePages((__codePtr)RTCHandler,100,&lh);
  72     PM_lockDataPages((void*)&count,sizeof(count),&lh);
  73     PM_installBreakHandler();           /* We *DONT* want Ctrl-Breaks! */
  74     PM_setRealTimeClockHandler(RTCHandler,128);
  75     printf("RealTimeClock interrupt handler installed - Hit ESC to exit\n");
  76     oldCount = count;
  77     while (1) {
  78         if (PM_kbhit() && (PM_getch() == 0x1B))
  79             break;
  80         if (count != oldCount) {
  81             printf("Tick, Tock: %ld\n", count);
  82             oldCount = count;
  83             }
  84         }
  85
  86     PM_restoreRealTimeClockHandler();
  87     PM_restoreBreakHandler();
  88     PM_unlockDataPages((void*)&count,sizeof(count),&lh);
  89     PM_unlockCodePages((__codePtr)RTCHandler,100,&lh);
  90     printf("RealTimeClock handler was called %ld times\n", count);
  91     return 0;
  92 }