libgloss/m68k/mc68ec.c

   1 /* mc68ec.c -- Low level support for the Motorola mc68ec0x0 board.
   2  *             Written by rob@cygnus.com (Rob Savoye)
   3  *
   4  * Copyright (c) 1995 Cygnus Support
   5  *
   6  * The authors hereby grant permission to use, copy, modify, distribute,
   7  * and license this software and its documentation for any purpose, provided
   8  * that existing copyright notices are retained in all copies and that this
   9  * notice is included verbatim in any distributions. No written agreement,
  10  * license, or royalty fee is required for any of the authorized uses.
  11  * Modifications to this software may be copyrighted by their authors
  12  * and need not follow the licensing terms described here, provided that
  13  * the new terms are clearly indicated on the first page of each file where
  14  * they apply.
  15  */
  16 #include <sys/types.h>
  17 #include <sys/stat.h>
  18 #include <_ansi.h>
  19 #include <errno.h>
  20 #include "leds.h"
  21
  22 /*
  23  * _exit -- exit the running program. We just cause an exception
  24  *          which makes the program return to the boot monitor
  25  *          prompt. It can be restarted from there.
  26  */
  27 void
  28 _exit (int_status)
  29 {
  30   /* Use `i' constraint to get proper immediate-operand syntax for
  31      target assembler configuration.  */
  32   asm ("trap %0" : : "i" (0));  /* seems to be a harmless vector number */
  33 }
  34
  35 /*
  36  * delay -- delay execution. This is an ugly hack. It should
  37  *          use the timer, but I'm waiting for docs. (sigh)
  38  */
  39 void
  40 delay (int num)
  41 {
  42   while (num--)
  43     {
  44       asm ("nop");
  45     }
  46 }