sys/arch/ia64/stand/efi/libefi/delay.c

   1 /*      $NetBSD: delay.c,v 1.1 2006/04/07 14:21:32 cherry Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2001 Doug Rabson
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 #include <sys/cdefs.h>
  30 /* __FBSDID("$FreeBSD: src/sys/boot/efi/libefi/delay.c,v 1.3 2003/04/03 21:36:29 obrien Exp $"); */
  31
  32 #include <efi.h>
  33 #include <efilib.h>
  34
  35 void
  36 delay(int usecs)
  37 {
  38         static EFI_EVENT ev = 0;
  39         UINTN junk;
  40
  41         if (!ev) {
  42                 if (BS->CreateEvent(EVT_TIMER, TPL_APPLICATION, 0, 0, &ev)
  43                     != EFI_SUCCESS)
  44                         return;
  45         }
  46
  47         BS->SetTimer(ev, TimerRelative, usecs * 10);
  48         BS->WaitForEvent(1, &ev, &junk);
  49 }