1 /* $NetBSD: delay.c,v 1.2 2006/04/22 07:58:53 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 } 50