1 /** @file
2 CpuSleep function for Ia32/X64 GCC.
3
4 Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
5 Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
6 This program and the accompanying materials
7 are licensed and made available under the terms and conditions of the BSD License
8 which accompanies this distribution. The full text of the license may be found at
9 http://opensource.org/licenses/bsd-license.php.
10
11 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
12 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
13
14 **/
15
16
17 /**
18 Places the CPU in a sleep state until an interrupt is received.
19
20 Places the CPU in a sleep state until an interrupt is received. If interrupts
21 are disabled prior to calling this function, then the CPU will be placed in a
22 sleep state indefinitely.
23
24 **/
25 VOID
26 EFIAPI
CpuSleep(VOID)27 CpuSleep (
28 VOID
29 )
30 {
31 __asm__ __volatile__ ("hlt"::: "memory");
32 }
33
34