1 //------------------------------------------------------------------------------
3 // Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
4 // Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
5 // Portions copyright (c) 2011, ARM Limited. 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.
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.
14 //------------------------------------------------------------------------------
19 GCC_ASM_EXPORT(InternalSwitchStackAsm)
20 GCC_ASM_EXPORT(CpuPause)
24 // This allows the caller to switch the stack and goes to the new entry point
26 // @param EntryPoint The pointer to the location to enter
27 // @param Context Parameter to pass in
28 // @param Context2 Parameter2 to pass in
29 // @param NewStack New Location of the stack
31 // @return Nothing. Goes to the Entry Point passing in the new parameters
35 InternalSwitchStackAsm (
36 SWITCH_STACK_ENTRY_POINT EntryPoint,
42 ASM_PFX(InternalSwitchStackAsm):
51 // Requests CPU to pause for a short period of time.
53 // Requests CPU to pause for a short period of time. Typically used in MP
54 // systems to prevent memory starvation while waiting for a spin lock.