807e2604ab
Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Harry Liebel <Harry.Liebel@arm.com> Signed-off-by: Olivier Martin <olivier.martin@arm.com> Reviewed-by: Liming Gao <liming.gao@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14515 6f19259b-4bc3-4df7-8a09-765794883524
69 lines
1.9 KiB
ArmAsm
69 lines
1.9 KiB
ArmAsm
//------------------------------------------------------------------------------
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//
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// Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
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// Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
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// Portions copyright (c) 2011 - 2013, ARM Limited. All rights reserved.<BR>
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// This program and the accompanying materials
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// are licensed and made available under the terms and conditions of the BSD License
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// which accompanies this distribution. The full text of the license may be found at
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// http://opensource.org/licenses/bsd-license.php.
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//
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// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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//
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//------------------------------------------------------------------------------
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.text
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.align 5
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ASM_GLOBAL ASM_PFX(InternalSwitchStackAsm)
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ASM_GLOBAL ASM_PFX(CpuPause)
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/**
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//
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// This allows the caller to switch the stack and goes to the new entry point
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//
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// @param EntryPoint The pointer to the location to enter
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// @param Context Parameter to pass in
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// @param Context2 Parameter2 to pass in
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// @param NewStack New Location of the stack
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//
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// @return Nothing. Goes to the Entry Point passing in the new parameters
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//
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VOID
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EFIAPI
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InternalSwitchStackAsm (
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SWITCH_STACK_ENTRY_POINT EntryPoint,
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VOID *Context,
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VOID *Context2,
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VOID *NewStack
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);
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**/
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ASM_PFX(InternalSwitchStackAsm):
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mov x30, x0
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mov sp, x3
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mov x0, x1
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mov x1, x2
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ret
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/**
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//
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// Requests CPU to pause for a short period of time.
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//
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// Requests CPU to pause for a short period of time. Typically used in MP
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// systems to prevent memory starvation while waiting for a spin lock.
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//
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VOID
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EFIAPI
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CpuPause (
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VOID
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)
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**/
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ASM_PFX(CpuPause):
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nop
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nop
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nop
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nop
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nop
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ret
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