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ec66159475
Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Pete Batard <pete@akeo.ie> Reviewed-by: Liming Gao <liming.gao@intel.com>
72 lines
1.9 KiB
NASM
72 lines
1.9 KiB
NASM
;------------------------------------------------------------------------------
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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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EXPORT InternalSwitchStackAsm
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EXPORT CpuPause
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AREA BaseLib_LowLevel, CODE, READONLY
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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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;**/
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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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InternalSwitchStackAsm
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mov x29, #0
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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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;**/
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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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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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END
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