mirror of https://github.com/acidanthera/audk.git
69 lines
1.9 KiB
ArmAsm
69 lines
1.9 KiB
ArmAsm
//------------------------------------------------------------------------------
|
|
//
|
|
// Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
|
|
// Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
|
|
// Portions copyright (c) 2011 - 2013, ARM Limited. All rights reserved.<BR>
|
|
// This program and the accompanying materials
|
|
// are licensed and made available under the terms and conditions of the BSD License
|
|
// which accompanies this distribution. The full text of the license may be found at
|
|
// http://opensource.org/licenses/bsd-license.php.
|
|
//
|
|
// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
|
|
//
|
|
//------------------------------------------------------------------------------
|
|
|
|
.text
|
|
.align 5
|
|
|
|
GCC_ASM_EXPORT(InternalSwitchStackAsm)
|
|
GCC_ASM_EXPORT(CpuPause)
|
|
|
|
/**
|
|
//
|
|
// This allows the caller to switch the stack and goes to the new entry point
|
|
//
|
|
// @param EntryPoint The pointer to the location to enter
|
|
// @param Context Parameter to pass in
|
|
// @param Context2 Parameter2 to pass in
|
|
// @param NewStack New Location of the stack
|
|
//
|
|
// @return Nothing. Goes to the Entry Point passing in the new parameters
|
|
//
|
|
VOID
|
|
EFIAPI
|
|
InternalSwitchStackAsm (
|
|
SWITCH_STACK_ENTRY_POINT EntryPoint,
|
|
VOID *Context,
|
|
VOID *Context2,
|
|
VOID *NewStack
|
|
);
|
|
**/
|
|
ASM_PFX(InternalSwitchStackAsm):
|
|
mov x30, x0
|
|
mov sp, x3
|
|
mov x0, x1
|
|
mov x1, x2
|
|
ret
|
|
|
|
/**
|
|
//
|
|
// Requests CPU to pause for a short period of time.
|
|
//
|
|
// Requests CPU to pause for a short period of time. Typically used in MP
|
|
// systems to prevent memory starvation while waiting for a spin lock.
|
|
//
|
|
VOID
|
|
EFIAPI
|
|
CpuPause (
|
|
VOID
|
|
)
|
|
**/
|
|
ASM_PFX(CpuPause):
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
ret
|