#------------------------------------------------------------------------------ | |
# | |
# 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> | |
# SPDX-License-Identifier: BSD-2-Clause-Patent | |
# | |
#------------------------------------------------------------------------------ | |
.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 x29, #0 | |
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 |