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63 lines
1.5 KiB
ArmAsm
63 lines
1.5 KiB
ArmAsm
//------------------------------------------------------------------------------
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//
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// Copyright (c) 2006 - 2018, 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, ARM Limited. All rights reserved.<BR>
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// SPDX-License-Identifier: BSD-2-Clause-Patent
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//
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//------------------------------------------------------------------------------
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.text
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.align 5
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GCC_ASM_EXPORT(InternalSwitchStackAsm)
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GCC_ASM_EXPORT(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 LR, R0
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MOV SP, R3
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MOV R0, R1
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MOV R1, R2
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BX LR
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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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BX LR
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