mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-28 17:08:18 +01:00
63 lines
1.5 KiB
ArmAsm
63 lines
1.5 KiB
ArmAsm
|
//------------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
|
||
|
|
// Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
|
||
|
|
// Portions copyright (c) 2011, 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 LR, R0
|
||
|
|
MOV SP, R3
|
||
|
|
MOV R0, R1
|
||
|
|
MOV R1, R2
|
||
|
|
BX LR
|
||
|
|
|
||
|
|
/**
|
||
|
|
//
|
||
|
|
// 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
|
||
|
|
BX LR
|