audk/ArmPkg/Library/ArmLib/ArmV7/ArmV7MPCoreHelper.S

#
#  Copyright (c) 2011, ARM Limited. All rights reserved.
#  
#  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.             
#
#

#include <AsmMacroIoLib.h>
#include <Base.h>
#include <Library/PcdLib.h>
#include <Chipset/ArmV7.h>
#include <AutoGen.h>
#.include AsmMacroIoLib.inc

.text
.align 2

GCC_ASM_EXPORT(ArmIsScuEnable)
GCC_ASM_EXPORT(ArmGetScuBaseAddress)

# IN None
# OUT r0 = SCU Base Address
ASM_PFX(ArmGetScuBaseAddress):
  # Read Configuration Base Address Register. ArmCBar cannot be called to get
  # the Configuration BAR as a stack is not necessary setup. The SCU is at the
  # offset 0x0000 from the Private Memory Region.
  mrc   p15, 4, r0, c15, c0, 0
  bx  lr

# IN  None
# OUT r1 = SCU enabled (boolean)
ASM_PFX(ArmIsScuEnable):
  # Read Configuration Base Address Register. ArmCBar cannot be called to get
  # the Configuration BAR as a stack is not necessary setup. The SCU is at the
  # offset 0x0000 from the Private Memory Region.
  mrc   p15, 4, r0, c15, c0, 0
  add   r1, r0, #SCU_CONTROL_OFFSET
  ldr   r1, [r1]
  and   r1, r1, #1
  bx    lr

ASM_FUNCTION_REMOVE_IF_UNREFERENCED