ArmPkg/Library/ArmLib/ArmV7/ArmV7MPCoreHelper.S

   1 #
   2 #  Copyright (c) 2011, ARM Limited. All rights reserved.
   3 #
   4 #  This program and the accompanying materials
   5 #  are licensed and made available under the terms and conditions of the BSD License
   6 #  which accompanies this distribution.  The full text of the license may be found at
   7 #  http:#opensource.org/licenses/bsd-license.php
   8 #
   9 #  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 #  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11 #
  12 #
  13
  14 #include <AsmMacroIoLib.h>
  15 #include <Base.h>
  16 #include <Library/PcdLib.h>
  17 #include <Chipset/ArmV7.h>
  18 #include <AutoGen.h>
  19 #.include AsmMacroIoLib.inc
  20
  21 .text
  22 .align 2
  23
  24 GCC_ASM_EXPORT(ArmIsScuEnable)
  25 GCC_ASM_EXPORT(ArmGetScuBaseAddress)
  26
  27 # IN None
  28 # OUT r0 = SCU Base Address
  29 ASM_PFX(ArmGetScuBaseAddress):
  30   # Read Configuration Base Address Register. ArmCBar cannot be called to get
  31   # the Configuration BAR as a stack is not necessary setup. The SCU is at the
  32   # offset 0x0000 from the Private Memory Region.
  33   mrc   p15, 4, r0, c15, c0, 0
  34   bx\s\slr
  35
  36 # IN  None
  37 # OUT r1 = SCU enabled (boolean)
  38 ASM_PFX(ArmIsScuEnable):
  39   # Read Configuration Base Address Register. ArmCBar cannot be called to get
  40   # the Configuration BAR as a stack is not necessary setup. The SCU is at the
  41   # offset 0x0000 from the Private Memory Region.
  42   mrc   p15, 4, r0, c15, c0, 0
  43   add   r1, r0, #SCU_CONTROL_OFFSET
  44   ldr   r1, [r1]
  45   and   r1, r1, #1
  46   bx    lr
  47
  48 ASM_FUNCTION_REMOVE_IF_UNREFERENCED