ArmPkg/Library/ArmMmuLib/Arm/ArmMmuLibV7Support.S

   1 #------------------------------------------------------------------------------
   2 #
   3 # Copyright (c) 2016, Linaro Limited. All rights reserved.
   4 #
   5 # This program and the accompanying materials
   6 # are licensed and made available under the terms and conditions of the BSD License
   7 # which accompanies this distribution.  The full text of the license may be found at
   8 # http://opensource.org/licenses/bsd-license.php
   9 #
  10 # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12 #
  13 #------------------------------------------------------------------------------
  14
  15 #include <AsmMacroIoLib.h>
  16
  17 .text
  18 .align 2
  19
  20 GCC_ASM_EXPORT (ArmReadIdMmfr0)
  21 GCC_ASM_EXPORT (ArmHasMpExtensions)
  22
  23 #------------------------------------------------------------------------------
  24
  25 ASM_PFX (ArmHasMpExtensions):
  26   mrc     p15,0,R0,c0,c0,5
  27   // Get Multiprocessing extension (bit31)
  28   lsr     R0, R0, #31
  29   bx      LR
  30
  31 ASM_PFX(ArmReadIdMmfr0):
  32   mrc    p15, 0, r0, c0, c1, 4     @ Read ID_MMFR0 Register
  33   bx     lr
  34
  35 ASM_FUNCTION_REMOVE_IF_UNREFERENCED