ArmPkg/Library/ArmMmuLib/Arm/ArmMmuLibV7Support.S

   1 #------------------------------------------------------------------------------
   2 #
   3 # Copyright (c) 2016, Linaro Limited. All rights reserved.
   4 #
   5 # SPDX-License-Identifier: BSD-2-Clause-Patent
   6 #
   7 #------------------------------------------------------------------------------
   8
   9 #include <AsmMacroIoLib.h>
  10
  11 .text
  12 .align 2
  13
  14 GCC_ASM_EXPORT (ArmReadIdMmfr0)
  15 GCC_ASM_EXPORT (ArmHasMpExtensions)
  16
  17 #------------------------------------------------------------------------------
  18
  19 ASM_PFX (ArmHasMpExtensions):
  20   mrc     p15,0,R0,c0,c0,5
  21   // Get Multiprocessing extension (bit31)
  22   lsr     R0, R0, #31
  23   bx      LR
  24
  25 ASM_PFX(ArmReadIdMmfr0):
  26   mrc    p15, 0, r0, c0, c1, 4     @ Read ID_MMFR0 Register
  27   bx     lr
  28
  29 ASM_FUNCTION_REMOVE_IF_UNREFERENCED