ArmPlatformPkg/Library/ArmPlatformLibNull/Arm/ArmPlatformHelper.S

   1 //
   2 //  Copyright (c) 2012, 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 <Library/ArmLib.h>
  15
  16 .text
  17 .align 3
  18
  19 GCC_ASM_EXPORT(ArmPlatformGetCorePosition)
  20
  21 //UINTN
  22 //ArmPlatformGetCorePosition (
  23 //  IN UINTN MpId
  24 //  );
  25 ASM_PFX(ArmPlatformGetCorePosition):
  26   and   r1, r0, #ARM_CORE_MASK
  27   and   r0, r0, #ARM_CLUSTER_MASK
  28   add   r0, r1, r0, LSR #7
  29   bx    lr
  30