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 <AsmMacroIoLib.h>
  15 #include <Library/ArmLib.h>
  16
  17 .text
  18 .align 3
  19
  20 GCC_ASM_EXPORT(ArmPlatformGetCorePosition)
  21 GCC_ASM_EXPORT(ArmPlatformIsPrimaryCore)
  22
  23 GCC_ASM_IMPORT(_gPcd_FixedAtBuild_PcdArmPrimaryCore)
  24 GCC_ASM_IMPORT(_gPcd_FixedAtBuild_PcdArmPrimaryCoreMask)
  25
  26 //UINTN
  27 //ArmPlatformGetCorePosition (
  28 //  IN UINTN MpId
  29 //  );
  30 ASM_PFX(ArmPlatformGetCorePosition):
  31   and   r1, r0, #ARM_CORE_MASK
  32   and   r0, r0, #ARM_CLUSTER_MASK
  33   add   r0, r1, r0, LSR #7
  34   bx    lr
  35
  36
  37 //UINTN
  38 //ArmPlatformIsPrimaryCore (
  39 //  IN UINTN MpId
  40 //  );
  41 ASM_PFX(ArmPlatformIsPrimaryCore):
  42   LoadConstantToReg (_gPcd_FixedAtBuild_PcdArmPrimaryCoreMask, r1)
  43   ldr   r1, [r1]
  44   and   r0, r0, r1
  45   LoadConstantToReg (_gPcd_FixedAtBuild_PcdArmPrimaryCore, r1)
  46   ldr   r1, [r1]
  47   cmp   r0, r1
  48   moveq r0, #1
  49   movne r0, #0
  50   bx    lr