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(ArmPlatformGetPrimaryCoreMpId)
  22 GCC_ASM_EXPORT(ArmPlatformIsPrimaryCore)
  23
  24 GCC_ASM_IMPORT(_gPcd_FixedAtBuild_PcdArmPrimaryCore)
  25 GCC_ASM_IMPORT(_gPcd_FixedAtBuild_PcdArmPrimaryCoreMask)
  26
  27 //UINTN
  28 //ArmPlatformGetCorePosition (
  29 //  IN UINTN MpId
  30 //  );
  31 ASM_PFX(ArmPlatformGetCorePosition):
  32   and   r1, r0, #ARM_CORE_MASK
  33   and   r0, r0, #ARM_CLUSTER_MASK
  34   add   r0, r1, r0, LSR #7
  35   bx    lr
  36
  37 //UINTN
  38 //ArmPlatformGetPrimaryCoreMpId (
  39 //  VOID
  40 //  );
  41 ASM_PFX(ArmPlatformGetPrimaryCoreMpId):
  42   LoadConstantToReg (_gPcd_FixedAtBuild_PcdArmPrimaryCoreMask, r0)
  43   ldr   r0, [r0]
  44   bx    lr
  45
  46 //UINTN
  47 //ArmPlatformIsPrimaryCore (
  48 //  IN UINTN MpId
  49 //  );
  50 ASM_PFX(ArmPlatformIsPrimaryCore):
  51   LoadConstantToReg (_gPcd_FixedAtBuild_PcdArmPrimaryCoreMask, r1)
  52   ldr   r1, [r1]
  53   and   r0, r0, r1
  54   LoadConstantToReg (_gPcd_FixedAtBuild_PcdArmPrimaryCore, r1)
  55   ldr   r1, [r1]
  56   cmp   r0, r1
  57   moveq r0, #1
  58   movne r0, #0
  59   bx    lr