ArmPlatformPkg/Library/ArmPlatformLibNull/Arm/ArmPlatformHelper.asm

   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   INCLUDE AsmMacroIoLib.inc
  18
  19   EXPORT  ArmPlatformGetCorePosition
  20   EXPORT  ArmPlatformGetPrimaryCoreMpId
  21   EXPORT  ArmPlatformIsPrimaryCore
  22
  23   IMPORT  _gPcd_FixedAtBuild_PcdArmPrimaryCore
  24   IMPORT  _gPcd_FixedAtBuild_PcdArmPrimaryCoreMask
  25
  26   PRESERVE8
  27   AREA    ArmPlatformNullHelper, CODE, READONLY
  28
  29 //UINTN
  30 //ArmPlatformGetCorePosition (
  31 //  IN UINTN MpId
  32 //  );
  33 ArmPlatformGetCorePosition FUNCTION
  34   and   r1, r0, #ARM_CORE_MASK
  35   and   r0, r0, #ARM_CLUSTER_MASK
  36   add   r0, r1, r0, LSR #7
  37   bx    lr
  38   ENDFUNC
  39
  40 //UINTN
  41 //ArmPlatformGetPrimaryCoreMpId (
  42 //  VOID
  43 //  );
  44 ArmPlatformGetPrimaryCoreMpId FUNCTION
  45   LoadConstantToReg (_gPcd_FixedAtBuild_PcdArmPrimaryCoreMask, r0)
  46   ldr   r0, [r0]
  47   bx    lr
  48   ENDFUNC
  49
  50 //UINTN
  51 //ArmPlatformIsPrimaryCore (
  52 //  IN UINTN MpId
  53 //  );
  54 ArmPlatformIsPrimaryCore FUNCTION
  55   LoadConstantToReg (_gPcd_FixedAtBuild_PcdArmPrimaryCoreMask, r1)
  56   ldr   r1, [r1]
  57   and   r0, r0, r1
  58   LoadConstantToReg (_gPcd_FixedAtBuild_PcdArmPrimaryCore, r1)
  59   ldr   r1, [r1]
  60   cmp   r0, r1
  61   moveq r0, #1
  62   movne r0, #0
  63   bx    lr
  64   ENDFUNC
  65
  66   END
  67