ArmPlatformPkg/Library/ArmPlatformLibNull/Arm/ArmPlatformHelper.asm

   1 //
   2 //  Copyright (c) 2012-2013, 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  ArmPlatformPeiBootAction
  20   EXPORT  ArmPlatformGetCorePosition
  21   EXPORT  ArmPlatformGetPrimaryCoreMpId
  22   EXPORT  ArmPlatformIsPrimaryCore
  23
  24   IMPORT  _gPcd_FixedAtBuild_PcdArmPrimaryCore
  25   IMPORT  _gPcd_FixedAtBuild_PcdArmPrimaryCoreMask
  26
  27   PRESERVE8
  28   AREA    ArmPlatformNullHelper, CODE, READONLY
  29
  30 ArmPlatformPeiBootAction FUNCTION
  31   bx    lr
  32   ENDFUNC
  33
  34 //UINTN
  35 //ArmPlatformGetCorePosition (
  36 //  IN UINTN MpId
  37 //  );
  38 ArmPlatformGetCorePosition FUNCTION
  39   and   r1, r0, #ARM_CORE_MASK
  40   and   r0, r0, #ARM_CLUSTER_MASK
  41   add   r0, r1, r0, LSR #7
  42   bx    lr
  43   ENDFUNC
  44
  45 //UINTN
  46 //ArmPlatformGetPrimaryCoreMpId (
  47 //  VOID
  48 //  );
  49 ArmPlatformGetPrimaryCoreMpId FUNCTION
  50   LoadConstantToReg (_gPcd_FixedAtBuild_PcdArmPrimaryCore, r0)
  51   ldr   r0, [r0]
  52   bx    lr
  53   ENDFUNC
  54
  55 //UINTN
  56 //ArmPlatformIsPrimaryCore (
  57 //  IN UINTN MpId
  58 //  );
  59 ArmPlatformIsPrimaryCore FUNCTION
  60   LoadConstantToReg (_gPcd_FixedAtBuild_PcdArmPrimaryCoreMask, r1)
  61   ldr   r1, [r1]
  62   and   r0, r0, r1
  63   LoadConstantToReg (_gPcd_FixedAtBuild_PcdArmPrimaryCore, r1)
  64   ldr   r1, [r1]
  65   cmp   r0, r1
  66   moveq r0, #1
  67   movne r0, #0
  68   bx    lr
  69   ENDFUNC
  70
  71   END
  72