ArmPlatformPkg/Library/ArmPlatformLibNull/Arm/ArmPlatformHelper.S

   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 .text
  18 .align 2
  19
  20 GCC_ASM_EXPORT(ArmPlatformPeiBootAction)
  21 GCC_ASM_EXPORT(ArmPlatformGetCorePosition)
  22 GCC_ASM_EXPORT(ArmPlatformGetPrimaryCoreMpId)
  23 GCC_ASM_EXPORT(ArmPlatformIsPrimaryCore)
  24
  25 GCC_ASM_IMPORT(_gPcd_FixedAtBuild_PcdArmPrimaryCore)
  26 GCC_ASM_IMPORT(_gPcd_FixedAtBuild_PcdArmPrimaryCoreMask)
  27
  28 ASM_PFX(ArmPlatformPeiBootAction):
  29   bx    lr
  30
  31 //UINTN
  32 //ArmPlatformGetCorePosition (
  33 //  IN UINTN MpId
  34 //  );
  35 ASM_PFX(ArmPlatformGetCorePosition):
  36   and   r1, r0, #ARM_CORE_MASK
  37   and   r0, r0, #ARM_CLUSTER_MASK
  38   add   r0, r1, r0, LSR #7
  39   bx    lr
  40
  41 //UINTN
  42 //ArmPlatformGetPrimaryCoreMpId (
  43 //  VOID
  44 //  );
  45 ASM_PFX(ArmPlatformGetPrimaryCoreMpId):
  46   LoadConstantToReg (_gPcd_FixedAtBuild_PcdArmPrimaryCore, r0)
  47   ldr   r0, [r0]
  48   bx    lr
  49
  50 //UINTN
  51 //ArmPlatformIsPrimaryCore (
  52 //  IN UINTN MpId
  53 //  );
  54 ASM_PFX(ArmPlatformIsPrimaryCore):
  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