ArmPlatformPkg/Library/ArmPlatformLibNull/AArch64/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 <AsmMacroIoLibV8.h>
  15 #include <Library/ArmLib.h>
  16
  17 ASM_FUNC(ArmPlatformPeiBootAction)
  18   ret
  19
  20 //UINTN
  21 //ArmPlatformGetCorePosition (
  22 //  IN UINTN MpId
  23 //  );
  24 // With this function: CorePos = (ClusterId * 4) + CoreId
  25 ASM_FUNC(ArmPlatformGetCorePosition)
  26   and   x1, x0, #ARM_CORE_MASK
  27   and   x0, x0, #ARM_CLUSTER_MASK
  28   add   x0, x1, x0, LSR #6
  29   ret
  30
  31 //UINTN
  32 //ArmPlatformGetPrimaryCoreMpId (
  33 //  VOID
  34 //  );
  35 ASM_FUNC(ArmPlatformGetPrimaryCoreMpId)
  36   MOV32  (w0, FixedPcdGet32 (PcdArmPrimaryCore))
  37   ret
  38
  39 //UINTN
  40 //ArmPlatformIsPrimaryCore (
  41 //  IN UINTN MpId
  42 //  );
  43 ASM_FUNC(ArmPlatformIsPrimaryCore)
  44   MOV32  (w1, FixedPcdGet32 (PcdArmPrimaryCoreMask))
  45   and   x0, x0, x1
  46   MOV32  (w1, FixedPcdGet32 (PcdArmPrimaryCore))
  47   cmp   w0, w1
  48   mov   x0, #1
  49   mov   x1, #0
  50   csel  x0, x0, x1, eq
  51   ret