ArmPlatformPkg/ArmJunoPkg/Library/ArmJunoLib/AArch64/ArmJunoHelper.S

   1 /** @file
   2 *
   3 *  Copyright (c) 2013-2014, ARM Limited. All rights reserved.
   4 *
   5 *  This program and the accompanying materials
   6 *  are licensed and made available under the terms and conditions of the BSD License
   7 *  which accompanies this distribution.  The full text of the license may be found at
   8 *  http://opensource.org/licenses/bsd-license.php
   9 *
  10 *  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 *  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12 *
  13 **/
  14
  15 #include <AsmMacroIoLibV8.h>
  16 #include <Library/ArmLib.h>
  17
  18 //UINTN
  19 //ArmPlatformGetCorePosition (
  20 //  IN UINTN MpId
  21 //  );
  22 // With this function: CorePos = (ClusterId * 2) + CoreId
  23 ASM_FUNC(ArmPlatformGetCorePosition)
  24   and   x1, x0, #ARM_CORE_MASK
  25   and   x0, x0, #ARM_CLUSTER_MASK
  26   add   x0, x1, x0, LSR #7
  27   ret
  28
  29 //UINTN
  30 //ArmPlatformGetPrimaryCoreMpId (
  31 //  VOID
  32 //  );
  33 ASM_FUNC(ArmPlatformGetPrimaryCoreMpId)
  34   ldr   w0, PrimaryCoreMpid
  35   ret
  36
  37 //UINTN
  38 //ArmPlatformIsPrimaryCore (
  39 //  IN UINTN MpId
  40 //  );
  41 ASM_FUNC(ArmPlatformIsPrimaryCore)
  42   MOV32 (w1, FixedPcdGet32 (PcdArmPrimaryCoreMask))
  43   and   x0, x0, x1
  44
  45   ldr   w1, PrimaryCoreMpid
  46
  47   cmp   w0, w1
  48   cset  x0, eq
  49   ret
  50
  51 ASM_FUNC(ArmPlatformPeiBootAction)
  52   // The trusted firmware passes the primary CPU MPID through x0 register.
  53   // Save it in a variable.
  54   adr  x1, PrimaryCoreMpid
  55   str  w0, [x1]
  56   ret
  57
  58 PrimaryCoreMpid:  .word    0x0