ArmPlatformPkg/Library/ArmPlatformLibNull/AArch64/ArmPlatformHelper.S

   1 //
   2 //  Copyright (c) 2012-2013, ARM Limited. All rights reserved.
   3 //
   4 //  SPDX-License-Identifier: BSD-2-Clause-Patent
   5 //
   6 //
   7
   8 #include <AsmMacroIoLibV8.h>
   9 #include <Library/ArmLib.h>
  10
  11 ASM_FUNC(ArmPlatformPeiBootAction)
  12   ret
  13
  14 //UINTN
  15 //ArmPlatformGetCorePosition (
  16 //  IN UINTN MpId
  17 //  );
  18 // With this function: CorePos = (ClusterId * 4) + CoreId
  19 ASM_FUNC(ArmPlatformGetCorePosition)
  20   and   x1, x0, #ARM_CORE_MASK
  21   and   x0, x0, #ARM_CLUSTER_MASK
  22   add   x0, x1, x0, LSR #6
  23   ret
  24
  25 //UINTN
  26 //ArmPlatformGetPrimaryCoreMpId (
  27 //  VOID
  28 //  );
  29 ASM_FUNC(ArmPlatformGetPrimaryCoreMpId)
  30   MOV32  (w0, FixedPcdGet32 (PcdArmPrimaryCore))
  31   ret
  32
  33 //UINTN
  34 //ArmPlatformIsPrimaryCore (
  35 //  IN UINTN MpId
  36 //  );
  37 ASM_FUNC(ArmPlatformIsPrimaryCore)
  38   MOV32  (w1, FixedPcdGet32 (PcdArmPrimaryCoreMask))
  39   and   x0, x0, x1
  40   MOV32  (w1, FixedPcdGet32 (PcdArmPrimaryCore))
  41   cmp   w0, w1
  42   mov   x0, #1
  43   mov   x1, #0
  44   csel  x0, x0, x1, eq
  45   ret