ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibRTSM/AArch64/RTSMHelper.S

   1 #
   2 #  Copyright (c) 2011-2013, 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 <Base.h>
  16 #include <Library/ArmLib.h>
  17 #include <Library/PcdLib.h>
  18 #include <AutoGen.h>
  19
  20 .text
  21 .align 2
  22
  23 GCC_ASM_EXPORT(ArmPlatformPeiBootAction)
  24 GCC_ASM_EXPORT(ArmPlatformIsPrimaryCore)
  25 GCC_ASM_EXPORT(ArmPlatformGetPrimaryCoreMpId)
  26 GCC_ASM_EXPORT(ArmPlatformGetCorePosition)
  27 GCC_ASM_EXPORT(ArmGetCpuCountPerCluster)
  28
  29 GCC_ASM_IMPORT(_gPcd_FixedAtBuild_PcdArmPrimaryCore)
  30 GCC_ASM_IMPORT(_gPcd_FixedAtBuild_PcdArmPrimaryCoreMask)
  31 GCC_ASM_IMPORT(_gPcd_FixedAtBuild_PcdCoreCount)
  32
  33 ASM_PFX(ArmPlatformPeiBootAction):
  34   ret
  35
  36 //UINTN
  37 //ArmPlatformGetPrimaryCoreMpId (
  38 //  VOID
  39 //  );
  40 ASM_PFX(ArmPlatformGetPrimaryCoreMpId):
  41   LoadConstantToReg (_gPcd_FixedAtBuild_PcdArmPrimaryCore, x0)
  42   ldrh   w0, [x0]
  43   ret
  44
  45 # IN None
  46 # OUT x0 = number of cores present in the system
  47 ASM_PFX(ArmGetCpuCountPerCluster):
  48   LoadConstantToReg (_gPcd_FixedAtBuild_PcdCoreCount, x0)
  49   ldrh  w0, [x0]
  50   ret
  51
  52 //UINTN
  53 //ArmPlatformIsPrimaryCore (
  54 //  IN UINTN MpId
  55 //  );
  56 ASM_PFX(ArmPlatformIsPrimaryCore):
  57   LoadConstantToReg (_gPcd_FixedAtBuild_PcdArmPrimaryCoreMask, x1)
  58   ldrh  w1, [x1]
  59   and   x0, x0, x1
  60   LoadConstantToReg (_gPcd_FixedAtBuild_PcdArmPrimaryCore, x1)
  61   ldrh  w1, [x1]
  62   cmp   w0, w1
  63   b.ne  1f
  64   mov   x0, #1
  65   ret
  66 1:
  67   mov   x0, #0
  68   ret
  69
  70 //UINTN
  71 //ArmPlatformGetCorePosition (
  72 //  IN UINTN MpId
  73 //  );
  74 // With this function: CorePos = (ClusterId * 4) + CoreId
  75 ASM_PFX(ArmPlatformGetCorePosition):
  76   and   x1, x0, #ARM_CORE_MASK
  77   and   x0, x0, #ARM_CLUSTER_MASK
  78   add   x0, x1, x0, LSR #6
  79   ret
  80
  81 ASM_FUNCTION_REMOVE_IF_UNREFERENCED