ArmPlatformPkg/ArmVirtualizationPkg/Library/ArmVirtualizationPlatformLib/AARCH64/VirtHelper.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(ArmGetPhysAddrTop)
  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 //UINTN
  46 //ArmPlatformIsPrimaryCore (
  47 //  IN UINTN MpId
  48 //  );
  49 ASM_PFX(ArmPlatformIsPrimaryCore):
  50   mov   x0, #1
  51   ret
  52
  53 //UINTN
  54 //ArmPlatformGetCorePosition (
  55 //  IN UINTN MpId
  56 //  );
  57 // With this function: CorePos = (ClusterId * 4) + CoreId
  58 ASM_PFX(ArmPlatformGetCorePosition):
  59   and   x1, x0, #ARM_CORE_MASK
  60   and   x0, x0, #ARM_CLUSTER_MASK
  61   add   x0, x1, x0, LSR #6
  62   ret
  63
  64 //EFI_PHYSICAL_ADDRESS
  65 //GetPhysAddrTop (
  66 //  VOID
  67 //  );
  68 ASM_PFX(ArmGetPhysAddrTop):
  69   mrs   x0, id_aa64mmfr0_el1
  70   adr   x1, .LPARanges
  71   and   x0, x0, #7
  72   ldrb  w1, [x1, x0]
  73   mov   x0, #1
  74   lsl   x0, x0, x1
  75   ret
  76
  77 //
  78 // Bits 0..2 of the AA64MFR0_EL1 system register encode the size of the
  79 // physical address space support on this CPU:
  80 // 0 == 32 bits, 1 == 36 bits, etc etc
  81 // 6 and 7 are reserved
  82 //
  83 .LPARanges:
  84   .byte 32, 36, 40, 42, 44, 48, -1, -1
  85
  86 ASM_FUNCTION_REMOVE_IF_UNREFERENCED