ArmVirtPkg/Library/ArmVirtPlatformLib/AARCH64/VirtHelper.S

   1 #
   2 #  Copyright (c) 2011-2013, ARM Limited. All rights reserved.
   3 #  Copyright (c) 2016, Linaro 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 ASM_FUNC(ArmPlatformPeiBootAction)
  19   ret
  20
  21 //UINTN
  22 //ArmPlatformGetPrimaryCoreMpId (
  23 //  VOID
  24 //  );
  25 ASM_FUNC(ArmPlatformGetPrimaryCoreMpId)
  26   MOV32  (w0, FixedPcdGet32 (PcdArmPrimaryCore))
  27   ret
  28
  29 //UINTN
  30 //ArmPlatformIsPrimaryCore (
  31 //  IN UINTN MpId
  32 //  );
  33 ASM_FUNC(ArmPlatformIsPrimaryCore)
  34   mov   x0, #1
  35   ret
  36
  37 //UINTN
  38 //ArmPlatformGetCorePosition (
  39 //  IN UINTN MpId
  40 //  );
  41 // With this function: CorePos = (ClusterId * 4) + CoreId
  42 ASM_FUNC(ArmPlatformGetCorePosition)
  43   and   x1, x0, #ARM_CORE_MASK
  44   and   x0, x0, #ARM_CLUSTER_MASK
  45   add   x0, x1, x0, LSR #6
  46   ret
  47
  48 //EFI_PHYSICAL_ADDRESS
  49 //GetPhysAddrTop (
  50 //  VOID
  51 //  );
  52 ASM_FUNC(ArmGetPhysAddrTop)
  53   mrs   x0, id_aa64mmfr0_el1
  54   adr   x1, .LPARanges
  55   and   x0, x0, #7
  56   ldrb  w1, [x1, x0]
  57   mov   x0, #1
  58   lsl   x0, x0, x1
  59   ret
  60
  61 //
  62 // Bits 0..2 of the AA64MFR0_EL1 system register encode the size of the
  63 // physical address space support on this CPU:
  64 // 0 == 32 bits, 1 == 36 bits, etc etc
  65 // 6 and 7 are reserved
  66 //
  67 .LPARanges:
  68   .byte 32, 36, 40, 42, 44, 48, -1, -1
  69
  70 ASM_FUNCTION_REMOVE_IF_UNREFERENCED