ArmPlatformPkg/ArmVExpressPkg/ArmVExpressDxe/AArch64/ArmFvpDxeAArch64.c

   1 /** @file
   2
   3   Copyright (c) 2014-2015, ARM Ltd. All rights reserved.
   4
   5   This program and the accompanying materials are licensed and made available
   6   under the terms and conditions of the BSD License which accompanies this
   7   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, WITHOUT
  11   WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #include "ArmVExpressInternal.h"
  16 #include <Library/ArmGicLib.h>
  17
  18 //
  19 // Description of the AARCH64 model platforms :
  20 // Platform ids are defined in ArmVExpressInternal.h for
  21 // all "ArmVExpress-like" platforms (AARCH64 or ARM architecture,
  22 // model or hardware platforms).
  23 //
  24 CONST ARM_VEXPRESS_PLATFORM ArmVExpressPlatforms[] = {
  25   { ARM_FVP_VEXPRESS_AEMv8x4, FixedPcdGetPtr (PcdFdtFvpVExpressAEMv8x4), L"rtsm_ve-aemv8a.dtb" },
  26   { ARM_FVP_BASE, FixedPcdGetPtr (PcdFdtFvpBaseAEMv8x4), L"fvp-base.dtb" },
  27   { ARM_FVP_FOUNDATION, FixedPcdGetPtr (PcdFdtFvpFoundation), L"fvp-foundation.dtb" },
  28   { ARM_FVP_VEXPRESS_UNKNOWN, &gZeroGuid }
  29 };
  30
  31 /**
  32   Get information about the VExpress platform the firmware is running on.
  33
  34   @param[out]  Platform   Address where the pointer to the platform information
  35                           (type ARM_VEXPRESS_PLATFORM*) should be stored.
  36                           The returned pointer does not point to an allocated
  37                           memory area.
  38
  39   @retval  EFI_SUCCESS    The platform information was returned.
  40   @retval  EFI_NOT_FOUND  The platform was not recognised.
  41
  42 **/
  43 EFI_STATUS
  44 ArmVExpressGetPlatform (
  45   OUT CONST ARM_VEXPRESS_PLATFORM** Platform
  46   )
  47 {
  48   EFI_STATUS  Status;
  49   UINT32      SysId;
  50   UINT32      FvpSysId;
  51
  52   ASSERT (Platform != NULL);
  53
  54   Status = EFI_NOT_FOUND;
  55
  56   SysId = MmioRead32 (ARM_VE_SYS_ID_REG);
  57   if (SysId != ARM_RTSM_SYS_ID) {
  58     //
  59     // Keep only the HBI board number and the platform type fields of the
  60     // system id register to identify if we are running on the FVP base or
  61     // foundation model.
  62     //
  63     FvpSysId = SysId & (ARM_FVP_SYS_ID_HBI_MASK |
  64                         ARM_FVP_SYS_ID_PLAT_MASK );
  65
  66     if (FvpSysId == ARM_FVP_BASE_BOARD_SYS_ID) {
  67       Status = ArmVExpressGetPlatformFromId (ARM_FVP_BASE, Platform);
  68     } else if (FvpSysId == ARM_FVP_FOUNDATION_BOARD_SYS_ID) {
  69       Status = ArmVExpressGetPlatformFromId (ARM_FVP_FOUNDATION, Platform);
  70     }
  71   } else {
  72     //
  73     // FVP Versatile Express AEMv8
  74     //
  75     Status = ArmVExpressGetPlatformFromId (ARM_FVP_VEXPRESS_AEMv8x4, Platform);
  76   }
  77
  78   if (EFI_ERROR (Status)) {
  79     DEBUG ((EFI_D_ERROR, "Unsupported AArch64 RTSM (SysId:0x%X).\n", SysId));
  80     ASSERT_EFI_ERROR (Status);
  81   }
  82
  83   return Status;
  84 }