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 // just the platform id for the time being.
  21 // Platform ids are defined in ArmVExpressInternal.h for
  22 // all "ArmVExpress-like" platforms (AARCH64 or ARM architecture,
  23 // model or hardware platforms).
  24 //
  25 CONST ARM_VEXPRESS_PLATFORM ArmVExpressPlatforms[] = {
  26   { ARM_FVP_VEXPRESS_AEMv8x4, { 0x240d627e, 0xeb4d, 0x447d, { 0x86, 0x30, 0xf2, 0x12, 0x3b, 0xc3, 0x89, 0x3f } }, L"rtsm_ve-aemv8a.dtb" },
  27   { ARM_FVP_BASE_AEMv8x4_AEMv8x4_GICV2, { 0xfbed0b94, 0x3c81, 0x49e4, { 0xbd, 0xec, 0xd4, 0xf4, 0xa8, 0x47, 0xeb, 0x51 } }, L"fvp-base-gicv2-psci.dtb" },
  28   { ARM_FVP_BASE_AEMv8x4_AEMv8x4_GICV2_LEGACY, { 0x6d8dfd91, 0x431a, 0x4e6c, { 0x84, 0x5a, 0x15, 0xf1, 0xfc, 0x8d, 0x9b, 0xe2 } }, L"fvp-base-gicv2legacy-psci.dtb" },
  29   { ARM_FVP_BASE_AEMv8x4_AEMv8x4_GICV3, { 0xa8ac2953, 0xc4bb, 0x4914, { 0x87, 0xf5, 0xc5, 0x97, 0x5d, 0x7b, 0x32, 0xd1 } }, L"fvp-base-gicv3-psci.dtb" },
  30   { ARM_FVP_FOUNDATION_GICV2, { 0x4328cb83, 0x6e50, 0x4cb8, { 0xaa, 0x8c, 0xfb, 0x7a, 0xba, 0xba, 0x37, 0xd8 } }, L"fvp-foundation-gicv2-psci.dtb" },
  31   { ARM_FVP_FOUNDATION_GICV2_LEGACY, { 0x6af00d18, 0x6dfe, 0x45ed, { 0xa6, 0xc4, 0xb4, 0x4d, 0x57, 0xfd, 0xd8, 0xf5 } }, L"fvp-foundation-gicv2legacy-psci.dtb" },
  32   { ARM_FVP_FOUNDATION_GICV3, { 0x4a17b7fa, 0xf052, 0x4dc1, { 0x92, 0x79, 0x43, 0x80, 0x92, 0x41, 0xf9, 0x98 } }, L"fvp-foundation-gicv3-psci.dtb" },
  33   { ARM_FVP_VEXPRESS_UNKNOWN, { 0x0, 0x0, 0x0, { 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 } } }
  34 };
  35
  36 /**
  37   Get information about the VExpress platform the firmware is running on.
  38
  39   @param[out]  Platform   Address where the pointer to the platform information
  40                           (type ARM_VEXPRESS_PLATFORM*) should be stored.
  41                           The returned pointer does not point to an allocated
  42                           memory area.
  43
  44   @retval  EFI_SUCCESS    The platform information was returned.
  45   @retval  EFI_NOT_FOUND  The platform was not recognised.
  46
  47 **/
  48 EFI_STATUS
  49 ArmVExpressGetPlatform (
  50   OUT CONST ARM_VEXPRESS_PLATFORM** Platform
  51   )
  52 {
  53   EFI_STATUS            Status;
  54   UINT32                SysId;
  55   UINT32                FvpSysId;
  56   UINT32                VariantSysId;
  57   ARM_GIC_ARCH_REVISION GicRevision;
  58
  59   ASSERT (Platform != NULL);
  60
  61   Status = EFI_NOT_FOUND;
  62
  63   SysId = MmioRead32 (ARM_VE_SYS_ID_REG);
  64   if (SysId != ARM_RTSM_SYS_ID) {
  65     // Remove the GIC variant to identify if we are running on the FVP Base or
  66     // Foundation models
  67     FvpSysId     = SysId & (ARM_FVP_SYS_ID_HBI_MASK |
  68                             ARM_FVP_SYS_ID_PLAT_MASK );
  69     // Extract the variant from the SysId
  70     VariantSysId = SysId & ARM_FVP_SYS_ID_VARIANT_MASK;
  71
  72     if (FvpSysId == ARM_FVP_BASE_BOARD_SYS_ID) {
  73       if (VariantSysId == ARM_FVP_GIC_VE_MMAP) {
  74         // FVP Base Model with legacy GIC memory map
  75         Status = ArmVExpressGetPlatformFromId (ARM_FVP_BASE_AEMv8x4_AEMv8x4_GICV2_LEGACY, Platform);
  76       } else {
  77         GicRevision = ArmGicGetSupportedArchRevision ();
  78
  79         if (GicRevision == ARM_GIC_ARCH_REVISION_2) {
  80           // FVP Base Model with GICv2 support
  81           Status = ArmVExpressGetPlatformFromId (ARM_FVP_BASE_AEMv8x4_AEMv8x4_GICV2, Platform);
  82         } else {
  83           // FVP Base Model with GICv3 support
  84           Status = ArmVExpressGetPlatformFromId (ARM_FVP_BASE_AEMv8x4_AEMv8x4_GICV3, Platform);
  85         }
  86       }
  87     } else if (FvpSysId == ARM_FVP_FOUNDATION_BOARD_SYS_ID) {
  88       if (VariantSysId == ARM_FVP_GIC_VE_MMAP) {
  89         // FVP Foundation Model with legacy GIC memory map
  90         Status = ArmVExpressGetPlatformFromId (ARM_FVP_FOUNDATION_GICV2_LEGACY, Platform);
  91       } else {
  92         GicRevision = ArmGicGetSupportedArchRevision ();
  93
  94         if (GicRevision == ARM_GIC_ARCH_REVISION_2) {
  95           // FVP Foundation Model with GICv2
  96           Status = ArmVExpressGetPlatformFromId (ARM_FVP_FOUNDATION_GICV2, Platform);
  97         } else {
  98           // FVP Foundation Model with GICv3
  99           Status = ArmVExpressGetPlatformFromId (ARM_FVP_FOUNDATION_GICV3, Platform);
 100         }
 101       }
 102     }
 103   } else {
 104     // FVP Versatile Express AEMv8
 105     Status = ArmVExpressGetPlatformFromId (ARM_FVP_VEXPRESS_AEMv8x4, Platform);
 106   }
 107
 108   if (EFI_ERROR (Status)) {
 109     DEBUG ((EFI_D_ERROR, "Unsupported AArch64 RTSM (SysId:0x%X).\n", SysId));
 110     ASSERT_EFI_ERROR (Status);
 111   }
 112
 113   return Status;
 114 }