[mirror_edk2.git] / ArmVirtPkg / VirtFdtDxe / VirtFdtDxe.c

/** @file\r
*  Device tree enumeration DXE driver for ARM Virtual Machines\r
*\r
*  Copyright (c) 2014, Linaro Ltd. All rights reserved.<BR>\r
*\r
*  This program and the accompanying materials are\r
*  licensed and made available under the terms and conditions of the BSD License\r
*  which accompanies this distribution.  The full text of the license may be found at\r
*  http://opensource.org/licenses/bsd-license.php\r
*\r
*  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
*  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
*\r
**/\r
\r
#include <Library/BaseLib.h>\r
#include <Library/DebugLib.h>\r
#include <Library/UefiLib.h>\r
#include <Library/BaseMemoryLib.h>\r
#include <Library/UefiDriverEntryPoint.h>\r
#include <Library/MemoryAllocationLib.h>\r
#include <Library/UefiBootServicesTableLib.h>\r
#include <Library/VirtioMmioDeviceLib.h>\r
#include <Library/DevicePathLib.h>\r
#include <Library/PcdLib.h>\r
#include <Library/DxeServicesLib.h>\r
#include <Library/HobLib.h>\r
#include <libfdt.h>\r
#include <Library/XenIoMmioLib.h>\r
\r
#include <Guid/Fdt.h>\r
#include <Guid/VirtioMmioTransport.h>\r
#include <Guid/FdtHob.h>\r
\r
#pragma pack (1)\r
typedef struct {\r
  VENDOR_DEVICE_PATH                  Vendor;\r
  UINT64                              PhysBase;\r
  EFI_DEVICE_PATH_PROTOCOL            End;\r
} VIRTIO_TRANSPORT_DEVICE_PATH;\r
#pragma pack ()\r
\r
typedef enum {\r
  PropertyTypeUnknown,\r
  PropertyTypeRtc,\r
  PropertyTypeVirtio,\r
  PropertyTypeUart,\r
  PropertyTypeTimer,\r
  PropertyTypeFwCfg,\r
  PropertyTypePciHost,\r
  PropertyTypeXen,\r
} PROPERTY_TYPE;\r
\r
typedef struct {\r
  PROPERTY_TYPE Type;\r
  CHAR8         Compatible[32];\r
} PROPERTY;\r
\r
STATIC CONST PROPERTY CompatibleProperties[] = {\r
  { PropertyTypeRtc,     "arm,pl031"             },\r
  { PropertyTypeVirtio,  "virtio,mmio"           },\r
  { PropertyTypeUart,    "arm,pl011"             },\r
  { PropertyTypeTimer,   "arm,armv7-timer"       },\r
  { PropertyTypeTimer,   "arm,armv8-timer"       },\r
  { PropertyTypeFwCfg,   "qemu,fw-cfg-mmio"      },\r
  { PropertyTypePciHost, "pci-host-ecam-generic" },\r
  { PropertyTypeXen,     "xen,xen"               },\r
  { PropertyTypeUnknown, ""                      }\r
};\r
\r
typedef struct {\r
  UINT32  Type;\r
  UINT32  Number;\r
  UINT32  Flags;\r
} INTERRUPT_PROPERTY;\r
\r
STATIC\r
PROPERTY_TYPE\r
GetTypeFromNode (\r
  IN CONST CHAR8 *NodeType,\r
  IN UINTN       Size\r
  )\r
{\r
  CONST CHAR8    *Compatible;\r
  CONST PROPERTY *CompatibleProperty;\r
\r
  //\r
  // A 'compatible' node may contain a sequence of NULL terminated\r
  // compatible strings so check each one\r
  //\r
  for (Compatible = NodeType; Compatible < NodeType + Size && *Compatible;\r
       Compatible += 1 + AsciiStrLen (Compatible)) {\r
    for (CompatibleProperty = CompatibleProperties; CompatibleProperty->Compatible[0]; CompatibleProperty++) {\r
      if (AsciiStrCmp (CompatibleProperty->Compatible, Compatible) == 0) {\r
        return CompatibleProperty->Type;\r
      }\r
    }\r
  }\r
  return PropertyTypeUnknown;\r
}\r
\r
//\r
// We expect the "ranges" property of "pci-host-ecam-generic" to consist of\r
// records like this.\r
//\r
#pragma pack (1)\r
typedef struct {\r
  UINT32 Type;\r
  UINT64 ChildBase;\r
  UINT64 CpuBase;\r
  UINT64 Size;\r
} DTB_PCI_HOST_RANGE_RECORD;\r
#pragma pack ()\r
\r
#define DTB_PCI_HOST_RANGE_RELOCATABLE  BIT31\r
#define DTB_PCI_HOST_RANGE_PREFETCHABLE BIT30\r
#define DTB_PCI_HOST_RANGE_ALIASED      BIT29\r
#define DTB_PCI_HOST_RANGE_MMIO32       BIT25\r
#define DTB_PCI_HOST_RANGE_MMIO64       (BIT25 | BIT24)\r
#define DTB_PCI_HOST_RANGE_IO           BIT24\r
#define DTB_PCI_HOST_RANGE_TYPEMASK     (BIT31 | BIT30 | BIT29 | BIT25 | BIT24)\r
\r
/**\r
  Process the device tree node describing the generic PCI host controller.\r
\r
  param[in] DeviceTreeBase  Pointer to the device tree.\r
\r
  param[in] Node            Offset of the device tree node whose "compatible"\r
                            property is "pci-host-ecam-generic".\r
\r
  param[in] RegProp         Pointer to the "reg" property of Node. The caller\r
                            is responsible for ensuring that the size of the\r
                            property is 4 UINT32 cells.\r
\r
  @retval EFI_SUCCESS         Parsing successful, properties parsed from Node\r
                              have been stored in dynamic PCDs.\r
\r
  @retval EFI_PROTOCOL_ERROR  Parsing failed. PCDs are left unchanged.\r
**/\r
STATIC\r
EFI_STATUS\r
EFIAPI\r
ProcessPciHost (\r
  IN CONST VOID *DeviceTreeBase,\r
  IN INT32      Node,\r
  IN CONST VOID *RegProp\r
  )\r
{\r
  UINT64     ConfigBase, ConfigSize;\r
  CONST VOID *Prop;\r
  INT32      Len;\r
  UINT32     BusMin, BusMax;\r
  UINT32     RecordIdx;\r
  UINT64     IoBase, IoSize, IoTranslation;\r
  UINT64     MmioBase, MmioSize, MmioTranslation;\r
\r
  //\r
  // Fetch the ECAM window.\r
  //\r
  ConfigBase = fdt64_to_cpu (((CONST UINT64 *)RegProp)[0]);\r
  ConfigSize = fdt64_to_cpu (((CONST UINT64 *)RegProp)[1]);\r
\r
  //\r
  // Fetch the bus range (note: inclusive).\r
  //\r
  Prop = fdt_getprop (DeviceTreeBase, Node, "bus-range", &Len);\r
  if (Prop == NULL || Len != 2 * sizeof(UINT32)) {\r
    DEBUG ((EFI_D_ERROR, "%a: 'bus-range' not found or invalid\n",\r
      __FUNCTION__));\r
    return EFI_PROTOCOL_ERROR;\r
  }\r
  BusMin = fdt32_to_cpu (((CONST UINT32 *)Prop)[0]);\r
  BusMax = fdt32_to_cpu (((CONST UINT32 *)Prop)[1]);\r
\r
  //\r
  // Sanity check: the config space must accommodate all 4K register bytes of\r
  // all 8 functions of all 32 devices of all buses.\r
  //\r
  if (BusMax < BusMin || BusMax - BusMin == MAX_UINT32 ||\r
      DivU64x32 (ConfigSize, SIZE_4KB * 8 * 32) < BusMax - BusMin + 1) {\r
    DEBUG ((EFI_D_ERROR, "%a: invalid 'bus-range' and/or 'reg'\n",\r
      __FUNCTION__));\r
    return EFI_PROTOCOL_ERROR;\r
  }\r
\r
  //\r
  // Iterate over "ranges".\r
  //\r
  Prop = fdt_getprop (DeviceTreeBase, Node, "ranges", &Len);\r
  if (Prop == NULL || Len == 0 ||\r
      Len % sizeof (DTB_PCI_HOST_RANGE_RECORD) != 0) {\r
    DEBUG ((EFI_D_ERROR, "%a: 'ranges' not found or invalid\n", __FUNCTION__));\r
    return EFI_PROTOCOL_ERROR;\r
  }\r
\r
  //\r
  // IoBase, IoTranslation, MmioBase and MmioTranslation are initialized only\r
  // in order to suppress '-Werror=maybe-uninitialized' warnings *incorrectly*\r
  // emitted by some gcc versions.\r
  //\r
  IoBase = 0;\r
  IoTranslation = 0;\r
  MmioBase = 0;\r
  MmioTranslation = 0;\r
\r
  //\r
  // IoSize and MmioSize are initialized to zero because the logic below\r
  // requires it.\r
  //\r
  IoSize = 0;\r
  MmioSize = 0;\r
  for (RecordIdx = 0; RecordIdx < Len / sizeof (DTB_PCI_HOST_RANGE_RECORD);\r
       ++RecordIdx) {\r
    CONST DTB_PCI_HOST_RANGE_RECORD *Record;\r
\r
    Record = (CONST DTB_PCI_HOST_RANGE_RECORD *)Prop + RecordIdx;\r
    switch (fdt32_to_cpu (Record->Type) & DTB_PCI_HOST_RANGE_TYPEMASK) {\r
    case DTB_PCI_HOST_RANGE_IO:\r
      IoBase = fdt64_to_cpu (Record->ChildBase);\r
      IoSize = fdt64_to_cpu (Record->Size);\r
      IoTranslation = fdt64_to_cpu (Record->CpuBase) - IoBase;\r
      break;\r
\r
    case DTB_PCI_HOST_RANGE_MMIO32:\r
      MmioBase = fdt64_to_cpu (Record->ChildBase);\r
      MmioSize = fdt64_to_cpu (Record->Size);\r
      MmioTranslation = fdt64_to_cpu (Record->CpuBase) - MmioBase;\r
\r
      if (MmioBase > MAX_UINT32 || MmioSize > MAX_UINT32 ||\r
          MmioBase + MmioSize > SIZE_4GB) {\r
        DEBUG ((EFI_D_ERROR, "%a: MMIO32 space invalid\n", __FUNCTION__));\r
        return EFI_PROTOCOL_ERROR;\r
      }\r
\r
      if (MmioTranslation != 0) {\r
        DEBUG ((EFI_D_ERROR, "%a: unsupported nonzero MMIO32 translation "\r
          "0x%Lx\n", __FUNCTION__, MmioTranslation));\r
        return EFI_UNSUPPORTED;\r
      }\r
\r
      break;\r
    }\r
  }\r
  if (IoSize == 0 || MmioSize == 0) {\r
    DEBUG ((EFI_D_ERROR, "%a: %a space empty\n", __FUNCTION__,\r
      (IoSize == 0) ? "IO" : "MMIO32"));\r
    return EFI_PROTOCOL_ERROR;\r
  }\r
\r
  PcdSet64 (PcdPciExpressBaseAddress, ConfigBase);\r
\r
  PcdSet32 (PcdPciBusMin, BusMin);\r
  PcdSet32 (PcdPciBusMax, BusMax);\r
\r
  PcdSet64 (PcdPciIoBase,        IoBase);\r
  PcdSet64 (PcdPciIoSize,        IoSize);\r
  PcdSet64 (PcdPciIoTranslation, IoTranslation);\r
\r
  PcdSet32 (PcdPciMmio32Base, (UINT32)MmioBase);\r
  PcdSet32 (PcdPciMmio32Size, (UINT32)MmioSize);\r
\r
  PcdSetBool (PcdPciDisableBusEnumeration, FALSE);\r
\r
  DEBUG ((EFI_D_INFO, "%a: Config[0x%Lx+0x%Lx) Bus[0x%x..0x%x] "\r
    "Io[0x%Lx+0x%Lx)@0x%Lx Mem[0x%Lx+0x%Lx)@0x%Lx\n", __FUNCTION__, ConfigBase,\r
    ConfigSize, BusMin, BusMax, IoBase, IoSize, IoTranslation, MmioBase,\r
    MmioSize, MmioTranslation));\r
  return EFI_SUCCESS;\r
}\r
\r
\r
EFI_STATUS\r
EFIAPI\r
InitializeVirtFdtDxe (\r
  IN EFI_HANDLE           ImageHandle,\r
  IN EFI_SYSTEM_TABLE     *SystemTable\r
  )\r
{\r
  VOID                           *Hob;\r
  VOID                           *DeviceTreeBase;\r
  INT32                          Node, Prev;\r
  INT32                          RtcNode;\r
  EFI_STATUS                     Status;\r
  CONST CHAR8                    *Type;\r
  INT32                          Len;\r
  PROPERTY_TYPE                  PropType;\r
  CONST VOID                     *RegProp;\r
  VIRTIO_TRANSPORT_DEVICE_PATH   *DevicePath;\r
  EFI_HANDLE                     Handle;\r
  UINT64                         RegBase;\r
  CONST INTERRUPT_PROPERTY       *InterruptProp;\r
  INT32                          SecIntrNum, IntrNum, VirtIntrNum, HypIntrNum;\r
  UINT64                         FwCfgSelectorAddress;\r
  UINT64                         FwCfgSelectorSize;\r
  UINT64                         FwCfgDataAddress;\r
  UINT64                         FwCfgDataSize;\r
  UINT64                         FwCfgDmaAddress;\r
  UINT64                         FwCfgDmaSize;\r
  BOOLEAN                        HavePci;\r
\r
  Hob = GetFirstGuidHob(&gFdtHobGuid);\r
  if (Hob == NULL || GET_GUID_HOB_DATA_SIZE (Hob) != sizeof (UINT64)) {\r
    return EFI_NOT_FOUND;\r
  }\r
  DeviceTreeBase = (VOID *)(UINTN)*(UINT64 *)GET_GUID_HOB_DATA (Hob);\r
\r
  if (fdt_check_header (DeviceTreeBase) != 0) {\r
    DEBUG ((EFI_D_ERROR, "%a: No DTB found @ 0x%p\n", __FUNCTION__, DeviceTreeBase));\r
    return EFI_NOT_FOUND;\r
  }\r
\r
  DEBUG ((EFI_D_INFO, "%a: DTB @ 0x%p\n", __FUNCTION__, DeviceTreeBase));\r
\r
  RtcNode = -1;\r
  HavePci = FALSE;\r
  //\r
  // Now enumerate the nodes and install peripherals that we are interested in,\r
  // i.e., GIC, RTC and virtio MMIO nodes\r
  //\r
  for (Prev = 0;; Prev = Node) {\r
    Node = fdt_next_node (DeviceTreeBase, Prev, NULL);\r
    if (Node < 0) {\r
      break;\r
    }\r
\r
    Type = fdt_getprop (DeviceTreeBase, Node, "compatible", &Len);\r
    if (Type == NULL) {\r
      continue;\r
    }\r
\r
    PropType = GetTypeFromNode (Type, Len);\r
    if (PropType == PropertyTypeUnknown) {\r
      continue;\r
    }\r
\r
    //\r
    // Get the 'reg' property of this node. For now, we will assume\r
    // 8 byte quantities for base and size, respectively.\r
    // TODO use #cells root properties instead\r
    //\r
    RegProp = fdt_getprop (DeviceTreeBase, Node, "reg", &Len);\r
    ASSERT ((RegProp != NULL) || (PropType == PropertyTypeTimer));\r
\r
    switch (PropType) {\r
    case PropertyTypePciHost:\r
      ASSERT (Len == 2 * sizeof (UINT64));\r
      Status = ProcessPciHost (DeviceTreeBase, Node, RegProp);\r
      ASSERT_EFI_ERROR (Status);\r
      HavePci = TRUE;\r
      break;\r
\r
    case PropertyTypeFwCfg:\r
      ASSERT (Len == 2 * sizeof (UINT64));\r
\r
      FwCfgDataAddress     = fdt64_to_cpu (((UINT64 *)RegProp)[0]);\r
      FwCfgDataSize        = 8;\r
      FwCfgSelectorAddress = FwCfgDataAddress + FwCfgDataSize;\r
      FwCfgSelectorSize    = 2;\r
\r
      //\r
      // The following ASSERT()s express\r
      //\r
      //   Address + Size - 1 <= MAX_UINTN\r
      //\r
      // for both registers, that is, that the last byte in each MMIO range is\r
      // expressible as a MAX_UINTN. The form below is mathematically\r
      // equivalent, and it also prevents any unsigned overflow before the\r
      // comparison.\r
      //\r
      ASSERT (FwCfgSelectorAddress <= MAX_UINTN - FwCfgSelectorSize + 1);\r
      ASSERT (FwCfgDataAddress     <= MAX_UINTN - FwCfgDataSize     + 1);\r
\r
      PcdSet64 (PcdFwCfgSelectorAddress, FwCfgSelectorAddress);\r
      PcdSet64 (PcdFwCfgDataAddress,     FwCfgDataAddress);\r
\r
      DEBUG ((EFI_D_INFO, "Found FwCfg @ 0x%Lx/0x%Lx\n", FwCfgSelectorAddress,\r
        FwCfgDataAddress));\r
\r
      if (fdt64_to_cpu (((UINT64 *)RegProp)[1]) >= 0x18) {\r
        FwCfgDmaAddress = FwCfgDataAddress + 0x10;\r
        FwCfgDmaSize    = 0x08;\r
\r
        //\r
        // See explanation above.\r
        //\r
        ASSERT (FwCfgDmaAddress <= MAX_UINTN - FwCfgDmaSize + 1);\r
\r
        PcdSet64 (PcdFwCfgDmaAddress, FwCfgDmaAddress);\r
        DEBUG ((EFI_D_INFO, "Found FwCfg DMA @ 0x%Lx\n", FwCfgDmaAddress));\r
      }\r
      break;\r
\r
    case PropertyTypeVirtio:\r
      ASSERT (Len == 16);\r
      //\r
      // Create a unique device path for this transport on the fly\r
      //\r
      RegBase = fdt64_to_cpu (((UINT64 *)RegProp)[0]);\r
      DevicePath = (VIRTIO_TRANSPORT_DEVICE_PATH *)CreateDeviceNode (\r
                                    HARDWARE_DEVICE_PATH,\r
                                    HW_VENDOR_DP,\r
                                    sizeof (VIRTIO_TRANSPORT_DEVICE_PATH));\r
      if (DevicePath == NULL) {\r
        DEBUG ((EFI_D_ERROR, "%a: Out of memory\n", __FUNCTION__));\r
        break;\r
      }\r
\r
      CopyMem (&DevicePath->Vendor.Guid, &gVirtioMmioTransportGuid,\r
        sizeof (EFI_GUID));\r
      DevicePath->PhysBase = RegBase;\r
      SetDevicePathNodeLength (&DevicePath->Vendor,\r
                               sizeof (*DevicePath) - sizeof (DevicePath->End));\r
      SetDevicePathEndNode (&DevicePath->End);\r
\r
      Handle = NULL;\r
      Status = gBS->InstallProtocolInterface (&Handle,\r
                     &gEfiDevicePathProtocolGuid, EFI_NATIVE_INTERFACE,\r
                     DevicePath);\r
      if (EFI_ERROR (Status)) {\r
        DEBUG ((EFI_D_ERROR, "%a: Failed to install the EFI_DEVICE_PATH "\r
          "protocol on a new handle (Status == %r)\n",\r
          __FUNCTION__, Status));\r
        FreePool (DevicePath);\r
        break;\r
      }\r
\r
      Status = VirtioMmioInstallDevice (RegBase, Handle);\r
      if (EFI_ERROR (Status)) {\r
        DEBUG ((EFI_D_ERROR, "%a: Failed to install VirtIO transport @ 0x%Lx "\r
          "on handle %p (Status == %r)\n", __FUNCTION__, RegBase,\r
          Handle, Status));\r
\r
        Status = gBS->UninstallProtocolInterface (Handle,\r
                        &gEfiDevicePathProtocolGuid, DevicePath);\r
        ASSERT_EFI_ERROR (Status);\r
        FreePool (DevicePath);\r
      }\r
      break;\r
\r
    case PropertyTypeRtc:\r
      ASSERT (Len == 16);\r
\r
      RegBase = fdt64_to_cpu (((UINT64 *)RegProp)[0]);\r
      ASSERT (RegBase < MAX_UINT32);\r
\r
      PcdSet32 (PcdPL031RtcBase, (UINT32)RegBase);\r
\r
      DEBUG ((EFI_D_INFO, "Found PL031 RTC @ 0x%Lx\n", RegBase));\r
      RtcNode = Node;\r
      break;\r
\r
    case PropertyTypeTimer:\r
      //\r
      // - interrupts : Interrupt list for secure, non-secure, virtual and\r
      //  hypervisor timers, in that order.\r
      //\r
      InterruptProp = fdt_getprop (DeviceTreeBase, Node, "interrupts", &Len);\r
      ASSERT (Len == 36 || Len == 48);\r
\r
      SecIntrNum = fdt32_to_cpu (InterruptProp[0].Number)\r
                   + (InterruptProp[0].Type ? 16 : 0);\r
      IntrNum = fdt32_to_cpu (InterruptProp[1].Number)\r
                + (InterruptProp[1].Type ? 16 : 0);\r
      VirtIntrNum = fdt32_to_cpu (InterruptProp[2].Number)\r
                    + (InterruptProp[2].Type ? 16 : 0);\r
      HypIntrNum = Len < 48 ? 0 : fdt32_to_cpu (InterruptProp[3].Number)\r
                                  + (InterruptProp[3].Type ? 16 : 0);\r
\r
      DEBUG ((EFI_D_INFO, "Found Timer interrupts %d, %d, %d, %d\n",\r
        SecIntrNum, IntrNum, VirtIntrNum, HypIntrNum));\r
\r
      PcdSet32 (PcdArmArchTimerSecIntrNum, SecIntrNum);\r
      PcdSet32 (PcdArmArchTimerIntrNum, IntrNum);\r
      PcdSet32 (PcdArmArchTimerVirtIntrNum, VirtIntrNum);\r
      PcdSet32 (PcdArmArchTimerHypIntrNum, HypIntrNum);\r
      break;\r
\r
    case PropertyTypeXen:\r
      ASSERT (Len == 16);\r
\r
      //\r
      // Retrieve the reg base from this node and wire it up to the\r
      // MMIO flavor of the XenBus root device I/O protocol\r
      //\r
      RegBase = fdt64_to_cpu (((UINT64 *)RegProp)[0]);\r
      Handle = NULL;\r
      Status = XenIoMmioInstall (&Handle, RegBase);\r
      if (EFI_ERROR (Status)) {\r
        DEBUG ((EFI_D_ERROR, "%a: XenIoMmioInstall () failed on a new handle "\r
          "(Status == %r)\n", __FUNCTION__, Status));\r
        break;\r
      }\r
\r
      DEBUG ((EFI_D_INFO, "Found Xen node with Grant table @ 0x%Lx\n", RegBase));\r
\r
      break;\r
\r
    default:\r
      break;\r
    }\r
  }\r
\r
  if (!FeaturePcdGet (PcdPureAcpiBoot)) {\r
    //\r
    // Only install the FDT as a configuration table if we want to leave it up\r
    // to the OS to decide whether it prefers ACPI over DT.\r
    //\r
    Status = gBS->InstallConfigurationTable (&gFdtTableGuid, DeviceTreeBase);\r
    ASSERT_EFI_ERROR (Status);\r
\r
    //\r
    // UEFI takes ownership of the RTC hardware, and exposes its functionality\r
    // through the UEFI Runtime Services GetTime, SetTime, etc. This means we\r
    // need to disable it in the device tree to prevent the OS from attaching its\r
    // device driver as well.\r
    //\r
    if ((RtcNode != -1) &&\r
        fdt_setprop_string (DeviceTreeBase, RtcNode, "status",\r
          "disabled") != 0) {\r
      DEBUG ((EFI_D_WARN, "Failed to set PL031 status to 'disabled'\n"));\r
    }\r
\r
    if (HavePci) {\r
      //\r
      // Set the /chosen/linux,pci-probe-only property to 1, so that the PCI\r
      // setup we will perform in the firmware is honored by the Linux OS,\r
      // rather than torn down and done from scratch. This is generally a more\r
      // sensible approach, and aligns with what ACPI based OSes do in general.\r
      //\r
      // In case we are exposing an emulated VGA PCI device to the guest, which\r
      // may subsequently get exposed via the Graphics Output protocol and\r
      // driven as an efifb by Linux, we need this setting to prevent the\r
      // framebuffer from becoming unresponsive.\r
      //\r
      Node = fdt_path_offset (DeviceTreeBase, "/chosen");\r
      if (Node < 0) {\r
        Node = fdt_add_subnode (DeviceTreeBase, 0, "/chosen");\r
      }\r
      if (Node < 0 ||\r
          fdt_setprop_u32 (DeviceTreeBase, Node, "linux,pci-probe-only", 1) < 0) {\r
        DEBUG ((EFI_D_WARN, "Failed to set /chosen/linux,pci-probe-only property\n"));\r
      }\r
    }\r
  }\r
  return EFI_SUCCESS;\r
}\r
Commit	Line	Data
ad106932 AB	1	/** @file\r
	2	* Device tree enumeration DXE driver for ARM Virtual Machines\r
	3	*\r
	4	* Copyright (c) 2014, Linaro Ltd. All rights reserved.<BR>\r
	5	*\r
	6	* This program and the accompanying materials are\r
	7	* licensed and made available under the terms and conditions of the BSD License\r
	8	* which accompanies this distribution. The full text of the license may be found at\r
	9	* http://opensource.org/licenses/bsd-license.php\r
	10	*\r
	11	* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
	12	* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
	13	*\r
	14	**/\r
	15	\r
	16	#include <Library/BaseLib.h>\r
	17	#include <Library/DebugLib.h>\r
	18	#include <Library/UefiLib.h>\r
	19	#include <Library/BaseMemoryLib.h>\r
	20	#include <Library/UefiDriverEntryPoint.h>\r
	21	#include <Library/MemoryAllocationLib.h>\r
	22	#include <Library/UefiBootServicesTableLib.h>\r
	23	#include <Library/VirtioMmioDeviceLib.h>\r
	24	#include <Library/DevicePathLib.h>\r
	25	#include <Library/PcdLib.h>\r
	26	#include <Library/DxeServicesLib.h>\r
cc667df0	27	#include <Library/HobLib.h>\r
ad106932	28	#include <libfdt.h>\r
6abe83c3	29	#include <Library/XenIoMmioLib.h>\r
ad106932 AB	30	\r
ad106932 AB	31	#include <Guid/Fdt.h>\r
73bb8e68	32	#include <Guid/VirtioMmioTransport.h>\r
cc667df0	33	#include <Guid/FdtHob.h>\r
ad106932 AB	34	\r
	35	#pragma pack (1)\r
	36	typedef struct {\r
	37	VENDOR_DEVICE_PATH Vendor;\r
	38	UINT64 PhysBase;\r
	39	EFI_DEVICE_PATH_PROTOCOL End;\r
	40	} VIRTIO_TRANSPORT_DEVICE_PATH;\r
	41	#pragma pack ()\r
	42	\r
	43	typedef enum {\r
	44	PropertyTypeUnknown,\r
ad106932 AB	45	PropertyTypeRtc,\r
	46	PropertyTypeVirtio,\r
	47	PropertyTypeUart,\r
	48	PropertyTypeTimer,\r
ad652d46	49	PropertyTypeFwCfg,\r
65bb13b0	50	PropertyTypePciHost,\r
6abe83c3	51	PropertyTypeXen,\r
ad106932 AB	52	} PROPERTY_TYPE;\r
	53	\r
	54	typedef struct {\r
	55	PROPERTY_TYPE Type;\r
65bb13b0	56	CHAR8 Compatible[32];\r
ad106932 AB	57	} PROPERTY;\r
	58	\r
	59	STATIC CONST PROPERTY CompatibleProperties[] = {\r
65bb13b0 LE	60	{ PropertyTypeRtc, "arm,pl031" },\r
	61	{ PropertyTypeVirtio, "virtio,mmio" },\r
	62	{ PropertyTypeUart, "arm,pl011" },\r
	63	{ PropertyTypeTimer, "arm,armv7-timer" },\r
	64	{ PropertyTypeTimer, "arm,armv8-timer" },\r
65bb13b0 LE	65	{ PropertyTypeFwCfg, "qemu,fw-cfg-mmio" },\r
65bb13b0 LE	66	{ PropertyTypePciHost, "pci-host-ecam-generic" },\r
6abe83c3	67	{ PropertyTypeXen, "xen,xen" },\r
65bb13b0	68	{ PropertyTypeUnknown, "" }\r
ad106932 AB	69	};\r
	70	\r
	71	typedef struct {\r
	72	UINT32 Type;\r
	73	UINT32 Number;\r
	74	UINT32 Flags;\r
	75	} INTERRUPT_PROPERTY;\r
	76	\r
	77	STATIC\r
	78	PROPERTY_TYPE\r
	79	GetTypeFromNode (\r
	80	IN CONST CHAR8 *NodeType,\r
	81	IN UINTN Size\r
	82	)\r
	83	{\r
	84	CONST CHAR8 *Compatible;\r
	85	CONST PROPERTY *CompatibleProperty;\r
	86	\r
	87	//\r
	88	// A 'compatible' node may contain a sequence of NULL terminated\r
	89	// compatible strings so check each one\r
	90	//\r
	91	for (Compatible = NodeType; Compatible < NodeType + Size && *Compatible;\r
	92	Compatible += 1 + AsciiStrLen (Compatible)) {\r
	93	for (CompatibleProperty = CompatibleProperties; CompatibleProperty->Compatible[0]; CompatibleProperty++) {\r
	94	if (AsciiStrCmp (CompatibleProperty->Compatible, Compatible) == 0) {\r
	95	return CompatibleProperty->Type;\r
	96	}\r
	97	}\r
	98	}\r
	99	return PropertyTypeUnknown;\r
	100	}\r
	101	\r
65bb13b0 LE	102	//\r
	103	// We expect the "ranges" property of "pci-host-ecam-generic" to consist of\r
	104	// records like this.\r
	105	//\r
	106	#pragma pack (1)\r
	107	typedef struct {\r
	108	UINT32 Type;\r
	109	UINT64 ChildBase;\r
	110	UINT64 CpuBase;\r
	111	UINT64 Size;\r
	112	} DTB_PCI_HOST_RANGE_RECORD;\r
	113	#pragma pack ()\r
	114	\r
	115	#define DTB_PCI_HOST_RANGE_RELOCATABLE BIT31\r
	116	#define DTB_PCI_HOST_RANGE_PREFETCHABLE BIT30\r
	117	#define DTB_PCI_HOST_RANGE_ALIASED BIT29\r
	118	#define DTB_PCI_HOST_RANGE_MMIO32 BIT25\r
	119	#define DTB_PCI_HOST_RANGE_MMIO64 (BIT25 \| BIT24)\r
	120	#define DTB_PCI_HOST_RANGE_IO BIT24\r
	121	#define DTB_PCI_HOST_RANGE_TYPEMASK (BIT31 \| BIT30 \| BIT29 \| BIT25 \| BIT24)\r
	122	\r
	123	/**\r
	124	Process the device tree node describing the generic PCI host controller.\r
	125	\r
	126	param[in] DeviceTreeBase Pointer to the device tree.\r
	127	\r
	128	param[in] Node Offset of the device tree node whose "compatible"\r
	129	property is "pci-host-ecam-generic".\r
	130	\r
	131	param[in] RegProp Pointer to the "reg" property of Node. The caller\r
	132	is responsible for ensuring that the size of the\r
	133	property is 4 UINT32 cells.\r
	134	\r
	135	@retval EFI_SUCCESS Parsing successful, properties parsed from Node\r
	136	have been stored in dynamic PCDs.\r
	137	\r
	138	@retval EFI_PROTOCOL_ERROR Parsing failed. PCDs are left unchanged.\r
	139	**/\r
	140	STATIC\r
	141	EFI_STATUS\r
	142	EFIAPI\r
	143	ProcessPciHost (\r
	144	IN CONST VOID *DeviceTreeBase,\r
	145	IN INT32 Node,\r
	146	IN CONST VOID *RegProp\r
	147	)\r
	148	{\r
	149	UINT64 ConfigBase, ConfigSize;\r
	150	CONST VOID *Prop;\r
	151	INT32 Len;\r
	152	UINT32 BusMin, BusMax;\r
	153	UINT32 RecordIdx;\r
	154	UINT64 IoBase, IoSize, IoTranslation;\r
	155	UINT64 MmioBase, MmioSize, MmioTranslation;\r
	156	\r
	157	//\r
	158	// Fetch the ECAM window.\r
	159	//\r
	160	ConfigBase = fdt64_to_cpu (((CONST UINT64 *)RegProp)[0]);\r
	161	ConfigSize = fdt64_to_cpu (((CONST UINT64 *)RegProp)[1]);\r
	162	\r
	163	//\r
	164	// Fetch the bus range (note: inclusive).\r
	165	//\r
166	Prop = fdt_getprop (DeviceTreeBase, Node, "bus-range", &Len);\r
167	if (Prop == NULL \|\| Len != 2 * sizeof(UINT32)) {\r
168	DEBUG ((EFI_D_ERROR, "%a: 'bus-range' not found or invalid\n",\r
169	__FUNCTION__));\r
170	return EFI_PROTOCOL_ERROR;\r
171	}\r
172	BusMin = fdt32_to_cpu (((CONST UINT32 *)Prop)[0]);\r
173	BusMax = fdt32_to_cpu (((CONST UINT32 *)Prop)[1]);\r
174	\r
175	//\r
176	// Sanity check: the config space must accommodate all 4K register bytes of\r
177	// all 8 functions of all 32 devices of all buses.\r
178	//\r
179	if (BusMax < BusMin \|\| BusMax - BusMin == MAX_UINT32 \|\|\r
180	DivU64x32 (ConfigSize, SIZE_4KB * 8 * 32) < BusMax - BusMin + 1) {\r
181	DEBUG ((EFI_D_ERROR, "%a: invalid 'bus-range' and/or 'reg'\n",\r
182	__FUNCTION__));\r
183	return EFI_PROTOCOL_ERROR;\r
184	}\r
185	\r
186	//\r
187	// Iterate over "ranges".\r
188	//\r
189	Prop = fdt_getprop (DeviceTreeBase, Node, "ranges", &Len);\r
190	if (Prop == NULL \|\| Len == 0 \|\|\r
191	Len % sizeof (DTB_PCI_HOST_RANGE_RECORD) != 0) {\r
192	DEBUG ((EFI_D_ERROR, "%a: 'ranges' not found or invalid\n", __FUNCTION__));\r
193	return EFI_PROTOCOL_ERROR;\r
194	}\r
195	\r
196	//\r
197	// IoBase, IoTranslation, MmioBase and MmioTranslation are initialized only\r
198	// in order to suppress '-Werror=maybe-uninitialized' warnings incorrectly\r
199	// emitted by some gcc versions.\r
200	//\r
201	IoBase = 0;\r
202	IoTranslation = 0;\r
203	MmioBase = 0;\r
204	MmioTranslation = 0;\r
205	\r
206	//\r
207	// IoSize and MmioSize are initialized to zero because the logic below\r
208	// requires it.\r
209	//\r
210	IoSize = 0;\r
211	MmioSize = 0;\r
212	for (RecordIdx = 0; RecordIdx < Len / sizeof (DTB_PCI_HOST_RANGE_RECORD);\r
213	++RecordIdx) {\r
214	CONST DTB_PCI_HOST_RANGE_RECORD *Record;\r
215	\r
216	Record = (CONST DTB_PCI_HOST_RANGE_RECORD *)Prop + RecordIdx;\r
217	switch (fdt32_to_cpu (Record->Type) & DTB_PCI_HOST_RANGE_TYPEMASK) {\r
218	case DTB_PCI_HOST_RANGE_IO:\r
219	IoBase = fdt64_to_cpu (Record->ChildBase);\r
220	IoSize = fdt64_to_cpu (Record->Size);\r
221	IoTranslation = fdt64_to_cpu (Record->CpuBase) - IoBase;\r
222	break;\r
223	\r
224	case DTB_PCI_HOST_RANGE_MMIO32:\r
225	MmioBase = fdt64_to_cpu (Record->ChildBase);\r
226	MmioSize = fdt64_to_cpu (Record->Size);\r
227	MmioTranslation = fdt64_to_cpu (Record->CpuBase) - MmioBase;\r
228	\r
229	if (MmioBase > MAX_UINT32 \|\| MmioSize > MAX_UINT32 \|\|\r
230	MmioBase + MmioSize > SIZE_4GB) {\r
231	DEBUG ((EFI_D_ERROR, "%a: MMIO32 space invalid\n", __FUNCTION__));\r
232	return EFI_PROTOCOL_ERROR;\r
233	}\r
234	\r
235	if (MmioTranslation != 0) {\r
236	DEBUG ((EFI_D_ERROR, "%a: unsupported nonzero MMIO32 translation "\r
237	"0x%Lx\n", __FUNCTION__, MmioTranslation));\r
238	return EFI_UNSUPPORTED;\r
239	}\r
240	\r
241	break;\r
242	}\r
243	}\r
244	if (IoSize == 0 \|\| MmioSize == 0) {\r
245	DEBUG ((EFI_D_ERROR, "%a: %a space empty\n", __FUNCTION__,\r
246	(IoSize == 0) ? "IO" : "MMIO32"));\r
247	return EFI_PROTOCOL_ERROR;\r
248	}\r
249	\r
250	PcdSet64 (PcdPciExpressBaseAddress, ConfigBase);\r
251	\r
252	PcdSet32 (PcdPciBusMin, BusMin);\r
253	PcdSet32 (PcdPciBusMax, BusMax);\r
254	\r
255	PcdSet64 (PcdPciIoBase, IoBase);\r
256	PcdSet64 (PcdPciIoSize, IoSize);\r
257	PcdSet64 (PcdPciIoTranslation, IoTranslation);\r
258	\r
259	PcdSet32 (PcdPciMmio32Base, (UINT32)MmioBase);\r
260	PcdSet32 (PcdPciMmio32Size, (UINT32)MmioSize);\r
261	\r
262	PcdSetBool (PcdPciDisableBusEnumeration, FALSE);\r
263	\r
264	DEBUG ((EFI_D_INFO, "%a: Config[0x%Lx+0x%Lx) Bus[0x%x..0x%x] "\r
265	"Io[0x%Lx+0x%Lx)@0x%Lx Mem[0x%Lx+0x%Lx)@0x%Lx\n", __FUNCTION__, ConfigBase,\r
266	ConfigSize, BusMin, BusMax, IoBase, IoSize, IoTranslation, MmioBase,\r
267	MmioSize, MmioTranslation));\r
268	return EFI_SUCCESS;\r
269	}\r
270	\r
271	\r
ad106932 AB	272	EFI_STATUS\r
	273	EFIAPI\r
	274	InitializeVirtFdtDxe (\r
	275	IN EFI_HANDLE ImageHandle,\r
	276	IN EFI_SYSTEM_TABLE *SystemTable\r
	277	)\r
	278	{\r
cc667df0	279	VOID *Hob;\r
ad106932 AB	280	VOID *DeviceTreeBase;\r
	281	INT32 Node, Prev;\r
	282	INT32 RtcNode;\r
	283	EFI_STATUS Status;\r
	284	CONST CHAR8 *Type;\r
	285	INT32 Len;\r
	286	PROPERTY_TYPE PropType;\r
	287	CONST VOID *RegProp;\r
	288	VIRTIO_TRANSPORT_DEVICE_PATH *DevicePath;\r
	289	EFI_HANDLE Handle;\r
	290	UINT64 RegBase;\r
ad106932 AB	291	CONST INTERRUPT_PROPERTY *InterruptProp;\r
ad106932 AB	292	INT32 SecIntrNum, IntrNum, VirtIntrNum, HypIntrNum;\r
ad652d46 LE	293	UINT64 FwCfgSelectorAddress;\r
	294	UINT64 FwCfgSelectorSize;\r
	295	UINT64 FwCfgDataAddress;\r
	296	UINT64 FwCfgDataSize;\r
50b91449 LE	297	UINT64 FwCfgDmaAddress;\r
50b91449 LE	298	UINT64 FwCfgDmaSize;\r
8b816c62	299	BOOLEAN HavePci;\r
ad106932	300	\r
cc667df0 AB	301	Hob = GetFirstGuidHob(&gFdtHobGuid);\r
	302	if (Hob == NULL \|\| GET_GUID_HOB_DATA_SIZE (Hob) != sizeof (UINT64)) {\r
	303	return EFI_NOT_FOUND;\r
	304	}\r
	305	DeviceTreeBase = (VOID )(UINTN)(UINT64 *)GET_GUID_HOB_DATA (Hob);\r
ad106932 AB	306	\r
	307	if (fdt_check_header (DeviceTreeBase) != 0) {\r
	308	DEBUG ((EFI_D_ERROR, "%a: No DTB found @ 0x%p\n", __FUNCTION__, DeviceTreeBase));\r
	309	return EFI_NOT_FOUND;\r
	310	}\r
	311	\r
ad106932 AB	312	DEBUG ((EFI_D_INFO, "%a: DTB @ 0x%p\n", __FUNCTION__, DeviceTreeBase));\r
	313	\r
	314	RtcNode = -1;\r
8b816c62	315	HavePci = FALSE;\r
ad106932 AB	316	//\r
	317	// Now enumerate the nodes and install peripherals that we are interested in,\r
	318	// i.e., GIC, RTC and virtio MMIO nodes\r
	319	//\r
	320	for (Prev = 0;; Prev = Node) {\r
	321	Node = fdt_next_node (DeviceTreeBase, Prev, NULL);\r
	322	if (Node < 0) {\r
	323	break;\r
	324	}\r
	325	\r
	326	Type = fdt_getprop (DeviceTreeBase, Node, "compatible", &Len);\r
	327	if (Type == NULL) {\r
	328	continue;\r
	329	}\r
	330	\r
	331	PropType = GetTypeFromNode (Type, Len);\r
	332	if (PropType == PropertyTypeUnknown) {\r
	333	continue;\r
	334	}\r
	335	\r
	336	//\r
	337	// Get the 'reg' property of this node. For now, we will assume\r
	338	// 8 byte quantities for base and size, respectively.\r
	339	// TODO use #cells root properties instead\r
	340	//\r
	341	RegProp = fdt_getprop (DeviceTreeBase, Node, "reg", &Len);\r
a372110b	342	ASSERT ((RegProp != NULL) \|\| (PropType == PropertyTypeTimer));\r
ad106932 AB	343	\r
ad106932 AB	344	switch (PropType) {\r
65bb13b0 LE	345	case PropertyTypePciHost:\r
	346	ASSERT (Len == 2 * sizeof (UINT64));\r
	347	Status = ProcessPciHost (DeviceTreeBase, Node, RegProp);\r
	348	ASSERT_EFI_ERROR (Status);\r
8b816c62	349	HavePci = TRUE;\r
65bb13b0 LE	350	break;\r
65bb13b0 LE	351	\r
ad652d46 LE	352	case PropertyTypeFwCfg:\r
	353	ASSERT (Len == 2 * sizeof (UINT64));\r
	354	\r
	355	FwCfgDataAddress = fdt64_to_cpu (((UINT64 *)RegProp)[0]);\r
	356	FwCfgDataSize = 8;\r
	357	FwCfgSelectorAddress = FwCfgDataAddress + FwCfgDataSize;\r
	358	FwCfgSelectorSize = 2;\r
	359	\r
	360	//\r
	361	// The following ASSERT()s express\r
	362	//\r
	363	// Address + Size - 1 <= MAX_UINTN\r
	364	//\r
	365	// for both registers, that is, that the last byte in each MMIO range is\r
	366	// expressible as a MAX_UINTN. The form below is mathematically\r
	367	// equivalent, and it also prevents any unsigned overflow before the\r
	368	// comparison.\r
	369	//\r
	370	ASSERT (FwCfgSelectorAddress <= MAX_UINTN - FwCfgSelectorSize + 1);\r
	371	ASSERT (FwCfgDataAddress <= MAX_UINTN - FwCfgDataSize + 1);\r
	372	\r
	373	PcdSet64 (PcdFwCfgSelectorAddress, FwCfgSelectorAddress);\r
	374	PcdSet64 (PcdFwCfgDataAddress, FwCfgDataAddress);\r
	375	\r
	376	DEBUG ((EFI_D_INFO, "Found FwCfg @ 0x%Lx/0x%Lx\n", FwCfgSelectorAddress,\r
	377	FwCfgDataAddress));\r
50b91449 LE	378	\r
	379	if (fdt64_to_cpu (((UINT64 *)RegProp)[1]) >= 0x18) {\r
	380	FwCfgDmaAddress = FwCfgDataAddress + 0x10;\r
	381	FwCfgDmaSize = 0x08;\r
	382	\r
	383	//\r
	384	// See explanation above.\r
	385	//\r
	386	ASSERT (FwCfgDmaAddress <= MAX_UINTN - FwCfgDmaSize + 1);\r
	387	\r
	388	PcdSet64 (PcdFwCfgDmaAddress, FwCfgDmaAddress);\r
	389	DEBUG ((EFI_D_INFO, "Found FwCfg DMA @ 0x%Lx\n", FwCfgDmaAddress));\r
	390	}\r
ad652d46 LE	391	break;\r
ad652d46 LE	392	\r
ad106932 AB	393	case PropertyTypeVirtio:\r
	394	ASSERT (Len == 16);\r
	395	//\r
	396	// Create a unique device path for this transport on the fly\r
	397	//\r
	398	RegBase = fdt64_to_cpu (((UINT64 *)RegProp)[0]);\r
	399	DevicePath = (VIRTIO_TRANSPORT_DEVICE_PATH *)CreateDeviceNode (\r
	400	HARDWARE_DEVICE_PATH,\r
	401	HW_VENDOR_DP,\r
	402	sizeof (VIRTIO_TRANSPORT_DEVICE_PATH));\r
	403	if (DevicePath == NULL) {\r
	404	DEBUG ((EFI_D_ERROR, "%a: Out of memory\n", __FUNCTION__));\r
	405	break;\r
	406	}\r
	407	\r
73bb8e68 LE	408	CopyMem (&DevicePath->Vendor.Guid, &gVirtioMmioTransportGuid,\r
73bb8e68 LE	409	sizeof (EFI_GUID));\r
ad106932 AB	410	DevicePath->PhysBase = RegBase;\r
	411	SetDevicePathNodeLength (&DevicePath->Vendor,\r
	412	sizeof (*DevicePath) - sizeof (DevicePath->End));\r
	413	SetDevicePathEndNode (&DevicePath->End);\r
	414	\r
	415	Handle = NULL;\r
	416	Status = gBS->InstallProtocolInterface (&Handle,\r
	417	&gEfiDevicePathProtocolGuid, EFI_NATIVE_INTERFACE,\r
	418	DevicePath);\r
	419	if (EFI_ERROR (Status)) {\r
	420	DEBUG ((EFI_D_ERROR, "%a: Failed to install the EFI_DEVICE_PATH "\r
	421	"protocol on a new handle (Status == %r)\n",\r
	422	__FUNCTION__, Status));\r
	423	FreePool (DevicePath);\r
	424	break;\r
	425	}\r
	426	\r
	427	Status = VirtioMmioInstallDevice (RegBase, Handle);\r
	428	if (EFI_ERROR (Status)) {\r
	429	DEBUG ((EFI_D_ERROR, "%a: Failed to install VirtIO transport @ 0x%Lx "\r
	430	"on handle %p (Status == %r)\n", __FUNCTION__, RegBase,\r
	431	Handle, Status));\r
	432	\r
	433	Status = gBS->UninstallProtocolInterface (Handle,\r
	434	&gEfiDevicePathProtocolGuid, DevicePath);\r
	435	ASSERT_EFI_ERROR (Status);\r
	436	FreePool (DevicePath);\r
	437	}\r
	438	break;\r
	439	\r
ad106932 AB	440	case PropertyTypeRtc:\r
	441	ASSERT (Len == 16);\r
	442	\r
	443	RegBase = fdt64_to_cpu (((UINT64 *)RegProp)[0]);\r
	444	ASSERT (RegBase < MAX_UINT32);\r
	445	\r
	446	PcdSet32 (PcdPL031RtcBase, (UINT32)RegBase);\r
	447	\r
	448	DEBUG ((EFI_D_INFO, "Found PL031 RTC @ 0x%Lx\n", RegBase));\r
	449	RtcNode = Node;\r
	450	break;\r
	451	\r
	452	case PropertyTypeTimer:\r
	453	//\r
	454	// - interrupts : Interrupt list for secure, non-secure, virtual and\r
	455	// hypervisor timers, in that order.\r
	456	//\r
	457	InterruptProp = fdt_getprop (DeviceTreeBase, Node, "interrupts", &Len);\r
967efdcd	458	ASSERT (Len == 36 \|\| Len == 48);\r
ad106932 AB	459	\r
	460	SecIntrNum = fdt32_to_cpu (InterruptProp[0].Number)\r
	461	+ (InterruptProp[0].Type ? 16 : 0);\r
	462	IntrNum = fdt32_to_cpu (InterruptProp[1].Number)\r
	463	+ (InterruptProp[1].Type ? 16 : 0);\r
	464	VirtIntrNum = fdt32_to_cpu (InterruptProp[2].Number)\r
	465	+ (InterruptProp[2].Type ? 16 : 0);\r
967efdcd AB	466	HypIntrNum = Len < 48 ? 0 : fdt32_to_cpu (InterruptProp[3].Number)\r
967efdcd AB	467	+ (InterruptProp[3].Type ? 16 : 0);\r
ad106932 AB	468	\r
	469	DEBUG ((EFI_D_INFO, "Found Timer interrupts %d, %d, %d, %d\n",\r
	470	SecIntrNum, IntrNum, VirtIntrNum, HypIntrNum));\r
	471	\r
	472	PcdSet32 (PcdArmArchTimerSecIntrNum, SecIntrNum);\r
	473	PcdSet32 (PcdArmArchTimerIntrNum, IntrNum);\r
	474	PcdSet32 (PcdArmArchTimerVirtIntrNum, VirtIntrNum);\r
	475	PcdSet32 (PcdArmArchTimerHypIntrNum, HypIntrNum);\r
	476	break;\r
	477	\r
6abe83c3 AB	478	case PropertyTypeXen:\r
	479	ASSERT (Len == 16);\r
	480	\r
	481	//\r
	482	// Retrieve the reg base from this node and wire it up to the\r
	483	// MMIO flavor of the XenBus root device I/O protocol\r
	484	//\r
	485	RegBase = fdt64_to_cpu (((UINT64 *)RegProp)[0]);\r
	486	Handle = NULL;\r
	487	Status = XenIoMmioInstall (&Handle, RegBase);\r
	488	if (EFI_ERROR (Status)) {\r
	489	DEBUG ((EFI_D_ERROR, "%a: XenIoMmioInstall () failed on a new handle "\r
	490	"(Status == %r)\n", __FUNCTION__, Status));\r
	491	break;\r
	492	}\r
	493	\r
	494	DEBUG ((EFI_D_INFO, "Found Xen node with Grant table @ 0x%Lx\n", RegBase));\r
	495	\r
	496	break;\r
	497	\r
ad106932 AB	498	default:\r
	499	break;\r
	500	}\r
	501	}\r
	502	\r
7a63d291 AB	503	if (!FeaturePcdGet (PcdPureAcpiBoot)) {\r
	504	//\r
	505	// Only install the FDT as a configuration table if we want to leave it up\r
	506	// to the OS to decide whether it prefers ACPI over DT.\r
8b816c62	507	//\r
7a63d291 AB	508	Status = gBS->InstallConfigurationTable (&gFdtTableGuid, DeviceTreeBase);\r
	509	ASSERT_EFI_ERROR (Status);\r
	510	\r
8b816c62	511	//\r
7a63d291 AB	512	// UEFI takes ownership of the RTC hardware, and exposes its functionality\r
	513	// through the UEFI Runtime Services GetTime, SetTime, etc. This means we\r
	514	// need to disable it in the device tree to prevent the OS from attaching its\r
	515	// device driver as well.\r
8b816c62	516	//\r
7a63d291 AB	517	if ((RtcNode != -1) &&\r
	518	fdt_setprop_string (DeviceTreeBase, RtcNode, "status",\r
	519	"disabled") != 0) {\r
	520	DEBUG ((EFI_D_WARN, "Failed to set PL031 status to 'disabled'\n"));\r
8b816c62	521	}\r
7a63d291 AB	522	\r
	523	if (HavePci) {\r
	524	//\r
	525	// Set the /chosen/linux,pci-probe-only property to 1, so that the PCI\r
	526	// setup we will perform in the firmware is honored by the Linux OS,\r
	527	// rather than torn down and done from scratch. This is generally a more\r
	528	// sensible approach, and aligns with what ACPI based OSes do in general.\r
	529	//\r
	530	// In case we are exposing an emulated VGA PCI device to the guest, which\r
	531	// may subsequently get exposed via the Graphics Output protocol and\r
	532	// driven as an efifb by Linux, we need this setting to prevent the\r
	533	// framebuffer from becoming unresponsive.\r
	534	//\r
	535	Node = fdt_path_offset (DeviceTreeBase, "/chosen");\r
	536	if (Node < 0) {\r
	537	Node = fdt_add_subnode (DeviceTreeBase, 0, "/chosen");\r
	538	}\r
	539	if (Node < 0 \|\|\r
	540	fdt_setprop_u32 (DeviceTreeBase, Node, "linux,pci-probe-only", 1) < 0) {\r
	541	DEBUG ((EFI_D_WARN, "Failed to set /chosen/linux,pci-probe-only property\n"));\r
	542	}\r
8b816c62 AB	543	}\r
8b816c62 AB	544	}\r
ad106932 AB	545	return EFI_SUCCESS;\r
ad106932 AB	546	}\r