[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
  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
  { PropertyTypeFwCfg,   "qemu,fw-cfg-mmio"      },\r
  { PropertyTypePciHost, "pci-host-ecam-generic" },\r
  { PropertyTypeXen,     "xen,xen"               },\r
  { PropertyTypeUnknown, ""                      }\r
};\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
  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);\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 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
ad652d46	48	PropertyTypeFwCfg,\r
65bb13b0	49	PropertyTypePciHost,\r
6abe83c3	50	PropertyTypeXen,\r
ad106932 AB	51	} PROPERTY_TYPE;\r
	52	\r
	53	typedef struct {\r
	54	PROPERTY_TYPE Type;\r
65bb13b0	55	CHAR8 Compatible[32];\r
ad106932 AB	56	} PROPERTY;\r
	57	\r
	58	STATIC CONST PROPERTY CompatibleProperties[] = {\r
65bb13b0 LE	59	{ PropertyTypeRtc, "arm,pl031" },\r
	60	{ PropertyTypeVirtio, "virtio,mmio" },\r
	61	{ PropertyTypeUart, "arm,pl011" },\r
65bb13b0 LE	62	{ PropertyTypeFwCfg, "qemu,fw-cfg-mmio" },\r
65bb13b0 LE	63	{ PropertyTypePciHost, "pci-host-ecam-generic" },\r
6abe83c3	64	{ PropertyTypeXen, "xen,xen" },\r
65bb13b0	65	{ PropertyTypeUnknown, "" }\r
ad106932 AB	66	};\r
ad106932 AB	67	\r
ad106932 AB	68	STATIC\r
	69	PROPERTY_TYPE\r
	70	GetTypeFromNode (\r
	71	IN CONST CHAR8 *NodeType,\r
	72	IN UINTN Size\r
	73	)\r
	74	{\r
	75	CONST CHAR8 *Compatible;\r
	76	CONST PROPERTY *CompatibleProperty;\r
	77	\r
	78	//\r
	79	// A 'compatible' node may contain a sequence of NULL terminated\r
	80	// compatible strings so check each one\r
	81	//\r
	82	for (Compatible = NodeType; Compatible < NodeType + Size && *Compatible;\r
	83	Compatible += 1 + AsciiStrLen (Compatible)) {\r
	84	for (CompatibleProperty = CompatibleProperties; CompatibleProperty->Compatible[0]; CompatibleProperty++) {\r
	85	if (AsciiStrCmp (CompatibleProperty->Compatible, Compatible) == 0) {\r
	86	return CompatibleProperty->Type;\r
	87	}\r
	88	}\r
	89	}\r
	90	return PropertyTypeUnknown;\r
	91	}\r
	92	\r
65bb13b0 LE	93	//\r
	94	// We expect the "ranges" property of "pci-host-ecam-generic" to consist of\r
	95	// records like this.\r
	96	//\r
	97	#pragma pack (1)\r
	98	typedef struct {\r
	99	UINT32 Type;\r
	100	UINT64 ChildBase;\r
	101	UINT64 CpuBase;\r
	102	UINT64 Size;\r
	103	} DTB_PCI_HOST_RANGE_RECORD;\r
	104	#pragma pack ()\r
	105	\r
	106	#define DTB_PCI_HOST_RANGE_RELOCATABLE BIT31\r
	107	#define DTB_PCI_HOST_RANGE_PREFETCHABLE BIT30\r
	108	#define DTB_PCI_HOST_RANGE_ALIASED BIT29\r
	109	#define DTB_PCI_HOST_RANGE_MMIO32 BIT25\r
	110	#define DTB_PCI_HOST_RANGE_MMIO64 (BIT25 \| BIT24)\r
	111	#define DTB_PCI_HOST_RANGE_IO BIT24\r
	112	#define DTB_PCI_HOST_RANGE_TYPEMASK (BIT31 \| BIT30 \| BIT29 \| BIT25 \| BIT24)\r
	113	\r
	114	/**\r
	115	Process the device tree node describing the generic PCI host controller.\r
	116	\r
	117	param[in] DeviceTreeBase Pointer to the device tree.\r
	118	\r
	119	param[in] Node Offset of the device tree node whose "compatible"\r
	120	property is "pci-host-ecam-generic".\r
	121	\r
	122	param[in] RegProp Pointer to the "reg" property of Node. The caller\r
	123	is responsible for ensuring that the size of the\r
	124	property is 4 UINT32 cells.\r
	125	\r
	126	@retval EFI_SUCCESS Parsing successful, properties parsed from Node\r
	127	have been stored in dynamic PCDs.\r
	128	\r
	129	@retval EFI_PROTOCOL_ERROR Parsing failed. PCDs are left unchanged.\r
	130	**/\r
	131	STATIC\r
	132	EFI_STATUS\r
	133	EFIAPI\r
	134	ProcessPciHost (\r
	135	IN CONST VOID *DeviceTreeBase,\r
	136	IN INT32 Node,\r
	137	IN CONST VOID *RegProp\r
	138	)\r
	139	{\r
	140	UINT64 ConfigBase, ConfigSize;\r
	141	CONST VOID *Prop;\r
	142	INT32 Len;\r
	143	UINT32 BusMin, BusMax;\r
	144	UINT32 RecordIdx;\r
	145	UINT64 IoBase, IoSize, IoTranslation;\r
	146	UINT64 MmioBase, MmioSize, MmioTranslation;\r
	147	\r
	148	//\r
	149	// Fetch the ECAM window.\r
	150	//\r
	151	ConfigBase = fdt64_to_cpu (((CONST UINT64 *)RegProp)[0]);\r
	152	ConfigSize = fdt64_to_cpu (((CONST UINT64 *)RegProp)[1]);\r
	153	\r
	154	//\r
	155	// Fetch the bus range (note: inclusive).\r
	156	//\r
157	Prop = fdt_getprop (DeviceTreeBase, Node, "bus-range", &Len);\r
158	if (Prop == NULL \|\| Len != 2 * sizeof(UINT32)) {\r
159	DEBUG ((EFI_D_ERROR, "%a: 'bus-range' not found or invalid\n",\r
160	__FUNCTION__));\r
161	return EFI_PROTOCOL_ERROR;\r
162	}\r
163	BusMin = fdt32_to_cpu (((CONST UINT32 *)Prop)[0]);\r
164	BusMax = fdt32_to_cpu (((CONST UINT32 *)Prop)[1]);\r
165	\r
166	//\r
167	// Sanity check: the config space must accommodate all 4K register bytes of\r
168	// all 8 functions of all 32 devices of all buses.\r
169	//\r
170	if (BusMax < BusMin \|\| BusMax - BusMin == MAX_UINT32 \|\|\r
171	DivU64x32 (ConfigSize, SIZE_4KB * 8 * 32) < BusMax - BusMin + 1) {\r
172	DEBUG ((EFI_D_ERROR, "%a: invalid 'bus-range' and/or 'reg'\n",\r
173	__FUNCTION__));\r
174	return EFI_PROTOCOL_ERROR;\r
175	}\r
176	\r
177	//\r
178	// Iterate over "ranges".\r
179	//\r
180	Prop = fdt_getprop (DeviceTreeBase, Node, "ranges", &Len);\r
181	if (Prop == NULL \|\| Len == 0 \|\|\r
182	Len % sizeof (DTB_PCI_HOST_RANGE_RECORD) != 0) {\r
183	DEBUG ((EFI_D_ERROR, "%a: 'ranges' not found or invalid\n", __FUNCTION__));\r
184	return EFI_PROTOCOL_ERROR;\r
185	}\r
186	\r
187	//\r
188	// IoBase, IoTranslation, MmioBase and MmioTranslation are initialized only\r
189	// in order to suppress '-Werror=maybe-uninitialized' warnings incorrectly\r
190	// emitted by some gcc versions.\r
191	//\r
192	IoBase = 0;\r
193	IoTranslation = 0;\r
194	MmioBase = 0;\r
195	MmioTranslation = 0;\r
196	\r
197	//\r
198	// IoSize and MmioSize are initialized to zero because the logic below\r
199	// requires it.\r
200	//\r
201	IoSize = 0;\r
202	MmioSize = 0;\r
203	for (RecordIdx = 0; RecordIdx < Len / sizeof (DTB_PCI_HOST_RANGE_RECORD);\r
204	++RecordIdx) {\r
205	CONST DTB_PCI_HOST_RANGE_RECORD *Record;\r
206	\r
207	Record = (CONST DTB_PCI_HOST_RANGE_RECORD *)Prop + RecordIdx;\r
208	switch (fdt32_to_cpu (Record->Type) & DTB_PCI_HOST_RANGE_TYPEMASK) {\r
209	case DTB_PCI_HOST_RANGE_IO:\r
210	IoBase = fdt64_to_cpu (Record->ChildBase);\r
211	IoSize = fdt64_to_cpu (Record->Size);\r
212	IoTranslation = fdt64_to_cpu (Record->CpuBase) - IoBase;\r
213	break;\r
214	\r
215	case DTB_PCI_HOST_RANGE_MMIO32:\r
216	MmioBase = fdt64_to_cpu (Record->ChildBase);\r
217	MmioSize = fdt64_to_cpu (Record->Size);\r
218	MmioTranslation = fdt64_to_cpu (Record->CpuBase) - MmioBase;\r
219	\r
220	if (MmioBase > MAX_UINT32 \|\| MmioSize > MAX_UINT32 \|\|\r
221	MmioBase + MmioSize > SIZE_4GB) {\r
222	DEBUG ((EFI_D_ERROR, "%a: MMIO32 space invalid\n", __FUNCTION__));\r
223	return EFI_PROTOCOL_ERROR;\r
224	}\r
225	\r
226	if (MmioTranslation != 0) {\r
227	DEBUG ((EFI_D_ERROR, "%a: unsupported nonzero MMIO32 translation "\r
228	"0x%Lx\n", __FUNCTION__, MmioTranslation));\r
229	return EFI_UNSUPPORTED;\r
230	}\r
231	\r
232	break;\r
233	}\r
234	}\r
235	if (IoSize == 0 \|\| MmioSize == 0) {\r
236	DEBUG ((EFI_D_ERROR, "%a: %a space empty\n", __FUNCTION__,\r
237	(IoSize == 0) ? "IO" : "MMIO32"));\r
238	return EFI_PROTOCOL_ERROR;\r
239	}\r
240	\r
241	PcdSet64 (PcdPciExpressBaseAddress, ConfigBase);\r
242	\r
243	PcdSet32 (PcdPciBusMin, BusMin);\r
244	PcdSet32 (PcdPciBusMax, BusMax);\r
245	\r
246	PcdSet64 (PcdPciIoBase, IoBase);\r
247	PcdSet64 (PcdPciIoSize, IoSize);\r
248	PcdSet64 (PcdPciIoTranslation, IoTranslation);\r
249	\r
250	PcdSet32 (PcdPciMmio32Base, (UINT32)MmioBase);\r
251	PcdSet32 (PcdPciMmio32Size, (UINT32)MmioSize);\r
252	\r
253	PcdSetBool (PcdPciDisableBusEnumeration, FALSE);\r
254	\r
255	DEBUG ((EFI_D_INFO, "%a: Config[0x%Lx+0x%Lx) Bus[0x%x..0x%x] "\r
256	"Io[0x%Lx+0x%Lx)@0x%Lx Mem[0x%Lx+0x%Lx)@0x%Lx\n", __FUNCTION__, ConfigBase,\r
257	ConfigSize, BusMin, BusMax, IoBase, IoSize, IoTranslation, MmioBase,\r
258	MmioSize, MmioTranslation));\r
259	return EFI_SUCCESS;\r
260	}\r
261	\r
262	\r
ad106932 AB	263	EFI_STATUS\r
	264	EFIAPI\r
	265	InitializeVirtFdtDxe (\r
	266	IN EFI_HANDLE ImageHandle,\r
	267	IN EFI_SYSTEM_TABLE *SystemTable\r
	268	)\r
	269	{\r
cc667df0	270	VOID *Hob;\r
ad106932 AB	271	VOID *DeviceTreeBase;\r
	272	INT32 Node, Prev;\r
	273	INT32 RtcNode;\r
	274	EFI_STATUS Status;\r
	275	CONST CHAR8 *Type;\r
	276	INT32 Len;\r
	277	PROPERTY_TYPE PropType;\r
	278	CONST VOID *RegProp;\r
	279	VIRTIO_TRANSPORT_DEVICE_PATH *DevicePath;\r
	280	EFI_HANDLE Handle;\r
	281	UINT64 RegBase;\r
ad652d46 LE	282	UINT64 FwCfgSelectorAddress;\r
	283	UINT64 FwCfgSelectorSize;\r
	284	UINT64 FwCfgDataAddress;\r
	285	UINT64 FwCfgDataSize;\r
50b91449 LE	286	UINT64 FwCfgDmaAddress;\r
50b91449 LE	287	UINT64 FwCfgDmaSize;\r
8b816c62	288	BOOLEAN HavePci;\r
ad106932	289	\r
cc667df0 AB	290	Hob = GetFirstGuidHob(&gFdtHobGuid);\r
	291	if (Hob == NULL \|\| GET_GUID_HOB_DATA_SIZE (Hob) != sizeof (UINT64)) {\r
	292	return EFI_NOT_FOUND;\r
	293	}\r
	294	DeviceTreeBase = (VOID )(UINTN)(UINT64 *)GET_GUID_HOB_DATA (Hob);\r
ad106932 AB	295	\r
	296	if (fdt_check_header (DeviceTreeBase) != 0) {\r
	297	DEBUG ((EFI_D_ERROR, "%a: No DTB found @ 0x%p\n", __FUNCTION__, DeviceTreeBase));\r
	298	return EFI_NOT_FOUND;\r
	299	}\r
	300	\r
ad106932 AB	301	DEBUG ((EFI_D_INFO, "%a: DTB @ 0x%p\n", __FUNCTION__, DeviceTreeBase));\r
	302	\r
	303	RtcNode = -1;\r
8b816c62	304	HavePci = FALSE;\r
ad106932 AB	305	//\r
	306	// Now enumerate the nodes and install peripherals that we are interested in,\r
	307	// i.e., GIC, RTC and virtio MMIO nodes\r
	308	//\r
	309	for (Prev = 0;; Prev = Node) {\r
	310	Node = fdt_next_node (DeviceTreeBase, Prev, NULL);\r
	311	if (Node < 0) {\r
	312	break;\r
	313	}\r
	314	\r
	315	Type = fdt_getprop (DeviceTreeBase, Node, "compatible", &Len);\r
	316	if (Type == NULL) {\r
	317	continue;\r
	318	}\r
	319	\r
	320	PropType = GetTypeFromNode (Type, Len);\r
	321	if (PropType == PropertyTypeUnknown) {\r
	322	continue;\r
	323	}\r
	324	\r
	325	//\r
	326	// Get the 'reg' property of this node. For now, we will assume\r
	327	// 8 byte quantities for base and size, respectively.\r
	328	// TODO use #cells root properties instead\r
	329	//\r
	330	RegProp = fdt_getprop (DeviceTreeBase, Node, "reg", &Len);\r
479d5c41	331	ASSERT (RegProp != NULL);\r
ad106932 AB	332	\r
ad106932 AB	333	switch (PropType) {\r
65bb13b0 LE	334	case PropertyTypePciHost:\r
	335	ASSERT (Len == 2 * sizeof (UINT64));\r
	336	Status = ProcessPciHost (DeviceTreeBase, Node, RegProp);\r
	337	ASSERT_EFI_ERROR (Status);\r
8b816c62	338	HavePci = TRUE;\r
65bb13b0 LE	339	break;\r
65bb13b0 LE	340	\r
ad652d46 LE	341	case PropertyTypeFwCfg:\r
	342	ASSERT (Len == 2 * sizeof (UINT64));\r
	343	\r
	344	FwCfgDataAddress = fdt64_to_cpu (((UINT64 *)RegProp)[0]);\r
	345	FwCfgDataSize = 8;\r
	346	FwCfgSelectorAddress = FwCfgDataAddress + FwCfgDataSize;\r
	347	FwCfgSelectorSize = 2;\r
	348	\r
	349	//\r
	350	// The following ASSERT()s express\r
	351	//\r
	352	// Address + Size - 1 <= MAX_UINTN\r
	353	//\r
	354	// for both registers, that is, that the last byte in each MMIO range is\r
	355	// expressible as a MAX_UINTN. The form below is mathematically\r
	356	// equivalent, and it also prevents any unsigned overflow before the\r
	357	// comparison.\r
	358	//\r
	359	ASSERT (FwCfgSelectorAddress <= MAX_UINTN - FwCfgSelectorSize + 1);\r
	360	ASSERT (FwCfgDataAddress <= MAX_UINTN - FwCfgDataSize + 1);\r
	361	\r
	362	PcdSet64 (PcdFwCfgSelectorAddress, FwCfgSelectorAddress);\r
	363	PcdSet64 (PcdFwCfgDataAddress, FwCfgDataAddress);\r
	364	\r
	365	DEBUG ((EFI_D_INFO, "Found FwCfg @ 0x%Lx/0x%Lx\n", FwCfgSelectorAddress,\r
	366	FwCfgDataAddress));\r
50b91449 LE	367	\r
	368	if (fdt64_to_cpu (((UINT64 *)RegProp)[1]) >= 0x18) {\r
	369	FwCfgDmaAddress = FwCfgDataAddress + 0x10;\r
	370	FwCfgDmaSize = 0x08;\r
	371	\r
	372	//\r
	373	// See explanation above.\r
	374	//\r
	375	ASSERT (FwCfgDmaAddress <= MAX_UINTN - FwCfgDmaSize + 1);\r
	376	\r
	377	PcdSet64 (PcdFwCfgDmaAddress, FwCfgDmaAddress);\r
	378	DEBUG ((EFI_D_INFO, "Found FwCfg DMA @ 0x%Lx\n", FwCfgDmaAddress));\r
	379	}\r
ad652d46 LE	380	break;\r
ad652d46 LE	381	\r
ad106932 AB	382	case PropertyTypeVirtio:\r
	383	ASSERT (Len == 16);\r
	384	//\r
	385	// Create a unique device path for this transport on the fly\r
	386	//\r
	387	RegBase = fdt64_to_cpu (((UINT64 *)RegProp)[0]);\r
	388	DevicePath = (VIRTIO_TRANSPORT_DEVICE_PATH *)CreateDeviceNode (\r
	389	HARDWARE_DEVICE_PATH,\r
	390	HW_VENDOR_DP,\r
	391	sizeof (VIRTIO_TRANSPORT_DEVICE_PATH));\r
	392	if (DevicePath == NULL) {\r
	393	DEBUG ((EFI_D_ERROR, "%a: Out of memory\n", __FUNCTION__));\r
	394	break;\r
	395	}\r
	396	\r
73bb8e68 LE	397	CopyMem (&DevicePath->Vendor.Guid, &gVirtioMmioTransportGuid,\r
73bb8e68 LE	398	sizeof (EFI_GUID));\r
ad106932 AB	399	DevicePath->PhysBase = RegBase;\r
	400	SetDevicePathNodeLength (&DevicePath->Vendor,\r
	401	sizeof (*DevicePath) - sizeof (DevicePath->End));\r
	402	SetDevicePathEndNode (&DevicePath->End);\r
	403	\r
	404	Handle = NULL;\r
	405	Status = gBS->InstallProtocolInterface (&Handle,\r
	406	&gEfiDevicePathProtocolGuid, EFI_NATIVE_INTERFACE,\r
	407	DevicePath);\r
	408	if (EFI_ERROR (Status)) {\r
	409	DEBUG ((EFI_D_ERROR, "%a: Failed to install the EFI_DEVICE_PATH "\r
	410	"protocol on a new handle (Status == %r)\n",\r
	411	__FUNCTION__, Status));\r
	412	FreePool (DevicePath);\r
	413	break;\r
	414	}\r
	415	\r
	416	Status = VirtioMmioInstallDevice (RegBase, Handle);\r
	417	if (EFI_ERROR (Status)) {\r
	418	DEBUG ((EFI_D_ERROR, "%a: Failed to install VirtIO transport @ 0x%Lx "\r
	419	"on handle %p (Status == %r)\n", __FUNCTION__, RegBase,\r
	420	Handle, Status));\r
	421	\r
	422	Status = gBS->UninstallProtocolInterface (Handle,\r
	423	&gEfiDevicePathProtocolGuid, DevicePath);\r
	424	ASSERT_EFI_ERROR (Status);\r
	425	FreePool (DevicePath);\r
	426	}\r
	427	break;\r
	428	\r
ad106932 AB	429	case PropertyTypeRtc:\r
	430	ASSERT (Len == 16);\r
	431	\r
	432	RegBase = fdt64_to_cpu (((UINT64 *)RegProp)[0]);\r
	433	ASSERT (RegBase < MAX_UINT32);\r
	434	\r
	435	PcdSet32 (PcdPL031RtcBase, (UINT32)RegBase);\r
	436	\r
	437	DEBUG ((EFI_D_INFO, "Found PL031 RTC @ 0x%Lx\n", RegBase));\r
	438	RtcNode = Node;\r
	439	break;\r
	440	\r
6abe83c3 AB	441	case PropertyTypeXen:\r
	442	ASSERT (Len == 16);\r
	443	\r
	444	//\r
	445	// Retrieve the reg base from this node and wire it up to the\r
	446	// MMIO flavor of the XenBus root device I/O protocol\r
	447	//\r
	448	RegBase = fdt64_to_cpu (((UINT64 *)RegProp)[0]);\r
	449	Handle = NULL;\r
	450	Status = XenIoMmioInstall (&Handle, RegBase);\r
	451	if (EFI_ERROR (Status)) {\r
	452	DEBUG ((EFI_D_ERROR, "%a: XenIoMmioInstall () failed on a new handle "\r
	453	"(Status == %r)\n", __FUNCTION__, Status));\r
	454	break;\r
	455	}\r
	456	\r
	457	DEBUG ((EFI_D_INFO, "Found Xen node with Grant table @ 0x%Lx\n", RegBase));\r
	458	\r
	459	break;\r
	460	\r
ad106932 AB	461	default:\r
	462	break;\r
	463	}\r
	464	}\r
	465	\r
7a63d291 AB	466	if (!FeaturePcdGet (PcdPureAcpiBoot)) {\r
	467	//\r
	468	// Only install the FDT as a configuration table if we want to leave it up\r
	469	// to the OS to decide whether it prefers ACPI over DT.\r
8b816c62	470	//\r
7a63d291 AB	471	Status = gBS->InstallConfigurationTable (&gFdtTableGuid, DeviceTreeBase);\r
	472	ASSERT_EFI_ERROR (Status);\r
	473	\r
8b816c62	474	//\r
7a63d291 AB	475	// UEFI takes ownership of the RTC hardware, and exposes its functionality\r
	476	// through the UEFI Runtime Services GetTime, SetTime, etc. This means we\r
	477	// need to disable it in the device tree to prevent the OS from attaching its\r
	478	// device driver as well.\r
8b816c62	479	//\r
7a63d291 AB	480	if ((RtcNode != -1) &&\r
	481	fdt_setprop_string (DeviceTreeBase, RtcNode, "status",\r
	482	"disabled") != 0) {\r
	483	DEBUG ((EFI_D_WARN, "Failed to set PL031 status to 'disabled'\n"));\r
8b816c62	484	}\r
7a63d291 AB	485	\r
	486	if (HavePci) {\r
	487	//\r
	488	// Set the /chosen/linux,pci-probe-only property to 1, so that the PCI\r
	489	// setup we will perform in the firmware is honored by the Linux OS,\r
	490	// rather than torn down and done from scratch. This is generally a more\r
	491	// sensible approach, and aligns with what ACPI based OSes do in general.\r
	492	//\r
	493	// In case we are exposing an emulated VGA PCI device to the guest, which\r
	494	// may subsequently get exposed via the Graphics Output protocol and\r
	495	// driven as an efifb by Linux, we need this setting to prevent the\r
	496	// framebuffer from becoming unresponsive.\r
	497	//\r
	498	Node = fdt_path_offset (DeviceTreeBase, "/chosen");\r
	499	if (Node < 0) {\r
	500	Node = fdt_add_subnode (DeviceTreeBase, 0, "/chosen");\r
	501	}\r
	502	if (Node < 0 \|\|\r
	503	fdt_setprop_u32 (DeviceTreeBase, Node, "linux,pci-probe-only", 1) < 0) {\r
	504	DEBUG ((EFI_D_WARN, "Failed to set /chosen/linux,pci-probe-only property\n"));\r
	505	}\r
8b816c62 AB	506	}\r
8b816c62 AB	507	}\r
ad106932 AB	508	return EFI_SUCCESS;\r
ad106932 AB	509	}\r