diff options
Diffstat (limited to 'ArmVirtPkg/XenioFdtDxe')
| -rw-r--r-- | ArmVirtPkg/XenioFdtDxe/XenioFdtDxe.c | 68 | ||||
| -rw-r--r-- | ArmVirtPkg/XenioFdtDxe/XenioFdtDxe.inf | 44 |
2 files changed, 112 insertions, 0 deletions
diff --git a/ArmVirtPkg/XenioFdtDxe/XenioFdtDxe.c b/ArmVirtPkg/XenioFdtDxe/XenioFdtDxe.c new file mode 100644 index 0000000000..4a88db3217 --- /dev/null +++ b/ArmVirtPkg/XenioFdtDxe/XenioFdtDxe.c @@ -0,0 +1,68 @@ +/** @file
+* Xenio FDT client protocol driver for xen,xen DT node
+*
+* Copyright (c) 2016, Linaro Ltd. All rights reserved.<BR>
+*
+* This program and the accompanying materials are
+* licensed and made available under the terms and conditions of the BSD License
+* which accompanies this distribution. The full text of the license may be found at
+* http://opensource.org/licenses/bsd-license.php
+*
+* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+*
+**/
+
+#include <Library/BaseLib.h>
+#include <Library/DebugLib.h>
+#include <Library/UefiDriverEntryPoint.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/XenIoMmioLib.h>
+
+#include <Protocol/FdtClient.h>
+
+EFI_STATUS
+EFIAPI
+InitializeXenioFdtDxe (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_STATUS Status;
+ FDT_CLIENT_PROTOCOL *FdtClient;
+ CONST UINT64 *Reg;
+ UINT32 RegElemSize, RegSize;
+ EFI_HANDLE Handle;
+ UINT64 RegBase;
+
+ Status = gBS->LocateProtocol (&gFdtClientProtocolGuid, NULL,
+ (VOID **)&FdtClient);
+ ASSERT_EFI_ERROR (Status);
+
+ Status = FdtClient->FindCompatibleNodeReg (FdtClient, "xen,xen",
+ (CONST VOID **)&Reg, &RegElemSize, &RegSize);
+ if (EFI_ERROR (Status)) {
+ DEBUG ((EFI_D_WARN, "%a: No 'xen,xen' compatible DT node found\n",
+ __FUNCTION__));
+ return EFI_UNSUPPORTED;
+ }
+
+ ASSERT (RegSize == 16);
+
+ //
+ // Retrieve the reg base from this node and wire it up to the
+ // MMIO flavor of the XenBus root device I/O protocol
+ //
+ RegBase = SwapBytes64 (Reg[0]);
+ Handle = NULL;
+ Status = XenIoMmioInstall (&Handle, RegBase);
+ if (EFI_ERROR (Status)) {
+ DEBUG ((EFI_D_ERROR, "%a: XenIoMmioInstall () failed on a new handle "
+ "(Status == %r)\n", __FUNCTION__, Status));
+ return Status;
+ }
+
+ DEBUG ((EFI_D_INFO, "Found Xen node with Grant table @ 0x%Lx\n", RegBase));
+
+ return EFI_SUCCESS;
+}
diff --git a/ArmVirtPkg/XenioFdtDxe/XenioFdtDxe.inf b/ArmVirtPkg/XenioFdtDxe/XenioFdtDxe.inf new file mode 100644 index 0000000000..d75e4f45ae --- /dev/null +++ b/ArmVirtPkg/XenioFdtDxe/XenioFdtDxe.inf @@ -0,0 +1,44 @@ +## @file
+# Xenio FDT client protocol driver for xen,xen DT node
+#
+# Copyright (c) 2016, Linaro Ltd. All rights reserved.<BR>
+#
+# This program and the accompanying materials are
+# licensed and made available under the terms and conditions of the BSD License
+# which accompanies this distribution. The full text of the license may be found at
+# http://opensource.org/licenses/bsd-license.php
+#
+# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+##
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = XenioFdtDxe
+ FILE_GUID = 338695EA-CA84-4FA2-9DA8-5C4BB87905C6
+ MODULE_TYPE = DXE_DRIVER
+ VERSION_STRING = 1.0
+
+ ENTRY_POINT = InitializeXenioFdtDxe
+
+[Sources]
+ XenioFdtDxe.c
+
+[Packages]
+ ArmVirtPkg/ArmVirtPkg.dec
+ MdePkg/MdePkg.dec
+ OvmfPkg/OvmfPkg.dec
+
+[LibraryClasses]
+ BaseLib
+ DebugLib
+ UefiBootServicesTableLib
+ UefiDriverEntryPoint
+ XenIoMmioLib
+
+[Protocols]
+ gFdtClientProtocolGuid ## CONSUMES
+
+[Depex]
+ gFdtClientProtocolGuid
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