};\r
\r
\r
+STATIC EFI_LOCK mMyDeviceLock = EFI_INITIALIZE_LOCK_VARIABLE (TPL_CALLBACK);\r
+STATIC XENBUS_DEVICE *mMyDevice = NULL;\r
+\r
/**\r
Unloads an image.\r
\r
return Status;\r
}\r
\r
+VOID\r
+EFIAPI\r
+NotifyExitBoot (\r
+ IN EFI_EVENT Event,\r
+ IN VOID *Context\r
+ )\r
+{\r
+ XENBUS_DEVICE *Dev = Context;\r
+\r
+ gBS->DisconnectController(Dev->ControllerHandle,\r
+ Dev->This->DriverBindingHandle, NULL);\r
+}\r
+\r
/**\r
Starts a bus controller.\r
\r
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL\r
)\r
{\r
- return EFI_UNSUPPORTED;\r
+ EFI_STATUS Status;\r
+ XENBUS_DEVICE *Dev;\r
+\r
+ Dev = AllocateZeroPool (sizeof (*Dev));\r
+ Dev->Signature = XENBUS_DEVICE_SIGNATURE;\r
+ Dev->This = This;\r
+ Dev->ControllerHandle = ControllerHandle;\r
+\r
+ EfiAcquireLock (&mMyDeviceLock);\r
+ if (mMyDevice != NULL) {\r
+ EfiReleaseLock (&mMyDeviceLock);\r
+ //\r
+ // There is already a XenBus running, only one can be used at a time.\r
+ //\r
+ Status = EFI_ALREADY_STARTED;\r
+ goto ErrorAllocated;\r
+ }\r
+ mMyDevice = Dev;\r
+ EfiReleaseLock (&mMyDeviceLock);\r
+\r
+ Status = gBS->CreateEvent (EVT_SIGNAL_EXIT_BOOT_SERVICES, TPL_CALLBACK,\r
+ NotifyExitBoot,\r
+ (VOID*) Dev,\r
+ &Dev->ExitBootEvent);\r
+ ASSERT_EFI_ERROR (Status);\r
+\r
+ return EFI_SUCCESS;\r
+\r
+ErrorAllocated:\r
+ FreePool (Dev);\r
+ return Status;\r
}\r
\r
/**\r
IN EFI_HANDLE *ChildHandleBuffer OPTIONAL\r
)\r
{\r
- return EFI_UNSUPPORTED;\r
+ XENBUS_DEVICE *Dev = mMyDevice;\r
+\r
+ gBS->CloseEvent (Dev->ExitBootEvent);\r
+\r
+ mMyDevice = NULL;\r
+ FreePool (Dev);\r
+ return EFI_SUCCESS;\r
}\r
#define PCI_DEVICE_ID_XEN_PLATFORM 0x0001\r
\r
\r
+typedef struct _XENBUS_DEVICE XENBUS_DEVICE;\r
+\r
+// Have the state of the driver.\r
+#define XENBUS_DEVICE_SIGNATURE SIGNATURE_32 ('X','B','s','t')\r
+struct _XENBUS_DEVICE {\r
+ UINT32 Signature;\r
+ EFI_DRIVER_BINDING_PROTOCOL *This;\r
+ EFI_HANDLE ControllerHandle;\r
+ EFI_EVENT ExitBootEvent;\r
+};\r
+\r
#endif\r