2 files changed, 82 insertions, 1 deletions
diff --git a/src/core/device.c b/src/core/device.c
index 1a227fd9c..cb2c23b0a 100644
--- a/src/core/device.c
+++ b/src/core/device.c
@@ -21,8 +21,9 @@ FILE_LICENCE ( GPL2_OR_LATER );
 #include <string.h>
 #include <ipxe/list.h>
 #include <ipxe/tables.h>
-#include <ipxe/device.h>
 #include <ipxe/init.h>
+#include <ipxe/interface.h>
+#include <ipxe/device.h>
 
 /**
  * @file
@@ -105,3 +106,27 @@ struct startup_fn startup_devices __startup_fn ( STARTUP_NORMAL ) = {
 	.startup = probe_devices,
 	.shutdown = remove_devices,
 };
+
+/**
+ * Identify a device behind an interface
+ *
+ * @v intf		Interface
+ * @ret device		Device, or NULL
+ */
+struct device * identify_device ( struct interface *intf ) {
+	struct interface *dest;
+	identify_device_TYPE ( void * ) *op =
+		intf_get_dest_op ( intf, identify_device, &dest );
+	void *object = intf_object ( dest );
+	void *device;
+
+	if ( op ) {
+		device = op ( object );
+	} else {
+		/* Default is to return NULL */
+		device = NULL;
+	}
+
+	intf_put ( dest );
+	return device;
+}
diff --git a/src/core/edd.c b/src/core/edd.c
new file mode 100644
index 000000000..8ba24b17f
--- /dev/null
+++ b/src/core/edd.c
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2010 Michael Brown <mbrown@fensystems.co.uk>.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+#include <errno.h>
+#include <ipxe/interface.h>
+#include <ipxe/edd.h>
+
+/** @file
+ *
+ * Enhanced Disk Drive specification
+ *
+ */
+
+/**
+ * Describe a disk device using EDD
+ *
+ * @v intf		Interface
+ * @v type		EDD interface type
+ * @v path		EDD device path
+ * @ret rc		Return status code
+ */
+int edd_describe ( struct interface *intf, struct edd_interface_type *type,
+		   union edd_device_path *path ) {
+	struct interface *dest;
+	edd_describe_TYPE ( void * ) *op =
+		intf_get_dest_op ( intf, edd_describe, &dest );
+	void *object = intf_object ( dest );
+	int rc;
+
+	if ( op ) {
+		rc = op ( object, type, path );
+	} else {
+		/* Default is to not support this operation */
+		rc = -ENOTSUP;
+	}
+
+	intf_put ( dest );
+	return rc;
+}