Added definition of a of_arguments structure which is used in all

OpenFirmware client service calls (and callbacks).
Has nice inline argument getter methods If compiled under C++.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@5205 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/kernel/boot/platform/openfirmware/openfirmware.h

@@ -15,6 +15,18 @@
 extern int gChosen;
 
 
+struct of_arguments {
+	const char	*name;
+	int			num_args;
+	int			num_returns;
+	int			data[0];
+
+#ifdef __cplusplus
+	int &Argument(int index) { return data[index]; }
+	int &ReturnValue(int index) { return data[num_args + index]; }
+#endif
+};
+
 struct of_region {
 	void	*base;
 	uint32	size;