Module Name:    src
Committed By:   dyoung
Date:           Thu Aug 25 15:06:10 UTC 2011

Modified Files:
        src/sys/arch/x86/include: bus_defs.h

Log Message:
Add to x86 bus_space_tag_t a member, bst_exists, that tells whether a
routine is overridden by this tag or by any ancestral tag.


To generate a diff of this commit:
cvs rdiff -u -r1.1 -r1.2 src/sys/arch/x86/include/bus_defs.h

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.

Modified files:

Index: src/sys/arch/x86/include/bus_defs.h
diff -u src/sys/arch/x86/include/bus_defs.h:1.1 src/sys/arch/x86/include/bus_defs.h:1.2
--- src/sys/arch/x86/include/bus_defs.h:1.1	Fri Jul  1 17:10:01 2011
+++ src/sys/arch/x86/include/bus_defs.h	Thu Aug 25 15:06:10 2011
@@ -1,4 +1,4 @@
-/*	$NetBSD: bus_defs.h,v 1.1 2011/07/01 17:10:01 dyoung Exp $	*/
+/*	$NetBSD: bus_defs.h,v 1.2 2011/08/25 15:06:10 dyoung Exp $	*/
 
 /*-
  * Copyright (c) 1996, 1997, 1998, 2001 The NetBSD Foundation, Inc.
@@ -86,7 +86,12 @@
 struct bus_space_tag {
 	int					bst_type;
 	bus_space_tag_t				bst_super;
+	/* bst_present: bitmap indicating overrides present (1) in *this* tag,
+	 * bst_exists: bitmap indicating overrides present (1) in *this* tag
+	 * or in an ancestor's tag (follow bst_super to ancestors)
+	 */
 	uint64_t				bst_present;
+	uint64_t				bst_exists;
 	const struct bus_space_overrides	*bst_ov;
 	void					*bst_ctx;
 };

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