[src/trunk]: src/sys/arch/x86/include comment

[yamt <yamt%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/56d9b107eec7
branches:  trunk
changeset: 764506:56d9b107eec7
user:      yamt <yamt%NetBSD.org@localhost>
date:      Mon Apr 25 22:24:36 2011 +0000

description:
comment

diffstat:

 sys/arch/x86/include/pmap.h |  4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diffs (18 lines):

diff -r 8cf785df7f56 -r 56d9b107eec7 sys/arch/x86/include/pmap.h
--- a/sys/arch/x86/include/pmap.h       Mon Apr 25 22:24:00 2011 +0000
+++ b/sys/arch/x86/include/pmap.h       Mon Apr 25 22:24:36 2011 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: pmap.h,v 1.36 2011/04/25 22:24:00 yamt Exp $   */
+/*     $NetBSD: pmap.h,v 1.37 2011/04/25 22:24:36 yamt Exp $   */
 
 /*
  * Copyright (c) 1997 Charles D. Cranor and Washington University.
@@ -78,6 +78,8 @@
 
 /*
  * pl*_i: generate index into pde/pte arrays in virtual space
+ *
+ * pl_i(va, X) == plX_i(va) <= pl_i_roundup(va, X)
  */
 #define pl1_i(VA)      (((VA_SIGN_POS(VA)) & L1_FRAME) >> L1_SHIFT)
 #define pl2_i(VA)      (((VA_SIGN_POS(VA)) & L2_FRAME) >> L2_SHIFT)