[src/trunk]: src/sys/dev/pci Add comment.

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

details:   https://anonhg.NetBSD.org/src/rev/2ab5f653ad6e
branches:  trunk
changeset: 333203:2ab5f653ad6e
user:      msaitoh <msaitoh%NetBSD.org@localhost>
date:      Thu Oct 23 09:57:37 2014 +0000

description:
Add comment.

diffstat:

 sys/dev/pci/pcireg.h |  4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diffs (18 lines):

diff -r 8261a4574dbf -r 2ab5f653ad6e sys/dev/pci/pcireg.h
--- a/sys/dev/pci/pcireg.h      Thu Oct 23 08:55:32 2014 +0000
+++ b/sys/dev/pci/pcireg.h      Thu Oct 23 09:57:37 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: pcireg.h,v 1.97 2014/10/06 07:15:56 msaitoh Exp $      */
+/*     $NetBSD: pcireg.h,v 1.98 2014/10/23 09:57:37 msaitoh Exp $      */
 
 /*
  * Copyright (c) 1995, 1996, 1999, 2000
@@ -289,7 +289,7 @@
 #define                PCI_INTERFACE_RTC_ISA                   0x01
 #define        PCI_SUBCLASS_SYSTEM_PCIHOTPLUG          0x04
 #define        PCI_SUBCLASS_SYSTEM_SDHC                0x05
-#define        PCI_SUBCLASS_SYSTEM_IOMMU               0x06
+#define        PCI_SUBCLASS_SYSTEM_IOMMU               0x06 /* or RCEC in old spec */
 #define        PCI_SUBCLASS_SYSTEM_RCEC                0x07
 #define        PCI_SUBCLASS_SYSTEM_MISC                0x80