From 01daecba3aa142a160f481618b7b56fb164f5ff5 Mon Sep 17 00:00:00 2001
From: thorpej <thorpej@NetBSD.org>
Date: Tue, 17 Dec 1996 01:55:56 +0000
Subject: [PATCH] Implement pci_decompose_tag().

---
 sys/arch/i386/pci/pci_machdep.c | 46 ++++++++++++++++++++++++++++++++-
 sys/arch/i386/pci/pci_machdep.h |  4 ++-
 2 files changed, 48 insertions(+), 2 deletions(-)

diff --git a/sys/arch/i386/pci/pci_machdep.c b/sys/arch/i386/pci/pci_machdep.c
index e2a0b7322c9c..842be2fcc0ea 100644
--- a/sys/arch/i386/pci/pci_machdep.c
+++ b/sys/arch/i386/pci/pci_machdep.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: pci_machdep.c,v 1.26 1996/10/24 12:32:29 fvdl Exp $	*/
+/*	$NetBSD: pci_machdep.c,v 1.27 1996/12/17 01:55:56 thorpej Exp $	*/
 
 /*
  * Copyright (c) 1996 Christopher G. Demetriou.  All rights reserved.
@@ -140,6 +140,50 @@ mode2:
 #endif
 }
 
+void
+pci_decompose_tag(pc, tag, bp, dp, fp)
+	pci_chipset_tag_t pc;
+	pcitag_t tag;
+	int *bp, *dp, *fp;
+{
+
+#ifndef PCI_CONF_MODE
+	switch (pci_mode) {
+	case 1:
+		goto mode1;
+	case 2:
+		goto mode2;
+	default:
+		panic("pci_decompose_tag: mode not configured");
+	}
+#endif
+
+#if !defined(PCI_CONF_MODE) || (PCI_CONF_MODE == 1)
+#ifndef PCI_CONF_MODE
+mode1:
+#endif
+	if (bp != NULL)
+		*bp = (tag.mode1 >> 16) & 0xff;
+	if (dp != NULL)
+		*dp = (tag.mode1 >> 11) & 0x1f;
+	if (fp != NULL)
+		*fp = (tag.mode1 >> 8) & 0x7;
+	return;
+#endif
+
+#if !defined(PCI_CONF_MODE) || (PCI_CONF_MODE == 2)
+#ifndef PCI_CONF_MODE
+mode2:
+#endif
+	if (bp != NULL)
+		*bp = tag.mode2.forward & 0xff;
+	if (dp != NULL)
+		*dp = (tag.mode2.port >> 8) & 0xf;
+	if (fp != NULL)
+		*fp = (tag.mode2.enable >> 1) & 0x7;
+#endif
+}
+
 pcireg_t
 pci_conf_read(pc, tag, reg)
 	pci_chipset_tag_t pc;
diff --git a/sys/arch/i386/pci/pci_machdep.h b/sys/arch/i386/pci/pci_machdep.h
index a47a657fb9d1..40bf7ba96edd 100644
--- a/sys/arch/i386/pci/pci_machdep.h
+++ b/sys/arch/i386/pci/pci_machdep.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: pci_machdep.h,v 1.5 1996/03/27 04:01:16 cgd Exp $	*/
+/*	$NetBSD: pci_machdep.h,v 1.6 1996/12/17 01:55:58 thorpej Exp $	*/
 
 /*
  * Copyright (c) 1996 Christopher G. Demetriou.  All rights reserved.
@@ -75,6 +75,8 @@ void		pci_attach_hook __P((struct device *, struct device *,
 		    struct pcibus_attach_args *));
 int		pci_bus_maxdevs __P((pci_chipset_tag_t, int));
 pcitag_t	pci_make_tag __P((pci_chipset_tag_t, int, int, int));
+void		pci_decompose_tag __P((pci_chipset_tag_t, pcitag_t,
+		    int *, int *, int *));
 pcireg_t	pci_conf_read __P((pci_chipset_tag_t, pcitag_t, int));
 void		pci_conf_write __P((pci_chipset_tag_t, pcitag_t, int,
 		    pcireg_t));