Bug 32169

Summary:	kernel option to enable PCI devices on machines with negligent BIOS
Product:	Base System	Reporter:	Tony Finch <dot>
Component:	kern	Assignee:	freebsd-bugs (Nobody) <bugs>
Status:	Closed FIXED
Severity:	Affects Only Me
Priority:	Normal
Version:	Unspecified
Hardware:	Any
OS:	Any

Description Tony Finch 2001-11-21 17:40:00 UTC

The BIOS doesn't activate the IO ports and memory of the PCI devices,
and neither does FreeBSD, so none of them can be used. There is an
unsupported option in FreeBSD that does the job, which the patch
below makes more visible.

Fix: 

--- sys/conf/options	2001/11/03 01:41:07	1.191.2.37
+++ sys/conf/options	2001/11/21 17:17:43
@@ -386,6 +386,7 @@
 
 # PCI related options
 PCI_QUIET		opt_pci.h
+PCI_ENABLE_IO_MODES	opt_pci.h
 
 # NFS options
 NFS_MINATTRTIMO		opt_nfs.h
--- sys/i386/conf/LINT	2001/11/15 20:59:32	1.749.2.91
+++ sys/i386/conf/LINT	2001/11/21 17:14:56
@@ -1730,6 +1730,14 @@
 # PCI options
 #
 #options 	PCI_QUIET	#quiets PCI code on chipset settings
+#
+# Enable this option if your BIOS doesn't enable the IO
+# ports and memory of PCI devices by default (the symptom
+# being lots of "couldn't map ports/memory" messages at
+# boot time). It isn't enabled by default because some
+# devices respond oddly.
+#
+#options	PCI_ENABLE_IO_MODES
 
 
 # The `ahc' device provides support for the Adaptec 29/3940(U)(W)
--- sys/pci/pci.c	2001/08/30 19:42:37	1.141.2.12
+++ sys/pci/pci.c	2001/11/21 17:15:44
@@ -28,7 +28,7 @@
  */
 
 #include "opt_bus.h"
-
+#include "opt_pci.h"
 #include "opt_simos.h"
 
 #include <sys/param.h>

Comment 1 Bruce Evans 2001-11-23 12:02:01 UTC

On Wed, 21 Nov 2001, Tony Finch wrote:

> >Description:
>
> The BIOS doesn't activate the IO ports and memory of the PCI devices,
> and neither does FreeBSD, so none of them can be used. There is an
> unsupported option in FreeBSD that does the job, which the patch
> below makes more visible.
>
> >How-To-Repeat:
> >Fix:
> ...

This fix is already in -current, except it is in the wrong options files
(in only 2 of 6 machine-dependent options files, but this option is
machine-independent).

Bruce

Comment 2 Tony Finch freebsd_committer

2002-05-29 01:04:09 UTC

State Changed
From-To: open->closed

A similar patch has been committed and MFCed.