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Date: Sun, 5 Dec 1999 22:43:54 +0900 (JST)
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Subject: kern/15279: Please fix handling Ross(?) host to PCI bridge
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>Number:         15279
>Category:       kern
>Synopsis:       Please fix handling Ross(?) host to PCI bridge
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sun Dec  5 05:50:00 PST 1999
>Closed-Date:
>Last-Modified:
>Originator:     NOKUBI Hirotaka
>Release:        FreeBSD 4.0-CURRENT i386
>Organization:
>Environment:

FreeBSD alphazeal.nokubi.or.jp 4.0-CURRENT FreeBSD 4.0-CURRENT #8: Sun Dec  5 21:39:51 JST 1999     h-nokubi@alphazeal.nokubi.or.jp:/usr/src/src/sys/compile/MP  i386

>Description:

I'm using NEC PC-9821RvII (It's not PC-AT compatible).
After I got bootstrap message `Ross(?)', I cannot use PCI bus.

>How-To-Repeat:


>Fix:

It seems that reading from 0x45 has no meaning on my machine.
Without following patch, my machine reports like this.

pcib255: <Ross (?) host to PCI bridge> on motherboard

And no other PCI devices are found, cannot mount root device, then panic.
It seems that pci_cfgread() returns 0xff.

PC9821RvII uses Champion as it's chip set. Champion is product of
Reliance Computer, I beleive. So, I feel strange about message `Ross(?)'.
`RCC' is more precise?

Index: i386/isa/pcibus.c
===================================================================
RCS file: /home/ncvs/src/sys/i386/isa/pcibus.c,v
retrieving revision 1.50
diff -u -u -r1.50 pcibus.c
--- pcibus.c	1999/11/18 08:58:37	1.50
+++ pcibus.c	1999/12/05 13:02:17
@@ -395,7 +395,9 @@
 	case 0x00051166:
 		s = "Ross (?) host to PCI bridge";
 		/* just guessing the secondary bus register number ... */
+#if 0
 		*busnum = pci_cfgread(cfg, 0x45, 1);
+#endif
 		break;
 
 		/* Integrated Micro Solutions -- vendor 0x10e0 */


>Release-Note:
>Audit-Trail:
>Unformatted:


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