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From: "John W. DeBoskey" <jwd@unx.sas.com>
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Subject: Number of pci busses probed at boot time
To: freebsd-current@freebsd.org
Date: Mon, 11 Aug 1997 14:50:15 -0400 (EDT)
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Hi,

   When I boot my system, the pci init code scans 255 pci busses
looking for devices (which are found on bus 0 & 1). So, I thought
I might reduce the number of pci busses probed...
 
   My confusion? Well, in pci.c, we have:

static int
pci_bushigh(void)
{
	if (pic_cfgopen() == 0)
		return (-1);
	return (0);
}

   and the return value is used in:

int
pci_probe(pciattach *parent)
	int bushigh;
	int bus = 0;

	bushigh = pci_bushigh();
	while (bus <= bushigh) {
		...


   So, how is the system finding ANY pci busses? The code above
seems to only return 0 or -1. Could someone enlighten me please?

Thanks,
John
-- 
jwd@unx.sas.com       (w) John W. De Boskey          (919) 677-8000 x6915