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Hello,

On Aug 25, 2007, at 09:54, Perry Trolard wrote:

> Hi,
>
> On 8/25/07, Michael Lorenz <macallan@netbsd.org> wrote:
>> And you're absolutely sure that your kernel is built with options
>> OFB_FAKE_VGA_FB ?
>
> Yes, but just to be sure there's nothing weird that I'm missing I'm
> including my kernel config files below.
>
> Otherwise then, moving to, say, 4.0 would be a solution?

Yes.

> options MULTIPROCESSOR

That will only slow your kernel down if you don't have more than one 
CPU.

> # fast text console
> options OFB_ENABLE_CACHE
>
> # XFree86 option to get around "can't mmap screen ..." memory error
> options OFB_FAKE_VGA_FB

Hmm, I had a look at the source - the hack is not in 3.1
Since 4.x is still beta, here's what you'd need to change:

First, find ofb_mmap()
In there, between this block:
	pa = offset;
	for (i = 0; i < 6; i++) {
		switch (ap[0] & OFW_PCI_PHYS_HI_SPACEMASK) {
		case OFW_PCI_PHYS_HI_SPACE_MEM32:
			if (pa >= ap[2] && pa < ap[2] + ap[4])
				return pa;
		/* XXX I/O space? */
		}
		ap += 5;
	}

and the return -1 statement insert this:

#ifdef OFB_FAKE_VGA_FB
	if (offset >=0xa0000 && offset < 0xbffff)
		return dc->dc_paddr + offset - 0xa0000;
#endif

have fun
Michael
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