About variable "IOPortBase"
belcon zhao
belcon.zhao at siliconmotion.com.cn
Wed Mar 26 20:36:32 PDT 2008
Hi,
Sorry if I make you confused.
I got a graphic chip which support standard VGA registers. Debian can
use it normally. I mean Xorg server.
Now I want to compile a new Xorg server ( I didn't make any changes to
the source code), but I just found that it failed.
Souce code is from Debian website. So I think that I just
need ./configure && make and it should be almost same as the default one
which can work with my graphic chip.
On Wed, 2008-03-26 at 23:11 -0400, Michael Lorenz wrote:
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> Hello,
>
> On Mar 26, 2008, at 22:56, belcon zhao wrote:
>
> > Just find that Xorg compiled xf86EnableIO() of hw/xfree86/os-
> > support/linux/lnx_video.c. IOPortBase wasn't initialized in that
> > file. That's why IOPortBase is 0. So, it should be compiling
> > mistake. Did I do extra work while compile Xorg with mips?
>
> I don't know about linux but what you need is:
> - - figure out at which physical address your PCI host bridge puts IO
> space
> - - mmap() it, on linux you'd probably use /dev/mem for that
> - - set IOPortBase accordingly
>
> Xorg probably doesn't know about your particular hardware and you
> didn't give any details either. As far as I can tell the problem
> isn't MIPS, it's accessing IO space on your machine. On MIPS that
> would be memory-mapped somewhere. I can't tell you where, you need
> to figure that out on your own or tell us what exactly you're dealing
> with.
>
> have fun
> Michael
>
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