Re: [Qemu-devel] [6271] Use ESCC for PowerMac serial

[Blue Swirl <blauwirbel@gmail.com>]

On 1/13/09, Aurelien Jarno <aurelien@aurel32.net> wrote:
> Blue Swirl a écrit :
>
> > On 1/13/09, Aurelien Jarno <aurelien@aurel32.net> wrote:
>  >> On Mon, Jan 12, 2009 at 10:59:11PM +0200, Blue Swirl wrote:
>  >>  > On 1/12/09, Aurelien Jarno <aurelien@aurel32.net> wrote:
>  >>  > > On Mon, Jan 12, 2009 at 09:40:49PM +0100, Aurelien Jarno wrote:
>  >>  > >  > On Mon, Jan 12, 2009 at 10:32:43PM +0200, Blue Swirl wrote:
>  >>  > >  > > On 1/12/09, Aurelien Jarno <aurelien@aurel32.net> wrote:
>  >>  > >  > > > On Mon, Jan 12, 2009 at 05:40:24PM +0000, Blue Swirl wrote:
>  >>  > >  > >
>  >>  > >
>  >>  > > > > Strange, at least Debian 3.1 R8 (CD and direct -kernel), Debian 4.0 R5
>  >>  > >  > > (CD and direct -kernel), Debian 4.0 R6 and Gentoo 2008.0 act like
>  >>  > >  > > before.
>  >>  > >  >
>  >>  > >  > I have the same problem with a CDROM, an hard disk, -kernel.
>  >>  > >  >
>  >>  > >  > > What kind of setup do you have? At least OpenBIOS config is not
>  >>  > >  > > standard, you have enabled PCI debugging.
>  >>  > >  >
>  >>  > >  > I have built OpenBIOS by hand, native build. This is the unmodified SVN.
>  >>  > >  >
>  >>  > >
>  >>  > >
>  >>  > > The PCI debugging is enabled by default on the native build, and disable
>  >>  > >  on the cross-build. Disabling the PCI code fixes (or workarounds?) the
>  >>  > >  problem.
>  >>  >
>  >>  > It looks like the address of the boot serial is bad, if I change it to
>  >>  > 0x7f013000, PCI debug output works. Maybe something maps over the
>  >>  > address at some point.
>  >>
>  >>
>  >> 0x80013000 is in the middle of the PCI space, so you are hitting another
>  >>  device, probably the VGA card. 0x7f013000 is unused but we have to limit
>  >>  the memory to 2032MiB
>  >
>  > How about some higher address then, like 0xef013000?
>  >
>
>
> The PCI space uses 80000000-fdffffff. The ISA IO space uses
>  fe000000-fe0200000. OpenBios uses 0xfff00000-0xffffffff. This leaves
>  very few possibilities.
>
>  Alternatively we can map the whole MacIO device at a fixed location
>  which also makes the location of the serial ports fixed. The G3 beige
>  uses f3000000-f307ffff for the MacIO device.

I just wonder what this means for PCI mapping, will MacIO appear twice
(like ESCC now)?