Re: [Qemu-devel] Problems with Prep IDE

[Tero Kaarlela]

J. Mayer wrote:

> On Fri, 2005-04-15 at 23:58 +0300, Tero Kaarlela wrote:
>  
>
> > Hi,
> >
> >     I am still trying to boot OS/2 PPC edition with Qemu. Non-contiguos 
> > IO map & no support for Little-endian have been solved now thanks to J. 
> > Mayer who sent me patches to work these out. Now bootloader gives me 
> > following message:
> >
> > IBM Microkernel bootloader press enter for manual boot(enter)
> >
> > and I have following boot options to choose from:
> >
> > cdrom
> > hd
> >
> > if I try to use either one of these Qemu gives me
> >
> > outl: port= 0x0cf8   data=0x80006000
> > inl: port= 0x0cfc
> > (Bootloader continues with)
> > Invalid PCI configuration
> > Device initializion failed
> >
> > Any ideas why is this?
> >    
>
> There are two problems here:
> first, the PREP PCI controller does not map its legacy ISA IO ports.
> This is a bug.
> But fixing this point is not sufficient to make the loader happy:
> it tries to access the PCI device 0x60 (96) which does not exists. Then,
> I think the lack of devices description in Open Hack'Ware residual data
> can be a good suspect for this. Or it can be that real PREP machine
> always have the IDE (or SCSI !) controller mapped as PCI device 0x60,
> but I'm very suspicious about this.
  Ok,

     What I have made now:

        1. Changed vendor id of PREP Pci bridge from 1011 to 1014 (ibm)
        2.  Tried booting and noticed that Bootloader did: 
pci_config_read: PCI Bridge address:10  value: 0xffffffff
        3. Found out that address 10 should have base adress in it.
        4. modified this with:

                       d->config[0x10] = 0x08
                       d->config[0x10] = 0x00
                       d->config[0x10] = 0x00
                       d->config[0x10] = 0xF0
              to be 0xF0000008

   Is this ok?(I just figured it out somehow)

      Now bootloader gives me:

       dma:command 0x24 not supported
       dma:command 0x25 not supported

  Just figuring out what these commands are....


Tero