Re: [Qemu-devel] Problems with Prep IDE

[Tero Kaarlela <turo.kaarlela@co.inet.fi>]

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