[LinuxBIOS] VGA help under QEMU

[Myles Watson]

On Dec 13, 2007 3:01 PM, ron minnich <rminnich at gmail.com> wrote:
> my apologies, it was a big going-away lunch and I am now sleepy.

No problem.

> I just did a build with latest v3, built a 256kb bios, copy it to a
> directory, run qemu as follows:
> qemu -serial stdio -L . -kernel linux-2.6.15-bochs/vmlinux -hdc hda -hda hda
>
> and I get video.
>
> I am using the vgabios-cirrus.bin

I'm not specifying the vgabios specifically, but v2 finds the vgabios-cirrus.bin

> Option ROMS are run in Phase 6.
> Mine looks like this:
>
> Phase 6: Initializing devices...
> Phase 6: Root Device init.
> Phase 6: PCI: 00:00.0 init.
> PCI: pci_dev_init
> Probing for option ROM
> Phase 6: PCI: 00:01.0 init.
> Initializing realtime clock.
> RTC: Checksum invalid zeroing cmos
> Invalid LinuxBIOS CMOS checksum.
> Phase 6: PCI: 00:01.1 init.
> Enabling IDE channel 1
> Enabling IDE channel 2
> Enabling Legacy IDE
> Phase 6: PCI: 00:01.3 init.
> Enabling SMBus.
> Enable Power Management Functions
> Phase 6: PCI: 00:02.0 init.
> PCI: pci_dev_init
> Probing for option ROM
> ROM address for PCI: 00:02.0 = c0000
> PCI Expansion ROM, signature 0xaa55, INIT size 0x8c00, data ptr 0x0038
> PCI ROM Image, Vendor 1013, Device 00b8,
> PCI ROM Image, Class Code 030000, Code Type 00
> Copying VGA ROM image from 0x000c0000 to 0xc0000, 0x8c00 bytes
> Phase 6: PCI: 00:03.0 init.
> PCI: pci_dev_init
> Probing for option ROM
> Phase 6: PCI: 00:04.0 init.
> PCI: pci_dev_init
> Probing for option ROM
> Phase 6: Devices initialized.
>
>
> When I look at yours I see an error:
> Phase 6: PCI: 00:02.0 init.
>
> PCI: pci_dev_init
>
> Probing for option ROM
>
> ROM address for PCI: 00:02.0 = c0000
>
> PCI Expansion ROM, signature 0xaa55, INIT size 0x8a00, data ptr 0x736f
>
> PCI ROM Image, Vendor 0846, Device ec89,
>
> Device or Vendor ID mismatch Vendor 0846, Device ec89
>
>
> see the mismatch? So it will not run the rom. The option rom does not
> match the hardware .

Good catch.

> What vga bios are you using? I hope to wake up more soon and might
> actually give a useful answer :-)

I don't know where it's getting another VGA bios.  I tried removing
the other vgabios.bin file from the directory, but I get the same
results.

I looked in the pci.ids file, and the Vendor ID is not there, so I'm
not sure what the problem is.

Myles

>