[openfirmware] Troubleshooting VGA under qemu? [patch]

[Marcin Cieslak]

On Wed, 30 Sep 2015, Marcin Cieslak wrote:

> Hello,
> 
> I have tried running ofw without BIOS
> (as per http://www.openfirmware.info/Building_OFW_for_QEMU)
> and it seems that VGA support does not work.

So, I got it working.

The solution was:

Index: cpu/x86/pc/emu/emuofw.bth
===================================================================
--- cpu/x86/pc/emu/emuofw.bth   (wersja 3782)
+++ cpu/x86/pc/emu/emuofw.bth   (kopia robocza)
@@ -25,6 +25,7 @@
 in: ${BP}/dev/video/build/vmsvga.fc
 in: ${BP}/dev/ne2000/build/ne2kpci.fc
 in: ${BP}/dev/amd79970/build/vmlance.fc
+in: ${BP}/dev/video/build/bga.fc
 \ in: ${BP}/dev/video/build/video.fc
 in: ${BP}/cpu/x86/pc/biosload/linux.fth
 
@@ -58,6 +59,7 @@
 \ Just use a driver targeted at the specific chipset that QEMU emulates
    " ${BP}/dev/video/build/cirrus.fc"           " pci1013,b8"      $add-deflated-dropin
    " ${BP}/dev/video/build/vmsvga.fc"           " pci15ad,405"     $add-deflated-dropin
+   " ${BP}/dev/video/build/bga.fc"              " pci1234,1111"    $add-deflated-dropin
 
    " ${BP}/dev/ne2000/build/ne2kpci.fc"         " pci10ec,8029"    $add-deflated-dropin
    " ${BP}/dev/amd79970/build/vmlance.fc"       " pci1022,2000"    $add-deflated-dropin


Newer QEMU offers Bochs VGA adapter

~Marcin