[openfirmware] Troubleshooting VGA under qemu? [patch]

[Marcin Cieslak]

On Sat, 3 Oct 2015, James Cameron wrote:

> > Can you show me your .properties of the vmware display?
> 
> assigned-addresses       81001010 00000000 00008010 00000000 00000010 
>                          82001014 00000000 10000000 00000000 01000000 
>                          82001018 00000000 11000000 00000000 00010000 
> reg                      00001000 00000000 00000000 00000000 00000000 
>                          01001010 00000000 00000000 00000000 00000010 
>                          02001014 00000000 00000000 00000000 01000000 
>                          02001018 00000000 00000000 00000000 00010000 

This is all fine, your resources got allocated.

As far as I understand we communicate with vmware VGA via the fifo area
(the 02001018 resource, 0x10000 bytes) 
and maybe this fails somehow (overflows, wraps-around, whatever?)

> -vga cirrus ... works fine, does not reproduce problem.
> 
> -vga std ... does not work, with -serial $(tty) can interact with qemu
>  window as input, terminal as output.

Can you step over the initalization?

Marcin