[SeaBIOS] RFE: Print amount of RAM

[Kevin O'Connor]

On Wed, Feb 22, 2012 at 11:36:48PM -0000, Igor Galić wrote:
> Hello happy people,
> 
> I'm back from a two day goose-chase where I was wondering
> very much why my VMs don't boot.
> 
>   https://www.redhat.com/archives/libvirt-users/2012-February/msg00106.html
> 
> In that process I upgraded my entire stack (libvirt, qemu,
> seabios) but found that the boot hung at SeaBIOS trying to
> boot from ROM.
> After stepping through all the arguments libvirt supplied
> to I found that my <memory>2048</memory> the qemu argument
> -m 2 (megs) -- which wasn't quite enough. (Similarly, my
> previously supplied <memory>20480</memory> weren't too much
> they too were too little to boot a Linux kernel).
> 
> I've already talked to the libvirt folks, and they'll try
> to get in a feature to supply a <memory unit="M"> or similar.
> 
> Now I'd like to ask you guys if you could print the amount
> of RAM available -- like most other BIOSes out there already
> do - it would be extremely helpful to aid troubleshooting.

SeaBIOS boots too fast for anything useful to be seen on the screen.
That said, one can add "-chardev stdio,id=seabios -device
isa-debugcon,iobase=0x402,chardev=seabios" to the qemu command line to
see the SeaBIOS debugging output.  That output has the memory info and
much more.

-Kevin