Re: [Qemu-devel] [RFC] extensions to the -m memory option

[Paolo Bonzini]

On 31/05/2015 16:05, Liviu Ionescu wrote:
> I followed your advice and I ended up with the following:
> 
> - I added a new type "cortexm-mcu" that I use as parent for all Cortex-M MCU 
> objects (like "STM32F103RB")
> 
> - I added the following properties to this type:
> 
>       cortexm-mcu.flash-sizeK=uint32

This should be okay, though more on this below.

>       cortexm-mcu.ram-sizeK=uint32

This is the same as "-m", thus probably unnecessary, but I understand
that the megabyte default unit in -m can be a bit annoying for you.
However, there were patches on the list to set a different default for
each machine.

>       cortexm-mcu.cpu-model=str

This is the same as "-cpu"

>       cortexm-mcu.kernel-filename=str

This is the same as "-kernel" i.e. "-machine kernel=str".

Regarding flash, I'm still curious about some questions I have...

1) who initializes flash contents?

2) can the running program modify flash at run-time?  if so, how?  and
if so, are the writes supposed to stick around from one QEMU invocation
to the next?

Paolo