Re: [Qemu-devel] [PATCH 3/3] PPC PReP: can run without bios image

[Artyom Tarasenko <atar4qemu@gmail.com>]

On Thu, Apr 4, 2013 at 11:50 AM, Alexander Graf <agraf@suse.de> wrote:
>
> On 04.04.2013, at 11:46, Artyom Tarasenko wrote:
>
>> On Thu, Apr 4, 2013 at 10:37 AM, Fabien Chouteau <chouteau@adacore.com> wrote:
>>>
>>> On 04/03/2013 06:59 PM, Alexander Graf wrote:
>>>>
>>>> On 03.04.2013, at 18:40, Fabien Chouteau wrote:
>>>>
>>>>> If we use an ELF kernel there's no need for bios. '-bios -' means no
>>>>> bios.
>>>>
>>>> This sounds like you're actually looking for a way to load an ELF blob
>>>> as bios using -bios, not a kernel, no?
>>>>
>>>
>>> No, we load the kernel with -kernel, that's what the first patch does.
>>> But the board is implemented in such way that you can't start without a
>>> bios. If the -bios switch is not present, then the board uses the
>>> default bios. This patch allows to start without a bios:
>>>
>>> -kernel <PROGRAM> -bios -
>>
>> Regardless of the firmware vs. kernel discussion, I think the syntax
>> may be improved. Under *nix '-' is commonly used for stdin. Would it
>> be possible to specify /dev/null (under *NIX) or NUL (in the
>> MS-World)? I think it would make the syntax more explicit.
>
> I'd be inclined to say that running -kernel without -bios is simply bogus and shouldn't ever happen.

QEMU does it at least in one other architectures though: leon3_generic.

--
Regards,
Artyom Tarasenko

linux/sparc and solaris/sparc under qemu blog:
http://tyom.blogspot.com/search/label/qemu