[OpenBIOS] QEMU and OpenBIOS

Steven Noonan steven at uplinklabs.net
Wed Aug 18 20:12:18 CEST 2010

On Wed, Aug 18, 2010 at 1:53 AM, Mark Cave-Ayland
<mark.cave-ayland at siriusit.co.uk> wrote:
> Steven Noonan wrote:
>> Hi all,
>> I just compiled OpenBIOS (from trunk) with a ton of CONFIG_DEBUG*
>> options enabled, but I'm not getting any output from them (at least,
>> under QEMU). printk() seems to work for this portion:
>>>> =============================================================
>>>> OpenBIOS 1.0 [Aug 17 2010 21:39]
>>>> Configuration device id QEMU version 1 machine id 2
>>>> CPUs: 1
>>>> Memory: 1024M
>>>> UUID: 00000000-0000-0000-0000-000000000000
>>>> CPU type PowerPC,G4
>> But nothing after that point gets printed to the serial device.
>> Any ideas where I should be looking?
>> - Steven
> Hi Steven,
> Have you enabled the CONFIG_DEBUG* options in the right file? For example,
> for debugging PPC you need to make the changes to
> config/examples/ppc_config.xml if you are doing a native build and
> config/examples/cross-ppc_config.xml if you are using a cross-compiler.

Yeah, I edited cross-ppc_config.xml, which is correct for my setup.

> Also, "make clean" isn't sufficient for a rebuild based upon a configuration
> change. Once you've made the configuration changes, you'll need to blow away
> the obj-ppc directory and re-run the switch-arch script to regenerate it
> with the new configuration.

Aha, this was it. I can't recall why, but there was some reason I was
avoiding deleting the obj-ppc directory and rebuilding after that.

Thanks for the help!

- Steven

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