[Qemu-devel] Re: [PATCH 4/4] ppc4xx: load Bamboo kernel, initrd, and fdt at fixed addresses

[Hollis Blanchard]

On Thu, Aug 5, 2010 at 7:39 PM, Liu Yu-B13201 <address@hidden> wrote:
>
>
>> -----Original Message-----
>> From: address@hidden
>> [mailto:address@hidden On Behalf Of Hollis Blanchard
>> Sent: Thursday, August 05, 2010 8:22 AM
>> To: address@hidden
>> Cc: address@hidden
>> Subject: [PATCH 4/4] ppc4xx: load Bamboo kernel, initrd, and
>> fdt at fixed addresses
>>
>> We can't use the return value of load_uimage() for the kernel
>> because it
>> can't account for BSS size, and the PowerPC kernel does not relocate
>> blobs before zeroing BSS.
>>
>> Instead, we now load at the fixed addresses chosen by u-boot
>> (the normal
>> firmware for the board).
>>
>
> What will us do if the uImage become bigger and fixed size is not
> enough?

That was my question to Edgar, which was not answered. In u-boot, one
would change some environment variables. With this code in qemu, the
only recourse would be to edit ppc440_bamboo.c and rebuild.

Perhaps in the future we can do something more sophisticated by
specifying load addresses in a qemu device tree, but I don't
understand that stuff enough to know if that is an intended use.

-Hollis