[coreboot] Allow payloads to write over Coreboot tables, add a warning

[Stefan Reinauer]

Myles Watson wrote:
>   
>> -----Original Message-----
>> From: Stefan Reinauer [mailto:stepan at coresystems.de]
>> Sent: Wednesday, May 21, 2008 3:57 PM
>> To: Myles Watson
>> Cc: Coreboot
>> Subject: Re: [coreboot] Allow payloads to write over Coreboot tables, add
>> a warning
>>
>> Myles Watson wrote:
>>     
>>> This is a simple patch which allows payloads to be placed in memory in
>>> the range of 0xf0000-0x100000, where the Coreboot tables live in v2.
>>> As long as the payload doesn't need the tables, it seems harmless, so
>>> why not just print a warning?
>>>       
>> It will definitely break your interrupt routing ... While I agree this
>> is OK for testing, we have to find a better solution for this.
>>     
>
> Yes.
>
> As soon as we decide how we want to pass information to legacybios, it
> should be clear what the better solution is.  
>
> One solution is a libpayload-based loader that copies the information and
> passes the relevant parts to legacybios.  Until legacybios uses any of that
> information, though, it might as well be copied over.
>   

It'll be fine for testing and doesn't really break anything that did
work before...

Acked-by: Stefan Reinauer <stepan at coresystems.de>