[OpenBIOS] Missing portid properties

Tarl Neustaedter tarl-b2 at tarl.net
Mon May 3 21:39:37 CEST 2010


On 2010-5-3 3:32 PM, Blue Swirl wrote:
> [...]
>>   There's also more huge chunks of Forth embedded in
>> http://src.opensolaris.org/source/xref/systemz/sirius/usr/src/uts/sun4/os/startup.c
>>      
> The memory map in the file claims that OBP's start address would be
> 0xf0000000. This would mean 256MB of space, solving some of the memory
> problems we've had.
>    

0xf000.0000 is where OBP usually lives in virtual space on Sun machines. 
In sun4u/sun4s machines it tried to place itself at the very top of the 
first contiguous chunk of memory (which usually meant at the top of 
physical memory) - it copies itself out of PROM and into memory for 
performance reasons.

Still have the item about registers to look up, haven't forgotten it.




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