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Re: Where does physical RAM start in kseg0?

To: Ralf Baechle <ralf@linux-mips.org>
Subject: Re: Where does physical RAM start in kseg0?
From: "Erik J. Green" <erik@greendragon.org>
Date: Sun, 13 Apr 2003 02:28:39 +0000
Cc: "linux-mips@linux-mips.org" <linux-mips@linux-mips.org>
In-reply-to: <20030413042529.A20034@linux-mips.org>
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Quoting Ralf Baechle <ralf@linux-mips.org>:

Ralf wrote:
> There is no requirement at all for a system to have physical memory in
> KSEG0 - the Octane to my knowledge one example.  What every sane system
> needs to have in KSEG0 are exception handlers.  Of course they could also
> reside in a ROM but that's insane so you should expect at least a few kb
> of RAM at physical address zero.

At this point I wouldn't put anything past SGI, but it's good to know my 
suspicions about kseg0 are confirmed.
> 
> Due to the Octane's funky address space layout and the current tools
> limitations the kernel will have to run in CKSEG2 instead of KSEG0 ...
> 
>   Ralf

/nod.  Onward and upward.

Thanks,
Erik



-- 
Erik J. Green
erik@greendragon.org

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