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Re: memory for exception vectors

To: Jun Sun <>
Subject: Re: memory for exception vectors
From: Ladislav Michl <>
Date: Tue, 13 May 2003 10:51:45 +0100
In-reply-to: <>; from on Mon, May 12, 2003 at 10:44:08AM -0700
Original-recipient: rfc822;
References: <> <>
User-agent: Mutt/
On Mon, May 12, 2003 at 10:44:08AM -0700, Jun Sun wrote:
> On Mon, May 12, 2003 at 11:56:41AM +0100, Ladislav Michl wrote:
> > Could anyone tell me where is space for exception vectors reserved? Many 
> > boards
> > (for example Alchemy Pb1000, Galileo EV96100 or Galileo EV64120A) simply
> > registers all available RAM with add_memory_region call, but I didn't find 
> > code
> > which reserves first 0x200 (on most CPUs) for exceptions vectors anywhere. 
> > I'd
> > guess there is something obvious what I'm missing. Can you help me to see 
> > it?
> Kernel only uses memory after the end of kernel image.  In that sense, all
> memory before LOADADDR (see arch/mips/Makefile) is reserved.

I'm afraid, I didn't find any code which does what you're describing here.
But in arch/mips/mm/init.c is function setup_zero_pages which allocates
first (or first eight if CPU has VCE) page(s). Does it do the trick?


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