From: Ladislav Michl <ladis@linux-mips.org>
To: Jun Sun <jsun@mvista.com>
Cc: linux-mips@linux-mips.org
Subject: Re: memory for exception vectors
Date: Tue, 13 May 2003 10:51:45 +0100 [thread overview]
Message-ID: <20030513105145.D22288@ftp.linux-mips.org> (raw)
In-Reply-To: <20030512104408.C24045@mvista.com>; from jsun@mvista.com on Mon, May 12, 2003 at 10:44:08AM -0700
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?
ladis
next prev parent reply other threads:[~2003-05-13 9:51 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-05-12 10:56 memory for exception vectors Ladislav Michl
2003-05-12 17:44 ` Jun Sun
2003-05-13 9:51 ` Ladislav Michl [this message]
2003-05-13 16:52 ` Jun Sun
2003-05-13 17:11 ` Ladislav Michl
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