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Re: [PATCH] Highmem detection for Indigo2

To: Ladislav Michl <ladis@linux-mips.org>
Subject: Re: [PATCH] Highmem detection for Indigo2
From: Keith M Wesolowski <wesolows@foobazco.org>
Date: Wed, 7 May 2003 23:11:17 -0700
Cc: linux-mips@linux-mips.org
In-reply-to: <20030428071639.GA7578@simek>
Original-recipient: rfc822;linux-mips@linux-mips.org
References: <20030428071639.GA7578@simek>
Sender: linux-mips-bounce@linux-mips.org
User-agent: Mutt/1.5.4i
On Mon, Apr 28, 2003 at 09:16:39AM +0200, Ladislav Michl wrote:

> Following patch builds whole RAM map based of MC's memory configuration
> registers, does some samity checks adds high system memory (if any) to
> bootmem.

> +static void init_bootmem(void)
...
> +     init_bootmem();

This is a pretty unfortunate choice of names for this function.  See
mm/bootmem.c.

Other than that, your patch works fine for me; my Indy has 192MB
memory and it's detected properly.  I do get an oops in do_be from
xdm, but I get that without the patch also.

Determined physical RAM map:
 memory: 00001000 @ 00000000 (reserved)
 memory: 00001000 @ 00001000 (reserved)
 memory: 001e1000 @ 08002000 (reserved)
 memory: 0055d000 @ 081e3000 (usable)
 memory: 000c0000 @ 08740000 (ROM data)
 memory: 0b800000 @ 08800000 (usable)

I need to do the same kind of thing for ip32 as the ARC memory
detection has the same shortcoming on that platform.  No sense having
a machine support 1GB memory and only looking for 256MB of it,
especially in a 64-bit kernel.  ARC[S] really does seem to be useless.

-- 
Keith M Wesolowski <wesolows@foobazco.org> http://foobazco.org/~wesolows
------(( Project Foobazco Coordinator and Network Administrator ))------
        "May Buddha bless all stubborn people!"
                                -- Uliassutai Karakorum Blake

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