From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Sven Luther <sven.luther@wanadoo.fr>
Cc: Peter Bergner <bergner@vnet.ibm.com>,
linuxppc-dev list <linuxppc-dev@lists.linuxppc.org>
Subject: Re: chrp mmu and booting.
Date: Sat, 24 Jan 2004 12:08:19 +1100 [thread overview]
Message-ID: <1074906498.1262.52.camel@gaston> (raw)
In-Reply-To: <20040123185433.GB5125@iliana>
> Yeah, but in my case, i have no yaboot, and i know that these boxes are
> also capable of booting from the OF.
>
> But then, how comes the OF translate call is able to map the address 0
> to the 0x10000 address ?
If you are talking about non-IBM HW, then you can't rely on what happens
on IBM CHRP as a reference :) Any OF implementation does things differently
(and for example, Apple's one runs in virtual mode, not in real mode, thus
the translate call is useful in case you are loaded at a non-1:1 address).
What prom.c is expected to return is at what physical address the kernel
was loaded. If you have MMU off or 1:1 mapping, the reloc "offset" is
usually enough, but if OF have setup some kind of non-1:1 MMU mapping
then you need the translate call.
Ben.
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2004-01-24 1:08 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-01-23 11:17 chrp mmu and booting Sven Luther
2004-01-23 18:44 ` Peter Bergner
2004-01-23 18:54 ` Sven Luther
2004-01-23 20:49 ` Peter Bergner
2004-01-24 1:06 ` Benjamin Herrenschmidt
2004-01-24 20:01 ` Geert Uytterhoeven
2004-01-26 7:52 ` Segher Boessenkool
2004-01-24 1:08 ` Benjamin Herrenschmidt [this message]
2004-01-24 8:21 ` Sven Luther
2004-01-24 11:36 ` Benjamin Herrenschmidt
2004-01-26 7:51 ` Segher Boessenkool
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