From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Peter Bergner <bergner@vnet.ibm.com>
Cc: Sven Luther <sven.luther@wanadoo.fr>,
linuxppc-dev list <linuxppc-dev@lists.linuxppc.org>
Subject: Re: chrp mmu and booting.
Date: Sat, 24 Jan 2004 12:06:21 +1100 [thread overview]
Message-ID: <1074906380.814.49.camel@gaston> (raw)
In-Reply-To: <1074890984.2840.25.camel@otta.rchland.ibm.com>
On Sat, 2004-01-24 at 07:49, Peter Bergner wrote:
> In real mode, there is no address mapping done. When the kernel starts
> executing, we are not loaded where we were linked at, so we must be very
> careful about what we touch. You'll see in arch/ppc64/kernel/prom.c,
> that we use the RELOC() macro to access global data. It essentially
> maps the virtual/effective address the kernel expects things to be at
> to the physical address it's actually loaded at. The ppc32 kernel was
> able to remove the RELOC() macro, but for various reasons, the PPC64
> kernel is still stuck using it.
Yup :( Anton, Paulus and I have been scratching our heads to find
a way to kill it, not as simple as ppc32 but we'll eventually do it :)
Ben.
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2004-01-24 1:06 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 [this message]
2004-01-24 20:01 ` Geert Uytterhoeven
2004-01-26 7:52 ` Segher Boessenkool
2004-01-24 1:08 ` Benjamin Herrenschmidt
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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