From: Benjamin Herrenschmidt <bh40@calva.net>
To: Michael Schmitz <schmitz@opal.biophys.uni-duesseldorf.de>,
linuxppc-dev@lists.linuxppc.org
Subject: Re: Booting 2.3.48 (devel) kernel problems?
Date: Wed, 8 Mar 2000 15:19:46 +0100 [thread overview]
Message-ID: <20000308151946.024345@mailhost.mipsys.com> (raw)
On Wed, Mar 8, 2000, Michael Schmitz
<schmitz@opal.biophys.uni-duesseldorf.de> wrote:
>So the framebuffer got mapped from OF but not from BootX.
I think it worked with OF because we inherit from OF SDR1 and, by luck,
OF page tables are high enough in memory to not have been damaged by the
kernel. When booting via BootX, that's not the case.
We should not try to access the framebuffer from identify_machine() and
MMU_Init() unless it was mapped with a BAT in head.S (for debugging
purposes). In normal cases, it will get mapped via map_bootx_text called
from setup_arch() and can be used beyond that point.
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
next reply other threads:[~2000-03-08 14:19 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-03-08 14:19 Benjamin Herrenschmidt [this message]
2000-03-08 15:27 ` Booting 2.3.48 (devel) kernel problems? enneper
2000-03-08 15:41 ` Michael Schmitz
-- strict thread matches above, loose matches on Subject: below --
2000-03-08 3:51 Robert Shaw
2000-03-08 7:25 ` enneper
2000-03-08 10:10 ` Michael Schmitz
2000-03-08 12:34 ` enneper
2000-03-08 13:14 ` Michael Schmitz
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