From: Dan Malek <dan@embeddedalley.com>
To: Kalle Pokki <kalle.pokki@iki.fi>
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: CPM2 early console
Date: Tue, 27 Sep 2005 12:39:54 -0400 [thread overview]
Message-ID: <384d09b865d454875c447cc02c89d001@embeddedalley.com> (raw)
In-Reply-To: <43395322.1080407@iki.fi>
On Sep 27, 2005, at 10:11 AM, Kalle Pokki wrote:
> Is the alloc_bootmem() function in e.g. cpm_uart_allocbuf() supposed
> to give non-cached memory? In my 8248 board it seems not to.
It provides cache coherent memory, whether it is cached or not
depends upon the capabilities of the cache controller and
peripherals. On the 82xx, it is supposed to be cached.
> Only using DPRAM as buffer storage allows booting to proceed without
> hanging right in the beginning.
The only thing that would cause a problem is an
incorrect CPM configuration.
> Any ideas what can set the bootmem memory as cached?
All of memory is always cached on 82xx. Which is fine
since the cache controller keeps the processor core
and peripherals coherent in hardware.
Thanks.
-- Dan
next prev parent reply other threads:[~2005-09-27 16:58 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-22 16:02 CPM2 early console Rune Torgersen
2005-09-22 16:05 ` Kumar Gala
2005-09-23 10:55 ` Kalle Pokki
2005-09-27 14:11 ` Kalle Pokki
2005-09-27 16:39 ` Dan Malek [this message]
2005-09-27 20:35 ` Kalle Pokki
2005-09-27 20:48 ` Dan Malek
2005-09-28 10:20 ` Kalle Pokki
2005-09-29 12:24 ` Kalle Pokki
2005-09-29 12:50 ` Dan Malek
2005-09-30 13:22 ` Alex Zeffertt
2005-09-30 13:42 ` Alex Zeffertt
2005-09-30 20:16 ` Kalle Pokki
2005-09-30 13:58 ` Dan Malek
2005-09-30 20:10 ` Kalle Pokki
2005-09-30 20:28 ` Dan Malek
2005-10-01 5:57 ` Kalle Pokki
2005-10-01 8:24 ` Roger Larsson
2005-10-02 16:59 ` Dan Malek
2005-10-03 7:04 ` Kalle Pokki
2005-10-04 8:13 ` Kalle Pokki
2005-10-04 9:59 ` Alex Zeffertt
2005-10-04 10:16 ` Kalle Pokki
2005-10-04 16:04 ` Dan Malek
-- strict thread matches above, loose matches on Subject: below --
2005-09-22 13:11 Kalle Pokki
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