From: "David Müller (ELSOFT AG)" <d.mueller@elsoft.ch>
To: Adrian Cox <adrian@humboldt.co.uk>
Cc: linuxppc-dev@lists.linuxppc.org
Subject: Re: ISA DMA
Date: Thu, 20 Dec 2001 09:36:17 +0100 [thread overview]
Message-ID: <3C21A301.2080204@elsoft.ch> (raw)
In-Reply-To: 3C206A41.1080501@humboldt.co.uk
Hi
Seems like you are facing the same problem as i do. But IIRC i think you
have to adjust the code in include/asm/dma.h (and possibly other places)
as well (at least in 2.4.14, not sure about the later kernels).
BTW:
What south bridge do you use? Some of the newer ones offer 32bit
addressing capability for DMA.
Adrian Cox wrote:
> The current 2.4-devel tree never assigns any memory to the ISA DMA zone,
> irrespective of the setting of ISA_DMA_THRESHOLD. As I'm currently
> trying to get a floppy working on a platform with 24-bit ISA DMA in its
> Southbridge, this looks like a problem.
>
> How do people feel about the attached patch? This should only change
> behavior for platforms which set ISA_DMA_THRESHOLD to a value other than
> 0 or (-1)L.
>
[stuff deleted]
Dave
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2001-12-20 8:36 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-12-19 10:21 ISA DMA Adrian Cox
2001-12-20 8:36 ` David Müller (ELSOFT AG) [this message]
2001-12-20 9:50 ` Adrian Cox
2001-12-20 10:09 ` Geert Uytterhoeven
-- strict thread matches above, loose matches on Subject: below --
2001-12-20 16:42 Michael Sokolov
2004-09-08 21:28 Pierre Ossman
2004-09-08 22:27 ` Alan Cox
2004-09-09 15:14 ` Pierre Ossman
2004-09-08 22:54 ` Tommy Reynolds
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