From: Ralf Baechle <ralf@linux-mips.org>
To: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: linux-mips@linux-mips.org
Subject: Re: [PATCH] IP28 support
Date: Thu, 29 Nov 2007 12:15:57 +0000 [thread overview]
Message-ID: <20071129121557.GA10522@linux-mips.org> (raw)
In-Reply-To: <20071129095844.GA9106@alpha.franken.de>
On Thu, Nov 29, 2007 at 10:58:44AM +0100, Thomas Bogendoerfer wrote:
> I've changed that in the updated IP28 patch. I don't see a way to
> support ISA busmaster devices, because they will generate a physical
> address between 0 and 0x1000000, which will only hit the 512 KB
> mirrored RAM. Anything which uses ISA slave DMA is able to address
> the full 32bit address space.
Those 512kB could be used as a fairly claustrophobic ZONE_DMA. Not
pretty though.
Ralf
prev parent reply other threads:[~2007-11-29 12:16 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-26 22:40 [PATCH] IP28 support Thomas Bogendoerfer
2007-11-28 1:33 ` peter fuerst
2007-11-29 10:01 ` Thomas Bogendoerfer
2007-11-28 14:34 ` Ralf Baechle
2007-11-29 9:58 ` Thomas Bogendoerfer
2007-11-29 12:15 ` Ralf Baechle [this message]
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