From: Joerg Platte <lists@naasa.net>
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] SPARC iommu mapping
Date: Wed, 5 Apr 2006 17:23:17 +0200 [thread overview]
Message-ID: <200604051723.17846.lists@naasa.net> (raw)
In-Reply-To: <200604042127.55487.lists@naasa.net>
Am Dienstag, 4. April 2006 21:27 schrieb Joerg Platte:
Hi!
> To find this problem, I enabled debugging in the esp.c file and printed the
> mapped address (after iommu mapping). In some cases the mapped address is
> zero:
> ESP: DMA address 0beb8000
> ESP: DMA address 00000000
I didn't find a manual of the SBUS IOMMU. But if I understand the contents of
newer implementations of an IOMMU, each entry in this MMU table has a valid
bit. And therefore, a 0 entry is invalid. But the current implementation of
qemu's IOMMU does not check for a valid bit. Where can I find more
information on this topic? And is a besser IOMMU currently in development?
regards,
Jörg
next prev parent reply other threads:[~2006-04-05 15:23 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-04 19:27 [Qemu-devel] SPARC iommu mapping Joerg Platte
2006-04-05 15:23 ` Joerg Platte [this message]
2006-04-05 17:36 ` Blue Swirl
2006-04-05 18:14 ` Joerg Platte
2006-04-05 18:25 ` Joerg Platte
2006-04-05 20:03 ` Joerg Platte
2006-04-06 16:53 ` Joerg Platte
-- strict thread matches above, loose matches on Subject: below --
2006-04-07 15:44 Blue Swirl
2006-04-07 21:33 ` Joerg Platte
2006-04-09 16:31 ` Joerg Platte
2006-04-10 13:18 ` Joerg Platte
2006-04-11 19:21 ` Blue Swirl
2006-04-14 16:07 ` Joerg Platte
2006-04-17 8:49 ` Blue Swirl
2006-05-03 18:37 ` Joerg Platte
2006-05-03 18:52 ` Blue Swirl
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