From: zitu <zitu@free.fr>
To: Juergen Keil <jk@tools.de>, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] enabling bus-master IDE driver
Date: Fri, 5 Nov 2004 16:43:24 +0100 [thread overview]
Message-ID: <1099669404.418b9f9c613ef@imp5-q.free.fr> (raw)
In-Reply-To: <200411051537.iA5Fb6Y3013972@tiger2.tools.intra>
Quoting Juergen Keil <jk@tools.de>:
> > WIN_WRITEDMA_EXT & WIN_READDMA_EXT cases are not defined in hw/ide.c
>
> Aha, and Windows uses these commands, on small HDDs <= 128GB ?
Apparently no... I realized after I wrote this email that WIN_WRITEDMA
should be the right command to invoke,
>
>
> > I have no idea where to start to write a patch for these... :(
> >
> > Until these and the atapi_dma are set/defined, no dma should work IMHO.
> > And this seems not to be OS dependant.
> >
> > Which means the linux figures I got were wrong ???
>
> The *_EXT versions are apparently for HDDs with capacities >128GB, these
> need 48-bit LBA addresses to access the HDD space over the 128GB mark.
>
> I guess that Solaris/Linux uses the commands with the smaller 28-bit
> LBA disk addresses for small disks with capacities <= 128GB.
>
> An interesting experiment would be to setup a QEMU HDD image > 128GB,
> then try Solaris x86/Linux with such a big disk and check if it still
> works. Probably not.
>
>
>
> _______________________________________________
> Qemu-devel mailing list
> Qemu-devel@nongnu.org
> http://lists.nongnu.org/mailman/listinfo/qemu-devel
>
--
next prev parent reply other threads:[~2004-11-05 15:52 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-11-05 15:37 [Qemu-devel] enabling bus-master IDE driver Juergen Keil
2004-11-05 15:43 ` zitu [this message]
2004-11-05 15:45 ` zitu
2004-11-05 15:52 ` Jens Axboe
2004-11-05 16:10 ` zitu
2004-11-05 17:30 ` Damien Mascord
-- strict thread matches above, loose matches on Subject: below --
2004-11-26 10:48 Juergen Keil
2004-11-28 20:09 ` Juergen Lock
2004-11-12 19:07 Juergen Keil
2004-11-16 19:41 ` Juergen Lock
2004-11-23 5:12 ` Norikatsu Shigemura
2004-11-25 21:12 ` Juergen Lock
2004-11-12 14:27 Juergen Keil
2004-11-12 18:02 ` Jason Brittain
2004-11-04 20:35 Simon Frew
2004-11-05 13:32 ` zitu
2004-11-05 15:02 ` zitu
2004-11-06 1:53 ` Jason Brittain
2004-11-06 14:27 ` Johannes Schindelin
2004-11-06 21:52 ` Jason Brittain
2004-11-07 9:03 ` Jens Axboe
2004-11-07 9:21 ` Jens Axboe
2004-11-07 9:38 ` Jens Axboe
2004-11-07 11:01 ` Hetz Ben Hamo
2004-11-07 11:16 ` Jens Axboe
2004-11-08 10:15 ` zitu
2004-11-08 16:51 ` Andreas Bollhalder
2004-11-09 7:38 ` Paul Jakma
2004-11-09 10:28 ` Hetz Ben Hamo
2004-11-09 13:53 ` Paul Jakma
2004-11-11 17:29 ` Jason Brittain
2004-11-11 19:06 ` Jens Axboe
2004-11-11 19:02 ` Jason Brittain
2004-11-11 19:16 ` Jens Axboe
2004-11-12 8:42 ` Jens Axboe
2004-11-07 11:02 ` James Boddington
2004-11-10 1:41 ` James Boddington
2004-11-06 21:57 ` James Boddington
2004-11-06 22:11 ` James Boddington
2004-11-06 23:46 ` zitu
2004-11-07 0:41 ` jeebs
2004-11-07 7:12 ` Jason Brittain
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