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Re: [Qemu-devel] enabling bus-master IDE driver
From: |
zitu |
Subject: |
Re: [Qemu-devel] enabling bus-master IDE driver |
Date: |
Fri, 5 Nov 2004 16:43:24 +0100 |
User-agent: |
Internet Messaging Program (IMP) 3.2.5 |
Quoting Juergen Keil <address@hidden>:
> > 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
> address@hidden
> http://lists.nongnu.org/mailman/listinfo/qemu-devel
>
--
- Re: [Qemu-devel] enabling bus-master IDE driver, (continued)
- Re: [Qemu-devel] enabling bus-master IDE driver, Jason Brittain, 2004/11/11
- Re: [Qemu-devel] enabling bus-master IDE driver, Jens Axboe, 2004/11/11
- Re: [Qemu-devel] enabling bus-master IDE driver, Jason Brittain, 2004/11/11
- Re: [Qemu-devel] enabling bus-master IDE driver, Jens Axboe, 2004/11/11
- Re: [Qemu-devel] enabling bus-master IDE driver, Jens Axboe, 2004/11/12
- Re: [Qemu-devel] enabling bus-master IDE driver, James Boddington, 2004/11/07
- Re: [Qemu-devel] enabling bus-master IDE driver, James Boddington, 2004/11/09
Re: [Qemu-devel] enabling bus-master IDE driver, Juergen Keil, 2004/11/05
Re: [Qemu-devel] enabling bus-master IDE driver, Juergen Keil, 2004/11/12
Re: [Qemu-devel] enabling bus-master IDE driver, Juergen Keil, 2004/11/12