[OpenBIOS] [PATCH][RFC] mac-io IDE support
aurelien at aurel32.net
Sun Jan 18 18:58:18 CET 2009
On Sun, Jan 18, 2009 at 06:21:37PM +0100, Aurelien Jarno wrote:
> On Sun, Jan 18, 2009 at 01:42:21AM +0100, Laurent Vivier wrote:
> > Le 18 janv. 09 à 00:37, Aurelien Jarno a écrit :
> >> On Fri, Jan 16, 2009 at 06:27:16PM +0100, Laurent Vivier wrote:
> >>> Hi,
> >>> this patch adds the mac-io IDE support to openBIOS. It works well
> >>> with
> >>> openBIOS (to load kernel) and with kernel 2.4 but has some problems
> >>> with
> >>> linux 2.6.
> >>> For instance, using debian-31r8-powerpc-netinst.iso with kernel 2.4
> >>> works well (but not kernel 2.6), but using debian-40r6-powerpc-
> >>> netinst.iso fails when debian-installer loads all udeb components.
> >>> Is there a bug in qemu, linux or the mac-io IDE device tree is not
> >>> initialized correctly ?
> >> I have tried your patch on already installed disk image, and it works
> >> without problem. I tried Debian etch (kernel 2.6.18), etchnhalf
> >> (kernel
> >> 2.6.24) and lenny (kernel 2.6.26).
> > Thank you to have tested this.
> >> I haven't done any change on the qemu side. Given that the mac-io ide
> >> is
> >> detected before the CMD646, I have to pass -hdc to the disk image so
> >> that it is recognized as -hda by Linux. I'll do test with the
> >> different
> >> install CD tomorrow.
> > I use "-drive file=new_disk.qcow2,bus=1,unit=0 -drive file=debian-40r6-
> > netinst.iso,bus=1,unit=1,media=cdrom"
> > and boot with "boot ide2:"
> > Try to install debian on the disk using these parameters. It fails every
> > time for me when debian-installer loads its udeb.
> I am able to reproduce the problem here when installing from the CD-ROM.
> debian-installer says: "bad md5sum".
> If I use the netboot install (kernel + initrd), debian-installer is
> working perfectly, so the problem seems related to the CD-ROM only.
Looking more closely, it looks like the DMA ports are not mapped (both
in QEMU and in OpenBIOS), which disables DMA:
[ 3.663184] ide0 at 0xca078000-0xca078070,0xca078160 on irq 19
[ 2.687286] ide0: DMA disabled
It is not impossible that the ATAPI emulation is buggy in non DMA mode.
I am looking at what to do on the QEMU side to enable DMA.
.''`. Aurelien Jarno | GPG: 1024D/F1BCDB73
: :' : Debian developer | Electrical Engineer
`. `' aurel32 at debian.org | aurelien at aurel32.net
`- people.debian.org/~aurel32 | www.aurel32.net
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