9:37 a.m.
#84: grub2 can boot linux from IDE disk
---------------------------------+------------------------------------------
Reporter: oxygene | Owner: oxygene
Type: enhancement | Status: new
Priority: major | Milestone: Port GRUB2 to LinuxBIOS
Component: code | Version: v3
Keywords: | Dependencies:
Patchstatus: there is no patch |
---------------------------------+------------------------------------------
Grub2 uses BIOS calls right now for access to disk. Replace this with a
driver that accesses ATA disks directly.
--
Ticket URL: <http://tracker.linuxbios.org/trac/LinuxBIOS/ticket/84>
LinuxBIOS <http://www.linuxbios.org/>
7:53 p.m.
New subject: [LinuxBIOS] #84: grub2 can boot linux from IDE disk
On Tue, Jul 10, 2007 at 07:37:34AM -0000, LinuxBIOS wrote:
Grub2 uses BIOS calls right now for access to disk.
Replace this
with a driver that accesses ATA disks directly.
_Please_ don't get the one from FILO.
Either grab the one from OpenBIOS or port either ADVDRVR or MINDRVR
written by Hale Landis, they're both in the public domain and
available from http://ata-atapi.com/
(How does this thing work to get trac to put emails as ticket
comments? trac docs anywhere?)
//Peter
9:06 p.m.
New subject: [LinuxBIOS] #84: grub2 can boot linux from IDE disk
On Thu, Jul 12, 2007 at 07:53:33PM +0200, Peter Stuge wrote:
On Tue, Jul 10, 2007 at 07:37:34AM -0000, LinuxBIOS
wrote:
Why not FILO's driver? Are those other two better in some respect? How/why?
I've seen lots of inline assembly in ADVDRVR upon a quick investigation.
Grub2 uses BIOS calls right now for access to
disk. Replace this
with a driver that accesses ATA disks directly.
_Please_ don't get the one from FILO.
Either grab the one from OpenBIOS or port either ADVDRVR or MINDRVR written by Hale Landis, they're both in the public
domain and
available from http://ata-atapi.com/
(How does this thing work to get trac to put emails as ticket
comments? trac docs anywhere?)
Doesn't work. It works the other way around, though. If you post
comments to the trac issue, they'll be (automatically) posted on the
list, too.
http://trac.edgewall.org/wiki/TracGuide
Uwe.
--
http://www.hermann-uwe.de | http://www.holsham-traders.de
http://www.crazy-hacks.org | http://www.unmaintained-free-software.org
9:52 p.m.
New subject: [LinuxBIOS] #84: grub2 can boot linux from IDE disk
On Thu, Jul 12, 2007 at 09:06:28PM +0200, Uwe Hermann wrote:
Why not FILO's driver?
Because it's a somewhat unreliable patchwork with lots of hacks.
(In a bad way.)
Grub2 uses BIOS calls right now for access to disk.
Replace
this with a driver that accesses ATA disks directly.
_Please_ don't get the one from FILO.
Either grab the one from OpenBIOS or port either ADVDRVR or
MINDRVR Are those other two better in some respect? How/why?
The OpenBIOS driver is very nice and neat, but not as featureful as
ADVDRVR which even does DMA.
I've seen lots of inline assembly in ADVDRVR upon
a quick
investigation.
Aha. Maybe MINDRVR is a better fit. It would be interesting to see a
feature comparison between the OpenBIOS driver and MINDRVR.
Thanks.
//Peter
10:19 p.m.
New subject: [LinuxBIOS] #84: grub2 can boot linux from IDE disk
Peter Stuge wrote:
The OpenBIOS driver is very nice and neat, but not as
featureful as
ADVDRVR which even does DMA.
I'm pretty much planning to use openbios'
(axboe's) driver. I also doubt
that DMA is useful in the boot environment, and I'd like to keep
complexity down.
Regards,
Patrick Georgi
1:49 a.m.
New subject: [LinuxBIOS] #84: grub2 can boot linux from IDE disk
On Thu, Jul 12, 2007 at 10:19:30PM +0200, Patrick Georgi wrote:
Peter Stuge wrote:
Are the grub2 fs drivers already written to do multiblock reads from
the block devices btw? This is pretty important as seen in FILO.
(Admittedly a design decision above the IDE driver.)
The OpenBIOS driver is very nice and neat, but
not as featureful
as ADVDRVR which even does DMA.
I'm pretty much planning to use openbios' (axboe's) driver. I also doubt that DMA is useful in the boot
environment, and I'd
like to keep complexity down.
I think DMA would be nice. It can make a difference already with a
few megabytes which isn't very uncommon for a complete kernel and
easily reached with a ramdisk or xen.
The complexity is indeed the tradeoff, but it has been suggested
that IDE DMA need not be all that complex.
Perhaps worthwhile to have a look at what MINDRVR does? 975 loc
//Peter
10:28 p.m.
New subject: [LinuxBIOS] #84: grub2 can boot linux from IDE disk
* Uwe Hermann <uwe(a)hermann-uwe.de> [070712 21:06]:
You might try sending to trac at linuxbios dot org. The email filter is
there but it's long since we installed it, no idea whether it works.
Stefan
--
coresystems GmbH • Brahmsstr. 16 • D-79104 Freiburg i. Br.
Tel.: +49 761 7668825 • Fax: +49 761 7664613
Email: info(a)coresystems.de • http://www.coresystems.de/
(How does this
thing work to get trac to put emails as ticket
comments? trac docs anywhere?)
Doesn't work. It works the other way around, though. If you post
comments to the trac issue, they'll be (automatically) posted on the
list, too.
8 p.m.
New subject: [LinuxBIOS] #84: grub2 can boot linux from IDE disk
#84: grub2 can boot linux from IDE disk
----------------------------+-----------------------------------------------
Reporter: oxygene | Owner: oxygene
Type: enhancement | Status: closed
Priority: major | Milestone: Port GRUB2 to LinuxBIOS
Component: code | Version: v3
Resolution: fixed | Keywords:
Dependencies: | Patchstatus: patch needs review
----------------------------+-----------------------------------------------
Changes (by oxygene):
* status: new => closed
* patchstatus: there is no patch => patch needs review
* resolution: => fixed
Comment:
contained in lbgrub2 patch, using code from openbios (unclear licensing,
gpl2 vs. gpl3!)
see http://openbios.org/~oxygene/patch-20070820-2-lbgrub2-genesis-patch
and http://openbios.org/~oxygene/lbgrub2-20070820-1.tar.bz2
--
Ticket URL: <http://tracker.linuxbios.org/trac/LinuxBIOS/ticket/84#comment:1>
LinuxBIOS <http://www.linuxbios.org/>
4612
days inactive
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8 comments
5 participants
participants (5)
-
LinuxBIOS -
Patrick Georgi -
Peter Stuge -
Stefan Reinauer -
Uwe Hermann