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[Qemu-devel] I got a kernel booted under qemu-system-ppc !
From: |
Rob Landley |
Subject: |
[Qemu-devel] I got a kernel booted under qemu-system-ppc ! |
Date: |
Thu, 18 Oct 2007 19:12:57 -0500 |
User-agent: |
KMail/1.9.6 |
The easy way to reproduce this is go to "http://landley.net/hg/firmware",
download tip, and "./build.sh powerpc". When it finishes building
everything, cd build and "./run-powerpc.sh".
What I did is build a new ppc_rom.bin (attached, source code is at
http://landley.net/hg/firmware/raw-diff/92f89c9c9495/sources/toys/make-ppc_rom.tar.bz2
)
which was written by Milton Miller. I use that firmware as the boot rom
(point -L at the directory it's in) instead of Open Hackware, which still
doesn't work for me.
Then I build a 2.6.23 kernel with this patch:
http://landley.net/hg/firmware/raw-diff/fdb6ddd4c3b7/sources/patches/linux-ppcqemu.patch
which adds a "qemu" target.
I then boot with the following command line (modulo wordwrap damage):
qemu-system-ppc -M prep -nographic -hda image-powerpc.ext2 -kernel
zImage-powerpc -append 'rw init=/tools/bin/sh panic=1 PATH=/tools/bin
root=/dev/hda console=ttyS0' -L ../sources/toys
And I get a shell prompt inside qemu! (After almost _two_years_ of trying,
I'm kind of happy about this.)
The downside is that the result boots fine under qemu-0.9.0, but is broken
with current cvs. I tracked it down to the specific patch with "git bisect",
and it's this one:
http://git.kernel.dk/?p=qemu.git;a=commit;h=36f447f730f61ac413c5b1c4a512781f5dea0c94
author j_mayer <j_mayer>
Mon, 9 Apr 2007 22:45:36 +0000 (22:45 +0000)
committer j_mayer <j_mayer>
Mon, 9 Apr 2007 22:45:36 +0000 (22:45 +0000)
Implement embedded IRQ controller for PowerPC 6xx/740 & 750.
Fix PowerPC external interrupt input handling and lowering.
Fix OpenPIC output pins management.
Fix multiples bugs in OpenPIC IRQ management.
Fix OpenPIC CPU(s) reset function.
Fix Mac99 machine to properly route OpenPIC outputs to the PowerPC input
pins.
Fix PREP machine to properly route i8259 output to the PowerPC external
interrupt pin.
Versions before that patch went in work fine. Versions since then hang
halfway through IDE controller initialization:
Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
hda: QEMU HARDDISK, ATA DISK drive
hda: IRQ probe failed (0x0)
hdb: IRQ probe failed (0x0)
hdb: IRQ probe failed (0x0)
hdb: QEMU CD-ROM, ATAPI CD/DVD-ROM drive
hdb: IRQ probe failed (0x0)
<-- hangs here with the patch
ide0 at 0x1f0-0x1f7,0x3f6 on irq 13
hda: max request size: 512KiB
hda: 4194304 sectors (2147 MB) w/256KiB Cache, CHS=4161/255/63
hda: set_multmode: status=0x41 { DriveReady Error }
hda: set_multmode: error=0x04 { DriveStatusError }
ide: failed opcode was: 0xef
hda: cache flushes supported
hda: unknown partition table
mice: PS/2 mouse device common for all mice
Rob
--
"One of my most productive days was throwing away 1000 lines of code."
- Ken Thompson.
ppc_rom.bin
Description: Binary data
- [Qemu-devel] I got a kernel booted under qemu-system-ppc !,
Rob Landley <=