Re: [Qemu-devel] Is it possible to boot qemu-system-ppc with -kernel?

[Jason Wessel <jason.wessel@windriver.com>]

To boot the prep machine you need to configure the kernel for prep and 
use the zImage.prep file.  IE: CONFIG_PPC_PREP=y

Right now you selected CONFIG_PPC_CHRP

In any kernel > 2.6.20 there is a bug where no PCI interrupts go to 
sleep and the default prep loader has a size limit.

I worked around this by modifying the prep loader to accept a bigger 
image, as well as to process the kernel arguments passed by QEMU.  So 
yes it is definitely possible to boot a prep image, but there some 
tricks.  I also only use the serial ports, so I am not certain if the 
frame buffer actually works.

Jason.

Rob Landley wrote:
> I've been trying several variants of:
>
>   qemu-system-ppc -M prep -nographic -hda "ext2.img" -kernel "zImage" \
>     -append "rw init=/tools/bin/sh panic=1 PATH=/tools/bin root=/dev/hda
>              console=/dev/ttyS0"
>
> My miniconfig is attached.  (You can make a full-sized .config out of it with
> "make allnoconfig KCONFIG_ALLSYMS=miniconfig-linux", I still need to get the 
> miniconfig patch in so there's a better UI.)  I'm trying to boot the zImage 
> file that produces.
>
> Unfortunately, I've never managed to boot a ppc kernel under qemu 
> with -kernel.  I've got to be doing something wrong, but I don't know what it 
> is.  Could you offer any hints?
>
> Here's the output I get:
>
>   
>> Could not configure '/dev/rtc' to have a 1024 Hz timer. This is not a fatal
>> error, but for better emulation accuracy either use a 2.6 host Linux kernel
>> or type 'echo 1024 > /proc/sys/dev/rtc/max-user-freq' as root.
>> init_ppc_proc: PVR 00040000 mask ffffffff => 00040000
>> register PCI host 'pci-bridge' 'pci' '<null>' 'PREP Host PCI Bridge -
>> Motorola Raven' register 'pci-bridge' 'pci' '<null>' 'PREP Host PCI Bridge
>> - Motorola Raven' 0x80000000 in 'device-tree' 0xffffffff Done 582b000
>> 582b880
>> PCI device '<null>' 0 11 0 has no reg properties:
>> PCI device '<null>' 0 11 0 has no assigned addresses properties:
>> register pci device 'Qemu VGA' 0000000c 'display' 'VGA' 'Qemu VGA'
>> register 'Qemu VGA' 'display' 'VGA' 'Qemu VGA' 0x0000000c in 'pci-bridge'
>> 0x80000000 Done 582b880 582b980
>> PCI device 'Qemu VGA' 0 12 0 reg properties:
>>   addr: 82006010 00000000 f0000000 size: 00000000 00800000
>> PCI device 'Qemu VGA' 0 12 0 assigned addresses properties:
>>   addr: 82006010 00000000 f0000000 size: 00000000 00800000
>> PPC Open Hack'Ware BIOS for qemu version 0.4.1
>> Build 2005-07-06 23:10:57
>> Copyright 2003-2005 Jocelyn Mayer
>>
>> Memory size: 144 MB.
>> Booting from device m
>> ide0: drive 0: Hard Disk
>> ERROR: OF_property_copy cannot get property 'hd' for aliases
>> ide0: drive 1: CD-ROM
>> ERROR: OF_property_copy cannot get property 'cd' for aliases
>> ERROR: ATAPI TEST_UNIT_READY : status 41 != 0x40
>> ide1: drive 0: none
>> ide1: drive 1: none
>> Probe partitions for device c
>> ERROR: No MSDOS signature (0 0 0 0)
>> Boot partition: 0 9401fff8 9401fff8 0
>> Probe partitions for device m
>> ERROR: No MSDOS signature (38 0 0 0)
>> Use bloc device as raw partition
>> Boot partition: 0 9401fff8 9401fff8 0
>> ERROR: OF_property_copy cannot get property 'alias' for <null>
>> boot device: 5833180 image 1000000 size 1106232
>> ERROR: No MSDOS signature (7f 45 0 0)
>> Use bloc device as raw partition
>> Boot partition: 0 9401fff8 9401fff8 0
>> boot device: 5833180
>> ERROR: Found no boot partition!
>> ERROR: BUG caught...
>> BIOS execution exception
>> nip=0x05800000 msr=0x00002000 dar=0x00000000 dsisr=0x00000000
>> Stopping execution
>>     
>
> It's not getting _to_ the kernel.  (I tried booting vmlinux instead of 
> bzImage, but it made no difference.)
>
> Thanks,
>
> Rob
>   
> ------------------------------------------------------------------------
>
> CONFIG_PPC_CHRP=y
> CONFIG_SWAP=y
> CONFIG_IKCONFIG=y
> CONFIG_IKCONFIG_PROC=y
> CONFIG_LSF=y
> CONFIG_BINFMT_ELF=y
> CONFIG_PM=y
> CONFIG_NET=y
> CONFIG_PACKET=y
> CONFIG_UNIX=y
> CONFIG_INET=y
> CONFIG_BLK_DEV_LOOP=y
> CONFIG_IDE=y
> CONFIG_BLK_DEV_IDE=y
> CONFIG_BLK_DEV_IDEDISK=y
> CONFIG_IDE_GENERIC=y
> CONFIG_BLK_DEV_IDEPCI=y
> CONFIG_BLK_DEV_GENERIC=y
> CONFIG_NETDEVICES=y
> CONFIG_NET_ETHERNET=y
> CONFIG_NET_PCI=y
> CONFIG_NE2K_PCI=y
> CONFIG_SERIAL_8250=y
> CONFIG_SERIAL_8250_CONSOLE=y
> CONFIG_EXT2_FS=y
> CONFIG_EXT3_FS=y
> CONFIG_SQUASHFS=y
>   


-- 
Jason Wessel, SMTS Linux Products, Wind River direct +1.630.971.6420
mobile +1.630.715.4615 fax +1.630.971.6433