linux on powerpc booting problem

[sumeshkkn]

Hi folks,

i am trying to port linux on the Virtex IIpro XUP board from Xilinx.

i am using ppc405

i downloaded the linux source from git.xilinx.com,setup the cross compiler and finally i could get a zImage in my hand. i am using device tree - fdt.dts - which is generated by the EDK10.1 and i copied this to kernel source..



i downloaded the bit file to the fpga , and using xmd i downloaded the zImage to DDR SDRAM. when i run , i get the following lines on the tty:



booting virtex
memstart=0x0
memsize=0x10000000
zImage starting: loaded at 0x00400000 (sp: 0x00578f1c)
Allocating 0x326564 bytes for kernel ...
gunzipping (0x00000000 <- 0x0040c000:0x005772bb)...done 0x3015c8 bytes
Linux/PowerPC load: console=ttyS0 ip=on root=/dev/ram
Finalizing device tree... flat tree at 0x40ad68



It doesnt proceed after the above line. anyone has any idea what could be the problem





thanks,

Sumesh

[ndevel]

Hi,
I also do some linux+ppc development and I remember to booting
problems mainly to dead console.

Few things/questions come to my mind.
1. just for info what kind of bootloader do you use (uboot in my case)?

2. do you use correct device for console? I mean did you try also another
devices like ttyS1...?

3. This question might be strange but when you get dead console does the
machine automatically reboot after some time? If yes then maybe you have
you have just specified bad device.

Regards,
ndevel.

[sumeshkkn]

Hi,
thanks for the reply.
i am not using any bootloader, but use xmd to download the zImage to the SDRAM. im getting output from the bootwrapper part of the image, but not from the vmlinuz(x) part.
i have only one console, ie, ttyS0. kernel boot arguments(in menuconfig) for the console has been given with the baud rate 9600(same as my device).

the machine is not rebooting,but stuck at some point..

i am using custom device tree file for the kernel. the dts file is attached..

thanks,
Sumesh.

[ndevel]

I still think that there is just something wrong with boot console but I can be wrong.
I found the following link regarding booting so maybe would check this:

Fix booting of Xilinx FPGAs with 16550 for 405 and 440

regards,
ndevel.

[sumeshkkn]

YUP..!!! my system is up, but....
the problem was with the EDK. EDK10.1 is not supported xup design directly..
when i tried the same design with 9.1 it worked fine..

No i got up to the shell. but no response from the shell do u have any idea on this..??!!

bootlog as follows:

reeing initrd memory: 1471k freed
msgmni has been set to 503
io scheduler noop registered
io scheduler anticipatory registered
io scheduler deadline registered
io scheduler cfq registered (default)
Generic non-volatile memory driver v1.1
40600000.serial: ttyUL0 at MMIO 0x40600003 (irq = 16) is a uartlite
brd: module loaded
loop: module loaded
mice: PS/2 mouse device common for all mice
i2c /dev entries driver
RAMDISK: Compressed image found at block 0
VFS: Mounted root (ext2 filesystem) readonly.
Freeing unused kernel memory
ifconfig: socket: Function not implemented
/etc/mtab: cannot create
### Application running ...
root:~>

[ndevel]

If I understand you well then you can't get shell prompt on console but can you login
via telnet?
Anyway excerpt from your post this looks like a prompt shell:

### Application running ...
root:~>