Re: [microblaze-uclinux] memec v2p7 booting issue

[mcnernbm@xxxxxxxxxxxxxxxxx]

well glad to see I am not the only one
having this issue.  I wish I could say why it is doing this but I
have no idea.  I have tried many different methods but no luck yet.
 I am trying it today with all the recent drivers and I will give
the cachelink a try later today or first thing toamrrow and let you know
what happens.  I did notice that the cachelink is alot faster so it
would be nice if it would work.  On another note does anyone have
a working version of hardware and image file for the memec virtex II pro
v2p7f456 that they could post that I could try I jsut need to get something
to boot soon and then I can dedicate more time to trying to figure out
why the autoconfig is not working.
Thanks

Brett

John McGrath <john.mcgrath@xilinx.com>
Sent by: owner-microblaze-uclinux@itee.uq.edu.au

04/19/2005 07:11 AM

Please respond to
microblaze-uclinux@itee.uq.edu.au

To	microblaze-uclinux@itee.uq.edu.au
cc
Subject	Re: [microblaze-uclinux] memec v2p7 booting issue

It seems I am not the only one having this problem.
I read through some old emails on this mailing list, and someone mentioned
something about the romfs beginning exactly in the .bss section of the
image, and that the romfs is "moved" at boot time to another
location.
Have I misunderstood this?

If this is the case, then where exactly does it move it to? If it is not
being moved, perhaps there is a conflict with the romfs and the .bss section?

It seems to point to some problem with reading the romfs. The uclinux[mtd]
probe seems to find the filesystem ok (I dont know what it does to do this...)
but are thre any simple tests that I could include in the init/main.c to
test romfs readability before the hang I usually get? By hang I mean where
it is unable execute the first file in the romfs, around line 650 of init/main.c

Also, a few more curious points:

After the "hang", I have seen the console echo back characters
to me when typed. Does this indicate some life in the system?

Also, on some occasions, I have seen XMD report an error just at this hang
point, and print a handful or random characters to the screen. Is it possible
that uClinux is trying to use the debug uart as some kind on console? Shouldn't
it use the same uart (console_uart) that is has been using all the time
while booting?


Curious issues!!

p.s. a bit off-topic, but anyone tried the MicroBlaze version 4.0 with
cachelink, multichanel SDRAM controller and hard fpu with uClinux yet?
Is it blindingly fast? I've seen that (in theory - dont have a chip to
test it yet), a typical uclinux system, supporting all of the above, could
run about 150MHz on a V4 LX25-12. That's pretty fast!!!

Cheers,
John


mcnernbm@notes.udayton.edu
wrote:

Using the auto-config method I receive the following when I try to run
the build kernel: 

Calibrating delay loop... 32.97 BogoMIPS 
Memory: 16MB = 16MB total 
Memory: 15400KB available (601K code, 196K data, 32K init)
Dentry cache hash table entries: 2048 (order: 2, 16384 bytes)
Inode cache hash table entries: 1024 (order: 1, 8192 bytes)
Mount cache hash table entries: 512 (order: 0, 4096 bytes)
Buffer cache hash table entries: 1024 (order: 0, 4096 bytes)
Page-cache hash table entries: 4096 (order: 2, 16384 bytes)
POSIX conformance testing by UNIFIX 
Linux NET4.0 for Linux 2.4 
Based upon Swansea University Computer Society NET3.039
Microblaze UARTlite serial driver version 1.00 
ttyS0 at 0xffff2000 (irq = 1) is a Microblaze UARTlite
Starting kswapd 
xgpio #0 at 0xFFFF5000 mapped to 0xFFFF5000 
Xilinx GPIO registered 
RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize
uclinux[mtd]: RAM probe address=0x800c791c size=0x77000
uclinux[mtd]: root filesystem index=0 
VFS: Mounted root (romfs filesystem) readonly. 
Freeing init memory: 32K 
release_dev: driver.table[60] not tty for (04:40) 
Warning: unable to open an initial console. 
Kernel panic: No init found.  Try passing init= option to kernel.

I am not sure what to try I have already changed the mdm from flash to
the generic rom/ram setting. 
ANy help would be greatly appreciated also atached are the .mhs and .mss
files from the hardware.  I am also using EDK 7.1.


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