Re: How to load kernel on RPX Lite Board ?

Thank you so much.

I used zsrec utility to build S-Record image.  Wonderful. It works!

screen shot is as follows,

================================================================
loaded at:     00200000 0020B1F4RAM : <8DDF522D>     : 8DDF52DC*
relocated to:  00100000 0010B1F4firmware chksum   O  On-board I/
board data at: 001001C4 001001E0): OK

relocated to:  00200100 0020011C  Program FLASH  : <vmlinux.srec
zimage at:     00206000 0022DF78
Linux/PPC load:
Uncompressing Linux...done.
Now booting the kernel
Linux version 2.2.13 (root@enisei.postech.ac.kr) (gcc version 2.95.2 19991024 (r
elease)) #1 Thu May 25 15:56:27 KST 2000
Boot arguments: root=/dev/nfs rw
time_init: decrementer frequency = 180000000/60
Calibrating delay loop... 47.82 BogoMIPS
remove_mem_piece: bad overlap [7a000,a6000) with [7b000, 1000000)
Memory: 15720k available (304k kernel code, 344k data, 16k init) [c0000000,c1000
000]
DENTRY hash table entries: 262144 (order: 9, 2097152 bytes)
Buffer-cache hash table entries: 32768 (order: 5, 131072 bytes)
Page-cache hash table entries: 4096 (order: 2, 16384 bytes)
POSIX conformance testing by UNIFIX
Linux NET4.0 for Linux 2.2
Based upon Swansea University Computer Society NET3.039
Starting kswapd v 1.5
CPM UART driver version 0.03
ttyS00 at 0x0280 is a SMC
ttyS01 at 0x0380 is a SMC
VFS: Cannot open root device 00:00
Kernel panic: VFS: Unable to mount root fs on 00:00
Rebooting in 180 seconds..
====================================================================


Could you telll me what's difference between powerpc-linux-objcopy and zsrec?
Can we burn this S-record file into flash memory insead of loading into memory?
Some changes needed, doesn't it?

what is next step?
I read LDP(Linux Documentation Project). There are many choices to mount root file system. NFS, initrd, ..? I really want to know how to mount root file system.

Thank you for your help.




----- Original Message -----
From: "Rodney Davies" <redacted>
To: "'???'" <redacted>
Sent: Thursday, May 25, 2000 3:32 PM
Subject: RE: How to load kernel on RPX Lite Board ?

quoted

I want to load my kernel image into this board. To download
kernel image, The flash utility given by company needs
S-Record format. Actually, I do know about S-Record Format,
But I don't know how to make it.  I used Montavista-2.2.13
kernel and patched it. To build the kernel, I typed "make
zImage" and I got two files named "./vmlinux" and
"./arch/ppc/mbxboot/zImage" in the kernel directory.
After that,
#>powerpc-linux-objcopy -O srec vmlinux vmlinux.srec

vmlinux.srec is created, "S-Record format"

you can use that, or use the /opt/hardhat/devkit/ppc/8xx/bin/zsrec program:
'./zsrec vmlinux > vmlinux.srec'

quoted

To download via ethernet, I installed tftpserver on my PC,
and working good.

RPX Load menu: press 123456789T key : <?> : 7
Load using tftp via Ethernet
Enter server IP address <8DDF52DC> :

So, the IP address of your tftp server is 141.223.82.220? Because that is
the IP address you've specified above in HEX. You can change this through
the "C  Configure EEPROM" option. This IP must be your tftp server's IP
address (in HEX).

To convert an IP to hex: eg:
192.168.0.89 converted is -

192 = C0
168 = A8
0 = 00
89 = 59

Hence, C0A80059 == 192.168.0.89

(See below on my output example from my RPXLite board...)

quoted

Enter server filename   <vmlinux.srec> :
Enter address offset  : <00000000 hex> :
----


C0000390 [does not exist]
C00003A0 [does not exist]
C00003B0 [does not exist]
C00003C0 [does not exist]
C00003D0 [does not exist]
load_tftp(): ** E_RPX_DST_NOT_EXIST
3072 data bytes, 62 S-records, 6 tftp blocks, 0 repeated blocks

Could you tell me about how to download the kernel and root
file system onto my board. Maybe, Something wrong in my procedure.
I already read the instruction at
ftp://ftp.ppc.kernel.org/pub/linuxppc/embedded/getting_started.rpx
But I couldn't.

I really thank you, in advance.

Here's a snapshot of my MPC850/RPXLite board when downloading via tftp -
(You should see something similar):

RPX Load menu: press 123456789T key : <?> : 7
Load using tftp via Ethernet
Enter server IP address <C0A80059> :
Enter server filename   <myzag> : myzah
Enter address offset  : <00000000 hex> :
Starting tftp download:
inetARP(): OK
.1.2.4.8.16.32.64.128.256.512.1024.2048.4096
load_tftp(): OK
388970 data bytes, 4924 S-records, 760 tftp blocks, 0 repeated blocks

Once you have successfully loaded your kernel into RAM, ensure that the
start address is set to 0x0200000 (from Load Menu L, use '8 200000').

Then to start the execution, type '9 YES'  <-- uppercase YES.

Hope this helps.... let me know how you go.. :-)

Cheers,
Rod

** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/