[U-Boot-Users] debug linux kernel hangs

[U-Boot-Users] debug linux kernel hangs

[Alex shi]

Hi all:
    My platform is MPC8247, u-boot verison is 1.1.1 and linux kernel version is 2.4.22
in the serial console I load the linux kernel and want to boot it under u-boot:
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
=> setenv ethaddr 00:01:02:03:04:05
=> setenv ipaddr 192.168.0.33
=> setenv serverip 192.168.0.222
=> tftp 0x100000 uImage
Using FCC1 ETHERNET device
TFTP from server 192.168.0.222; our IP address is 192.168.0.33
Filename 'uImage'.
Load address: 0x100000
Loading: #################################################################
         #################################################################
         #####################################
done
Bytes transferred = 853098 (d046a hex)
=> bootm 0x100000
## Booting image at 00100000 ...
   Image Name:   Linux Kernel Image
   Image Type:   PowerPC Linux Kernel Image (gzip compressed)
   Data Size:    853034 Bytes = 833 kB
   Load Address: 00000000
   Entry Point:  00000000
   Verifying Checksum ... OK
   Uncompressing Kernel Image ... OK
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
but after print the "Uncompressing Kernel Image ... OK" msg, the kernel hangs.
I use the same u-boot.h file under linux kernel and u-boot, and sure the bd_info in them are same. 
IMMR address also are same at 0xf0000000.

My bdi2000 run and print below:
++++++++++++++++++++++++++++++++++
8272>i
    Target CPU        : MPC8280/8220/5200 (Zeppo)
    Target state      : debug mode
    Debug entry cause : COP freeze (startup)
    Current PC        : 0xfff00100
    Current CR        : 0x00000000
    Current MSR       : 0x00001042
    Current LR        : 0x00000000
8272>g
8272>h
    Target CPU        : MPC8280/8220/5200 (Zeppo)
    Target state      : debug mode
    Debug entry cause : COP halt
    Current PC        : 0x07fe94c8
    Current CR        : 0x84002024
    Current MSR       : 0x0000b002
    Current LR        : 0x07fda464
8272>bi 0xc01554c8    (which is the start_kernel_address)
Breakpoint identification is 1
8272>g
- TARGET: stopped
8272>i
    Target CPU        : MPC8280/8220/5200 (Zeppo)
    Target state      : debug mode
    Debug entry cause : <reserved 0>
    Current PC        : 0x001cbde4
    Current CR        : 0x24008084
    Current MSR       : 0x00003002
    Current LR        : 0x00000028
+++++++++++++++++++++++++++++++++++++++++++

Why the Current PC can not get the start_kernel address? How can i to debug the linux kernel?
Any hits will be very appreciated!

BRG
Alexander


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[U-Boot-Users] debug linux kernel hangs

[Alex shi]

 
Hi Denk:     Sorry, I did not notice it.Hi all:
     My platform is MPC8247, u-boot verison is 1.1.1 and linux kernel version is 2.4.22
 in the serial console I load the linux kernel and want to boot it under u-boot:
 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
 => setenv ethaddr 00:01:02:03:04:05
 => setenv ipaddr 192.168.0.33
 => setenv serverip 192.168.0.222
 => tftp 0x100000 uImage
 Using FCC1 ETHERNET device
 TFTP from server 192.168.0.222; our IP address is 192.168.0.33
 Filename "uImage".
 Load address: 0x100000
 Loading: #################################################################
          #################################################################
          #####################################
 done
 Bytes transferred = 853098 (d046a hex)
 => bootm 0x100000
 ## Booting image at 00100000 ...
    Image Name:   Linux Kernel Image
    Image Type:   PowerPC Linux Kernel Image (gzip compressed)
    Data Size:    853034 Bytes = 833 kB
    Load Address: 00000000
    Entry Point:  00000000
    Verifying Checksum ... OK
    Uncompressing Kernel Image ... OK
 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
 but after print the "Uncompressing Kernel Image ... OK" msg, the kernel hangs.
 I use the same u-boot.h file under linux kernel and u-boot, and sure the bd_info in them
are same. 
 IMMR address also are same at 0xf0000000.
 
 My bdi2000 run and print below:
 ++++++++++++++++++++++++++++++++++
 8272>i
     Target CPU        : MPC8280/8220/5200 (Zeppo)
     Target state      : debug mode
     Debug entry cause : COP freeze (startup)
     Current PC        : 0xfff00100
     Current CR        : 0x00000000
     Current MSR       : 0x00001042
     Current LR        : 0x00000000
 8272>g
 8272>h
     Target CPU        : MPC8280/8220/5200 (Zeppo)
     Target state      : debug mode
     Debug entry cause : COP halt
     Current PC        : 0x07fe94c8
     Current CR        : 0x84002024
     Current MSR       : 0x0000b002
     Current LR        : 0x07fda464
 8272>bi 0xc01554c8    (which is the start_kernel_address)
 Breakpoint identification is 1
 8272>g
 - TARGET: stopped
 8272>i
     Target CPU        : MPC8280/8220/5200 (Zeppo)
     Target state      : debug mode
     Debug entry cause : <reserved 0>
     Current PC        : 0x001cbde4
     Current CR        : 0x24008084
     Current MSR       : 0x00003002
     Current LR        : 0x00000028
 +++++++++++++++++++++++++++++++++++++++++++
 
 Why the Current PC can not get the start_kernel address? How can i to debug the linux
kernel?
 Any hits will be very appreciated!
 
 BRG
 Alexander

[U-Boot-Users] debug linux kernel hangs

[Alex shi]

Hi Denk:
    I am sorry for pre  unreadable mail.
Hi All:

 My box is MPC8247
I use u-boot 1.1.1 to boot linux kernel 2.4.22, the bd_info are same in 
u-boot.h, and IMMR address also same at 0xf0000000.
but after input bootm command the linux kernel hangs:
====================================
 => setenv ipaddr 192.168.0.33
 => setenv serverip 192.168.0.222
 => tftp 0x100000 uImage
 Using FCC1 ETHERNET device
 TFTP from server 192.168.0.222; our IP address is 192.168.0.33
 Filename "uImage".
 Load address: 0x100000
 Loading: #################################################################
          #################################################################
          #####################################
 done
 Bytes transferred = 853098 (d046a hex)
 => bootm 0x100000
 ## Booting image at 00100000 ...
    Image Name:   Linux Kernel Image
    Image Type:   PowerPC Linux Kernel Image (gzip compressed)
    Data Size:    853034 Bytes = 833 kB
    Load Address: 00000000
    Entry Point:  00000000
    Verifying Checksum ... OK
    Uncompressing Kernel Image ... OK
=============================================

and under the ppc_6xx-gdb :
==========================
(gdb)
620             ppc_md.setup_arch();
(gdb) n

<<<<< long time wait and then press ctl + c.


?
Program received signal SIGSTOP, Stopped (signal).
0xc0007e4c in __delay () at time.c:427
427     }
(gdb) where
#0  0xc0007e4c in __delay () at time.c:427
#1  0xc0015ae4 in panic (fmt=0x2bbbd "\001") at delay.h:42
(gdb)
=========================
It seems kernel breaken down@ppc_md.setup_arch()
and panic a message to me, isn't it?

Any hints will be appreciated!

BRG
Alexander

[U-Boot-Users] debug linux kernel hangs

[Wolfgang Denk]

Hello,

in message <021a01c57785$fc451a30$4500a8c0@baniantealex> you wrote:
>
>  My box is MPC8247
> I use u-boot 1.1.1 to boot linux kernel 2.4.22, the bd_info are same in 

Both the versions of U-Boot and Linux kernel are very,  very  old.  I
strongly recommend to use more current versions of the software.

> 620             ppc_md.setup_arch();
> (gdb) n
> 
> <<<<< long time wait and then press ctl + c.
...
> #0  0xc0007e4c in __delay () at time.c:427
> #1  0xc0015ae4 in panic (fmt=0x2bbbd "\001") at delay.h:42

So your kernel has paniced.

> and panic a message to me, isn't it?

Indeed. And what was the panic message? What was the contents of  the
log_buf area?

I'm afraid you will have to type the commands to display the contents
of the log buffer yourself - you did not give instructions how to log
in on your system.

See also http://www.denx.de/twiki/bin/view/DULG/LinuxPostMortemAnalysis


And by the way: this is a Linux problem, so all of this is completely
off topic on this list.

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
"'Tis true, 'tis pity, and pity 'tis 'tis true."
    - Poloniouius, in Willie the Shake's _Hamlet, Prince of Darkness_

[U-Boot-Users] debug linux kernel hangs

[Alex shi]

Hi Denk:

    Thanks your help. Just because the serial console can not work on my 
board, so I step into kernel to trace.
I think maybe the kernel init sequence can not arrive the console_init(), so 
I can not get any message after run "bootm". It just told me "Uncompressing 
Kernel Image ... OK", then it hangs.
Bye the way, I only the u-boot 1.1.1 and linux kernel 2.4.22 in hand, where 
I can find the lastest code?

Thanks again!
BRG



----- Original Message ----- 
From: "Wolfgang Denk" <wd@denx.de>
To: "Alex shi" <alex.shi@tom.com>
Cc: <u-boot-users@lists.sourceforge.net>
Sent: Thursday, June 23, 2005 8:11 AM
Subject: Re: [U-Boot-Users] debug linux kernel hangs


> Hello,
>
> in message <021a01c57785$fc451a30$4500a8c0@baniantealex> you wrote:
>>
>>  My box is MPC8247
>> I use u-boot 1.1.1 to boot linux kernel 2.4.22, the bd_info are same in
>
> Both the versions of U-Boot and Linux kernel are very,  very  old.  I
> strongly recommend to use more current versions of the software.
>
>> 620             ppc_md.setup_arch();
>> (gdb) n
>>
>> <<<<< long time wait and then press ctl + c.
> ...
>> #0  0xc0007e4c in __delay () at time.c:427
>> #1  0xc0015ae4 in panic (fmt=0x2bbbd "\001") at delay.h:42
>
> So your kernel has paniced.
>
>> and panic a message to me, isn't it?
>
> Indeed. And what was the panic message? What was the contents of  the
> log_buf area?
>
> I'm afraid you will have to type the commands to display the contents
> of the log buffer yourself - you did not give instructions how to log
> in on your system.
>
> See also http://www.denx.de/twiki/bin/view/DULG/LinuxPostMortemAnalysis
>
>
> And by the way: this is a Linux problem, so all of this is completely
> off topic on this list.
>
> Best regards,
>
> Wolfgang Denk
>
> -- 
> Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
> Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
> "'Tis true, 'tis pity, and pity 'tis 'tis true."
>    - Poloniouius, in Willie the Shake's _Hamlet, Prince of Darkness_
>