[U-Boot] U-Boot hangs when board is attached to BDI2000

[U-Boot] U-Boot hangs when board is attached to BDI2000

[Dunda, Matthias]

Hi all,

I am trying to debug u-boot following the instructions in DULG 10.1.

As mentioned in 10.1.1. before relocation I connect to the target an get
desired first output:

Remote debugging using jtag:3333
0xfffffffc in ?? ()

Even without setting a breakpoint then, I just say gdb to continue:

(gdb) c
Continuing.

The output in the console then is:

U-Boot 2009.08 (Nov 25 2009 - 09:18:37)

CPU:   8568E, Version: 1.1, (0x807d0011)
Core:  E500, Version: 2.2, (0x80210022)
Clock Configuration:
       CPU0:1320 MHz,
       CCB:528  MHz,
       DDR:264  MHz (528 MT/s data rate), LBC:66   MHz
       QE:528  MHz
L1:    D-cache 32 kB enabled
       I-cache 32 kB enabled
Board: 8568 MDS
I2C:   ready
DRAM:  Initializing
    SDRAM: 64 MB
    DDR: 512 MB (DDR2, 64-bit, CL=4, ECC off)

...and nothing further happens.

After 30 secs or so, I simply hit Ctrl-C and get:

^C
Program received signal SIGSTOP, Stopped (signal).
0x1ff70700 in ?? ()
(gdb) bt
#0  0x1ff70700 in ?? ()
#1  0x1ff71574 in ?? ()
Cannot access memory at address 0xdeadbef3
(gdb) 

When I issue a "reset run" within the BDI shell, the target boots as
expected, but when I start the target with "reset halt" to debug it from the
first instruction it behaves at described above.

I am using a BDI2000 on a Freescale MPC8568E-MDS board. U-boot 2009.08 is
compiled with

  make CROSS_COMPILE=ppc_85xx- MPC8568MDS_config
  make CROSS_COMPILE=ppc_85xx- all

Any ideas? Is there some watchdog issue to cope with, maybe? 

Cheers
Matthias

[U-Boot] U-Boot hangs when board is attached to BDI2000

[Detlev Zundel]

Hi Matthias,

> When I issue a "reset run" within the BDI shell, the target boots as
> expected, but when I start the target with "reset halt" to debug it from the
> first instruction it behaves at described above.

Remeber that a "reset run" lets the CPU run from reset completely by
itself, this essentially bypassing the init list statements in the BDI
config file.  A "reset halt" on the other hand will "execute" them.  So
it is very likely that you have a discrepancy between whet U-Boot
initlaizes and what your bdi init file does.  One of such things is for
example if the init file moves immrbase, mbarbase or whatever it is
called on the mpc85xx and U-Boot later on tries to do the same again.

Cheers
  Detlev

-- 
What is piracy?   Piracy is the act of stealing an artist's work without
any intention of paying for it. I'm not talking about Napster-type soft-
ware.  I'm talking about major label recording contracts.
           -- Courtney Love
--
DENX Software Engineering GmbH,      MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich,  Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-40 Fax: (+49)-8142-66989-80 Email: dzu at denx.de