I am trying to debug U-Boot on an 8548 based board.

The tool chain is from ELDK 4.0 and I am using a BDI2000.

Up to now have used the TI instruction to step through the assembler line by line with the BDI2000. I am now at

board_init_f

and want to start using gdb to speed things up.

However when rebooting the board and connecting gdb I get an unexpected result. The code is not at 0xfffffffc as expected:

[root@d6157 u-boot-27-apr-2006]# ppc_85xx-gdb u-boot

GNU gdb Red Hat Linux (6.3.0.0-1.21_1rh) Copyright 2004 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License,

This GDB was configured as "--host=i386-redhat-linux --target=ppc-linux"...

(gdb) target remote xxx.xxx.xxx.xxx:2001

Remote debugging using xxx.xxx.xxx.xxx:2001

0xd8f61fc2 in ?? ()

(gdb)

while the terminal window connected to the BDI2000 has the following:

ipax8548E_ubt>info Target CPU : MPC8548 Rev.1 Target state : halted Debug entry cause : unknown Current PC : 0xfffffffc Current CR : 0x00000000 Current MSR : 0x00000000 Current LR : 0x00000000 Current CCSRBAR : 0x0_ff700000 ipax8548E_ubt>

The BDI config file contains the following:

[INIT] WM32 0xFF7E0F08 0x00000008 ;Clear bit 30 in the engineering only register ;(CCSR space register at offset 0xe0f08) WSPR 1009 0x00001000 ; Enable ABE bit see Errata for 8548E Rev 1

WSPR 63 0xffff0000 ; IVPR to boot core WSPR 415 0x0000f000 ; IVOR15 - debug exception

[TARGET] CPUTYPE 8548 ;the CPU type JTAGCLOCK 2 ;use 4 MHz JTAG clock - needed for Flash. STARTUP HALT ;halt core while HRESET is asserted BREAKMODE HARD ;SOFT or HARD, HARD uses PPC hardware breakpoint STEPMODE HWBP ;JTAG or HWBP, HWBP uses a hardware breakpoint WAKEUP 500 ;give reset time to complete POWERUP 5000 ;start delay after power-up detected in ms

Is there anything obvious that is wrong here ?

Thanks,

Charles.

------------------------------------------------------------------------   Dr Charles J Gillan The Institute of Electronics, Communications and Information Technology (ECIT),                Queen's University Belfast, Titanic Quarter Queen’s Road, Queen’s Island, Belfast, BT3 9DT Northern Ireland, UK   Tel: +44 (0) 2890 971847 Fax: +44 (0) 2890 971702    ------------------------------------------------------------------------