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 Queens Road, Queens Island, Belfast, BT3 9DT Northern Ireland, UK Tel: +44 (0) 2890 971847 Fax: +44 (0) 2890 971702 ------------------------------------------------------------------------