... (gdb) ni

<signal handler called> (gdb) disassemble Dump of assembler code for function boot_cold: 0xfff00118 <boot_cold+0>: lis r3,3841 0xfff0011c <boot_cold+4>: nop 0xfff00120 <boot_cold+8>: lwz r4,0(r3) 0xfff00124 <boot_cold+12>: nop (gdb) ni Cannot access memory at address 0x3b87018 (gdb) info program Debugging a target over a serial line. Program stopped at 0xfff00124. It stopped with signal SIGTRAP, Trace/breakpoint trap. (gdb)

I have discovered that if I use IMMR from default config for BDI WM32 0x0F0101A8 0x04700000 ;IMMR : internal space @ 0x04700000 ... then on 'ti' or 'go' it resetting after only a few commands (see above). If I comment the IMMR in ads8272.cfg (BDI config) then I can debug through BDI or gdb.

It resets as expected. BDI changes the IMMR from the HRCW to 0x04700000 and the u-boot code snippet shown is accessing address 3841 which is 0x0F010000 in hex which is no longer there....