Hi Luca, On 26 January 2011 00:13, luca ellero <lro...@gmail.com> wrote: > With your patch it seems to work. Anyway after issuing "halt" instruction, I > always get the following message: > > target state: halted > target halted in Thumb state due to debug-request, current mode: Supervisor > cpsr: 0x60000173 pc: 0x0002dc92 > MMU: disabled, D-Cache: disabled, I-Cache: enabled > > I would point out that I'm using PandaBoard without any SD inserted, so only > ROM code is executed. > > It seems quite strange that the target state is always Thumb and not ARM. > Even pc value is strange, I would expect someting in the range > 0x40028000-0x40033FFF (which is where the ROM boot code is mapped, right?).
I think this is fine: it makes sense that the ROM is thumb to minimise code size. The addresses are also fine: see section 27.4.2.1 of the OMAP4430 TRM. What I'm confused about is that you can't read the ROM through the debugger. Dumping the exception vectors from the debugger gives: > mdw 0x28000 8 0x00028000: 40014000 40034002 40054004 40074006 40094008 400b400a 400d400c 400f400e which makes no sense to me (note the weird pattern). However, if you run to u-boot and do the same: Panda # md.l 0x28000 8 00028000: ea000242 e59ff018 e59ff018 e59ff018 00028010: e59ff018 e59ff018 e59ff018 e59ff018 it looks correct. > Regarding x-loader issue, I also noticed this problem. After a little > investigation I found that the problem is related to clocking (as you > correctly presume). > [snip] I think I've got an x-loader fix for this... I'm trying to test it now with Linux. Stay tuned. -- Aaron _______________________________________________ Openocd-development mailing list Openocd-development@lists.berlios.de https://lists.berlios.de/mailman/listinfo/openocd-development
