On 16/08/13 23:16, Greg Ungerer wrote:
> On 16/08/13 22:48, Philip Craig wrote:
>> On Fri, Aug 16, 2013 at 10:40 PM, Greg Ungerer <[email protected]> wrote:
>>> Has anyone used openocd on the Marvell ARAMADA 370 SoC?
>>>
>>> I have a Globalscale Mirabox and am trying to get JTAG debugging working
>>> on it. I am using an Amontec jtagkey, and have some basic functionality
>>> working. But I can't access the bus in any way without getting errors
>>> like this:
>>>
>>> > arm disassemble 0x0063C9A0 10
>>> JTAG-DP STICKY ERROR
>>> MEM_AP_CSW 0x28000d2, MEM_AP_TAR 0x63c9a0
>>> JTAG-DP STICKY ERROR
>>> MEM_AP_CSW 0x28000d2, MEM_AP_TAR 0x63c9a0
>>> Block read error address 0x63c9a0
>>> in procedure 'arm'
>>>
>>> I can halt the cpu, single step, set breakpoints and run to it.
>>> I can dump the registers and get (what looks like) good values.
>>> But just can't access anything on the bus.
>>
>> That sounds similar to a problem I was having with imx6. Try 'dap apcsw 1'.
>
> Thanks. Quick test seems to show it still produces the same error.
> If I do "dap apcsw" I get back:
>
> apsel 0 selected, csw 0x40000000
>
> And I get the same result after running "dap apcsw 1". Not sure if
> that is right.
What I needed was:
dap apsel 1
After that I can sometimes disassemble at the stopped pc :-)
When the unit is running linux (so MMU enabled) I can dissemble.
But say when running uboot then it fails with:
> halt
target state: halted
target halted in ARM state due to debug-request, current mode: Supervisor
cpsr: 0x800001d3 pc: 0x00647ae0
MMU: disabled, D-Cache: disabled, I-Cache: enabled
> arm disassemble 0x00647ae0 5
647ae0 access in userspace and target in supervisor
in procedure 'arm'
> mdw 0x00647ae0 16
647ae0 access in userspace and target in supervisor
in procedure 'mdw'
Trying to access other memory regions results in errors like:
> mdw 0xd0012000 16
trying to enable mmu on target stopped with mmu disable
in procedure 'mdw'
Why is it trying to enable the MMU to do this?
Regards
Greg
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