RPi 4B MMU seems to be enabled but throwing aarch64-default-exception error

[Noor Aman]

Openocd connection is on my website. Here's the link to that.
https://0xnoor.hashnode.dev/setup-openocd-with-jtag-uart-on-raspberry-pi-4-using-ft232h

I pushed the code to my github repo. Be sure to checkout noor-dev branch.
Here's the link for that. https://github.com/0xnoor/rtems

And yes the code looks bad as of now, I'll do optimization and everything
soon.

Thanks

On Fri, 2 Sept 2022 at 23:31, Alan Cudmore <alan.cudmore at gmail.com> wrote:

> Hi Noor,
> Can you describe the setup you use for testing the BSP?
> I can set up my Pi 4 to try running your code as you update it. How do you
> setup the OCD connection?
>
> Thanks,
> Alan
>
> On Fri, Sep 2, 2022 at 11:48 AM Noor Aman <nooraman5718 at gmail.com> wrote:
>
>> Hey all,
>> Raspberry Pi 4B MMU seems to be enabled, as reported by openocd but gdb
>> is showing to run in a loop from aarch64-defaulit-exception.S file starting
>> from code line number 143 to 220.
>>
>> From what I can gather, it is being caused by the wrong MMU address.
>>  Here's a RAM and MMU allocation sizes and base
>>
>>   MEMORY {
>>   RAM_MMU  : ORIGIN = 0x0, LENGTH = (0x1000 *
>> ${AARCH64_MMU_TRANSLATION_TABLE_PAGES})
>>   RAM      : ORIGIN = 0x80000, LENGTH = 1024M
>>   }
>>
>> Relevant Openocd info
>>
>> bcm2711.cpu0 halted in AArch64 state due to debug-request, current mode:
>> EL1T
>> cpsr: 0x200003c4 pc: 0x8e208
>> MMU: enabled, D-Cache: enabled, I-Cache: enabled
>> Info : New GDB Connection: 1, Target bcm2711.cpu0, state: halted
>>
>> Any ideas?
>>
>> Thanks,
>> Noor
>>
>
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