After I have enabled MMU, I want to write a value to a specify address by DS-5. The DS-5 reports an error as following:
memory set_typed EL3:0x0000000080006000 (unsigned int) (0x1)ERROR(TAD11-NAL23): ! Failed to write 4 bytes to address EL3:0x0000000080006000! Error accessing memory.
Then I read this address by DS-5 again. I find the value has been wrote to the address.
By the way, if I disable MMU, I can write a value to a specify without any error.
What does DS-5 check, after it writes a value to a specify address?
Thanks!
Hi Ronan Synnott,
I attach a memory layout of 'info memory' of DS-5 and my MMU configuration.
The SP: prefix refers to "secure world, physical memory". I wonder if the system responds to say that secure accesses are not allowed (even though they are, as the write seemingly completes) - hence the debugger flags that the write failed.
I try to change 0x80006000 to None-secure world, as below:
The error is reported by DS-5 still.