I encountered some issues writing to a memory that we allocated to be shared both the A5 and M4.
When I write to the shared memory in A5, not all data is being reflected immediately. It will only reflect when we tried to rewrite the data again.
Here is a scenario of what i am doing.
1. mmap the /dev/mem
2. update data in the shared memory
3. read in the M4.
Result: not all are reflected.
4. rewrite again in A5.
5. read in the M4.
Result: all are reflected.
We have similar experience in M4 and we solve it by calling _DCACHE_FLUSH_MLINES(). to flush the data after writing.
Does anybody know what would be the equivalent for flushing DCACHE in A5?