What my understanding is that ioremap converts your address to a virtual address. So, yes everything then is handled by the kernel On Sun, Jul 11, 2021 at 9:04 PM <ckim@etri.re.kr> wrote:
Hello all,
I’m almost sure but want to check if my understanding is correct.
To use a memory mapped IO, we use functions like request_mem_region and ioremap, iounmap functions.
I guess when we call ioremap function, the kernel sets up page table for the region so that the region becomes non-cacheable, and I don’t also have to worry about reordering problem.
Is my understanding correct?
Thanks!
Chan Kim _______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies