ioremap and page table
kartikey406 at gmail.com
Sun Jul 11 12:48:17 EDT 2021
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 at 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?
> Chan Kim
> Kernelnewbies mailing list
> Kernelnewbies at kernelnewbies.org
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