> On 11 Mar 2022, at 02:21, John Baldwin <j...@freebsd.org> wrote:
>
> The branch main has been updated by jhb:
>
> URL:
> https://cgit.FreeBSD.org/src/commit/?id=832acea92fc8cdb55859a6a4b1bc38bf766780f1
>
> commit 832acea92fc8cdb55859a6a4b1bc38bf766780f1
> Author: John Baldwin <j...@freebsd.org>
> AuthorDate: 2022-03-11 02:20:28 +0000
> Commit: John Baldwin <j...@freebsd.org>
> CommitDate: 2022-03-11 02:20:28 +0000
>
> icl_soft: Use PHYS_TO_DMAP instead of pmap_map_io_transient.
The i386 and arm version of PHYS_TO_DMAP is:
#define PHYS_TO_DMAP(x) ({ panic("No direct map exists"); 0; })
On these architectures there is no DMAP region.
On powerpc there may not be a DMAP region. It appears to depend on the CPU.
You can use PMAP_HAS_DMAP to check if the DMAP region is supported, however
you’ll need a fallback to create a temporary mapping.
Andrew
