Date: Fri, 11 Mar 2022 09:32:02 +0000 From: Andrew Turner <andrew@fubar.geek.nz> To: John Baldwin <jhb@freebsd.org> Cc: "src-committers@freebsd.org" <src-committers@FreeBSD.org>, "dev-commits-src-all@freebsd.org" <dev-commits-src-all@FreeBSD.org>, "dev-commits-src-main@freebsd.org" <dev-commits-src-main@FreeBSD.org> Subject: Re: git: 832acea92fc8 - main - icl_soft: Use PHYS_TO_DMAP instead of pmap_map_io_transient. Message-ID: <87FDC36E-0A15-4E43-A1C7-A2F61D60526F@fubar.geek.nz> In-Reply-To: <202203110221.22B2LmuN037273@gitrepo.freebsd.org> References: <202203110221.22B2LmuN037273@gitrepo.freebsd.org>
next in thread | previous in thread | raw e-mail | index | archive | help
> On 11 Mar 2022, at 02:21, John Baldwin <jhb@freebsd.org> wrote: >=20 > The branch main has been updated by jhb: >=20 > URL: = https://cgit.FreeBSD.org/src/commit/?id=3D832acea92fc8cdb55859a6a4b1bc38bf= 766780f1 >=20 > commit 832acea92fc8cdb55859a6a4b1bc38bf766780f1 > Author: John Baldwin <jhb@FreeBSD.org> > AuthorDate: 2022-03-11 02:20:28 +0000 > Commit: John Baldwin <jhb@FreeBSD.org> > CommitDate: 2022-03-11 02:20:28 +0000 >=20 > 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=E2=80=99ll need a fallback to create a temporary mapping. Andrew
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?87FDC36E-0A15-4E43-A1C7-A2F61D60526F>