On Mon, Nov 03, 2014 at 01:52:44PM -0500, John Baldwin wrote: > On Saturday 01 November 2014 18:55:53 Sourish Mazumder wrote: > > Hi John, > > > > I tried the pmap_mapdev() as suggested by you. Works perfectly. Thanks for > > the information. > > Sure. > > > What is required, If I want to add this nvram memory to VM pages? > > Hmm. If this is device memory you generally don't want that. I'm not > actually sure how to do this at runtime. If you don't mind having a local > hack you can add a change in the MD startup code (e.g. in hammer_time() > in sys/amd64/amd64/machdep.c) to adjust the ranges added to > phys_avail[] and dump_avail[].
The facility exists to do this. It is OBJT_MGTDEVICE pager and vm_phys_fictitious_reg_range(). This is used by i915 and TTM for aperture, and seems XEN dom0 code uses it for mapping pages from other domains into dom0. _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-amd64 To unsubscribe, send any mail to "[email protected]"
