svn commit: r286080 - head/sys/arm64/arm64

[Andrew Turner]

Author: andrew
Date: Thu Jul 30 16:17:44 2015
New Revision: 286080
URL: https://svnweb.freebsd.org/changeset/base/286080

Log:
  Add enough of pmap_page_set_memattr to run gstat. It still needs to split
  the DMAP 1G pages so we set the attributes only on the specified page.
  
  Obtained from:	ABT Systems Ltd
  Sponsored by:	The FreeBSD Foundation

Modified:
  head/sys/arm64/arm64/pmap.c

Modified: head/sys/arm64/arm64/pmap.c
==============================================================================
--- head/sys/arm64/arm64/pmap.c	Thu Jul 30 16:06:13 2015	(r286079)
+++ head/sys/arm64/arm64/pmap.c	Thu Jul 30 16:17:44 2015	(r286080)
@@ -2971,7 +2971,17 @@ void
 pmap_page_set_memattr(vm_page_t m, vm_memattr_t ma)
 {
 
-	panic("ARM64TODO: pmap_page_set_memattr");
+	m->md.pv_memattr = ma;
+
+	/*
+	 * ARM64TODO: Implement the below (from the amd64 pmap)
+	 * If "m" is a normal page, update its direct mapping.  This update
+	 * can be relied upon to perform any cache operations that are
+	 * required for data coherence.
+	 */
+	if ((m->flags & PG_FICTITIOUS) == 0 &&
+	    PHYS_IN_DMAP(VM_PAGE_TO_PHYS(m)))
+		panic("ARM64TODO: pmap_page_set_memattr");
 }
 
 /*