svn commit: r258287 - head/sys/arm/arm

[Alan Cox]

Author: alc
Date: Sun Nov 17 23:28:10 2013
New Revision: 258287
URL: http://svnweb.freebsd.org/changeset/base/258287

Log:
  Implement pmap_align_superpage().
  
  MFC after:	6 weeks

Modified:
  head/sys/arm/arm/pmap-v6.c

Modified: head/sys/arm/arm/pmap-v6.c
==============================================================================
--- head/sys/arm/arm/pmap-v6.c	Sun Nov 17 23:19:06 2013	(r258286)
+++ head/sys/arm/arm/pmap-v6.c	Sun Nov 17 23:28:10 2013	(r258287)
@@ -5021,6 +5021,20 @@ void
 pmap_align_superpage(vm_object_t object, vm_ooffset_t offset,
     vm_offset_t *addr, vm_size_t size)
 {
+	vm_offset_t superpage_offset;
+
+	if (size < NBPDR)
+		return;
+	if (object != NULL && (object->flags & OBJ_COLORED) != 0)
+		offset += ptoa(object->pg_color);
+	superpage_offset = offset & PDRMASK;
+	if (size - ((NBPDR - superpage_offset) & PDRMASK) < NBPDR ||
+	    (*addr & PDRMASK) == superpage_offset)
+		return;
+	if ((*addr & PDRMASK) < superpage_offset)
+		*addr = (*addr & ~PDRMASK) + superpage_offset;
+	else
+		*addr = ((*addr + PDRMASK) & ~PDRMASK) + superpage_offset;
 }
 
 /*