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;
}
/*
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