Background: pmap_object_init_pt() premaps the pages of a object in

order to avoid the overhead of later page faults.  In general, it
implements two cases: one for vnode-backed objects and one for
device-backed objects.  Only the device-backed case is really
machine-dependent, belonging in the pmap.

This commit moves the vnode-backed case into the (relatively) new
function vm_map_pmap_enter().  On amd64 and i386, this commit only
amounts to code rearrangement.  On alpha and ia64, the new machine
independent (MI) implementation of the vnode case is smaller and more
efficient than their pmap-based implementations.  (The MI
implementation takes advantage of the fact that objects in -CURRENT
are ordered collections of pages.)  On sparc64, pmap_object_init_pt()
hadn't (yet) been implemented.

1 files changed, 5 insertions, 2 deletions

diff --git a/sys/sparc64/sparc64/pmap.c b/sys/sparc64/sparc64/pmap.c
index 947fd92..337982c 100644
--- a/sys/sparc64/sparc64/pmap.c
+++ b/sys/sparc64/sparc64/pmap.c
@@ -1341,9 +1341,12 @@ pmap_enter_quick(pmap_t pm, vm_offset_t va, vm_page_t m, vm_page_t mpte)
 
 void
 pmap_object_init_pt(pmap_t pm, vm_offset_t addr, vm_object_t object,
-		    vm_pindex_t pindex, vm_size_t size, int limit)
+		    vm_pindex_t pindex, vm_size_t size)
 {
-	/* XXX */
+
+	VM_OBJECT_LOCK_ASSERT(object, MA_OWNED);
+	KASSERT(object->type == OBJT_DEVICE,
+	    ("pmap_object_init_pt: non-device object"));
 }
 
 void