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diff --git a/i386/pc/phys_mem.h b/i386/pc/phys_mem.h
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+/* 
+ * Copyright (c) 1995 The University of Utah and
+ * the Computer Systems Laboratory at the University of Utah (CSL).
+ * All rights reserved.
+ *
+ * Permission to use, copy, modify and distribute this software is hereby
+ * granted provided that (1) source code retains these copyright, permission,
+ * and disclaimer notices, and (2) redistributions including binaries
+ * reproduce the notices in supporting documentation, and (3) all advertising
+ * materials mentioning features or use of this software display the following
+ * acknowledgement: ``This product includes software developed by the
+ * Computer Systems Laboratory at the University of Utah.''
+ *
+ * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
+ * IS" CONDITION.  THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
+ * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * CSL requests users of this software to return to csl-dist@cs.utah.edu any
+ * improvements that they make and grant CSL redistribution rights.
+ *
+ *      Author: Bryan Ford, University of Utah CSL
+ */
+/*
+ * PC-specific flag bits and priority values
+ * for the List Memory Manager (LMM)
+ * relevant for kernels managing physical memory.
+ */
+#ifndef _I386_PC_PHYS_MEM_H_
+#define _I386_PC_PHYS_MEM_H_
+
+#include_next "phys_mem.h"
+
+/* <1MB memory is most precious, then <16MB memory, then high memory.
+   Assign priorities to each region accordingly
+   so that high memory will be used first when possible,
+   then 16MB memory, then 1MB memory.  */
+#define LMM_PRI_1MB	-2
+#define LMM_PRI_16MB	-1
+#define LMM_PRI_HIGH	0
+
+/* For memory <1MB, both LMMF_1MB and LMMF_16MB will be set.
+   For memory from 1MB to 16MB, only LMMF_16MB will be set.
+   For all memory higher than that, neither will be set.  */
+#define LMMF_1MB	0x01
+#define LMMF_16MB	0x02
+
+
+/* Call one of these routines to add a chunk of physical memory found
+   to the malloc_lmm free list.
+   It assigns the appropriate flags and priorities to the region,
+   as defined above, breaking up the region if necessary.  */
+void phys_mem_add(vm_offset_t min, vm_size_t size);
+void i16_phys_mem_add(vm_offset_t min, vm_size_t size);
+
+#endif _I386_PC_PHYS_MEM_H_