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diff --git a/kitten/include/lwk/pmem.h b/kitten/include/lwk/pmem.h
new file mode 100644
index 0000000..d00d6e9
--- /dev/null
+++ b/kitten/include/lwk/pmem.h
@@ -0,0 +1,71 @@
+/* Copyright (c) 2008, Sandia National Laboratories */
+
+#ifndef _LWK_PMEM_H
+#define _LWK_PMEM_H
+
+/**
+ * Physical memory types.
+ */
+typedef enum {
+	PMEM_TYPE_BOOTMEM     = 0,  /* memory allocated at boot-time */
+	PMEM_TYPE_BIGPHYSAREA = 1,  /* memory set-aside for a device/driver */
+	PMEM_TYPE_INITRD      = 2,  /* initrd image provided by bootloader */
+	PMEM_TYPE_INIT_TASK   = 3,  /* memory used by the initial task */
+	PMEM_TYPE_KMEM        = 4,  /* memory managed by the kernel */
+	PMEM_TYPE_UMEM        = 5,  /* memory managed by user-space */
+} pmem_type_t;
+
+/**
+ * Defines a physical memory region.
+ */
+struct pmem_region {
+	paddr_t         start;             /* region occupies: [start, end) */
+	paddr_t         end;
+
+	bool            type_is_set;       /* type field is set? */
+	pmem_type_t     type;              /* physical memory type */
+
+	bool            lgroup_is_set;     /* lgroup field is set? */
+	lgroup_t        lgroup;            /* locality group region is in */
+
+	bool            allocated_is_set;  /* allocated field set? */
+	bool            allocated;         /* region is allocated? */ 
+
+	bool            name_is_set;       /* name field is set? */
+	char            name[32];          /* human-readable name of region */
+
+};
+
+/**
+ * Core physical memory management functions.
+ */
+int pmem_add(const struct pmem_region *rgn);
+int pmem_update(const struct pmem_region *update);
+int pmem_query(const struct pmem_region *query, struct pmem_region *result);
+int pmem_alloc(size_t size, size_t alignment,
+               const struct pmem_region *constraint,
+               struct pmem_region *result);
+
+/**
+ * Convenience functions.
+ */
+void pmem_region_unset_all(struct pmem_region *rgn);
+const char *pmem_type_to_string(pmem_type_t type);
+int pmem_alloc_umem(size_t size, size_t alignment, struct pmem_region *rgn);
+bool pmem_is_umem(paddr_t start, size_t extent);
+
+#ifdef __KERNEL__
+
+/**
+ * System call handlers.
+ */
+int sys_pmem_add(const struct pmem_region __user * rgn);
+int sys_pmem_update(const struct pmem_region __user * update);
+int sys_pmem_query(const struct pmem_region __user * query,
+                   struct pmem_region __user * result);
+int sys_pmem_alloc(size_t size, size_t alignment,
+                   const struct pmem_region __user *constraint,
+                   struct pmem_region __user *result);
+
+#endif
+#endif