Index: uspace/libc/include/as.h
===================================================================
--- uspace/libc/include/as.h	(revision 5a8b2a2e58c0aff599e30b00eed3a773ff644968)
+++ uspace/libc/include/as.h	(revision df496c53916f2aa97e799467523c227b41d98c3b)
@@ -40,4 +40,7 @@
 #include <kernel/arch/mm/as.h>
 #include <kernel/mm/as.h>
+#include <libarch/config.h>
+
+#define PAGE_COLOR(va)	(((va) >> PAGE_WIDTH) & ((1 << PAGE_COLOR_BITS) - 1))
 
 extern void *as_area_create(void *address, size_t size, int flags);
@@ -45,5 +48,5 @@
 extern int as_area_destroy(void *address);
 extern void *set_maxheapsize(size_t mhs);
-extern void * as_get_mappable_page(size_t sz);
+extern void * as_get_mappable_page(size_t sz, int color);
 
 #endif
Index: uspace/libc/include/bitops.h
===================================================================
--- uspace/libc/include/bitops.h	(revision df496c53916f2aa97e799467523c227b41d98c3b)
+++ uspace/libc/include/bitops.h	(revision df496c53916f2aa97e799467523c227b41d98c3b)
@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 2006 Ondrej Palkovsky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup generic	
+ * @{
+ */
+/** @file
+ */
+
+#ifndef LIBC_BITOPS_H_
+#define LIBC_BITOPS_H_
+
+#include <types.h>
+
+
+/** Return position of first non-zero bit from left (i.e. [log_2(arg)]).
+ *
+ * If number is zero, it returns 0
+ */
+static inline int fnzb32(uint32_t arg)
+{
+	int n = 0;
+
+	if (arg >> 16) {
+		arg >>= 16;
+		n += 16;
+	}
+	
+	if (arg >> 8) {
+		arg >>= 8;
+		n += 8;
+	}
+	
+	if (arg >> 4) {
+		arg >>= 4;
+		n += 4;
+	}
+	
+	if (arg >> 2) {
+		arg >>= 2;
+		n += 2;
+	}
+	
+	if (arg >> 1) {
+		arg >>= 1;
+		n += 1;
+	}
+	
+	return n;
+}
+
+static inline int fnzb64(uint64_t arg)
+{
+	int n = 0;
+
+	if (arg >> 32) {
+		arg >>= 32;
+		n += 32;
+	}
+	
+	return n + fnzb32((uint32_t) arg);
+}
+
+#define fnzb(x) fnzb32(x)
+
+#endif
+
+/** @}
+ */