diff --git a/arch/arm/include/arch/defines.h b/arch/arm/include/arch/defines.h
new file mode 100644
index 0000000..1d62a68
--- /dev/null
+++ b/arch/arm/include/arch/defines.h
@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2008 Travis Geiselbrecht
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef __ARCH_CPU_H
+#define __ARCH_CPU_H
+
+/* arm specific stuff */
+#define PAGE_SIZE 4096
+
+#if ARM_CPU_ARM7
+/* irrelevant, no consistent cache */
+#define CACHE_LINE 32
+#elif ARM_CPU_ARM926
+#define CACHE_LINE 32
+#elif ARM_CPU_ARM1136
+#define CACHE_LINE 32
+#elif ARM_CPU_CORTEX_A8
+#define CACHE_LINE 64
+#else
+#error unknown cpu
+#endif
+
+#endif
+