+#define kBootDeviceKey "Boot Device"
+#define kTimeoutKey "Timeout"
+#define kRootDeviceKey "rd"
+#define kBootUUIDKey "boot-uuid"
+#define kPlatformKey "platform"
+#define kACPIKey "acpi"
+#define kCDROMPromptKey "CD-ROM Prompt"
+#define kCDROMOptionKey "CD-ROM Option Key"
+
+#define kDefaultKernel "mach_kernel"
+
+/*
+ * Flags to the booter or kernel
+ *
+ */
+#define kVerboseModeFlag "-v"
+#define kSafeModeFlag "-x"
+#define kOldSafeModeFlag "-f"
+#define kIgnoreBootFileFlag "-F"
+#define kSingleUserModeFlag "-s"
+
+/*
+ * Booter behavior control
+ */
+#define kBootTimeout -1
+#define kCDBootTimeout 8