diff --git a/lib_arm/board.c b/lib_arm/board.c
index 54f554b..af6af14 100644
--- a/lib_arm/board.c
+++ b/lib_arm/board.c
@@ -35,6 +35,8 @@
 void nand_init (void);
 #endif
 
+ulong monitor_flash_len;
+
 const char version_string[] =
 	U_BOOT_VERSION" (" __DATE__ " - " __TIME__ ")";
 
@@ -204,6 +206,8 @@
 	gd->bd = &bd_data;
 	memset (gd->bd, 0, sizeof (bd_t));
 
+	monitor_flash_len = _armboot_end_data - _armboot_start;
+
 	for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
 		if ((*init_fnc_ptr)() != 0) {
 			hang ();