Index: head/sys/powerpc/powerpc/machdep.c
===================================================================
--- head/sys/powerpc/powerpc/machdep.c
+++ head/sys/powerpc/powerpc/machdep.c
@@ -284,8 +284,14 @@
 #endif
 		}
 	} else {
+#if !defined(BOOKE)
+		/*
+		 * On BOOKE the BSS is already cleared and some variables
+		 * initialized.  Do not wipe them out.
+		 */
 		bzero(__sbss_start, __sbss_end - __sbss_start);
 		bzero(__bss_start, _end - __bss_start);
+#endif
 		init_static_kenv(NULL, 0);
 	}
 	/* Store boot environment state */