diff --git a/include/asm-powerpc/mmu-44x.h b/include/asm-powerpc/mmu-44x.h
index 7bbc37e..d5ce7a8 100644
--- a/include/asm-powerpc/mmu-44x.h
+++ b/include/asm-powerpc/mmu-44x.h
@@ -64,7 +64,13 @@
 
 #endif /* !__ASSEMBLY__ */
 
+#ifndef CONFIG_PPC_EARLY_DEBUG_44x
 #define PPC44x_EARLY_TLBS	1
+#else
+#define PPC44x_EARLY_TLBS	2
+#define PPC44x_EARLY_DEBUG_VIRTADDR	(ASM_CONST(0xf0000000) \
+	| (ASM_CONST(CONFIG_PPC_EARLY_DEBUG_44x_PHYSLOW) & 0xffff))
+#endif
 
 /* Size of the TLBs used for pinning in lowmem */
 #define PPC_PIN_SIZE	(1 << 28)	/* 256M */
diff --git a/include/asm-powerpc/udbg.h b/include/asm-powerpc/udbg.h
index d03d855..ce9d82f 100644
--- a/include/asm-powerpc/udbg.h
+++ b/include/asm-powerpc/udbg.h
@@ -47,6 +47,7 @@
 extern void __init udbg_init_rtas_console(void);
 extern void __init udbg_init_debug_beat(void);
 extern void __init udbg_init_btext(void);
+extern void __init udbg_init_44x_as1(void);
 
 #endif /* __KERNEL__ */
 #endif /* _ASM_POWERPC_UDBG_H */