--- a/arch/x86/boot/boot.h
+++ b/arch/x86/boot/boot.h
@@ -62,7 +62,7 @@ static inline void outl(u32 v, u16 port)
 {
 	asm volatile("outl %0,%1" : : "a" (v), "dN" (port));
 }
-static inline u32 inl(u32 port)
+static inline u32 inl(u16 port)
 {
 	u32 v;
 	asm volatile("inl %1,%0" : "=a" (v) : "dN" (port));
--- a/arch/x86/boot/pm.c
+++ b/arch/x86/boot/pm.c
@@ -14,6 +14,9 @@
 
 #include "boot.h"
 #include <asm/segment.h>
+#ifdef CONFIG_X86_RDC321X
+#include <asm/rdc321x_defs.h>
+#endif
 
 /*
  * Invoke the realmode switch hook if present; otherwise
@@ -112,6 +115,16 @@ void go_to_protected_mode(void)
 		die();
 	}
 
+#ifdef CONFIG_X86_RDC321X
+	{
+		u32 bootctl;
+
+		outl(0x80003840, RDC3210_CFGREG_ADDR);
+		bootctl = inl(RDC3210_CFGREG_DATA) | 0x07ff0000;
+		outl(bootctl, RDC3210_CFGREG_DATA);
+	}
+#endif
+
 	/* Reset coprocessor (IGNNE#) */
 	reset_coprocessor();