diff --git a/arch/mips/loongson/common/machtype.c b/arch/mips/loongson/common/machtype.c
index 0ed52b3f5314ccc1d9b4d6e3761c4f7467001a57..3799098e1e95158ab92d641bafbe148e53c8749b 100644
--- a/arch/mips/loongson/common/machtype.c
+++ b/arch/mips/loongson/common/machtype.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2009 Lemote Inc. & Insititute of Computing Technology
+ * Copyright (C) 2009 Lemote Inc.
  * Author: Wu Zhangjin, wuzj@lemote.com
  *
  * Copyright (c) 2009 Zhang Le <r0bertz@gentoo.org>
@@ -35,6 +35,10 @@ const char *get_system_type(void)
 	return system_types[mips_machtype];
 }
 
+void __weak __init mach_prom_init_machtype(void)
+{
+}
+
 void __init prom_init_machtype(void)
 {
 	char *p, str[MACHTYPE_LEN];
@@ -43,8 +47,10 @@ void __init prom_init_machtype(void)
 	mips_machtype = LOONGSON_MACHTYPE;
 
 	p = strstr(arcs_cmdline, "machtype=");
-	if (!p)
+	if (!p) {
+		mach_prom_init_machtype();
 		return;
+	}
 	p += strlen("machtype=");
 	strncpy(str, p, MACHTYPE_LEN);
 	p = strstr(str, " ");
diff --git a/arch/mips/loongson/lemote-2f/Makefile b/arch/mips/loongson/lemote-2f/Makefile
index 4d84b27dc41bd650b1beec909c017d8cbebda0a3..8699a53f0477ee5e14e50d76f7282415acec185e 100644
--- a/arch/mips/loongson/lemote-2f/Makefile
+++ b/arch/mips/loongson/lemote-2f/Makefile
@@ -2,7 +2,7 @@
 # Makefile for lemote loongson2f family machines
 #
 
-obj-y += irq.o reset.o ec_kb3310b.o
+obj-y += machtype.o irq.o reset.o ec_kb3310b.o
 
 #
 # Suspend Support
diff --git a/arch/mips/loongson/lemote-2f/machtype.c b/arch/mips/loongson/lemote-2f/machtype.c
new file mode 100644
index 0000000000000000000000000000000000000000..610f43173148f302c6ff5fb5aa24b2807fb230f1
--- /dev/null
+++ b/arch/mips/loongson/lemote-2f/machtype.c
@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2009 Lemote Inc.
+ * Author: Wu Zhangjin, wuzj@lemote.com
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+#include <asm/bootinfo.h>
+
+#include <loongson.h>
+
+void __init mach_prom_init_machtype(void)
+{
+	/* We share the same kernel image file among Lemote 2F family
+	 * of machines, and provide the machtype= kernel command line
+	 * to users to indicate their machine, this command line will
+	 * be passed by the latest PMON automatically. and fortunately,
+	 * up to now, we can get the machine type from the PMON_VER=
+	 * commandline directly except the NAS machine, In the old
+	 * machines, this will help the users a lot.
+	 *
+	 * If no "machtype=" passed, get machine type from "PMON_VER=".
+	 * 	PMON_VER=LM8089		Lemote 8.9'' netbook
+	 * 	         LM8101		Lemote 10.1'' netbook
+	 * 	(The above two netbooks have the same kernel support)
+	 *	         LM6XXX		Lemote FuLoong(2F) box series
+	 *	         LM9XXX		Lemote LynLoong PC series
+	 */
+	if (strstr(arcs_cmdline, "PMON_VER=LM")) {
+		if (strstr(arcs_cmdline, "PMON_VER=LM8"))
+			mips_machtype = MACH_LEMOTE_YL2F89;
+		else if (strstr(arcs_cmdline, "PMON_VER=LM6"))
+			mips_machtype = MACH_LEMOTE_FL2F;
+		else if (strstr(arcs_cmdline, "PMON_VER=LM9"))
+			mips_machtype = MACH_LEMOTE_LL2F;
+		else
+			mips_machtype = MACH_LEMOTE_NAS;
+
+		strcat(arcs_cmdline, " machtype=");
+		strcat(arcs_cmdline, get_system_type());
+		strcat(arcs_cmdline, " ");
+	}
+}