diff --git a/include/asm-mips/cpu.h b/include/asm-mips/cpu.h
index 107ccbe..54fc18a 100644
--- a/include/asm-mips/cpu.h
+++ b/include/asm-mips/cpu.h
@@ -157,76 +157,55 @@
 
 #define FPIR_IMP_NONE		0x0000
 
-#define CPU_UNKNOWN		 0
-#define CPU_R2000		 1
-#define CPU_R3000		 2
-#define CPU_R3000A		 3
-#define CPU_R3041		 4
-#define CPU_R3051		 5
-#define CPU_R3052		 6
-#define CPU_R3081		 7
-#define CPU_R3081E		 8
-#define CPU_R4000PC		 9
-#define CPU_R4000SC		10
-#define CPU_R4000MC		11
-#define CPU_R4200		12
-#define CPU_R4400PC		13
-#define CPU_R4400SC		14
-#define CPU_R4400MC		15
-#define CPU_R4600		16
-#define CPU_R6000		17
-#define CPU_R6000A		18
-#define CPU_R8000		19
-#define CPU_R10000		20
-#define CPU_R12000		21
-#define CPU_R4300		22
-#define CPU_R4650		23
-#define CPU_R4700		24
-#define CPU_R5000		25
-#define CPU_R5000A		26
-#define CPU_R4640		27
-#define CPU_NEVADA		28
-#define CPU_RM7000		29
-#define CPU_R5432		30
-#define CPU_4KC			31
-#define CPU_5KC			32
-#define CPU_R4310		33
-#define CPU_SB1			34
-#define CPU_TX3912		35
-#define CPU_TX3922		36
-#define CPU_TX3927		37
-#define CPU_AU1000		38
-#define CPU_4KEC		39
-#define CPU_4KSC		40
-#define CPU_VR41XX		41
-#define CPU_R5500		42
-#define CPU_TX49XX		43
-#define CPU_AU1500		44
-#define CPU_20KC		45
-#define CPU_VR4111		46
-#define CPU_VR4121		47
-#define CPU_VR4122		48
-#define CPU_VR4131		49
-#define CPU_VR4181		50
-#define CPU_VR4181A		51
-#define CPU_AU1100		52
-#define CPU_SR71000		53
-#define CPU_RM9000		54
-#define CPU_25KF		55
-#define CPU_VR4133		56
-#define CPU_AU1550		57
-#define CPU_24K			58
-#define CPU_AU1200		59
-#define CPU_34K			60
-#define CPU_PR4450		61
-#define CPU_SB1A		62
-#define CPU_74K			63
-#define CPU_R14000		64
-#define CPU_LOONGSON1           65
-#define CPU_LOONGSON2           66
-#define CPU_BCM3302		67
-#define CPU_BCM4710		68
-#define CPU_LAST		68
+enum cpu_type_enum {
+	CPU_UNKNOWN,
+
+	/*
+	 * R2000 class processors
+	 */
+	CPU_R2000, CPU_R3000, CPU_R3000A, CPU_R3041, CPU_R3051, CPU_R3052,
+	CPU_R3081, CPU_R3081E,
+
+	/*
+	 * R6000 class processors
+	 */
+	CPU_R6000, CPU_R6000A,
+
+	/*
+	 * R4000 class processors
+	 */
+	CPU_R4000PC, CPU_R4000SC, CPU_R4000MC, CPU_R4200, CPU_R4300, CPU_R4310,
+	CPU_R4400PC, CPU_R4400SC, CPU_R4400MC, CPU_R4600, CPU_R4640, CPU_R4650,
+	CPU_R4700, CPU_R5000, CPU_R5000A, CPU_R5500, CPU_NEVADA, CPU_R5432,
+	CPU_R10000, CPU_R12000, CPU_R14000, CPU_VR41XX, CPU_VR4111, CPU_VR4121,
+	CPU_VR4122, CPU_VR4131, CPU_VR4133, CPU_VR4181, CPU_VR4181A, CPU_RM7000,
+	CPU_SR71000, CPU_RM9000, CPU_TX49XX,
+
+	/*
+	 * R8000 class processors
+	 */
+	CPU_R8000,
+
+	/*
+	 * TX3900 class processors
+	 */
+	CPU_TX3912, CPU_TX3922, CPU_TX3927,
+
+	/*
+	 * MIPS32 class processors
+	 */
+	CPU_4KC, CPU_4KEC, CPU_4KSC, CPU_24K, CPU_34K, CPU_74K, CPU_AU1000,
+	CPU_AU1100, CPU_AU1200, CPU_AU1500, CPU_AU1550, CPU_PR4450,
+	CPU_BCM3302, CPU_BCM4710,
+
+	/*
+	 * MIPS64 class processors
+	 */
+	CPU_5KC, CPU_20KC, CPU_25KF, CPU_SB1, CPU_SB1A, CPU_LOONGSON2,
+
+	CPU_LAST
+};
+
 
 /*
  * ISA Level encodings