diff --git a/include/asm-arm/arch-arm1136/sys_info.h b/include/asm-arm/arch-arm1136/sys_info.h
index ef301ba..53c231a 100644
--- a/include/asm-arm/arch-arm1136/sys_info.h
+++ b/include/asm-arm/arch-arm1136/sys_info.h
@@ -39,7 +39,8 @@
 	u32 cpu_rev;		/* rev of given cpu; ES1, ES2,...*/
 } h4_sys_data;
 
-#define SDR_DISCRETE      4
+#define XDR_POP           5      /* package on package part */
+#define SDR_DISCRETE      4      /* 128M memory SDR module*/
 #define DDR_STACKED       3      /* stacked part on 2422 */
 #define DDR_COMBO         2      /* combo part on cpu daughter card (menalaeus) */
 #define DDR_DISCRETE      1      /* 2x16 parts on daughter card */
@@ -50,16 +51,19 @@
 #define DDR_165           165    /* future parts */
 
 #define CPU_2420          0x2420
-#define CPU_2422          0x2422
+#define CPU_2422          0x2422 /* 2420 + 64M stacked */
+#define CPU_2423          0x2423 /* 2420 + 96M stacked */
 
 #define CPU_2422_ES1      1
 #define CPU_2422_ES2      2
 #define CPU_2420_ES1      1
 #define CPU_2420_ES2      2
+#define CPU_2420_2422_ES1 1
 
 #define CPU_2420_CHIPID   0x0B5D9000
 #define CPU_24XX_ID_MASK  0x0FFFF000
 #define CPU_242X_REV_MASK 0xF0000000
+#define CPU_242X_PID_MASK 0x000F0000
 
 #define BOARD_H4_MENELAUS 1
 #define BOARD_H4_SDP      2