diff --git a/include/asm-mips/mach-db1x00/db1200.h b/include/asm-mips/mach-db1x00/db1200.h
index 5d894376fc1a9b0a58720537782f7511b296f159..647fdb54cc1dd31a6f699bbb1c7a651b4ccd1304 100644
--- a/include/asm-mips/mach-db1x00/db1200.h
+++ b/include/asm-mips/mach-db1x00/db1200.h
@@ -220,5 +220,8 @@ static BCSR * const bcsr = (BCSR *)BCSR_KSEG1_ADDR;
 #define BOARD_PC1_INT DB1200_PC1_INT
 #define BOARD_CARD_INSERTED(SOCKET) bcsr->sig_status & (1<<(8+(2*SOCKET)))
 
+/* Nand chip select */
+#define NAND_CS 1
+
 #endif /* __ASM_DB1200_H */
 
diff --git a/include/asm-mips/mach-db1x00/db1x00.h b/include/asm-mips/mach-db1x00/db1x00.h
index efafe65258b6eb664b766e8844b2766a07eb41ae..7b28b23f91ceefa28e1a8dd18ce82f64f90a96a3 100644
--- a/include/asm-mips/mach-db1x00/db1x00.h
+++ b/include/asm-mips/mach-db1x00/db1x00.h
@@ -200,6 +200,12 @@ typedef volatile struct
 			((NAND_T_PUL & 0xF)	<< NAND_T_PUL_SHIFT) | \
 			((NAND_T_SU  & 0xF)	<< NAND_T_SU_SHIFT)  | \
 			((NAND_T_WH  & 0xF)	<< NAND_T_WH_SHIFT)
+#define NAND_CS 1
+
+/* should be done by yamon */
+#define NAND_STCFG  0x00400005 /* 8-bit NAND */
+#define NAND_STTIME 0x00007774 /* valid for 396MHz SD=2 only */
+#define NAND_STADDR 0x12000FFF /* physical address 0x20000000 */
 
 #endif /* __ASM_DB1X00_H */
 
diff --git a/include/asm-mips/mach-pb1x00/pb1200.h b/include/asm-mips/mach-pb1x00/pb1200.h
index 9a3088b19bf3c0c934359ba7a66e6950a3dc1214..409d443322c1aab08baade0369c13980e91efc4f 100644
--- a/include/asm-mips/mach-pb1x00/pb1200.h
+++ b/include/asm-mips/mach-pb1x00/pb1200.h
@@ -248,5 +248,8 @@ static BCSR * const bcsr = (BCSR *)BCSR_KSEG1_ADDR;
 #define BOARD_PC1_INT PB1200_PC1_INT
 #define BOARD_CARD_INSERTED(SOCKET) bcsr->sig_status & (1<<(8+(2*SOCKET)))
 
+/* Nand chip select */
+#define NAND_CS 1
+
 #endif /* __ASM_PB1200_H */
 
diff --git a/include/asm-mips/mach-pb1x00/pb1550.h b/include/asm-mips/mach-pb1x00/pb1550.h
index 431d6088ea964bbb92ae2c7025dec6f6af8053ad..9578ead11e8a07825a8cfbc86ef21a88153ada54 100644
--- a/include/asm-mips/mach-pb1x00/pb1550.h
+++ b/include/asm-mips/mach-pb1x00/pb1550.h
@@ -166,4 +166,11 @@ static BCSR * const bcsr = (BCSR *)BCSR_PHYS_ADDR;
 			((NAND_T_SU  & 0xF)	<< NAND_T_SU_SHIFT)  | \
 			((NAND_T_WH  & 0xF)	<< NAND_T_WH_SHIFT)
 
+#define NAND_CS 1
+
+/* should be done by yamon */
+#define NAND_STCFG  0x00400005 /* 8-bit NAND */
+#define NAND_STTIME 0x00007774 /* valid for 396MHz SD=2 only */
+#define NAND_STADDR 0x12000FFF /* physical address 0x20000000 */
+
 #endif /* __ASM_PB1550_H */