diff --git a/board/amcc/luan/luan.c b/board/amcc/luan/luan.c
index b28ebf9..de3e3d8 100644
--- a/board/amcc/luan/luan.c
+++ b/board/amcc/luan/luan.c
@@ -25,6 +25,7 @@
 #include <command.h>
 #include <ppc4xx.h>
 #include <asm/processor.h>
+#include <asm/ppc4xx-isram.h>
 #include <spd_sdram.h>
 #include "epld.h"
 
@@ -255,7 +256,7 @@ static int on_off( const char *s )
  ************************************************************************/
 static void l2cache_disable(void)
 {
-	mtdcr( l2_cache_cfg, 0 );
+	mtdcr( L2_CACHE_CFG, 0 );
 }
 
 
@@ -265,24 +266,24 @@ static void l2cache_disable(void)
  ************************************************************************/
 static void l2cache_enable(void)	/* see p258 7.4.1 Enabling L2 Cache */
 {
-	mtdcr( l2_cache_cfg, 0x80000000 );	/* enable L2_MODE L2_CFG[L2M] */
+	mtdcr( L2_CACHE_CFG, 0x80000000 );	/* enable L2_MODE L2_CFG[L2M] */
 
-	mtdcr( l2_cache_addr, 0 );		/* set L2_ADDR with all zeros */
+	mtdcr( L2_CACHE_ADDR, 0 );		/* set L2_ADDR with all zeros */
 
-	mtdcr( l2_cache_cmd, 0x80000000 );	/* issue HCLEAR command via L2_CMD */
+	mtdcr( L2_CACHE_CMD, 0x80000000 );	/* issue HCLEAR command via L2_CMD */
 
-	while (!(mfdcr( l2_cache_stat ) & 0x80000000 ))  ;; /* poll L2_SR for completion */
+	while (!(mfdcr( L2_CACHE_STAT ) & 0x80000000 ))  ;; /* poll L2_SR for completion */
 
-	mtdcr( l2_cache_cmd, 0x10000000 );	/* clear cache errors L2_CMD[CCP] */
+	mtdcr( L2_CACHE_CMD, 0x10000000 );	/* clear cache errors L2_CMD[CCP] */
 
-	mtdcr( l2_cache_cmd, 0x08000000 );	/* clear tag errors L2_CMD[CTE] */
+	mtdcr( L2_CACHE_CMD, 0x08000000 );	/* clear tag errors L2_CMD[CTE] */
 
-	mtdcr( l2_cache_snp0, 0 );		/* snoop registers */
-	mtdcr( l2_cache_snp1, 0 );
+	mtdcr( L2_CACHE_SNP0, 0 );		/* snoop registers */
+	mtdcr( L2_CACHE_SNP1, 0 );
 
 	__asm__ volatile ("sync");		/* msync */
 
-	mtdcr( l2_cache_cfg, 0xe0000000 );	/* inst and data use L2 */
+	mtdcr( L2_CACHE_CFG, 0xe0000000 );	/* inst and data use L2 */
 
 	__asm__ volatile ("sync");
 }
@@ -294,7 +295,7 @@ static void l2cache_enable(void)	/* see p258 7.4.1 Enabling L2 Cache */
  ************************************************************************/
 static int l2cache_status(void)
 {
-	return  (mfdcr( l2_cache_cfg ) & 0x60000000) != 0;
+	return  (mfdcr( L2_CACHE_CFG ) & 0x60000000) != 0;
 }
 
 
diff --git a/cpu/ppc4xx/start.S b/cpu/ppc4xx/start.S
index 84d7a28..db34e84 100644
--- a/cpu/ppc4xx/start.S
+++ b/cpu/ppc4xx/start.S
@@ -72,6 +72,7 @@
 
 #include <asm/cache.h>
 #include <asm/mmu.h>
+#include <asm/ppc4xx-isram.h>
 
 #ifndef	 CONFIG_IDENT_STRING
 #define	 CONFIG_IDENT_STRING ""
@@ -679,65 +680,65 @@ _start:
     defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \
     defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
     defined(CONFIG_460SX)
-	mtdcr	l2_cache_cfg,r0		/* Ensure L2 Cache is off */
+	mtdcr	L2_CACHE_CFG,r0		/* Ensure L2 Cache is off */
 #endif
 
 	lis	r2,0x7fff
 	ori	r2,r2,0xffff
-	mfdcr	r1,isram0_dpc
+	mfdcr	r1,ISRAM0_DPC
 	and	r1,r1,r2		/* Disable parity check */
-	mtdcr	isram0_dpc,r1
-	mfdcr	r1,isram0_pmeg
+	mtdcr	ISRAM0_DPC,r1
+	mfdcr	r1,ISRAM0_PMEG
 	and	r1,r1,r2		/* Disable pwr mgmt */
-	mtdcr	isram0_pmeg,r1
+	mtdcr	ISRAM0_PMEG,r1
 
 	lis	r1,0x8000		/* BAS = 8000_0000 */
 #if defined(CONFIG_440GX) || defined(CONFIG_440SP)
 	ori	r1,r1,0x0980		/* first 64k */
-	mtdcr	isram0_sb0cr,r1
+	mtdcr	ISRAM0_SB0CR,r1
 	lis	r1,0x8001
 	ori	r1,r1,0x0980		/* second 64k */
-	mtdcr	isram0_sb1cr,r1
+	mtdcr	ISRAM0_SB1CR,r1
 	lis	r1, 0x8002
 	ori	r1,r1, 0x0980		/* third 64k */
-	mtdcr	isram0_sb2cr,r1
+	mtdcr	ISRAM0_SB2CR,r1
 	lis	r1, 0x8003
 	ori	r1,r1, 0x0980		/* fourth 64k */
-	mtdcr	isram0_sb3cr,r1
+	mtdcr	ISRAM0_SB3CR,r1
 #elif defined(CONFIG_440SPE)
 	lis	r1,0x0000		/* BAS = 0000_0000 */
 	ori	r1,r1,0x0984		/* first 64k */
-	mtdcr	isram0_sb0cr,r1
+	mtdcr	ISRAM0_SB0CR,r1
 	lis	r1,0x0001
 	ori	r1,r1,0x0984		/* second 64k */
-	mtdcr	isram0_sb1cr,r1
+	mtdcr	ISRAM0_SB1CR,r1
 	lis	r1, 0x0002
 	ori	r1,r1, 0x0984		/* third 64k */
-	mtdcr	isram0_sb2cr,r1
+	mtdcr	ISRAM0_SB2CR,r1
 	lis	r1, 0x0003
 	ori	r1,r1, 0x0984		/* fourth 64k */
-	mtdcr	isram0_sb3cr,r1
+	mtdcr	ISRAM0_SB3CR,r1
 #elif defined(CONFIG_460EX) || defined(CONFIG_460GT)
 	lis	r1,0x4000		/* BAS = 8000_0000 */
 	ori	r1,r1,0x4580		/* 16k */
-	mtdcr	isram0_sb0cr,r1
+	mtdcr	ISRAM0_SB0CR,r1
 #elif defined(CONFIG_460SX)
 	lis     r1,0x0000               /* BAS = 0000_0000 */
 	ori     r1,r1,0x0B84            /* first 128k */
-	mtdcr   isram0_sb0cr,r1
+	mtdcr   ISRAM0_SB0CR,r1
 	lis     r1,0x0001
 	ori     r1,r1,0x0B84            /* second 128k */
-	mtdcr   isram0_sb1cr,r1
+	mtdcr   ISRAM0_SB1CR,r1
 	lis     r1, 0x0002
 	ori     r1,r1, 0x0B84           /* third 128k */
-	mtdcr   isram0_sb2cr,r1
+	mtdcr   ISRAM0_SB2CR,r1
 	lis     r1, 0x0003
 	ori     r1,r1, 0x0B84           /* fourth 128k */
-	mtdcr   isram0_sb3cr,r1
+	mtdcr   ISRAM0_SB3CR,r1
 #elif defined(CONFIG_440GP)
 	ori	r1,r1,0x0380		/* 8k rw */
-	mtdcr	isram0_sb0cr,r1
-	mtdcr	isram0_sb1cr,r0		/* Disable bank 1 */
+	mtdcr	ISRAM0_SB0CR,r1
+	mtdcr	ISRAM0_SB1CR,r0		/* Disable bank 1 */
 #endif
 #endif /* #if !defined(CONFIG_440EP) && !defined(CONFIG_440GR) */
 
diff --git a/include/asm-ppc/ppc4xx-isram.h b/include/asm-ppc/ppc4xx-isram.h
new file mode 100644
index 0000000..d6d17ac
--- /dev/null
+++ b/include/asm-ppc/ppc4xx-isram.h
@@ -0,0 +1,75 @@
+
+/*
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#ifndef _PPC4xx_ISRAM_H_
+#define _PPC4xx_ISRAM_H_
+
+/*
+ * Internal SRAM
+ */
+#if defined(CONFIG_440EPX) || defined(CONFIG_440GRX)
+#define ISRAM0_DCR_BASE 0x380
+#else
+#define ISRAM0_DCR_BASE 0x020
+#endif
+#define ISRAM0_SB0CR	(ISRAM0_DCR_BASE+0x00)	/* SRAM bank config 0*/
+#define ISRAM0_SB1CR	(ISRAM0_DCR_BASE+0x01)	/* SRAM bank config 1*/
+#define ISRAM0_SB2CR	(ISRAM0_DCR_BASE+0x02)	/* SRAM bank config 2*/
+#define ISRAM0_SB3CR	(ISRAM0_DCR_BASE+0x03)	/* SRAM bank config 3*/
+#define ISRAM0_BEAR	(ISRAM0_DCR_BASE+0x04)	/* SRAM bus error addr reg */
+#define ISRAM0_BESR0	(ISRAM0_DCR_BASE+0x05)	/* SRAM bus error status reg 0 */
+#define ISRAM0_BESR1	(ISRAM0_DCR_BASE+0x06)	/* SRAM bus error status reg 1 */
+#define ISRAM0_PMEG	(ISRAM0_DCR_BASE+0x07)	/* SRAM power management */
+#define ISRAM0_CID	(ISRAM0_DCR_BASE+0x08)	/* SRAM bus core id reg */
+#define ISRAM0_REVID	(ISRAM0_DCR_BASE+0x09)	/* SRAM bus revision id reg */
+#define ISRAM0_DPC	(ISRAM0_DCR_BASE+0x0a)	/* SRAM data parity check reg */
+
+#if defined(CONFIG_460EX) || defined(CONFIG_460GT)
+#define ISRAM1_DCR_BASE 0x0B0
+#define ISRAM1_SB0CR	(ISRAM1_DCR_BASE+0x00)	/* SRAM1 bank config 0*/
+#define ISRAM1_BEAR	(ISRAM1_DCR_BASE+0x04)	/* SRAM1 bus error addr reg */
+#define ISRAM1_BESR0	(ISRAM1_DCR_BASE+0x05)	/* SRAM1 bus error status reg 0 */
+#define ISRAM1_BESR1	(ISRAM1_DCR_BASE+0x06)	/* SRAM1 bus error status reg 1 */
+#define ISRAM1_PMEG	(ISRAM1_DCR_BASE+0x07)	/* SRAM1 power management */
+#define ISRAM1_CID	(ISRAM1_DCR_BASE+0x08)	/* SRAM1 bus core id reg */
+#define ISRAM1_REVID	(ISRAM1_DCR_BASE+0x09)	/* SRAM1 bus revision id reg */
+#define ISRAM1_DPC	(ISRAM1_DCR_BASE+0x0a)	/* SRAM1 data parity check reg */
+#endif /* CONFIG_460EX || CONFIG_460GT */
+
+/*
+ * L2 Cache
+ */
+#if defined (CONFIG_440GX) || \
+    defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \
+    defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
+    defined(CONFIG_460SX)
+#define L2_CACHE_BASE	0x030
+#define L2_CACHE_CFG	(L2_CACHE_BASE+0x00)	/* L2 Cache Config      */
+#define L2_CACHE_CMD	(L2_CACHE_BASE+0x01)	/* L2 Cache Command     */
+#define L2_CACHE_ADDR	(L2_CACHE_BASE+0x02)	/* L2 Cache Address     */
+#define L2_CACHE_DATA	(L2_CACHE_BASE+0x03)	/* L2 Cache Data        */
+#define L2_CACHE_STAT	(L2_CACHE_BASE+0x04)	/* L2 Cache Status      */
+#define L2_CACHE_CVER	(L2_CACHE_BASE+0x05)	/* L2 Cache Revision ID */
+#define L2_CACHE_SNP0	(L2_CACHE_BASE+0x06)	/* L2 Cache Snoop reg 0 */
+#define L2_CACHE_SNP1	(L2_CACHE_BASE+0x07)	/* L2 Cache Snoop reg 1 */
+#endif /* CONFIG_440GX */
+
+#endif /* _PPC4xx_ISRAM_H_ */
diff --git a/include/ppc440.h b/include/ppc440.h
index 4d2157a..01f6eaf 100644
--- a/include/ppc440.h
+++ b/include/ppc440.h
@@ -607,45 +607,6 @@
 
 #endif /* 440EP || 440GR || 440EPX || 440GRX */
 
-/*-----------------------------------------------------------------------------
- | L2 Cache
- +----------------------------------------------------------------------------*/
-#if defined (CONFIG_440GX) || \
-    defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \
-    defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
-    defined(CONFIG_460SX)
-#define L2_CACHE_BASE	0x030
-#define l2_cache_cfg	(L2_CACHE_BASE+0x00)	/* L2 Cache Config	*/
-#define l2_cache_cmd	(L2_CACHE_BASE+0x01)	/* L2 Cache Command	*/
-#define l2_cache_addr	(L2_CACHE_BASE+0x02)	/* L2 Cache Address	*/
-#define l2_cache_data	(L2_CACHE_BASE+0x03)	/* L2 Cache Data	*/
-#define l2_cache_stat	(L2_CACHE_BASE+0x04)	/* L2 Cache Status	*/
-#define l2_cache_cver	(L2_CACHE_BASE+0x05)	/* L2 Cache Revision ID */
-#define l2_cache_snp0	(L2_CACHE_BASE+0x06)	/* L2 Cache Snoop reg 0 */
-#define l2_cache_snp1	(L2_CACHE_BASE+0x07)	/* L2 Cache Snoop reg 1 */
-
-#endif /* CONFIG_440GX */
-
-/*-----------------------------------------------------------------------------
- | Internal SRAM
- +----------------------------------------------------------------------------*/
-#if defined(CONFIG_440EPX) || defined(CONFIG_440GRX)
-#define ISRAM0_DCR_BASE 0x380
-#else
-#define ISRAM0_DCR_BASE 0x020
-#endif
-#define isram0_sb0cr	(ISRAM0_DCR_BASE+0x00)	/* SRAM bank config 0*/
-#define isram0_sb1cr	(ISRAM0_DCR_BASE+0x01)	/* SRAM bank config 1*/
-#define isram0_sb2cr	(ISRAM0_DCR_BASE+0x02)	/* SRAM bank config 2*/
-#define isram0_sb3cr	(ISRAM0_DCR_BASE+0x03)	/* SRAM bank config 3*/
-#define isram0_bear	(ISRAM0_DCR_BASE+0x04)	/* SRAM bus error addr reg */
-#define isram0_besr0	(ISRAM0_DCR_BASE+0x05)	/* SRAM bus error status reg 0 */
-#define isram0_besr1	(ISRAM0_DCR_BASE+0x06)	/* SRAM bus error status reg 1 */
-#define isram0_pmeg	(ISRAM0_DCR_BASE+0x07)	/* SRAM power management */
-#define isram0_cid	(ISRAM0_DCR_BASE+0x08)	/* SRAM bus core id reg */
-#define isram0_revid	(ISRAM0_DCR_BASE+0x09)	/* SRAM bus revision id reg */
-#define isram0_dpc	(ISRAM0_DCR_BASE+0x0a)	/* SRAM data parity check reg */
-
 #if defined(CONFIG_440EP) || defined(CONFIG_440GR) || \
     defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
     defined(CONFIG_460EX) || defined(CONFIG_460GT)