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diff --git a/arch/ppc/include/asm/ppc4xx-isram.h b/arch/ppc/include/asm/ppc4xx-isram.h
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+
+/*
+ * 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_ */