diff -urpN -X ../dontdiff linux-2.6.18-rc4-dma3/include/asm-arm/arch-s3c2410/map.h linux-2.6.18-rc4-dma4/include/asm-arm/arch-s3c2410/map.h
--- linux-2.6.18-rc4-dma3/include/asm-arm/arch-s3c2410/map.h	2006-08-11 15:42:22.000000000 +0100
+++ linux-2.6.18-rc4-dma4/include/asm-arm/arch-s3c2410/map.h	2006-08-11 20:51:37.000000000 +0100
@@ -167,6 +167,11 @@
 #define S3C2440_PA_CAMIF   (0x4F000000)
 #define S3C2440_SZ_CAMIF   SZ_1M
 
+/* AC97 */
+
+#define S3C2440_PA_AC97	   (0x5B000000)
+#define S3C2440_SZ_AC97	   SZ_1M
+
 /* ISA style IO, for each machine to sort out mappings for, if it
  * implements it. We reserve two 16M regions for ISA.
  */
diff -urpN -X ../dontdiff linux-2.6.18-rc4-dma3/include/asm-arm/arch-s3c2410/regs-ac97.h linux-2.6.18-rc4-dma4/include/asm-arm/arch-s3c2410/regs-ac97.h
--- linux-2.6.18-rc4-dma3/include/asm-arm/arch-s3c2410/regs-ac97.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.18-rc4-dma4/include/asm-arm/arch-s3c2410/regs-ac97.h	2006-08-11 20:49:22.000000000 +0100
@@ -0,0 +1,23 @@
+/* linux/include/asm-arm/arch-s3c2410/regs-ac97.h
+ *
+ * Copyright (c) 2006 Simtec Electronics <linux@simtec.co.uk>
+ *		http://www.simtec.co.uk/products/SWLINUX/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * S3C2440 AC97 Controller
+*/
+
+#ifndef __ASM_ARCH_REGS_AC97_H
+#define __ASM_ARCH_REGS_AC97_H __FILE__
+
+#define S3C_AC97_GLBCTRL	(0x00)
+#define S3C_AC97_GLBSTAT	(0x04)
+#define S3C_AC97_CODEC_CMD	(0x08)
+#define S3C_AC97_PCM_ADDR	(0x10)
+#define S3C_AC97_PCM_DATA	(0x18)
+#define S3C_AC97_MIC_DATA	(0x1C)
+
+#endif /* __ASM_ARCH_REGS_AC97_H */