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diff --git a/include/asm-nios/io.h b/include/asm-nios/io.h
index 3cdb7039ff..6fc339fb01 100644
--- a/include/asm-nios/io.h
+++ b/include/asm-nios/io.h
@@ -1 +1,138 @@
-/*FIXME: Implement this! */
+/*
+ * (C) Copyright 2003, Psyent Corporation <www.psyent.com>
+ * Scott McNutt <smcnutt@psyent.com>
+ *
+ * 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 __ASM_NIOS_IO_H_
+#define __ASM_NIOS_IO_H_
+
+#define __raw_writeb(v,a)       (*(volatile unsigned char  *)(a) = (v))
+#define __raw_writew(v,a)       (*(volatile unsigned short *)(a) = (v))
+#define __raw_writel(v,a)       (*(volatile unsigned int   *)(a) = (v))
+
+#define __raw_readb(a)          (*(volatile unsigned char  *)(a))
+#define __raw_readw(a)          (*(volatile unsigned short *)(a))
+#define __raw_readl(a)          (*(volatile unsigned int   *)(a))
+
+#define readb(addr)\
+	({unsigned char val;\
+	 asm volatile(  "	pfxio	0		\n"\
+		 	"	ld	%0, [%1]	\n"\
+			"	ext8d	%0, %1		\n"\
+			:"=r"(val) : "r" (addr)); val;})
+
+#define readw(addr)\
+	({unsigned short val;\
+	 asm volatile(  "	pfxio	0		\n"\
+		 	"	ld	%0, [%1]	\n"\
+			"	ext16d	%0, %1		\n"\
+			:"=r"(val) : "r" (addr)); val;})
+
+#define readl(addr)\
+	({unsigned long val;\
+	 asm volatile(  "	pfxio	0		\n"\
+		 	"	ld	%0, [%1]	\n"\
+			:"=r"(val) : "r" (addr)); val;})
+
+#define writeb(addr,val)\
+	asm volatile (	"	fill8	%%r0, %1	\n"\
+			"	st8d	[%0], %%r0	\n"\
+			: : "r" (addr), "r" (val) : "r0")
+
+#define writew(addr,val)\
+	asm volatile (	"	fill16	%%r0, %1	\n"\
+			"	st16d	[%0], %%r0	\n"\
+			: : "r" (addr), "r" (val) : "r0")
+
+#define writel(addr,val)\
+	asm volatile (	"	st	[%0], %1	\n"\
+			: : "r" (addr), "r" (val))
+
+#define inb(addr)	readb(addr)
+#define inw(addr)	readw(addr)
+#define inl(addr)	readl(addr)
+#define outb(val,addr)	writeb(addr,val)
+#define outw(val,addr)	writew(addr,val)
+#define outl(val,addr)	writel(addr,val)
+
+static inline void insb (unsigned long port, void *dst, unsigned long count)
+{
+	unsigned char *p = dst;
+	while (count--) *p++ = inb (port);
+}
+static inline void insw (unsigned long port, void *dst, unsigned long count)
+{
+	unsigned short *p = dst;
+	while (count--) *p++ = inw (port);
+}
+static inline void insl (unsigned long port, void *dst, unsigned long count)
+{
+	unsigned long *p = dst;
+	while (count--) *p++ = inl (port);
+}
+
+static inline void outsb (unsigned long port, const void *src, unsigned long count)
+{
+	const unsigned char *p = src;
+	while (count--) outb (*p++, port);
+}
+
+static inline void outsw (unsigned long port, const void *src, unsigned long count)
+{
+	const unsigned short *p = src;
+	while (count--) outw (*p++, port);
+}
+static inline void outsl (unsigned long port, const void *src, unsigned long count)
+{
+	const unsigned long *p = src;
+	while (count--) outl (*p++, port);
+}
+
+static inline void sync(void)
+{
+}
+
+/*
+ * Given a physical address and a length, return a virtual address
+ * that can be used to access the memory range with the caching
+ * properties specified by "flags".
+ */
+typedef unsigned long phys_addr_t;
+
+#define MAP_NOCACHE	(0)
+#define MAP_WRCOMBINE	(0)
+#define MAP_WRBACK	(0)
+#define MAP_WRTHROUGH	(0)
+
+static inline void *
+map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
+{
+	return (void *)paddr;
+}
+
+/*
+ * Take down a mapping set up by map_physmem().
+ */
+static inline void unmap_physmem(void *vaddr, unsigned long flags)
+{
+
+}
+
+#endif /* __ASM_NIOS_IO_H_ */