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diff --git a/arch/mn10300/include/asm/io.h b/arch/mn10300/include/asm/io.h
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+/* MN10300 I/O port emulation and memory-mapped I/O
+ *
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+#ifndef _ASM_IO_H
+#define _ASM_IO_H
+
+#include <asm/page.h> /* I/O is all done through memory accesses */
+#include <asm/cpu-regs.h>
+#include <asm/cacheflush.h>
+
+#define mmiowb() do {} while (0)
+
+/*****************************************************************************/
+/*
+ * readX/writeX() are used to access memory mapped devices. On some
+ * architectures the memory mapped IO stuff needs to be accessed
+ * differently. On the x86 architecture, we just read/write the
+ * memory location directly.
+ */
+static inline u8 readb(const volatile void __iomem *addr)
+{
+ return *(const volatile u8 *) addr;
+}
+
+static inline u16 readw(const volatile void __iomem *addr)
+{
+ return *(const volatile u16 *) addr;
+}
+
+static inline u32 readl(const volatile void __iomem *addr)
+{
+ return *(const volatile u32 *) addr;
+}
+
+#define __raw_readb readb
+#define __raw_readw readw
+#define __raw_readl readl
+
+#define readb_relaxed readb
+#define readw_relaxed readw
+#define readl_relaxed readl
+
+static inline void writeb(u8 b, volatile void __iomem *addr)
+{
+ *(volatile u8 *) addr = b;
+}
+
+static inline void writew(u16 b, volatile void __iomem *addr)
+{
+ *(volatile u16 *) addr = b;
+}
+
+static inline void writel(u32 b, volatile void __iomem *addr)
+{
+ *(volatile u32 *) addr = b;
+}
+
+#define __raw_writeb writeb
+#define __raw_writew writew
+#define __raw_writel writel
+
+/*****************************************************************************/
+/*
+ * traditional input/output functions
+ */
+static inline u8 inb_local(unsigned long addr)
+{
+ return readb((volatile void __iomem *) addr);
+}
+
+static inline void outb_local(u8 b, unsigned long addr)
+{
+ return writeb(b, (volatile void __iomem *) addr);
+}
+
+static inline u8 inb(unsigned long addr)
+{
+ return readb((volatile void __iomem *) addr);
+}
+
+static inline u16 inw(unsigned long addr)
+{
+ return readw((volatile void __iomem *) addr);
+}
+
+static inline u32 inl(unsigned long addr)
+{
+ return readl((volatile void __iomem *) addr);
+}
+
+static inline void outb(u8 b, unsigned long addr)
+{
+ return writeb(b, (volatile void __iomem *) addr);
+}
+
+static inline void outw(u16 b, unsigned long addr)
+{
+ return writew(b, (volatile void __iomem *) addr);
+}
+
+static inline void outl(u32 b, unsigned long addr)
+{
+ return writel(b, (volatile void __iomem *) addr);
+}
+
+#define inb_p(addr) inb(addr)
+#define inw_p(addr) inw(addr)
+#define inl_p(addr) inl(addr)
+#define outb_p(x, addr) outb((x), (addr))
+#define outw_p(x, addr) outw((x), (addr))
+#define outl_p(x, addr) outl((x), (addr))
+
+static inline void insb(unsigned long addr, void *buffer, int count)
+{
+ if (count) {
+ u8 *buf = buffer;
+ do {
+ u8 x = inb(addr);
+ *buf++ = x;
+ } while (--count);
+ }
+}
+
+static inline void insw(unsigned long addr, void *buffer, int count)
+{
+ if (count) {
+ u16 *buf = buffer;
+ do {
+ u16 x = inw(addr);
+ *buf++ = x;
+ } while (--count);
+ }
+}
+
+static inline void insl(unsigned long addr, void *buffer, int count)
+{
+ if (count) {
+ u32 *buf = buffer;
+ do {
+ u32 x = inl(addr);
+ *buf++ = x;
+ } while (--count);
+ }
+}
+
+static inline void outsb(unsigned long addr, const void *buffer, int count)
+{
+ if (count) {
+ const u8 *buf = buffer;
+ do {
+ outb(*buf++, addr);
+ } while (--count);
+ }
+}
+
+static inline void outsw(unsigned long addr, const void *buffer, int count)
+{
+ if (count) {
+ const u16 *buf = buffer;
+ do {
+ outw(*buf++, addr);
+ } while (--count);
+ }
+}
+
+extern void __outsl(unsigned long addr, const void *buffer, int count);
+static inline void outsl(unsigned long addr, const void *buffer, int count)
+{
+ if ((unsigned long) buffer & 0x3)
+ return __outsl(addr, buffer, count);
+
+ if (count) {
+ const u32 *buf = buffer;
+ do {
+ outl(*buf++, addr);
+ } while (--count);
+ }
+}
+
+#define ioread8(addr) readb(addr)
+#define ioread16(addr) readw(addr)
+#define ioread32(addr) readl(addr)
+
+#define iowrite8(v, addr) writeb((v), (addr))
+#define iowrite16(v, addr) writew((v), (addr))
+#define iowrite32(v, addr) writel((v), (addr))
+
+#define ioread8_rep(p, dst, count) \
+ insb((unsigned long) (p), (dst), (count))
+#define ioread16_rep(p, dst, count) \
+ insw((unsigned long) (p), (dst), (count))
+#define ioread32_rep(p, dst, count) \
+ insl((unsigned long) (p), (dst), (count))
+
+#define iowrite8_rep(p, src, count) \
+ outsb((unsigned long) (p), (src), (count))
+#define iowrite16_rep(p, src, count) \
+ outsw((unsigned long) (p), (src), (count))
+#define iowrite32_rep(p, src, count) \
+ outsl((unsigned long) (p), (src), (count))
+
+
+#define IO_SPACE_LIMIT 0xffffffff
+
+#ifdef __KERNEL__
+
+#include <linux/vmalloc.h>
+#define __io_virt(x) ((void *) (x))
+
+/* Create a virtual mapping cookie for a PCI BAR (memory or IO) */
+struct pci_dev;
+extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max);
+static inline void pci_iounmap(struct pci_dev *dev, void __iomem *p)
+{
+}
+
+/*
+ * Change virtual addresses to physical addresses and vv.
+ * These are pretty trivial
+ */
+static inline unsigned long virt_to_phys(volatile void *address)
+{
+ return __pa(address);
+}
+
+static inline void *phys_to_virt(unsigned long address)
+{
+ return __va(address);
+}
+
+/*
+ * Change "struct page" to physical address.
+ */
+static inline void *__ioremap(unsigned long offset, unsigned long size,
+ unsigned long flags)
+{
+ return (void *) offset;
+}
+
+static inline void *ioremap(unsigned long offset, unsigned long size)
+{
+ return (void *) offset;
+}
+
+/*
+ * This one maps high address device memory and turns off caching for that
+ * area. it's useful if some control registers are in such an area and write
+ * combining or read caching is not desirable:
+ */
+static inline void *ioremap_nocache(unsigned long offset, unsigned long size)
+{
+ return (void *) (offset | 0x20000000);
+}
+
+#define ioremap_wc ioremap_nocache
+
+static inline void iounmap(void *addr)
+{
+}
+
+static inline void __iomem *ioport_map(unsigned long port, unsigned int nr)
+{
+ return (void __iomem *) port;
+}
+
+static inline void ioport_unmap(void __iomem *p)
+{
+}
+
+#define xlate_dev_kmem_ptr(p) ((void *) (p))
+#define xlate_dev_mem_ptr(p) ((void *) (p))
+
+/*
+ * PCI bus iomem addresses must be in the region 0x80000000-0x9fffffff
+ */
+static inline unsigned long virt_to_bus(volatile void *address)
+{
+ return ((unsigned long) address) & ~0x20000000;
+}
+
+static inline void *bus_to_virt(unsigned long address)
+{
+ return (void *) address;
+}
+
+#define page_to_bus page_to_phys
+
+#define memset_io(a, b, c) memset(__io_virt(a), (b), (c))
+#define memcpy_fromio(a, b, c) memcpy((a), __io_virt(b), (c))
+#define memcpy_toio(a, b, c) memcpy(__io_virt(a), (b), (c))
+
+#endif /* __KERNEL__ */
+
+#endif /* _ASM_IO_H */