diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index bc3f00f..9579479 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -161,6 +161,12 @@ config ARCH_MMAP_RND_COMPAT_BITS_MIN
 config ARCH_MMAP_RND_COMPAT_BITS_MAX
        default 16
 
+config ARM64_INDIRECT_PIO
+	def_bool n
+	help
+	  Support to access the ISA I/O devices with the legacy X86 I/O port
+	  addresses in some SoCs, such as Hisilicon Hip06.
+
 config NO_IOPORT_MAP
 	def_bool y if !PCI
 
diff --git a/arch/arm64/include/asm/io.h b/arch/arm64/include/asm/io.h
index 9b6e408..d3acf1f 100644
--- a/arch/arm64/include/asm/io.h
+++ b/arch/arm64/include/asm/io.h
@@ -34,6 +34,10 @@
 
 #include <xen/xen.h>
 
+#ifdef CONFIG_ARM64_INDIRECT_PIO
+#include <linux/extio.h>
+#endif
+
 /*
  * Generic IO read/write.  These perform native-endian accesses.
  */
@@ -142,6 +146,38 @@ static inline u64 __raw_readq(const volatile void __iomem *addr)
 #define writel(v,c)		({ __iowmb(); writel_relaxed((v),(c)); })
 #define writeq(v,c)		({ __iowmb(); writeq_relaxed((v),(c)); })
 
+
+#define BUILDS_RW(bwl, type)						\
+static inline void reads##bwl(const volatile void __iomem *addr,	\
+				void *buffer, unsigned int count)	\
+{									\
+	if (count) {							\
+		type *buf = buffer;					\
+									\
+		do {							\
+			type x = __raw_read##bwl(addr);			\
+			*buf++ = x;					\
+		} while (--count);					\
+	}								\
+}									\
+									\
+static inline void writes##bwl(volatile void __iomem *addr,		\
+				const void *buffer, unsigned int count)	\
+{									\
+	if (count) {							\
+		const type *buf = buffer;				\
+									\
+		do {							\
+			__raw_write##bwl(*buf++, addr);			\
+		} while (--count);					\
+	}								\
+}
+
+BUILDS_RW(b, u8)
+#define readsb readsb
+#define writesb writesb
+
+
 /*
  *  I/O port access primitives.
  */
@@ -149,6 +185,60 @@ static inline u64 __raw_readq(const volatile void __iomem *addr)
 #define IO_SPACE_LIMIT		(PCI_IO_SIZE - 1)
 #define PCI_IOBASE		((void __iomem *)PCI_IO_START)
 
+
+/*
+ * redefine the in(s)b/out(s)b for indirect-IO.
+ */
+#define inb inb
+static inline u8 inb(unsigned long addr)
+{
+#ifdef CONFIG_ARM64_INDIRECT_PIO
+	if (arm64_extio_ops && arm64_extio_ops->start <= addr &&
+			addr <= arm64_extio_ops->end)
+		return extio_inb(addr);
+#endif
+	return readb(PCI_IOBASE + addr);
+}
+
+
+#define outb outb
+static inline void outb(u8 value, unsigned long addr)
+{
+#ifdef CONFIG_ARM64_INDIRECT_PIO
+	if (arm64_extio_ops && arm64_extio_ops->start <= addr &&
+			addr <= arm64_extio_ops->end)
+		extio_outb(value, addr);
+	else
+#endif
+		writeb(value, PCI_IOBASE + addr);
+}
+
+#define insb insb
+static inline void insb(unsigned long addr, void *buffer, unsigned int count)
+{
+#ifdef CONFIG_ARM64_INDIRECT_PIO
+	if (arm64_extio_ops && arm64_extio_ops->start <= addr &&
+			addr <= arm64_extio_ops->end)
+		extio_insb(addr, buffer, count);
+	else
+#endif
+		readsb(PCI_IOBASE + addr, buffer, count);
+}
+
+#define outsb outsb
+static inline void outsb(unsigned long addr, const void *buffer,
+			 unsigned int count)
+{
+#ifdef CONFIG_ARM64_INDIRECT_PIO
+	if (arm64_extio_ops && arm64_extio_ops->start <= addr &&
+			addr <= arm64_extio_ops->end)
+		extio_outsb(addr, buffer, count);
+	else
+#endif
+		writesb(PCI_IOBASE + addr, buffer, count);
+}
+
+
 /*
  * String version of I/O memory access operations.
  */
diff --git a/drivers/bus/extio.c b/drivers/bus/extio.c
new file mode 100644
index 0000000..1e7a9c5
--- /dev/null
+++ b/drivers/bus/extio.c
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2016 Hisilicon Limited, All Rights Reserved.
+ * Author: Zhichang Yuan <yuanzhichang@hisilicon.com>
+ * Author: Zou Rongrong <@huawei.com>
+ *
+ * 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.
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/io.h>
+
+
+struct extio_ops *arm64_extio_ops;
+
+
+u8 __weak extio_inb(unsigned long addr)
+{
+	return arm64_extio_ops->pfin ?
+		arm64_extio_ops->pfin(arm64_extio_ops->devpara,
+			addr + arm64_extio_ops->ptoffset, NULL,
+			sizeof(u8), 1) : -1;
+}
+
+void __weak extio_outb(u8 value, unsigned long addr)
+{
+	if (!arm64_extio_ops->pfout)
+		return;
+
+	arm64_extio_ops->pfout(arm64_extio_ops->devpara,
+			addr + arm64_extio_ops->ptoffset, &value,
+			sizeof(u8), 1);
+}
+
+
+void __weak extio_insb(unsigned long addr, void *buffer,
+				unsigned int count)
+{
+	if (!arm64_extio_ops->pfin)
+		return;
+
+	arm64_extio_ops->pfin(arm64_extio_ops->devpara,
+			addr + arm64_extio_ops->ptoffset, buffer,
+			sizeof(u8), count);
+}
+
+void __weak extio_outsb(unsigned long addr, const void *buffer,
+			 unsigned int count)
+{
+	if (!arm64_extio_ops->pfout)
+		return;
+
+	arm64_extio_ops->pfout(arm64_extio_ops->devpara,
+			addr + arm64_extio_ops->ptoffset, buffer,
+			sizeof(u8), count);
+}
+
+
diff --git a/include/linux/extio.h b/include/linux/extio.h
new file mode 100644
index 0000000..08d1fca
--- /dev/null
+++ b/include/linux/extio.h
@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2016 Hisilicon Limited, All Rights Reserved.
+ * Author: Zhichang Yuan <yuanzhichang@hisilicon.com>
+ * Author: Zou Rongrong <@huawei.com>
+ *
+ * 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.
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __LINUX_EXTIO_H
+#define __LINUX_EXTIO_H
+
+
+typedef u64 (*inhook)(void *devobj, unsigned long ptaddr, void *inbuf,
+				size_t dlen, unsigned int count);
+typedef void (*outhook)(void *devobj, unsigned long ptaddr,
+				const void *outbuf, size_t dlen,
+				unsigned int count);
+
+struct extio_ops {
+	unsigned long start;/* inclusive, sys io addr */
+	unsigned long end;/* inclusive, sys io addr */
+	unsigned long ptoffset;/* port Io - system Io */
+
+	inhook	pfin;
+	outhook	pfout;
+	void *devpara;
+};
+
+
+extern struct extio_ops *arm64_extio_ops;
+
+extern u8 extio_inb(unsigned long addr);
+extern void extio_outb(u8 value, unsigned long addr);
+extern void extio_insb(unsigned long addr, void *buffer, unsigned int count);
+extern void extio_outsb(unsigned long addr, const void *buffer,
+				unsigned int count);
+
+
+#endif /* __LINUX_EXTIO_H*/
