diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 969ef88..b44070b 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -163,6 +163,12 @@ config ARCH_MMAP_RND_COMPAT_BITS_MIN
 config ARCH_MMAP_RND_COMPAT_BITS_MAX
        default 16
 
+config ARM64_INDIRECT_PIO
+	bool "access peripherals with legacy I/O port"
+	help
+	  Support special accessors for ISA I/O devices. This is needed for
+	  SoCs that do not support standard read/write for the ISA range.
+
 config NO_IOPORT_MAP
 	def_bool y if !PCI
 
diff --git a/arch/arm64/include/asm/extio.h b/arch/arm64/include/asm/extio.h
new file mode 100644
index 0000000..6ae0787
--- /dev/null
+++ b/arch/arm64/include/asm/extio.h
@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 2016 Hisilicon Limited, All Rights Reserved.
+ * Author: Zhichang Yuan <yuanzhichang@hisilicon.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
+
+struct extio_ops {
+	unsigned long start;/* inclusive, sys io addr */
+	unsigned long end;/* inclusive, sys io addr */
+
+	u64 (*pfin)(void *devobj, unsigned long ptaddr,	size_t dlen);
+	void (*pfout)(void *devobj, unsigned long ptaddr, u32 outval,
+					size_t dlen);
+	u64 (*pfins)(void *devobj, unsigned long ptaddr, void *inbuf,
+				size_t dlen, unsigned int count);
+	void (*pfouts)(void *devobj, unsigned long ptaddr,
+				const void *outbuf, size_t dlen,
+				unsigned int count);
+	void *devpara;
+};
+
+extern struct extio_ops *arm64_extio_ops;
+
+#define DECLARE_EXTIO(bw, type)						\
+extern type in##bw(unsigned long addr);					\
+extern void out##bw(type value, unsigned long addr);			\
+extern void ins##bw(unsigned long addr, void *buffer, unsigned int count);\
+extern void outs##bw(unsigned long addr, const void *buffer, unsigned int count);
+
+#define BUILD_EXTIO(bw, type)						\
+type in##bw(unsigned long addr)						\
+{									\
+	if (!arm64_extio_ops || arm64_extio_ops->start > addr ||	\
+			arm64_extio_ops->end < addr)			\
+		return read##bw(PCI_IOBASE + addr);			\
+	return arm64_extio_ops->pfin ?					\
+		arm64_extio_ops->pfin(arm64_extio_ops->devpara,		\
+			addr, sizeof(type)) : -1;			\
+}									\
+									\
+void out##bw(type value, unsigned long addr)				\
+{									\
+	if (!arm64_extio_ops || arm64_extio_ops->start > addr ||	\
+			arm64_extio_ops->end < addr)			\
+		write##bw(value, PCI_IOBASE + addr);			\
+	else								\
+		if (arm64_extio_ops->pfout)				\
+			arm64_extio_ops->pfout(arm64_extio_ops->devpara,\
+				addr, value, sizeof(type));		\
+}									\
+									\
+void ins##bw(unsigned long addr, void *buffer, unsigned int count)	\
+{									\
+	if (!arm64_extio_ops || arm64_extio_ops->start > addr ||	\
+			arm64_extio_ops->end < addr)			\
+		reads##bw(PCI_IOBASE + addr, buffer, count);		\
+	else								\
+		if (arm64_extio_ops->pfins)				\
+			arm64_extio_ops->pfins(arm64_extio_ops->devpara,\
+				addr, buffer, sizeof(type), count);	\
+}									\
+									\
+void outs##bw(unsigned long addr, const void *buffer, unsigned int count)	\
+{									\
+	if (!arm64_extio_ops || arm64_extio_ops->start > addr ||	\
+			arm64_extio_ops->end < addr)			\
+		writes##bw(PCI_IOBASE + addr, buffer, count);		\
+	else								\
+		if (arm64_extio_ops->pfouts)				\
+			arm64_extio_ops->pfouts(arm64_extio_ops->devpara,\
+				addr, buffer, sizeof(type), count);	\
+}
+
+static inline void arm64_set_extops(struct extio_ops *ops)
+{
+	if (ops)
+		WRITE_ONCE(arm64_extio_ops, ops);
+}
+
+#endif /* __LINUX_EXTIO_H*/
diff --git a/arch/arm64/include/asm/io.h b/arch/arm64/include/asm/io.h
index 0bba427..136735d 100644
--- a/arch/arm64/include/asm/io.h
+++ b/arch/arm64/include/asm/io.h
@@ -31,6 +31,7 @@
 #include <asm/early_ioremap.h>
 #include <asm/alternative.h>
 #include <asm/cpufeature.h>
+#include <asm/extio.h>
 
 #include <xen/xen.h>
 
@@ -149,6 +150,34 @@ 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.
+ */
+#ifdef CONFIG_ARM64_INDIRECT_PIO
+#define inb inb
+#define outb outb
+#define insb insb
+#define outsb outsb
+/* external declaration */
+DECLARE_EXTIO(b, u8)
+
+#define inw inw
+#define outw outw
+#define insw insw
+#define outsw outsw
+
+DECLARE_EXTIO(w, u16)
+
+#define inl inl
+#define outl outl
+#define insl insl
+#define outsl outsl
+
+DECLARE_EXTIO(l, u32)
+#endif
+
+
 /*
  * String version of I/O memory access operations.
  */
diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile
index 7d66bba..60e0482 100644
--- a/arch/arm64/kernel/Makefile
+++ b/arch/arm64/kernel/Makefile
@@ -31,6 +31,7 @@ arm64-obj-$(CONFIG_COMPAT)		+= sys32.o kuser32.o signal32.o 	\
 					   sys_compat.o entry32.o
 arm64-obj-$(CONFIG_FUNCTION_TRACER)	+= ftrace.o entry-ftrace.o
 arm64-obj-$(CONFIG_MODULES)		+= arm64ksyms.o module.o
+arm64-obj-$(CONFIG_ARM64_INDIRECT_PIO)	+= extio.o
 arm64-obj-$(CONFIG_ARM64_MODULE_PLTS)	+= module-plts.o
 arm64-obj-$(CONFIG_PERF_EVENTS)		+= perf_regs.o perf_callchain.o
 arm64-obj-$(CONFIG_HW_PERF_EVENTS)	+= perf_event.o
diff --git a/arch/arm64/kernel/extio.c b/arch/arm64/kernel/extio.c
new file mode 100644
index 0000000..647b3fa
--- /dev/null
+++ b/arch/arm64/kernel/extio.c
@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2016 Hisilicon Limited, All Rights Reserved.
+ * Author: Zhichang Yuan <yuanzhichang@hisilicon.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;
+
+
+BUILD_EXTIO(b, u8)
+
+BUILD_EXTIO(w, u16)
+
+BUILD_EXTIO(l, u32)
