Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

22 files changed, 987 insertions, 0 deletions

diff --git a/kernel/arch/xtensa/boot/.gitignore b/kernel/arch/xtensa/boot/.gitignore
new file mode 100644
index 000000000..be7655998
--- /dev/null
+++ b/kernel/arch/xtensa/boot/.gitignore
@@ -0,0 +1,3 @@
+uImage
+zImage.redboot
+*.dtb
diff --git a/kernel/arch/xtensa/boot/Makefile b/kernel/arch/xtensa/boot/Makefile
new file mode 100644
index 000000000..ca20a8920
--- /dev/null
+++ b/kernel/arch/xtensa/boot/Makefile
@@ -0,0 +1,44 @@
+#
+# arch/xtensa/boot/Makefile
+#
+# This file is subject to the terms and conditions of the GNU General Public
+# License.  See the file "COPYING" in the main directory of this archive
+# for more details.
+#
+#
+
+
+# KBUILD_CFLAGS used when building rest of boot (takes effect recursively)
+KBUILD_CFLAGS	+= -fno-builtin -Iarch/$(ARCH)/boot/include
+HOSTFLAGS	+= -Iarch/$(ARCH)/boot/include
+
+BIG_ENDIAN	:= $(shell echo __XTENSA_EB__ | $(CC) -E - | grep -v "\#")
+
+export ccflags-y
+export BIG_ENDIAN
+
+subdir-y	:= lib
+
+# Subdirs for the boot loader(s)
+
+bootdir-$(CONFIG_XTENSA_PLATFORM_ISS)	 += boot-elf
+bootdir-$(CONFIG_XTENSA_PLATFORM_XT2000) += boot-redboot boot-elf boot-uboot
+bootdir-$(CONFIG_XTENSA_PLATFORM_XTFPGA) += boot-redboot boot-elf boot-uboot
+
+zImage Image: $(bootdir-y)
+
+$(bootdir-y): $(addprefix $(obj)/,$(subdir-y)) \
+	      $(addprefix $(obj)/,$(host-progs))
+	$(Q)$(MAKE) $(build)=$(obj)/$@ $(MAKECMDGOALS)
+
+OBJCOPYFLAGS = --strip-all -R .comment -R .note.gnu.build-id -O binary
+
+vmlinux.bin: vmlinux FORCE
+	$(call if_changed,objcopy)
+
+vmlinux.bin.gz: vmlinux.bin FORCE
+	$(call if_changed,gzip)
+
+boot-elf: vmlinux.bin
+boot-redboot: vmlinux.bin.gz
+boot-uboot: vmlinux.bin.gz
diff --git a/kernel/arch/xtensa/boot/boot-elf/.gitignore b/kernel/arch/xtensa/boot/boot-elf/.gitignore
new file mode 100644
index 000000000..5ff8fbb85
--- /dev/null
+++ b/kernel/arch/xtensa/boot/boot-elf/.gitignore
@@ -0,0 +1 @@
+boot.lds
diff --git a/kernel/arch/xtensa/boot/boot-elf/Makefile b/kernel/arch/xtensa/boot/boot-elf/Makefile
new file mode 100644
index 000000000..89db089f5
--- /dev/null
+++ b/kernel/arch/xtensa/boot/boot-elf/Makefile
@@ -0,0 +1,34 @@
+#
+# This file is subject to the terms and conditions of the GNU General Public
+# License.  See the file "COPYING" in the main directory of this archive
+# for more details.
+#
+
+ifeq ($(BIG_ENDIAN),1)
+OBJCOPY_ARGS    := -O elf32-xtensa-be
+else
+OBJCOPY_ARGS    := -O elf32-xtensa-le
+endif
+
+export OBJCOPY_ARGS
+export CPPFLAGS_boot.lds += -P -C
+export KBUILD_AFLAGS += -mtext-section-literals
+
+boot-y		:= bootstrap.o
+
+OBJS		:= $(addprefix $(obj)/,$(boot-y))
+
+$(obj)/Image.o: vmlinux.bin $(OBJS)
+	$(Q)$(OBJCOPY) $(OBJCOPY_ARGS) -R .comment \
+		--add-section image=vmlinux.bin \
+		--set-section-flags image=contents,alloc,load,load,data \
+		$(OBJS) $@
+
+$(obj)/../Image.elf: $(obj)/Image.o $(obj)/boot.lds
+	$(Q)$(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) \
+		-T $(obj)/boot.lds \
+		--build-id=none \
+		-o $@ $(obj)/Image.o
+	$(Q)$(kecho) '  Kernel: $@ is ready'
+
+zImage:	$(obj)/../Image.elf
diff --git a/kernel/arch/xtensa/boot/boot-elf/boot.lds.S b/kernel/arch/xtensa/boot/boot-elf/boot.lds.S
new file mode 100644
index 000000000..958b33af9
--- /dev/null
+++ b/kernel/arch/xtensa/boot/boot-elf/boot.lds.S
@@ -0,0 +1,56 @@
+/*
+ *  linux/arch/xtensa/boot/boot-elf/boot.lds.S
+ *
+ *  Copyright (C) 2008 - 2013 by Tensilica Inc.
+ *
+ *  Chris Zankel <chris@zankel.net>
+ *  Marc Gauthier <marc@tensilica.com
+ *  Pete Delaney <piet@tensilica.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.
+ */
+
+#include <asm/vectors.h>
+OUTPUT_ARCH(xtensa)
+ENTRY(_ResetVector)
+
+SECTIONS
+{
+	.ResetVector.text XCHAL_RESET_VECTOR_VADDR :
+	{
+		*(.ResetVector.text)
+	}
+
+	.image KERNELOFFSET: AT (LOAD_MEMORY_ADDRESS)
+	{
+		_image_start = .;
+		*(image)
+		. = (. + 3) & ~ 3;
+		_image_end = .	;
+	}
+
+	.bss ((LOADADDR(.image) + SIZEOF(.image) + 3) & ~ 3):
+	{
+		__bss_start = .;
+		*(.sbss)
+		*(.scommon)
+		*(.dynbss)
+		*(.bss)
+		__bss_end = .;
+	}
+
+#ifdef CONFIG_MMU
+	/*
+	 * This is a remapped copy of the Reset Vector Code.
+	 * It keeps gdb in sync with the PC after switching
+	 * to the temporary mapping used while setting up
+	 * the V2 MMU mappings for Linux.
+	 */
+	.ResetVector.remapped_text 0x46000000 (INFO):
+	{
+		*(.ResetVector.remapped_text)
+	}
+#endif
+}
diff --git a/kernel/arch/xtensa/boot/boot-elf/bootstrap.S b/kernel/arch/xtensa/boot/boot-elf/bootstrap.S
new file mode 100644
index 000000000..9341a5750
--- /dev/null
+++ b/kernel/arch/xtensa/boot/boot-elf/bootstrap.S
@@ -0,0 +1,102 @@
+/*
+ * arch/xtensa/boot/boot-elf/bootstrap.S
+ *
+ * Low-level exception handling
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2004 - 2013 by Tensilica Inc.
+ *
+ * Chris Zankel <chris@zankel.net>
+ * Marc Gauthier <marc@tensilica.com>
+ * Piet Delaney <piet@tensilica.com>
+ */
+
+#include <asm/bootparam.h>
+#include <asm/processor.h>
+#include <asm/pgtable.h>
+#include <asm/page.h>
+#include <asm/cacheasm.h>
+#include <asm/initialize_mmu.h>
+#include <asm/vectors.h>
+#include <linux/linkage.h>
+
+	.section	.ResetVector.text, "ax"
+	.global         _ResetVector
+	.global         reset
+
+_ResetVector:
+	_j _SetupMMU
+
+	.begin  no-absolute-literals
+	.literal_position
+
+	.align 4
+RomInitAddr:
+	.word	LOAD_MEMORY_ADDRESS
+RomBootParam:
+	.word _bootparam
+_bootparam:
+	.short	BP_TAG_FIRST
+	.short	4
+	.long	BP_VERSION
+	.short	BP_TAG_LAST
+	.short	0
+	.long	0
+
+	.align  4
+_SetupMMU:
+	movi	a0, 0
+	wsr	a0, windowbase
+	rsync
+	movi	a0, 1
+	wsr	a0, windowstart
+	rsync
+	movi	a0, 0x1F
+	wsr	a0, ps
+	rsync
+
+	Offset = _SetupMMU - _ResetVector
+
+#ifndef CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX
+	initialize_mmu
+#endif
+
+	.end    no-absolute-literals
+
+	rsil    a0, XCHAL_DEBUGLEVEL-1
+	rsync
+reset:
+	l32r    a0, RomInitAddr
+	l32r	a2, RomBootParam
+	movi	a3, 0
+	movi	a4, 0
+	jx      a0
+
+#ifdef CONFIG_MMU
+	.align 4
+
+	.section	.ResetVector.remapped_text, "x"
+	.global         _RemappedResetVector
+
+	/* Do org before literals */
+	.org 0
+
+_RemappedResetVector:
+	.begin  no-absolute-literals
+	.literal_position
+
+	_j	_RemappedSetupMMU
+
+	/* Position Remapped code at the same location as the original code */
+	. = _RemappedResetVector + Offset
+
+_RemappedSetupMMU:
+#ifndef CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX
+	initialize_mmu
+#endif
+
+	.end    no-absolute-literals
+#endif
diff --git a/kernel/arch/xtensa/boot/boot-redboot/Makefile b/kernel/arch/xtensa/boot/boot-redboot/Makefile
new file mode 100644
index 000000000..8be8b9436
--- /dev/null
+++ b/kernel/arch/xtensa/boot/boot-redboot/Makefile
@@ -0,0 +1,35 @@
+#
+# This file is subject to the terms and conditions of the GNU General Public
+# License.  See the file "COPYING" in the main directory of this archive
+# for more details.
+#
+
+ifeq ($(BIG_ENDIAN),1)
+OBJCOPY_ARGS 	:= -O elf32-xtensa-be
+else
+OBJCOPY_ARGS 	:= -O elf32-xtensa-le
+endif
+
+LD_ARGS	= -T $(srctree)/$(obj)/boot.ld
+
+boot-y	:= bootstrap.o
+
+OBJS	:= $(addprefix $(obj)/,$(boot-y))
+LIBS	:= arch/xtensa/boot/lib/lib.a arch/xtensa/lib/lib.a
+
+LIBGCC := $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)
+
+$(obj)/zImage.o: vmlinux.bin.gz $(OBJS)
+	$(Q)$(OBJCOPY) $(OBJCOPY_ARGS) -R .comment \
+		--add-section image=vmlinux.bin.gz \
+		--set-section-flags image=contents,alloc,load,load,data \
+		$(OBJS) $@
+
+$(obj)/zImage.elf: $(obj)/zImage.o $(LIBS)
+	$(Q)$(LD) $(LD_ARGS) -o $@ $^ -L/xtensa-elf/lib $(LIBGCC)
+
+$(obj)/../zImage.redboot: $(obj)/zImage.elf
+	$(Q)$(OBJCOPY) -S -O binary $< $@
+	$(Q)$(kecho) '  Kernel: $@ is ready'
+
+zImage: $(obj)/../zImage.redboot
diff --git a/kernel/arch/xtensa/boot/boot-redboot/boot.ld b/kernel/arch/xtensa/boot/boot-redboot/boot.ld
new file mode 100644
index 000000000..b0b9e95b5
--- /dev/null
+++ b/kernel/arch/xtensa/boot/boot-redboot/boot.ld
@@ -0,0 +1,59 @@
+OUTPUT_ARCH(xtensa)
+
+SECTIONS
+{
+	.start 0xD1000000 : { *(.start) }
+
+	.text :
+	{
+		__reloc_start = . ;
+		_text_start = . ;
+		*(.literal .text.literal .text)
+		_text_end = . ;
+	}
+
+	.rodata ALIGN(0x04):
+	{
+		*(.rodata)
+		*(.rodata1)
+	}
+
+	.data ALIGN(0x04):
+	{
+		*(.data)
+		*(.data1)
+		*(.sdata)
+		*(.sdata2)
+		*(.got.plt)
+		*(.got)
+		*(.dynamic)
+	}
+
+	__reloc_end = . ;
+
+	. = ALIGN(0x10);
+	__image_load = . ;
+	.image 0xd0003000: AT(__image_load)
+	{
+		_image_start = .;
+		*(image)
+		. = (. + 3) & ~ 3;
+		_image_end = .	;
+	}
+
+
+	.bss ((LOADADDR(.image) + SIZEOF(.image) + 3) & ~ 3):
+	{
+		__bss_start = .;
+		*(.sbss)
+		*(.scommon)
+		*(.dynbss)
+		*(.bss)
+		__bss_end = .;
+	}
+	_end = .;
+	_param_start = .;
+
+
+	PROVIDE (end = .);
+}
diff --git a/kernel/arch/xtensa/boot/boot-redboot/bootstrap.S b/kernel/arch/xtensa/boot/boot-redboot/bootstrap.S
new file mode 100644
index 000000000..86c34dbc9
--- /dev/null
+++ b/kernel/arch/xtensa/boot/boot-redboot/bootstrap.S
@@ -0,0 +1,249 @@
+#include <variant/core.h>
+#include <asm/regs.h>
+#include <asm/asmmacro.h>
+#include <asm/cacheasm.h>
+	/*
+	 * RB-Data: RedBoot data/bss
+	 * P:	    Boot-Parameters
+	 * L:	    Kernel-Loader
+	 *
+	 * The Linux-Kernel image including the loader must be loaded
+	 * to a position so that the kernel and the boot parameters
+	 * can fit in the space before the load address.
+	 *  ______________________________________________________
+	 * |_RB-Data_|_P_|__________|_L_|___Linux-Kernel___|______|
+	 *                          ^
+	 *                          ^ Load address
+	 *  ______________________________________________________
+	 * |___Linux-Kernel___|_P_|_L_|___________________________|
+	 *
+	 * The loader copies the parameter to the position that will
+	 * be the end of the kernel and itself to the end of the
+	 * parameter list.
+	 */
+
+/* Make sure we have enough space for the 'uncompressor' */
+
+#define STACK_SIZE 32768
+#define HEAP_SIZE (131072*4)
+
+	# a2: Parameter list
+	# a3: Size of parameter list
+
+	.section .start, "ax"
+
+	.globl __start
+	/* this must be the first byte of the loader! */
+__start:
+	entry	sp, 32		# we do not intend to return
+	_call0	_start
+__start_a0:
+	.align 4
+
+	.section .text, "ax"
+	.begin literal_prefix .text
+
+	/* put literals in here! */
+
+	.globl _start
+_start:
+
+	/* 'reset' window registers */
+
+	movi	a4, 1
+	wsr	a4, ps
+	rsync
+
+	rsr	a5, windowbase
+	ssl	a5
+	sll	a4, a4
+	wsr	a4, windowstart
+	rsync
+
+	movi	a4, 0x00040000
+	wsr	a4, ps
+	rsync
+
+	/* copy the loader to its address
+	 * Note: The loader itself is a very small piece, so we assume we
+	 *       don't partially overlap. We also assume (even more important)
+	 *	 that the kernel image is out of the way. Usually, when the
+	 *	 load address of this image is not at an arbitrary address,
+	 *	 but aligned to some 10K's we shouldn't overlap.
+	 */
+
+	/* Note: The assembler cannot relax "addi a0, a0, ..." to an
+	   l32r, so we load to a4 first. */
+
+	# addi	a4, a0, __start - __start_a0
+	# mov	a0, a4
+
+	movi	a4, __start
+	movi	a5, __start_a0
+	add	a4, a0, a4
+	sub	a0, a4, a5
+
+	movi	a4, __start
+	movi	a5, __reloc_end
+
+	# a0: address where this code has been loaded
+	# a4: compiled address of __start
+	# a5: compiled end address
+
+	mov.n	a7, a0
+	mov.n	a8, a4
+
+1:
+	l32i	a10, a7, 0
+	l32i	a11, a7, 4
+	s32i	a10, a8, 0
+	s32i	a11, a8, 4
+	l32i	a10, a7, 8
+	l32i	a11, a7, 12
+	s32i	a10, a8, 8
+	s32i	a11, a8, 12
+	addi	a8, a8, 16
+	addi	a7, a7, 16
+	blt	a8, a5, 1b
+
+
+	/* We have to flush and invalidate the caches here before we jump. */
+
+#if XCHAL_DCACHE_IS_WRITEBACK
+
+	___flush_dcache_all a5 a6
+
+#endif
+
+	___invalidate_icache_all a5 a6
+	isync
+
+	movi	a11, _reloc
+	jx	a11
+
+	.globl _reloc
+_reloc:
+
+	/* RedBoot is now at the end of the memory, so we don't have
+	 * to copy the parameter list. Keep the code around; in case
+	 * we need it again. */
+#if 0
+	# a0: load address
+	# a2: start address of parameter list
+	# a3: length of parameter list
+	# a4: __start
+
+	/* copy the parameter list out of the way */
+
+	movi	a6, _param_start
+	add	a3, a2, a3
+2:
+	l32i	a8, a2, 0
+	s32i	a8, a6, 0
+	addi	a2, a2, 4
+	addi	a6, a6, 4
+	blt	a2, a3, 2b
+#endif
+
+	/* clear BSS section */
+	movi	a6, __bss_start
+	movi	a7, __bss_end
+	movi.n	a5, 0
+3:
+	s32i	a5, a6, 0
+	addi	a6, a6, 4
+	blt	a6, a7, 3b
+
+	movi	a5, -16
+	movi	a1, _stack + STACK_SIZE
+	and	a1, a1, a5
+
+	/* Uncompress the kernel */
+
+	# a0: load address
+	# a2: boot parameter
+	# a4: __start
+
+	movi	a3, __image_load
+	sub	a4, a3, a4
+	add	a8, a0, a4
+
+	# a1  Stack
+	# a8(a4)  Load address of the image
+
+	movi	a6, _image_start
+	movi	a10, _image_end
+	movi	a7, 0x1000000
+	sub	a11, a10, a6
+	movi	a9, complen
+	s32i	a11, a9, 0
+
+	movi	a0, 0
+
+	# a6 destination
+	# a7 maximum size of destination
+	# a8 source
+	# a9 ptr to length
+
+	.extern gunzip
+	movi	a4, gunzip
+	beqz	a4, 1f
+
+	callx4	a4
+
+	j	2f
+
+
+	# a6 destination start
+	# a7 maximum size of destination
+	# a8 source start
+	# a9 ptr to length
+	# a10 destination end
+
+1:
+        l32i    a9, a8, 0
+        l32i    a11, a8, 4
+        s32i    a9, a6, 0
+        s32i    a11, a6, 4
+        l32i    a9, a8, 8
+        l32i    a11, a8, 12
+        s32i    a9, a6, 8
+        s32i    a11, a6, 12
+        addi    a6, a6, 16
+        addi    a8, a8, 16
+        blt     a6, a10, 1b
+
+
+	/* jump to the kernel */
+2:
+#if XCHAL_DCACHE_IS_WRITEBACK
+
+	___flush_dcache_all a5 a6
+
+#endif
+
+	___invalidate_icache_all a5 a6
+
+	isync
+
+	# a2  Boot parameter list
+
+	movi	a0, _image_start
+	jx	a0
+
+	.align 16
+	.data
+	.globl avail_ram
+avail_ram:
+	.long	_heap
+	.globl end_avail
+end_avail:
+	.long	_heap + HEAP_SIZE
+
+	.comm _stack, STACK_SIZE
+	.comm _heap, HEAP_SIZE
+
+	.globl end_avail
+	.comm complen, 4
+
+	.end	literal_prefix
diff --git a/kernel/arch/xtensa/boot/boot-uboot/Makefile b/kernel/arch/xtensa/boot/boot-uboot/Makefile
new file mode 100644
index 000000000..403fcf234
--- /dev/null
+++ b/kernel/arch/xtensa/boot/boot-uboot/Makefile
@@ -0,0 +1,22 @@
+#
+# This file is subject to the terms and conditions of the GNU General Public
+# License.  See the file "COPYING" in the main directory of this archive
+# for more details.
+#
+
+ifdef CONFIG_MMU
+ifdef CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX
+UIMAGE_LOADADDR = 0x00003000
+else
+UIMAGE_LOADADDR = 0xd0003000
+endif
+else
+UIMAGE_LOADADDR = $(shell printf "0x%x" $$(( ${CONFIG_DEFAULT_MEM_START} + 0x3000 )) )
+endif
+UIMAGE_COMPRESSION = gzip
+
+$(obj)/../uImage: vmlinux.bin.gz FORCE
+	$(call if_changed,uimage)
+	$(Q)$(kecho) '  Kernel: $@ is ready'
+
+zImage: $(obj)/../uImage
diff --git a/kernel/arch/xtensa/boot/dts/Makefile b/kernel/arch/xtensa/boot/dts/Makefile
new file mode 100644
index 000000000..5f711bba8
--- /dev/null
+++ b/kernel/arch/xtensa/boot/dts/Makefile
@@ -0,0 +1,15 @@
+#
+# arch/xtensa/boot/dts/Makefile
+#
+# This file is subject to the terms and conditions of the GNU General Public
+# License.  See the file "COPYING" in the main directory of this archive
+# for more details.
+#
+#
+
+BUILTIN_DTB := $(patsubst "%",%,$(CONFIG_BUILTIN_DTB)).dtb.o
+ifneq ($(CONFIG_BUILTIN_DTB),"")
+obj-$(CONFIG_OF) += $(BUILTIN_DTB)
+endif
+
+clean-files := *.dtb.S
diff --git a/kernel/arch/xtensa/boot/dts/kc705.dts b/kernel/arch/xtensa/boot/dts/kc705.dts
new file mode 100644
index 000000000..c4d17a34a
--- /dev/null
+++ b/kernel/arch/xtensa/boot/dts/kc705.dts
@@ -0,0 +1,14 @@
+/dts-v1/;
+/include/ "xtfpga.dtsi"
+/include/ "xtfpga-flash-128m.dtsi"
+
+/ {
+	compatible = "cdns,xtensa-kc705";
+	chosen {
+		bootargs = "earlycon=uart8250,mmio32,0xfd050020,115200n8 console=ttyS0,115200n8 ip=dhcp root=/dev/nfs rw debug memmap=0x38000000";
+	};
+	memory@0 {
+		device_type = "memory";
+		reg = <0x00000000 0x38000000>;
+	};
+};
diff --git a/kernel/arch/xtensa/boot/dts/lx200mx.dts b/kernel/arch/xtensa/boot/dts/lx200mx.dts
new file mode 100644
index 000000000..249822b99
--- /dev/null
+++ b/kernel/arch/xtensa/boot/dts/lx200mx.dts
@@ -0,0 +1,16 @@
+/dts-v1/;
+/include/ "xtfpga.dtsi"
+/include/ "xtfpga-flash-16m.dtsi"
+
+/ {
+	compatible = "cdns,xtensa-lx200";
+	memory@0 {
+		device_type = "memory";
+		reg = <0x00000000 0x06000000>;
+	};
+	pic: pic {
+		compatible = "cdns,xtensa-mx";
+		#interrupt-cells = <2>;
+		interrupt-controller;
+	};
+};
diff --git a/kernel/arch/xtensa/boot/dts/lx60.dts b/kernel/arch/xtensa/boot/dts/lx60.dts
new file mode 100644
index 000000000..a0f8b8ad3
--- /dev/null
+++ b/kernel/arch/xtensa/boot/dts/lx60.dts
@@ -0,0 +1,11 @@
+/dts-v1/;
+/include/ "xtfpga.dtsi"
+/include/ "xtfpga-flash-4m.dtsi"
+
+/ {
+	compatible = "cdns,xtensa-lx60";
+	memory@0 {
+		device_type = "memory";
+		reg = <0x00000000 0x04000000>;
+	};
+};
diff --git a/kernel/arch/xtensa/boot/dts/ml605.dts b/kernel/arch/xtensa/boot/dts/ml605.dts
new file mode 100644
index 000000000..905c3a503
--- /dev/null
+++ b/kernel/arch/xtensa/boot/dts/ml605.dts
@@ -0,0 +1,11 @@
+/dts-v1/;
+/include/ "xtfpga.dtsi"
+/include/ "xtfpga-flash-16m.dtsi"
+
+/ {
+	compatible = "cdns,xtensa-ml605";
+	memory@0 {
+		device_type = "memory";
+		reg = <0x00000000 0x08000000>;
+	};
+};
diff --git a/kernel/arch/xtensa/boot/dts/xtfpga-flash-128m.dtsi b/kernel/arch/xtensa/boot/dts/xtfpga-flash-128m.dtsi
new file mode 100644
index 000000000..d3a88e029
--- /dev/null
+++ b/kernel/arch/xtensa/boot/dts/xtfpga-flash-128m.dtsi
@@ -0,0 +1,28 @@
+/ {
+	soc {
+		flash: flash@00000000 {
+			#address-cells = <1>;
+			#size-cells = <1>;
+			compatible = "cfi-flash";
+			reg = <0x00000000 0x08000000>;
+			bank-width = <2>;
+			device-width = <2>;
+			partition@0x0 {
+				label = "data";
+				reg = <0x00000000 0x06000000>;
+			};
+			partition@0x6000000 {
+				label = "boot loader area";
+				reg = <0x06000000 0x00800000>;
+			};
+			partition@0x6800000 {
+				label = "kernel image";
+				reg = <0x06800000 0x017e0000>;
+			};
+			partition@0x7fe0000 {
+				label = "boot environment";
+				reg = <0x07fe0000 0x00020000>;
+			};
+		};
+        };
+};
diff --git a/kernel/arch/xtensa/boot/dts/xtfpga-flash-16m.dtsi b/kernel/arch/xtensa/boot/dts/xtfpga-flash-16m.dtsi
new file mode 100644
index 000000000..1d97203c1
--- /dev/null
+++ b/kernel/arch/xtensa/boot/dts/xtfpga-flash-16m.dtsi
@@ -0,0 +1,28 @@
+/ {
+	soc {
+		flash: flash@08000000 {
+			#address-cells = <1>;
+			#size-cells = <1>;
+			compatible = "cfi-flash";
+			reg = <0x08000000 0x01000000>;
+			bank-width = <2>;
+			device-width = <2>;
+			partition@0x0 {
+				label = "boot loader area";
+				reg = <0x00000000 0x00400000>;
+			};
+			partition@0x400000 {
+				label = "kernel image";
+				reg = <0x00400000 0x00600000>;
+			};
+			partition@0xa00000 {
+				label = "data";
+				reg = <0x00a00000 0x005e0000>;
+			};
+			partition@0xfe0000 {
+				label = "boot environment";
+				reg = <0x00fe0000 0x00020000>;
+			};
+		};
+	};
+};
diff --git a/kernel/arch/xtensa/boot/dts/xtfpga-flash-4m.dtsi b/kernel/arch/xtensa/boot/dts/xtfpga-flash-4m.dtsi
new file mode 100644
index 000000000..d1c621ca8
--- /dev/null
+++ b/kernel/arch/xtensa/boot/dts/xtfpga-flash-4m.dtsi
@@ -0,0 +1,20 @@
+/ {
+	soc {
+		flash: flash@08000000 {
+			#address-cells = <1>;
+			#size-cells = <1>;
+			compatible = "cfi-flash";
+			reg = <0x08000000 0x00400000>;
+			bank-width = <2>;
+			device-width = <2>;
+			partition@0x0 {
+				label = "boot loader area";
+				reg = <0x00000000 0x003f0000>;
+			};
+			partition@0x3f0000 {
+				label = "boot environment";
+				reg = <0x003f0000 0x00010000>;
+			};
+		};
+	};
+};
diff --git a/kernel/arch/xtensa/boot/dts/xtfpga.dtsi b/kernel/arch/xtensa/boot/dts/xtfpga.dtsi
new file mode 100644
index 000000000..cd0b9e34a
--- /dev/null
+++ b/kernel/arch/xtensa/boot/dts/xtfpga.dtsi
@@ -0,0 +1,133 @@
+/ {
+	compatible = "cdns,xtensa-xtfpga";
+	#address-cells = <1>;
+	#size-cells = <1>;
+	interrupt-parent = <&pic>;
+
+	chosen {
+		bootargs = "earlycon=uart8250,mmio32,0xfd050020,115200n8 console=ttyS0,115200n8 ip=dhcp root=/dev/nfs rw debug";
+	};
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x00000000 0x06000000>;
+	};
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		cpu@0 {
+			compatible = "cdns,xtensa-cpu";
+			reg = <0>;
+			/* Filled in by platform_setup from FPGA register
+			 * clock-frequency = <100000000>;
+			 */
+		};
+	};
+
+	pic: pic {
+		compatible = "cdns,xtensa-pic";
+		/* one cell: internal irq number,
+		 * two cells: second cell == 0: internal irq number
+		 *            second cell == 1: external irq number
+		 */
+		#interrupt-cells = <2>;
+		interrupt-controller;
+	};
+
+	clocks {
+		osc: main-oscillator {
+			#clock-cells = <0>;
+			compatible = "fixed-clock";
+		};
+
+		clk54: clk54 {
+			#clock-cells = <0>;
+			compatible = "fixed-clock";
+			clock-frequency = <54000000>;
+		};
+	};
+
+	soc {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "simple-bus";
+		ranges = <0x00000000 0xf0000000 0x10000000>;
+
+		serial0: serial@0d050020 {
+			device_type = "serial";
+			compatible = "ns16550a";
+			no-loopback-test;
+			reg = <0x0d050020 0x20>;
+			reg-shift = <2>;
+			interrupts = <0 1>; /* external irq 0 */
+			clocks = <&osc>;
+		};
+
+		enet0: ethoc@0d030000 {
+			compatible = "opencores,ethoc";
+			reg = <0x0d030000 0x4000 0x0d800000 0x4000>;
+			interrupts = <1 1>; /* external irq 1 */
+			local-mac-address = [00 50 c2 13 6f 00];
+			clocks = <&osc>;
+		};
+
+		i2s0: xtfpga-i2s@0d080000 {
+			#sound-dai-cells = <0>;
+			compatible = "cdns,xtfpga-i2s";
+			reg = <0x0d080000 0x40>;
+			interrupts = <2 1>; /* external irq 2 */
+			clocks = <&cdce706 4>;
+		};
+
+		i2c0: i2c-master@0d090000 {
+			compatible = "opencores,i2c-ocores";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0x0d090000 0x20>;
+			reg-shift = <2>;
+			reg-io-width = <1>;
+			interrupts = <4 1>;
+			clocks = <&osc>;
+
+			cdce706: clock-synth@69 {
+				compatible = "ti,cdce706";
+				#clock-cells = <1>;
+				reg = <0x69>;
+				clocks = <&clk54>;
+				clock-names = "clk_in0";
+			};
+		};
+
+		spi0: spi-master@0d0a0000 {
+			compatible = "cdns,xtfpga-spi";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0x0d0a0000 0xc>;
+
+			tlv320aic23: sound-codec@0 {
+				#sound-dai-cells = <0>;
+				compatible = "tlv320aic23";
+				reg = <0>;
+				spi-max-frequency = <12500000>;
+			};
+		};
+	};
+
+	sound {
+		compatible = "simple-audio-card";
+		simple-audio-card,format = "i2s";
+		simple-audio-card,mclk-fs = <256>;
+
+		simple-audio-card,cpu {
+			sound-dai = <&i2s0>;
+		};
+
+		simple-audio-card,codec {
+			sound-dai = <&tlv320aic23>;
+			simple-audio-card,bitclock-master = <0>;
+			simple-audio-card,frame-master = <0>;
+			clocks = <&cdce706 4>;
+		};
+	};
+};
diff --git a/kernel/arch/xtensa/boot/lib/.gitignore b/kernel/arch/xtensa/boot/lib/.gitignore
new file mode 100644
index 000000000..1629a6167
--- /dev/null
+++ b/kernel/arch/xtensa/boot/lib/.gitignore
@@ -0,0 +1,3 @@
+inffast.c
+inflate.c
+inftrees.c
diff --git a/kernel/arch/xtensa/boot/lib/Makefile b/kernel/arch/xtensa/boot/lib/Makefile
new file mode 100644
index 000000000..6868f2ca6
--- /dev/null
+++ b/kernel/arch/xtensa/boot/lib/Makefile
@@ -0,0 +1,24 @@
+#
+# Makefile for some libs needed by zImage.
+#
+
+zlib	:= inffast.c inflate.c inftrees.c
+
+lib-y	+= $(zlib:.c=.o) zmem.o
+
+ccflags-y	:= -Ilib/zlib_inflate
+ifdef CONFIG_FUNCTION_TRACER
+CFLAGS_REMOVE_inflate.o = -pg
+CFLAGS_REMOVE_zmem.o = -pg
+CFLAGS_REMOVE_inftrees.o = -pg
+CFLAGS_REMOVE_inffast.o = -pg
+endif
+
+
+quiet_cmd_copy_zlib = COPY    $@
+      cmd_copy_zlib = cat $< > $@
+
+$(addprefix $(obj)/,$(zlib)): $(obj)/%: $(srctree)/lib/zlib_inflate/%
+	$(call cmd,copy_zlib)
+
+clean-files	:= $(zlib)
diff --git a/kernel/arch/xtensa/boot/lib/zmem.c b/kernel/arch/xtensa/boot/lib/zmem.c
new file mode 100644
index 000000000..d9862aa8c
--- /dev/null
+++ b/kernel/arch/xtensa/boot/lib/zmem.c
@@ -0,0 +1,79 @@
+#include <linux/zlib.h>
+
+/* bits taken from ppc */
+
+extern void *avail_ram, *end_avail;
+
+void exit (void)
+{
+  for (;;);
+}
+
+void *zalloc(unsigned size)
+{
+        void *p = avail_ram;
+
+        size = (size + 7) & -8;
+        avail_ram += size;
+        if (avail_ram > end_avail) {
+                //puts("oops... out of memory\n");
+                //pause();
+                exit ();
+        }
+        return p;
+}
+
+#define HEAD_CRC        2
+#define EXTRA_FIELD     4
+#define ORIG_NAME       8
+#define COMMENT         0x10
+#define RESERVED        0xe0
+
+#define DEFLATED        8
+
+void gunzip (void *dst, int dstlen, unsigned char *src, int *lenp)
+{
+	z_stream s;
+	int r, i, flags;
+
+        /* skip header */
+        i = 10;
+        flags = src[3];
+        if (src[2] != DEFLATED || (flags & RESERVED) != 0) {
+                //puts("bad gzipped data\n");
+                exit();
+        }
+        if ((flags & EXTRA_FIELD) != 0)
+                i = 12 + src[10] + (src[11] << 8);
+        if ((flags & ORIG_NAME) != 0)
+                while (src[i++] != 0)
+                        ;
+        if ((flags & COMMENT) != 0)
+                while (src[i++] != 0)
+                        ;
+        if ((flags & HEAD_CRC) != 0)
+                i += 2;
+        if (i >= *lenp) {
+                //puts("gunzip: ran out of data in header\n");
+                exit();
+        }
+
+	s.workspace = zalloc(zlib_inflate_workspacesize());
+        r = zlib_inflateInit2(&s, -MAX_WBITS);
+        if (r != Z_OK) {
+                //puts("inflateInit2 returned "); puthex(r); puts("\n");
+                exit();
+        }
+        s.next_in = src + i;
+        s.avail_in = *lenp - i;
+        s.next_out = dst;
+        s.avail_out = dstlen;
+        r = zlib_inflate(&s, Z_FINISH);
+        if (r != Z_OK && r != Z_STREAM_END) {
+                //puts("inflate returned "); puthex(r); puts("\n");
+                exit();
+        }
+        *lenp = s.next_out - (unsigned char *) dst;
+        zlib_inflateEnd(&s);
+}
+