target/; xtensa support

Part of #163.

Signed-off-by: Maxim Grigoriev <maxim2405@gmail.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

15 files changed, 1283 insertions, 0 deletions

diff --git a/target/Config.in.arch b/target/Config.in.arch
index 611210e87..e63fc027a 100644
--- a/target/Config.in.arch
+++ b/target/Config.in.arch
@@ -43,6 +43,8 @@ config BR2_sparc64
 	bool "sparc64"
 config BR2_x86_64
 	bool "x86_64"
+config BR2_xtensa
+	bool "xtensa"
 endchoice
 
 #
@@ -396,6 +398,38 @@ endchoice
 
 choice
 	prompt "Target Architecture Variant"
+	depends on BR2_xtensa
+	default BR2_xtensa_dc232b
+	help
+	  Specific CPU variant to use
+
+config BR2_xtensa_custom
+	bool "Custom Xtensa processor configuration"
+config BR2_xtensa_dc232a
+	bool "dc232a - Diamond 232L Standard Core Rev.A (LE)"
+config BR2_xtensa_dc232b
+	bool "dc232b - Diamond 232L Standard Core Rev.B (LE)"
+#config BR2_xtensa_s5000
+#	bool "s5000 - Stretch S5000"
+endchoice
+
+config BR2_xtensa_custom_name
+	string "Custom Xtensa processor configuration name"
+	depends on BR2_xtensa_custom
+	default ""
+	help
+	  Name given to a custom Xtensa processor configuration.
+	  This is used to select the correct overlay.
+
+config BR2_xtensa_core_name
+	string
+	default BR2_xtensa_custom_name	if BR2_xtensa_custom
+	default "dc232a"		if BR2_xtensa_dc232a
+	default "dc232b"		if BR2_xtensa_dc232b
+#	default "s5000"			if BR2_xtensa_s5000
+
+choice
+	prompt "Target Architecture Variant"
 	depends on BR2_powerpc
 	default BR2_generic_powerpc
 	help
@@ -496,6 +530,7 @@ config BR2_ARCH
 	default "x86_64"	if BR2_x86_64_opteron
 	default "x86_64"	if BR2_x86_64_opteron_sse3
 	default "x86_64"	if BR2_x86_64_barcelona
+	default "xtensa"	if BR2_xtensa
 
 
 config BR2_ENDIAN
diff --git a/target/Makefile.in b/target/Makefile.in
index b1450413e..ff0f6b523 100644
--- a/target/Makefile.in
+++ b/target/Makefile.in
@@ -62,6 +62,7 @@ include target/generic/Makefile.in
 include target/device/Makefile.in
 include target/x86/Makefile.in
 include target/powerpc/Makefile.in
+include target/xtensa/Makefile.in
 
 ifeq ($(BR2_TARGET_UBOOT),y)
 include target/u-boot/Makefile.in
diff --git a/target/device/Config.in b/target/device/Config.in
index 50d011fe8..ca569709b 100644
--- a/target/device/Config.in
+++ b/target/device/Config.in
@@ -10,6 +10,7 @@ source "target/device/Atmel/Config.in"
 source "target/device/KwikByte/Config.in"
 source "target/device/valka/Config.in"
 source "target/device/x86/Config.in"
+source "target/device/xtensa/Config.in"
 
 # This must be last
 source "target/generic/Config.in"
diff --git a/target/device/xtensa/Config.in b/target/device/xtensa/Config.in
new file mode 100644
index 000000000..0d4408c23
--- /dev/null
+++ b/target/device/xtensa/Config.in
@@ -0,0 +1,21 @@
+menuconfig	BR2_TARGET_XTENSA
+	bool "Device and Board Support for Xtensa and Diamond cores"
+	depends on BR2_xtensa
+	default y
+	help
+	  Lists development boards with support for the Xtensa architecture.
+
+if BR2_TARGET_XTENSA
+comment "Tensilica Xtensa/Diamond based Device Support"
+	depends on BR2_xtensa
+
+config BR2_TARGET_XTENSA_XTAV60
+	bool "XTAV60/200 board (Avnet LX60 or LX200 plus Tensilica IP)"
+	depends on BR2_xtensa
+	default y
+	help
+	  The XTAV60 or XTAV200 board, which is an Avnet LX60 or LX200
+	  emulation board programmed with an FPGA bitstream obtained
+	  from Tensilica.
+
+endif
diff --git a/target/device/xtensa/Makefile.in b/target/device/xtensa/Makefile.in
new file mode 100644
index 000000000..f3248962f
--- /dev/null
+++ b/target/device/xtensa/Makefile.in
@@ -0,0 +1,14 @@
+ifeq ($(strip $(BR2_TARGET_XTENSA_XTAV60)),y)
+# UCLIBC_CONFIG_FILE:=target/device/xtensa/xtav60/uClibc.config
+# BR2_PACKAGE_BUSYBOX_CONFIG:=target/device/xtensa/xtav60/busybox.config
+TARGET_SKELETON_PATCH:=target/device/xtensa
+endif
+
+#  Custom device table patch used when targeting ISS:
+OLD_TARGET_DEVICE_TABLE := $(TARGET_DEVICE_TABLE)
+TARGET_DEVICE_TABLE := target/device/xtensa/device_table.txt
+makedevs:
+	@echo "Applying patch to $(TARGET_DEVICE_TABLE)"
+	cp -f $(OLD_TARGET_DEVICE_TABLE) $(TARGET_DEVICE_TABLE)
+	patch -p1 -g 0 < target/device/xtensa/device_table.diff
+
diff --git a/target/device/xtensa/device_table.diff b/target/device/xtensa/device_table.diff
new file mode 100644
index 000000000..12f682546
--- /dev/null
+++ b/target/device/xtensa/device_table.diff
@@ -0,0 +1,10 @@
+diff --git a/target/generic/device_table.txt b/target/generic/device_table.txt
+index f4b16ba..b87bf69 100644
+--- a/target/device/xtensa/device_table.txt
++++ b/target/device/xtensa/device_table.txt
+@@ -169,3 +169,5 @@
+ #/dev/mcd      b       640     0       0       23      0       0       0       
+ #/dev/optcd    b       640     0       0       17      0       0       0       
+ 
++/dev/simdisk0        b      640      0       0       240     0       0       0
++/dev/simdisk1        b      640      0       0       240     1       0       0
diff --git a/target/device/xtensa/skeleton-patch/etc/inittab b/target/device/xtensa/skeleton-patch/etc/inittab
new file mode 100644
index 000000000..b336ff69c
--- /dev/null
+++ b/target/device/xtensa/skeleton-patch/etc/inittab
@@ -0,0 +1,47 @@
+# /etc/inittab
+#
+# Copyright (C) 2001 Erik Andersen <andersen@codepoet.org>
+#
+# Note: BusyBox init doesn't support runlevels.  The runlevels field is
+# completely ignored by BusyBox init. If you want runlevels, use
+# sysvinit.
+#
+# Format for each entry: <id>:<runlevels>:<action>:<process>
+#
+# id        == tty to run on, or empty for /dev/console
+# runlevels == ignored
+# action    == one of sysinit, respawn, askfirst, wait, and once
+# process   == program to run
+
+# Startup the system
+null::sysinit:/bin/mount -t proc proc /proc
+null::sysinit:/bin/mount -o remount,rw /
+null::sysinit:/bin/mount -a
+null::sysinit:/bin/hostname -F /etc/hostname
+null::sysinit:/sbin/ifconfig lo 127.0.0.1 up
+null::sysinit:/sbin/route add -net 127.0.0.0 netmask 255.0.0.0 lo
+# now run any rc scripts
+::sysinit:/etc/init.d/rcS
+
+# Set up a couple of getty's
+#tty1::respawn:/sbin/getty 38400 tty1
+#tty2::respawn:/sbin/getty 38400 tty2
+
+# Put a getty on the serial port
+ttyS0::respawn:/sbin/getty -L ttyS0 38400 vt100
+
+# Logging junk
+null::sysinit:/bin/touch /var/log/messages
+null::respawn:/sbin/syslogd -n -m 0
+null::respawn:/sbin/klogd -n
+#tty3::respawn:/usr/bin/tail -f /var/log/messages
+
+# Stuff to do for the 3-finger salute
+::ctrlaltdel:/sbin/reboot
+
+# Stuff to do before rebooting
+null::shutdown:/usr/bin/killall klogd
+null::shutdown:/usr/bin/killall syslogd
+null::shutdown:/bin/umount -a -r
+null::shutdown:/sbin/swapoff -a
+
diff --git a/target/xtensa/.gitignore b/target/xtensa/.gitignore
new file mode 100644
index 000000000..cff61bf9e
--- /dev/null
+++ b/target/xtensa/.gitignore
@@ -0,0 +1 @@
+/busybox-config
diff --git a/target/xtensa/Makefile.in b/target/xtensa/Makefile.in
new file mode 100644
index 000000000..8a654b998
--- /dev/null
+++ b/target/xtensa/Makefile.in
@@ -0,0 +1 @@
+-include target/xtensa/*/*.mk
diff --git a/target/xtensa/defconfig b/target/xtensa/defconfig
new file mode 100644
index 000000000..4127f5308
--- /dev/null
+++ b/target/xtensa/defconfig
@@ -0,0 +1,133 @@
+# Default buildroot configuration for running Linux on an Xtensa processor
+# on an LX60 board.
+
+#
+# Project Options
+#
+BR2_BANNER="Welcome to your custom Xtensa processor based uClibc environment."
+BR2_HAVE_DOT_CONFIG=y
+BR2_xtensa=y
+BR2_xtensa_dc232b=y
+BR2_xtensa_core_name="dc232b"
+BR2_ARCH="xtensa"
+
+#
+# Build options
+#
+BR2_WGET="wget --passive-ftp"
+# BR2_STRIP_strip is not set
+# BR2_STRIP_none=y
+
+## Added by Maxim
+BR2_UPDATE_CONFIG=y
+
+#
+# Kernel Header Options
+#
+BR2_KERNEL_none=y
+BR2_KERNEL_HEADERS_2_6_22_1=y
+BR2_DEFAULT_KERNEL_HEADERS="2.6.22.1"
+
+#
+# uClibc Options
+#
+BR2_UCLIBC_VERSION_0_9_30=y
+# BR2_UCLIBC_VERSION_SNAPSHOT is not set
+BR2_UCLIBC_CONFIG="target/xtensa/uClibc-0.9.30.config"
+BR2_PTHREADS_OLD=y
+# BR2_PTHREADS_NATIVE is not set
+BR2_PTHREAD_DEBUG=y
+
+#
+# Binutils Options
+#
+BR2_BINUTILS_VERSION_2_19=y
+BR2_BINUTILS_VERSION="2.19"
+BR2_EXTRA_BINUTILS_CONFIG_OPTIONS=""
+
+#
+# Gcc Options
+#
+BR2_GCC_VERSION_4_3_2=y
+# BR2_GCC_IS_SNAP is not set
+BR2_GCC_VERSION="4.3.2"
+BR2_TOOLCHAIN_SYSROOT=y
+BR2_EXTRA_GCC_CONFIG_OPTIONS=""
+BR2_GCC_CROSS_CXX=y
+BR2_INSTALL_LIBSTDCPP=y
+BR2_GCC_SHARED_LIBGCC=y
+
+#
+# Gdb Options
+#
+BR2_PACKAGE_GDB=y
+BR2_PACKAGE_GDB_SERVER=y
+BR2_PACKAGE_GDB_HOST=y
+# BR2_GDB_VERSION_6_2_1 is not set
+# BR2_GDB_VERSION_6_3 is not set
+# BR2_GDB_VERSION_6_4 is not set
+# BR2_GDB_VERSION_6_5 is not set
+# BR2_GDB_VERSION_6_6 is not set
+# BR2_GDB_VERSION_6_7_1 is not set
+BR2_GDB_VERSION_6_8=y
+# BR2_GDB_VERSION_SNAPSHOT is not set
+BR2_GDB_VERSION="6.8"
+
+#
+# Common Toolchain Options
+#
+# BR2_PACKAGE_SSTRIP_TARGET is not set
+# BR2_PACKAGE_SSTRIP_HOST is not set
+# BR2_ENABLE_MULTILIB is not set
+BR2_LARGEFILE=y
+BR2_INET_RPC=y
+BR2_TARGET_OPTIMIZATION="-Os -pipe"
+BR2_CROSS_TOOLCHAIN_TARGET_UTILS=y
+
+
+## These two added by Maxim
+BR2_TOOLCHAIN_BUILDROOT=y
+BR2_TOOLCHAIN_SOURCE=y
+
+
+BR2_PACKAGE_BUSYBOX_HIDE_OTHERS=y
+
+#
+# Other development stuff
+#
+BR2_HOST_FAKEROOT=y
+# BR2_PACKAGE_LIBINTL is not set
+#  For NFS mount:
+BR2_PACKAGE_PORTMAP=y
+
+#
+# Other stuff
+#
+
+#
+# filesystem for target device
+#
+BR2_TARGET_ROOTFS_CPIO=y
+BR2_TARGET_ROOTFS_CPIO_GZIP=y
+BR2_TARGET_ROOTFS_INITRAMFS=y
+
+#
+# Linux Options
+#
+# BR2_PACKAGE_LINUX is not set
+
+#
+# Board Support Options
+#
+BR2_TARGET_XTENSA=y
+
+#
+# Tensilica Xtensa/Diamond based Device Support
+#
+BR2_TARGET_XTENSA_XTAV60=y
+
+#
+# Compressors / decompressors
+#
+
+BR2_PACKAGE_ZLIB=y
diff --git a/target/xtensa/patch.in b/target/xtensa/patch.in
new file mode 100644
index 000000000..5b723a8b4
--- /dev/null
+++ b/target/xtensa/patch.in
@@ -0,0 +1,33 @@
+ifneq ($(filter xtensa%,$(ARCH)),)
+#############################################################
+#
+#  Xtensa processor architecture (including Diamond Standard cores)
+#
+#############################################################
+
+#  The following defines a function to be used like this:
+#	$(call XTENSA_PATCH, <module>, <patchdir>, <relative dir list...>)
+#  which returns the first overlay patch file for <module> found
+#  in the list of directories <relative dir list...> which are
+#  relative to <patchdir> (itself either absolute or relative to the
+#  current directory).  The returned filename is relative to <patchdir>.
+#  For example:
+#	$(call XTENSA_PATCH, binutils, some/dir/path, . ..)
+#  (no commas between directory paths in the list).
+#
+#  A selected overlay patch must exist ("fsf" means no specific
+#  overlay is selected).  So the function emits a Makefile error
+#  if a selected patch file is not found.
+
+XTENSA_CORENAME:=$(strip $(subst ",,$(BR2_xtensa_core_name)))
+ifeq ($(XTENSA_CORENAME),fsf)
+XTENSA_PATCH =
+else
+XTENSA_PATCH_SUFFIX = $(1)-xtensa_$(XTENSA_CORENAME).tgz
+XTENSA_PATCH_FILE = $(firstword $(wildcard $(patsubst %,$(2)/%/*$(XTENSA_PATCH_SUFFIX),$(3))))
+# FULLPATH = $(if $(filter /%,$(1)),$(1),$(PWD)/$(1))
+XTENSA_PATCH = $(if $(XTENSA_PATCH_FILE),$(patsubst $(2)/%,%,$(XTENSA_PATCH_FILE)),\
+	$(error Missing $(1) patch for Xtensa $(XTENSA_CORENAME) processor (*$(XTENSA_PATCH_SUFFIX) in $(addprefix $(2)/,$(3)))))
+endif
+
+endif
diff --git a/target/xtensa/setup-config b/target/xtensa/setup-config
new file mode 100644
index 000000000..7ef8fe86e
--- /dev/null
+++ b/target/xtensa/setup-config
@@ -0,0 +1,57 @@
+#!/bin/sh
+
+#  Convenience script for setting up a default buildroot config
+#  for Xtensa processor targets..
+
+usage() {
+    echo "Usage (invoke from top of buildroot tree):"
+    echo "    ./target/xtensa/setup-config <corename>"
+   #echo "    ./target/xtensa/setup-config <corename> [<overlaypath>]"
+    echo "where:"
+    echo "    <corename> is the Xtensa core overlay name, as specified in the -c option"
+    echo "    of the ./target/xtensa/xt-buildroot-overlay-install script."
+    echo ""
+    echo "For example:"
+    echo "   ./target/xtensa/setup-config dc232b"
+    echo ""
+    echo "Currently installed (available) core overlay names are:"
+    echo "   " `ls toolchain/binutils/binutils-xtensa_*.tgz | sed -e 's,toolchain\/binutils\/binutils-xtensa_\(.*\)\.tgz,\1,g'`
+    exit 1
+}
+
+if [ $# -ne 1 ]; then
+    usage
+fi
+
+core=$1 ; shift
+
+if [ ! -f toolchain/binutils/binutils-xtensa_${core}.tgz \
+  -o ! -f toolchain/gcc/gcc-xtensa_${core}.tgz \
+  -o ! -f toolchain/gdb/gdb-xtensa_${core}.tgz ]; then
+    echo "ERROR: Did not find an installed Xtensa core overlay named '${core}'."
+    echo "ERROR: Please install it first with ./target/xtensa/xt-buildroot-overlay-install"
+    echo ""
+    usage
+fi
+
+#  Use preset buildroot config:
+cp target/xtensa/defconfig .defconfig-xtensa
+#  Set core name:
+sed -i -e 's,^BR2_xtensa_\(.*\)=y,BR2_xtensa_custom=y\nBR2_xtensa_custom_name="'${core}'",' .defconfig-xtensa
+##  sed -i -e 's,^.*BR2_xtensa_core_name.*,BR_xtensa_core_name="'${core}'",'  .defconfig-xtensa
+#  Create full .config with defaults:
+make clean defconfig CONFIG_DEFCONFIG=.defconfig-xtensa || exit 1
+
+#  Busybox adjustments:  turn off 'ar' (can't create archives yet overrides real one)
+#  and turn on NFS mounting (Xtensa defconfig turns on RPC so this can work):
+#
+bborig=`grep '^BR2_PACKAGE_BUSYBOX_CONFIG=' .config | sed -e 's,.*"\(.*\)".*,\1,'`
+bbconf=target/xtensa/busybox-config
+cp $bborig $bbconf
+sed -i -e 's,^CONFIG_AR=y,# CONFIG_AR is not set,' $bbconf
+sed -i -e 's,^.*CONFIG_FEATURE_MOUNT_NFS.*,CONFIG_FEATURE_MOUNT_NFS=y,' $bbconf
+#  Make use of above busybox adjustments:
+sed -i -e 's,.*\(BR2_PACKAGE_BUSYBOX_CONFIG\).*,\1="'$bbconf'",' .config
+
+echo "Done."
+
diff --git a/target/xtensa/uClibc-0.9.30.config b/target/xtensa/uClibc-0.9.30.config
new file mode 100644
index 000000000..cc6815d07
--- /dev/null
+++ b/target/xtensa/uClibc-0.9.30.config
@@ -0,0 +1,245 @@
+#
+# Automatically generated make config: don't edit
+# Thu Jan 23 14:50:00 2009
+#
+# TARGET_alpha is not set
+# TARGET_arm is not set
+# TARGET_avr32 is not set
+# TARGET_bfin is not set
+# TARGET_cris is not set
+# TARGET_e1 is not set
+# TARGET_frv is not set
+# TARGET_h8300 is not set
+# TARGET_hppa is not set
+# TARGET_i386 is not set
+# TARGET_i960 is not set
+# TARGET_ia64 is not set
+# TARGET_m68k is not set
+# TARGET_microblaze is not set
+# TARGET_mips is not set
+# TARGET_nios is not set
+# TARGET_nios2 is not set
+# TARGET_powerpc is not set
+# TARGET_sh is not set
+# TARGET_sh64 is not set
+# TARGET_sparc is not set
+# TARGET_v850 is not set
+# TARGET_vax is not set
+# TARGET_x86_64 is not set
+TARGET_xtensa=y
+
+#
+# Target Architecture Features and Options
+#
+TARGET_ARCH="xtensa"
+FORCE_OPTIONS_FOR_ARCH=y
+# ARCH_LITTLE_ENDIAN is not set
+# ARCH_BIG_ENDIAN is not set
+# ARCH_WANTS_LITTLE_ENDIAN is not set
+# ARCH_WANTS_BIG_ENDIAN is not set
+
+#
+# Using ELF file format
+#
+ARCH_HAS_MMU=y
+ARCH_USE_MMU=y
+UCLIBC_HAS_FLOATS=y
+UCLIBC_HAS_FPU=y
+DO_C99_MATH=y
+# UCLIBC_HAS_FENV is not set
+UCLIBC_HAS_LONG_DOUBLE_MATH=y
+KERNEL_HEADERS="/usr/src/linux/include"
+HAVE_DOT_CONFIG=y
+
+#
+# General Library Settings
+#
+# HAVE_NO_PIC is not set
+DOPIC=y
+# ARCH_HAS_NO_SHARED is not set
+# ARCH_HAS_NO_LDSO is not set
+HAVE_SHARED=y
+# FORCE_SHAREABLE_TEXT_SEGMENTS is not set
+LDSO_LDD_SUPPORT=y
+LDSO_CACHE_SUPPORT=y
+# LDSO_PRELOAD_FILE_SUPPORT is not set
+LDSO_BASE_FILENAME="ld.so"
+# UCLIBC_STATIC_LDCONFIG is not set
+# LDSO_RUNPATH is not set
+UCLIBC_CTOR_DTOR=y
+# LDSO_GNU_HASH_SUPPORT is not set
+# HAS_NO_THREADS is not set
+UCLIBC_HAS_THREADS=y
+PTHREADS_DEBUG_SUPPORT=y
+LINUXTHREADS_OLD=y
+UCLIBC_HAS_SYSLOG=y
+UCLIBC_HAS_LFS=y
+# MALLOC is not set
+# MALLOC_SIMPLE is not set
+MALLOC_STANDARD=y
+MALLOC_GLIBC_COMPAT=y
+UCLIBC_DYNAMIC_ATEXIT=y
+# COMPAT_ATEXIT is not set
+UCLIBC_SUSV3_LEGACY=y
+UCLIBC_SUSV3_LEGACY_MACROS=y
+# UCLIBC_HAS_STUBS is not set
+UCLIBC_HAS_SHADOW=y
+# UCLIBC_HAS_PROGRAM_INVOCATION_NAME is not set
+UCLIBC_HAS___PROGNAME=y
+UCLIBC_HAS_PTY=y
+UNIX98PTY_ONLY=y
+# UCLIBC_HAS_GETPT is not set
+ASSUME_DEVPTS=y
+UCLIBC_HAS_TM_EXTENSIONS=y
+UCLIBC_HAS_TZ_CACHING=y
+UCLIBC_HAS_TZ_FILE=y
+UCLIBC_HAS_TZ_FILE_READ_MANY=y
+UCLIBC_TZ_FILE_PATH="/etc/TZ"
+
+#
+# Advanced Library Settings
+#
+UCLIBC_PWD_BUFFER_SIZE=256
+UCLIBC_GRP_BUFFER_SIZE=256
+UCLIBC_HAS_NONREENTRANT=y
+
+#
+# Networking Support
+#
+
+UCLIBC_LINUX_MODULE_24=y
+UCLIBC_LINUX_SPECIFIC=y
+UCLIBC_HAS_GNU_ERROR=y
+UCLIBC_BSD_SPECIFIC=y
+UCLIBC_HAS_BSD_ERR=y
+UCLIBC_HAS_OBSOLETE_BSD_SIGNAL=y
+UCLIBC_HAS_OBSOLETE_SYSV_SIGNAL=y
+# UCLIBC_NTP_LEGACY is not set
+# UCLIBC_SV4_DEPRECATED is not set
+UCLIBC_HAS_REALTIME=y
+UCLIBC_HAS_ADVANCED_REALTIME=y
+UCLIBC_HAS_EPOLL=y
+UCLIBC_HAS_XATTR=y
+UCLIBC_HAS_PROFILING=y
+UCLIBC_HAS_CRYPT_IMPL=y
+UCLIBC_HAS_CRYPT=y
+UCLIBC_HAS_NETWORK_SUPPORT=y
+UCLIBC_HAS_SOCKET=y
+UCLIBC_HAS_IPV4=y
+UCLIBC_HAS_IPV6=y
+UCLIBC_HAS_RPC=y
+UCLIBC_HAS_FULL_RPC=y
+UCLIBC_HAS_REENTRANT_RPC=y
+UCLIBC_USE_NETLINK=y
+# UCLIBC_SUPPORT_AI_ADDRCONFIG is not set
+# UCLIBC_HAS_BSD_RES_CLOSE is not set
+
+
+#
+# String and Stdio Support
+#
+# UCLIBC_HAS_STRING_GENERIC_OPT is not set
+# UCLIBC_HAS_STRING_ARCH_OPT is not set
+UCLIBC_HAS_CTYPE_TABLES=y
+UCLIBC_HAS_CTYPE_SIGNED=y
+# UCLIBC_HAS_CTYPE_UNSAFE is not set
+# UCLIBC_HAS_CTYPE_CHECKED is not set
+# UCLIBC_HAS_CTYPE_ENFORCED is not set
+# UCLIBC_HAS_WCHAR is not set
+# UCLIBC_HAS_LOCALE is not set
+UCLIBC_HAS_HEXADECIMAL_FLOATS=y
+UCLIBC_HAS_GLIBC_CUSTOM_PRINTF=y
+# USE_OLD_VFPRINTF is not set
+UCLIBC_PRINTF_SCANF_POSITIONAL_ARGS=9
+UCLIBC_HAS_SCANF_GLIBC_A_FLAG=y
+# UCLIBC_HAS_STDIO_BUFSIZ_NONE is not set
+# UCLIBC_HAS_STDIO_BUFSIZ_256 is not set
+# UCLIBC_HAS_STDIO_BUFSIZ_512 is not set
+# UCLIBC_HAS_STDIO_BUFSIZ_1024 is not set
+# UCLIBC_HAS_STDIO_BUFSIZ_2048 is not set
+UCLIBC_HAS_STDIO_BUFSIZ_4096=y
+# UCLIBC_HAS_STDIO_BUFSIZ_8192 is not set
+UCLIBC_HAS_STDIO_BUILTIN_BUFFER_NONE=y
+# UCLIBC_HAS_STDIO_BUILTIN_BUFFER_4 is not set
+# UCLIBC_HAS_STDIO_BUILTIN_BUFFER_8 is not set
+# UCLIBC_HAS_STDIO_SHUTDOWN_ON_ABORT is not set
+# UCLIBC_HAS_STDIO_GETC_MACRO is not set
+# UCLIBC_HAS_STDIO_PUTC_MACRO is not set
+UCLIBC_HAS_STDIO_AUTO_RW_TRANSITION=y
+# UCLIBC_HAS_FOPEN_LARGEFILE_MODE is not set
+UCLIBC_HAS_FOPEN_EXCLUSIVE_MODE=y
+UCLIBC_HAS_GLIBC_CUSTOM_STREAMS=y
+UCLIBC_HAS_PRINTF_M_SPEC=y
+UCLIBC_HAS_ERRNO_MESSAGES=y
+# UCLIBC_HAS_SYS_ERRLIST is not set
+UCLIBC_HAS_SIGNUM_MESSAGES=y
+# UCLIBC_HAS_SYS_SIGLIST is not set
+UCLIBC_HAS_GNU_GETOPT=y
+# UCLIBC_HAS_GNU_GETSUBOPT is not set
+
+#
+# Big and Tall
+#
+UCLIBC_HAS_REGEX=y
+# UCLIBC_HAS_REGEX_OLD is not set
+UCLIBC_HAS_FNMATCH=y
+# UCLIBC_HAS_FNMATCH_OLD is not set
+# UCLIBC_HAS_WORDEXP is not set
+UCLIBC_HAS_FTW=y
+UCLIBC_HAS_GLOB=y
+UCLIBC_HAS_GNU_GLOB=y
+
+#
+# Library Installation Options
+#
+SHARED_LIB_LOADER_PREFIX="/lib"
+RUNTIME_PREFIX="/"
+DEVEL_PREFIX="/usr/"
+
+#
+# Security options
+#
+# UCLIBC_BUILD_PIE is not set
+UCLIBC_HAS_ARC4RANDOM=y
+# HAVE_NO_SSP is not set
+# UCLIBC_HAS_SSP is not set
+UCLIBC_BUILD_RELRO=y
+UCLIBC_BUILD_NOW=y
+# UCLIBC_BUILD_NOEXECSTACK is not set
+
+#
+# uClibc development/debugging options
+#
+CROSS_COMPILER_PREFIX=""
+UCLIBC_EXTRA_CFLAGS=""
+# DODEBUG is not set
+# DODEBUG_PT is not set
+DOSTRIP=y
+# DOASSERTS is not set
+# SUPPORT_LD_DEBUG is not set
+# SUPPORT_LD_DEBUG_EARLY is not set
+# UCLIBC_MALLOC_DEBUGGING is not set
+WARNINGS="-Wall"
+# EXTRA_WARNINGS is not set
+# DOMULTI is not set
+# UCLIBC_MJN3_ONLY is not set
+
+# USE_BX is not set
+# CONFIG_GENERIC_ARM is not set
+# CONFIG_ARM610 is not set
+# CONFIG_ARM710 is not set
+# CONFIG_ARM7TDMI is not set
+# CONFIG_ARM720T is not set
+# CONFIG_ARM920T is not set
+# CONFIG_ARM922T is not set
+# CONFIG_ARM926T is not set
+# CONFIG_ARM10T is not set
+# CONFIG_ARM1136JF_S is not set
+# CONFIG_ARM1176JZ_S is not set
+# CONFIG_ARM1176JZF_S is not set
+# CONFIG_ARM_CORTEX_M3 is not set
+# CONFIG_ARM_CORTEX_M1 is not set
+# CONFIG_ARM_SA110 is not set
+# CONFIG_ARM_SA1100 is not set
+# CONFIG_ARM_XSCALE is not set
+# CONFIG_ARM_IWMMXT is not set
diff --git a/target/xtensa/uClibc.config b/target/xtensa/uClibc.config
new file mode 100644
index 000000000..546a04534
--- /dev/null
+++ b/target/xtensa/uClibc.config
@@ -0,0 +1,190 @@
+#
+# Automatically generated make config: don't edit
+# Thu Jan 10 00:46:51 2008
+#
+# TARGET_alpha is not set
+# TARGET_arm is not set
+# TARGET_avr32 is not set
+# TARGET_bfin is not set
+# TARGET_cris is not set
+# TARGET_e1 is not set
+# TARGET_frv is not set
+# TARGET_h8300 is not set
+# TARGET_hppa is not set
+# TARGET_i386 is not set
+# TARGET_i960 is not set
+# TARGET_ia64 is not set
+# TARGET_m68k is not set
+# TARGET_microblaze is not set
+# TARGET_mips is not set
+# TARGET_nios is not set
+# TARGET_nios2 is not set
+# TARGET_powerpc is not set
+# TARGET_sh is not set
+# TARGET_sh64 is not set
+# TARGET_sparc is not set
+# TARGET_v850 is not set
+# TARGET_vax is not set
+# TARGET_x86_64 is not set
+TARGET_xtensa=y
+
+#
+# Target Architecture Features and Options
+#
+TARGET_ARCH="xtensa"
+TARGET_SUBARCH=""
+
+#
+# Using ELF file format
+#
+ARCH_HAS_MMU=y
+ARCH_USE_MMU=y
+UCLIBC_HAS_FLOATS=y
+UCLIBC_HAS_FPU=y
+DO_C99_MATH=y
+KERNEL_HEADERS="/usr/src/linux/include"
+HAVE_DOT_CONFIG=y
+
+#
+# General Library Settings
+#
+# HAVE_NO_PIC is not set
+DOPIC=y
+# HAVE_NO_SHARED is not set
+# ARCH_HAS_NO_LDSO is not set
+HAVE_SHARED=y
+# FORCE_SHAREABLE_TEXT_SEGMENTS is not set
+LDSO_LDD_SUPPORT=y
+LDSO_CACHE_SUPPORT=y
+# LDSO_PRELOAD_FILE_SUPPORT is not set
+LDSO_BASE_FILENAME="ld.so"
+# UCLIBC_STATIC_LDCONFIG is not set
+# LDSO_RUNPATH is not set
+UCLIBC_CTOR_DTOR=y
+# HAS_NO_THREADS is not set
+UCLIBC_HAS_THREADS=y
+PTHREADS_DEBUG_SUPPORT=y
+LINUXTHREADS_OLD=y
+UCLIBC_HAS_LFS=y
+# MALLOC is not set
+# MALLOC_SIMPLE is not set
+MALLOC_STANDARD=y
+MALLOC_GLIBC_COMPAT=y
+UCLIBC_DYNAMIC_ATEXIT=y
+# COMPAT_ATEXIT is not set
+# UCLIBC_SUSV3_LEGACY is not set
+UCLIBC_SUSV3_LEGACY_MACROS=y
+UCLIBC_HAS_SHADOW=y
+# UCLIBC_HAS_PROGRAM_INVOCATION_NAME is not set
+UCLIBC_HAS___PROGNAME=y
+# UNIX98PTY_ONLY is not set
+ASSUME_DEVPTS=y
+UCLIBC_HAS_TM_EXTENSIONS=y
+UCLIBC_HAS_TZ_CACHING=y
+UCLIBC_HAS_TZ_FILE=y
+UCLIBC_HAS_TZ_FILE_READ_MANY=y
+UCLIBC_TZ_FILE_PATH="/etc/TZ"
+
+#
+# Advanced Library Settings
+#
+UCLIBC_PWD_BUFFER_SIZE=256
+UCLIBC_GRP_BUFFER_SIZE=256
+
+#
+# Networking Support
+#
+UCLIBC_HAS_IPV6=y
+UCLIBC_HAS_RPC=y
+UCLIBC_HAS_FULL_RPC=y
+UCLIBC_HAS_REENTRANT_RPC=y
+# UCLIBC_USE_NETLINK is not set
+# UCLIBC_HAS_BSD_RES_CLOSE is not set
+
+#
+# String and Stdio Support
+#
+UCLIBC_HAS_STRING_GENERIC_OPT=y
+UCLIBC_HAS_STRING_ARCH_OPT=y
+UCLIBC_HAS_CTYPE_TABLES=y
+UCLIBC_HAS_CTYPE_SIGNED=y
+# UCLIBC_HAS_CTYPE_UNSAFE is not set
+UCLIBC_HAS_CTYPE_CHECKED=y
+# UCLIBC_HAS_CTYPE_ENFORCED is not set
+# UCLIBC_HAS_WCHAR is not set
+# UCLIBC_HAS_LOCALE is not set
+UCLIBC_HAS_HEXADECIMAL_FLOATS=y
+UCLIBC_HAS_GLIBC_CUSTOM_PRINTF=y
+# USE_OLD_VFPRINTF is not set
+UCLIBC_PRINTF_SCANF_POSITIONAL_ARGS=9
+UCLIBC_HAS_SCANF_GLIBC_A_FLAG=y
+# UCLIBC_HAS_STDIO_BUFSIZ_NONE is not set
+# UCLIBC_HAS_STDIO_BUFSIZ_256 is not set
+# UCLIBC_HAS_STDIO_BUFSIZ_512 is not set
+# UCLIBC_HAS_STDIO_BUFSIZ_1024 is not set
+# UCLIBC_HAS_STDIO_BUFSIZ_2048 is not set
+UCLIBC_HAS_STDIO_BUFSIZ_4096=y
+# UCLIBC_HAS_STDIO_BUFSIZ_8192 is not set
+UCLIBC_HAS_STDIO_BUILTIN_BUFFER_NONE=y
+# UCLIBC_HAS_STDIO_BUILTIN_BUFFER_4 is not set
+# UCLIBC_HAS_STDIO_BUILTIN_BUFFER_8 is not set
+# UCLIBC_HAS_STDIO_SHUTDOWN_ON_ABORT is not set
+UCLIBC_HAS_STDIO_GETC_MACRO=y
+UCLIBC_HAS_STDIO_PUTC_MACRO=y
+UCLIBC_HAS_STDIO_AUTO_RW_TRANSITION=y
+# UCLIBC_HAS_FOPEN_LARGEFILE_MODE is not set
+UCLIBC_HAS_FOPEN_EXCLUSIVE_MODE=y
+UCLIBC_HAS_GLIBC_CUSTOM_STREAMS=y
+UCLIBC_HAS_PRINTF_M_SPEC=y
+UCLIBC_HAS_ERRNO_MESSAGES=y
+# UCLIBC_HAS_SYS_ERRLIST is not set
+UCLIBC_HAS_SIGNUM_MESSAGES=y
+# UCLIBC_HAS_SYS_SIGLIST is not set
+UCLIBC_HAS_GNU_GETOPT=y
+UCLIBC_HAS_GNU_GETSUBOPT=y
+
+#
+# Big and Tall
+#
+UCLIBC_HAS_REGEX=y
+UCLIBC_HAS_REGEX_OLD=y
+UCLIBC_HAS_FNMATCH=y
+UCLIBC_HAS_FNMATCH_OLD=y
+# UCLIBC_HAS_WORDEXP is not set
+UCLIBC_HAS_FTW=y
+UCLIBC_HAS_GLOB=y
+UCLIBC_HAS_GNU_GLOB=y
+
+#
+# Library Installation Options
+#
+SHARED_LIB_LOADER_PREFIX="/lib"
+RUNTIME_PREFIX="/"
+DEVEL_PREFIX="/usr/"
+
+#
+# Security options
+#
+# UCLIBC_HAS_ARC4RANDOM is not set
+# HAVE_NO_SSP is not set
+# UCLIBC_HAS_SSP is not set
+UCLIBC_BUILD_RELRO=y
+UCLIBC_BUILD_NOW=y
+# UCLIBC_BUILD_NOEXECSTACK is not set
+
+#
+# uClibc development/debugging options
+#
+CROSS_COMPILER_PREFIX=""
+UCLIBC_EXTRA_CFLAGS=""
+# DODEBUG is not set
+# DOSTRIP is not set
+# DODEBUG_PT is not set
+# DOASSERTS is not set
+SUPPORT_LD_DEBUG=y
+# SUPPORT_LD_DEBUG_EARLY is not set
+# UCLIBC_MALLOC_DEBUGGING is not set
+WARNINGS="-Wall"
+EXTRA_WARNINGS=y
+# DOMULTI is not set
+# UCLIBC_MJN3_ONLY is not set
diff --git a/target/xtensa/xt-buildroot-overlay-install b/target/xtensa/xt-buildroot-overlay-install
new file mode 100644
index 000000000..254da1079
--- /dev/null
+++ b/target/xtensa/xt-buildroot-overlay-install
@@ -0,0 +1,494 @@
+#!/bin/sh
+#  Not every host installs perl at the same location, handle many locations:
+PATH=/usr/bin:/usr/local/bin:$PATH
+exec perl -x -S $0 ${1+"$@"}
+exit $?
+#!perl -w
+#line 8
+
+#  xt-buildroot-overlay-install [-t overlay_tarball] [-b buildroot_dir] \
+#				[-k kernel_dir] \
+#				[-c config_name] [-l long_name] [-f] [--help]
+#
+#  Creates individual overlay tarballs for gcc, binutils, gdb, and
+#  the Linux kernel, out of the Xtensa Configuration Overlay tarball from
+#  a Tensilica Core Package.  And installs these individual tarballs
+#  at the appropriate locations within a buildroot source tree.
+#
+#  The Xtensa configuration overlay tarball is located in:
+#	<xtensa_root>/src/xtensa-config-overlay.tar.gz
+#  where <xtensa_root> is the path to the Tensilica Core Package.
+#
+# Copyright (c) 2003-2008 by Tensilica Inc.  ALL RIGHTS RESERVED.
+# These coded instructions, statements, and computer programs are the
+# copyrighted works and confidential proprietary information of Tensilica Inc.
+# They may not be modified, copied, reproduced, distributed, or disclosed to
+# third parties in any manner, medium, or form, in whole or in part, without
+# the prior written consent of Tensilica Inc.
+#
+#  History:
+#  2007-NOV-08	1.0	meg	Initial version
+#  2007-NOV-21	1.1	meg	Add -k parameter
+#  2007-DEC-06	1.2	meg	Make -k and -b optional, check overlay sw vers.
+#  2008-FEB-27	1.3	meg	Accept Xtensa Tools RB-2008.3 overlays
+
+$progvers = "1.3";
+$progname = $0;
+$progname =~ s|.*[/\\:]||;
+
+
+######################################################################
+#
+#  Parse cmdline
+#
+
+my $overlay_tarball = undef;
+my $buildroot_dir = undef;
+my $kernel_dir = undef;
+my $config_name = undef;
+my $config_long_name = undef;
+my $force_clobber = 0;
+my $prompt = 1;		# undocumented option
+
+sub usage {
+    print "$progname version $progvers\n"
+    	 ."Usage:  $progname <parameters> [<options>]\n"
+	 ."Where <parameters> are:\n"
+	 ."  -t file.tgz     Specify path to the Xtensa Linux overlay tarball, typically\n"
+	 ."                  <xtensa_root>/src/xtensa-config-overlay.tar.gz\n"
+	 ."  -b dir          Path to the base of the buildroot source tree, in which\n"
+	 ."                  package specific overlay tarballs get installed.\n"
+	 ."  -k dir          Path to the base of the Linux kernel source tree, in which\n"
+	 ."                  the Linux kernel specific overlay gets installed.\n"
+	 ."  -c config_name  Name for the Xtensa processor configuration as it will be\n"
+	 ."                  known to the open source community.  Must be a lowercase\n"
+	 ."                  identifier, starting with a letter, consisting of letters\n"
+	 ."                  and numbers and underscores, not ending with underscore\n"
+	 ."                  and not containing consecutive underscores.  For examples:\n"
+	 ."                     dc232b , dc232b_be , mmubasele , fsf , s5000 .\n"
+	 ."  -l long_name    Long name for the Xtensa processor configuration, human-\n"
+	 ."                  readable with spaces etc allowed (must be quoted).\n"
+	 ."                  For example:  'Diamond 232L Standard Core Rev.B (LE)'\n"
+	 ."                  Try to keep it within approximately 40 characters.\n"
+	 ."And <options> are:\n"
+	 ."  -f              If package specific overlay tarballs already exist in\n"
+	 ."                  the destination source tree, overwrite them without asking.\n"
+	 ."  --help          Show this usage message.\n";
+}
+
+#  Get arguments:
+if (!@ARGV) {
+    usage();
+    exit 0;
+}
+while( defined($_ = shift) ) {
+    if( /^-[tbclk]$/ ) {		# option taking an argument
+	my $arg = shift;
+	if( !defined($arg) ) {
+	    print STDERR "$progname: ERROR: missing parameter after '$_' option\n\n";
+	    usage();
+	    exit 1;
+	}
+	$overlay_tarball = $arg if $_ eq "-t";
+	$buildroot_dir = $arg if $_ eq "-b";
+	$kernel_dir = $arg if $_ eq "-k";
+	$config_name = $arg if $_ eq "-c";
+	$config_long_name = $arg if $_ eq "-l";
+	next;
+    }
+    if( /^-f$/ ) {
+	$force_clobber = 1;
+	next;
+    }
+    if( /^--[m-t]{8}$/ && /[new]([wow])([pup])[fur]\1[maze]\2[tuff]/ ) {
+	$prompt = 0;
+	next;
+    }
+    if( /^-(h|help|\-h|\-help|\?)$/i ) {
+	usage();
+	exit 0;
+    }
+    print STDERR "$progname: ERROR: unrecognized option or argument '$_'\n\n";
+    usage();
+    exit 1;
+}
+
+
+######################################################################
+#
+#  Validate cmdline arguments
+#
+
+ErrorU("missing -c argument (core name)")
+	unless defined($config_name);
+#  Try to enforce reasonable names:
+ErrorU("-c: malformed core name '$config_name' (must be lowercase, letter followed by letters/digits, may contain underscore separators)")
+	unless $config_name =~ /^[a-z][a-z0-9]*(_[a-z0-9]+)*$/;
+ErrorU("-c: core name too short '$config_name'")
+	unless length($config_name) >= 2;
+ErrorU("-c: core name too long '$config_name'")
+	unless length($config_name) <= 16;
+
+
+ErrorU("missing -l argument (core long name)")
+	unless defined($config_long_name);
+$config_long_name =~ s/^\s+//;	# trim extra whitespace...
+$config_long_name =~ s/\s+$//;
+$config_long_name =~ s/\s+/ /g;
+#  Try to enforce reasonable names:
+ErrorU("-l: invalid (non-ASCII-printable) characters in core long name '$config_long_name'")
+	unless $config_long_name =~ /^[\x20-\x7E]+$/;
+ErrorU("-l: disallowed characters (\"\'\\) in core long name '$config_long_name'")
+	if $config_long_name =~ /[\'\"\\]/;
+ErrorU("-l: core long name too short '$config_long_name'")
+	unless length($config_long_name) >= 5;
+ErrorU("-l: core long name too long '$config_long_name'")
+	unless length($config_long_name) <= 60;
+
+
+#ErrorU("missing -b argument (buildroot source tree directory)")
+#	unless defined($buildroot_dir);
+if (defined($buildroot_dir)) {
+    ErrorU("-b: not a directory: $buildroot_dir")
+	    unless -d $buildroot_dir;
+    foreach my $p ("toolchain/gcc", "toolchain/binutils", "toolchain/gdb", "target/xtensa") {
+	ErrorU("-b: not a buildroot directory: missing $buildroot_dir/$p")
+	    unless -d $buildroot_dir . "/" . $p;
+    }
+}
+
+
+#ErrorU("missing -k argument (Linux kernel source tree directory)")
+#	unless defined($kernel_dir);
+if (defined($kernel_dir)) {
+    ErrorU("-k: not a directory: $kernel_dir")
+	    unless -d $kernel_dir;
+    foreach my $p ("kernel", "arch/xtensa/kernel", "include/asm-xtensa") {
+	ErrorU("-k: not a Linux kernel directory: missing $kernel_dir/$p")
+	    unless -d $kernel_dir . "/" . $p;
+    }
+}
+
+
+if (!defined($buildroot_dir) and !defined($kernel_dir)) {
+    print STDERR "$progname: WARNING:\n";
+    print STDERR "$progname: WARNING: Test run only, NOTHING WILL BE INSTALLED\n";
+    print STDERR "$progname: WARNING: (use -b and -k to specify install destination)\n";
+    print STDERR "$progname: WARNING:\n";
+}
+
+
+my @ovpaths = ( "/src/xtensa-config-overlay.tar.gz",
+		"/xtensa-elf/src/linux/misc/linux-overlay.tar.gz" );
+if (!defined($overlay_tarball)) {
+    #  Try to locate the overlay tarball based on XTENSA_SYSTEM and XTENSA_CORE
+    #  settings:
+    my $xtensa_root = `xt-xcc --show-config=config 2>/dev/null`;
+    $xtensa_root = "" unless defined($xtensa_root);
+    chomp($xtensa_root);
+    if ($xtensa_root ne "") {
+	($overlay_tarball) = grep(-f $xtensa_root.$_, @ovpaths);
+	if (!defined($overlay_tarball)) {
+	    ErrorU("Xtensa configuration overlay tarball not found: ".$xtensa_root.$ovpaths[0])
+	}
+    } else {
+	ErrorU("missing -t argument (Xtensa configuration overlay tarball filename)\n"
+	     ."and no default Xtensa Core Package defined in the environment");
+    }
+} else {
+    foreach my $p ("", @ovpaths) {
+	if (-f $overlay_tarball.$p) {
+	    $overlay_tarball .= $p;
+	    last;
+	}
+    }
+    ErrorU("-t: file not found: $overlay_tarball") unless -f $overlay_tarball;
+}
+
+
+######################################################################
+#
+#  Misc
+#
+
+my $overlay_unpacked = 0;
+my $ovdir;
+
+sub cleanup {
+    if ($overlay_unpacked) {
+	system("rm -rf '$ovdir' 2>/dev/null");
+    }
+}
+
+sub ErrorEmit {
+    my ($msg,$usage) = @_;
+    $msg =~ s|\n|"\n${progname}: ERROR: "|ge;
+    print STDERR "$progname: ERROR: $msg\n";
+    if ($usage) {
+	print "\n";
+	usage();
+    }
+    cleanup();
+    exit 1;
+}
+sub ErrorU { ErrorEmit(shift,1); }
+sub Error  { ErrorEmit(shift); }
+
+
+#  Read specified file (as binary), returning contents.
+#
+sub readfile {
+    my ($filename) = @_;
+    #  Read the file:
+    open(INFILE,"<$filename") or Error("error reading from '$filename': $!");
+    my $savesep = $/;
+    undef $/;
+    my $file = <INFILE>;
+    $/ = $savesep;
+    close(INFILE);
+    $file;
+}                                                                                                       
+
+#  Write specified file (as binary) with first argument (string).
+#
+sub writefile {
+    my ($filename, $file) = @_;
+    #  Read the file:
+    open(INFILE,">$filename") or Error("error writing to '$filename': $!");
+    print INFILE $file;
+    close(INFILE) or Error("error closing file '$filename': $!");
+}                                                                                                       
+
+
+######################################################################
+#
+#  Determine a temporary directory.
+#
+
+my $tmpdir = "/tmp";
+if (defined($ENV{"TMP"}) and -d $ENV{"TMP"}) {
+    $tmpdir = $ENV{"TMP"};
+} elsif (defined($ENV{"TEMP"}) and -d $ENV{"TEMP"}) {
+    $tmpdir = $ENV{"TEMP"};
+}
+
+
+######################################################################
+#
+#  Unpack the general overlay tarball
+#
+
+my $user = defined($ENV{"USER"}) ? $ENV{"USER"} : "xtensa";
+$ovdir = $tmpdir."/tmp-overlay-${user}-$$";
+mkdir $ovdir or Error("cannot create directory $ovdir");
+$overlay_unpacked = 1;
+system("tar xfz '$overlay_tarball' -C '$ovdir'")
+	and Error("tar failed...");
+
+
+######################################################################
+#
+#  Define and sanity check contents of overlay
+#
+
+my $oldpack = -f $ovdir."/xtensa-elf/src/linux/misc/core.h";
+my $pf1 = ($oldpack ? "src/" : "");
+my $pf2 = ($oldpack ? "xtensa-elf/src/linux/misc/" : "config/");
+
+my @packages = (
+	["binutils", "toolchain/binutils",
+		["${pf1}/binutils/xtensa-modules.c",	"bfd/"],
+		["${pf1}/binutils/xtensa-config.h",	"include/"],
+		#["${pf1}/binutils/xtensa-config.sh",	"ld/emulparams/"],
+		],
+	["gcc", "toolchain/gcc",
+		["${pf1}/gcc/xtensa-config.h",	"include/"],
+		],
+	["gdb", "toolchain/gdb",
+		["${pf1}/gdb/xtensa-modules.c",	"bfd/"],
+		["${pf1}/gdb/xtensa-config.h",	"include/"],
+		["${pf1}/gdb/xtensa-config.c",	"gdb/"],
+		["${pf1}/gdb/xtensa-regmap.c",	"gdb/gdbserver/"],
+		["${pf1}/gdb/xtensa-regmap.c",	"gdb/gdbserver/xtensa-xtregs.c"],	# for GDB 6.8
+		["${pf1}/gdb/xtensa-regmap.c",	"gdb/xtensa-xtregs.c"],			# for GDB 6.8
+		["${pf1}/gdb/reg-xtensa.dat",	"gdb/regformats/"],
+		],
+	["kernel", "target/xtensa",		# ???
+		["${pf2}core.h",	"include/asm-xtensa/variant-${config_name}/"],
+		["${pf2}tie.h",		"include/asm-xtensa/variant-${config_name}/"],
+		["${pf2}tie-asm.h",	"include/asm-xtensa/variant-${config_name}/"],
+		],
+);
+
+#  Check that all files are present ...
+foreach my $pack (@packages) {
+    my ($pname, $buildroot_subdir, @files) = @$pack;
+    print "Checking files for $pname ...\n";
+    foreach my $f (@files) {
+	my ($src, $dst) = @$f;
+	-f $ovdir."/".$src or Error("missing '$src' in overlay tarball");
+    }
+}
+
+
+######################################################################
+#
+#  Extract some useful information
+#
+
+#  Extract core name as specified in the build.
+my $coreh = readfile($ovdir."/".$pf2."core.h");
+
+$coreh =~ /^\s*\#\s*define\s+XCHAL_SW_VERSION\s+(\w+)/m;
+my $swversion = $1;
+defined($swversion) or Error("missing XCHAL_SW_VERSION in overlay core.h file;\n"
+	."overlay is too old, need RB-2008.3 (SW version 7.1.1) or later");
+
+$coreh =~ /^\s*\#\s*define\s+XCHAL_CORE_ID\s+"([^"]+)"/m;
+my $coreid = $1;
+defined($coreid) or Error("missing XCHAL_CORE_ID in overlay core.h file");
+
+$coreh =~ /^\s*\#\s*define\s+XCHAL_HW_VERSION_NAME\s+"([^"]+)"/m;
+my $hwversion = $1;
+defined($hwversion) or Error("missing XCHAL_HW_VERSION_NAME in overlay core.h file");
+
+
+$swvers_human = sprintf("%u.%u.%u",
+	$swversion/100000, (($swversion/1000) % 100), ($swversion % 1000));
+my $release = "software version $swvers_human";
+if (-f $ovdir."/release") {
+    $release = readfile($ovdir."/release");
+    chomp($release);
+}
+
+
+######################################################################
+#
+#  Prompt user to be sure this is what he wants to do
+#
+
+#  Catch Ctrl-C so we can do a proper cleanup:
+sub catch_term {
+    my $signame = shift;
+    #print STDERR "whoa!\n";
+    cleanup();
+    print STDERR "\n$progname: Cleaned up.\n";
+    exit 3;
+}
+$SIG{TERM} = \&catch_term;
+$SIG{HUP} = \&catch_term;
+$SIG{INT} = \&catch_term;
+
+$| = 1;
+print	"\n",
+	"About to generate package-specific overlay tarballs for the following:\n",
+	"\n",
+	"   Xtensa processor short name:   $config_name\n";
+print	"      This short name overrides the name specified in the XPG:  $coreid\n" if $coreid ne $config_name;
+#print	"      Please ensure that's the name you want.  If submitted to the open source\n",
+#	"      community, it can be a hassle to change later on.\n";
+print	"   Xtensa processor description:  $config_long_name\n",
+	"   Targeting Xtensa HW version:   $hwversion\n",
+	"   Xtensa configuration overlay:  $overlay_tarball\n",
+	"           (release of overlay):  $release\n",
+	"   Destination buildroot dir:     ".(defined($buildroot_dir)?$buildroot_dir:"(none, not installed)")."\n",
+	"   Destination Linux kernel dir:  ".(defined($kernel_dir)?$kernel_dir:"(none, not installed)")."\n",
+	"\n",
+	"Are you sure? (y/n) ";
+if ($prompt) {
+    my $line = <STDIN>;
+    chomp($line);
+    if ($line !~ /^y(es)?$/i) {
+	print "\nInstallation aborted.\n";
+	cleanup();
+	exit 2;
+    }
+} else {
+    print "YES [no prompt]\n";
+}
+print "\n";
+
+
+######################################################################
+#
+#  Now generate the tarballs
+#
+
+#  Now generate each tarball ...
+foreach my $pack (@packages) {
+    my ($pname, $buildroot_subdir, @files) = @$pack;
+    my $tarname = "${pname}-xtensa_${config_name}.tgz";
+    my $fulltarname;
+    if (defined($buildroot_dir)) {
+	my $tarsubname = $buildroot_subdir . "/" . $tarname;
+	print "Generating and installing $tarsubname ...\n";
+	$fulltarname = $buildroot_dir . "/" . $tarsubname;
+    } else {
+	print "Generating $tarname ...\n";
+	$fulltarname = $ovdir . "/" . $tarname;
+    }
+    if (-e $fulltarname) {
+	if ($force_clobber or !defined($buildroot_dir)) {
+	    unlink($fulltarname) or Error("could not delete '$fulltarname': $!");
+	} else {
+	    Error("destination tarball already exists: '$fulltarname'");
+	}
+    }
+    my $pdir = $ovdir."/tmp-".$pname;
+    system("rm -fr '${pdir}' 2>/dev/null");
+    mkdir $pdir or Error("cannot create directory $pdir");
+    foreach my $f (@files) {
+	my ($src, $dst) = @$f;
+	#  If $dst ends in / , take filename from $src :
+	if ($dst =~ m|/$|) {
+	    my $fname = $src;
+	    $fname =~ s|^.*/||;
+	    $dst .= $fname;
+	}
+	#  Ensure destination directory exists:
+	my $dstdir = $pdir;
+	while ($dst =~ s|^([^/]+)/+||) {
+	    $dstdir .= "/" . $1;
+	    mkdir($dstdir);
+	}
+	#  Read file:
+	my $content = readfile($ovdir."/".$src);
+
+	#  Adjust contents of file.
+	#  Fix-up typo:
+	$content =~ s/XCHAL_SA_(NCP|CP\d+)_/XCHAL_$1_SA_/g;
+	#  Update core name info:
+	my $iscore = ($content =~ s/^(\s*\#\s*define\s+XCHAL_CORE_ID\s+)"[^"]+"/$1"$config_name"/mg);
+	$iscore or $content =~ s{^(\s*\#\s*define\s+XCHAL_INST_FETCH_WIDTH\s+\S+\s*(/\*[^\*]*\*/)?\s*$)}
+				{$1\n\#undef XCHAL_CORE_ID\n\#define XCHAL_CORE_ID\t\t\t"$config_name"\n}smg;
+	#  Update core description info:
+	$content =~ s/^(\s*\#\s*define\s+XCHAL_CORE_DESCRIPTION\s+)"[^"]+"/$1"$config_long_name"/mg
+	  or $content =~ s{^(\s*\#\s*define\s+XCHAL_CORE_ID\s+\S+\s*(/\*[^\*]*\*/)?\s*$)}
+			  {"$1\n" . ($iscore ? "" : "\n\#undef XCHAL_CORE_DESCRIPTION\n")
+			   . "\#define XCHAL_CORE_DESCRIPTION\t\t\"${config_long_name}\""}smge;
+
+	#  Write (possibly modified) file:
+	writefile($dstdir."/".$dst, $content);
+    }
+    my $tarcmd = "tar cfz '${fulltarname}' -C '${pdir}' .";
+    system($tarcmd) and Error("failed executing: $tarcmd");
+
+    #  Install Linux kernel overlay:
+    if ($pname eq "kernel" and defined($kernel_dir)) {
+	print "Installing Linux kernel overlay from $tarname ...\n";
+	my $untarcmd = "tar xfz '${fulltarname}' -C '${kernel_dir}' .";
+	system($untarcmd) and Error("failed executing: $tarcmd");
+    }
+    #  Possible TODO:  update arch/xtensa/{Kconfig,Makefile} to add this config?
+}
+
+
+######################################################################
+#
+# The End
+#
+
+cleanup();
+print "Done.\n";
+exit 0;
+