--- /dev/null
+# Makefile for XTOS in <xtensa_tools_root>/xtensa-elf/src/xtos
+
+# Copyright (c) 2000-2010 Tensilica Inc.
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be included
+# in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+#
+# This makefile assumes GNU make features
+#
+# Invoke this Makefile like this:
+# cd <some build directory>
+# make -f <this file> \
+# MAKEFILE_SRC=<this file> \
+# XTENSA_TOOLS_ROOT=<path to Xtensa Tools> \
+# XTENSA_ROOT=<path to Xtensa core package> \
+# INSTLIBDIR=<path to installation directory>
+#
+
+ifndef XTENSA_TOOLS_ROOT
+$(error Please set XTENSA_TOOLS_ROOT to the path to Xtensa Tools)
+endif
+# NOTE: For now, we assume $(XTENSA_TOOLS_ROOT)/bin is on the PATH.
+ifndef XTENSA_ROOT
+$(error Please set XTENSA_ROOT to the path to your specific Xtensa core package)
+endif
+ifndef INSTLIBDIR
+$(error Please set INSTLIBDIR to the path where libraries and objects are installed)
+#INSTLIBDIR = $(call fixpath,$(XTENSA_ROOT)/xtensa-elf/arch/lib)
+endif
+
+# Select the specified Xtensa configuration:
+export XTENSA_SYSTEM = $(XTENSA_ROOT)/config
+export XTENSA_CORE = default
+
+include $(XTENSA_TOOLS_ROOT)/misc/defs.mk
+include $(XTENSA_ROOT)/misc/build.mk
+
+ifndef SRCDIR
+$(error Please set MAKEFILE_SRC to the path to the XTOS Makefile.src)
+endif
+
+# Native commands like $(MKPATH) and $(CP) need native directory separators:
+#fixpath = $(subst /,$S,$(1))
+
+XTCC = $(CC_FOR_TARGET)
+XTAR = xt-ar
+
+.PHONY: all install clean
+
+# Compilation flags
+ASFLAGS = -O2 -g -mlongcalls
+CFLAGS = -O2 -g -mlongcalls
+
+# File splitting:
+# Compile "split" files in separate parts that can be linked independently.
+# This allows keeping multiple related functions/etc together in one file
+# without forcing linking of unused functions (the GNU linker takes entire
+# object files; it does not currently provide automated dead code removal).
+# Files are split with "#[el]if defined(__SPLIT__<tag>)" lines using normal
+# C preprocessor syntax, where each <tag> must be unique and consist of
+# lowercase alphanumeric and underscore characters only (no dash etc).
+# The makefile function $(split_objs ...) returns the set of objects that
+# result for a given list of splittable source files; each ends in a -.o
+# suffix recognized by special rules further below.
+#
+split_objs = $(shell cd $(SRCDIR) && $(PERL) -ne '/__SPLIT__(\w+)/ and $$h{$$ARGV."--".$$1}++;\
+ END {foreach (sort keys %h) {s/\.(.)--/-$$1--/; print "$$_-.o\n";}}' $(1))
+
+# Vectors, handlers, and other code to build:
+PERLEVEL_INTVECTOR_OBJS = $(foreach N,2 3 4 5 6,int-vector-level$(N).o)
+PERLEVEL_INTHANDLER_OBJS = $(foreach N,2 3 4 5 6,int-handler-level$(N).o)
+PERLEVEL_INTINITLEV_OBJS = $(foreach N,1 2 3 4 5 6,int-init-level$(N).o)
+XTOS_COMMON_OBJS = \
+ reset-vector-unpack.o \
+ shared-reset-vector.o \
+ user-vector.o \
+ nmi-vector.o \
+ window-vectors.o \
+ reloc-vectors.o \
+ $(call split_objs, memerror-vector.S) \
+ $(PERLEVEL_INTVECTOR_OBJS) \
+ exc-alloca-handler.o \
+ exc-return.o \
+ exc-sethandler.o \
+ exc-syscall-handler.o \
+ exc-syscall-c-handler.o \
+ exc-table.o \
+ exit.o \
+ init.o \
+ int-lowpri-dispatcher.o \
+ int-sethandler.o \
+ intlevel-set.o \
+ intlevel-setmin.o \
+ intlevel-restore.o \
+ ints-on.o \
+ ints-off.o \
+ switch_context.o \
+ $(call split_objs, deprecated.S tiny-refs.S) \
+ $(PERLEVEL_INTHANDLER_OBJS) \
+ $(PERLEVEL_INTINITLEV_OBJS)
+# These objects have simulator and board variants:
+XTOS_SIMBOARD_OBJS = \
+ debug-vector.o \
+ double-vector.o \
+ kernel-vector.o \
+ interrupt-table.o \
+ exc-unhandled.o \
+ exc-c-wrapper-handler.o \
+ memep-initrams.o \
+ memep-enable.o
+XTOS_BOARD_OBJS = $(XTOS_SIMBOARD_OBJS)
+XTOS_SIM_OBJS = $(XTOS_SIMBOARD_OBJS:.o=-sim.o)
+
+# Optimize a few things for size rather than speed:
+#FLAGS_exc-syscall-handler = -Os --no-target-align
+
+TARGETS = \
+ _vectors.o \
+ _sharedvectors.o \
+ _sharedvectors-for-reset.o \
+ crt0-app.o \
+ crt1-boards.o \
+ crt1-tiny.o \
+ crt1-sim.o \
+ libhandlers-sim.a \
+ libhandlers-board.a \
+ libhandlers-min.a \
+ libhandlers-null.a \
+ libnomovsp.a \
+ libnosyscall.a \
+ libhandler-reset-unpack.a \
+ libhandler-reset.a
+ifdef TENSILICA_INTERNAL
+TARGETS += libhandler-reset-mp.a
+endif
+
+all: $(TARGETS)
+
+
+# Here's an example of how one could put a selected set of
+# objects into a specific section:
+#
+#XTOSSECFLAGS = \
+# -mrename-section-.text=.xtos.text \
+# -mrename-section-.literal=.xtos.literal \
+# -mrename-section-.rodata=.xtos.rodata \
+# -mrename-section-.data=.xtos.data
+#$(XTOS_SIM_OBJS) : XTFLAGS = $(XTOSSECFLAGS)
+
+libhandlers-sim.a: $(XTOS_SIM_OBJS) $(XTOS_COMMON_OBJS)
+
+libhandlers-board.a: $(XTOS_BOARD_OBJS) $(XTOS_COMMON_OBJS)
+
+libhandlers-min.a: user-vector-min.o tiny-refs-min.o
+
+libhandlers-null.a: $(call split_objs, null-vectors.S) _vectors.o _sharedvectors.o
+
+libnomovsp.a: null-alloca.o
+
+libnosyscall.a: null-syscall.o
+
+$(PERLEVEL_INTVECTOR_OBJS): int-vector-level%.o: int-vector.S
+ $(XTCC) -c $(ASFLAGS) $(FLAGS_int-vector-level$*) $(XTFLAGS) -D_INTERRUPT_LEVEL=$* -o $@ $<
+
+$(PERLEVEL_INTHANDLER_OBJS): int-handler-level%.o: int-handler.S
+ $(XTCC) -c $(ASFLAGS) $(FLAGS_int-handler-level$*) $(XTFLAGS) -D_INTERRUPT_LEVEL=$* -o $@ $<
+
+$(PERLEVEL_INTINITLEV_OBJS): int-init-level%.o: int-initlevel.S
+ $(XTCC) -c $(ASFLAGS) $(FLAGS_int-init-level$*) $(XTFLAGS) -D_INTERRUPT_LEVEL=$* -o $@ $<
+
+
+# For split-source rules, determine various things from $* (extended basename):
+#
+SPLIT_SRC = $(patsubst %/,%,$(dir $(subst -c--,.c/,$(subst -S--,.S/,$*))))
+SPLIT_FLAGS = $(FLAGS_$(basename $(SPLIT_SRC))) \
+ -D__SPLIT__$(notdir $(subst --,/,$*))
+
+# (Okay we cheat a bit, CFLAGS matches ASFLAGS so this works; it's also simpler:)
+%-.o:
+ $(XTCC) -c $(CFLAGS) $(SPLIT_FLAGS) $(XTFLAGS) -o $@ $(SRCDIR)/$(SPLIT_SRC)
+%--sim.o:
+ $(XTCC) -c $(CFLAGS) $(SPLIT_FLAGS) $(XTFLAGS) -DSIMULATOR -o $@ $(SRCDIR)/$(SPLIT_SRC)
+
+
+%.o: %.S
+ $(XTCC) -c $(ASFLAGS) $(FLAGS_$*) $(XTFLAGS) $<
+
+%.o: %.c
+ $(XTCC) -c $(CFLAGS) $(FLAGS_$*) $(XTFLAGS) $<
+
+%-sim.o: %.S
+ $(XTCC) -c $(ASFLAGS) $(FLAGS_$*) $(XTFLAGS) -DSIMULATOR -o $@ $<
+
+%-sim.o: %.c
+ $(XTCC) -c $(CFLAGS) $(FLAGS_$*) $(XTFLAGS) -DSIMULATOR -o $@ $<
+
+# Explicit rule for crt1-sim.o to avoid using %-sim.o rule above:
+crt1-sim.o: crt1-sim.S
+ $(XTCC) -c $(ASFLAGS) $(FLAGS_$*) $(XTFLAGS) $<
+
+
+# When building the reset vector, leave the literals in
+# the text section, so that the reset vector can be placed
+# at address 0 (there's no lower address for the literals).
+# (Can't do that on Xtensa TX without load/store to IRAM/IROM.)
+
+ifneq ($(XPAL_HAVE_IMEM_LOADSTORE),0)
+FLAGS_reset-vector = -mtext-section-literals
+FLAGS_shared-reset-vector = -mtext-section-literals
+endif
+
+#reset-vector.o: reset-vector.S
+# $(XTCC) -c $(ASFLAGS) $(XTFLAGS) $(FLAGS_reset-vector) -o $@ $<
+reset-vector-unpack.o: reset-vector.S
+ $(XTCC) -c $(ASFLAGS) $(XTFLAGS) $(FLAGS_reset-vector) -DXTOS_UNPACK -o $@ $<
+reset-vector-mp.o: reset-vector.S
+ $(XTCC) -c $(ASFLAGS) $(XTFLAGS) $(FLAGS_reset-vector) -DXTOS_MP -o $@ $<
+#
+# These libraries provide alternative reset vectors:
+# With ROM unpacking (the default):
+libhandler-reset-unpack.a: reset-vector-unpack.o
+# Without any unpacking:
+libhandler-reset.a: reset-vector.o
+# With experimental MP unpacking:
+libhandler-reset-mp.a: reset-vector-mp.o
+
+%.a:
+ -$(RM) $@
+ $(XTAR) rs $@ $^
+
+install:
+ -$(MKPATH) $(INSTLIBDIR)
+ $(CP) $(TARGETS) $(INSTLIBDIR)
+
+clean:
+ -$(RM) *.o *.a
+
+# NOTE: Header file dependencies not specified!
+
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