# Makefile for the link-time HAL in <xtensa_tools_root>/xtensa-elf/src/hal

# Copyright (c) 1999-2013 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> 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

ifndef SRCDIR
$(error Please set MAKEFILE_SRC to the path to this Makefile.src)
endif

CFLAGS = -O2 -g -mlongcalls

#  Uncomment this to compile deprecated (pre-T1020.2) beta HAL definitions:
#CFLAGS += -DINCLUDE_DEPRECATED_HAL_CODE
#  Uncomment this to compile deprecated (pre-T1040.2) debug-support definitions:
#CFLAGS += -DINCLUDE_DEPRECATED_HAL_DEBUG_CODE
#  Uncomment this to compile deprecated (pre-T1040.2) cache-support definitions:
#CFLAGS += -DINCLUDE_DEPRECATED_HAL_CACHE_CODE


#  Compile parts of these files separately, to avoid unnecessarily large
#  objects without creating too many source files.
#  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).

SPLIT_SOURCES = interrupts.c int_asm.S cache_asm.S state_asm.S state.c mem_ecc_parity.S \
		miscellaneous.S disass.c

#  Determine split object files to create, of form <srcbasename>--<tag>.o :
SPLIT_OBJS := $(shell cd $(SRCDIR) && $(PERL) -ne '/__SPLIT__(\w+)/ and $$h{$$ARGV."--".$$1}++;\
 END {foreach (sort keys %h) {s/\..--/--/; print "$$_.o\n";}}' $(SPLIT_SOURCES))
#  Make doesn't stop if $(shell ...) fails, so catch any such failure explicitly:
ifeq ($(SPLIT_OBJS),)
$(error Error invoking $(PERL) to split sources $(SPLIT_SOURCES))
endif

#  Call0 ABI means the xthal... and xthal..._nw functions are
#  identical.  If we're building for Call0 ABI, omit the ..._nw
#  functions (except for xthal_get_intpending_nw, an interrupt handler
#  helper function for which there is no duplicate and which does not
#  obey _any_ calling conventions).

CALL0_ABI :=$(filter __XTENSA_CALL0_ABI__, $(shell echo '' | $(CC_FOR_TARGET) --xtensa-system=$(XTENSA_SYSTEM) --xtensa-core=$(XTENSA_CORE) -E -dM - ))
ifneq ($(CALL0_ABI),)
SPLIT_OBJS := $(filter-out %_nw.o,$(SPLIT_OBJS))
SPLIT_OBJS := $(SPLIT_OBJS) int_asm--get_intpending_nw.o
endif


OBJS = \
	cache.o			\
	syscache_asm.o		\
	attribute.o		\
	coherence.o		\
	clock.o			\
	debug.o			\
	disass.o                \
	debug_hndlr.o		\
	memcopy.o		\
	misc.o			\
	miscellaneous.o		\
	mmu.o			\
	mp_asm.o		\
	windowspill_asm.o	\
	set_region_translate.o	\
	$(SPLIT_OBJS)

HALLIB = libhal.a


.PHONY: all install clean

all: $(HALLIB)

$(HALLIB): $(OBJS)

#  For following rule, determine various things from $* (extended basename):
SPLIT_SOURCE = $(filter $(patsubst %/,%,$(dir $(subst --,/,$*))).%,$(SPLIT_SOURCES))
SPLIT_TAG    = $(notdir $(subst --,/,$*))
SPLIT_FLAGS  = $(FLAGS_$(basename $(SPLIT_SOURCE)))

$(SPLIT_OBJS): %.o:
	$(CC_FOR_TARGET) -c $(CFLAGS) $(SPLIT_FLAGS) $(SRCDIR)/$(SPLIT_SOURCE) -D__SPLIT__$(SPLIT_TAG) -MMD -MF $*.d -o $@

%.o: %.S
	$(CC_FOR_TARGET) -c $(CFLAGS) $(FLAGS_$*) $< -o $@

%.o: %.c
	$(CC_FOR_TARGET) -c $(CFLAGS) $(FLAGS_$*) $< -o $@

%.a:
	-$(RM) $@
	$(AR_FOR_TARGET) -rs $@ $^


install: all
	$(MKPATH) $(INSTLIBDIR)
	$(CP) $(HALLIB) $(INSTLIBDIR)

clean:
	-$(RM) $(OBJS) $(HALLIB) *.d

# NOTE: Header file dependencies not specified!
-include *.d