#
# TinyEMU emulator
# 
# Copyright (c) 2016-2018 Fabrice Bellard
#
# 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.
#

# artifact paths
JS:=js
SRC:=src
BUILD:=build/js

# Build the Javascript version of TinyEMU
EMCC=emcc
EMCFLAGS=-O2 --llvm-opts 2 -Wall -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -MMD -fno-strict-aliasing -DCONFIG_FS_NET
#EMCFLAGS+=-Werror
EMLDFLAGS=-O3 --closure 0 -s NO_EXIT_RUNTIME=1 -s NO_FILESYSTEM=1 -s "EXPORTED_FUNCTIONS=['_console_queue_char','_vm_start','_fs_import_file','_display_key_event','_display_mouse_event','_display_wheel_event','_net_write_packet','_net_set_carrier']" -s 'EXPORTED_RUNTIME_METHODS=["ccall", "cwrap"]' --js-library $(JS)/lib.js
EMLDFLAGS_ASMJS:=$(EMLDFLAGS) -s WASM=0
EMLDFLAGS_WASM:=$(EMLDFLAGS) -s WASM=1 -s TOTAL_MEMORY=67108864 -s ALLOW_MEMORY_GROWTH=1

PROGS=$(addprefix $(JS)/,riscvemu32.js riscvemu32-wasm.js riscvemu64.js riscvemu64-wasm.js)

all: $(BUILD) $(PROGS)

JS_OBJS=jsemu.js.o softfp.js.o virtio.js.o fs.js.o fs_net.js.o fs_wget.js.o fs_utils.js.o simplefb.js.o pci.js.o json.js.o block_net.js.o
JS_OBJS+=iomem.js.o cutils.js.o aes.js.o sha256.js.o

RISCVEMU64_OBJS=$(addprefix $(BUILD)/,$(JS_OBJS) riscv_cpu64.js.o riscv_machine.js.o machine.js.o)
RISCVEMU32_OBJS=$(addprefix $(BUILD)/,$(JS_OBJS) riscv_cpu32.js.o riscv_machine.js.o machine.js.o)

# build path macro
define mkbuild
$(addprefix $(BUILD)/,$1)
endef

$(JS)/riscvemu64.js: $(RISCVEMU64_OBJS) $(JS)/lib.js
	$(EMCC) $(EMLDFLAGS_ASMJS) -o $@ $(RISCVEMU64_OBJS)

$(JS)/riscvemu32.js: $(RISCVEMU32_OBJS) $(JS)/lib.js
	$(EMCC) $(EMLDFLAGS_ASMJS) -o $@ $(RISCVEMU32_OBJS)

$(JS)/riscvemu64-wasm.js: $(RISCVEMU64_OBJS) $(JS)/lib.js
	$(EMCC) $(EMLDFLAGS_WASM) -o $@ $(RISCVEMU64_OBJS)

$(JS)/riscvemu32-wasm.js: $(RISCVEMU32_OBJS) $(JS)/lib.js
	$(EMCC) $(EMLDFLAGS_WASM) -o $@ $(RISCVEMU32_OBJS)

$(BUILD)/riscv_cpu32.js.o: $(SRC)/riscv_cpu.c
	$(EMCC) $(EMCFLAGS) -DMAX_XLEN=32 -DCONFIG_RISCV_MAX_XLEN=32 -c -o $@ $<

$(BUILD)/riscv_cpu64.js.o: $(SRC)/riscv_cpu.c
	$(EMCC) $(EMCFLAGS) -DMAX_XLEN=64 -DCONFIG_RISCV_MAX_XLEN=64 -c -o $@ $<

$(BUILD)/%.js.o: $(SRC)/%.c
	$(EMCC) $(EMCFLAGS) -c -o $@ $<

.PHONY: $(BUILD)
$(BUILD):
	@mkdir -p $(BUILD)/js

.PHONY: clean
clean:
	rm -rf $(BUILD)

-include $(wildcard $(BUILD)/*.d)