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#-- Bring toolchain config parameters from the common makefile

include ../common/makefile

# Link script to be used: run from BRAM

LINK_SCRIPT = $(SRC_DIR)/common/bram.lds

#-- Configure the application --------------------------------------------------

# Simulation length in cycles; long enough to let the program run to completion.

SIM_LENGTH = 90000

# FPGA Block RAM parameters

BRAM_START = 0xbfc00000

CODE_BRAM_SIZE = 2048

# External RAM parameters (size in words)

XRAM_SIZE = 1024

XRAM_START = 0x00000000

# 1.- Put the code in internal BRAM and the data in external SRAM.

# 2.- Do not use any of the standard libraries and use libsoc instead.

LFLAGS = -T$(LINK_SCRIPT) -L $(LIB_PATH) \

         -Ttext $(BRAM_START) -Tdata $(XRAM_START) \

         -nodefaultlibs -nostdlib -ereset -I elf32-big

CFLAGS = -O2 -Wall -c -s -fno-builtin -nodefaultlibs -nostdlib \

         -msoft-float -mips1 -G0

AFLAGS = --defsym XRAM_BASE=$(XRAM_START)

OBJS = bootstrap.o opcode_emu.o c_startup.o hello.o

#-- Targets & rules ------------------------------------------------------------

hello: hello.code hello.data

        @# This comment prevents use of implicit rule so our rules are used instead.

        @# This will save us a few harmless linker warnings.

hello.axf: $(OBJS)

        $(LD) $(LFLAGS) -Map hello.map -s -N -o hello.axf $(OBJS) -lsoc

        -@$(DUMP) -m mips --disassemble hello.axf > hello.lst

hello.code: hello.axf

# Extract object code to be placed in code space

        $(COPY) -I elf32-big -O binary hello.axf hello.code

hello.data: hello.axf

# Extract object code to be placed in data space

        $(COPY) -I elf32-big -j.data -j.bss -O binary hello.axf hello.data

bootstrap.o: $(SRC_DIR)/common/bootstrap.s

        $(AS) $(AFLAGS) -o bootstrap.o $(SRC_DIR)/common/bootstrap.s

c_startup.o: $(SRC_DIR)/common/c_startup.s

        $(AS) $(AFLAGS) -o c_startup.o $(SRC_DIR)/common/c_startup.s

opcode_emu.o: $(SRC_DIR)/common/opcode_emu.s

        $(AS) $(AFLAGS) -o opcode_emu.o $(SRC_DIR)/common/opcode_emu.s

hello.o: hello.c

        $(CC) $(CFLAGS) -o hello.o hello.c

#-- Targets that build the synthesizable vhdl; meant for direct invocation -----

#-- Create VHDL file for simulation test bench using TB2 template

sim: hello

        $(TO_VHDL) --code hello.code --data hello.data \

                --code_size $(CODE_BRAM_SIZE) --data_size $(XRAM_SIZE) \

                --log_trigger=0xbfc00000 \

                -s $(SIM_LENGTH) -v $(SRC_DIR)/mips_tb2_template.vhdl \

                -o $(TB_DIR)/mips_tb2.vhdl -e mips_tb2

#-- Create VHDL file for simulation test bench using TB0 template

sim_bram: hello

        $(TO_VHDL) --code hello.code --data hello.data \

                --code_size $(CODE_BRAM_SIZE) --data_size $(XRAM_SIZE) \

                -s $(SIM_LENGTH) -v $(SRC_DIR)/mips_tb0_template.vhdl \

                -o $(TB_DIR)/mips_tb2.vhdl -e mips_tb2

#-- Create VHDL file for hardware demo

demo: hello

        $(TO_VHDL) --code hello.code --data hello.data \

        --code_size $(CODE_BRAM_SIZE) --data_size $(XRAM_SIZE) \

        -v $(SRC_DIR)/code_rom_template.vhdl -n "Hello World" \

        -o $(DEMO_DIR)/code_rom_pkg.vhdl

#-- And now the usual housekeeping stuff ---------------------------------------

.PHONY: clean

clean:

        -$(RM) *.o *.obj *.map *.lst *.hex *.exe *.axf *.code *.data *.bin