## NUCLEI RISCV GCC COMPILER
## NUCLEI RISCV OPENOCD
#
#!< Nuclei SDK Tools Root
COMPILE_PREFIX ?= riscv-nuclei-elf-
NUCLEI_SDK_TOOL_ROOT ?= $(NUCLEI_SDK_ROOT)/prebuilt_tools
NUCLEI_RISCV_GCC_ROOT ?= $(NUCLEI_SDK_TOOL_ROOT)/gcc
NUCLEI_OPENOCD_ROOT ?= $(NUCLEI_SDK_TOOL_ROOT)/openocd

NUCLEI_SDK_TOOL_ROOT_EXIST = 0
ifneq ($(wildcard $(NUCLEI_RISCV_GCC_ROOT)),)
ifneq ($(wildcard $(NUCLEI_OPENOCD_ROOT)),)
NUCLEI_SDK_TOOL_ROOT_EXIST = 1
endif
endif

ifeq ($(NUCLEI_SDK_TOOL_ROOT_EXIST),1)
CC      := $(abspath $(NUCLEI_RISCV_GCC_ROOT)/bin/$(COMPILE_PREFIX)gcc)
CXX     := $(abspath $(NUCLEI_RISCV_GCC_ROOT)/bin/$(COMPILE_PREFIX)g++)
OBJDUMP := $(abspath $(NUCLEI_RISCV_GCC_ROOT)/bin/$(COMPILE_PREFIX)objdump)
OBJCOPY := $(abspath $(NUCLEI_RISCV_GCC_ROOT)/bin/$(COMPILE_PREFIX)objcopy)
GDB     := $(abspath $(NUCLEI_RISCV_GCC_ROOT)/bin/$(COMPILE_PREFIX)gdb)
AR      := $(abspath $(NUCLEI_RISCV_GCC_ROOT)/bin/$(COMPILE_PREFIX)ar)
SIZE    := $(abspath $(NUCLEI_RISCV_GCC_ROOT)/bin/$(COMPILE_PREFIX)size)
OPENOCD := $(abspath $(NUCLEI_OPENOCD_ROOT)/bin/openocd)
else
CC      := $(COMPILE_PREFIX)gcc
CXX     := $(COMPILE_PREFIX)g++
OBJDUMP := $(COMPILE_PREFIX)objdump
OBJCOPY := $(COMPILE_PREFIX)objcopy
GDB     := $(COMPILE_PREFIX)gdb
AR      := $(COMPILE_PREFIX)ar
SIZE    := $(COMPILE_PREFIX)size
OPENOCD := openocd
endif

include $(NUCLEI_SDK_BUILD)/Makefile.soc

# Set your GDB port using variable GDB_PORT
GDB_PORT ?= 3333
## Makefile Variable GDBREMOTE
# You can change GDBREMOTE to other gdb remotes
## eg. if you have started openocd server with (bindto 0.0.0.0 defined in openocd.cfg)
## make sure your machine can connect to remote machine
## in remote machine(ipaddr 192.168.43.199, port 3333) which connect the hardware board,
## then you can change the GDBREMOTE to 192.168.43.199:3333
## GDBREMOTE ?= 192.168.43.199:3333
GDBREMOTE ?= | $(OPENOCD) -c \"gdb_port pipe; log_output openocd.log\" -f $(OPENOCD_CFG)

GDB_UPLOAD_ARGS ?= --batch
GDB_UPLOAD_CMDS += -ex "monitor halt"
GDB_UPLOAD_CMDS += -ex "load"
GDB_UPLOAD_CMDS += -ex "monitor resume"
GDB_UPLOAD_CMDS += -ex "quit"

OPENOCD_PORT_ARGS = -c "gdb_port $(GDB_PORT)"

OPENOCD_ARGS += -f $(OPENOCD_CFG)
GDB_CMDS += -ex "set remotetimeout 240"
GDB_CMDS += -ex "target extended-remote localhost:$(GDB_PORT)"

SUPPORT_DOWNLOAD_MODES=flash flashxip ilm ddr
DOWNLOAD_UPPER = $(call uc, $(DOWNLOAD))
SUPPORT_DOWNLOAD_MODES_UPPER=$(call uc, $(SUPPORT_DOWNLOAD_MODES))

VALID_DOWNLOAD = $(call check_item_exist, $(DOWNLOAD_UPPER), $(SUPPORT_DOWNLOAD_MODES_UPPER))

include $(NUCLEI_SDK_BUILD)/Makefile.files
include $(NUCLEI_SDK_BUILD)/Makefile.rtos

ifeq ($(VALID_DOWNLOAD),)
$(error Download mode $(DOWNLOAD) is not supported, support modes: $(SUPPORT_DOWNLOAD_MODES))
endif

DEFAULT_RISCV_ARCH ?= rv32imac
DEFAULT_RISCV_ABI ?= ilp32
ifeq ($(RISCV_ARCH),)
$(warning RISCV_ARCH is not defined, use $(DEFAULT_RISCV_ARCH) as default)
RISCV_ARCH := $(DEFAULT_RISCV_ARCH)
endif
ifeq ($(RISCV_ABI),)
$(warning RISCV_ABI is not defined, use $(DEFAULT_RISCV_ABI) as default)
RISCV_ABI := $(DEFAULT_RISCV_ABI)
endif

MKDEP_OPT = -MMD -MT $@ -MF $@.d
C_INCLUDE_OPT = $(foreach dir,$(sort $(INCDIRS) $(C_INCDIRS)),-I$(dir))
CXX_INCLUDE_OPT = $(foreach dir,$(sort $(INCDIRS) $(CXX_INCDIRS)),-I$(dir))
ASM_INCLUDE_OPT = $(foreach dir,$(sort $(INCDIRS) $(ASM_INCDIRS)),-I$(dir))

ifeq ($(NOGC),1)
GC_CFLAGS =
GC_LDFLAGS =
else
GC_CFLAGS = -ffunction-sections -fdata-sections
GC_LDFLAGS = -Wl,--gc-sections -Wl,--check-sections
endif

ifeq ($(SIMULATION),1)
COMMON_FLAGS += -DCFG_SIMULATION
endif

ifeq ($(NEWLIB),nano)
NEWLIB_LDFLAGS = --specs=nano.specs
ifeq ($(PFLOAT),1)
NEWLIB_LDFLAGS += -u _printf_float
endif
else
NEWLIB_LDFLAGS =
endif

ifeq ($(SIMU),xlspike)
COMMON_FLAGS += -DSIMULATION_XLSPIKE
endif

COMMON_FLAGS += -g -march=$(RISCV_ARCH) -mabi=$(RISCV_ABI) -mcmodel=medany \
		$(GC_CFLAGS) -fno-common -DDOWNLOAD_MODE=DOWNLOAD_MODE_$(DOWNLOAD_UPPER)

CFLAGS += $(COMMON_FLAGS) $(C_INCLUDE_OPT) $(MKDEP_OPT)
CXXFLAGS += $(COMMON_FLAGS) $(CXX_INCLUDE_OPT) $(MKDEP_OPT)
ASMFLAGS += $(COMMON_FLAGS) $(ASM_INCLUDE_OPT) $(MKDEP_OPT)

LIB_OPT = $(addprefix -L, $(sort $(LIBDIRS)))

LDFLAGS += -T $(LINKER_SCRIPT) -lstdc++ -nostartfiles -Wl,-M,-Map=$(TARGET).map \
		$(GC_LDFLAGS) $(NEWLIB_LDFLAGS) --specs=nosys.specs \
		$(LIB_OPT) $(LDLIBS)

# More options needed by -flto, if not passed, will fail in linking phase
LDFLAGS += -u _isatty -u _write -u _sbrk -u _read -u _close -u _fstat -u _lseek

# Prerequesties
MAKEFILE_PREREQS += $(NUCLEI_SDK_BUILD)/Makefile.base
MAKEFILE_PREREQS += $(NUCLEI_SDK_BUILD)/Makefile.soc
MAKEFILE_PREREQS += $(NUCLEI_SDK_BUILD)/Makefile.soc.$(SOC)
MAKEFILE_PREREQS += $(NUCLEI_SDK_BUILD)/Makefile.conf
MAKEFILE_PREREQS += $(NUCLEI_SDK_BUILD)/Makefile.core
MAKEFILE_PREREQS += $(NUCLEI_SDK_BUILD)/Makefile.files
MAKEFILE_PREREQS += $(NUCLEI_SDK_BUILD)/Makefile.files.$(SOC)
MAKEFILE_PREREQS += $(NUCLEI_SDK_BUILD)/Makefile.misc
MAKEFILE_PREREQS += $(NUCLEI_SDK_BUILD)/Makefile.rules
MAKEFILE_PREREQS += $(EXTRA_MKS)
MAKEFILE_PREREQS += Makefile

LINK_PREREQS += $(LINKER_SCRIPT)

COMMON_PREREQS = $(MAKEFILE_PREREQS) $(LINK_PREREQS)