# environment vaiables read:
# BOARD = {ml402, denano, sim}
# TLB = {no, yes}
# ENDIANESS = {eb, el}
BOARD ?= ml402
TLB ?= no
ENDIANESS ?= eb
DEBUGGER ?= gdb
		
ifeq ($(ENDIANESS),el)
  ENDIAN_FLAGS=-EL
else
  ENDIAN_FLAGS=-EB
endif

ifeq ($(DEBUGGER),gdb)
	DBG_FLAGS := -DWITH_DEBUGGER -DWITH_GDB_STUB
	DBG_OBJ := gdb_stub.o
endif
ifeq ($(DEBUGGER),mips)
	DBG_FLAGS := -DWITH_DEBUGGER
	DBG_OBJ := mips_dbg.o mips_dis.o
endif
			  
CFLAGS=$(ENDIAN_FLAGS) -Os -ffunction-sections -fdata-sections -I. -I../libsys -msoft-float -march=r3000 -G0 -I../libsys/boards/$(BOARD) -D$(BOARD) $(DBG_FLAGS)
LFLAGS=$(ENDIAN_FLAGS) -Os -nostartfiles -nodefaultlibs -nostdlib -Wl,--gc-sections -Wl,-M 

ifeq ($(TLB),yes)
  CFLAGS+=-DSYS_IO_BASE=0xAC000000 -DSDRAM_BASE=0x80000000 -DFLASH_BASE_IO=0xA4000000 -DFLASH_BASE_MEM=0x88000000
  LFLAGS+=-T bootloader_tlb.ld
else
  CFLAGS+=-DSYS_IO_BASE=0xA0000000 -DSDRAM_BASE=0x40000000 -DFLASH_BASE_IO=0xA4000000 -DFLASH_BASE_MEM=0x00000000
  LFLAGS+=-T bootloader.ld
endif

BUILD_DIR=./build/$(BOARD)/$(ENDIANESS)
		  
LIBS=-lc -lgcc
CFLAGS += -DXCP_SIZE=4096
		  
CC=mips-elf-gcc
LD=mips-elf-gcc
OBJDUMP=mips-elf-objdump
OBJCOPY=mips-elf-objcopy
ROMGEN=romgen