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#-------------------------------------------------------------------------------
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#-------------------------------------------------------------------------------
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# This makefile does not contain any targets, only definitions used by the
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# This makefile does not contain any targets, only definitions used by the
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# makefiles of all the code samples.
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# makefiles of all the code samples.
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# It is meant to be included and not used standalone.
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# It is meant to be included and not used standalone.
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#-------------------------------------------------------------------------------
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#-------------------------------------------------------------------------------
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# SYSTEM PARAMETERS
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#
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# You can define here the size and address of the memory blocks of the system,
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# though you can't change the number and type of blocks here (see
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# /vhdl/mips_cache_*.vhdl).
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# Addresses are duplicated in the linker script (ion*.lds).
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#
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#-------------------------------------------------------------------------------
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# KNOWN PROBLEMS AND WORKAROUNDS
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# KNOWN PROBLEMS AND WORKAROUNDS
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#
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#
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# 1.- LINK PROBLEM IF FLAG '-G0' NOT USED
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# 1.- LINK PROBLEM IF FLAG '-G0' NOT USED
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# If flag '-G0' is not used on gcc, linker fails with 'relocation
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# If flag '-G0' is not used on gcc, linker fails with 'relocation
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# truncated to fit: R_MIPS_GPREL16' error message.
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# truncated to fit: R_MIPS_GPREL16' error message.
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# indexed access to any global variables.
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# indexed access to any global variables.
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# This is only necessary for the 'bare' target (no external ram and no
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# This is only necessary for the 'bare' target (no external ram and no
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# cache) and will have to be fixed for regular targets (by using a
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# cache) and will have to be fixed for regular targets (by using a
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# standard link script or fixing mine).
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# standard link script or fixing mine).
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#-------------------------------------------------------------------------------
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#-------------------------------------------------------------------------------
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# SYSTEM PARAMETERS
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#
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# All you can define here is the size of the VHDL RAM tables.
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# Some other system parameters are defined in the linker script (ion*.lds).
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#-------------------------------------------------------------------------------
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### Toolchain config ###########################################################
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### Toolchain config ###########################################################
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ifeq ($(LANG),)
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ifeq ($(LANG),)
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endif
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endif
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### System parameters ##########################################################
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### System parameters ##########################################################
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# FIXME clean up parameter names
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# 'CODE_BRAM' is meant to be a small BRAM (2 to 4KB) used for bootstrapping.
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# 'DATA_BRAM' is a small BRAM connected to the data ports, used for debugging.
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# 'XRAM' is meant to be the main external RAM, either SRAM or SDRAM.
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# Default location of code BRAM is on the reset vector address
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CODE_BRAM_ADDRESS = 0
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# Default size of code BRAM in 32-bit words
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# Default size of code BRAM in 32-bit words
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CODE_SIZE = 1024
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CODE_BRAM_SIZE = 1024
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# Default size of data BRAM in 32-bit words
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# Default size of data BRAM in 32-bit words
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DATA_SIZE = 256
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DATA_BRAM_SIZE = 256
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# Default address of BRAM -- used in some simulation-only tests, see makefiles
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DATA_BRAM_ADDRESS = 0x10000
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# Default size of data external RAM (XRAM) in 32-bit words (for simulation)
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XRAM_SIZE = 2048
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# Default address of XRAM
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XRAM_ADDRESS = 0x80000000
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### Build options ##############################################################
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### Build options ##############################################################
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# Don't use gcc builtin functions, and try to target MIPS-I architecture
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# Don't use gcc builtin functions, and try to target MIPS-I architecture
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# This will prevent usage of unimplemented opcodes but will insert nops after
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# load instructions, which Ion does not need.
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# (See comment above about -G0 flag)
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# (See comment above about -G0 flag)
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CFLAGS = -O2 -Wall -c -s -fno-builtin -mips1 -G0
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CFLAGS = -O2 -Wall -c -s -fno-builtin -mips1 -G0
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# Use project 'bare cpu' linker script and build elf-bigendian object file
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LFLAGS = -T../ion_noxram.lds -I elf32-big -eentry
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# For most simulations and demos we'll use these parameters
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# Pass BRAM sizes to VHDL conversion script
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# Set code to BRAM and use XRAM for data
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VHDL_FLAGS = --code_size $(CODE_SIZE) --data_size $(DATA_SIZE)
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# This will only work for small programs that fit the BRAM
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LFLAGS_BOOT = -Ttext $(CODE_BRAM_ADDRESS) -Tdata $(XRAM_ADDRESS) -eentry -I elf32-big
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# For some simulations we'll want to use TB1 which requires splitting code and
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# data. Use project 'bare cpu' linker script and build elf-bigendian objects.
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LFLAGS_BARE = -T../ion_noxram.lds -I elf32-big -eentry
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### Project directories ########################################################
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### Project directories ########################################################
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# VHDL test bench directory, where VHDL output files will be created
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# VHDL test bench directory, where VHDL output files will be created
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TB_DIR = ../../vhdl/tb
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TB_DIR = ../../vhdl/tb
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