1UTS_SYSNAME = -DUTS_SYSNAME=\"uClinux\" 2 3# What CPU vesion are we building for, and crack it open 4# as major.minor.rev 5CPU_VER=$(subst ",,$(CONFIG_XILINX_MICROBLAZE0_HW_VER) ) 6CPU_MAJOR=$(shell echo $(CPU_VER) | cut -d '.' -f 1) 7CPU_MINOR=$(shell echo $(CPU_VER) | cut -d '.' -f 2) 8CPU_REV=$(shell echo $(CPU_VER) | cut -d '.' -f 3) 9 10export CPU_VER CPU_MAJOR CPU_MINOR CPU_REV 11 12# Use cpu-related CONFIG_ vars to set compile options. 13 14# Work out HW multipler support. This is icky. 15# 1. Spartan2 has no HW multiplers. 16# 2. MicroBlaze v3.x always uses them, except in Spartan 2 17# 3. All other FPGa/CPU ver combos, we can trust the CONFIG_ settings 18ifeq (,$(findstring spartan2,$(CONFIG_XILINX_MICROBLAZE0_FAMILY))) 19 ifeq ($(CPU_MAJOR),3) 20 CPUFLAGS-1 += -mno-xl-soft-mul 21 else 22 # USE_HW_MUL can be 0, 1, or 2, defining a heirarchy of HW Mul support. 23 CPUFLAGS-$(subst 1,,$(CONFIG_XILINX_MICROBLAZE0_USE_HW_MUL)) += -mxl-multiply-high 24 CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_HW_MUL) += -mno-xl-soft-mul 25 endif 26endif 27CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_DIV) += -mno-xl-soft-div 28CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_BARREL) += -mxl-barrel-shift 29CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_PCMP_INSTR) += -mxl-pattern-compare 30 31CPUFLAGS-1 += $(call cc-option,-mcpu=v$(CPU_VER)) 32 33# The various CONFIG_XILINX cpu features options are integers 0/1/2... 34# rather than bools y/n 35CFLAGS += $(CPUFLAGS-1) 36CFLAGS += $(CPUFLAGS-2) 37 38# r31 holds current when in kernel mode 39CFLAGS += -ffixed-r31 40 41LDFLAGS_BLOB := --format binary --oformat elf32-microblaze 42 43LIBGCC := $(shell $(CC) $(CFLAGS) -print-libgcc-file-name) 44 45head-y := arch/microblaze/kernel/head.o 46libs-y += arch/microblaze/lib/ $(LIBGCC) 47core-y += arch/microblaze/kernel/ arch/microblaze/mm/ \ 48 arch/microblaze/platform/ 49 50boot := arch/$(ARCH)/boot 51 52# defines filename extension depending memory management type 53ifeq ($(CONFIG_MMU),) 54MMUEXT := -nommu 55endif 56export MMUEXT 57 58all: linux.bin 59 60archclean: 61 $(Q)$(MAKE) $(clean)=$(boot) 62 63linux.bin linux.bin.gz: vmlinux 64 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 65 66define archhelp 67 echo '* linux.bin - Create raw binary' 68 echo ' linux.bin.gz - Create compressed raw binary' 69endef 70