1# SPDX-License-Identifier: GPL-2.0 2KBUILD_DEFCONFIG := mmu_defconfig 3 4UTS_SYSNAME = -DUTS_SYSNAME=\"Linux\" 5 6# What CPU version are we building for, and crack it open 7# as major.minor.rev 8CPU_VER := $(CONFIG_XILINX_MICROBLAZE0_HW_VER) 9CPU_MAJOR := $(word 1, $(subst ., , $(CPU_VER))) 10CPU_MINOR := $(word 2, $(subst ., , $(CPU_VER))) 11CPU_REV := $(word 3, $(subst ., , $(CPU_VER))) 12 13export CPU_VER CPU_MAJOR CPU_MINOR CPU_REV 14 15# Use cpu-related CONFIG_ vars to set compile options. 16# The various CONFIG_XILINX cpu features options are integers 0/1/2... 17# rather than bools y/n 18 19# Work out HW multipler support. This is tricky. 20# 1. Spartan2 has no HW multipliers. 21# 2. MicroBlaze v3.x always uses them, except in Spartan 2 22# 3. All other FPGa/CPU ver combos, we can trust the CONFIG_ settings 23ifeq (,$(findstring spartan2,$(CONFIG_XILINX_MICROBLAZE0_FAMILY))) 24 ifeq ($(CPU_MAJOR),3) 25 CPUFLAGS-1 += -mno-xl-soft-mul 26 else 27 # USE_HW_MUL can be 0, 1, or 2, defining a hierarchy of HW Mul support. 28 CPUFLAGS-$(subst 1,,$(CONFIG_XILINX_MICROBLAZE0_USE_HW_MUL)) += -mxl-multiply-high 29 CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_HW_MUL) += -mno-xl-soft-mul 30 endif 31endif 32CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_DIV) += -mno-xl-soft-div 33CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_BARREL) += -mxl-barrel-shift 34CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_PCMP_INSTR) += -mxl-pattern-compare 35 36ifdef CONFIG_CPU_BIG_ENDIAN 37KBUILD_CFLAGS += -mbig-endian 38KBUILD_AFLAGS += -mbig-endian 39KBUILD_LDFLAGS += -EB 40else 41KBUILD_CFLAGS += -mlittle-endian 42KBUILD_AFLAGS += -mlittle-endian 43KBUILD_LDFLAGS += -EL 44endif 45 46CPUFLAGS-1 += $(call cc-option,-mcpu=v$(CPU_VER)) 47 48# r31 holds current when in kernel mode 49KBUILD_CFLAGS += -ffixed-r31 $(CPUFLAGS-y) $(CPUFLAGS-1) $(CPUFLAGS-2) 50 51head-y := arch/microblaze/kernel/head.o 52libs-y += arch/microblaze/lib/ 53 54boot := arch/microblaze/boot 55 56# Are we making a simpleImage.<boardname> target? If so, crack out the boardname 57DTB:=$(subst simpleImage.,,$(filter simpleImage.%, $(MAKECMDGOALS))) 58 59export DTB 60 61all: linux.bin 62 63archheaders: 64 $(Q)$(MAKE) $(build)=arch/microblaze/kernel/syscalls all 65 66PHONY += linux.bin linux.bin.gz linux.bin.ub 67linux.bin.ub linux.bin.gz: linux.bin 68linux.bin: vmlinux 69linux.bin linux.bin.gz linux.bin.ub: 70 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 71 @echo 'Kernel: $(boot)/$@ is ready' ' (#'`cat .version`')' 72 73PHONY += simpleImage.$(DTB) 74simpleImage.$(DTB): vmlinux 75 $(Q)$(MAKE) $(build)=$(boot) $(addprefix $(boot)/$@., ub unstrip strip) 76 @echo 'Kernel: $(boot)/$@ is ready' ' (#'`cat .version`')' 77 78define archhelp 79 echo '* linux.bin - Create raw binary' 80 echo ' linux.bin.gz - Create compressed raw binary' 81 echo ' linux.bin.ub - Create U-Boot wrapped raw binary' 82 echo ' simpleImage.<dt> - Create the following images with <dt>.dtb linked in' 83 echo ' simpleImage.<dt> : raw image' 84 echo ' simpleImage.<dt>.ub : raw image with U-Boot header' 85 echo ' simpleImage.<dt>.unstrip: ELF (identical to vmlinux)' 86 echo ' simpleImage.<dt>.strip : stripped ELF' 87 echo ' Targets with <dt> embed a device tree blob inside the image' 88 echo ' These targets support board with firmware that does not' 89 echo ' support passing a device tree directly. Replace <dt> with the' 90 echo ' name of a dts file from the arch/microblaze/boot/dts/ directory' 91 echo ' (minus the .dts extension).' 92endef 93 94MRPROPER_FILES += $(boot)/simpleImage.* 95