xref: /openbmc/linux/arch/microblaze/Makefile (revision aa74c44b) 
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