xref: /openbmc/linux/arch/arm/Makefile (revision be7f8012)
1#
2# arch/arm/Makefile
3#
4# This file is included by the global makefile so that you can add your own
5# architecture-specific flags and dependencies.
6#
7# This file is subject to the terms and conditions of the GNU General Public
8# License.  See the file "COPYING" in the main directory of this archive
9# for more details.
10#
11# Copyright (C) 1995-2001 by Russell King
12
13LDFLAGS_vmlinux	:= --no-undefined -X --pic-veneer -z norelro
14ifeq ($(CONFIG_CPU_ENDIAN_BE8),y)
15LDFLAGS_vmlinux	+= --be8
16KBUILD_LDFLAGS_MODULE	+= --be8
17endif
18
19GZFLAGS		:=-9
20#KBUILD_CFLAGS	+=-pipe
21
22# Never generate .eh_frame
23KBUILD_CFLAGS	+= $(call cc-option,-fno-dwarf2-cfi-asm)
24
25# Disable FDPIC ABI
26KBUILD_CFLAGS	+= $(call cc-option,-mno-fdpic)
27
28# This should work on most of the modern platforms
29KBUILD_DEFCONFIG := multi_v7_defconfig
30
31# defines filename extension depending memory management type.
32ifeq ($(CONFIG_MMU),)
33MMUEXT		:= -nommu
34KBUILD_CFLAGS	+= $(call cc-option,-mno-unaligned-access)
35endif
36
37ifeq ($(CONFIG_FRAME_POINTER),y)
38KBUILD_CFLAGS	+=-fno-omit-frame-pointer
39ifeq ($(CONFIG_CC_IS_GCC),y)
40KBUILD_CFLAGS += -mapcs -mno-sched-prolog
41endif
42endif
43
44ifeq ($(CONFIG_CPU_BIG_ENDIAN),y)
45KBUILD_CPPFLAGS	+= -mbig-endian
46CHECKFLAGS	+= -D__ARMEB__
47KBUILD_LDFLAGS	+= -EB
48else
49KBUILD_CPPFLAGS	+= -mlittle-endian
50CHECKFLAGS	+= -D__ARMEL__
51KBUILD_LDFLAGS	+= -EL
52endif
53
54#
55# The Scalar Replacement of Aggregates (SRA) optimization pass in GCC 4.9 and
56# later may result in code being generated that handles signed short and signed
57# char struct members incorrectly. So disable it.
58# (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65932)
59#
60KBUILD_CFLAGS	+= $(call cc-option,-fno-ipa-sra)
61
62# This selects which instruction set is used.
63arch-$(CONFIG_CPU_32v7M)	:=-march=armv7-m
64arch-$(CONFIG_CPU_32v7)		:=-march=armv7-a
65arch-$(CONFIG_CPU_32v6)		:=-march=armv6
66# Only override the compiler option if ARMv6. The ARMv6K extensions are
67# always available in ARMv7
68ifeq ($(CONFIG_CPU_32v6),y)
69arch-$(CONFIG_CPU_32v6K)	:=-march=armv6k
70endif
71arch-$(CONFIG_CPU_32v5)		:=-march=armv5te
72arch-$(CONFIG_CPU_32v4T)	:=-march=armv4t
73arch-$(CONFIG_CPU_32v4)		:=-march=armv4
74arch-$(CONFIG_CPU_32v3)		:=-march=armv3m
75
76# Note that GCC does not numerically define an architecture version
77# macro, but instead defines a whole series of macros which makes
78# testing for a specific architecture or later rather impossible.
79cpp-$(CONFIG_CPU_32v7M)		:=-D__LINUX_ARM_ARCH__=7
80cpp-$(CONFIG_CPU_32v7)		:=-D__LINUX_ARM_ARCH__=7
81cpp-$(CONFIG_CPU_32v6)		:=-D__LINUX_ARM_ARCH__=6
82# Only override the compiler option if ARMv6. The ARMv6K extensions are
83# always available in ARMv7
84ifeq ($(CONFIG_CPU_32v6),y)
85cpp-$(CONFIG_CPU_32v6K)		:=-D__LINUX_ARM_ARCH__=6
86endif
87cpp-$(CONFIG_CPU_32v5)		:=-D__LINUX_ARM_ARCH__=5
88cpp-$(CONFIG_CPU_32v4T)		:=-D__LINUX_ARM_ARCH__=4
89cpp-$(CONFIG_CPU_32v4)		:=-D__LINUX_ARM_ARCH__=4
90cpp-$(CONFIG_CPU_32v3)		:=-D__LINUX_ARM_ARCH__=3
91
92# This selects how we optimise for the processor.
93tune-$(CONFIG_CPU_ARM7TDMI)	:=-mtune=arm7tdmi
94tune-$(CONFIG_CPU_ARM720T)	:=-mtune=arm7tdmi
95tune-$(CONFIG_CPU_ARM740T)	:=-mtune=arm7tdmi
96tune-$(CONFIG_CPU_ARM9TDMI)	:=-mtune=arm9tdmi
97tune-$(CONFIG_CPU_ARM940T)	:=-mtune=arm9tdmi
98tune-$(CONFIG_CPU_ARM946E)	:=-mtune=arm9e
99tune-$(CONFIG_CPU_ARM920T)	:=-mtune=arm9tdmi
100tune-$(CONFIG_CPU_ARM922T)	:=-mtune=arm9tdmi
101tune-$(CONFIG_CPU_ARM925T)	:=-mtune=arm9tdmi
102tune-$(CONFIG_CPU_ARM926T)	:=-mtune=arm9tdmi
103tune-$(CONFIG_CPU_FA526)	:=-mtune=arm9tdmi
104tune-$(CONFIG_CPU_SA110)	:=-mtune=strongarm110
105tune-$(CONFIG_CPU_SA1100)	:=-mtune=strongarm1100
106tune-$(CONFIG_CPU_XSCALE)	:=-mtune=xscale
107tune-$(CONFIG_CPU_XSC3)		:=-mtune=xscale
108tune-$(CONFIG_CPU_FEROCEON)	:=-mtune=xscale
109tune-$(CONFIG_CPU_V6)		:=-mtune=arm1136j-s
110tune-$(CONFIG_CPU_V6K)		:=-mtune=arm1136j-s
111
112ifeq ($(CONFIG_AEABI),y)
113CFLAGS_ABI	:=-mabi=aapcs-linux -mfpu=vfp
114else
115CFLAGS_ABI	:=$(call cc-option,-mapcs-32,-mabi=apcs-gnu) $(call cc-option,-mno-thumb-interwork,)
116endif
117
118ifeq ($(CONFIG_ARM_UNWIND),y)
119CFLAGS_ABI	+=-funwind-tables
120endif
121
122ifeq ($(CONFIG_CC_IS_CLANG),y)
123CFLAGS_ABI	+= -meabi gnu
124endif
125
126ifeq ($(CONFIG_CURRENT_POINTER_IN_TPIDRURO),y)
127KBUILD_CFLAGS	+= -mtp=cp15
128endif
129
130# Accept old syntax despite ".syntax unified"
131AFLAGS_NOWARN	:=$(call as-option,-Wa$(comma)-mno-warn-deprecated,-Wa$(comma)-W)
132
133ifeq ($(CONFIG_THUMB2_KERNEL),y)
134CFLAGS_ISA	:=-Wa,-mimplicit-it=always $(AFLAGS_NOWARN)
135AFLAGS_ISA	:=$(CFLAGS_ISA) -Wa$(comma)-mthumb
136CFLAGS_ISA	+=-mthumb
137else
138CFLAGS_ISA	:=$(call cc-option,-marm,) $(AFLAGS_NOWARN)
139AFLAGS_ISA	:=$(CFLAGS_ISA)
140endif
141
142# Need -Uarm for gcc < 3.x
143KBUILD_CPPFLAGS	+=$(cpp-y)
144KBUILD_CFLAGS	+=$(CFLAGS_ABI) $(CFLAGS_ISA) $(arch-y) $(tune-y) $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,)) -msoft-float -Uarm
145KBUILD_AFLAGS	+=$(CFLAGS_ABI) $(AFLAGS_ISA) -Wa,$(arch-y) $(tune-y) -include asm/unified.h -msoft-float
146
147CHECKFLAGS	+= -D__arm__
148
149# Text offset. This list is sorted numerically by address in order to
150# provide a means to avoid/resolve conflicts in multi-arch kernels.
151# Note: the 32kB below this value is reserved for use by the kernel
152# during boot, and this offset is critical to the functioning of
153# kexec-tools.
154textofs-y	:= 0x00008000
155# RTD1195 has Boot ROM at start of address space
156textofs-$(CONFIG_ARCH_REALTEK)  := 0x00108000
157# SA1111 DMA bug: we don't want the kernel to live in precious DMA-able memory
158ifeq ($(CONFIG_ARCH_SA1100),y)
159textofs-$(CONFIG_SA1111) := 0x00208000
160endif
161textofs-$(CONFIG_ARCH_IPQ40XX) := 0x00208000
162textofs-$(CONFIG_ARCH_MSM8X60) := 0x00208000
163textofs-$(CONFIG_ARCH_MSM8960) := 0x00208000
164textofs-$(CONFIG_ARCH_MESON) := 0x00208000
165textofs-$(CONFIG_ARCH_AXXIA) := 0x00308000
166
167# Machine directory name.  This list is sorted alphanumerically
168# by CONFIG_* macro name.
169machine-$(CONFIG_ARCH_ACTIONS)		+= actions
170machine-$(CONFIG_ARCH_AIROHA)		+= airoha
171machine-$(CONFIG_ARCH_ALPINE)		+= alpine
172machine-$(CONFIG_ARCH_ARTPEC)		+= artpec
173machine-$(CONFIG_ARCH_ASPEED)           += aspeed
174machine-$(CONFIG_ARCH_AT91)		+= at91
175machine-$(CONFIG_ARCH_AXXIA)		+= axxia
176machine-$(CONFIG_ARCH_BCM)		+= bcm
177machine-$(CONFIG_ARCH_BERLIN)		+= berlin
178machine-$(CONFIG_ARCH_CLPS711X)		+= clps711x
179machine-$(CONFIG_ARCH_DAVINCI)		+= davinci
180machine-$(CONFIG_ARCH_DIGICOLOR)	+= digicolor
181machine-$(CONFIG_ARCH_DOVE)		+= dove
182machine-$(CONFIG_ARCH_EP93XX)		+= ep93xx
183machine-$(CONFIG_ARCH_EXYNOS)		+= exynos
184machine-$(CONFIG_ARCH_FOOTBRIDGE)	+= footbridge
185machine-$(CONFIG_ARCH_GEMINI)		+= gemini
186machine-$(CONFIG_ARCH_HIGHBANK)		+= highbank
187machine-$(CONFIG_ARCH_HISI)		+= hisi
188machine-$(CONFIG_ARCH_HPE)		+= hpe
189machine-$(CONFIG_ARCH_IXP4XX)		+= ixp4xx
190machine-$(CONFIG_ARCH_KEYSTONE)		+= keystone
191machine-$(CONFIG_ARCH_LPC18XX)		+= lpc18xx
192machine-$(CONFIG_ARCH_LPC32XX)		+= lpc32xx
193machine-$(CONFIG_ARCH_MESON)		+= meson
194machine-$(CONFIG_ARCH_MMP)		+= mmp
195machine-$(CONFIG_ARCH_MOXART)		+= moxart
196machine-$(CONFIG_ARCH_MV78XX0)		+= mv78xx0
197machine-$(CONFIG_ARCH_MVEBU)		+= mvebu
198machine-$(CONFIG_ARCH_MXC)		+= imx
199machine-$(CONFIG_ARCH_MEDIATEK)		+= mediatek
200machine-$(CONFIG_ARCH_MILBEAUT)		+= milbeaut
201machine-$(CONFIG_ARCH_MXS)		+= mxs
202machine-$(CONFIG_ARCH_MSTARV7)		+= mstar
203machine-$(CONFIG_ARCH_NOMADIK)		+= nomadik
204machine-$(CONFIG_ARCH_NPCM)		+= npcm
205machine-$(CONFIG_ARCH_NSPIRE)		+= nspire
206machine-$(CONFIG_ARCH_OMAP1)		+= omap1
207machine-$(CONFIG_ARCH_OMAP2PLUS)	+= omap2
208machine-$(CONFIG_ARCH_ORION5X)		+= orion5x
209machine-$(CONFIG_ARCH_PXA)		+= pxa
210machine-$(CONFIG_ARCH_QCOM)		+= qcom
211machine-$(CONFIG_ARCH_REALTEK)		+= realtek
212machine-$(CONFIG_ARCH_ROCKCHIP)		+= rockchip
213machine-$(CONFIG_ARCH_RPC)		+= rpc
214machine-$(CONFIG_PLAT_SAMSUNG)		+= s3c
215machine-$(CONFIG_ARCH_S5PV210)		+= s5pv210
216machine-$(CONFIG_ARCH_SA1100)		+= sa1100
217machine-$(CONFIG_ARCH_RENESAS)	 	+= shmobile
218machine-$(CONFIG_ARCH_INTEL_SOCFPGA)	+= socfpga
219machine-$(CONFIG_ARCH_STI)		+= sti
220machine-$(CONFIG_ARCH_STM32)		+= stm32
221machine-$(CONFIG_ARCH_SUNPLUS)		+= sunplus
222machine-$(CONFIG_ARCH_SUNXI)		+= sunxi
223machine-$(CONFIG_ARCH_TEGRA)		+= tegra
224machine-$(CONFIG_ARCH_U8500)		+= ux500
225machine-$(CONFIG_ARCH_VT8500)		+= vt8500
226machine-$(CONFIG_ARCH_ZYNQ)		+= zynq
227machine-$(CONFIG_PLAT_VERSATILE)	+= versatile
228machine-$(CONFIG_PLAT_SPEAR)		+= spear
229
230# legacy platforms provide their own mach/*.h headers globally,
231# these three are mutually exclusive
232machdirs-$(CONFIG_ARCH_FOOTBRIDGE)	+= arch/arm/mach-footbridge
233machdirs-$(CONFIG_ARCH_RPC)		+= arch/arm/mach-rpc
234machdirs-$(CONFIG_ARCH_SA1100)		+= arch/arm/mach-sa1100
235KBUILD_CPPFLAGS += $(patsubst %,-I$(srctree)/%/include,$(machdirs-y))
236
237# The byte offset of the kernel image in RAM from the start of RAM.
238TEXT_OFFSET := $(textofs-y)
239
240export	TEXT_OFFSET GZFLAGS MMUEXT
241
242# If we have a machine-specific directory, then include it in the build.
243core-y				+= $(patsubst %,arch/arm/mach-%/,$(machine-y))
244# For cleaning
245core-				+= $(patsubst %,arch/arm/mach-%/,$(machine-))
246
247core-$(CONFIG_PLAT_ORION)	+= arch/arm/plat-orion/
248
249libs-y				:= arch/arm/lib/ $(libs-y)
250
251# Default target when executing plain make
252boot := arch/arm/boot
253ifeq ($(CONFIG_XIP_KERNEL),y)
254KBUILD_IMAGE := $(boot)/xipImage
255else
256KBUILD_IMAGE := $(boot)/zImage
257endif
258
259ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y)
260prepare: stack_protector_prepare
261ifeq ($(CONFIG_CC_HAVE_STACKPROTECTOR_TLS),y)
262stack_protector_prepare: prepare0
263	$(eval KBUILD_CFLAGS += \
264		-mstack-protector-guard=tls \
265		-mstack-protector-guard-offset=$(shell	\
266			awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}'\
267				include/generated/asm-offsets.h))
268else
269stack_protector_prepare: prepare0
270	$(eval SSP_PLUGIN_CFLAGS := \
271		-fplugin-arg-arm_ssp_per_task_plugin-offset=$(shell	\
272			awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}'\
273				include/generated/asm-offsets.h))
274	$(eval KBUILD_CFLAGS += $(SSP_PLUGIN_CFLAGS))
275	$(eval GCC_PLUGINS_CFLAGS += $(SSP_PLUGIN_CFLAGS))
276endif
277endif
278
279all:	$(notdir $(KBUILD_IMAGE))
280
281
282archheaders:
283	$(Q)$(MAKE) $(build)=arch/arm/tools uapi
284
285archprepare:
286	$(Q)$(MAKE) $(build)=arch/arm/tools kapi
287
288# Convert bzImage to zImage
289bzImage: zImage
290
291BOOT_TARGETS	= zImage Image xipImage bootpImage uImage
292INSTALL_TARGETS	= zinstall uinstall install
293
294PHONY += bzImage $(BOOT_TARGETS) $(INSTALL_TARGETS)
295
296bootpImage uImage: zImage
297zImage: Image
298
299$(BOOT_TARGETS): vmlinux
300	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
301	@$(kecho) '  Kernel: $(boot)/$@ is ready'
302
303$(INSTALL_TARGETS): KBUILD_IMAGE = $(boot)/$(patsubst %install,%Image,$@)
304$(INSTALL_TARGETS):
305	$(call cmd,install)
306
307PHONY += vdso_install
308vdso_install:
309ifeq ($(CONFIG_VDSO),y)
310	$(Q)$(MAKE) $(build)=arch/arm/vdso $@
311endif
312
313# My testing targets (bypasses dependencies)
314bp:;	$(Q)$(MAKE) $(build)=$(boot) $(boot)/bootpImage
315
316include $(srctree)/scripts/Makefile.defconf
317PHONY += multi_v7_lpae_defconfig
318multi_v7_lpae_defconfig:
319	$(call merge_into_defconfig,multi_v7_defconfig,lpae)
320
321define archhelp
322  echo  '* zImage        - Compressed kernel image (arch/$(ARCH)/boot/zImage)'
323  echo  '  Image         - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
324  echo  '* xipImage      - XIP kernel image, if configured (arch/$(ARCH)/boot/xipImage)'
325  echo  '  uImage        - U-Boot wrapped zImage'
326  echo  '  bootpImage    - Combined zImage and initial RAM disk'
327  echo  '                  (supply initrd image via make variable INITRD=<path>)'
328  echo  '  install       - Install uncompressed kernel'
329  echo  '  zinstall      - Install compressed kernel'
330  echo  '  uinstall      - Install U-Boot wrapped compressed kernel'
331  echo  '                  Install using (your) ~/bin/$(INSTALLKERNEL) or'
332  echo  '                  (distribution) /sbin/$(INSTALLKERNEL) or'
333  echo  '                  install to $$(INSTALL_PATH) and run lilo'
334  echo  '  vdso_install  - Install unstripped vdso.so to $$(INSTALL_MOD_PATH)/vdso'
335  echo
336  echo  '  multi_v7_lpae_defconfig     - multi_v7_defconfig with CONFIG_ARM_LPAE enabled'
337endef
338