projects/linux·blob master · refs

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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
133# The GCC option -ffreestanding is required in order to compile code containing
134# ARM/NEON intrinsics in a non C99-compliant environment (such as the kernel)
135CC_FLAGS_FPU := -ffreestanding
136# Enable <arm_neon.h>
137CC_FLAGS_FPU += -isystem $(shell $(CC) -print-file-name=include)
138CC_FLAGS_FPU += -march=armv7-a -mfloat-abi=softfp -mfpu=neon
139
140ifeq ($(CONFIG_THUMB2_KERNEL),y)
141CFLAGS_ISA :=-Wa,-mimplicit-it=always $(AFLAGS_NOWARN)
142AFLAGS_ISA :=$(CFLAGS_ISA) -Wa$(comma)-mthumb
143CFLAGS_ISA +=-mthumb
144else
145CFLAGS_ISA :=$(call cc-option,-marm,) $(AFLAGS_NOWARN)
146AFLAGS_ISA :=$(CFLAGS_ISA)
147endif
148
149# Need -Uarm for gcc < 3.x
150KBUILD_CPPFLAGS +=$(cpp-y)
151KBUILD_CFLAGS +=$(CFLAGS_ABI) $(CFLAGS_ISA) $(arch-y) $(tune-y) $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,)) -msoft-float -Uarm
152KBUILD_AFLAGS +=$(CFLAGS_ABI) $(AFLAGS_ISA) -Wa,$(arch-y) $(tune-y) -include $(srctree)/arch/arm/include/asm/unified.h -msoft-float
153KBUILD_RUSTFLAGS += --target=arm-unknown-linux-gnueabi
154
155CHECKFLAGS += -D__arm__
156
157# Text offset. This list is sorted numerically by address in order to
158# provide a means to avoid/resolve conflicts in multi-arch kernels.
159# Note: the 32kB below this value is reserved for use by the kernel
160# during boot, and this offset is critical to the functioning of
161# kexec-tools.
162textofs-y := 0x00008000
163# RTD1195 has Boot ROM at start of address space
164textofs-$(CONFIG_ARCH_REALTEK) := 0x00108000
165# SA1111 DMA bug: we don't want the kernel to live in precious DMA-able memory
166ifeq ($(CONFIG_ARCH_SA1100),y)
167textofs-$(CONFIG_SA1111) := 0x00208000
168endif
169textofs-$(CONFIG_ARCH_QCOM_RESERVE_SMEM) := 0x00208000
170textofs-$(CONFIG_ARCH_MESON) := 0x00208000
171textofs-$(CONFIG_ARCH_AXXIA) := 0x00308000
172
173# Machine directory name. This list is sorted alphanumerically
174# by CONFIG_* macro name.
175machine-$(CONFIG_ARCH_ACTIONS) += actions
176machine-$(CONFIG_ARCH_ALPINE) += alpine
177machine-$(CONFIG_ARCH_ARTPEC) += artpec
178machine-$(CONFIG_ARCH_ASPEED) += aspeed
179machine-$(CONFIG_ARCH_AT91) += at91
180machine-$(CONFIG_ARCH_AXXIA) += axxia
181machine-$(CONFIG_ARCH_BCM) += bcm
182machine-$(CONFIG_ARCH_BERLIN) += berlin
183machine-$(CONFIG_ARCH_CLPS711X) += clps711x
184machine-$(CONFIG_ARCH_DAVINCI) += davinci
185machine-$(CONFIG_ARCH_DIGICOLOR) += digicolor
186machine-$(CONFIG_ARCH_DOVE) += dove
187machine-$(CONFIG_ARCH_EXYNOS) += exynos
188machine-$(CONFIG_ARCH_FOOTBRIDGE) += footbridge
189machine-$(CONFIG_ARCH_GEMINI) += gemini
190machine-$(CONFIG_ARCH_HIGHBANK) += highbank
191machine-$(CONFIG_ARCH_HISI) += hisi
192machine-$(CONFIG_ARCH_IXP4XX) += ixp4xx
193machine-$(CONFIG_ARCH_KEYSTONE) += keystone
194machine-$(CONFIG_ARCH_LPC18XX) += lpc18xx
195machine-$(CONFIG_ARCH_LPC32XX) += lpc32xx
196machine-$(CONFIG_ARCH_MESON) += meson
197machine-$(CONFIG_ARCH_MMP) += mmp
198machine-$(CONFIG_ARCH_MV78XX0) += mv78xx0
199machine-$(CONFIG_ARCH_MVEBU) += mvebu
200machine-$(CONFIG_ARCH_MXC) += imx
201machine-$(CONFIG_ARCH_MEDIATEK) += mediatek
202machine-$(CONFIG_ARCH_MILBEAUT) += milbeaut
203machine-$(CONFIG_ARCH_MXS) += mxs
204machine-$(CONFIG_ARCH_MSTARV7) += mstar
205machine-$(CONFIG_ARCH_NOMADIK) += nomadik
206machine-$(CONFIG_ARCH_NPCM) += npcm
207machine-$(CONFIG_ARCH_OMAP1) += omap1
208machine-$(CONFIG_ARCH_OMAP2PLUS) += omap2
209machine-$(CONFIG_ARCH_ORION5X) += orion5x
210machine-$(CONFIG_ARCH_PXA) += pxa
211machine-$(CONFIG_ARCH_QCOM) += qcom
212machine-$(CONFIG_ARCH_REALTEK) += realtek
213machine-$(CONFIG_ARCH_ROCKCHIP) += rockchip
214machine-$(CONFIG_ARCH_RPC) += rpc
215machine-$(CONFIG_PLAT_SAMSUNG) += s3c
216machine-$(CONFIG_ARCH_S5PV210) += s5pv210
217machine-$(CONFIG_ARCH_SA1100) += sa1100
218machine-$(CONFIG_ARCH_RENESAS) += shmobile
219machine-$(CONFIG_ARCH_INTEL_SOCFPGA) += socfpga
220machine-$(CONFIG_ARCH_STI) += sti
221machine-$(CONFIG_ARCH_STM32) += stm32
222machine-$(CONFIG_ARCH_SUNXI) += sunxi
223machine-$(CONFIG_ARCH_TEGRA) += tegra
224machine-$(CONFIG_ARCH_U8500) += ux500
225machine-$(CONFIG_ARCH_VT8500) += vt8500
226machine-$(CONFIG_ARCH_ZTE) += zte
227machine-$(CONFIG_ARCH_ZYNQ) += zynq
228machine-$(CONFIG_PLAT_VERSATILE) += versatile
229machine-$(CONFIG_PLAT_SPEAR) += spear
230
231# legacy platforms provide their own mach/*.h headers globally,
232# these three are mutually exclusive
233machdirs-$(CONFIG_ARCH_FOOTBRIDGE) += arch/arm/mach-footbridge
234machdirs-$(CONFIG_ARCH_RPC) += arch/arm/mach-rpc
235machdirs-$(CONFIG_ARCH_SA1100) += arch/arm/mach-sa1100
236KBUILD_CPPFLAGS += $(patsubst %,-I$(srctree)/%/include,$(machdirs-y))
237
238# The byte offset of the kernel image in RAM from the start of RAM.
239TEXT_OFFSET := $(textofs-y)
240
241export TEXT_OFFSET GZFLAGS MMUEXT
242
243# If we have a machine-specific directory, then include it in the build.
244core-y += $(patsubst %,arch/arm/mach-%/,$(machine-y))
245# For cleaning
246core- += $(patsubst %,arch/arm/mach-%/,$(machine-))
247
248core-$(CONFIG_PLAT_ORION) += arch/arm/plat-orion/
249
250libs-y := arch/arm/lib/ $(libs-y)
251
252# Default target when executing plain make
253boot := arch/arm/boot
254ifeq ($(CONFIG_XIP_KERNEL),y)
255KBUILD_IMAGE := $(boot)/xipImage
256else
257KBUILD_IMAGE := $(boot)/zImage
258endif
259
260ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y)
261prepare: stack_protector_prepare
262ifeq ($(CONFIG_CC_HAVE_STACKPROTECTOR_TLS),y)
263stack_protector_prepare: prepare0
264 $(eval KBUILD_CFLAGS += \
265 -mstack-protector-guard=tls \
266 -mstack-protector-guard-offset=$(shell \
267 awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}'\
268 $(objtree)/include/generated/asm-offsets.h))
269else
270stack_protector_prepare: prepare0
271 $(eval SSP_PLUGIN_CFLAGS := \
272 -fplugin-arg-arm_ssp_per_task_plugin-offset=$(shell \
273 awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}'\
274 $(objtree)/include/generated/asm-offsets.h))
275 $(eval KBUILD_CFLAGS += $(SSP_PLUGIN_CFLAGS))
276 $(eval GCC_PLUGINS_CFLAGS += $(SSP_PLUGIN_CFLAGS))
277endif
278endif
279
280all: $(notdir $(KBUILD_IMAGE))
281
282
283archheaders:
284 $(Q)$(MAKE) $(build)=arch/arm/tools uapi
285
286archprepare:
287 $(Q)$(MAKE) $(build)=arch/arm/tools kapi
288
289# Convert bzImage to zImage
290bzImage: zImage
291
292BOOT_TARGETS = zImage Image xipImage bootpImage uImage
293INSTALL_TARGETS = zinstall uinstall install
294
295PHONY += bzImage $(BOOT_TARGETS) $(INSTALL_TARGETS)
296
297bootpImage uImage: zImage
298zImage: Image
299
300$(BOOT_TARGETS): vmlinux
301 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
302 @$(kecho) ' Kernel: $(boot)/$@ is ready'
303
304$(INSTALL_TARGETS): KBUILD_IMAGE = $(boot)/$(patsubst %install,%Image,$@)
305$(INSTALL_TARGETS):
306 $(call cmd,install)
307
308vdso-install-$(CONFIG_VDSO) += arch/arm/vdso/vdso.so.dbg
309
310# My testing targets (bypasses dependencies)
311bp:; $(Q)$(MAKE) $(build)=$(boot) $(boot)/bootpImage
312
313include $(srctree)/scripts/Makefile.defconf
314PHONY += multi_v7_lpae_defconfig
315multi_v7_lpae_defconfig:
316 $(call merge_into_defconfig,multi_v7_defconfig,lpae)
317
318define archhelp
319 echo '* zImage - Compressed kernel image (arch/$(ARCH)/boot/zImage)'
320 echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
321 echo '* xipImage - XIP kernel image, if configured (arch/$(ARCH)/boot/xipImage)'
322 echo ' uImage - U-Boot wrapped zImage'
323 echo ' bootpImage - Combined zImage and initial RAM disk'
324 echo ' (supply initrd image via make variable INITRD=<path>)'
325 echo ' install - Install uncompressed kernel'
326 echo ' zinstall - Install compressed kernel'
327 echo ' uinstall - Install U-Boot wrapped compressed kernel'
328 echo ' Install using (your) ~/bin/$(INSTALLKERNEL) or'
329 echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
330 echo ' install to $$(INSTALL_PATH) and run lilo'
331 echo
332 echo ' multi_v7_lpae_defconfig - multi_v7_defconfig with CONFIG_ARM_LPAE enabled'
333endef