4 # This file is included by the global makefile so that you can add your own
5 # architecture-specific flags and dependencies.
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
11 # Copyright (C) 1995-2001 by Russell King
13 LDFLAGS_vmlinux := --no-undefined -X --pic-veneer
14 ifeq ($(CONFIG_CPU_ENDIAN_BE8),y)
15 LDFLAGS_vmlinux += --be8
16 KBUILD_LDFLAGS_MODULE += --be8
19 # We never want expected sections to be placed heuristically by the
20 # linker. All sections should be explicitly named in the linker script.
21 LDFLAGS_vmlinux += $(call ld-option, --orphan-handling=warn)
23 ifeq ($(CONFIG_ARM_MODULE_PLTS),y)
24 KBUILD_LDS_MODULE += $(srctree)/arch/arm/kernel/module.lds
28 #KBUILD_CFLAGS +=-pipe
30 # Never generate .eh_frame
31 KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
33 # This should work on most of the modern platforms
34 KBUILD_DEFCONFIG := multi_v7_defconfig
36 # defines filename extension depending memory management type.
39 KBUILD_CFLAGS += $(call cc-option,-mno-unaligned-access)
42 ifeq ($(CONFIG_FRAME_POINTER),y)
43 KBUILD_CFLAGS +=-fno-omit-frame-pointer
44 ifeq ($(CONFIG_CC_IS_GCC),y)
45 KBUILD_CFLAGS += -mapcs -mno-sched-prolog
49 ifeq ($(CONFIG_CPU_BIG_ENDIAN),y)
50 KBUILD_CPPFLAGS += -mbig-endian
51 CHECKFLAGS += -D__ARMEB__
54 KBUILD_CPPFLAGS += -mlittle-endian
55 CHECKFLAGS += -D__ARMEL__
60 # The Scalar Replacement of Aggregates (SRA) optimization pass in GCC 4.9 and
61 # later may result in code being generated that handles signed short and signed
62 # char struct members incorrectly. So disable it.
63 # (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65932)
65 KBUILD_CFLAGS += $(call cc-option,-fno-ipa-sra)
67 # This selects which instruction set is used.
68 # Note that GCC does not numerically define an architecture version
69 # macro, but instead defines a whole series of macros which makes
70 # testing for a specific architecture or later rather impossible.
71 arch-$(CONFIG_CPU_32v7M) =-D__LINUX_ARM_ARCH__=7 -march=armv7-m -Wa,-march=armv7-m
72 arch-$(CONFIG_CPU_32v7) =-D__LINUX_ARM_ARCH__=7 $(call cc-option,-march=armv7-a,-march=armv5t -Wa$(comma)-march=armv7-a)
73 arch-$(CONFIG_CPU_32v6) =-D__LINUX_ARM_ARCH__=6 $(call cc-option,-march=armv6,-march=armv5t -Wa$(comma)-march=armv6)
74 # Only override the compiler option if ARMv6. The ARMv6K extensions are
75 # always available in ARMv7
76 ifeq ($(CONFIG_CPU_32v6),y)
77 arch-$(CONFIG_CPU_32v6K) =-D__LINUX_ARM_ARCH__=6 $(call cc-option,-march=armv6k,-march=armv5t -Wa$(comma)-march=armv6k)
79 arch-$(CONFIG_CPU_32v5) =-D__LINUX_ARM_ARCH__=5 $(call cc-option,-march=armv5te,-march=armv4t)
80 arch-$(CONFIG_CPU_32v4T) =-D__LINUX_ARM_ARCH__=4 -march=armv4t
81 arch-$(CONFIG_CPU_32v4) =-D__LINUX_ARM_ARCH__=4 -march=armv4
82 arch-$(CONFIG_CPU_32v3) =-D__LINUX_ARM_ARCH__=3 -march=armv3m
84 # Evaluate arch cc-option calls now
87 # This selects how we optimise for the processor.
88 tune-$(CONFIG_CPU_ARM7TDMI) =-mtune=arm7tdmi
89 tune-$(CONFIG_CPU_ARM720T) =-mtune=arm7tdmi
90 tune-$(CONFIG_CPU_ARM740T) =-mtune=arm7tdmi
91 tune-$(CONFIG_CPU_ARM9TDMI) =-mtune=arm9tdmi
92 tune-$(CONFIG_CPU_ARM940T) =-mtune=arm9tdmi
93 tune-$(CONFIG_CPU_ARM946E) =$(call cc-option,-mtune=arm9e,-mtune=arm9tdmi)
94 tune-$(CONFIG_CPU_ARM920T) =-mtune=arm9tdmi
95 tune-$(CONFIG_CPU_ARM922T) =-mtune=arm9tdmi
96 tune-$(CONFIG_CPU_ARM925T) =-mtune=arm9tdmi
97 tune-$(CONFIG_CPU_ARM926T) =-mtune=arm9tdmi
98 tune-$(CONFIG_CPU_FA526) =-mtune=arm9tdmi
99 tune-$(CONFIG_CPU_SA110) =-mtune=strongarm110
100 tune-$(CONFIG_CPU_SA1100) =-mtune=strongarm1100
101 tune-$(CONFIG_CPU_XSCALE) =$(call cc-option,-mtune=xscale,-mtune=strongarm110) -Wa,-mcpu=xscale
102 tune-$(CONFIG_CPU_XSC3) =$(call cc-option,-mtune=xscale,-mtune=strongarm110) -Wa,-mcpu=xscale
103 tune-$(CONFIG_CPU_FEROCEON) =$(call cc-option,-mtune=marvell-f,-mtune=xscale)
104 tune-$(CONFIG_CPU_V6) =$(call cc-option,-mtune=arm1136j-s,-mtune=strongarm)
105 tune-$(CONFIG_CPU_V6K) =$(call cc-option,-mtune=arm1136j-s,-mtune=strongarm)
107 # Evaluate tune cc-option calls now
110 ifeq ($(CONFIG_AEABI),y)
111 CFLAGS_ABI :=-mabi=aapcs-linux -mfpu=vfp
113 CFLAGS_ABI :=$(call cc-option,-mapcs-32,-mabi=apcs-gnu) $(call cc-option,-mno-thumb-interwork,)
116 ifeq ($(CONFIG_ARM_UNWIND),y)
117 CFLAGS_ABI +=-funwind-tables
120 ifeq ($(CONFIG_CC_IS_CLANG),y)
121 CFLAGS_ABI += -meabi gnu
124 # Accept old syntax despite ".syntax unified"
125 AFLAGS_NOWARN :=$(call as-option,-Wa$(comma)-mno-warn-deprecated,-Wa$(comma)-W)
127 ifeq ($(CONFIG_THUMB2_KERNEL),y)
128 CFLAGS_ISA :=-mthumb -Wa,-mimplicit-it=always $(AFLAGS_NOWARN)
129 AFLAGS_ISA :=$(CFLAGS_ISA) -Wa$(comma)-mthumb
131 CFLAGS_ISA :=$(call cc-option,-marm,) $(AFLAGS_NOWARN)
132 AFLAGS_ISA :=$(CFLAGS_ISA)
135 # Need -Uarm for gcc < 3.x
136 KBUILD_CFLAGS +=$(CFLAGS_ABI) $(CFLAGS_ISA) $(arch-y) $(tune-y) $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,)) -msoft-float -Uarm
137 KBUILD_AFLAGS +=$(CFLAGS_ABI) $(AFLAGS_ISA) $(arch-y) $(tune-y) -include asm/unified.h -msoft-float
139 CHECKFLAGS += -D__arm__
142 head-y := arch/arm/kernel/head$(MMUEXT).o
144 # Text offset. This list is sorted numerically by address in order to
145 # provide a means to avoid/resolve conflicts in multi-arch kernels.
146 textofs-y := 0x00008000
147 # We don't want the htc bootloader to corrupt kernel during resume
148 textofs-$(CONFIG_PM_H1940) := 0x00108000
149 # RTD1195 has Boot ROM at start of address space
150 textofs-$(CONFIG_ARCH_REALTEK) := 0x00108000
151 # SA1111 DMA bug: we don't want the kernel to live in precious DMA-able memory
152 ifeq ($(CONFIG_ARCH_SA1100),y)
153 textofs-$(CONFIG_SA1111) := 0x00208000
155 textofs-$(CONFIG_ARCH_IPQ40XX) := 0x00208000
156 textofs-$(CONFIG_ARCH_MSM8X60) := 0x00208000
157 textofs-$(CONFIG_ARCH_MSM8960) := 0x00208000
158 textofs-$(CONFIG_ARCH_MESON) := 0x00208000
159 textofs-$(CONFIG_ARCH_AXXIA) := 0x00308000
161 # Machine directory name. This list is sorted alphanumerically
162 # by CONFIG_* macro name.
163 machine-$(CONFIG_ARCH_ACTIONS) += actions
164 machine-$(CONFIG_ARCH_ALPINE) += alpine
165 machine-$(CONFIG_ARCH_ARTPEC) += artpec
166 machine-$(CONFIG_ARCH_ASPEED) += aspeed
167 machine-$(CONFIG_ARCH_AT91) += at91
168 machine-$(CONFIG_ARCH_AXXIA) += axxia
169 machine-$(CONFIG_ARCH_BCM) += bcm
170 machine-$(CONFIG_ARCH_BERLIN) += berlin
171 machine-$(CONFIG_ARCH_CLPS711X) += clps711x
172 machine-$(CONFIG_ARCH_CNS3XXX) += cns3xxx
173 machine-$(CONFIG_ARCH_DAVINCI) += davinci
174 machine-$(CONFIG_ARCH_DIGICOLOR) += digicolor
175 machine-$(CONFIG_ARCH_DOVE) += dove
176 machine-$(CONFIG_ARCH_EBSA110) += ebsa110
177 machine-$(CONFIG_ARCH_EFM32) += efm32
178 machine-$(CONFIG_ARCH_EP93XX) += ep93xx
179 machine-$(CONFIG_ARCH_EXYNOS) += exynos
180 machine-$(CONFIG_ARCH_FOOTBRIDGE) += footbridge
181 machine-$(CONFIG_ARCH_GEMINI) += gemini
182 machine-$(CONFIG_ARCH_HIGHBANK) += highbank
183 machine-$(CONFIG_ARCH_HISI) += hisi
184 machine-$(CONFIG_ARCH_INTEGRATOR) += integrator
185 machine-$(CONFIG_ARCH_IOP32X) += iop32x
186 machine-$(CONFIG_ARCH_IXP4XX) += ixp4xx
187 machine-$(CONFIG_ARCH_KEYSTONE) += keystone
188 machine-$(CONFIG_ARCH_LPC18XX) += lpc18xx
189 machine-$(CONFIG_ARCH_LPC32XX) += lpc32xx
190 machine-$(CONFIG_ARCH_MESON) += meson
191 machine-$(CONFIG_ARCH_MMP) += mmp
192 machine-$(CONFIG_ARCH_MPS2) += vexpress
193 machine-$(CONFIG_ARCH_MOXART) += moxart
194 machine-$(CONFIG_ARCH_MV78XX0) += mv78xx0
195 machine-$(CONFIG_ARCH_MVEBU) += mvebu
196 machine-$(CONFIG_ARCH_MXC) += imx
197 machine-$(CONFIG_ARCH_MEDIATEK) += mediatek
198 machine-$(CONFIG_ARCH_MILBEAUT) += milbeaut
199 machine-$(CONFIG_ARCH_MXS) += mxs
200 machine-$(CONFIG_ARCH_MSTARV7) += mstar
201 machine-$(CONFIG_ARCH_NOMADIK) += nomadik
202 machine-$(CONFIG_ARCH_NPCM) += npcm
203 machine-$(CONFIG_ARCH_NSPIRE) += nspire
204 machine-$(CONFIG_ARCH_OXNAS) += oxnas
205 machine-$(CONFIG_ARCH_OMAP1) += omap1
206 machine-$(CONFIG_ARCH_OMAP2PLUS) += omap2
207 machine-$(CONFIG_ARCH_ORION5X) += orion5x
208 machine-$(CONFIG_ARCH_PICOXCELL) += picoxcell
209 machine-$(CONFIG_ARCH_PXA) += pxa
210 machine-$(CONFIG_ARCH_QCOM) += qcom
211 machine-$(CONFIG_ARCH_RDA) += rda
212 machine-$(CONFIG_ARCH_REALTEK) += realtek
213 machine-$(CONFIG_ARCH_REALVIEW) += realview
214 machine-$(CONFIG_ARCH_ROCKCHIP) += rockchip
215 machine-$(CONFIG_ARCH_RPC) += rpc
216 machine-$(CONFIG_ARCH_S3C24XX) += s3c24xx
217 machine-$(CONFIG_ARCH_S3C64XX) += s3c64xx
218 machine-$(CONFIG_ARCH_S5PV210) += s5pv210
219 machine-$(CONFIG_ARCH_SA1100) += sa1100
220 machine-$(CONFIG_ARCH_RENESAS) += shmobile
221 machine-$(CONFIG_ARCH_SIRF) += prima2
222 machine-$(CONFIG_ARCH_SOCFPGA) += socfpga
223 machine-$(CONFIG_ARCH_STI) += sti
224 machine-$(CONFIG_ARCH_STM32) += stm32
225 machine-$(CONFIG_ARCH_SUNXI) += sunxi
226 machine-$(CONFIG_ARCH_TANGO) += tango
227 machine-$(CONFIG_ARCH_TEGRA) += tegra
228 machine-$(CONFIG_ARCH_U300) += u300
229 machine-$(CONFIG_ARCH_U8500) += ux500
230 machine-$(CONFIG_ARCH_VERSATILE) += versatile
231 machine-$(CONFIG_ARCH_VEXPRESS) += vexpress
232 machine-$(CONFIG_ARCH_VT8500) += vt8500
233 machine-$(CONFIG_ARCH_ZX) += zx
234 machine-$(CONFIG_ARCH_ZYNQ) += zynq
235 machine-$(CONFIG_PLAT_SPEAR) += spear
237 # Platform directory name. This list is sorted alphanumerically
238 # by CONFIG_* macro name.
239 plat-$(CONFIG_ARCH_EXYNOS) += samsung
240 plat-$(CONFIG_ARCH_OMAP) += omap
241 plat-$(CONFIG_ARCH_S3C64XX) += samsung
242 plat-$(CONFIG_ARCH_S5PV210) += samsung
243 plat-$(CONFIG_PLAT_ORION) += orion
244 plat-$(CONFIG_PLAT_PXA) += pxa
245 plat-$(CONFIG_PLAT_S3C24XX) += samsung
246 plat-$(CONFIG_PLAT_VERSATILE) += versatile
248 ifeq ($(CONFIG_ARCH_EBSA110),y)
249 # This is what happens if you forget the IOCS16 line.
250 # PCMCIA cards stop working.
251 CFLAGS_3c589_cs.o :=-DISA_SIXTEEN_BIT_PERIPHERAL
252 export CFLAGS_3c589_cs.o
255 # The byte offset of the kernel image in RAM from the start of RAM.
256 TEXT_OFFSET := $(textofs-y)
258 # The first directory contains additional information for the boot setup code
259 ifneq ($(machine-y),)
260 MACHINE := arch/arm/mach-$(word 1,$(machine-y))/
264 ifeq ($(CONFIG_ARCH_MULTIPLATFORM),y)
268 machdirs := $(patsubst %,arch/arm/mach-%/,$(machine-y))
269 platdirs := $(patsubst %,arch/arm/plat-%/,$(sort $(plat-y)))
271 ifneq ($(CONFIG_ARCH_MULTIPLATFORM),y)
272 ifneq ($(CONFIG_ARM_SINGLE_ARMV7M),y)
273 KBUILD_CPPFLAGS += $(patsubst %,-I$(srctree)/%include,$(machdirs) $(platdirs))
277 export TEXT_OFFSET GZFLAGS MMUEXT
280 # If we have a machine-specific directory, then include it in the build.
281 core-y += $(machdirs) $(platdirs)
284 core- += $(patsubst %,arch/arm/mach-%/, $(machine-))
285 core- += $(patsubst %,arch/arm/plat-%/, $(plat-))
287 drivers-$(CONFIG_OPROFILE) += arch/arm/oprofile/
289 libs-y := arch/arm/lib/ $(libs-y)
291 # Default target when executing plain make
292 boot := arch/arm/boot
293 ifeq ($(CONFIG_XIP_KERNEL),y)
294 KBUILD_IMAGE := $(boot)/xipImage
296 KBUILD_IMAGE := $(boot)/zImage
299 ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y)
300 prepare: stack_protector_prepare
301 stack_protector_prepare: prepare0
302 $(eval SSP_PLUGIN_CFLAGS := \
303 -fplugin-arg-arm_ssp_per_task_plugin-tso=$(shell \
304 awk '{if ($$2 == "THREAD_SZ_ORDER") print $$3;}'\
305 include/generated/asm-offsets.h) \
306 -fplugin-arg-arm_ssp_per_task_plugin-offset=$(shell \
307 awk '{if ($$2 == "TI_STACK_CANARY") print $$3;}'\
308 include/generated/asm-offsets.h))
309 $(eval KBUILD_CFLAGS += $(SSP_PLUGIN_CFLAGS))
310 $(eval GCC_PLUGINS_CFLAGS += $(SSP_PLUGIN_CFLAGS))
313 all: $(notdir $(KBUILD_IMAGE))
317 $(Q)$(MAKE) $(build)=arch/arm/tools uapi
320 $(Q)$(MAKE) $(build)=arch/arm/tools kapi
322 # Convert bzImage to zImage
325 BOOT_TARGETS = zImage Image xipImage bootpImage uImage
326 INSTALL_TARGETS = zinstall uinstall install
328 PHONY += bzImage $(BOOT_TARGETS) $(INSTALL_TARGETS)
330 bootpImage uImage: zImage
333 $(BOOT_TARGETS): vmlinux
334 $(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/$@
335 @$(kecho) ' Kernel: $(boot)/$@ is ready'
338 $(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $@
340 PHONY += vdso_install
342 ifeq ($(CONFIG_VDSO),y)
343 $(Q)$(MAKE) $(build)=arch/arm/vdso $@
346 # We use MRPROPER_FILES and CLEAN_FILES now
348 $(Q)$(MAKE) $(clean)=$(boot)
350 # My testing targets (bypasses dependencies)
351 bp:; $(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/bootpImage
355 echo '* zImage - Compressed kernel image (arch/$(ARCH)/boot/zImage)'
356 echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
357 echo '* xipImage - XIP kernel image, if configured (arch/$(ARCH)/boot/xipImage)'
358 echo ' uImage - U-Boot wrapped zImage'
359 echo ' bootpImage - Combined zImage and initial RAM disk'
360 echo ' (supply initrd image via make variable INITRD=<path>)'
361 echo ' install - Install uncompressed kernel'
362 echo ' zinstall - Install compressed kernel'
363 echo ' uinstall - Install U-Boot wrapped compressed kernel'
364 echo ' Install using (your) ~/bin/$(INSTALLKERNEL) or'
365 echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
366 echo ' install to $$(INSTALL_PATH) and run lilo'
367 echo ' vdso_install - Install unstripped vdso.so to $$(INSTALL_MOD_PATH)/vdso'