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