tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
14ifeq ($(CONFIG_CPU_ENDIAN_BE8),y)
15LDFLAGS_vmlinux += --be8
16KBUILD_LDFLAGS_MODULE += --be8
17endif
18
19ifeq ($(CONFIG_ARM_MODULE_PLTS),y)
20KBUILD_LDS_MODULE += $(srctree)/arch/arm/kernel/module.lds
21endif
22
23GZFLAGS :=-9
24#KBUILD_CFLAGS +=-pipe
25
26# Never generate .eh_frame
27KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
28
29# This should work on most of the modern platforms
30KBUILD_DEFCONFIG := multi_v7_defconfig
31
32# defines filename extension depending memory management type.
33ifeq ($(CONFIG_MMU),)
34MMUEXT := -nommu
35KBUILD_CFLAGS += $(call cc-option,-mno-unaligned-access)
36endif
37
38ifeq ($(CONFIG_FRAME_POINTER),y)
39KBUILD_CFLAGS +=-fno-omit-frame-pointer
40ifeq ($(CONFIG_CC_IS_GCC),y)
41KBUILD_CFLAGS += -mapcs -mno-sched-prolog
42endif
43endif
44
45ifeq ($(CONFIG_CPU_BIG_ENDIAN),y)
46KBUILD_CPPFLAGS += -mbig-endian
47CHECKFLAGS += -D__ARMEB__
48KBUILD_LDFLAGS += -EB
49else
50KBUILD_CPPFLAGS += -mlittle-endian
51CHECKFLAGS += -D__ARMEL__
52KBUILD_LDFLAGS += -EL
53endif
54
55#
56# The Scalar Replacement of Aggregates (SRA) optimization pass in GCC 4.9 and
57# later may result in code being generated that handles signed short and signed
58# char struct members incorrectly. So disable it.
59# (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65932)
60#
61KBUILD_CFLAGS += $(call cc-option,-fno-ipa-sra)
62
63# This selects which instruction set is used.
64# Note that GCC does not numerically define an architecture version
65# macro, but instead defines a whole series of macros which makes
66# testing for a specific architecture or later rather impossible.
67arch-$(CONFIG_CPU_32v7M) =-D__LINUX_ARM_ARCH__=7 -march=armv7-m -Wa,-march=armv7-m
68arch-$(CONFIG_CPU_32v7) =-D__LINUX_ARM_ARCH__=7 $(call cc-option,-march=armv7-a,-march=armv5t -Wa$(comma)-march=armv7-a)
69arch-$(CONFIG_CPU_32v6) =-D__LINUX_ARM_ARCH__=6 $(call cc-option,-march=armv6,-march=armv5t -Wa$(comma)-march=armv6)
70# Only override the compiler option if ARMv6. The ARMv6K extensions are
71# always available in ARMv7
72ifeq ($(CONFIG_CPU_32v6),y)
73arch-$(CONFIG_CPU_32v6K) =-D__LINUX_ARM_ARCH__=6 $(call cc-option,-march=armv6k,-march=armv5t -Wa$(comma)-march=armv6k)
74endif
75arch-$(CONFIG_CPU_32v5) =-D__LINUX_ARM_ARCH__=5 $(call cc-option,-march=armv5te,-march=armv4t)
76arch-$(CONFIG_CPU_32v4T) =-D__LINUX_ARM_ARCH__=4 -march=armv4t
77arch-$(CONFIG_CPU_32v4) =-D__LINUX_ARM_ARCH__=4 -march=armv4
78arch-$(CONFIG_CPU_32v3) =-D__LINUX_ARM_ARCH__=3 -march=armv3m
79
80# Evaluate arch cc-option calls now
81arch-y := $(arch-y)
82
83# This selects how we optimise for the processor.
84tune-$(CONFIG_CPU_ARM7TDMI) =-mtune=arm7tdmi
85tune-$(CONFIG_CPU_ARM720T) =-mtune=arm7tdmi
86tune-$(CONFIG_CPU_ARM740T) =-mtune=arm7tdmi
87tune-$(CONFIG_CPU_ARM9TDMI) =-mtune=arm9tdmi
88tune-$(CONFIG_CPU_ARM940T) =-mtune=arm9tdmi
89tune-$(CONFIG_CPU_ARM946E) =$(call cc-option,-mtune=arm9e,-mtune=arm9tdmi)
90tune-$(CONFIG_CPU_ARM920T) =-mtune=arm9tdmi
91tune-$(CONFIG_CPU_ARM922T) =-mtune=arm9tdmi
92tune-$(CONFIG_CPU_ARM925T) =-mtune=arm9tdmi
93tune-$(CONFIG_CPU_ARM926T) =-mtune=arm9tdmi
94tune-$(CONFIG_CPU_FA526) =-mtune=arm9tdmi
95tune-$(CONFIG_CPU_SA110) =-mtune=strongarm110
96tune-$(CONFIG_CPU_SA1100) =-mtune=strongarm1100
97tune-$(CONFIG_CPU_XSCALE) =$(call cc-option,-mtune=xscale,-mtune=strongarm110) -Wa,-mcpu=xscale
98tune-$(CONFIG_CPU_XSC3) =$(call cc-option,-mtune=xscale,-mtune=strongarm110) -Wa,-mcpu=xscale
99tune-$(CONFIG_CPU_FEROCEON) =$(call cc-option,-mtune=marvell-f,-mtune=xscale)
100tune-$(CONFIG_CPU_V6) =$(call cc-option,-mtune=arm1136j-s,-mtune=strongarm)
101tune-$(CONFIG_CPU_V6K) =$(call cc-option,-mtune=arm1136j-s,-mtune=strongarm)
102
103# Evaluate tune cc-option calls now
104tune-y := $(tune-y)
105
106ifeq ($(CONFIG_AEABI),y)
107CFLAGS_ABI :=-mabi=aapcs-linux -mfpu=vfp
108else
109CFLAGS_ABI :=$(call cc-option,-mapcs-32,-mabi=apcs-gnu) $(call cc-option,-mno-thumb-interwork,)
110endif
111
112ifeq ($(CONFIG_ARM_UNWIND),y)
113CFLAGS_ABI +=-funwind-tables
114endif
115
116ifeq ($(CONFIG_CC_IS_CLANG),y)
117CFLAGS_ABI += -meabi gnu
118endif
119
120# Accept old syntax despite ".syntax unified"
121AFLAGS_NOWARN :=$(call as-option,-Wa$(comma)-mno-warn-deprecated,-Wa$(comma)-W)
122
123ifeq ($(CONFIG_THUMB2_KERNEL),y)
124CFLAGS_ISA :=-mthumb -Wa,-mimplicit-it=always $(AFLAGS_NOWARN)
125AFLAGS_ISA :=$(CFLAGS_ISA) -Wa$(comma)-mthumb
126else
127CFLAGS_ISA :=$(call cc-option,-marm,) $(AFLAGS_NOWARN)
128AFLAGS_ISA :=$(CFLAGS_ISA)
129endif
130
131# Need -Uarm for gcc < 3.x
132KBUILD_CFLAGS +=$(CFLAGS_ABI) $(CFLAGS_ISA) $(arch-y) $(tune-y) $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,)) -msoft-float -Uarm
133KBUILD_AFLAGS +=$(CFLAGS_ABI) $(AFLAGS_ISA) $(arch-y) $(tune-y) -include asm/unified.h -msoft-float
134
135CHECKFLAGS += -D__arm__
136
137#Default value
138head-y := arch/arm/kernel/head$(MMUEXT).o
139
140# Text offset. This list is sorted numerically by address in order to
141# provide a means to avoid/resolve conflicts in multi-arch kernels.
142textofs-y := 0x00008000
143# We don't want the htc bootloader to corrupt kernel during resume
144textofs-$(CONFIG_PM_H1940) := 0x00108000
145# RTD1195 has Boot ROM at start of address space
146textofs-$(CONFIG_ARCH_REALTEK) := 0x00108000
147# SA1111 DMA bug: we don't want the kernel to live in precious DMA-able memory
148ifeq ($(CONFIG_ARCH_SA1100),y)
149textofs-$(CONFIG_SA1111) := 0x00208000
150endif
151textofs-$(CONFIG_ARCH_IPQ40XX) := 0x00208000
152textofs-$(CONFIG_ARCH_MSM8X60) := 0x00208000
153textofs-$(CONFIG_ARCH_MSM8960) := 0x00208000
154textofs-$(CONFIG_ARCH_MESON) := 0x00208000
155textofs-$(CONFIG_ARCH_AXXIA) := 0x00308000
156
157# Machine directory name. This list is sorted alphanumerically
158# by CONFIG_* macro name.
159machine-$(CONFIG_ARCH_ACTIONS) += actions
160machine-$(CONFIG_ARCH_ALPINE) += alpine
161machine-$(CONFIG_ARCH_ARTPEC) += artpec
162machine-$(CONFIG_ARCH_ASPEED) += aspeed
163machine-$(CONFIG_ARCH_AT91) += at91
164machine-$(CONFIG_ARCH_AXXIA) += axxia
165machine-$(CONFIG_ARCH_BCM) += bcm
166machine-$(CONFIG_ARCH_BERLIN) += berlin
167machine-$(CONFIG_ARCH_CLPS711X) += clps711x
168machine-$(CONFIG_ARCH_CNS3XXX) += cns3xxx
169machine-$(CONFIG_ARCH_DAVINCI) += davinci
170machine-$(CONFIG_ARCH_DIGICOLOR) += digicolor
171machine-$(CONFIG_ARCH_DOVE) += dove
172machine-$(CONFIG_ARCH_EBSA110) += ebsa110
173machine-$(CONFIG_ARCH_EFM32) += efm32
174machine-$(CONFIG_ARCH_EP93XX) += ep93xx
175machine-$(CONFIG_ARCH_EXYNOS) += exynos
176machine-$(CONFIG_ARCH_FOOTBRIDGE) += footbridge
177machine-$(CONFIG_ARCH_GEMINI) += gemini
178machine-$(CONFIG_ARCH_HIGHBANK) += highbank
179machine-$(CONFIG_ARCH_HISI) += hisi
180machine-$(CONFIG_ARCH_INTEGRATOR) += integrator
181machine-$(CONFIG_ARCH_IOP32X) += iop32x
182machine-$(CONFIG_ARCH_IXP4XX) += ixp4xx
183machine-$(CONFIG_ARCH_KEYSTONE) += keystone
184machine-$(CONFIG_ARCH_LPC18XX) += lpc18xx
185machine-$(CONFIG_ARCH_LPC32XX) += lpc32xx
186machine-$(CONFIG_ARCH_MESON) += meson
187machine-$(CONFIG_ARCH_MMP) += mmp
188machine-$(CONFIG_ARCH_MPS2) += vexpress
189machine-$(CONFIG_ARCH_MOXART) += moxart
190machine-$(CONFIG_ARCH_MV78XX0) += mv78xx0
191machine-$(CONFIG_ARCH_MVEBU) += mvebu
192machine-$(CONFIG_ARCH_MXC) += imx
193machine-$(CONFIG_ARCH_MEDIATEK) += mediatek
194machine-$(CONFIG_ARCH_MILBEAUT) += milbeaut
195machine-$(CONFIG_ARCH_MXS) += mxs
196machine-$(CONFIG_ARCH_MSTARV7) += mstar
197machine-$(CONFIG_ARCH_NOMADIK) += nomadik
198machine-$(CONFIG_ARCH_NPCM) += npcm
199machine-$(CONFIG_ARCH_NSPIRE) += nspire
200machine-$(CONFIG_ARCH_OXNAS) += oxnas
201machine-$(CONFIG_ARCH_OMAP1) += omap1
202machine-$(CONFIG_ARCH_OMAP2PLUS) += omap2
203machine-$(CONFIG_ARCH_ORION5X) += orion5x
204machine-$(CONFIG_ARCH_PICOXCELL) += picoxcell
205machine-$(CONFIG_ARCH_PXA) += pxa
206machine-$(CONFIG_ARCH_QCOM) += qcom
207machine-$(CONFIG_ARCH_RDA) += rda
208machine-$(CONFIG_ARCH_REALTEK) += realtek
209machine-$(CONFIG_ARCH_REALVIEW) += realview
210machine-$(CONFIG_ARCH_ROCKCHIP) += rockchip
211machine-$(CONFIG_ARCH_RPC) += rpc
212machine-$(CONFIG_ARCH_S3C24XX) += s3c24xx
213machine-$(CONFIG_ARCH_S3C64XX) += s3c64xx
214machine-$(CONFIG_ARCH_S5PV210) += s5pv210
215machine-$(CONFIG_ARCH_SA1100) += sa1100
216machine-$(CONFIG_ARCH_RENESAS) += shmobile
217machine-$(CONFIG_ARCH_SIRF) += prima2
218machine-$(CONFIG_ARCH_SOCFPGA) += socfpga
219machine-$(CONFIG_ARCH_STI) += sti
220machine-$(CONFIG_ARCH_STM32) += stm32
221machine-$(CONFIG_ARCH_SUNXI) += sunxi
222machine-$(CONFIG_ARCH_TANGO) += tango
223machine-$(CONFIG_ARCH_TEGRA) += tegra
224machine-$(CONFIG_ARCH_U300) += u300
225machine-$(CONFIG_ARCH_U8500) += ux500
226machine-$(CONFIG_ARCH_VERSATILE) += versatile
227machine-$(CONFIG_ARCH_VEXPRESS) += vexpress
228machine-$(CONFIG_ARCH_VT8500) += vt8500
229machine-$(CONFIG_ARCH_ZX) += zx
230machine-$(CONFIG_ARCH_ZYNQ) += zynq
231machine-$(CONFIG_PLAT_SPEAR) += spear
232
233# Platform directory name. This list is sorted alphanumerically
234# by CONFIG_* macro name.
235plat-$(CONFIG_ARCH_EXYNOS) += samsung
236plat-$(CONFIG_ARCH_OMAP) += omap
237plat-$(CONFIG_ARCH_S3C64XX) += samsung
238plat-$(CONFIG_ARCH_S5PV210) += samsung
239plat-$(CONFIG_PLAT_ORION) += orion
240plat-$(CONFIG_PLAT_PXA) += pxa
241plat-$(CONFIG_PLAT_S3C24XX) += samsung
242plat-$(CONFIG_PLAT_VERSATILE) += versatile
243
244ifeq ($(CONFIG_ARCH_EBSA110),y)
245# This is what happens if you forget the IOCS16 line.
246# PCMCIA cards stop working.
247CFLAGS_3c589_cs.o :=-DISA_SIXTEEN_BIT_PERIPHERAL
248export CFLAGS_3c589_cs.o
249endif
250
251# The byte offset of the kernel image in RAM from the start of RAM.
252TEXT_OFFSET := $(textofs-y)
253
254# The first directory contains additional information for the boot setup code
255ifneq ($(machine-y),)
256MACHINE := arch/arm/mach-$(word 1,$(machine-y))/
257else
258MACHINE :=
259endif
260ifeq ($(CONFIG_ARCH_MULTIPLATFORM),y)
261MACHINE :=
262endif
263
264machdirs := $(patsubst %,arch/arm/mach-%/,$(machine-y))
265platdirs := $(patsubst %,arch/arm/plat-%/,$(sort $(plat-y)))
266
267ifneq ($(CONFIG_ARCH_MULTIPLATFORM),y)
268ifneq ($(CONFIG_ARM_SINGLE_ARMV7M),y)
269KBUILD_CPPFLAGS += $(patsubst %,-I$(srctree)/%include,$(machdirs) $(platdirs))
270endif
271endif
272
273export TEXT_OFFSET GZFLAGS MMUEXT
274
275core-y += arch/arm/
276# If we have a machine-specific directory, then include it in the build.
277core-y += $(machdirs) $(platdirs)
278
279# For cleaning
280core- += $(patsubst %,arch/arm/mach-%/, $(machine-))
281core- += $(patsubst %,arch/arm/plat-%/, $(plat-))
282
283drivers-$(CONFIG_OPROFILE) += arch/arm/oprofile/
284
285libs-y := arch/arm/lib/ $(libs-y)
286
287# Default target when executing plain make
288boot := arch/arm/boot
289ifeq ($(CONFIG_XIP_KERNEL),y)
290KBUILD_IMAGE := $(boot)/xipImage
291else
292KBUILD_IMAGE := $(boot)/zImage
293endif
294
295ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y)
296prepare: stack_protector_prepare
297stack_protector_prepare: prepare0
298 $(eval SSP_PLUGIN_CFLAGS := \
299 -fplugin-arg-arm_ssp_per_task_plugin-tso=$(shell \
300 awk '{if ($$2 == "THREAD_SZ_ORDER") print $$3;}'\
301 include/generated/asm-offsets.h) \
302 -fplugin-arg-arm_ssp_per_task_plugin-offset=$(shell \
303 awk '{if ($$2 == "TI_STACK_CANARY") print $$3;}'\
304 include/generated/asm-offsets.h))
305 $(eval KBUILD_CFLAGS += $(SSP_PLUGIN_CFLAGS))
306 $(eval GCC_PLUGINS_CFLAGS += $(SSP_PLUGIN_CFLAGS))
307endif
308
309all: $(notdir $(KBUILD_IMAGE))
310
311
312archheaders:
313 $(Q)$(MAKE) $(build)=arch/arm/tools uapi
314
315archprepare:
316 $(Q)$(MAKE) $(build)=arch/arm/tools kapi
317
318# Convert bzImage to zImage
319bzImage: zImage
320
321BOOT_TARGETS = zImage Image xipImage bootpImage uImage
322INSTALL_TARGETS = zinstall uinstall install
323
324PHONY += bzImage $(BOOT_TARGETS) $(INSTALL_TARGETS)
325
326bootpImage uImage: zImage
327zImage: Image
328
329$(BOOT_TARGETS): vmlinux
330 $(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/$@
331 @$(kecho) ' Kernel: $(boot)/$@ is ready'
332
333$(INSTALL_TARGETS):
334 $(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $@
335
336PHONY += vdso_install
337vdso_install:
338ifeq ($(CONFIG_VDSO),y)
339 $(Q)$(MAKE) $(build)=arch/arm/vdso $@
340endif
341
342# We use MRPROPER_FILES and CLEAN_FILES now
343archclean:
344 $(Q)$(MAKE) $(clean)=$(boot)
345
346# My testing targets (bypasses dependencies)
347bp:; $(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/bootpImage
348
349
350define archhelp
351 echo '* zImage - Compressed kernel image (arch/$(ARCH)/boot/zImage)'
352 echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
353 echo '* xipImage - XIP kernel image, if configured (arch/$(ARCH)/boot/xipImage)'
354 echo ' uImage - U-Boot wrapped zImage'
355 echo ' bootpImage - Combined zImage and initial RAM disk'
356 echo ' (supply initrd image via make variable INITRD=<path>)'
357 echo ' install - Install uncompressed kernel'
358 echo ' zinstall - Install compressed kernel'
359 echo ' uinstall - Install U-Boot wrapped compressed kernel'
360 echo ' Install using (your) ~/bin/$(INSTALLKERNEL) or'
361 echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
362 echo ' install to $$(INSTALL_PATH) and run lilo'
363 echo ' vdso_install - Install unstripped vdso.so to $$(INSTALL_MOD_PATH)/vdso'
364endef