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 -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 += $(call cc-option,-fno-ipa-sra)
61
62# This selects which instruction set is used.
63# Note that GCC does not numerically define an architecture version
64# macro, but instead defines a whole series of macros which makes
65# testing for a specific architecture or later rather impossible.
66arch-$(CONFIG_CPU_32v7M) =-D__LINUX_ARM_ARCH__=7 -march=armv7-m
67arch-$(CONFIG_CPU_32v7) =-D__LINUX_ARM_ARCH__=7 -march=armv7-a
68arch-$(CONFIG_CPU_32v6) =-D__LINUX_ARM_ARCH__=6 -march=armv6
69# Only override the compiler option if ARMv6. The ARMv6K extensions are
70# always available in ARMv7
71ifeq ($(CONFIG_CPU_32v6),y)
72arch-$(CONFIG_CPU_32v6K) =-D__LINUX_ARM_ARCH__=6 -march=armv6k
73endif
74arch-$(CONFIG_CPU_32v5) =-D__LINUX_ARM_ARCH__=5 -march=armv5te
75arch-$(CONFIG_CPU_32v4T) =-D__LINUX_ARM_ARCH__=4 -march=armv4t
76arch-$(CONFIG_CPU_32v4) =-D__LINUX_ARM_ARCH__=4 -march=armv4
77arch-$(CONFIG_CPU_32v3) =-D__LINUX_ARM_ARCH__=3 -march=armv3m
78
79# Evaluate arch cc-option calls now
80arch-y := $(arch-y)
81
82# This selects how we optimise for the processor.
83tune-$(CONFIG_CPU_ARM7TDMI) =-mtune=arm7tdmi
84tune-$(CONFIG_CPU_ARM720T) =-mtune=arm7tdmi
85tune-$(CONFIG_CPU_ARM740T) =-mtune=arm7tdmi
86tune-$(CONFIG_CPU_ARM9TDMI) =-mtune=arm9tdmi
87tune-$(CONFIG_CPU_ARM940T) =-mtune=arm9tdmi
88tune-$(CONFIG_CPU_ARM946E) =-mtune=arm9e
89tune-$(CONFIG_CPU_ARM920T) =-mtune=arm9tdmi
90tune-$(CONFIG_CPU_ARM922T) =-mtune=arm9tdmi
91tune-$(CONFIG_CPU_ARM925T) =-mtune=arm9tdmi
92tune-$(CONFIG_CPU_ARM926T) =-mtune=arm9tdmi
93tune-$(CONFIG_CPU_FA526) =-mtune=arm9tdmi
94tune-$(CONFIG_CPU_SA110) =-mtune=strongarm110
95tune-$(CONFIG_CPU_SA1100) =-mtune=strongarm1100
96tune-$(CONFIG_CPU_XSCALE) =-mtune=xscale
97tune-$(CONFIG_CPU_XSC3) =-mtune=xscale
98tune-$(CONFIG_CPU_FEROCEON) =-mtune=xscale
99tune-$(CONFIG_CPU_V6) =-mtune=arm1136j-s
100tune-$(CONFIG_CPU_V6K) =-mtune=arm1136j-s
101
102# Evaluate tune cc-option calls now
103tune-y := $(tune-y)
104
105ifeq ($(CONFIG_AEABI),y)
106CFLAGS_ABI :=-mabi=aapcs-linux -mfpu=vfp
107else
108CFLAGS_ABI :=$(call cc-option,-mapcs-32,-mabi=apcs-gnu) $(call cc-option,-mno-thumb-interwork,)
109endif
110
111ifeq ($(CONFIG_ARM_UNWIND),y)
112CFLAGS_ABI +=-funwind-tables
113endif
114
115ifeq ($(CONFIG_CC_IS_CLANG),y)
116CFLAGS_ABI += -meabi gnu
117endif
118
119ifeq ($(CONFIG_CURRENT_POINTER_IN_TPIDRURO),y)
120CFLAGS_ABI += -mtp=cp15
121endif
122
123# Accept old syntax despite ".syntax unified"
124AFLAGS_NOWARN :=$(call as-option,-Wa$(comma)-mno-warn-deprecated,-Wa$(comma)-W)
125
126ifeq ($(CONFIG_THUMB2_KERNEL),y)
127CFLAGS_ISA :=-mthumb -Wa,-mimplicit-it=always $(AFLAGS_NOWARN)
128AFLAGS_ISA :=$(CFLAGS_ISA) -Wa$(comma)-mthumb
129else
130CFLAGS_ISA :=$(call cc-option,-marm,) $(AFLAGS_NOWARN)
131AFLAGS_ISA :=$(CFLAGS_ISA)
132endif
133
134# Need -Uarm for gcc < 3.x
135KBUILD_CFLAGS +=$(CFLAGS_ABI) $(CFLAGS_ISA) $(arch-y) $(tune-y) $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,)) -msoft-float -Uarm
136KBUILD_AFLAGS +=$(CFLAGS_ABI) $(AFLAGS_ISA) $(arch-y) $(tune-y) -include asm/unified.h -msoft-float
137
138CHECKFLAGS += -D__arm__
139
140# Text offset. This list is sorted numerically by address in order to
141# provide a means to avoid/resolve conflicts in multi-arch kernels.
142# Note: the 32kB below this value is reserved for use by the kernel
143# during boot, and this offset is critical to the functioning of
144# kexec-tools.
145textofs-y := 0x00008000
146# We don't want the htc bootloader to corrupt kernel during resume
147textofs-$(CONFIG_PM_H1940) := 0x00108000
148# RTD1195 has Boot ROM at start of address space
149textofs-$(CONFIG_ARCH_REALTEK) := 0x00108000
150# SA1111 DMA bug: we don't want the kernel to live in precious DMA-able memory
151ifeq ($(CONFIG_ARCH_SA1100),y)
152textofs-$(CONFIG_SA1111) := 0x00208000
153endif
154textofs-$(CONFIG_ARCH_IPQ40XX) := 0x00208000
155textofs-$(CONFIG_ARCH_MSM8X60) := 0x00208000
156textofs-$(CONFIG_ARCH_MSM8960) := 0x00208000
157textofs-$(CONFIG_ARCH_MESON) := 0x00208000
158textofs-$(CONFIG_ARCH_AXXIA) := 0x00308000
159
160# Machine directory name. This list is sorted alphanumerically
161# by CONFIG_* macro name.
162machine-$(CONFIG_ARCH_ACTIONS) += actions
163machine-$(CONFIG_ARCH_AIROHA) += airoha
164machine-$(CONFIG_ARCH_ALPINE) += alpine
165machine-$(CONFIG_ARCH_ARTPEC) += artpec
166machine-$(CONFIG_ARCH_ASPEED) += aspeed
167machine-$(CONFIG_ARCH_AT91) += at91
168machine-$(CONFIG_ARCH_AXXIA) += axxia
169machine-$(CONFIG_ARCH_BCM) += bcm
170machine-$(CONFIG_ARCH_BERLIN) += berlin
171machine-$(CONFIG_ARCH_CLPS711X) += clps711x
172machine-$(CONFIG_ARCH_CNS3XXX) += cns3xxx
173machine-$(CONFIG_ARCH_DAVINCI) += davinci
174machine-$(CONFIG_ARCH_DIGICOLOR) += digicolor
175machine-$(CONFIG_ARCH_DOVE) += dove
176machine-$(CONFIG_ARCH_EP93XX) += ep93xx
177machine-$(CONFIG_ARCH_EXYNOS) += exynos
178machine-$(CONFIG_ARCH_FOOTBRIDGE) += footbridge
179machine-$(CONFIG_ARCH_GEMINI) += gemini
180machine-$(CONFIG_ARCH_HIGHBANK) += highbank
181machine-$(CONFIG_ARCH_HISI) += hisi
182machine-$(CONFIG_ARCH_HPE) += hpe
183machine-$(CONFIG_ARCH_IOP32X) += iop32x
184machine-$(CONFIG_ARCH_IXP4XX) += ixp4xx
185machine-$(CONFIG_ARCH_KEYSTONE) += keystone
186machine-$(CONFIG_ARCH_LPC18XX) += lpc18xx
187machine-$(CONFIG_ARCH_LPC32XX) += lpc32xx
188machine-$(CONFIG_ARCH_MESON) += meson
189machine-$(CONFIG_ARCH_MMP) += mmp
190machine-$(CONFIG_ARCH_MOXART) += moxart
191machine-$(CONFIG_ARCH_MV78XX0) += mv78xx0
192machine-$(CONFIG_ARCH_MVEBU) += mvebu
193machine-$(CONFIG_ARCH_MXC) += imx
194machine-$(CONFIG_ARCH_MEDIATEK) += mediatek
195machine-$(CONFIG_ARCH_MILBEAUT) += milbeaut
196machine-$(CONFIG_ARCH_MXS) += mxs
197machine-$(CONFIG_ARCH_MSTARV7) += mstar
198machine-$(CONFIG_ARCH_NOMADIK) += nomadik
199machine-$(CONFIG_ARCH_NPCM) += npcm
200machine-$(CONFIG_ARCH_NSPIRE) += nspire
201machine-$(CONFIG_ARCH_OXNAS) += oxnas
202machine-$(CONFIG_ARCH_OMAP1) += omap1
203machine-$(CONFIG_ARCH_OMAP2PLUS) += omap2
204machine-$(CONFIG_ARCH_ORION5X) += orion5x
205machine-$(CONFIG_ARCH_PXA) += pxa
206machine-$(CONFIG_ARCH_QCOM) += qcom
207machine-$(CONFIG_ARCH_RDA) += rda
208machine-$(CONFIG_ARCH_REALTEK) += realtek
209machine-$(CONFIG_ARCH_ROCKCHIP) += rockchip
210machine-$(CONFIG_ARCH_RPC) += rpc
211machine-$(CONFIG_PLAT_SAMSUNG) += s3c
212machine-$(CONFIG_ARCH_S5PV210) += s5pv210
213machine-$(CONFIG_ARCH_SA1100) += sa1100
214machine-$(CONFIG_ARCH_RENESAS) += shmobile
215machine-$(CONFIG_ARCH_INTEL_SOCFPGA) += socfpga
216machine-$(CONFIG_ARCH_STI) += sti
217machine-$(CONFIG_ARCH_STM32) += stm32
218machine-$(CONFIG_ARCH_SUNPLUS) += sunplus
219machine-$(CONFIG_ARCH_SUNXI) += sunxi
220machine-$(CONFIG_ARCH_TEGRA) += tegra
221machine-$(CONFIG_ARCH_U8500) += ux500
222machine-$(CONFIG_ARCH_VT8500) += vt8500
223machine-$(CONFIG_ARCH_ZYNQ) += zynq
224machine-$(CONFIG_PLAT_VERSATILE) += versatile
225machine-$(CONFIG_PLAT_SPEAR) += spear
226
227# legacy platforms provide their own mach/*.h headers globally,
228# these three are mutually exclusive
229machdirs-$(CONFIG_ARCH_FOOTBRIDGE) += arch/arm/mach-footbridge
230machdirs-$(CONFIG_ARCH_RPC) += arch/arm/mach-rpc
231machdirs-$(CONFIG_ARCH_SA1100) += arch/arm/mach-sa1100
232KBUILD_CPPFLAGS += $(patsubst %,-I$(srctree)/%/include,$(machdirs-y))
233
234# The byte offset of the kernel image in RAM from the start of RAM.
235TEXT_OFFSET := $(textofs-y)
236
237export TEXT_OFFSET GZFLAGS MMUEXT
238
239# If we have a machine-specific directory, then include it in the build.
240core-y += $(patsubst %,arch/arm/mach-%/,$(machine-y))
241# For cleaning
242core- += $(patsubst %,arch/arm/mach-%/,$(machine-))
243
244core-$(CONFIG_PLAT_ORION) += arch/arm/plat-orion/
245
246libs-y := arch/arm/lib/ $(libs-y)
247
248# Default target when executing plain make
249boot := arch/arm/boot
250ifeq ($(CONFIG_XIP_KERNEL),y)
251KBUILD_IMAGE := $(boot)/xipImage
252else
253KBUILD_IMAGE := $(boot)/zImage
254endif
255
256ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y)
257prepare: stack_protector_prepare
258ifeq ($(CONFIG_CC_HAVE_STACKPROTECTOR_TLS),y)
259stack_protector_prepare: prepare0
260 $(eval KBUILD_CFLAGS += \
261 -mstack-protector-guard=tls \
262 -mstack-protector-guard-offset=$(shell \
263 awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}'\
264 include/generated/asm-offsets.h))
265else
266stack_protector_prepare: prepare0
267 $(eval SSP_PLUGIN_CFLAGS := \
268 -fplugin-arg-arm_ssp_per_task_plugin-offset=$(shell \
269 awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}'\
270 include/generated/asm-offsets.h))
271 $(eval KBUILD_CFLAGS += $(SSP_PLUGIN_CFLAGS))
272 $(eval GCC_PLUGINS_CFLAGS += $(SSP_PLUGIN_CFLAGS))
273endif
274endif
275
276all: $(notdir $(KBUILD_IMAGE))
277
278
279archheaders:
280 $(Q)$(MAKE) $(build)=arch/arm/tools uapi
281
282archprepare:
283 $(Q)$(MAKE) $(build)=arch/arm/tools kapi
284
285# Convert bzImage to zImage
286bzImage: zImage
287
288BOOT_TARGETS = zImage Image xipImage bootpImage uImage
289INSTALL_TARGETS = zinstall uinstall install
290
291PHONY += bzImage $(BOOT_TARGETS) $(INSTALL_TARGETS)
292
293bootpImage uImage: zImage
294zImage: Image
295
296$(BOOT_TARGETS): vmlinux
297 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
298 @$(kecho) ' Kernel: $(boot)/$@ is ready'
299
300$(INSTALL_TARGETS): KBUILD_IMAGE = $(boot)/$(patsubst %install,%Image,$@)
301$(INSTALL_TARGETS):
302 $(call cmd,install)
303
304PHONY += vdso_install
305vdso_install:
306ifeq ($(CONFIG_VDSO),y)
307 $(Q)$(MAKE) $(build)=arch/arm/vdso $@
308endif
309
310# My testing targets (bypasses dependencies)
311bp:; $(Q)$(MAKE) $(build)=$(boot) $(boot)/bootpImage
312
313
314define archhelp
315 echo '* zImage - Compressed kernel image (arch/$(ARCH)/boot/zImage)'
316 echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
317 echo '* xipImage - XIP kernel image, if configured (arch/$(ARCH)/boot/xipImage)'
318 echo ' uImage - U-Boot wrapped zImage'
319 echo ' bootpImage - Combined zImage and initial RAM disk'
320 echo ' (supply initrd image via make variable INITRD=<path>)'
321 echo ' install - Install uncompressed kernel'
322 echo ' zinstall - Install compressed kernel'
323 echo ' uinstall - Install U-Boot wrapped compressed kernel'
324 echo ' Install using (your) ~/bin/$(INSTALLKERNEL) or'
325 echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
326 echo ' install to $$(INSTALL_PATH) and run lilo'
327 echo ' vdso_install - Install unstripped vdso.so to $$(INSTALL_MOD_PATH)/vdso'
328endef