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 += $(call cc-option,-fno-dwarf2-cfi-asm)
24
25# This should work on most of the modern platforms
26KBUILD_DEFCONFIG := multi_v7_defconfig
27
28# defines filename extension depending memory management type.
29ifeq ($(CONFIG_MMU),)
30MMUEXT := -nommu
31KBUILD_CFLAGS += $(call cc-option,-mno-unaligned-access)
32endif
33
34ifeq ($(CONFIG_FRAME_POINTER),y)
35KBUILD_CFLAGS +=-fno-omit-frame-pointer
36ifeq ($(CONFIG_CC_IS_GCC),y)
37KBUILD_CFLAGS += -mapcs -mno-sched-prolog
38endif
39endif
40
41ifeq ($(CONFIG_CPU_BIG_ENDIAN),y)
42KBUILD_CPPFLAGS += -mbig-endian
43CHECKFLAGS += -D__ARMEB__
44KBUILD_LDFLAGS += -EB
45else
46KBUILD_CPPFLAGS += -mlittle-endian
47CHECKFLAGS += -D__ARMEL__
48KBUILD_LDFLAGS += -EL
49endif
50
51#
52# The Scalar Replacement of Aggregates (SRA) optimization pass in GCC 4.9 and
53# later may result in code being generated that handles signed short and signed
54# char struct members incorrectly. So disable it.
55# (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65932)
56#
57KBUILD_CFLAGS += $(call cc-option,-fno-ipa-sra)
58
59# This selects which instruction set is used.
60# Note that GCC does not numerically define an architecture version
61# macro, but instead defines a whole series of macros which makes
62# testing for a specific architecture or later rather impossible.
63arch-$(CONFIG_CPU_32v7M) =-D__LINUX_ARM_ARCH__=7 -march=armv7-m
64arch-$(CONFIG_CPU_32v7) =-D__LINUX_ARM_ARCH__=7 -march=armv7-a
65arch-$(CONFIG_CPU_32v6) =-D__LINUX_ARM_ARCH__=6 -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) =-D__LINUX_ARM_ARCH__=6 -march=armv6k
70endif
71arch-$(CONFIG_CPU_32v5) =-D__LINUX_ARM_ARCH__=5 -march=armv5te
72arch-$(CONFIG_CPU_32v4T) =-D__LINUX_ARM_ARCH__=4 -march=armv4t
73arch-$(CONFIG_CPU_32v4) =-D__LINUX_ARM_ARCH__=4 -march=armv4
74arch-$(CONFIG_CPU_32v3) =-D__LINUX_ARM_ARCH__=3 -march=armv3m
75
76# Evaluate arch cc-option calls now
77arch-y := $(arch-y)
78
79# This selects how we optimise for the processor.
80tune-$(CONFIG_CPU_ARM7TDMI) =-mtune=arm7tdmi
81tune-$(CONFIG_CPU_ARM720T) =-mtune=arm7tdmi
82tune-$(CONFIG_CPU_ARM740T) =-mtune=arm7tdmi
83tune-$(CONFIG_CPU_ARM9TDMI) =-mtune=arm9tdmi
84tune-$(CONFIG_CPU_ARM940T) =-mtune=arm9tdmi
85tune-$(CONFIG_CPU_ARM946E) =-mtune=arm9e
86tune-$(CONFIG_CPU_ARM920T) =-mtune=arm9tdmi
87tune-$(CONFIG_CPU_ARM922T) =-mtune=arm9tdmi
88tune-$(CONFIG_CPU_ARM925T) =-mtune=arm9tdmi
89tune-$(CONFIG_CPU_ARM926T) =-mtune=arm9tdmi
90tune-$(CONFIG_CPU_FA526) =-mtune=arm9tdmi
91tune-$(CONFIG_CPU_SA110) =-mtune=strongarm110
92tune-$(CONFIG_CPU_SA1100) =-mtune=strongarm1100
93tune-$(CONFIG_CPU_XSCALE) =-mtune=xscale
94tune-$(CONFIG_CPU_XSC3) =-mtune=xscale
95tune-$(CONFIG_CPU_FEROCEON) =-mtune=xscale
96tune-$(CONFIG_CPU_V6) =-mtune=arm1136j-s
97tune-$(CONFIG_CPU_V6K) =-mtune=arm1136j-s
98
99# Evaluate tune cc-option calls now
100tune-y := $(tune-y)
101
102ifeq ($(CONFIG_AEABI),y)
103CFLAGS_ABI :=-mabi=aapcs-linux -mfpu=vfp
104else
105CFLAGS_ABI :=$(call cc-option,-mapcs-32,-mabi=apcs-gnu) $(call cc-option,-mno-thumb-interwork,)
106endif
107
108ifeq ($(CONFIG_ARM_UNWIND),y)
109CFLAGS_ABI +=-funwind-tables
110endif
111
112ifeq ($(CONFIG_CC_IS_CLANG),y)
113CFLAGS_ABI += -meabi gnu
114endif
115
116ifeq ($(CONFIG_CURRENT_POINTER_IN_TPIDRURO),y)
117CFLAGS_ABI += -mtp=cp15
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.
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_SUNXI) += sunxi
219machine-$(CONFIG_ARCH_TEGRA) += tegra
220machine-$(CONFIG_ARCH_U8500) += ux500
221machine-$(CONFIG_ARCH_VT8500) += vt8500
222machine-$(CONFIG_ARCH_ZYNQ) += zynq
223machine-$(CONFIG_PLAT_VERSATILE) += versatile
224machine-$(CONFIG_PLAT_SPEAR) += spear
225
226# Platform directory name. This list is sorted alphanumerically
227# by CONFIG_* macro name.
228plat-$(CONFIG_PLAT_ORION) += orion
229
230# The byte offset of the kernel image in RAM from the start of RAM.
231TEXT_OFFSET := $(textofs-y)
232
233# The first directory contains additional information for the boot setup code
234ifneq ($(machine-y),)
235MACHINE := arch/arm/mach-$(word 1,$(machine-y))/
236else
237MACHINE :=
238endif
239ifeq ($(CONFIG_ARCH_MULTIPLATFORM),y)
240MACHINE :=
241endif
242
243machdirs := $(patsubst %,arch/arm/mach-%/,$(machine-y))
244platdirs := $(patsubst %,arch/arm/plat-%/,$(sort $(plat-y)))
245
246ifneq ($(CONFIG_ARCH_MULTIPLATFORM),y)
247ifneq ($(CONFIG_ARM_SINGLE_ARMV7M),y)
248KBUILD_CPPFLAGS += $(patsubst %,-I$(srctree)/%include,$(machdirs) $(platdirs))
249endif
250endif
251
252export TEXT_OFFSET GZFLAGS MMUEXT
253
254# If we have a machine-specific directory, then include it in the build.
255core-y += $(machdirs) $(platdirs)
256
257# For cleaning
258core- += $(patsubst %,arch/arm/mach-%/, $(machine-))
259core- += $(patsubst %,arch/arm/plat-%/, $(plat-))
260
261libs-y := arch/arm/lib/ $(libs-y)
262
263# Default target when executing plain make
264boot := arch/arm/boot
265ifeq ($(CONFIG_XIP_KERNEL),y)
266KBUILD_IMAGE := $(boot)/xipImage
267else
268KBUILD_IMAGE := $(boot)/zImage
269endif
270
271ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y)
272prepare: stack_protector_prepare
273ifeq ($(CONFIG_CC_HAVE_STACKPROTECTOR_TLS),y)
274stack_protector_prepare: prepare0
275 $(eval KBUILD_CFLAGS += \
276 -mstack-protector-guard=tls \
277 -mstack-protector-guard-offset=$(shell \
278 awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}'\
279 include/generated/asm-offsets.h))
280else
281stack_protector_prepare: prepare0
282 $(eval SSP_PLUGIN_CFLAGS := \
283 -fplugin-arg-arm_ssp_per_task_plugin-offset=$(shell \
284 awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}'\
285 include/generated/asm-offsets.h))
286 $(eval KBUILD_CFLAGS += $(SSP_PLUGIN_CFLAGS))
287 $(eval GCC_PLUGINS_CFLAGS += $(SSP_PLUGIN_CFLAGS))
288endif
289endif
290
291all: $(notdir $(KBUILD_IMAGE))
292
293
294archheaders:
295 $(Q)$(MAKE) $(build)=arch/arm/tools uapi
296
297archprepare:
298 $(Q)$(MAKE) $(build)=arch/arm/tools kapi
299
300# Convert bzImage to zImage
301bzImage: zImage
302
303BOOT_TARGETS = zImage Image xipImage bootpImage uImage
304INSTALL_TARGETS = zinstall uinstall install
305
306PHONY += bzImage $(BOOT_TARGETS) $(INSTALL_TARGETS)
307
308bootpImage uImage: zImage
309zImage: Image
310
311$(BOOT_TARGETS): vmlinux
312 $(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/$@
313 @$(kecho) ' Kernel: $(boot)/$@ is ready'
314
315$(INSTALL_TARGETS): KBUILD_IMAGE = $(boot)/$(patsubst %install,%Image,$@)
316$(INSTALL_TARGETS):
317 $(call cmd,install)
318
319PHONY += vdso_install
320vdso_install:
321ifeq ($(CONFIG_VDSO),y)
322 $(Q)$(MAKE) $(build)=arch/arm/vdso $@
323endif
324
325# My testing targets (bypasses dependencies)
326bp:; $(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/bootpImage
327
328
329define archhelp
330 echo '* zImage - Compressed kernel image (arch/$(ARCH)/boot/zImage)'
331 echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
332 echo '* xipImage - XIP kernel image, if configured (arch/$(ARCH)/boot/xipImage)'
333 echo ' uImage - U-Boot wrapped zImage'
334 echo ' bootpImage - Combined zImage and initial RAM disk'
335 echo ' (supply initrd image via make variable INITRD=<path>)'
336 echo ' install - Install uncompressed kernel'
337 echo ' zinstall - Install compressed kernel'
338 echo ' uinstall - Install U-Boot wrapped compressed kernel'
339 echo ' Install using (your) ~/bin/$(INSTALLKERNEL) or'
340 echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
341 echo ' install to $$(INSTALL_PATH) and run lilo'
342 echo ' vdso_install - Install unstripped vdso.so to $$(INSTALL_MOD_PATH)/vdso'
343endef