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
-z norelro
14 ifeq ($(CONFIG_CPU_ENDIAN_BE8
),y
)
15 LDFLAGS_vmlinux
+= --be8
16 KBUILD_LDFLAGS_MODULE
+= --be8
20 #KBUILD_CFLAGS +=-pipe
22 # Never generate .eh_frame
23 KBUILD_CFLAGS
+= $(call cc-option
,-fno-dwarf2-cfi-asm
)
25 # This should work on most of the modern platforms
26 KBUILD_DEFCONFIG
:= multi_v7_defconfig
28 # defines filename extension depending memory management type.
31 KBUILD_CFLAGS
+= $(call cc-option
,-mno-unaligned-access
)
34 ifeq ($(CONFIG_FRAME_POINTER
),y
)
35 KBUILD_CFLAGS
+=-fno-omit-frame-pointer
36 ifeq ($(CONFIG_CC_IS_GCC
),y
)
37 KBUILD_CFLAGS
+= -mapcs
-mno-sched-prolog
41 ifeq ($(CONFIG_CPU_BIG_ENDIAN
),y
)
42 KBUILD_CPPFLAGS
+= -mbig-endian
43 CHECKFLAGS
+= -D__ARMEB__
46 KBUILD_CPPFLAGS
+= -mlittle-endian
47 CHECKFLAGS
+= -D__ARMEL__
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)
57 KBUILD_CFLAGS
+= $(call cc-option
,-fno-ipa-sra
)
59 # Need -msoft-float for gcc 11 for the below instruction set selection
60 KBUILD_CFLAGS
+= -msoft-float
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.
66 arch-
$(CONFIG_CPU_32v7M
) =-D__LINUX_ARM_ARCH__
=7 -march
=armv7-m
67 arch-
$(CONFIG_CPU_32v7
) =-D__LINUX_ARM_ARCH__
=7 -march
=armv7-a
68 arch-
$(CONFIG_CPU_32v6
) =-D__LINUX_ARM_ARCH__
=6 -march
=armv6
69 # Only override the compiler option if ARMv6. The ARMv6K extensions are
70 # always available in ARMv7
71 ifeq ($(CONFIG_CPU_32v6
),y
)
72 arch-
$(CONFIG_CPU_32v6K
) =-D__LINUX_ARM_ARCH__
=6 -march
=armv6k
74 arch-
$(CONFIG_CPU_32v5
) =-D__LINUX_ARM_ARCH__
=5 -march
=armv5te
75 arch-
$(CONFIG_CPU_32v4T
) =-D__LINUX_ARM_ARCH__
=4 -march
=armv4t
76 arch-
$(CONFIG_CPU_32v4
) =-D__LINUX_ARM_ARCH__
=4 -march
=armv4
77 arch-
$(CONFIG_CPU_32v3
) =-D__LINUX_ARM_ARCH__
=3 -march
=armv3m
79 # Evaluate arch cc-option calls now
82 # This selects how we optimise for the processor.
83 tune-
$(CONFIG_CPU_ARM7TDMI
) =-mtune
=arm7tdmi
84 tune-
$(CONFIG_CPU_ARM720T
) =-mtune
=arm7tdmi
85 tune-
$(CONFIG_CPU_ARM740T
) =-mtune
=arm7tdmi
86 tune-
$(CONFIG_CPU_ARM9TDMI
) =-mtune
=arm9tdmi
87 tune-
$(CONFIG_CPU_ARM940T
) =-mtune
=arm9tdmi
88 tune-
$(CONFIG_CPU_ARM946E
) =-mtune
=arm9e
89 tune-
$(CONFIG_CPU_ARM920T
) =-mtune
=arm9tdmi
90 tune-
$(CONFIG_CPU_ARM922T
) =-mtune
=arm9tdmi
91 tune-
$(CONFIG_CPU_ARM925T
) =-mtune
=arm9tdmi
92 tune-
$(CONFIG_CPU_ARM926T
) =-mtune
=arm9tdmi
93 tune-
$(CONFIG_CPU_FA526
) =-mtune
=arm9tdmi
94 tune-
$(CONFIG_CPU_SA110
) =-mtune
=strongarm110
95 tune-
$(CONFIG_CPU_SA1100
) =-mtune
=strongarm1100
96 tune-
$(CONFIG_CPU_XSCALE
) =-mtune
=xscale
97 tune-
$(CONFIG_CPU_XSC3
) =-mtune
=xscale
98 tune-
$(CONFIG_CPU_FEROCEON
) =-mtune
=xscale
99 tune-
$(CONFIG_CPU_V6
) =-mtune
=arm1136j-s
100 tune-
$(CONFIG_CPU_V6K
) =-mtune
=arm1136j-s
102 # Evaluate tune cc-option calls now
105 ifeq ($(CONFIG_AEABI
),y
)
106 CFLAGS_ABI
:=-mabi
=aapcs-linux
-mfpu
=vfp
108 CFLAGS_ABI
:=$(call cc-option
,-mapcs-32
,-mabi
=apcs-gnu
) $(call cc-option
,-mno-thumb-interwork
,)
111 ifeq ($(CONFIG_ARM_UNWIND
),y
)
112 CFLAGS_ABI
+=-funwind-tables
115 ifeq ($(CONFIG_CC_IS_CLANG
),y
)
116 CFLAGS_ABI
+= -meabi gnu
119 # Accept old syntax despite ".syntax unified"
120 AFLAGS_NOWARN
:=$(call as-option
,-Wa
$(comma
)-mno-warn-deprecated
,-Wa
$(comma
)-W
)
122 ifeq ($(CONFIG_THUMB2_KERNEL
),y
)
123 CFLAGS_ISA
:=-mthumb
-Wa
,-mimplicit-it
=always
$(AFLAGS_NOWARN
)
124 AFLAGS_ISA
:=$(CFLAGS_ISA
) -Wa
$(comma
)-mthumb
126 CFLAGS_ISA
:=$(call cc-option
,-marm
,) $(AFLAGS_NOWARN
)
127 AFLAGS_ISA
:=$(CFLAGS_ISA
)
130 # Need -Uarm for gcc < 3.x
131 KBUILD_CFLAGS
+=$(CFLAGS_ABI
) $(CFLAGS_ISA
) $(arch-y
) $(tune-y
) $(call cc-option
,-mshort-load-bytes
,$(call cc-option
,-malignment-traps
,)) -Uarm
132 KBUILD_AFLAGS
+=$(CFLAGS_ABI
) $(AFLAGS_ISA
) $(arch-y
) $(tune-y
) -include asm
/unified.h
-msoft-float
134 CHECKFLAGS
+= -D__arm__
137 head-y
:= arch
/arm
/kernel
/head
$(MMUEXT
).o
139 # Text offset. This list is sorted numerically by address in order to
140 # provide a means to avoid/resolve conflicts in multi-arch kernels.
141 # Note: the 32kB below this value is reserved for use by the kernel
142 # during boot, and this offset is critical to the functioning of
144 textofs-y
:= 0x00008000
145 # We don't want the htc bootloader to corrupt kernel during resume
146 textofs-
$(CONFIG_PM_H1940
) := 0x00108000
147 # RTD1195 has Boot ROM at start of address space
148 textofs-
$(CONFIG_ARCH_REALTEK
) := 0x00108000
149 # SA1111 DMA bug: we don't want the kernel to live in precious DMA-able memory
150 ifeq ($(CONFIG_ARCH_SA1100
),y
)
151 textofs-
$(CONFIG_SA1111
) := 0x00208000
153 textofs-
$(CONFIG_ARCH_IPQ40XX
) := 0x00208000
154 textofs-
$(CONFIG_ARCH_MSM8X60
) := 0x00208000
155 textofs-
$(CONFIG_ARCH_MSM8960
) := 0x00208000
156 textofs-
$(CONFIG_ARCH_MESON
) := 0x00208000
157 textofs-
$(CONFIG_ARCH_AXXIA
) := 0x00308000
159 # Machine directory name. This list is sorted alphanumerically
160 # by CONFIG_* macro name.
161 machine-
$(CONFIG_ARCH_ACTIONS
) += actions
162 machine-
$(CONFIG_ARCH_ALPINE
) += alpine
163 machine-
$(CONFIG_ARCH_ARTPEC
) += artpec
164 machine-
$(CONFIG_ARCH_ASPEED
) += aspeed
165 machine-
$(CONFIG_ARCH_AT91
) += at91
166 machine-
$(CONFIG_ARCH_AXXIA
) += axxia
167 machine-
$(CONFIG_ARCH_BCM
) += bcm
168 machine-
$(CONFIG_ARCH_BERLIN
) += berlin
169 machine-
$(CONFIG_ARCH_CLPS711X
) += clps711x
170 machine-
$(CONFIG_ARCH_CNS3XXX
) += cns3xxx
171 machine-
$(CONFIG_ARCH_DAVINCI
) += davinci
172 machine-
$(CONFIG_ARCH_DIGICOLOR
) += digicolor
173 machine-
$(CONFIG_ARCH_DOVE
) += dove
174 machine-
$(CONFIG_ARCH_EP93XX
) += ep93xx
175 machine-
$(CONFIG_ARCH_EXYNOS
) += exynos
176 machine-
$(CONFIG_ARCH_FOOTBRIDGE
) += footbridge
177 machine-
$(CONFIG_ARCH_GEMINI
) += gemini
178 machine-
$(CONFIG_ARCH_HIGHBANK
) += highbank
179 machine-
$(CONFIG_ARCH_HISI
) += hisi
180 machine-
$(CONFIG_ARCH_INTEGRATOR
) += integrator
181 machine-
$(CONFIG_ARCH_IOP32X
) += iop32x
182 machine-
$(CONFIG_ARCH_IXP4XX
) += ixp4xx
183 machine-
$(CONFIG_ARCH_KEYSTONE
) += keystone
184 machine-
$(CONFIG_ARCH_LPC18XX
) += lpc18xx
185 machine-
$(CONFIG_ARCH_LPC32XX
) += lpc32xx
186 machine-
$(CONFIG_ARCH_MESON
) += meson
187 machine-
$(CONFIG_ARCH_MMP
) += mmp
188 machine-
$(CONFIG_ARCH_MPS2
) += vexpress
189 machine-
$(CONFIG_ARCH_MOXART
) += moxart
190 machine-
$(CONFIG_ARCH_MV78XX0
) += mv78xx0
191 machine-
$(CONFIG_ARCH_MVEBU
) += mvebu
192 machine-
$(CONFIG_ARCH_MXC
) += imx
193 machine-
$(CONFIG_ARCH_MEDIATEK
) += mediatek
194 machine-
$(CONFIG_ARCH_MILBEAUT
) += milbeaut
195 machine-
$(CONFIG_ARCH_MXS
) += mxs
196 machine-
$(CONFIG_ARCH_MSTARV7
) += mstar
197 machine-
$(CONFIG_ARCH_NOMADIK
) += nomadik
198 machine-
$(CONFIG_ARCH_NPCM
) += npcm
199 machine-
$(CONFIG_ARCH_NSPIRE
) += nspire
200 machine-
$(CONFIG_ARCH_OXNAS
) += oxnas
201 machine-
$(CONFIG_ARCH_OMAP1
) += omap1
202 machine-
$(CONFIG_ARCH_OMAP2PLUS
) += omap2
203 machine-
$(CONFIG_ARCH_ORION5X
) += orion5x
204 machine-
$(CONFIG_ARCH_PXA
) += pxa
205 machine-
$(CONFIG_ARCH_QCOM
) += qcom
206 machine-
$(CONFIG_ARCH_RDA
) += rda
207 machine-
$(CONFIG_ARCH_REALTEK
) += realtek
208 machine-
$(CONFIG_ARCH_REALVIEW
) += realview
209 machine-
$(CONFIG_ARCH_ROCKCHIP
) += rockchip
210 machine-
$(CONFIG_ARCH_RPC
) += rpc
211 machine-
$(CONFIG_PLAT_SAMSUNG
) += s3c
212 machine-
$(CONFIG_ARCH_S5PV210
) += s5pv210
213 machine-
$(CONFIG_ARCH_SA1100
) += sa1100
214 machine-
$(CONFIG_ARCH_RENESAS
) += shmobile
215 machine-
$(CONFIG_ARCH_INTEL_SOCFPGA
) += socfpga
216 machine-
$(CONFIG_ARCH_STI
) += sti
217 machine-
$(CONFIG_ARCH_STM32
) += stm32
218 machine-
$(CONFIG_ARCH_SUNXI
) += sunxi
219 machine-
$(CONFIG_ARCH_TEGRA
) += tegra
220 machine-
$(CONFIG_ARCH_U8500
) += ux500
221 machine-
$(CONFIG_ARCH_VERSATILE
) += versatile
222 machine-
$(CONFIG_ARCH_VEXPRESS
) += vexpress
223 machine-
$(CONFIG_ARCH_VT8500
) += vt8500
224 machine-
$(CONFIG_ARCH_ZYNQ
) += zynq
225 machine-
$(CONFIG_PLAT_SPEAR
) += spear
227 # Platform directory name. This list is sorted alphanumerically
228 # by CONFIG_* macro name.
229 plat-
$(CONFIG_ARCH_OMAP
) += omap
230 plat-
$(CONFIG_PLAT_ORION
) += orion
231 plat-
$(CONFIG_PLAT_PXA
) += pxa
232 plat-
$(CONFIG_PLAT_VERSATILE
) += versatile
234 # The byte offset of the kernel image in RAM from the start of RAM.
235 TEXT_OFFSET
:= $(textofs-y
)
237 # The first directory contains additional information for the boot setup code
238 ifneq ($(machine-y
),)
239 MACHINE
:= arch
/arm
/mach-
$(word 1,$(machine-y
))/
243 ifeq ($(CONFIG_ARCH_MULTIPLATFORM
),y
)
247 machdirs
:= $(patsubst %,arch
/arm
/mach-
%/,$(machine-y
))
248 platdirs
:= $(patsubst %,arch
/arm
/plat-
%/,$(sort $(plat-y
)))
250 ifneq ($(CONFIG_ARCH_MULTIPLATFORM
),y
)
251 ifneq ($(CONFIG_ARM_SINGLE_ARMV7M
),y
)
252 KBUILD_CPPFLAGS
+= $(patsubst %,-I
$(srctree
)/%include,$(machdirs
) $(platdirs
))
256 export TEXT_OFFSET GZFLAGS MMUEXT
258 # If we have a machine-specific directory, then include it in the build.
259 core-y
+= $(machdirs
) $(platdirs
)
262 core-
+= $(patsubst %,arch
/arm
/mach-
%/, $(machine-
))
263 core-
+= $(patsubst %,arch
/arm
/plat-
%/, $(plat-
))
265 libs-y
:= arch
/arm
/lib
/ $(libs-y
)
267 # Default target when executing plain make
268 boot
:= arch
/arm
/boot
269 ifeq ($(CONFIG_XIP_KERNEL
),y
)
270 KBUILD_IMAGE
:= $(boot
)/xipImage
272 KBUILD_IMAGE
:= $(boot
)/zImage
275 ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK
),y
)
276 prepare
: stack_protector_prepare
277 stack_protector_prepare
: prepare0
278 $(eval SSP_PLUGIN_CFLAGS
:= \
279 -fplugin-arg-arm_ssp_per_task_plugin-tso
=$(shell \
280 awk
'{if ($$2 == "THREAD_SZ_ORDER") print $$3;}'\
281 include/generated
/asm-offsets.h
) \
282 -fplugin-arg-arm_ssp_per_task_plugin-offset
=$(shell \
283 awk
'{if ($$2 == "TI_STACK_CANARY") print $$3;}'\
284 include/generated
/asm-offsets.h
))
285 $(eval KBUILD_CFLAGS
+= $(SSP_PLUGIN_CFLAGS
))
286 $(eval GCC_PLUGINS_CFLAGS
+= $(SSP_PLUGIN_CFLAGS
))
289 all: $(notdir $(KBUILD_IMAGE
))
293 $(Q
)$(MAKE
) $(build
)=arch
/arm
/tools uapi
296 $(Q
)$(MAKE
) $(build
)=arch
/arm
/tools kapi
298 # Convert bzImage to zImage
301 BOOT_TARGETS
= zImage Image xipImage bootpImage uImage
302 INSTALL_TARGETS
= zinstall uinstall
install
304 PHONY
+= bzImage
$(BOOT_TARGETS
) $(INSTALL_TARGETS
)
306 bootpImage uImage
: zImage
309 $(BOOT_TARGETS
): vmlinux
310 $(Q
)$(MAKE
) $(build
)=$(boot
) MACHINE
=$(MACHINE
) $(boot
)/$@
311 @
$(kecho
) ' Kernel: $(boot)/$@ is ready'
314 $(CONFIG_SHELL
) $(srctree
)/$(boot
)/install.sh
"$(KERNELRELEASE)" \
315 $(boot
)/$(patsubst %install,%Image
,$@
) System.map
"$(INSTALL_PATH)"
317 PHONY
+= vdso_install
319 ifeq ($(CONFIG_VDSO
),y
)
320 $(Q
)$(MAKE
) $(build
)=arch
/arm
/vdso
$@
323 # We use MRPROPER_FILES and CLEAN_FILES now
325 $(Q
)$(MAKE
) $(clean)=$(boot
)
327 # My testing targets (bypasses dependencies)
328 bp
:; $(Q
)$(MAKE
) $(build
)=$(boot
) MACHINE
=$(MACHINE
) $(boot
)/bootpImage
332 echo
'* zImage - Compressed kernel image (arch/$(ARCH)/boot/zImage)'
333 echo
' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
334 echo
'* xipImage - XIP kernel image, if configured (arch/$(ARCH)/boot/xipImage)'
335 echo
' uImage - U-Boot wrapped zImage'
336 echo
' bootpImage - Combined zImage and initial RAM disk'
337 echo
' (supply initrd image via make variable INITRD=<path>)'
338 echo
' install - Install uncompressed kernel'
339 echo
' zinstall - Install compressed kernel'
340 echo
' uinstall - Install U-Boot wrapped compressed kernel'
341 echo
' Install using (your) ~/bin/$(INSTALLKERNEL) or'
342 echo
' (distribution) /sbin/$(INSTALLKERNEL) or'
343 echo
' install to $$(INSTALL_PATH) and run lilo'
344 echo
' vdso_install - Install unstripped vdso.so to $$(INSTALL_MOD_PATH)/vdso'