arch/arm/Makefile

   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   += $(call cc-option,-fno-dwarf2-cfi-asm)
  24
  25 # This should work on most of the modern platforms
  26 KBUILD_DEFCONFIG := multi_v7_defconfig
  27
  28 # defines filename extension depending memory management type.
  29 ifeq ($(CONFIG_MMU),)
  30 MMUEXT          := -nommu
  31 KBUILD_CFLAGS   += $(call cc-option,-mno-unaligned-access)
  32 endif
  33
  34 ifeq ($(CONFIG_FRAME_POINTER),y)
  35 KBUILD_CFLAGS   +=-fno-omit-frame-pointer
  36 ifeq ($(CONFIG_CC_IS_GCC),y)
  37 KBUILD_CFLAGS += -mapcs -mno-sched-prolog
  38 endif
  39 endif
  40
  41 ifeq ($(CONFIG_CPU_BIG_ENDIAN),y)
  42 KBUILD_CPPFLAGS += -mbig-endian
  43 CHECKFLAGS      += -D__ARMEB__
  44 KBUILD_LDFLAGS  += -EB
  45 else
  46 KBUILD_CPPFLAGS += -mlittle-endian
  47 CHECKFLAGS      += -D__ARMEL__
  48 KBUILD_LDFLAGS  += -EL
  49 endif
  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 #
  57 KBUILD_CFLAGS   += $(call cc-option,-fno-ipa-sra)
  58
  59 # This selects which instruction set is used.
  60 # Note that GCC does not numerically define an architecture version
  61 # macro, but instead defines a whole series of macros which makes
  62 # testing for a specific architecture or later rather impossible.
  63 arch-$(CONFIG_CPU_32v7M)        =-D__LINUX_ARM_ARCH__=7 -march=armv7-m
  64 arch-$(CONFIG_CPU_32v7)         =-D__LINUX_ARM_ARCH__=7 -march=armv7-a
  65 arch-$(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
  68 ifeq ($(CONFIG_CPU_32v6),y)
  69 arch-$(CONFIG_CPU_32v6K)        =-D__LINUX_ARM_ARCH__=6 -march=armv6k
  70 endif
  71 arch-$(CONFIG_CPU_32v5)         =-D__LINUX_ARM_ARCH__=5 -march=armv5te
  72 arch-$(CONFIG_CPU_32v4T)        =-D__LINUX_ARM_ARCH__=4 -march=armv4t
  73 arch-$(CONFIG_CPU_32v4)         =-D__LINUX_ARM_ARCH__=4 -march=armv4
  74 arch-$(CONFIG_CPU_32v3)         =-D__LINUX_ARM_ARCH__=3 -march=armv3m
  75
  76 # Evaluate arch cc-option calls now
  77 arch-y := $(arch-y)
  78
  79 # This selects how we optimise for the processor.
  80 tune-$(CONFIG_CPU_ARM7TDMI)     =-mtune=arm7tdmi
  81 tune-$(CONFIG_CPU_ARM720T)      =-mtune=arm7tdmi
  82 tune-$(CONFIG_CPU_ARM740T)      =-mtune=arm7tdmi
  83 tune-$(CONFIG_CPU_ARM9TDMI)     =-mtune=arm9tdmi
  84 tune-$(CONFIG_CPU_ARM940T)      =-mtune=arm9tdmi
  85 tune-$(CONFIG_CPU_ARM946E)      =-mtune=arm9e
  86 tune-$(CONFIG_CPU_ARM920T)      =-mtune=arm9tdmi
  87 tune-$(CONFIG_CPU_ARM922T)      =-mtune=arm9tdmi
  88 tune-$(CONFIG_CPU_ARM925T)      =-mtune=arm9tdmi
  89 tune-$(CONFIG_CPU_ARM926T)      =-mtune=arm9tdmi
  90 tune-$(CONFIG_CPU_FA526)        =-mtune=arm9tdmi
  91 tune-$(CONFIG_CPU_SA110)        =-mtune=strongarm110
  92 tune-$(CONFIG_CPU_SA1100)       =-mtune=strongarm1100
  93 tune-$(CONFIG_CPU_XSCALE)       =-mtune=xscale
  94 tune-$(CONFIG_CPU_XSC3)         =-mtune=xscale
  95 tune-$(CONFIG_CPU_FEROCEON)     =-mtune=xscale
  96 tune-$(CONFIG_CPU_V6)           =-mtune=arm1136j-s
  97 tune-$(CONFIG_CPU_V6K)          =-mtune=arm1136j-s
  98
  99 # Evaluate tune cc-option calls now
 100 tune-y := $(tune-y)
 101
 102 ifeq ($(CONFIG_AEABI),y)
 103 CFLAGS_ABI      :=-mabi=aapcs-linux -mfpu=vfp
 104 else
 105 CFLAGS_ABI      :=$(call cc-option,-mapcs-32,-mabi=apcs-gnu) $(call cc-option,-mno-thumb-interwork,)
 106 endif
 107
 108 ifeq ($(CONFIG_ARM_UNWIND),y)
 109 CFLAGS_ABI      +=-funwind-tables
 110 endif
 111
 112 ifeq ($(CONFIG_CC_IS_CLANG),y)
 113 CFLAGS_ABI      += -meabi gnu
 114 endif
 115
 116 ifeq ($(CONFIG_CURRENT_POINTER_IN_TPIDRURO),y)
 117 CFLAGS_ABI      += -mtp=cp15
 118 endif
 119
 120 # Accept old syntax despite ".syntax unified"
 121 AFLAGS_NOWARN   :=$(call as-option,-Wa$(comma)-mno-warn-deprecated,-Wa$(comma)-W)
 122
 123 ifeq ($(CONFIG_THUMB2_KERNEL),y)
 124 CFLAGS_ISA      :=-mthumb -Wa,-mimplicit-it=always $(AFLAGS_NOWARN)
 125 AFLAGS_ISA      :=$(CFLAGS_ISA) -Wa$(comma)-mthumb
 126 else
 127 CFLAGS_ISA      :=$(call cc-option,-marm,) $(AFLAGS_NOWARN)
 128 AFLAGS_ISA      :=$(CFLAGS_ISA)
 129 endif
 130
 131 # Need -Uarm for gcc < 3.x
 132 KBUILD_CFLAGS   +=$(CFLAGS_ABI) $(CFLAGS_ISA) $(arch-y) $(tune-y) $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,)) -msoft-float -Uarm
 133 KBUILD_AFLAGS   +=$(CFLAGS_ABI) $(AFLAGS_ISA) $(arch-y) $(tune-y) -include asm/unified.h -msoft-float
 134
 135 CHECKFLAGS      += -D__arm__
 136
 137 #Default value
 138 head-y          := arch/arm/kernel/head$(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.
 145 textofs-y       := 0x00008000
 146 # We don't want the htc bootloader to corrupt kernel during resume
 147 textofs-$(CONFIG_PM_H1940)      := 0x00108000
 148 # RTD1195 has Boot ROM at start of address space
 149 textofs-$(CONFIG_ARCH_REALTEK)  := 0x00108000
 150 # SA1111 DMA bug: we don't want the kernel to live in precious DMA-able memory
 151 ifeq ($(CONFIG_ARCH_SA1100),y)
 152 textofs-$(CONFIG_SA1111) := 0x00208000
 153 endif
 154 textofs-$(CONFIG_ARCH_IPQ40XX) := 0x00208000
 155 textofs-$(CONFIG_ARCH_MSM8X60) := 0x00208000
 156 textofs-$(CONFIG_ARCH_MSM8960) := 0x00208000
 157 textofs-$(CONFIG_ARCH_MESON) := 0x00208000
 158 textofs-$(CONFIG_ARCH_AXXIA) := 0x00308000
 159
 160 # Machine directory name.  This list is sorted alphanumerically
 161 # by CONFIG_* macro name.
 162 machine-$(CONFIG_ARCH_ACTIONS)          += actions
 163 machine-$(CONFIG_ARCH_AIROHA)           += airoha
 164 machine-$(CONFIG_ARCH_ALPINE)           += alpine
 165 machine-$(CONFIG_ARCH_ARTPEC)           += artpec
 166 machine-$(CONFIG_ARCH_ASPEED)           += aspeed
 167 machine-$(CONFIG_ARCH_AT91)             += at91
 168 machine-$(CONFIG_ARCH_AXXIA)            += axxia
 169 machine-$(CONFIG_ARCH_BCM)              += bcm
 170 machine-$(CONFIG_ARCH_BERLIN)           += berlin
 171 machine-$(CONFIG_ARCH_CLPS711X)         += clps711x
 172 machine-$(CONFIG_ARCH_CNS3XXX)          += cns3xxx
 173 machine-$(CONFIG_ARCH_DAVINCI)          += davinci
 174 machine-$(CONFIG_ARCH_DIGICOLOR)        += digicolor
 175 machine-$(CONFIG_ARCH_DOVE)             += dove
 176 machine-$(CONFIG_ARCH_EP93XX)           += ep93xx
 177 machine-$(CONFIG_ARCH_EXYNOS)           += exynos
 178 machine-$(CONFIG_ARCH_FOOTBRIDGE)       += footbridge
 179 machine-$(CONFIG_ARCH_GEMINI)           += gemini
 180 machine-$(CONFIG_ARCH_HIGHBANK)         += highbank
 181 machine-$(CONFIG_ARCH_HISI)             += hisi
 182 machine-$(CONFIG_ARCH_INTEGRATOR)       += integrator
 183 machine-$(CONFIG_ARCH_IOP32X)           += iop32x
 184 machine-$(CONFIG_ARCH_IXP4XX)           += ixp4xx
 185 machine-$(CONFIG_ARCH_KEYSTONE)         += keystone
 186 machine-$(CONFIG_ARCH_LPC18XX)          += lpc18xx
 187 machine-$(CONFIG_ARCH_LPC32XX)          += lpc32xx
 188 machine-$(CONFIG_ARCH_MESON)            += meson
 189 machine-$(CONFIG_ARCH_MMP)              += mmp
 190 machine-$(CONFIG_ARCH_MPS2)             += vexpress
 191 machine-$(CONFIG_ARCH_MOXART)           += moxart
 192 machine-$(CONFIG_ARCH_MV78XX0)          += mv78xx0
 193 machine-$(CONFIG_ARCH_MVEBU)            += mvebu
 194 machine-$(CONFIG_ARCH_MXC)              += imx
 195 machine-$(CONFIG_ARCH_MEDIATEK)         += mediatek
 196 machine-$(CONFIG_ARCH_MILBEAUT)         += milbeaut
 197 machine-$(CONFIG_ARCH_MXS)              += mxs
 198 machine-$(CONFIG_ARCH_MSTARV7)          += mstar
 199 machine-$(CONFIG_ARCH_NOMADIK)          += nomadik
 200 machine-$(CONFIG_ARCH_NPCM)             += npcm
 201 machine-$(CONFIG_ARCH_NSPIRE)           += nspire
 202 machine-$(CONFIG_ARCH_OXNAS)            += oxnas
 203 machine-$(CONFIG_ARCH_OMAP1)            += omap1
 204 machine-$(CONFIG_ARCH_OMAP2PLUS)        += omap2
 205 machine-$(CONFIG_ARCH_ORION5X)          += orion5x
 206 machine-$(CONFIG_ARCH_PXA)              += pxa
 207 machine-$(CONFIG_ARCH_QCOM)             += qcom
 208 machine-$(CONFIG_ARCH_RDA)              += rda
 209 machine-$(CONFIG_ARCH_REALTEK)          += realtek
 210 machine-$(CONFIG_ARCH_REALVIEW)         += realview
 211 machine-$(CONFIG_ARCH_ROCKCHIP)         += rockchip
 212 machine-$(CONFIG_ARCH_RPC)              += rpc
 213 machine-$(CONFIG_PLAT_SAMSUNG)          += s3c
 214 machine-$(CONFIG_ARCH_S5PV210)          += s5pv210
 215 machine-$(CONFIG_ARCH_SA1100)           += sa1100
 216 machine-$(CONFIG_ARCH_RENESAS)          += shmobile
 217 machine-$(CONFIG_ARCH_INTEL_SOCFPGA)    += socfpga
 218 machine-$(CONFIG_ARCH_STI)              += sti
 219 machine-$(CONFIG_ARCH_STM32)            += stm32
 220 machine-$(CONFIG_ARCH_SUNXI)            += sunxi
 221 machine-$(CONFIG_ARCH_TEGRA)            += tegra
 222 machine-$(CONFIG_ARCH_U8500)            += ux500
 223 machine-$(CONFIG_ARCH_VERSATILE)        += versatile
 224 machine-$(CONFIG_ARCH_VEXPRESS)         += vexpress
 225 machine-$(CONFIG_ARCH_VT8500)           += vt8500
 226 machine-$(CONFIG_ARCH_ZYNQ)             += zynq
 227 machine-$(CONFIG_PLAT_SPEAR)            += spear
 228
 229 # Platform directory name.  This list is sorted alphanumerically
 230 # by CONFIG_* macro name.
 231 plat-$(CONFIG_ARCH_OMAP)        += omap
 232 plat-$(CONFIG_PLAT_ORION)       += orion
 233 plat-$(CONFIG_PLAT_PXA)         += pxa
 234 plat-$(CONFIG_PLAT_VERSATILE)   += versatile
 235
 236 # The byte offset of the kernel image in RAM from the start of RAM.
 237 TEXT_OFFSET := $(textofs-y)
 238
 239 # The first directory contains additional information for the boot setup code
 240 ifneq ($(machine-y),)
 241 MACHINE  := arch/arm/mach-$(word 1,$(machine-y))/
 242 else
 243 MACHINE  :=
 244 endif
 245 ifeq ($(CONFIG_ARCH_MULTIPLATFORM),y)
 246 MACHINE  :=
 247 endif
 248
 249 machdirs := $(patsubst %,arch/arm/mach-%/,$(machine-y))
 250 platdirs := $(patsubst %,arch/arm/plat-%/,$(sort $(plat-y)))
 251
 252 ifneq ($(CONFIG_ARCH_MULTIPLATFORM),y)
 253 ifneq ($(CONFIG_ARM_SINGLE_ARMV7M),y)
 254 KBUILD_CPPFLAGS += $(patsubst %,-I$(srctree)/%include,$(machdirs) $(platdirs))
 255 endif
 256 endif
 257
 258 export  TEXT_OFFSET GZFLAGS MMUEXT
 259
 260 # If we have a machine-specific directory, then include it in the build.
 261 core-y                          += $(machdirs) $(platdirs)
 262
 263 # For cleaning
 264 core-                           += $(patsubst %,arch/arm/mach-%/, $(machine-))
 265 core-                           += $(patsubst %,arch/arm/plat-%/, $(plat-))
 266
 267 libs-y                          := arch/arm/lib/ $(libs-y)
 268
 269 # Default target when executing plain make
 270 boot := arch/arm/boot
 271 ifeq ($(CONFIG_XIP_KERNEL),y)
 272 KBUILD_IMAGE := $(boot)/xipImage
 273 else
 274 KBUILD_IMAGE := $(boot)/zImage
 275 endif
 276
 277 ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y)
 278 prepare: stack_protector_prepare
 279 ifeq ($(CONFIG_CC_HAVE_STACKPROTECTOR_TLS),y)
 280 stack_protector_prepare: prepare0
 281         $(eval KBUILD_CFLAGS += \
 282                 -mstack-protector-guard=tls \
 283                 -mstack-protector-guard-offset=$(shell  \
 284                         awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}'\
 285                                 include/generated/asm-offsets.h))
 286 else
 287 stack_protector_prepare: prepare0
 288         $(eval SSP_PLUGIN_CFLAGS := \
 289                 -fplugin-arg-arm_ssp_per_task_plugin-offset=$(shell     \
 290                         awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}'\
 291                                 include/generated/asm-offsets.h))
 292         $(eval KBUILD_CFLAGS += $(SSP_PLUGIN_CFLAGS))
 293         $(eval GCC_PLUGINS_CFLAGS += $(SSP_PLUGIN_CFLAGS))
 294 endif
 295 endif
 296
 297 all:    $(notdir $(KBUILD_IMAGE))
 298
 299
 300 archheaders:
 301         $(Q)$(MAKE) $(build)=arch/arm/tools uapi
 302
 303 archprepare:
 304         $(Q)$(MAKE) $(build)=arch/arm/tools kapi
 305
 306 # Convert bzImage to zImage
 307 bzImage: zImage
 308
 309 BOOT_TARGETS    = zImage Image xipImage bootpImage uImage
 310 INSTALL_TARGETS = zinstall uinstall install
 311
 312 PHONY += bzImage $(BOOT_TARGETS) $(INSTALL_TARGETS)
 313
 314 bootpImage uImage: zImage
 315 zImage: Image
 316
 317 $(BOOT_TARGETS): vmlinux
 318         $(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/$@
 319         @$(kecho) '  Kernel: $(boot)/$@ is ready'
 320
 321 $(INSTALL_TARGETS):
 322         $(CONFIG_SHELL) $(srctree)/$(boot)/install.sh "$(KERNELRELEASE)" \
 323         $(boot)/$(patsubst %install,%Image,$@) System.map "$(INSTALL_PATH)"
 324
 325 PHONY += vdso_install
 326 vdso_install:
 327 ifeq ($(CONFIG_VDSO),y)
 328         $(Q)$(MAKE) $(build)=arch/arm/vdso $@
 329 endif
 330
 331 # My testing targets (bypasses dependencies)
 332 bp:;    $(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/bootpImage
 333
 334
 335 define archhelp
 336   echo  '* zImage        - Compressed kernel image (arch/$(ARCH)/boot/zImage)'
 337   echo  '  Image         - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
 338   echo  '* xipImage      - XIP kernel image, if configured (arch/$(ARCH)/boot/xipImage)'
 339   echo  '  uImage        - U-Boot wrapped zImage'
 340   echo  '  bootpImage    - Combined zImage and initial RAM disk'
 341   echo  '                  (supply initrd image via make variable INITRD=<path>)'
 342   echo  '  install       - Install uncompressed kernel'
 343   echo  '  zinstall      - Install compressed kernel'
 344   echo  '  uinstall      - Install U-Boot wrapped compressed kernel'
 345   echo  '                  Install using (your) ~/bin/$(INSTALLKERNEL) or'
 346   echo  '                  (distribution) /sbin/$(INSTALLKERNEL) or'
 347   echo  '                  install to $$(INSTALL_PATH) and run lilo'
 348   echo  '  vdso_install  - Install unstripped vdso.so to $$(INSTALL_MOD_PATH)/vdso'
 349 endef