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   += $(call cc-option,-fno-ipa-sra)
  58
  59 # Need -msoft-float for gcc 11 for the below instruction set selection
  60 KBUILD_CFLAGS   += -msoft-float
  61
  62 # This selects which instruction set is used.
  63 # Note that GCC does not numerically define an architecture version
  64 # macro, but instead defines a whole series of macros which makes
  65 # testing for a specific architecture or later rather impossible.
  66 arch-$(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
  73 endif
  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
  78
  79 # Evaluate arch cc-option calls now
  80 arch-y := $(arch-y)
  81
  82 # This selects how we optimise for the processor.
  83 tune-$(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
 101
 102 # Evaluate tune cc-option calls now
 103 tune-y := $(tune-y)
 104
 105 ifeq ($(CONFIG_AEABI),y)
 106 CFLAGS_ABI      :=-mabi=aapcs-linux -mfpu=vfp
 107 else
 108 CFLAGS_ABI      :=$(call cc-option,-mapcs-32,-mabi=apcs-gnu) $(call cc-option,-mno-thumb-interwork,)
 109 endif
 110
 111 ifeq ($(CONFIG_ARM_UNWIND),y)
 112 CFLAGS_ABI      +=-funwind-tables
 113 endif
 114
 115 ifeq ($(CONFIG_CC_IS_CLANG),y)
 116 CFLAGS_ABI      += -meabi gnu
 117 endif
 118
 119 # Accept old syntax despite ".syntax unified"
 120 AFLAGS_NOWARN   :=$(call as-option,-Wa$(comma)-mno-warn-deprecated,-Wa$(comma)-W)
 121
 122 ifeq ($(CONFIG_THUMB2_KERNEL),y)
 123 CFLAGS_ISA      :=-mthumb -Wa,-mimplicit-it=always $(AFLAGS_NOWARN)
 124 AFLAGS_ISA      :=$(CFLAGS_ISA) -Wa$(comma)-mthumb
 125 else
 126 CFLAGS_ISA      :=$(call cc-option,-marm,) $(AFLAGS_NOWARN)
 127 AFLAGS_ISA      :=$(CFLAGS_ISA)
 128 endif
 129
 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) $(tune-y) -include asm/unified.h -msoft-float
 133
 134 CHECKFLAGS      += -D__arm__
 135
 136 #Default value
 137 head-y          := arch/arm/kernel/head$(MMUEXT).o
 138
 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
 143 # kexec-tools.
 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
 152 endif
 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-$(CONFIG_ARCH_AXXIA) := 0x00308000
 158
 159 # Machine directory name.  This list is sorted alphanumerically
 160 # by CONFIG_* macro name.
 161 machine-$(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
 226
 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
 233
 234 # The byte offset of the kernel image in RAM from the start of RAM.
 235 TEXT_OFFSET := $(textofs-y)
 236
 237 # The first directory contains additional information for the boot setup code
 238 ifneq ($(machine-y),)
 239 MACHINE  := arch/arm/mach-$(word 1,$(machine-y))/
 240 else
 241 MACHINE  :=
 242 endif
 243 ifeq ($(CONFIG_ARCH_MULTIPLATFORM),y)
 244 MACHINE  :=
 245 endif
 246
 247 machdirs := $(patsubst %,arch/arm/mach-%/,$(machine-y))
 248 platdirs := $(patsubst %,arch/arm/plat-%/,$(sort $(plat-y)))
 249
 250 ifneq ($(CONFIG_ARCH_MULTIPLATFORM),y)
 251 ifneq ($(CONFIG_ARM_SINGLE_ARMV7M),y)
 252 KBUILD_CPPFLAGS += $(patsubst %,-I$(srctree)/%include,$(machdirs) $(platdirs))
 253 endif
 254 endif
 255
 256 export  TEXT_OFFSET GZFLAGS MMUEXT
 257
 258 # If we have a machine-specific directory, then include it in the build.
 259 core-y                          += $(machdirs) $(platdirs)
 260
 261 # For cleaning
 262 core-                           += $(patsubst %,arch/arm/mach-%/, $(machine-))
 263 core-                           += $(patsubst %,arch/arm/plat-%/, $(plat-))
 264
 265 libs-y                          := arch/arm/lib/ $(libs-y)
 266
 267 # Default target when executing plain make
 268 boot := arch/arm/boot
 269 ifeq ($(CONFIG_XIP_KERNEL),y)
 270 KBUILD_IMAGE := $(boot)/xipImage
 271 else
 272 KBUILD_IMAGE := $(boot)/zImage
 273 endif
 274
 275 ifeq ($(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))
 287 endif
 288
 289 all:    $(notdir $(KBUILD_IMAGE))
 290
 291
 292 archheaders:
 293         $(Q)$(MAKE) $(build)=arch/arm/tools uapi
 294
 295 archprepare:
 296         $(Q)$(MAKE) $(build)=arch/arm/tools kapi
 297
 298 # Convert bzImage to zImage
 299 bzImage: zImage
 300
 301 BOOT_TARGETS    = zImage Image xipImage bootpImage uImage
 302 INSTALL_TARGETS = zinstall uinstall install
 303
 304 PHONY += bzImage $(BOOT_TARGETS) $(INSTALL_TARGETS)
 305
 306 bootpImage uImage: zImage
 307 zImage: Image
 308
 309 $(BOOT_TARGETS): vmlinux
 310         $(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/$@
 311         @$(kecho) '  Kernel: $(boot)/$@ is ready'
 312
 313 $(INSTALL_TARGETS):
 314         $(CONFIG_SHELL) $(srctree)/$(boot)/install.sh "$(KERNELRELEASE)" \
 315         $(boot)/$(patsubst %install,%Image,$@) System.map "$(INSTALL_PATH)"
 316
 317 PHONY += vdso_install
 318 vdso_install:
 319 ifeq ($(CONFIG_VDSO),y)
 320         $(Q)$(MAKE) $(build)=arch/arm/vdso $@
 321 endif
 322
 323 # We use MRPROPER_FILES and CLEAN_FILES now
 324 archclean:
 325         $(Q)$(MAKE) $(clean)=$(boot)
 326
 327 # My testing targets (bypasses dependencies)
 328 bp:;    $(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/bootpImage
 329
 330
 331 define archhelp
 332   echo  '* zImage        - Compressed kernel image (arch/$(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'
 345 endef