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 # Disable FDPIC ABI
  26 KBUILD_CFLAGS   += $(call cc-option,-mno-fdpic)
  27
  28 # This should work on most of the modern platforms
  29 KBUILD_DEFCONFIG := multi_v7_defconfig
  30
  31 # defines filename extension depending memory management type.
  32 ifeq ($(CONFIG_MMU),)
  33 MMUEXT          := -nommu
  34 KBUILD_CFLAGS   += $(call cc-option,-mno-unaligned-access)
  35 endif
  36
  37 ifeq ($(CONFIG_FRAME_POINTER),y)
  38 KBUILD_CFLAGS   +=-fno-omit-frame-pointer
  39 ifeq ($(CONFIG_CC_IS_GCC),y)
  40 KBUILD_CFLAGS += -mapcs -mno-sched-prolog
  41 endif
  42 endif
  43
  44 ifeq ($(CONFIG_CPU_BIG_ENDIAN),y)
  45 KBUILD_CPPFLAGS += -mbig-endian
  46 CHECKFLAGS      += -D__ARMEB__
  47 KBUILD_LDFLAGS  += -EB
  48 else
  49 KBUILD_CPPFLAGS += -mlittle-endian
  50 CHECKFLAGS      += -D__ARMEL__
  51 KBUILD_LDFLAGS  += -EL
  52 endif
  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 #
  60 KBUILD_CFLAGS   += $(call cc-option,-fno-ipa-sra)
  61
  62 # This selects which instruction set is used.
  63 arch-$(CONFIG_CPU_32v7M)        :=-march=armv7-m
  64 arch-$(CONFIG_CPU_32v7)         :=-march=armv7-a
  65 arch-$(CONFIG_CPU_32v6)         :=-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)        :=-march=armv6k
  70 endif
  71 arch-$(CONFIG_CPU_32v5)         :=-march=armv5te
  72 arch-$(CONFIG_CPU_32v4T)        :=-march=armv4t
  73 arch-$(CONFIG_CPU_32v4)         :=-march=armv4
  74 arch-$(CONFIG_CPU_32v3)         :=-march=armv3m
  75
  76 # Note that GCC does not numerically define an architecture version
  77 # macro, but instead defines a whole series of macros which makes
  78 # testing for a specific architecture or later rather impossible.
  79 cpp-$(CONFIG_CPU_32v7M)         :=-D__LINUX_ARM_ARCH__=7
  80 cpp-$(CONFIG_CPU_32v7)          :=-D__LINUX_ARM_ARCH__=7
  81 cpp-$(CONFIG_CPU_32v6)          :=-D__LINUX_ARM_ARCH__=6
  82 # Only override the compiler option if ARMv6. The ARMv6K extensions are
  83 # always available in ARMv7
  84 ifeq ($(CONFIG_CPU_32v6),y)
  85 cpp-$(CONFIG_CPU_32v6K)         :=-D__LINUX_ARM_ARCH__=6
  86 endif
  87 cpp-$(CONFIG_CPU_32v5)          :=-D__LINUX_ARM_ARCH__=5
  88 cpp-$(CONFIG_CPU_32v4T)         :=-D__LINUX_ARM_ARCH__=4
  89 cpp-$(CONFIG_CPU_32v4)          :=-D__LINUX_ARM_ARCH__=4
  90 cpp-$(CONFIG_CPU_32v3)          :=-D__LINUX_ARM_ARCH__=3
  91
  92 # This selects how we optimise for the processor.
  93 tune-$(CONFIG_CPU_ARM7TDMI)     :=-mtune=arm7tdmi
  94 tune-$(CONFIG_CPU_ARM720T)      :=-mtune=arm7tdmi
  95 tune-$(CONFIG_CPU_ARM740T)      :=-mtune=arm7tdmi
  96 tune-$(CONFIG_CPU_ARM9TDMI)     :=-mtune=arm9tdmi
  97 tune-$(CONFIG_CPU_ARM940T)      :=-mtune=arm9tdmi
  98 tune-$(CONFIG_CPU_ARM946E)      :=-mtune=arm9e
  99 tune-$(CONFIG_CPU_ARM920T)      :=-mtune=arm9tdmi
 100 tune-$(CONFIG_CPU_ARM922T)      :=-mtune=arm9tdmi
 101 tune-$(CONFIG_CPU_ARM925T)      :=-mtune=arm9tdmi
 102 tune-$(CONFIG_CPU_ARM926T)      :=-mtune=arm9tdmi
 103 tune-$(CONFIG_CPU_FA526)        :=-mtune=arm9tdmi
 104 tune-$(CONFIG_CPU_SA110)        :=-mtune=strongarm110
 105 tune-$(CONFIG_CPU_SA1100)       :=-mtune=strongarm1100
 106 tune-$(CONFIG_CPU_XSCALE)       :=-mtune=xscale
 107 tune-$(CONFIG_CPU_XSC3)         :=-mtune=xscale
 108 tune-$(CONFIG_CPU_FEROCEON)     :=-mtune=xscale
 109 tune-$(CONFIG_CPU_V6)           :=-mtune=arm1136j-s
 110 tune-$(CONFIG_CPU_V6K)          :=-mtune=arm1136j-s
 111
 112 ifeq ($(CONFIG_AEABI),y)
 113 CFLAGS_ABI      :=-mabi=aapcs-linux -mfpu=vfp
 114 else
 115 CFLAGS_ABI      :=$(call cc-option,-mapcs-32,-mabi=apcs-gnu) $(call cc-option,-mno-thumb-interwork,)
 116 endif
 117
 118 ifeq ($(CONFIG_ARM_UNWIND),y)
 119 CFLAGS_ABI      +=-funwind-tables
 120 endif
 121
 122 ifeq ($(CONFIG_CC_IS_CLANG),y)
 123 CFLAGS_ABI      += -meabi gnu
 124 endif
 125
 126 ifeq ($(CONFIG_CURRENT_POINTER_IN_TPIDRURO),y)
 127 KBUILD_CFLAGS   += -mtp=cp15
 128 endif
 129
 130 # Accept old syntax despite ".syntax unified"
 131 AFLAGS_NOWARN   :=$(call as-option,-Wa$(comma)-mno-warn-deprecated,-Wa$(comma)-W)
 132
 133 # The GCC option -ffreestanding is required in order to compile code containing
 134 # ARM/NEON intrinsics in a non C99-compliant environment (such as the kernel)
 135 CC_FLAGS_FPU    := -ffreestanding
 136 # Enable <arm_neon.h>
 137 CC_FLAGS_FPU    += -isystem $(shell $(CC) -print-file-name=include)
 138 CC_FLAGS_FPU    += -march=armv7-a -mfloat-abi=softfp -mfpu=neon
 139
 140 ifeq ($(CONFIG_THUMB2_KERNEL),y)
 141 CFLAGS_ISA      :=-Wa,-mimplicit-it=always $(AFLAGS_NOWARN)
 142 AFLAGS_ISA      :=$(CFLAGS_ISA) -Wa$(comma)-mthumb
 143 CFLAGS_ISA      +=-mthumb
 144 else
 145 CFLAGS_ISA      :=$(call cc-option,-marm,) $(AFLAGS_NOWARN)
 146 AFLAGS_ISA      :=$(CFLAGS_ISA)
 147 endif
 148
 149 # Need -Uarm for gcc < 3.x
 150 KBUILD_CPPFLAGS +=$(cpp-y)
 151 KBUILD_CFLAGS   +=$(CFLAGS_ABI) $(CFLAGS_ISA) $(arch-y) $(tune-y) $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,)) -msoft-float -Uarm
 152 KBUILD_AFLAGS   +=$(CFLAGS_ABI) $(AFLAGS_ISA) -Wa,$(arch-y) $(tune-y) -include asm/unified.h -msoft-float
 153
 154 CHECKFLAGS      += -D__arm__
 155
 156 # Text offset. This list is sorted numerically by address in order to
 157 # provide a means to avoid/resolve conflicts in multi-arch kernels.
 158 # Note: the 32kB below this value is reserved for use by the kernel
 159 # during boot, and this offset is critical to the functioning of
 160 # kexec-tools.
 161 textofs-y       := 0x00008000
 162 # RTD1195 has Boot ROM at start of address space
 163 textofs-$(CONFIG_ARCH_REALTEK)  := 0x00108000
 164 # SA1111 DMA bug: we don't want the kernel to live in precious DMA-able memory
 165 ifeq ($(CONFIG_ARCH_SA1100),y)
 166 textofs-$(CONFIG_SA1111) := 0x00208000
 167 endif
 168 textofs-$(CONFIG_ARCH_QCOM_RESERVE_SMEM) := 0x00208000
 169 textofs-$(CONFIG_ARCH_MESON) := 0x00208000
 170 textofs-$(CONFIG_ARCH_AXXIA) := 0x00308000
 171
 172 # Machine directory name.  This list is sorted alphanumerically
 173 # by CONFIG_* macro name.
 174 machine-$(CONFIG_ARCH_ACTIONS)          += actions
 175 machine-$(CONFIG_ARCH_ALPINE)           += alpine
 176 machine-$(CONFIG_ARCH_ARTPEC)           += artpec
 177 machine-$(CONFIG_ARCH_ASPEED)           += aspeed
 178 machine-$(CONFIG_ARCH_AT91)             += at91
 179 machine-$(CONFIG_ARCH_AXXIA)            += axxia
 180 machine-$(CONFIG_ARCH_BCM)              += bcm
 181 machine-$(CONFIG_ARCH_BERLIN)           += berlin
 182 machine-$(CONFIG_ARCH_CLPS711X)         += clps711x
 183 machine-$(CONFIG_ARCH_DAVINCI)          += davinci
 184 machine-$(CONFIG_ARCH_DIGICOLOR)        += digicolor
 185 machine-$(CONFIG_ARCH_DOVE)             += dove
 186 machine-$(CONFIG_ARCH_EXYNOS)           += exynos
 187 machine-$(CONFIG_ARCH_FOOTBRIDGE)       += footbridge
 188 machine-$(CONFIG_ARCH_GEMINI)           += gemini
 189 machine-$(CONFIG_ARCH_HIGHBANK)         += highbank
 190 machine-$(CONFIG_ARCH_HISI)             += hisi
 191 machine-$(CONFIG_ARCH_HPE)              += hpe
 192 machine-$(CONFIG_ARCH_IXP4XX)           += ixp4xx
 193 machine-$(CONFIG_ARCH_KEYSTONE)         += keystone
 194 machine-$(CONFIG_ARCH_LPC18XX)          += lpc18xx
 195 machine-$(CONFIG_ARCH_LPC32XX)          += lpc32xx
 196 machine-$(CONFIG_ARCH_MESON)            += meson
 197 machine-$(CONFIG_ARCH_MMP)              += mmp
 198 machine-$(CONFIG_ARCH_MV78XX0)          += mv78xx0
 199 machine-$(CONFIG_ARCH_MVEBU)            += mvebu
 200 machine-$(CONFIG_ARCH_MXC)              += imx
 201 machine-$(CONFIG_ARCH_MEDIATEK)         += mediatek
 202 machine-$(CONFIG_ARCH_MILBEAUT)         += milbeaut
 203 machine-$(CONFIG_ARCH_MXS)              += mxs
 204 machine-$(CONFIG_ARCH_MSTARV7)          += mstar
 205 machine-$(CONFIG_ARCH_NOMADIK)          += nomadik
 206 machine-$(CONFIG_ARCH_NPCM)             += npcm
 207 machine-$(CONFIG_ARCH_OMAP1)            += omap1
 208 machine-$(CONFIG_ARCH_OMAP2PLUS)        += omap2
 209 machine-$(CONFIG_ARCH_ORION5X)          += orion5x
 210 machine-$(CONFIG_ARCH_PXA)              += pxa
 211 machine-$(CONFIG_ARCH_QCOM)             += qcom
 212 machine-$(CONFIG_ARCH_REALTEK)          += realtek
 213 machine-$(CONFIG_ARCH_ROCKCHIP)         += rockchip
 214 machine-$(CONFIG_ARCH_RPC)              += rpc
 215 machine-$(CONFIG_PLAT_SAMSUNG)          += s3c
 216 machine-$(CONFIG_ARCH_S5PV210)          += s5pv210
 217 machine-$(CONFIG_ARCH_SA1100)           += sa1100
 218 machine-$(CONFIG_ARCH_RENESAS)          += shmobile
 219 machine-$(CONFIG_ARCH_INTEL_SOCFPGA)    += socfpga
 220 machine-$(CONFIG_ARCH_STI)              += sti
 221 machine-$(CONFIG_ARCH_STM32)            += stm32
 222 machine-$(CONFIG_ARCH_SUNXI)            += sunxi
 223 machine-$(CONFIG_ARCH_TEGRA)            += tegra
 224 machine-$(CONFIG_ARCH_U8500)            += ux500
 225 machine-$(CONFIG_ARCH_VT8500)           += vt8500
 226 machine-$(CONFIG_ARCH_ZYNQ)             += zynq
 227 machine-$(CONFIG_PLAT_VERSATILE)        += versatile
 228 machine-$(CONFIG_PLAT_SPEAR)            += spear
 229
 230 # legacy platforms provide their own mach/*.h headers globally,
 231 # these three are mutually exclusive
 232 machdirs-$(CONFIG_ARCH_FOOTBRIDGE)      += arch/arm/mach-footbridge
 233 machdirs-$(CONFIG_ARCH_RPC)             += arch/arm/mach-rpc
 234 machdirs-$(CONFIG_ARCH_SA1100)          += arch/arm/mach-sa1100
 235 KBUILD_CPPFLAGS += $(patsubst %,-I$(srctree)/%/include,$(machdirs-y))
 236
 237 # The byte offset of the kernel image in RAM from the start of RAM.
 238 TEXT_OFFSET := $(textofs-y)
 239
 240 export  TEXT_OFFSET GZFLAGS MMUEXT
 241
 242 # If we have a machine-specific directory, then include it in the build.
 243 core-y                          += $(patsubst %,arch/arm/mach-%/,$(machine-y))
 244 # For cleaning
 245 core-                           += $(patsubst %,arch/arm/mach-%/,$(machine-))
 246
 247 core-$(CONFIG_PLAT_ORION)       += arch/arm/plat-orion/
 248
 249 libs-y                          := arch/arm/lib/ $(libs-y)
 250
 251 # Default target when executing plain make
 252 boot := arch/arm/boot
 253 ifeq ($(CONFIG_XIP_KERNEL),y)
 254 KBUILD_IMAGE := $(boot)/xipImage
 255 else
 256 KBUILD_IMAGE := $(boot)/zImage
 257 endif
 258
 259 ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y)
 260 prepare: stack_protector_prepare
 261 ifeq ($(CONFIG_CC_HAVE_STACKPROTECTOR_TLS),y)
 262 stack_protector_prepare: prepare0
 263         $(eval KBUILD_CFLAGS += \
 264                 -mstack-protector-guard=tls \
 265                 -mstack-protector-guard-offset=$(shell  \
 266                         awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}'\
 267                                 $(objtree)/include/generated/asm-offsets.h))
 268 else
 269 stack_protector_prepare: prepare0
 270         $(eval SSP_PLUGIN_CFLAGS := \
 271                 -fplugin-arg-arm_ssp_per_task_plugin-offset=$(shell     \
 272                         awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}'\
 273                                 $(objtree)/include/generated/asm-offsets.h))
 274         $(eval KBUILD_CFLAGS += $(SSP_PLUGIN_CFLAGS))
 275         $(eval GCC_PLUGINS_CFLAGS += $(SSP_PLUGIN_CFLAGS))
 276 endif
 277 endif
 278
 279 all:    $(notdir $(KBUILD_IMAGE))
 280
 281
 282 archheaders:
 283         $(Q)$(MAKE) $(build)=arch/arm/tools uapi
 284
 285 archprepare:
 286         $(Q)$(MAKE) $(build)=arch/arm/tools kapi
 287
 288 # Convert bzImage to zImage
 289 bzImage: zImage
 290
 291 BOOT_TARGETS    = zImage Image xipImage bootpImage uImage
 292 INSTALL_TARGETS = zinstall uinstall install
 293
 294 PHONY += bzImage $(BOOT_TARGETS) $(INSTALL_TARGETS)
 295
 296 bootpImage uImage: zImage
 297 zImage: Image
 298
 299 $(BOOT_TARGETS): vmlinux
 300         $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 301         @$(kecho) '  Kernel: $(boot)/$@ is ready'
 302
 303 $(INSTALL_TARGETS): KBUILD_IMAGE = $(boot)/$(patsubst %install,%Image,$@)
 304 $(INSTALL_TARGETS):
 305         $(call cmd,install)
 306
 307 vdso-install-$(CONFIG_VDSO) += arch/arm/vdso/vdso.so.dbg
 308
 309 # My testing targets (bypasses dependencies)
 310 bp:;    $(Q)$(MAKE) $(build)=$(boot) $(boot)/bootpImage
 311
 312 include $(srctree)/scripts/Makefile.defconf
 313 PHONY += multi_v7_lpae_defconfig
 314 multi_v7_lpae_defconfig:
 315         $(call merge_into_defconfig,multi_v7_defconfig,lpae)
 316
 317 define archhelp
 318   echo  '* zImage        - Compressed kernel image (arch/$(ARCH)/boot/zImage)'
 319   echo  '  Image         - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
 320   echo  '* xipImage      - XIP kernel image, if configured (arch/$(ARCH)/boot/xipImage)'
 321   echo  '  uImage        - U-Boot wrapped zImage'
 322   echo  '  bootpImage    - Combined zImage and initial RAM disk'
 323   echo  '                  (supply initrd image via make variable INITRD=<path>)'
 324   echo  '  install       - Install uncompressed kernel'
 325   echo  '  zinstall      - Install compressed kernel'
 326   echo  '  uinstall      - Install U-Boot wrapped compressed kernel'
 327   echo  '                  Install using (your) ~/bin/$(INSTALLKERNEL) or'
 328   echo  '                  (distribution) /sbin/$(INSTALLKERNEL) or'
 329   echo  '                  install to $$(INSTALL_PATH) and run lilo'
 330   echo
 331   echo  '  multi_v7_lpae_defconfig     - multi_v7_defconfig with CONFIG_ARM_LPAE enabled'
 332 endef