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   += $(call cc-option,-fno-ipa-sra)
  61
  62 # This selects which instruction set is used.
  63 # Note that GCC does not numerically define an architecture version
  64 # macro, but instead defines a whole series of macros which makes
  65 # testing for a specific architecture or later rather impossible.
  66 arch-$(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 ($(CONFIG_CC_IS_CLANG),y)
 116 CFLAGS_ABI      += -meabi gnu
 117 endif
 118
 119 ifeq ($(CONFIG_CURRENT_POINTER_IN_TPIDRURO),y)
 120 CFLAGS_ABI      += -mtp=cp15
 121 endif
 122
 123 # Accept old syntax despite ".syntax unified"
 124 AFLAGS_NOWARN   :=$(call as-option,-Wa$(comma)-mno-warn-deprecated,-Wa$(comma)-W)
 125
 126 ifeq ($(CONFIG_THUMB2_KERNEL),y)
 127 CFLAGS_ISA      :=-mthumb -Wa,-mimplicit-it=always $(AFLAGS_NOWARN)
 128 AFLAGS_ISA      :=$(CFLAGS_ISA) -Wa$(comma)-mthumb
 129 else
 130 CFLAGS_ISA      :=$(call cc-option,-marm,) $(AFLAGS_NOWARN)
 131 AFLAGS_ISA      :=$(CFLAGS_ISA)
 132 endif
 133
 134 # Need -Uarm for gcc < 3.x
 135 KBUILD_CFLAGS   +=$(CFLAGS_ABI) $(CFLAGS_ISA) $(arch-y) $(tune-y) $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,)) -msoft-float -Uarm
 136 KBUILD_AFLAGS   +=$(CFLAGS_ABI) $(AFLAGS_ISA) $(arch-y) $(tune-y) -include asm/unified.h -msoft-float
 137
 138 CHECKFLAGS      += -D__arm__
 139
 140 #Default value
 141 head-y          := arch/arm/kernel/head$(MMUEXT).o
 142
 143 # Text offset. This list is sorted numerically by address in order to
 144 # provide a means to avoid/resolve conflicts in multi-arch kernels.
 145 # Note: the 32kB below this value is reserved for use by the kernel
 146 # during boot, and this offset is critical to the functioning of
 147 # kexec-tools.
 148 textofs-y       := 0x00008000
 149 # We don't want the htc bootloader to corrupt kernel during resume
 150 textofs-$(CONFIG_PM_H1940)      := 0x00108000
 151 # RTD1195 has Boot ROM at start of address space
 152 textofs-$(CONFIG_ARCH_REALTEK)  := 0x00108000
 153 # SA1111 DMA bug: we don't want the kernel to live in precious DMA-able memory
 154 ifeq ($(CONFIG_ARCH_SA1100),y)
 155 textofs-$(CONFIG_SA1111) := 0x00208000
 156 endif
 157 textofs-$(CONFIG_ARCH_IPQ40XX) := 0x00208000
 158 textofs-$(CONFIG_ARCH_MSM8X60) := 0x00208000
 159 textofs-$(CONFIG_ARCH_MSM8960) := 0x00208000
 160 textofs-$(CONFIG_ARCH_MESON) := 0x00208000
 161 textofs-$(CONFIG_ARCH_AXXIA) := 0x00308000
 162
 163 # Machine directory name.  This list is sorted alphanumerically
 164 # by CONFIG_* macro name.
 165 machine-$(CONFIG_ARCH_ACTIONS)          += actions
 166 machine-$(CONFIG_ARCH_AIROHA)           += airoha
 167 machine-$(CONFIG_ARCH_ALPINE)           += alpine
 168 machine-$(CONFIG_ARCH_ARTPEC)           += artpec
 169 machine-$(CONFIG_ARCH_ASPEED)           += aspeed
 170 machine-$(CONFIG_ARCH_AT91)             += at91
 171 machine-$(CONFIG_ARCH_AXXIA)            += axxia
 172 machine-$(CONFIG_ARCH_BCM)              += bcm
 173 machine-$(CONFIG_ARCH_BERLIN)           += berlin
 174 machine-$(CONFIG_ARCH_CLPS711X)         += clps711x
 175 machine-$(CONFIG_ARCH_CNS3XXX)          += cns3xxx
 176 machine-$(CONFIG_ARCH_DAVINCI)          += davinci
 177 machine-$(CONFIG_ARCH_DIGICOLOR)        += digicolor
 178 machine-$(CONFIG_ARCH_DOVE)             += dove
 179 machine-$(CONFIG_ARCH_EP93XX)           += ep93xx
 180 machine-$(CONFIG_ARCH_EXYNOS)           += exynos
 181 machine-$(CONFIG_ARCH_FOOTBRIDGE)       += footbridge
 182 machine-$(CONFIG_ARCH_GEMINI)           += gemini
 183 machine-$(CONFIG_ARCH_HIGHBANK)         += highbank
 184 machine-$(CONFIG_ARCH_HISI)             += hisi
 185 machine-$(CONFIG_ARCH_HPE)              += hpe
 186 machine-$(CONFIG_ARCH_IOP32X)           += iop32x
 187 machine-$(CONFIG_ARCH_IXP4XX)           += ixp4xx
 188 machine-$(CONFIG_ARCH_KEYSTONE)         += keystone
 189 machine-$(CONFIG_ARCH_LPC18XX)          += lpc18xx
 190 machine-$(CONFIG_ARCH_LPC32XX)          += lpc32xx
 191 machine-$(CONFIG_ARCH_MESON)            += meson
 192 machine-$(CONFIG_ARCH_MMP)              += mmp
 193 machine-$(CONFIG_ARCH_MOXART)           += moxart
 194 machine-$(CONFIG_ARCH_MV78XX0)          += mv78xx0
 195 machine-$(CONFIG_ARCH_MVEBU)            += mvebu
 196 machine-$(CONFIG_ARCH_MXC)              += imx
 197 machine-$(CONFIG_ARCH_MEDIATEK)         += mediatek
 198 machine-$(CONFIG_ARCH_MILBEAUT)         += milbeaut
 199 machine-$(CONFIG_ARCH_MXS)              += mxs
 200 machine-$(CONFIG_ARCH_MSTARV7)          += mstar
 201 machine-$(CONFIG_ARCH_NOMADIK)          += nomadik
 202 machine-$(CONFIG_ARCH_NPCM)             += npcm
 203 machine-$(CONFIG_ARCH_NSPIRE)           += nspire
 204 machine-$(CONFIG_ARCH_OXNAS)            += oxnas
 205 machine-$(CONFIG_ARCH_OMAP1)            += omap1
 206 machine-$(CONFIG_ARCH_OMAP2PLUS)        += omap2
 207 machine-$(CONFIG_ARCH_ORION5X)          += orion5x
 208 machine-$(CONFIG_ARCH_PXA)              += pxa
 209 machine-$(CONFIG_ARCH_QCOM)             += qcom
 210 machine-$(CONFIG_ARCH_RDA)              += rda
 211 machine-$(CONFIG_ARCH_REALTEK)          += realtek
 212 machine-$(CONFIG_ARCH_ROCKCHIP)         += rockchip
 213 machine-$(CONFIG_ARCH_RPC)              += rpc
 214 machine-$(CONFIG_PLAT_SAMSUNG)          += s3c
 215 machine-$(CONFIG_ARCH_S5PV210)          += s5pv210
 216 machine-$(CONFIG_ARCH_SA1100)           += sa1100
 217 machine-$(CONFIG_ARCH_RENESAS)          += shmobile
 218 machine-$(CONFIG_ARCH_INTEL_SOCFPGA)    += socfpga
 219 machine-$(CONFIG_ARCH_STI)              += sti
 220 machine-$(CONFIG_ARCH_STM32)            += stm32
 221 machine-$(CONFIG_ARCH_SUNPLUS)          += sunplus
 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                                 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                                 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         $(call cmd,install)
 306
 307 PHONY += vdso_install
 308 vdso_install:
 309 ifeq ($(CONFIG_VDSO),y)
 310         $(Q)$(MAKE) $(build)=arch/arm/vdso $@
 311 endif
 312
 313 # My testing targets (bypasses dependencies)
 314 bp:;    $(Q)$(MAKE) $(build)=$(boot) $(boot)/bootpImage
 315
 316
 317 define archhelp
 318   echo  '* zImage        - Compressed kernel image (arch/$(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 $$(INSTALL_PATH) and run lilo'
 330   echo  '  vdso_install  - Install unstripped vdso.so to $$(INSTALL_MOD_PATH)/vdso'
 331 endef