linux/arch/arm/Makefile
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   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
  13LDFLAGS_vmlinux := --no-undefined -X --pic-veneer -z norelro
  14ifeq ($(CONFIG_CPU_ENDIAN_BE8),y)
  15LDFLAGS_vmlinux += --be8
  16KBUILD_LDFLAGS_MODULE   += --be8
  17endif
  18
  19GZFLAGS         :=-9
  20#KBUILD_CFLAGS  +=-pipe
  21
  22# Never generate .eh_frame
  23KBUILD_CFLAGS   += $(call cc-option,-fno-dwarf2-cfi-asm)
  24
  25# This should work on most of the modern platforms
  26KBUILD_DEFCONFIG := multi_v7_defconfig
  27
  28# defines filename extension depending memory management type.
  29ifeq ($(CONFIG_MMU),)
  30MMUEXT          := -nommu
  31KBUILD_CFLAGS   += $(call cc-option,-mno-unaligned-access)
  32endif
  33
  34ifeq ($(CONFIG_FRAME_POINTER),y)
  35KBUILD_CFLAGS   +=-fno-omit-frame-pointer
  36ifeq ($(CONFIG_CC_IS_GCC),y)
  37KBUILD_CFLAGS += -mapcs -mno-sched-prolog
  38endif
  39endif
  40
  41ifeq ($(CONFIG_CPU_BIG_ENDIAN),y)
  42KBUILD_CPPFLAGS += -mbig-endian
  43CHECKFLAGS      += -D__ARMEB__
  44KBUILD_LDFLAGS  += -EB
  45else
  46KBUILD_CPPFLAGS += -mlittle-endian
  47CHECKFLAGS      += -D__ARMEL__
  48KBUILD_LDFLAGS  += -EL
  49endif
  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#
  57KBUILD_CFLAGS   += $(call cc-option,-fno-ipa-sra)
  58
  59# This selects which instruction set is used.
  60# Note that GCC does not numerically define an architecture version
  61# macro, but instead defines a whole series of macros which makes
  62# testing for a specific architecture or later rather impossible.
  63arch-$(CONFIG_CPU_32v7M)        =-D__LINUX_ARM_ARCH__=7 -march=armv7-m -Wa,-march=armv7-m
  64arch-$(CONFIG_CPU_32v7)         =-D__LINUX_ARM_ARCH__=7 $(call cc-option,-march=armv7-a,-march=armv5t -Wa$(comma)-march=armv7-a)
  65arch-$(CONFIG_CPU_32v6)         =-D__LINUX_ARM_ARCH__=6 $(call cc-option,-march=armv6,-march=armv5t -Wa$(comma)-march=armv6)
  66# Only override the compiler option if ARMv6. The ARMv6K extensions are
  67# always available in ARMv7
  68ifeq ($(CONFIG_CPU_32v6),y)
  69arch-$(CONFIG_CPU_32v6K)        =-D__LINUX_ARM_ARCH__=6 $(call cc-option,-march=armv6k,-march=armv5t -Wa$(comma)-march=armv6k)
  70endif
  71arch-$(CONFIG_CPU_32v5)         =-D__LINUX_ARM_ARCH__=5 $(call cc-option,-march=armv5te,-march=armv4t)
  72arch-$(CONFIG_CPU_32v4T)        =-D__LINUX_ARM_ARCH__=4 -march=armv4t
  73arch-$(CONFIG_CPU_32v4)         =-D__LINUX_ARM_ARCH__=4 -march=armv4
  74arch-$(CONFIG_CPU_32v3)         =-D__LINUX_ARM_ARCH__=3 -march=armv3m
  75
  76# Evaluate arch cc-option calls now
  77arch-y := $(arch-y)
  78
  79# This selects how we optimise for the processor.
  80tune-$(CONFIG_CPU_ARM7TDMI)     =-mtune=arm7tdmi
  81tune-$(CONFIG_CPU_ARM720T)      =-mtune=arm7tdmi
  82tune-$(CONFIG_CPU_ARM740T)      =-mtune=arm7tdmi
  83tune-$(CONFIG_CPU_ARM9TDMI)     =-mtune=arm9tdmi
  84tune-$(CONFIG_CPU_ARM940T)      =-mtune=arm9tdmi
  85tune-$(CONFIG_CPU_ARM946E)      =$(call cc-option,-mtune=arm9e,-mtune=arm9tdmi)
  86tune-$(CONFIG_CPU_ARM920T)      =-mtune=arm9tdmi
  87tune-$(CONFIG_CPU_ARM922T)      =-mtune=arm9tdmi
  88tune-$(CONFIG_CPU_ARM925T)      =-mtune=arm9tdmi
  89tune-$(CONFIG_CPU_ARM926T)      =-mtune=arm9tdmi
  90tune-$(CONFIG_CPU_FA526)        =-mtune=arm9tdmi
  91tune-$(CONFIG_CPU_SA110)        =-mtune=strongarm110
  92tune-$(CONFIG_CPU_SA1100)       =-mtune=strongarm1100
  93tune-$(CONFIG_CPU_XSCALE)       =$(call cc-option,-mtune=xscale,-mtune=strongarm110) -Wa,-mcpu=xscale
  94tune-$(CONFIG_CPU_XSC3)         =$(call cc-option,-mtune=xscale,-mtune=strongarm110) -Wa,-mcpu=xscale
  95tune-$(CONFIG_CPU_FEROCEON)     =$(call cc-option,-mtune=marvell-f,-mtune=xscale)
  96tune-$(CONFIG_CPU_V6)           =$(call cc-option,-mtune=arm1136j-s,-mtune=strongarm)
  97tune-$(CONFIG_CPU_V6K)          =$(call cc-option,-mtune=arm1136j-s,-mtune=strongarm)
  98
  99# Evaluate tune cc-option calls now
 100tune-y := $(tune-y)
 101
 102ifeq ($(CONFIG_AEABI),y)
 103CFLAGS_ABI      :=-mabi=aapcs-linux -mfpu=vfp
 104else
 105CFLAGS_ABI      :=$(call cc-option,-mapcs-32,-mabi=apcs-gnu) $(call cc-option,-mno-thumb-interwork,)
 106endif
 107
 108ifeq ($(CONFIG_ARM_UNWIND),y)
 109CFLAGS_ABI      +=-funwind-tables
 110endif
 111
 112ifeq ($(CONFIG_CC_IS_CLANG),y)
 113CFLAGS_ABI      += -meabi gnu
 114endif
 115
 116# Accept old syntax despite ".syntax unified"
 117AFLAGS_NOWARN   :=$(call as-option,-Wa$(comma)-mno-warn-deprecated,-Wa$(comma)-W)
 118
 119ifeq ($(CONFIG_THUMB2_KERNEL),y)
 120CFLAGS_ISA      :=-mthumb -Wa,-mimplicit-it=always $(AFLAGS_NOWARN)
 121AFLAGS_ISA      :=$(CFLAGS_ISA) -Wa$(comma)-mthumb
 122else
 123CFLAGS_ISA      :=$(call cc-option,-marm,) $(AFLAGS_NOWARN)
 124AFLAGS_ISA      :=$(CFLAGS_ISA)
 125endif
 126
 127# Need -Uarm for gcc < 3.x
 128KBUILD_CFLAGS   +=$(CFLAGS_ABI) $(CFLAGS_ISA) $(arch-y) $(tune-y) $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,)) -msoft-float -Uarm
 129KBUILD_AFLAGS   +=$(CFLAGS_ABI) $(AFLAGS_ISA) $(arch-y) $(tune-y) -include asm/unified.h -msoft-float
 130
 131CHECKFLAGS      += -D__arm__
 132
 133#Default value
 134head-y          := arch/arm/kernel/head$(MMUEXT).o
 135
 136# Text offset. This list is sorted numerically by address in order to
 137# provide a means to avoid/resolve conflicts in multi-arch kernels.
 138# Note: the 32kB below this value is reserved for use by the kernel
 139# during boot, and this offset is critical to the functioning of
 140# kexec-tools.
 141textofs-y       := 0x00008000
 142# We don't want the htc bootloader to corrupt kernel during resume
 143textofs-$(CONFIG_PM_H1940)      := 0x00108000
 144# RTD1195 has Boot ROM at start of address space
 145textofs-$(CONFIG_ARCH_REALTEK)  := 0x00108000
 146# SA1111 DMA bug: we don't want the kernel to live in precious DMA-able memory
 147ifeq ($(CONFIG_ARCH_SA1100),y)
 148textofs-$(CONFIG_SA1111) := 0x00208000
 149endif
 150textofs-$(CONFIG_ARCH_IPQ40XX) := 0x00208000
 151textofs-$(CONFIG_ARCH_MSM8X60) := 0x00208000
 152textofs-$(CONFIG_ARCH_MSM8960) := 0x00208000
 153textofs-$(CONFIG_ARCH_MESON) := 0x00208000
 154textofs-$(CONFIG_ARCH_AXXIA) := 0x00308000
 155
 156# Machine directory name.  This list is sorted alphanumerically
 157# by CONFIG_* macro name.
 158machine-$(CONFIG_ARCH_ACTIONS)          += actions
 159machine-$(CONFIG_ARCH_ALPINE)           += alpine
 160machine-$(CONFIG_ARCH_ARTPEC)           += artpec
 161machine-$(CONFIG_ARCH_ASPEED)           += aspeed
 162machine-$(CONFIG_ARCH_AT91)             += at91
 163machine-$(CONFIG_ARCH_AXXIA)            += axxia
 164machine-$(CONFIG_ARCH_BCM)              += bcm
 165machine-$(CONFIG_ARCH_BERLIN)           += berlin
 166machine-$(CONFIG_ARCH_CLPS711X)         += clps711x
 167machine-$(CONFIG_ARCH_CNS3XXX)          += cns3xxx
 168machine-$(CONFIG_ARCH_DAVINCI)          += davinci
 169machine-$(CONFIG_ARCH_DIGICOLOR)        += digicolor
 170machine-$(CONFIG_ARCH_DOVE)             += dove
 171machine-$(CONFIG_ARCH_EP93XX)           += ep93xx
 172machine-$(CONFIG_ARCH_EXYNOS)           += exynos
 173machine-$(CONFIG_ARCH_FOOTBRIDGE)       += footbridge
 174machine-$(CONFIG_ARCH_GEMINI)           += gemini
 175machine-$(CONFIG_ARCH_HIGHBANK)         += highbank
 176machine-$(CONFIG_ARCH_HISI)             += hisi
 177machine-$(CONFIG_ARCH_INTEGRATOR)       += integrator
 178machine-$(CONFIG_ARCH_IOP32X)           += iop32x
 179machine-$(CONFIG_ARCH_IXP4XX)           += ixp4xx
 180machine-$(CONFIG_ARCH_KEYSTONE)         += keystone
 181machine-$(CONFIG_ARCH_LPC18XX)          += lpc18xx
 182machine-$(CONFIG_ARCH_LPC32XX)          += lpc32xx
 183machine-$(CONFIG_ARCH_MESON)            += meson
 184machine-$(CONFIG_ARCH_MMP)              += mmp
 185machine-$(CONFIG_ARCH_MPS2)             += vexpress
 186machine-$(CONFIG_ARCH_MOXART)           += moxart
 187machine-$(CONFIG_ARCH_MV78XX0)          += mv78xx0
 188machine-$(CONFIG_ARCH_MVEBU)            += mvebu
 189machine-$(CONFIG_ARCH_MXC)              += imx
 190machine-$(CONFIG_ARCH_MEDIATEK)         += mediatek
 191machine-$(CONFIG_ARCH_MILBEAUT)         += milbeaut
 192machine-$(CONFIG_ARCH_MXS)              += mxs
 193machine-$(CONFIG_ARCH_MSTARV7)          += mstar
 194machine-$(CONFIG_ARCH_NOMADIK)          += nomadik
 195machine-$(CONFIG_ARCH_NPCM)             += npcm
 196machine-$(CONFIG_ARCH_NSPIRE)           += nspire
 197machine-$(CONFIG_ARCH_OXNAS)            += oxnas
 198machine-$(CONFIG_ARCH_OMAP1)            += omap1
 199machine-$(CONFIG_ARCH_OMAP2PLUS)        += omap2
 200machine-$(CONFIG_ARCH_ORION5X)          += orion5x
 201machine-$(CONFIG_ARCH_PXA)              += pxa
 202machine-$(CONFIG_ARCH_QCOM)             += qcom
 203machine-$(CONFIG_ARCH_RDA)              += rda
 204machine-$(CONFIG_ARCH_REALTEK)          += realtek
 205machine-$(CONFIG_ARCH_REALVIEW)         += realview
 206machine-$(CONFIG_ARCH_ROCKCHIP)         += rockchip
 207machine-$(CONFIG_ARCH_RPC)              += rpc
 208machine-$(CONFIG_PLAT_SAMSUNG)          += s3c
 209machine-$(CONFIG_ARCH_S5PV210)          += s5pv210
 210machine-$(CONFIG_ARCH_SA1100)           += sa1100
 211machine-$(CONFIG_ARCH_RENESAS)          += shmobile
 212machine-$(CONFIG_ARCH_INTEL_SOCFPGA)    += socfpga
 213machine-$(CONFIG_ARCH_STI)              += sti
 214machine-$(CONFIG_ARCH_STM32)            += stm32
 215machine-$(CONFIG_ARCH_SUNXI)            += sunxi
 216machine-$(CONFIG_ARCH_TEGRA)            += tegra
 217machine-$(CONFIG_ARCH_U8500)            += ux500
 218machine-$(CONFIG_ARCH_VERSATILE)        += versatile
 219machine-$(CONFIG_ARCH_VEXPRESS)         += vexpress
 220machine-$(CONFIG_ARCH_VT8500)           += vt8500
 221machine-$(CONFIG_ARCH_ZYNQ)             += zynq
 222machine-$(CONFIG_PLAT_SPEAR)            += spear
 223
 224# Platform directory name.  This list is sorted alphanumerically
 225# by CONFIG_* macro name.
 226plat-$(CONFIG_ARCH_OMAP)        += omap
 227plat-$(CONFIG_PLAT_ORION)       += orion
 228plat-$(CONFIG_PLAT_PXA)         += pxa
 229plat-$(CONFIG_PLAT_VERSATILE)   += versatile
 230
 231# The byte offset of the kernel image in RAM from the start of RAM.
 232TEXT_OFFSET := $(textofs-y)
 233
 234# The first directory contains additional information for the boot setup code
 235ifneq ($(machine-y),)
 236MACHINE  := arch/arm/mach-$(word 1,$(machine-y))/
 237else
 238MACHINE  :=
 239endif
 240ifeq ($(CONFIG_ARCH_MULTIPLATFORM),y)
 241MACHINE  :=
 242endif
 243
 244machdirs := $(patsubst %,arch/arm/mach-%/,$(machine-y))
 245platdirs := $(patsubst %,arch/arm/plat-%/,$(sort $(plat-y)))
 246
 247ifneq ($(CONFIG_ARCH_MULTIPLATFORM),y)
 248ifneq ($(CONFIG_ARM_SINGLE_ARMV7M),y)
 249KBUILD_CPPFLAGS += $(patsubst %,-I$(srctree)/%include,$(machdirs) $(platdirs))
 250endif
 251endif
 252
 253export  TEXT_OFFSET GZFLAGS MMUEXT
 254
 255core-y                          += arch/arm/
 256# If we have a machine-specific directory, then include it in the build.
 257core-y                          += $(machdirs) $(platdirs)
 258
 259# For cleaning
 260core-                           += $(patsubst %,arch/arm/mach-%/, $(machine-))
 261core-                           += $(patsubst %,arch/arm/plat-%/, $(plat-))
 262
 263libs-y                          := arch/arm/lib/ $(libs-y)
 264
 265# Default target when executing plain make
 266boot := arch/arm/boot
 267ifeq ($(CONFIG_XIP_KERNEL),y)
 268KBUILD_IMAGE := $(boot)/xipImage
 269else
 270KBUILD_IMAGE := $(boot)/zImage
 271endif
 272
 273ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y)
 274prepare: stack_protector_prepare
 275stack_protector_prepare: prepare0
 276        $(eval SSP_PLUGIN_CFLAGS := \
 277                -fplugin-arg-arm_ssp_per_task_plugin-tso=$(shell        \
 278                        awk '{if ($$2 == "THREAD_SZ_ORDER") print $$3;}'\
 279                                include/generated/asm-offsets.h)        \
 280                -fplugin-arg-arm_ssp_per_task_plugin-offset=$(shell     \
 281                        awk '{if ($$2 == "TI_STACK_CANARY") print $$3;}'\
 282                                include/generated/asm-offsets.h))
 283        $(eval KBUILD_CFLAGS += $(SSP_PLUGIN_CFLAGS))
 284        $(eval GCC_PLUGINS_CFLAGS += $(SSP_PLUGIN_CFLAGS))
 285endif
 286
 287all:    $(notdir $(KBUILD_IMAGE))
 288
 289
 290archheaders:
 291        $(Q)$(MAKE) $(build)=arch/arm/tools uapi
 292
 293archprepare:
 294        $(Q)$(MAKE) $(build)=arch/arm/tools kapi
 295
 296# Convert bzImage to zImage
 297bzImage: zImage
 298
 299BOOT_TARGETS    = zImage Image xipImage bootpImage uImage
 300INSTALL_TARGETS = zinstall uinstall install
 301
 302PHONY += bzImage $(BOOT_TARGETS) $(INSTALL_TARGETS)
 303
 304bootpImage uImage: zImage
 305zImage: Image
 306
 307$(BOOT_TARGETS): vmlinux
 308        $(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/$@
 309        @$(kecho) '  Kernel: $(boot)/$@ is ready'
 310
 311$(INSTALL_TARGETS):
 312        $(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $@
 313
 314PHONY += vdso_install
 315vdso_install:
 316ifeq ($(CONFIG_VDSO),y)
 317        $(Q)$(MAKE) $(build)=arch/arm/vdso $@
 318endif
 319
 320# We use MRPROPER_FILES and CLEAN_FILES now
 321archclean:
 322        $(Q)$(MAKE) $(clean)=$(boot)
 323
 324# My testing targets (bypasses dependencies)
 325bp:;    $(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/bootpImage
 326
 327
 328define archhelp
 329  echo  '* zImage        - Compressed kernel image (arch/$(ARCH)/boot/zImage)'
 330  echo  '  Image         - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
 331  echo  '* xipImage      - XIP kernel image, if configured (arch/$(ARCH)/boot/xipImage)'
 332  echo  '  uImage        - U-Boot wrapped zImage'
 333  echo  '  bootpImage    - Combined zImage and initial RAM disk'
 334  echo  '                  (supply initrd image via make variable INITRD=<path>)'
 335  echo  '  install       - Install uncompressed kernel'
 336  echo  '  zinstall      - Install compressed kernel'
 337  echo  '  uinstall      - Install U-Boot wrapped compressed kernel'
 338  echo  '                  Install using (your) ~/bin/$(INSTALLKERNEL) or'
 339  echo  '                  (distribution) /sbin/$(INSTALLKERNEL) or'
 340  echo  '                  install to $$(INSTALL_PATH) and run lilo'
 341  echo  '  vdso_install  - Install unstripped vdso.so to $$(INSTALL_MOD_PATH)/vdso'
 342endef
 343