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# Disable FDPIC ABI 26KBUILD_CFLAGS += $(call cc-option,-mno-fdpic) 27 28# This should work on most of the modern platforms 29KBUILD_DEFCONFIG := multi_v7_defconfig 30 31# defines filename extension depending memory management type. 32ifeq ($(CONFIG_MMU),) 33MMUEXT := -nommu 34KBUILD_CFLAGS += $(call cc-option,-mno-unaligned-access) 35endif 36 37ifeq ($(CONFIG_FRAME_POINTER),y) 38KBUILD_CFLAGS +=-fno-omit-frame-pointer 39ifeq ($(CONFIG_CC_IS_GCC),y) 40KBUILD_CFLAGS += -mapcs -mno-sched-prolog 41endif 42endif 43 44ifeq ($(CONFIG_CPU_BIG_ENDIAN),y) 45KBUILD_CPPFLAGS += -mbig-endian 46CHECKFLAGS += -D__ARMEB__ 47KBUILD_LDFLAGS += -EB 48else 49KBUILD_CPPFLAGS += -mlittle-endian 50CHECKFLAGS += -D__ARMEL__ 51KBUILD_LDFLAGS += -EL 52endif 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# 60KBUILD_CFLAGS += $(call cc-option,-fno-ipa-sra) 61 62# This selects which instruction set is used. 63arch-$(CONFIG_CPU_32v7M) :=-march=armv7-m 64arch-$(CONFIG_CPU_32v7) :=-march=armv7-a 65arch-$(CONFIG_CPU_32v6) :=-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) :=-march=armv6k 70endif 71arch-$(CONFIG_CPU_32v5) :=-march=armv5te 72arch-$(CONFIG_CPU_32v4T) :=-march=armv4t 73arch-$(CONFIG_CPU_32v4) :=-march=armv4 74arch-$(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. 79cpp-$(CONFIG_CPU_32v7M) :=-D__LINUX_ARM_ARCH__=7 80cpp-$(CONFIG_CPU_32v7) :=-D__LINUX_ARM_ARCH__=7 81cpp-$(CONFIG_CPU_32v6) :=-D__LINUX_ARM_ARCH__=6 82# Only override the compiler option if ARMv6. The ARMv6K extensions are 83# always available in ARMv7 84ifeq ($(CONFIG_CPU_32v6),y) 85cpp-$(CONFIG_CPU_32v6K) :=-D__LINUX_ARM_ARCH__=6 86endif 87cpp-$(CONFIG_CPU_32v5) :=-D__LINUX_ARM_ARCH__=5 88cpp-$(CONFIG_CPU_32v4T) :=-D__LINUX_ARM_ARCH__=4 89cpp-$(CONFIG_CPU_32v4) :=-D__LINUX_ARM_ARCH__=4 90cpp-$(CONFIG_CPU_32v3) :=-D__LINUX_ARM_ARCH__=3 91 92# This selects how we optimise for the processor. 93tune-$(CONFIG_CPU_ARM7TDMI) :=-mtune=arm7tdmi 94tune-$(CONFIG_CPU_ARM720T) :=-mtune=arm7tdmi 95tune-$(CONFIG_CPU_ARM740T) :=-mtune=arm7tdmi 96tune-$(CONFIG_CPU_ARM9TDMI) :=-mtune=arm9tdmi 97tune-$(CONFIG_CPU_ARM940T) :=-mtune=arm9tdmi 98tune-$(CONFIG_CPU_ARM946E) :=-mtune=arm9e 99tune-$(CONFIG_CPU_ARM920T) :=-mtune=arm9tdmi 100tune-$(CONFIG_CPU_ARM922T) :=-mtune=arm9tdmi 101tune-$(CONFIG_CPU_ARM925T) :=-mtune=arm9tdmi 102tune-$(CONFIG_CPU_ARM926T) :=-mtune=arm9tdmi 103tune-$(CONFIG_CPU_FA526) :=-mtune=arm9tdmi 104tune-$(CONFIG_CPU_SA110) :=-mtune=strongarm110 105tune-$(CONFIG_CPU_SA1100) :=-mtune=strongarm1100 106tune-$(CONFIG_CPU_XSCALE) :=-mtune=xscale 107tune-$(CONFIG_CPU_XSC3) :=-mtune=xscale 108tune-$(CONFIG_CPU_FEROCEON) :=-mtune=xscale 109tune-$(CONFIG_CPU_V6) :=-mtune=arm1136j-s 110tune-$(CONFIG_CPU_V6K) :=-mtune=arm1136j-s 111 112ifeq ($(CONFIG_AEABI),y) 113CFLAGS_ABI :=-mabi=aapcs-linux -mfpu=vfp 114else 115CFLAGS_ABI :=$(call cc-option,-mapcs-32,-mabi=apcs-gnu) $(call cc-option,-mno-thumb-interwork,) 116endif 117 118ifeq ($(CONFIG_ARM_UNWIND),y) 119CFLAGS_ABI +=-funwind-tables 120endif 121 122ifeq ($(CONFIG_CC_IS_CLANG),y) 123CFLAGS_ABI += -meabi gnu 124endif 125 126ifeq ($(CONFIG_CURRENT_POINTER_IN_TPIDRURO),y) 127KBUILD_CFLAGS += -mtp=cp15 128endif 129 130# Accept old syntax despite ".syntax unified" 131AFLAGS_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) 135CC_FLAGS_FPU := -ffreestanding 136# Enable <arm_neon.h> 137CC_FLAGS_FPU += -isystem $(shell $(CC) -print-file-name=include) 138CC_FLAGS_FPU += -march=armv7-a -mfloat-abi=softfp -mfpu=neon 139 140ifeq ($(CONFIG_THUMB2_KERNEL),y) 141CFLAGS_ISA :=-Wa,-mimplicit-it=always $(AFLAGS_NOWARN) 142AFLAGS_ISA :=$(CFLAGS_ISA) -Wa$(comma)-mthumb 143CFLAGS_ISA +=-mthumb 144else 145CFLAGS_ISA :=$(call cc-option,-marm,) $(AFLAGS_NOWARN) 146AFLAGS_ISA :=$(CFLAGS_ISA) 147endif 148 149# Need -Uarm for gcc < 3.x 150KBUILD_CPPFLAGS +=$(cpp-y) 151KBUILD_CFLAGS +=$(CFLAGS_ABI) $(CFLAGS_ISA) $(arch-y) $(tune-y) $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,)) -msoft-float -Uarm 152KBUILD_AFLAGS +=$(CFLAGS_ABI) $(AFLAGS_ISA) -Wa,$(arch-y) $(tune-y) -include asm/unified.h -msoft-float 153 154CHECKFLAGS += -D__arm__ 155 156# Text offset. This list is sorted numerically by address in order to 157# provide a means to avoid/resolve conflicts in multi-arch kernels. 158# Note: the 32kB below this value is reserved for use by the kernel 159# during boot, and this offset is critical to the functioning of 160# kexec-tools. 161textofs-y := 0x00008000 162# RTD1195 has Boot ROM at start of address space 163textofs-$(CONFIG_ARCH_REALTEK) := 0x00108000 164# SA1111 DMA bug: we don't want the kernel to live in precious DMA-able memory 165ifeq ($(CONFIG_ARCH_SA1100),y) 166textofs-$(CONFIG_SA1111) := 0x00208000 167endif 168textofs-$(CONFIG_ARCH_QCOM_RESERVE_SMEM) := 0x00208000 169textofs-$(CONFIG_ARCH_MESON) := 0x00208000 170textofs-$(CONFIG_ARCH_AXXIA) := 0x00308000 171 172# Machine directory name. This list is sorted alphanumerically 173# by CONFIG_* macro name. 174machine-$(CONFIG_ARCH_ACTIONS) += actions 175machine-$(CONFIG_ARCH_ALPINE) += alpine 176machine-$(CONFIG_ARCH_ARTPEC) += artpec 177machine-$(CONFIG_ARCH_ASPEED) += aspeed 178machine-$(CONFIG_ARCH_AT91) += at91 179machine-$(CONFIG_ARCH_AXXIA) += axxia 180machine-$(CONFIG_ARCH_BCM) += bcm 181machine-$(CONFIG_ARCH_BERLIN) += berlin 182machine-$(CONFIG_ARCH_CLPS711X) += clps711x 183machine-$(CONFIG_ARCH_DAVINCI) += davinci 184machine-$(CONFIG_ARCH_DIGICOLOR) += digicolor 185machine-$(CONFIG_ARCH_DOVE) += dove 186machine-$(CONFIG_ARCH_EP93XX) += ep93xx 187machine-$(CONFIG_ARCH_EXYNOS) += exynos 188machine-$(CONFIG_ARCH_FOOTBRIDGE) += footbridge 189machine-$(CONFIG_ARCH_GEMINI) += gemini 190machine-$(CONFIG_ARCH_HIGHBANK) += highbank 191machine-$(CONFIG_ARCH_HISI) += hisi 192machine-$(CONFIG_ARCH_HPE) += hpe 193machine-$(CONFIG_ARCH_IXP4XX) += ixp4xx 194machine-$(CONFIG_ARCH_KEYSTONE) += keystone 195machine-$(CONFIG_ARCH_LPC18XX) += lpc18xx 196machine-$(CONFIG_ARCH_LPC32XX) += lpc32xx 197machine-$(CONFIG_ARCH_MESON) += meson 198machine-$(CONFIG_ARCH_MMP) += mmp 199machine-$(CONFIG_ARCH_MV78XX0) += mv78xx0 200machine-$(CONFIG_ARCH_MVEBU) += mvebu 201machine-$(CONFIG_ARCH_MXC) += imx 202machine-$(CONFIG_ARCH_MEDIATEK) += mediatek 203machine-$(CONFIG_ARCH_MILBEAUT) += milbeaut 204machine-$(CONFIG_ARCH_MXS) += mxs 205machine-$(CONFIG_ARCH_MSTARV7) += mstar 206machine-$(CONFIG_ARCH_NOMADIK) += nomadik 207machine-$(CONFIG_ARCH_NPCM) += npcm 208machine-$(CONFIG_ARCH_OMAP1) += omap1 209machine-$(CONFIG_ARCH_OMAP2PLUS) += omap2 210machine-$(CONFIG_ARCH_ORION5X) += orion5x 211machine-$(CONFIG_ARCH_PXA) += pxa 212machine-$(CONFIG_ARCH_QCOM) += qcom 213machine-$(CONFIG_ARCH_REALTEK) += realtek 214machine-$(CONFIG_ARCH_ROCKCHIP) += rockchip 215machine-$(CONFIG_ARCH_RPC) += rpc 216machine-$(CONFIG_PLAT_SAMSUNG) += s3c 217machine-$(CONFIG_ARCH_S5PV210) += s5pv210 218machine-$(CONFIG_ARCH_SA1100) += sa1100 219machine-$(CONFIG_ARCH_RENESAS) += shmobile 220machine-$(CONFIG_ARCH_INTEL_SOCFPGA) += socfpga 221machine-$(CONFIG_ARCH_STI) += sti 222machine-$(CONFIG_ARCH_STM32) += stm32 223machine-$(CONFIG_ARCH_SUNXI) += sunxi 224machine-$(CONFIG_ARCH_TEGRA) += tegra 225machine-$(CONFIG_ARCH_U8500) += ux500 226machine-$(CONFIG_ARCH_VT8500) += vt8500 227machine-$(CONFIG_ARCH_ZYNQ) += zynq 228machine-$(CONFIG_PLAT_VERSATILE) += versatile 229machine-$(CONFIG_PLAT_SPEAR) += spear 230 231# legacy platforms provide their own mach/*.h headers globally, 232# these three are mutually exclusive 233machdirs-$(CONFIG_ARCH_FOOTBRIDGE) += arch/arm/mach-footbridge 234machdirs-$(CONFIG_ARCH_RPC) += arch/arm/mach-rpc 235machdirs-$(CONFIG_ARCH_SA1100) += arch/arm/mach-sa1100 236KBUILD_CPPFLAGS += $(patsubst %,-I$(srctree)/%/include,$(machdirs-y)) 237 238# The byte offset of the kernel image in RAM from the start of RAM. 239TEXT_OFFSET := $(textofs-y) 240 241export TEXT_OFFSET GZFLAGS MMUEXT 242 243# If we have a machine-specific directory, then include it in the build. 244core-y += $(patsubst %,arch/arm/mach-%/,$(machine-y)) 245# For cleaning 246core- += $(patsubst %,arch/arm/mach-%/,$(machine-)) 247 248core-$(CONFIG_PLAT_ORION) += arch/arm/plat-orion/ 249 250libs-y := arch/arm/lib/ $(libs-y) 251 252# Default target when executing plain make 253boot := arch/arm/boot 254ifeq ($(CONFIG_XIP_KERNEL),y) 255KBUILD_IMAGE := $(boot)/xipImage 256else 257KBUILD_IMAGE := $(boot)/zImage 258endif 259 260ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y) 261prepare: stack_protector_prepare 262ifeq ($(CONFIG_CC_HAVE_STACKPROTECTOR_TLS),y) 263stack_protector_prepare: prepare0 264 $(eval KBUILD_CFLAGS += \ 265 -mstack-protector-guard=tls \ 266 -mstack-protector-guard-offset=$(shell \ 267 awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}'\ 268 include/generated/asm-offsets.h)) 269else 270stack_protector_prepare: prepare0 271 $(eval SSP_PLUGIN_CFLAGS := \ 272 -fplugin-arg-arm_ssp_per_task_plugin-offset=$(shell \ 273 awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}'\ 274 include/generated/asm-offsets.h)) 275 $(eval KBUILD_CFLAGS += $(SSP_PLUGIN_CFLAGS)) 276 $(eval GCC_PLUGINS_CFLAGS += $(SSP_PLUGIN_CFLAGS)) 277endif 278endif 279 280all: $(notdir $(KBUILD_IMAGE)) 281 282 283archheaders: 284 $(Q)$(MAKE) $(build)=arch/arm/tools uapi 285 286archprepare: 287 $(Q)$(MAKE) $(build)=arch/arm/tools kapi 288 289# Convert bzImage to zImage 290bzImage: zImage 291 292BOOT_TARGETS = zImage Image xipImage bootpImage uImage 293INSTALL_TARGETS = zinstall uinstall install 294 295PHONY += bzImage $(BOOT_TARGETS) $(INSTALL_TARGETS) 296 297bootpImage uImage: zImage 298zImage: Image 299 300$(BOOT_TARGETS): vmlinux 301 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 302 @$(kecho) ' Kernel: $(boot)/$@ is ready' 303 304$(INSTALL_TARGETS): KBUILD_IMAGE = $(boot)/$(patsubst %install,%Image,$@) 305$(INSTALL_TARGETS): 306 $(call cmd,install) 307 308vdso-install-$(CONFIG_VDSO) += arch/arm/vdso/vdso.so.dbg 309 310# My testing targets (bypasses dependencies) 311bp:; $(Q)$(MAKE) $(build)=$(boot) $(boot)/bootpImage 312 313include $(srctree)/scripts/Makefile.defconf 314PHONY += multi_v7_lpae_defconfig 315multi_v7_lpae_defconfig: 316 $(call merge_into_defconfig,multi_v7_defconfig,lpae) 317 318define archhelp 319 echo '* zImage - Compressed kernel image (arch/$(ARCH)/boot/zImage)' 320 echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)' 321 echo '* xipImage - XIP kernel image, if configured (arch/$(ARCH)/boot/xipImage)' 322 echo ' uImage - U-Boot wrapped zImage' 323 echo ' bootpImage - Combined zImage and initial RAM disk' 324 echo ' (supply initrd image via make variable INITRD=<path>)' 325 echo ' install - Install uncompressed kernel' 326 echo ' zinstall - Install compressed kernel' 327 echo ' uinstall - Install U-Boot wrapped compressed kernel' 328 echo ' Install using (your) ~/bin/$(INSTALLKERNEL) or' 329 echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 330 echo ' install to $$(INSTALL_PATH) and run lilo' 331 echo 332 echo ' multi_v7_lpae_defconfig - multi_v7_defconfig with CONFIG_ARM_LPAE enabled' 333endef 334