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$(comma)-W) 132 133ifeq ($(CONFIG_THUMB2_KERNEL),y) 134CFLAGS_ISA :=-mthumb -Wa,-mimplicit-it=always $(AFLAGS_NOWARN) 135AFLAGS_ISA :=$(CFLAGS_ISA) -Wa$(comma)-mthumb -D__thumb2__=2 136else 137CFLAGS_ISA :=$(call cc-option,-marm,) $(AFLAGS_NOWARN) 138AFLAGS_ISA :=$(CFLAGS_ISA) 139endif 140 141# Need -Uarm for gcc < 3.x 142KBUILD_CPPFLAGS +=$(cpp-y) 143KBUILD_CFLAGS +=$(CFLAGS_ABI) $(CFLAGS_ISA) $(arch-y) $(tune-y) $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,)) -msoft-float -Uarm 144KBUILD_AFLAGS +=$(CFLAGS_ABI) $(AFLAGS_ISA) -Wa,$(arch-y) $(tune-y) -include asm/unified.h -msoft-float 145 146CHECKFLAGS += -D__arm__ 147 148#Default value 149head-y := arch/arm/kernel/head$(MMUEXT).o 150 151# Text offset. This list is sorted numerically by address in order to 152# provide a means to avoid/resolve conflicts in multi-arch kernels. 153# Note: the 32kB below this value is reserved for use by the kernel 154# during boot, and this offset is critical to the functioning of 155# kexec-tools. 156textofs-y := 0x00008000 157# We don't want the htc bootloader to corrupt kernel during resume 158textofs-$(CONFIG_PM_H1940) := 0x00108000 159# RTD1195 has Boot ROM at start of address space 160textofs-$(CONFIG_ARCH_REALTEK) := 0x00108000 161# SA1111 DMA bug: we don't want the kernel to live in precious DMA-able memory 162ifeq ($(CONFIG_ARCH_SA1100),y) 163textofs-$(CONFIG_SA1111) := 0x00208000 164endif 165textofs-$(CONFIG_ARCH_IPQ40XX) := 0x00208000 166textofs-$(CONFIG_ARCH_MSM8X60) := 0x00208000 167textofs-$(CONFIG_ARCH_MSM8960) := 0x00208000 168textofs-$(CONFIG_ARCH_MESON) := 0x00208000 169textofs-$(CONFIG_ARCH_AXXIA) := 0x00308000 170 171# Machine directory name. This list is sorted alphanumerically 172# by CONFIG_* macro name. 173machine-$(CONFIG_ARCH_ACTIONS) += actions 174machine-$(CONFIG_ARCH_AIROHA) += airoha 175machine-$(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_CNS3XXX) += cns3xxx 184machine-$(CONFIG_ARCH_DAVINCI) += davinci 185machine-$(CONFIG_ARCH_DIGICOLOR) += digicolor 186machine-$(CONFIG_ARCH_DOVE) += dove 187machine-$(CONFIG_ARCH_EP93XX) += ep93xx 188machine-$(CONFIG_ARCH_EXYNOS) += exynos 189machine-$(CONFIG_ARCH_FOOTBRIDGE) += footbridge 190machine-$(CONFIG_ARCH_GEMINI) += gemini 191machine-$(CONFIG_ARCH_HIGHBANK) += highbank 192machine-$(CONFIG_ARCH_HISI) += hisi 193machine-$(CONFIG_ARCH_HPE) += hpe 194machine-$(CONFIG_ARCH_IOP32X) += iop32x 195machine-$(CONFIG_ARCH_IXP4XX) += ixp4xx 196machine-$(CONFIG_ARCH_KEYSTONE) += keystone 197machine-$(CONFIG_ARCH_LPC18XX) += lpc18xx 198machine-$(CONFIG_ARCH_LPC32XX) += lpc32xx 199machine-$(CONFIG_ARCH_MESON) += meson 200machine-$(CONFIG_ARCH_MMP) += mmp 201machine-$(CONFIG_ARCH_MOXART) += moxart 202machine-$(CONFIG_ARCH_MV78XX0) += mv78xx0 203machine-$(CONFIG_ARCH_MVEBU) += mvebu 204machine-$(CONFIG_ARCH_MXC) += imx 205machine-$(CONFIG_ARCH_MEDIATEK) += mediatek 206machine-$(CONFIG_ARCH_MILBEAUT) += milbeaut 207machine-$(CONFIG_ARCH_MXS) += mxs 208machine-$(CONFIG_ARCH_MSTARV7) += mstar 209machine-$(CONFIG_ARCH_NOMADIK) += nomadik 210machine-$(CONFIG_ARCH_NPCM) += npcm 211machine-$(CONFIG_ARCH_NSPIRE) += nspire 212machine-$(CONFIG_ARCH_OXNAS) += oxnas 213machine-$(CONFIG_ARCH_OMAP1) += omap1 214machine-$(CONFIG_ARCH_OMAP2PLUS) += omap2 215machine-$(CONFIG_ARCH_ORION5X) += orion5x 216machine-$(CONFIG_ARCH_PXA) += pxa 217machine-$(CONFIG_ARCH_QCOM) += qcom 218machine-$(CONFIG_ARCH_RDA) += rda 219machine-$(CONFIG_ARCH_REALTEK) += realtek 220machine-$(CONFIG_ARCH_ROCKCHIP) += rockchip 221machine-$(CONFIG_ARCH_RPC) += rpc 222machine-$(CONFIG_PLAT_SAMSUNG) += s3c 223machine-$(CONFIG_ARCH_S5PV210) += s5pv210 224machine-$(CONFIG_ARCH_SA1100) += sa1100 225machine-$(CONFIG_ARCH_RENESAS) += shmobile 226machine-$(CONFIG_ARCH_INTEL_SOCFPGA) += socfpga 227machine-$(CONFIG_ARCH_STI) += sti 228machine-$(CONFIG_ARCH_STM32) += stm32 229machine-$(CONFIG_ARCH_SUNPLUS) += sunplus 230machine-$(CONFIG_ARCH_SUNXI) += sunxi 231machine-$(CONFIG_ARCH_TEGRA) += tegra 232machine-$(CONFIG_ARCH_U8500) += ux500 233machine-$(CONFIG_ARCH_VT8500) += vt8500 234machine-$(CONFIG_ARCH_ZYNQ) += zynq 235machine-$(CONFIG_PLAT_VERSATILE) += versatile 236machine-$(CONFIG_PLAT_SPEAR) += spear 237 238# Platform directory name. This list is sorted alphanumerically 239# by CONFIG_* macro name. 240plat-$(CONFIG_PLAT_ORION) += orion 241 242# The byte offset of the kernel image in RAM from the start of RAM. 243TEXT_OFFSET := $(textofs-y) 244 245# The first directory contains additional information for the boot setup code 246ifneq ($(machine-y),) 247MACHINE := arch/arm/mach-$(word 1,$(machine-y))/ 248else 249MACHINE := 250endif 251ifeq ($(CONFIG_ARCH_MULTIPLATFORM),y) 252MACHINE := 253endif 254 255machdirs := $(patsubst %,arch/arm/mach-%/,$(machine-y)) 256platdirs := $(patsubst %,arch/arm/plat-%/,$(sort $(plat-y))) 257 258ifneq ($(CONFIG_ARCH_MULTIPLATFORM),y) 259ifneq ($(CONFIG_ARM_SINGLE_ARMV7M),y) 260KBUILD_CPPFLAGS += $(patsubst %,-I$(srctree)/%include,$(machdirs) $(platdirs)) 261endif 262endif 263 264export TEXT_OFFSET GZFLAGS MMUEXT 265 266# If we have a machine-specific directory, then include it in the build. 267core-y += $(machdirs) $(platdirs) 268 269# For cleaning 270core- += $(patsubst %,arch/arm/mach-%/, $(machine-)) 271core- += $(patsubst %,arch/arm/plat-%/, $(plat-)) 272 273libs-y := arch/arm/lib/ $(libs-y) 274 275# Default target when executing plain make 276boot := arch/arm/boot 277ifeq ($(CONFIG_XIP_KERNEL),y) 278KBUILD_IMAGE := $(boot)/xipImage 279else 280KBUILD_IMAGE := $(boot)/zImage 281endif 282 283ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y) 284prepare: stack_protector_prepare 285ifeq ($(CONFIG_CC_HAVE_STACKPROTECTOR_TLS),y) 286stack_protector_prepare: prepare0 287 $(eval KBUILD_CFLAGS += \ 288 -mstack-protector-guard=tls \ 289 -mstack-protector-guard-offset=$(shell \ 290 awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}'\ 291 include/generated/asm-offsets.h)) 292else 293stack_protector_prepare: prepare0 294 $(eval SSP_PLUGIN_CFLAGS := \ 295 -fplugin-arg-arm_ssp_per_task_plugin-offset=$(shell \ 296 awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}'\ 297 include/generated/asm-offsets.h)) 298 $(eval KBUILD_CFLAGS += $(SSP_PLUGIN_CFLAGS)) 299 $(eval GCC_PLUGINS_CFLAGS += $(SSP_PLUGIN_CFLAGS)) 300endif 301endif 302 303all: $(notdir $(KBUILD_IMAGE)) 304 305 306archheaders: 307 $(Q)$(MAKE) $(build)=arch/arm/tools uapi 308 309archprepare: 310 $(Q)$(MAKE) $(build)=arch/arm/tools kapi 311 312# Convert bzImage to zImage 313bzImage: zImage 314 315BOOT_TARGETS = zImage Image xipImage bootpImage uImage 316INSTALL_TARGETS = zinstall uinstall install 317 318PHONY += bzImage $(BOOT_TARGETS) $(INSTALL_TARGETS) 319 320bootpImage uImage: zImage 321zImage: Image 322 323$(BOOT_TARGETS): vmlinux 324 $(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/$@ 325 @$(kecho) ' Kernel: $(boot)/$@ is ready' 326 327$(INSTALL_TARGETS): KBUILD_IMAGE = $(boot)/$(patsubst %install,%Image,$@) 328$(INSTALL_TARGETS): 329 $(call cmd,install) 330 331PHONY += vdso_install 332vdso_install: 333ifeq ($(CONFIG_VDSO),y) 334 $(Q)$(MAKE) $(build)=arch/arm/vdso $@ 335endif 336 337# My testing targets (bypasses dependencies) 338bp:; $(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/bootpImage 339 340 341define archhelp 342 echo '* zImage - Compressed kernel image (arch/$(ARCH)/boot/zImage)' 343 echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)' 344 echo '* xipImage - XIP kernel image, if configured (arch/$(ARCH)/boot/xipImage)' 345 echo ' uImage - U-Boot wrapped zImage' 346 echo ' bootpImage - Combined zImage and initial RAM disk' 347 echo ' (supply initrd image via make variable INITRD=<path>)' 348 echo ' install - Install uncompressed kernel' 349 echo ' zinstall - Install compressed kernel' 350 echo ' uinstall - Install U-Boot wrapped compressed kernel' 351 echo ' Install using (your) ~/bin/$(INSTALLKERNEL) or' 352 echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 353 echo ' install to $$(INSTALL_PATH) and run lilo' 354 echo ' vdso_install - Install unstripped vdso.so to $$(INSTALL_MOD_PATH)/vdso' 355endef 356