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 64arch-$(CONFIG_CPU_32v7) =-D__LINUX_ARM_ARCH__=7 -march=armv7-a 65arch-$(CONFIG_CPU_32v6) =-D__LINUX_ARM_ARCH__=6 -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 -march=armv6k 70endif 71arch-$(CONFIG_CPU_32v5) =-D__LINUX_ARM_ARCH__=5 -march=armv5te 72arch-$(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-$(CONFIG_CPU_ARM946E) =-mtune=arm9e 86tune-$(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-$(CONFIG_CPU_XSCALE) =-mtune=xscale 94tune-$(CONFIG_CPU_XSC3) =-mtune=xscale 95tune-$(CONFIG_CPU_FEROCEON) =-mtune=xscale 96tune-$(CONFIG_CPU_V6) =-mtune=arm1136j-s 97tune-$(CONFIG_CPU_V6K) =-mtune=arm1136j-s 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 ($(CONFIG_CC_IS_CLANG),y) 113CFLAGS_ABI += -meabi gnu 114endif 115 116ifeq ($(CONFIG_CURRENT_POINTER_IN_TPIDRURO),y) 117CFLAGS_ABI += -mtp=cp15 118endif 119 120# Accept old syntax despite ".syntax unified" 121AFLAGS_NOWARN :=$(call as-option,-Wa$(comma)-mno-warn-deprecated,-Wa$(comma)-W) 122 123ifeq ($(CONFIG_THUMB2_KERNEL),y) 124CFLAGS_ISA :=-mthumb -Wa,-mimplicit-it=always $(AFLAGS_NOWARN) 125AFLAGS_ISA :=$(CFLAGS_ISA) -Wa$(comma)-mthumb 126else 127CFLAGS_ISA :=$(call cc-option,-marm,) $(AFLAGS_NOWARN) 128AFLAGS_ISA :=$(CFLAGS_ISA) 129endif 130 131# Need -Uarm for gcc < 3.x 132KBUILD_CFLAGS +=$(CFLAGS_ABI) $(CFLAGS_ISA) $(arch-y) $(tune-y) $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,)) -msoft-float -Uarm 133KBUILD_AFLAGS +=$(CFLAGS_ABI) $(AFLAGS_ISA) $(arch-y) $(tune-y) -include asm/unified.h -msoft-float 134 135CHECKFLAGS += -D__arm__ 136 137#Default value 138head-y := arch/arm/kernel/head$(MMUEXT).o 139 140# Text offset. This list is sorted numerically by address in order to 141# provide a means to avoid/resolve conflicts in multi-arch kernels. 142# Note: the 32kB below this value is reserved for use by the kernel 143# during boot, and this offset is critical to the functioning of 144# kexec-tools. 145textofs-y := 0x00008000 146# We don't want the htc bootloader to corrupt kernel during resume 147textofs-$(CONFIG_PM_H1940) := 0x00108000 148# RTD1195 has Boot ROM at start of address space 149textofs-$(CONFIG_ARCH_REALTEK) := 0x00108000 150# SA1111 DMA bug: we don't want the kernel to live in precious DMA-able memory 151ifeq ($(CONFIG_ARCH_SA1100),y) 152textofs-$(CONFIG_SA1111) := 0x00208000 153endif 154textofs-$(CONFIG_ARCH_IPQ40XX) := 0x00208000 155textofs-$(CONFIG_ARCH_MSM8X60) := 0x00208000 156textofs-$(CONFIG_ARCH_MSM8960) := 0x00208000 157textofs-$(CONFIG_ARCH_MESON) := 0x00208000 158textofs-$(CONFIG_ARCH_AXXIA) := 0x00308000 159 160# Machine directory name. This list is sorted alphanumerically 161# by CONFIG_* macro name. 162machine-$(CONFIG_ARCH_ACTIONS) += actions 163machine-$(CONFIG_ARCH_AIROHA) += airoha 164machine-$(CONFIG_ARCH_ALPINE) += alpine 165machine-$(CONFIG_ARCH_ARTPEC) += artpec 166machine-$(CONFIG_ARCH_ASPEED) += aspeed 167machine-$(CONFIG_ARCH_AT91) += at91 168machine-$(CONFIG_ARCH_AXXIA) += axxia 169machine-$(CONFIG_ARCH_BCM) += bcm 170machine-$(CONFIG_ARCH_BERLIN) += berlin 171machine-$(CONFIG_ARCH_CLPS711X) += clps711x 172machine-$(CONFIG_ARCH_CNS3XXX) += cns3xxx 173machine-$(CONFIG_ARCH_DAVINCI) += davinci 174machine-$(CONFIG_ARCH_DIGICOLOR) += digicolor 175machine-$(CONFIG_ARCH_DOVE) += dove 176machine-$(CONFIG_ARCH_EP93XX) += ep93xx 177machine-$(CONFIG_ARCH_EXYNOS) += exynos 178machine-$(CONFIG_ARCH_FOOTBRIDGE) += footbridge 179machine-$(CONFIG_ARCH_GEMINI) += gemini 180machine-$(CONFIG_ARCH_HIGHBANK) += highbank 181machine-$(CONFIG_ARCH_HISI) += hisi 182machine-$(CONFIG_ARCH_HPE) += hpe 183machine-$(CONFIG_ARCH_IOP32X) += iop32x 184machine-$(CONFIG_ARCH_IXP4XX) += ixp4xx 185machine-$(CONFIG_ARCH_KEYSTONE) += keystone 186machine-$(CONFIG_ARCH_LPC18XX) += lpc18xx 187machine-$(CONFIG_ARCH_LPC32XX) += lpc32xx 188machine-$(CONFIG_ARCH_MESON) += meson 189machine-$(CONFIG_ARCH_MMP) += mmp 190machine-$(CONFIG_ARCH_MOXART) += moxart 191machine-$(CONFIG_ARCH_MV78XX0) += mv78xx0 192machine-$(CONFIG_ARCH_MVEBU) += mvebu 193machine-$(CONFIG_ARCH_MXC) += imx 194machine-$(CONFIG_ARCH_MEDIATEK) += mediatek 195machine-$(CONFIG_ARCH_MILBEAUT) += milbeaut 196machine-$(CONFIG_ARCH_MXS) += mxs 197machine-$(CONFIG_ARCH_MSTARV7) += mstar 198machine-$(CONFIG_ARCH_NOMADIK) += nomadik 199machine-$(CONFIG_ARCH_NPCM) += npcm 200machine-$(CONFIG_ARCH_NSPIRE) += nspire 201machine-$(CONFIG_ARCH_OXNAS) += oxnas 202machine-$(CONFIG_ARCH_OMAP1) += omap1 203machine-$(CONFIG_ARCH_OMAP2PLUS) += omap2 204machine-$(CONFIG_ARCH_ORION5X) += orion5x 205machine-$(CONFIG_ARCH_PXA) += pxa 206machine-$(CONFIG_ARCH_QCOM) += qcom 207machine-$(CONFIG_ARCH_RDA) += rda 208machine-$(CONFIG_ARCH_REALTEK) += realtek 209machine-$(CONFIG_ARCH_ROCKCHIP) += rockchip 210machine-$(CONFIG_ARCH_RPC) += rpc 211machine-$(CONFIG_PLAT_SAMSUNG) += s3c 212machine-$(CONFIG_ARCH_S5PV210) += s5pv210 213machine-$(CONFIG_ARCH_SA1100) += sa1100 214machine-$(CONFIG_ARCH_RENESAS) += shmobile 215machine-$(CONFIG_ARCH_INTEL_SOCFPGA) += socfpga 216machine-$(CONFIG_ARCH_STI) += sti 217machine-$(CONFIG_ARCH_STM32) += stm32 218machine-$(CONFIG_ARCH_SUNXI) += sunxi 219machine-$(CONFIG_ARCH_TEGRA) += tegra 220machine-$(CONFIG_ARCH_U8500) += ux500 221machine-$(CONFIG_ARCH_VT8500) += vt8500 222machine-$(CONFIG_ARCH_ZYNQ) += zynq 223machine-$(CONFIG_PLAT_VERSATILE) += versatile 224machine-$(CONFIG_PLAT_SPEAR) += spear 225 226# Platform directory name. This list is sorted alphanumerically 227# by CONFIG_* macro name. 228plat-$(CONFIG_PLAT_ORION) += orion 229 230# The byte offset of the kernel image in RAM from the start of RAM. 231TEXT_OFFSET := $(textofs-y) 232 233# The first directory contains additional information for the boot setup code 234ifneq ($(machine-y),) 235MACHINE := arch/arm/mach-$(word 1,$(machine-y))/ 236else 237MACHINE := 238endif 239ifeq ($(CONFIG_ARCH_MULTIPLATFORM),y) 240MACHINE := 241endif 242 243machdirs := $(patsubst %,arch/arm/mach-%/,$(machine-y)) 244platdirs := $(patsubst %,arch/arm/plat-%/,$(sort $(plat-y))) 245 246ifneq ($(CONFIG_ARCH_MULTIPLATFORM),y) 247ifneq ($(CONFIG_ARM_SINGLE_ARMV7M),y) 248KBUILD_CPPFLAGS += $(patsubst %,-I$(srctree)/%include,$(machdirs) $(platdirs)) 249endif 250endif 251 252export TEXT_OFFSET GZFLAGS MMUEXT 253 254# If we have a machine-specific directory, then include it in the build. 255core-y += $(machdirs) $(platdirs) 256 257# For cleaning 258core- += $(patsubst %,arch/arm/mach-%/, $(machine-)) 259core- += $(patsubst %,arch/arm/plat-%/, $(plat-)) 260 261libs-y := arch/arm/lib/ $(libs-y) 262 263# Default target when executing plain make 264boot := arch/arm/boot 265ifeq ($(CONFIG_XIP_KERNEL),y) 266KBUILD_IMAGE := $(boot)/xipImage 267else 268KBUILD_IMAGE := $(boot)/zImage 269endif 270 271ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y) 272prepare: stack_protector_prepare 273ifeq ($(CONFIG_CC_HAVE_STACKPROTECTOR_TLS),y) 274stack_protector_prepare: prepare0 275 $(eval KBUILD_CFLAGS += \ 276 -mstack-protector-guard=tls \ 277 -mstack-protector-guard-offset=$(shell \ 278 awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}'\ 279 include/generated/asm-offsets.h)) 280else 281stack_protector_prepare: prepare0 282 $(eval SSP_PLUGIN_CFLAGS := \ 283 -fplugin-arg-arm_ssp_per_task_plugin-offset=$(shell \ 284 awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}'\ 285 include/generated/asm-offsets.h)) 286 $(eval KBUILD_CFLAGS += $(SSP_PLUGIN_CFLAGS)) 287 $(eval GCC_PLUGINS_CFLAGS += $(SSP_PLUGIN_CFLAGS)) 288endif 289endif 290 291all: $(notdir $(KBUILD_IMAGE)) 292 293 294archheaders: 295 $(Q)$(MAKE) $(build)=arch/arm/tools uapi 296 297archprepare: 298 $(Q)$(MAKE) $(build)=arch/arm/tools kapi 299 300# Convert bzImage to zImage 301bzImage: zImage 302 303BOOT_TARGETS = zImage Image xipImage bootpImage uImage 304INSTALL_TARGETS = zinstall uinstall install 305 306PHONY += bzImage $(BOOT_TARGETS) $(INSTALL_TARGETS) 307 308bootpImage uImage: zImage 309zImage: Image 310 311$(BOOT_TARGETS): vmlinux 312 $(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/$@ 313 @$(kecho) ' Kernel: $(boot)/$@ is ready' 314 315$(INSTALL_TARGETS): KBUILD_IMAGE = $(boot)/$(patsubst %install,%Image,$@) 316$(INSTALL_TARGETS): 317 $(call cmd,install) 318 319PHONY += vdso_install 320vdso_install: 321ifeq ($(CONFIG_VDSO),y) 322 $(Q)$(MAKE) $(build)=arch/arm/vdso $@ 323endif 324 325# My testing targets (bypasses dependencies) 326bp:; $(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/bootpImage 327 328 329define archhelp 330 echo '* zImage - Compressed kernel image (arch/$(ARCH)/boot/zImage)' 331 echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)' 332 echo '* xipImage - XIP kernel image, if configured (arch/$(ARCH)/boot/xipImage)' 333 echo ' uImage - U-Boot wrapped zImage' 334 echo ' bootpImage - Combined zImage and initial RAM disk' 335 echo ' (supply initrd image via make variable INITRD=<path>)' 336 echo ' install - Install uncompressed kernel' 337 echo ' zinstall - Install compressed kernel' 338 echo ' uinstall - Install U-Boot wrapped compressed kernel' 339 echo ' Install using (your) ~/bin/$(INSTALLKERNEL) or' 340 echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 341 echo ' install to $$(INSTALL_PATH) and run lilo' 342 echo ' vdso_install - Install unstripped vdso.so to $$(INSTALL_MOD_PATH)/vdso' 343endef 344