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 += $(call cc-option,-fno-ipa-sra) 61 62# This selects which instruction set is used. 63# Note that GCC does not numerically define an architecture version 64# macro, but instead defines a whole series of macros which makes 65# testing for a specific architecture or later rather impossible. 66arch-$(CONFIG_CPU_32v7M) =-D__LINUX_ARM_ARCH__=7 -march=armv7-m 67arch-$(CONFIG_CPU_32v7) =-D__LINUX_ARM_ARCH__=7 -march=armv7-a 68arch-$(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 71ifeq ($(CONFIG_CPU_32v6),y) 72arch-$(CONFIG_CPU_32v6K) =-D__LINUX_ARM_ARCH__=6 -march=armv6k 73endif 74arch-$(CONFIG_CPU_32v5) =-D__LINUX_ARM_ARCH__=5 -march=armv5te 75arch-$(CONFIG_CPU_32v4T) =-D__LINUX_ARM_ARCH__=4 -march=armv4t 76arch-$(CONFIG_CPU_32v4) =-D__LINUX_ARM_ARCH__=4 -march=armv4 77arch-$(CONFIG_CPU_32v3) =-D__LINUX_ARM_ARCH__=3 -march=armv3m 78 79# Evaluate arch cc-option calls now 80arch-y := $(arch-y) 81 82# This selects how we optimise for the processor. 83tune-$(CONFIG_CPU_ARM7TDMI) =-mtune=arm7tdmi 84tune-$(CONFIG_CPU_ARM720T) =-mtune=arm7tdmi 85tune-$(CONFIG_CPU_ARM740T) =-mtune=arm7tdmi 86tune-$(CONFIG_CPU_ARM9TDMI) =-mtune=arm9tdmi 87tune-$(CONFIG_CPU_ARM940T) =-mtune=arm9tdmi 88tune-$(CONFIG_CPU_ARM946E) =-mtune=arm9e 89tune-$(CONFIG_CPU_ARM920T) =-mtune=arm9tdmi 90tune-$(CONFIG_CPU_ARM922T) =-mtune=arm9tdmi 91tune-$(CONFIG_CPU_ARM925T) =-mtune=arm9tdmi 92tune-$(CONFIG_CPU_ARM926T) =-mtune=arm9tdmi 93tune-$(CONFIG_CPU_FA526) =-mtune=arm9tdmi 94tune-$(CONFIG_CPU_SA110) =-mtune=strongarm110 95tune-$(CONFIG_CPU_SA1100) =-mtune=strongarm1100 96tune-$(CONFIG_CPU_XSCALE) =-mtune=xscale 97tune-$(CONFIG_CPU_XSC3) =-mtune=xscale 98tune-$(CONFIG_CPU_FEROCEON) =-mtune=xscale 99tune-$(CONFIG_CPU_V6) =-mtune=arm1136j-s 100tune-$(CONFIG_CPU_V6K) =-mtune=arm1136j-s 101 102# Evaluate tune cc-option calls now 103tune-y := $(tune-y) 104 105ifeq ($(CONFIG_AEABI),y) 106CFLAGS_ABI :=-mabi=aapcs-linux -mfpu=vfp 107else 108CFLAGS_ABI :=$(call cc-option,-mapcs-32,-mabi=apcs-gnu) $(call cc-option,-mno-thumb-interwork,) 109endif 110 111ifeq ($(CONFIG_ARM_UNWIND),y) 112CFLAGS_ABI +=-funwind-tables 113endif 114 115ifeq ($(CONFIG_CC_IS_CLANG),y) 116CFLAGS_ABI += -meabi gnu 117endif 118 119ifeq ($(CONFIG_CURRENT_POINTER_IN_TPIDRURO),y) 120CFLAGS_ABI += -mtp=cp15 121endif 122 123# Accept old syntax despite ".syntax unified" 124AFLAGS_NOWARN :=$(call as-option,-Wa$(comma)-mno-warn-deprecated,-Wa$(comma)-W) 125 126ifeq ($(CONFIG_THUMB2_KERNEL),y) 127CFLAGS_ISA :=-mthumb -Wa,-mimplicit-it=always $(AFLAGS_NOWARN) 128AFLAGS_ISA :=$(CFLAGS_ISA) -Wa$(comma)-mthumb 129else 130CFLAGS_ISA :=$(call cc-option,-marm,) $(AFLAGS_NOWARN) 131AFLAGS_ISA :=$(CFLAGS_ISA) 132endif 133 134# Need -Uarm for gcc < 3.x 135KBUILD_CFLAGS +=$(CFLAGS_ABI) $(CFLAGS_ISA) $(arch-y) $(tune-y) $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,)) -msoft-float -Uarm 136KBUILD_AFLAGS +=$(CFLAGS_ABI) $(AFLAGS_ISA) $(arch-y) $(tune-y) -include asm/unified.h -msoft-float 137 138CHECKFLAGS += -D__arm__ 139 140#Default value 141head-y := arch/arm/kernel/head$(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. 148textofs-y := 0x00008000 149# We don't want the htc bootloader to corrupt kernel during resume 150textofs-$(CONFIG_PM_H1940) := 0x00108000 151# RTD1195 has Boot ROM at start of address space 152textofs-$(CONFIG_ARCH_REALTEK) := 0x00108000 153# SA1111 DMA bug: we don't want the kernel to live in precious DMA-able memory 154ifeq ($(CONFIG_ARCH_SA1100),y) 155textofs-$(CONFIG_SA1111) := 0x00208000 156endif 157textofs-$(CONFIG_ARCH_IPQ40XX) := 0x00208000 158textofs-$(CONFIG_ARCH_MSM8X60) := 0x00208000 159textofs-$(CONFIG_ARCH_MSM8960) := 0x00208000 160textofs-$(CONFIG_ARCH_MESON) := 0x00208000 161textofs-$(CONFIG_ARCH_AXXIA) := 0x00308000 162 163# Machine directory name. This list is sorted alphanumerically 164# by CONFIG_* macro name. 165machine-$(CONFIG_ARCH_ACTIONS) += actions 166machine-$(CONFIG_ARCH_AIROHA) += airoha 167machine-$(CONFIG_ARCH_ALPINE) += alpine 168machine-$(CONFIG_ARCH_ARTPEC) += artpec 169machine-$(CONFIG_ARCH_ASPEED) += aspeed 170machine-$(CONFIG_ARCH_AT91) += at91 171machine-$(CONFIG_ARCH_AXXIA) += axxia 172machine-$(CONFIG_ARCH_BCM) += bcm 173machine-$(CONFIG_ARCH_BERLIN) += berlin 174machine-$(CONFIG_ARCH_CLPS711X) += clps711x 175machine-$(CONFIG_ARCH_CNS3XXX) += cns3xxx 176machine-$(CONFIG_ARCH_DAVINCI) += davinci 177machine-$(CONFIG_ARCH_DIGICOLOR) += digicolor 178machine-$(CONFIG_ARCH_DOVE) += dove 179machine-$(CONFIG_ARCH_EP93XX) += ep93xx 180machine-$(CONFIG_ARCH_EXYNOS) += exynos 181machine-$(CONFIG_ARCH_FOOTBRIDGE) += footbridge 182machine-$(CONFIG_ARCH_GEMINI) += gemini 183machine-$(CONFIG_ARCH_HIGHBANK) += highbank 184machine-$(CONFIG_ARCH_HISI) += hisi 185machine-$(CONFIG_ARCH_HPE) += hpe 186machine-$(CONFIG_ARCH_IOP32X) += iop32x 187machine-$(CONFIG_ARCH_IXP4XX) += ixp4xx 188machine-$(CONFIG_ARCH_KEYSTONE) += keystone 189machine-$(CONFIG_ARCH_LPC18XX) += lpc18xx 190machine-$(CONFIG_ARCH_LPC32XX) += lpc32xx 191machine-$(CONFIG_ARCH_MESON) += meson 192machine-$(CONFIG_ARCH_MMP) += mmp 193machine-$(CONFIG_ARCH_MOXART) += moxart 194machine-$(CONFIG_ARCH_MV78XX0) += mv78xx0 195machine-$(CONFIG_ARCH_MVEBU) += mvebu 196machine-$(CONFIG_ARCH_MXC) += imx 197machine-$(CONFIG_ARCH_MEDIATEK) += mediatek 198machine-$(CONFIG_ARCH_MILBEAUT) += milbeaut 199machine-$(CONFIG_ARCH_MXS) += mxs 200machine-$(CONFIG_ARCH_MSTARV7) += mstar 201machine-$(CONFIG_ARCH_NOMADIK) += nomadik 202machine-$(CONFIG_ARCH_NPCM) += npcm 203machine-$(CONFIG_ARCH_NSPIRE) += nspire 204machine-$(CONFIG_ARCH_OXNAS) += oxnas 205machine-$(CONFIG_ARCH_OMAP1) += omap1 206machine-$(CONFIG_ARCH_OMAP2PLUS) += omap2 207machine-$(CONFIG_ARCH_ORION5X) += orion5x 208machine-$(CONFIG_ARCH_PXA) += pxa 209machine-$(CONFIG_ARCH_QCOM) += qcom 210machine-$(CONFIG_ARCH_RDA) += rda 211machine-$(CONFIG_ARCH_REALTEK) += realtek 212machine-$(CONFIG_ARCH_ROCKCHIP) += rockchip 213machine-$(CONFIG_ARCH_RPC) += rpc 214machine-$(CONFIG_PLAT_SAMSUNG) += s3c 215machine-$(CONFIG_ARCH_S5PV210) += s5pv210 216machine-$(CONFIG_ARCH_SA1100) += sa1100 217machine-$(CONFIG_ARCH_RENESAS) += shmobile 218machine-$(CONFIG_ARCH_INTEL_SOCFPGA) += socfpga 219machine-$(CONFIG_ARCH_STI) += sti 220machine-$(CONFIG_ARCH_STM32) += stm32 221machine-$(CONFIG_ARCH_SUNPLUS) += sunplus 222machine-$(CONFIG_ARCH_SUNXI) += sunxi 223machine-$(CONFIG_ARCH_TEGRA) += tegra 224machine-$(CONFIG_ARCH_U8500) += ux500 225machine-$(CONFIG_ARCH_VT8500) += vt8500 226machine-$(CONFIG_ARCH_ZYNQ) += zynq 227machine-$(CONFIG_PLAT_VERSATILE) += versatile 228machine-$(CONFIG_PLAT_SPEAR) += spear 229 230# Platform directory name. This list is sorted alphanumerically 231# by CONFIG_* macro name. 232plat-$(CONFIG_PLAT_ORION) += orion 233 234# The byte offset of the kernel image in RAM from the start of RAM. 235TEXT_OFFSET := $(textofs-y) 236 237# The first directory contains additional information for the boot setup code 238ifneq ($(machine-y),) 239MACHINE := arch/arm/mach-$(word 1,$(machine-y))/ 240else 241MACHINE := 242endif 243ifeq ($(CONFIG_ARCH_MULTIPLATFORM),y) 244MACHINE := 245endif 246 247machdirs := $(patsubst %,arch/arm/mach-%/,$(machine-y)) 248platdirs := $(patsubst %,arch/arm/plat-%/,$(sort $(plat-y))) 249 250ifneq ($(CONFIG_ARCH_MULTIPLATFORM),y) 251ifneq ($(CONFIG_ARM_SINGLE_ARMV7M),y) 252KBUILD_CPPFLAGS += $(patsubst %,-I$(srctree)/%include,$(machdirs) $(platdirs)) 253endif 254endif 255 256export TEXT_OFFSET GZFLAGS MMUEXT 257 258# If we have a machine-specific directory, then include it in the build. 259core-y += $(machdirs) $(platdirs) 260 261# For cleaning 262core- += $(patsubst %,arch/arm/mach-%/, $(machine-)) 263core- += $(patsubst %,arch/arm/plat-%/, $(plat-)) 264 265libs-y := arch/arm/lib/ $(libs-y) 266 267# Default target when executing plain make 268boot := arch/arm/boot 269ifeq ($(CONFIG_XIP_KERNEL),y) 270KBUILD_IMAGE := $(boot)/xipImage 271else 272KBUILD_IMAGE := $(boot)/zImage 273endif 274 275ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y) 276prepare: stack_protector_prepare 277ifeq ($(CONFIG_CC_HAVE_STACKPROTECTOR_TLS),y) 278stack_protector_prepare: prepare0 279 $(eval KBUILD_CFLAGS += \ 280 -mstack-protector-guard=tls \ 281 -mstack-protector-guard-offset=$(shell \ 282 awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}'\ 283 include/generated/asm-offsets.h)) 284else 285stack_protector_prepare: prepare0 286 $(eval SSP_PLUGIN_CFLAGS := \ 287 -fplugin-arg-arm_ssp_per_task_plugin-offset=$(shell \ 288 awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}'\ 289 include/generated/asm-offsets.h)) 290 $(eval KBUILD_CFLAGS += $(SSP_PLUGIN_CFLAGS)) 291 $(eval GCC_PLUGINS_CFLAGS += $(SSP_PLUGIN_CFLAGS)) 292endif 293endif 294 295all: $(notdir $(KBUILD_IMAGE)) 296 297 298archheaders: 299 $(Q)$(MAKE) $(build)=arch/arm/tools uapi 300 301archprepare: 302 $(Q)$(MAKE) $(build)=arch/arm/tools kapi 303 304# Convert bzImage to zImage 305bzImage: zImage 306 307BOOT_TARGETS = zImage Image xipImage bootpImage uImage 308INSTALL_TARGETS = zinstall uinstall install 309 310PHONY += bzImage $(BOOT_TARGETS) $(INSTALL_TARGETS) 311 312bootpImage uImage: zImage 313zImage: Image 314 315$(BOOT_TARGETS): vmlinux 316 $(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/$@ 317 @$(kecho) ' Kernel: $(boot)/$@ is ready' 318 319$(INSTALL_TARGETS): KBUILD_IMAGE = $(boot)/$(patsubst %install,%Image,$@) 320$(INSTALL_TARGETS): 321 $(call cmd,install) 322 323PHONY += vdso_install 324vdso_install: 325ifeq ($(CONFIG_VDSO),y) 326 $(Q)$(MAKE) $(build)=arch/arm/vdso $@ 327endif 328 329# My testing targets (bypasses dependencies) 330bp:; $(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/bootpImage 331 332 333define archhelp 334 echo '* zImage - Compressed kernel image (arch/$(ARCH)/boot/zImage)' 335 echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)' 336 echo '* xipImage - XIP kernel image, if configured (arch/$(ARCH)/boot/xipImage)' 337 echo ' uImage - U-Boot wrapped zImage' 338 echo ' bootpImage - Combined zImage and initial RAM disk' 339 echo ' (supply initrd image via make variable INITRD=<path>)' 340 echo ' install - Install uncompressed kernel' 341 echo ' zinstall - Install compressed kernel' 342 echo ' uinstall - Install U-Boot wrapped compressed kernel' 343 echo ' Install using (your) ~/bin/$(INSTALLKERNEL) or' 344 echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 345 echo ' install to $$(INSTALL_PATH) and run lilo' 346 echo ' vdso_install - Install unstripped vdso.so to $$(INSTALL_MOD_PATH)/vdso' 347endef 348