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WSL2-Linux-Kernel
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WSL2-Linux-Kernel/arch/arm/Makefile

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Makefile
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#
# arch/arm/Makefile
#
# This file is included by the global makefile so that you can add your own
# architecture-specific flags and dependencies.
#
# This file is subject to the terms and conditions of the GNU General Public
# License. See the file "COPYING" in the main directory of this archive
# for more details.
#
# Copyright (C) 1995-2001 by Russell King
LDFLAGS_vmlinux :=-p --no-undefined -X
CPPFLAGS_vmlinux.lds = -DTEXT_OFFSET=$(TEXT_OFFSET)
OBJCOPYFLAGS :=-O binary -R .note -R .note.gnu.build-id -R .comment -S
GZFLAGS :=-9
#KBUILD_CFLAGS +=-pipe
# Explicitly specifiy 32-bit ARM ISA since toolchain default can be -mthumb:
KBUILD_CFLAGS +=$(call cc-option,-marm,)
# Do not use arch/arm/defconfig - it's always outdated.
# Select a platform tht is kept up-to-date
KBUILD_DEFCONFIG := versatile_defconfig
# defines filename extension depending memory manement type.
ifeq ($(CONFIG_MMU),)
MMUEXT := -nommu
endif
ifeq ($(CONFIG_FRAME_POINTER),y)
KBUILD_CFLAGS +=-fno-omit-frame-pointer -mapcs -mno-sched-prolog
endif
ifeq ($(CONFIG_CPU_BIG_ENDIAN),y)
KBUILD_CPPFLAGS += -mbig-endian
AS += -EB
LD += -EB
else
KBUILD_CPPFLAGS += -mlittle-endian
AS += -EL
LD += -EL
endif
comma = ,
# This selects which instruction set is used.
# Note that GCC does not numerically define an architecture version
# macro, but instead defines a whole series of macros which makes
# testing for a specific architecture or later rather impossible.
arch-$(CONFIG_CPU_32v7) :=-D__LINUX_ARM_ARCH__=7 $(call cc-option,-march=armv7-a,-march=armv5t -Wa$(comma)-march=armv7-a)
arch-$(CONFIG_CPU_32v6) :=-D__LINUX_ARM_ARCH__=6 $(call cc-option,-march=armv6,-march=armv5t -Wa$(comma)-march=armv6)
# Only override the compiler option if ARMv6. The ARMv6K extensions are
# always available in ARMv7
ifeq ($(CONFIG_CPU_32v6),y)
arch-$(CONFIG_CPU_32v6K) :=-D__LINUX_ARM_ARCH__=6 $(call cc-option,-march=armv6k,-march=armv5t -Wa$(comma)-march=armv6k)
endif
arch-$(CONFIG_CPU_32v5) :=-D__LINUX_ARM_ARCH__=5 $(call cc-option,-march=armv5te,-march=armv4t)
arch-$(CONFIG_CPU_32v4T) :=-D__LINUX_ARM_ARCH__=4 -march=armv4t
arch-$(CONFIG_CPU_32v4) :=-D__LINUX_ARM_ARCH__=4 -march=armv4
arch-$(CONFIG_CPU_32v3) :=-D__LINUX_ARM_ARCH__=3 -march=armv3
# This selects how we optimise for the processor.
tune-$(CONFIG_CPU_ARM610) :=-mtune=arm610
tune-$(CONFIG_CPU_ARM710) :=-mtune=arm710
tune-$(CONFIG_CPU_ARM7TDMI) :=-mtune=arm7tdmi
tune-$(CONFIG_CPU_ARM720T) :=-mtune=arm7tdmi
tune-$(CONFIG_CPU_ARM740T) :=-mtune=arm7tdmi
tune-$(CONFIG_CPU_ARM9TDMI) :=-mtune=arm9tdmi
tune-$(CONFIG_CPU_ARM940T) :=-mtune=arm9tdmi
tune-$(CONFIG_CPU_ARM946E) :=$(call cc-option,-mtune=arm9e,-mtune=arm9tdmi)
tune-$(CONFIG_CPU_ARM920T) :=-mtune=arm9tdmi
tune-$(CONFIG_CPU_ARM922T) :=-mtune=arm9tdmi
tune-$(CONFIG_CPU_ARM925T) :=-mtune=arm9tdmi
tune-$(CONFIG_CPU_ARM926T) :=-mtune=arm9tdmi
tune-$(CONFIG_CPU_SA110) :=-mtune=strongarm110
tune-$(CONFIG_CPU_SA1100) :=-mtune=strongarm1100
tune-$(CONFIG_CPU_XSCALE) :=$(call cc-option,-mtune=xscale,-mtune=strongarm110) -Wa,-mcpu=xscale
tune-$(CONFIG_CPU_XSC3) :=$(call cc-option,-mtune=xscale,-mtune=strongarm110) -Wa,-mcpu=xscale
tune-$(CONFIG_CPU_V6) :=$(call cc-option,-mtune=arm1136j-s,-mtune=strongarm)
ifeq ($(CONFIG_AEABI),y)
CFLAGS_ABI :=-mabi=aapcs-linux -mno-thumb-interwork
else
CFLAGS_ABI :=$(call cc-option,-mapcs-32,-mabi=apcs-gnu) $(call cc-option,-mno-thumb-interwork,)
endif
# Need -Uarm for gcc < 3.x
KBUILD_CFLAGS +=$(CFLAGS_ABI) $(arch-y) $(tune-y) $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,)) -msoft-float -Uarm
KBUILD_AFLAGS +=$(CFLAGS_ABI) $(arch-y) $(tune-y) -msoft-float
CHECKFLAGS += -D__arm__
#Default value
head-y := arch/arm/kernel/head$(MMUEXT).o arch/arm/kernel/init_task.o
textofs-y := 0x00008000
machine-$(CONFIG_ARCH_RPC) := rpc
machine-$(CONFIG_ARCH_EBSA110) := ebsa110
machine-$(CONFIG_ARCH_CLPS7500) := clps7500
machine-$(CONFIG_FOOTBRIDGE) := footbridge
machine-$(CONFIG_ARCH_SHARK) := shark
machine-$(CONFIG_ARCH_SA1100) := sa1100
ifeq ($(CONFIG_ARCH_SA1100),y)
# SA1111 DMA bug: we don't want the kernel to live in precious DMA-able memory
textofs-$(CONFIG_SA1111) := 0x00208000
endif
machine-$(CONFIG_ARCH_PXA) := pxa
machine-$(CONFIG_ARCH_L7200) := l7200
machine-$(CONFIG_ARCH_INTEGRATOR) := integrator
textofs-$(CONFIG_ARCH_CLPS711X) := 0x00028000
machine-$(CONFIG_ARCH_CLPS711X) := clps711x
machine-$(CONFIG_ARCH_IOP32X) := iop32x
machine-$(CONFIG_ARCH_IOP33X) := iop33x
machine-$(CONFIG_ARCH_IOP13XX) := iop13xx
plat-$(CONFIG_PLAT_IOP) := iop
machine-$(CONFIG_ARCH_IXP4XX) := ixp4xx
machine-$(CONFIG_ARCH_IXP2000) := ixp2000
machine-$(CONFIG_ARCH_IXP23XX) := ixp23xx
machine-$(CONFIG_ARCH_OMAP1) := omap1
machine-$(CONFIG_ARCH_OMAP2) := omap2
machine-$(CONFIG_ARCH_OMAP3) := omap2
plat-$(CONFIG_ARCH_OMAP) := omap
machine-$(CONFIG_ARCH_S3C2410) := s3c2410 s3c2400 s3c2412 s3c2440 s3c2442 s3c2443
plat-$(CONFIG_PLAT_S3C24XX) := s3c24xx s3c
machine-$(CONFIG_ARCH_LH7A40X) := lh7a40x
machine-$(CONFIG_ARCH_VERSATILE) := versatile
machine-$(CONFIG_ARCH_IMX) := imx
machine-$(CONFIG_ARCH_H720X) := h720x
machine-$(CONFIG_ARCH_AAEC2000) := aaec2000
machine-$(CONFIG_ARCH_REALVIEW) := realview
machine-$(CONFIG_ARCH_AT91) := at91
machine-$(CONFIG_ARCH_EP93XX) := ep93xx
machine-$(CONFIG_ARCH_PNX4008) := pnx4008
machine-$(CONFIG_ARCH_NETX) := netx
machine-$(CONFIG_ARCH_NS9XXX) := ns9xxx
machine-$(CONFIG_ARCH_DAVINCI) := davinci
machine-$(CONFIG_ARCH_KIRKWOOD) := kirkwood
machine-$(CONFIG_ARCH_KS8695) := ks8695
plat-$(CONFIG_ARCH_MXC) := mxc
machine-$(CONFIG_ARCH_MX2) := mx2
machine-$(CONFIG_ARCH_MX3) := mx3
machine-$(CONFIG_ARCH_ORION5X) := orion5x
plat-$(CONFIG_PLAT_ORION) := orion
machine-$(CONFIG_ARCH_MSM7X00A) := msm
machine-$(CONFIG_ARCH_LOKI) := loki
machine-$(CONFIG_ARCH_MV78XX0) := mv78xx0
ifeq ($(CONFIG_ARCH_EBSA110),y)
# This is what happens if you forget the IOCS16 line.
# PCMCIA cards stop working.
CFLAGS_3c589_cs.o :=-DISA_SIXTEEN_BIT_PERIPHERAL
export CFLAGS_3c589_cs.o
endif
# The byte offset of the kernel image in RAM from the start of RAM.
TEXT_OFFSET := $(textofs-y)
# The first directory contains additional information for the boot setup code
ifneq ($(machine-y),)
MACHINE := arch/arm/mach-$(word 1,$(machine-y))/
else
MACHINE :=
endif
machdirs := $(patsubst %,arch/arm/mach-%/,$(machine-y))
platdirs := $(patsubst %,arch/arm/plat-%/,$(plat-y))
ifeq ($(KBUILD_SRC),)
KBUILD_CPPFLAGS += $(patsubst %,-I%include,$(machdirs) $(platdirs))
else
KBUILD_CPPFLAGS += $(patsubst %,-I$(srctree)/%include,$(machdirs) $(platdirs))
endif
export TEXT_OFFSET GZFLAGS MMUEXT
# Do we have FASTFPE?
FASTFPE :=arch/arm/fastfpe
ifeq ($(FASTFPE),$(wildcard $(FASTFPE)))
FASTFPE_OBJ :=$(FASTFPE)/
endif
# If we have a machine-specific directory, then include it in the build.
core-y += arch/arm/kernel/ arch/arm/mm/ arch/arm/common/
core-y += $(machdirs) $(platdirs)
core-$(CONFIG_FPE_NWFPE) += arch/arm/nwfpe/
core-$(CONFIG_FPE_FASTFPE) += $(FASTFPE_OBJ)
core-$(CONFIG_VFP) += arch/arm/vfp/
drivers-$(CONFIG_OPROFILE) += arch/arm/oprofile/
libs-y := arch/arm/lib/ $(libs-y)
# Default target when executing plain make
ifeq ($(CONFIG_XIP_KERNEL),y)
KBUILD_IMAGE := xipImage
else
KBUILD_IMAGE := zImage
endif
all: $(KBUILD_IMAGE)
boot := arch/arm/boot
# Update machine arch and proc symlinks if something which affects
# them changed. We use .arch to indicate when they were updated
# last, otherwise make uses the target directory mtime.
archprepare: maketools
PHONY += maketools FORCE
maketools: include/linux/version.h FORCE
$(Q)$(MAKE) $(build)=arch/arm/tools include/asm-arm/mach-types.h
# Convert bzImage to zImage
bzImage: zImage
zImage Image xipImage bootpImage uImage: vmlinux
$(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/$@
zinstall install: vmlinux
$(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $@
CLEAN_FILES += include/asm-arm/mach-types.h \
include/asm-arm/arch include/asm-arm/.arch
# We use MRPROPER_FILES and CLEAN_FILES now
archclean:
$(Q)$(MAKE) $(clean)=$(boot)
# My testing targets (bypasses dependencies)
bp:; $(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/bootpImage
i zi:; $(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $@
define archhelp
echo '* zImage - Compressed kernel image (arch/$(ARCH)/boot/zImage)'
echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
echo '* xipImage - XIP kernel image, if configured (arch/$(ARCH)/boot/xipImage)'
echo ' uImage - U-Boot wrapped zImage'
echo ' bootpImage - Combined zImage and initial RAM disk'
echo ' (supply initrd image via make variable INITRD=<path>)'
echo ' install - Install uncompressed kernel'
echo ' zinstall - Install compressed kernel'
echo ' Install using (your) ~/bin/installkernel or'
echo ' (distribution) /sbin/installkernel or'
echo ' install to $$(INSTALL_PATH) and run lilo'
endef
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