## 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) 1994, 95, 96, 2003 by Ralf Baechle# DECStation modifications by Paul M. Antoine, 1996# Copyright (C) 2002, 2003, 2004 Maciej W. Rozycki## This file is included by the global makefile so that you can add your own# architecture-specific flags and dependencies.# archscripts: scripts_basic $(Q)$(MAKE) $(build)=arch/mips/tools elf-entryifeq ($(CONFIG_CPU_LOONGSON3_WORKAROUNDS),y) $(Q)$(MAKE) $(build)=arch/mips/tools loongson3-llsc-checkendif $(Q)$(MAKE) $(build)=arch/mips/boot/tools relocs KBUILD_DEFCONFIG := 32r2el_defconfigKBUILD_DTBS := dtbs ## Select the object file format to substitute into the linker script.#ifdef CONFIG_CPU_LITTLE_ENDIAN32bit-tool-archpref = mipsel64bit-tool-archpref = mips64el32bit-bfd = elf32-tradlittlemips64bit-bfd = elf64-tradlittlemips32bit-emul = elf32ltsmip64bit-emul = elf64ltsmipelse32bit-tool-archpref = mips64bit-tool-archpref = mips6432bit-bfd = elf32-tradbigmips64bit-bfd = elf64-tradbigmips32bit-emul = elf32btsmip64bit-emul = elf64btsmipendif ifdef CONFIG_32BITtool-archpref = $(32bit-tool-archpref)UTS_MACHINE := mipsendififdef CONFIG_64BITtool-archpref = $(64bit-tool-archpref)UTS_MACHINE := mips64endif ifdef cross_compiling ifeq ($(CROSS_COMPILE),) CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux- $(tool-archpref)-linux-gnu- $(tool-archpref)-unknown-linux-gnu-) endifendif ifdef CONFIG_FUNCTION_GRAPH_TRACER ifndef KBUILD_MCOUNT_RA_ADDRESS ifeq ($(call cc-option-yn,-mmcount-ra-address), y) cflags-y += -mmcount-ra-address -DKBUILD_MCOUNT_RA_ADDRESS endif endifendifcflags-y += $(call cc-option, -mno-check-zero-division) ifdef CONFIG_32BITld-emul = $(32bit-emul)vmlinux-32 = vmlinuxvmlinux-64 = vmlinux.64 cflags-y += -mabi=32endif ifdef CONFIG_64BITld-emul = $(64bit-emul)vmlinux-32 = vmlinux.32vmlinux-64 = vmlinux cflags-y += -mabi=64endif all-$(CONFIG_BOOT_ELF32) := $(vmlinux-32)all-$(CONFIG_BOOT_ELF64) := $(vmlinux-64)all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlinuz ## GCC uses -G 0 -mabicalls -fpic as default. We don't want PIC in the kernel# code since it only slows down the whole thing. At some point we might make# use of global pointer optimizations but their use of $28 conflicts with# the current pointer optimization.## The DECStation requires an ECOFF kernel for remote booting, other MIPS# machines may also. Since BFD is incredibly buggy with respect to# crossformat linking we rely on the elf2ecoff tool for format conversion.#cflags-y += -G 0 -mno-abicalls -fno-pic -pipecflags-y += -msoft-float -Wa,-msoft-floatLDFLAGS_vmlinux += -G 0 -static -n -nostdlibKBUILD_AFLAGS_MODULE += -mlong-callsKBUILD_CFLAGS_MODULE += -mlong-calls cflags-y += -ffreestanding cflags-$(CONFIG_CPU_BIG_ENDIAN) += -EBcflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -EL cflags-$(CONFIG_SB1XXX_CORELIS) += $(call cc-option,-mno-sched-prolog) \ -fno-omit-frame-pointer # Some distribution-specific toolchains might pass the -fstack-check# option during the build, which adds a simple stack-probe at the beginning# of every function. This stack probe is to ensure that there is enough# stack space, else a SEGV is generated. This is not desirable for MIPS# as kernel stacks are small, placed in unmapped virtual memory, and do not# grow when overflowed. Especially on SGI IP27 platforms, this check will# lead to a NULL pointer dereference in _raw_spin_lock_irq.## In disassembly, this stack probe appears at the top of a function as:# sd zero,<offset>(sp)# Where <offset> is a negative value.#cflags-y += -fno-stack-check # binutils from v2.35 when built with --enable-mips-fix-loongson3-llsc=yes,# supports an -mfix-loongson3-llsc flag which emits a sync prior to each ll# instruction to work around a CPU bug (see __SYNC_loongson3_war in asm/sync.h# for a description).## We disable this in order to prevent the assembler meddling with the# instruction that labels refer to, ie. if we label an ll instruction:## 1: ll v0, 0(a0)## ...then with the assembler fix applied the label may actually point at a sync# instruction inserted by the assembler, and if we were using the label in an# exception table the table would no longer contain the address of the ll# instruction.## Avoid this by explicitly disabling that assembler behaviour.#cflags-y += $(call cc-option,-Wa$(comma)-mno-fix-loongson3-llsc,) ## CPU-dependent compiler/assembler options for optimization.#cflags-$(CONFIG_CPU_R3000) += $(call cc-option,-march=r3000,-march=mips1)cflags-$(CONFIG_CPU_R4300) += $(call cc-option,-march=r4300,-march=mips3) -Wa,--trapcflags-$(CONFIG_CPU_R4X00) += $(call cc-option,-march=r4600,-march=mips3) -Wa,--trapcflags-$(CONFIG_CPU_TX49XX) += $(call cc-option,-march=r4600,-march=mips3) -Wa,--trapcflags-$(CONFIG_CPU_MIPS32_R1) += -march=mips32 -Wa,--trapcflags-$(CONFIG_CPU_MIPS32_R2) += -march=mips32r2 -Wa,--trapcflags-$(CONFIG_CPU_MIPS32_R5) += -march=mips32r5 -Wa,--trap -modd-spregcflags-$(CONFIG_CPU_MIPS32_R6) += -march=mips32r6 -Wa,--trap -modd-spregcflags-$(CONFIG_CPU_MIPS64_R1) += -march=mips64 -Wa,--trapcflags-$(CONFIG_CPU_MIPS64_R2) += -march=mips64r2 -Wa,--trapcflags-$(CONFIG_CPU_MIPS64_R5) += -march=mips64r5 -Wa,--trapcflags-$(CONFIG_CPU_MIPS64_R6) += -march=mips64r6 -Wa,--trapcflags-$(CONFIG_CPU_P5600) += $(call cc-option,-march=p5600,-march=mips32r5) \ -Wa,--trap -modd-spregcflags-$(CONFIG_CPU_R5000) += $(call cc-option,-march=r5000,-march=mips4) \ -Wa,--trapcflags-$(CONFIG_CPU_R5500) += $(call cc-option,-march=r5500,-march=mips4) \ -Wa,--trapcflags-$(CONFIG_CPU_NEVADA) += $(call cc-option,-march=rm5200,-march=mips4) \ -Wa,--trapcflags-$(CONFIG_CPU_RM7000) += $(call cc-option,-march=rm7000,-march=mips4) \ -Wa,--trapcflags-$(CONFIG_CPU_SB1) += $(call cc-option,-march=sb1,-march=mips64) \ -Wa,--trapcflags-$(CONFIG_CPU_SB1) += $(call cc-option,-mno-mdmx)cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-mno-mips3d)cflags-$(CONFIG_CPU_R10000) += $(call cc-option,-march=r10000,-march=mips4) \ -Wa,--trapcflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -march=octeon -Wa,--trapcflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1cflags-$(CONFIG_CPU_BMIPS) += -march=mips32 -Wa,--trap cflags-$(CONFIG_CPU_LOONGSON2E) += \ $(call cc-option,-march=loongson2e,-march=mips3) -Wa,--trapcflags-$(CONFIG_CPU_LOONGSON2F) += \ $(call cc-option,-march=loongson2f,-march=mips3) -Wa,--trap# Some -march= flags enable MMI instructions, and GCC complains about that# support being enabled alongside -msoft-float. Thus explicitly disable MMI.cflags-$(CONFIG_CPU_LOONGSON2EF) += $(call cc-option,-mno-loongson-mmi)cflags-$(CONFIG_CPU_LOONGSON64) += \ $(call cc-option,-march=loongson3a,-march=mips64r2) -Wa,--trapcflags-$(CONFIG_CPU_LOONGSON64) += $(call cc-option,-mno-loongson-mmi) cflags-$(CONFIG_CPU_R4000_WORKAROUNDS) += $(call cc-option,-mfix-r4000,)cflags-$(CONFIG_CPU_R4400_WORKAROUNDS) += $(call cc-option,-mfix-r4400,)cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS) += $(call cc-option,-mno-daddi,)ifdef CONFIG_CPU_LOONGSON2F_WORKAROUNDScflags-$(CONFIG_CPU_NOP_WORKAROUNDS) += -Wa,-mfix-loongson2f-nopcflags-$(CONFIG_CPU_JUMP_WORKAROUNDS) += -Wa,-mfix-loongson2f-jumpendif ## Some versions of binutils, not currently mainline as of 2019/02/04, support# an -mfix-loongson3-llsc flag which emits a sync prior to each ll instruction# to work around a CPU bug (see __SYNC_loongson3_war in asm/sync.h for a# description).## We disable this in order to prevent the assembler meddling with the# instruction that labels refer to, ie. if we label an ll instruction:## 1: ll v0, 0(a0)## ...then with the assembler fix applied the label may actually point at a sync# instruction inserted by the assembler, and if we were using the label in an# exception table the table would no longer contain the address of the ll# instruction.## Avoid this by explicitly disabling that assembler behaviour. If upstream# binutils does not merge support for the flag then we can revisit & remove# this later - for now it ensures vendor toolchains don't cause problems.#cflags-$(CONFIG_CPU_LOONGSON64) += $(call as-option,-Wa$(comma)-mno-fix-loongson3-llsc,) # For smartmips configurations, there are hundreds of warnings due to ISA overrides# in assembly and header files. smartmips is only supported for MIPS32r1 onwards# and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or# similar directives in the kernel will spam the build logs with the following warnings:# Warning: the `smartmips' extension requires MIPS32 revision 1 or greater# or# Warning: the 64-bit MIPS architecture does not support the `smartmips' extension# Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has# been fixed properly.mips-cflags := $(cflags-y)ifeq ($(CONFIG_CPU_HAS_SMARTMIPS),y)smartmips-ase := $(call cc-option-yn,$(mips-cflags) -msmartmips)cflags-$(smartmips-ase) += -msmartmips -Wa,--no-warnendififeq ($(CONFIG_CPU_MICROMIPS),y)micromips-ase := $(call cc-option-yn,$(mips-cflags) -mmicromips)cflags-$(micromips-ase) += -mmicromipsendififeq ($(CONFIG_CPU_HAS_MSA),y)toolchain-msa := $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa)cflags-$(toolchain-msa) += -DTOOLCHAIN_SUPPORTS_MSAendiftoolchain-virt := $(call cc-option-yn,$(mips-cflags) -mvirt)cflags-$(toolchain-virt) += -DTOOLCHAIN_SUPPORTS_VIRT# For -mmicromips, use -Wa,-fatal-warnings to catch unsupported -mxpa which# only warnsxpa-cflags-y := $(mips-cflags)xpa-cflags-$(micromips-ase) += -mmicromips -Wa$(comma)-fatal-warningstoolchain-xpa := $(call cc-option-yn,$(xpa-cflags-y) -mxpa)cflags-$(toolchain-xpa) += -DTOOLCHAIN_SUPPORTS_XPAtoolchain-crc := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mcrc)cflags-$(toolchain-crc) += -DTOOLCHAIN_SUPPORTS_CRCtoolchain-dsp := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mdsp)cflags-$(toolchain-dsp) += -DTOOLCHAIN_SUPPORTS_DSPtoolchain-ginv := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mginv)cflags-$(toolchain-ginv) += -DTOOLCHAIN_SUPPORTS_GINV ## Firmware support#libs-$(CONFIG_FW_ARC) += arch/mips/fw/arc/libs-$(CONFIG_FW_CFE) += arch/mips/fw/cfe/libs-$(CONFIG_FW_SNIPROM) += arch/mips/fw/sni/libs-y += arch/mips/fw/lib/ ## Kernel compression#ifdef CONFIG_SYS_SUPPORTS_ZBOOTCOMPRESSION_FNAME = vmlinuzelseCOMPRESSION_FNAME = vmlinuxendif ## Board-dependent options and extra files#include $(srctree)/arch/mips/Kbuild.platforms ifdef CONFIG_PHYSICAL_STARTload-y = $(CONFIG_PHYSICAL_START)endif entry-y = $(shell $(objtree)/arch/mips/tools/elf-entry vmlinux)cflags-y += -I$(srctree)/arch/mips/include/asm/mach-genericdrivers-$(CONFIG_PCI) += arch/mips/pci/ ## Automatically detect the build format. By default we choose# the elf format according to the load address.# We can always force a build with a 64-bits symbol format by# passing 'KBUILD_SYM32=no' option to the make's command line.#ifdef CONFIG_64BIT ifndef KBUILD_SYM32 ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0) KBUILD_SYM32 = $(call cc-option-yn, -msym32) endif endif ifeq ($(KBUILD_SYM32), y) cflags-$(KBUILD_SYM32) += -msym32 -DKBUILD_64BIT_SYM32 else ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y) $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32) endif endifendif # When linking a 32-bit executable the LLVM linker cannot cope with a# 32-bit load address that has been sign-extended to 64 bits. Simply# remove the upper 32 bits then, as it is safe to do so with other# linkers.ifdef CONFIG_64BIT load-ld = $(load-y)else load-ld = $(subst 0xffffffff,0x,$(load-y))endif KBUILD_AFLAGS += $(cflags-y)KBUILD_CFLAGS += $(cflags-y)KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y) -DLINKER_LOAD_ADDRESS=$(load-ld)KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0) bootvars-y = VMLINUX_LOAD_ADDRESS=$(load-y) \ LINKER_LOAD_ADDRESS=$(load-ld) \ VMLINUX_ENTRY_ADDRESS=$(entry-y) \ PLATFORM="$(platform-y)" \ ITS_INPUTS="$(its-y)"ifdef CONFIG_32BITbootvars-y += ADDR_BITS=32endififdef CONFIG_64BITbootvars-y += ADDR_BITS=64endif # This is required to get dwarf unwinding tables into .debug_frame# instead of .eh_frame so we don't discard them.KBUILD_CFLAGS += -fno-asynchronous-unwind-tables KBUILD_LDFLAGS += -m $(ld-emul) ifdef need-compilerCHECKFLAGS += $(shell $(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \ grep -E -vw '__GNUC_(MINOR_|PATCHLEVEL_)?_' | \ sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')endif OBJCOPYFLAGS += --remove-section=.reginfo libs-y += arch/mips/lib/libs-$(CONFIG_MIPS_FP_SUPPORT) += arch/mips/math-emu/ # suspend and hibernation supportdrivers-$(CONFIG_PM) += arch/mips/power/ # boot image targets (arch/mips/boot/)boot-y := vmlinux.binboot-y += vmlinux.ecoffboot-y += vmlinux.srecboot-y += uImageboot-y += uImage.binboot-y += uImage.bz2boot-y += uImage.gzboot-y += uImage.lzmaboot-y += uImage.lzoboot-y += vmlinux.itbboot-y += vmlinux.gz.itbboot-y += vmlinux.bz2.itbboot-y += vmlinux.lzma.itbboot-y += vmlinux.lzo.itb # compressed boot image targets (arch/mips/boot/compressed/)bootz-y := vmlinuzbootz-y += vmlinuz.binbootz-y += vmlinuz.ecoffbootz-y += vmlinuz.srecbootz-y += uzImage.binbootz-y += vmlinuz.itb ## Some machines like the Indy need 32-bit ELF binaries for booting purposes.# Other need ECOFF, so we build a 32-bit ELF binary for them which we then# convert to ECOFF using elf2ecoff.#quiet_cmd_32 = OBJCOPY $@ cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@vmlinux.32: vmlinux $(call cmd,32) ## The 64-bit ELF tools are pretty broken so at this time we generate 64-bit# ELF files from 32-bit files by conversion.#quiet_cmd_64 = OBJCOPY $@ cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@vmlinux.64: vmlinux $(call cmd,64) all: $(all-y) $(KBUILD_DTBS) # boot$(boot-y): $(vmlinux-32) FORCE $(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \ $(bootvars-y) arch/mips/boot/$@ ifdef CONFIG_SYS_SUPPORTS_ZBOOT# boot/compressed$(bootz-y): $(vmlinux-32) FORCE $(Q)$(MAKE) $(build)=arch/mips/boot/compressed \ $(bootvars-y) 32bit-bfd=$(32bit-bfd) arch/mips/boot/$@elsevmlinuz: FORCE @echo ' CONFIG_SYS_SUPPORTS_ZBOOT is not enabled' /bin/falseendif CLEAN_FILES += vmlinux.32 vmlinux.64 archprepare:ifdef CONFIG_MIPS32_N32 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_instance="N32" missing_syscalls_flags="-mabi=n32"endififdef CONFIG_MIPS32_O32 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_instance="O32" missing_syscalls_flags="-mabi=32"endif install: $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)ifdef CONFIG_SYS_SUPPORTS_ZBOOT $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)endif $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE) $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE) archheaders: $(Q)$(MAKE) $(build)=arch/mips/kernel/syscalls all define archhelp echo ' install - install kernel into $(INSTALL_PATH)' echo ' vmlinux.ecoff - ECOFF boot image' echo ' vmlinux.bin - Raw binary boot image' echo ' vmlinux.srec - SREC boot image' echo ' vmlinux.32 - 64-bit boot image wrapped in 32bits (IP22/IP32)' echo ' vmlinuz - Compressed boot(zboot) image' echo ' vmlinuz.ecoff - ECOFF zboot image' echo ' vmlinuz.bin - Raw binary zboot image' echo ' vmlinuz.srec - SREC zboot image' echo ' uImage - U-Boot image' echo ' uImage.bin - U-Boot image (uncompressed)' echo ' uImage.bz2 - U-Boot image (bz2)' echo ' uImage.gz - U-Boot image (gzip)' echo ' uImage.lzma - U-Boot image (lzma)' echo ' uImage.lzo - U-Boot image (lzo)' echo ' uzImage.bin - U-Boot image (self-extracting)' echo echo ' These will be default as appropriate for a configured platform.' echo echo ' If you are targeting a system supported by generic kernels you may' echo ' configure the kernel for a given architecture target like so:' echo echo ' {micro32,32,64}{r1,r2,r6}{el,}_defconfig <BOARDS="list of boards">' echo echo ' Where BOARDS is some subset of the following:' for board in $(sort $(BOARDS)); do echo " $${board}"; done echo echo ' Specifically the following generic default configurations are' echo ' supported:' echo $(foreach cfg,$(generic_defconfigs), printf " %-24s - Build generic kernel for $(call describe_generic_defconfig,$(cfg))\n" $(cfg);) echo echo ' The following legacy default configurations have been converted to' echo ' generic and can still be used:' echo $(foreach cfg,$(sort $(legacy_defconfigs)), printf " %-24s - Build $($(cfg)-y)\n" $(cfg);) echo echo ' Otherwise, the following default configurations are available:'endef generic_config_dir = $(srctree)/arch/$(ARCH)/configs/genericgeneric_defconfigs := ## If the user generates a generic kernel configuration without specifying a# list of boards to include the config fragments for, default to including all# available board config fragments.#ifeq ($(BOARDS),)BOARDS = $(patsubst board-%.config,%,$(notdir $(wildcard $(generic_config_dir)/board-*.config)))endif ## Generic kernel configurations which merge generic_defconfig with the# appropriate config fragments from arch/mips/configs/generic/, resulting in# the ability to easily configure the kernel for a given architecture,# endianness & set of boards without duplicating the needed configuration in# hundreds of defconfig files.#Lines 1–500 of 570. Load more
# # 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) 1994, 95, 96, 2003 by Ralf Baechle # DECStation modifications by Paul M. Antoine, 1996 # Copyright (C) 2002, 2003, 2004 Maciej W. Rozycki # # This file is included by the global makefile so that you can add your own # architecture-specific flags and dependencies. # archscripts: scripts_basic $(Q)$(MAKE) $(build)=arch/mips/tools elf-entry ifeq ($(CONFIG_CPU_LOONGSON3_WORKAROUNDS),y) $(Q)$(MAKE) $(build)=arch/mips/tools loongson3-llsc-check endif $(Q)$(MAKE) $(build)=arch/mips/boot/tools relocs KBUILD_DEFCONFIG := 32r2el_defconfig KBUILD_DTBS := dtbs # # Select the object file format to substitute into the linker script. # ifdef CONFIG_CPU_LITTLE_ENDIAN 32bit-tool-archpref = mipsel 64bit-tool-archpref = mips64el 32bit-bfd = elf32-tradlittlemips 64bit-bfd = elf64-tradlittlemips 32bit-emul = elf32ltsmip 64bit-emul = elf64ltsmip else 32bit-tool-archpref = mips 64bit-tool-archpref = mips64 32bit-bfd = elf32-tradbigmips 64bit-bfd = elf64-tradbigmips 32bit-emul = elf32btsmip 64bit-emul = elf64btsmip endif ifdef CONFIG_32BIT tool-archpref = $(32bit-tool-archpref) UTS_MACHINE := mips endif ifdef CONFIG_64BIT tool-archpref = $(64bit-tool-archpref) UTS_MACHINE := mips64 endif ifdef cross_compiling ifeq ($(CROSS_COMPILE),) CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux- $(tool-archpref)-linux-gnu- $(tool-archpref)-unknown-linux-gnu-) endif endif ifdef CONFIG_FUNCTION_GRAPH_TRACER ifndef KBUILD_MCOUNT_RA_ADDRESS ifeq ($(call cc-option-yn,-mmcount-ra-address), y) cflags-y += -mmcount-ra-address -DKBUILD_MCOUNT_RA_ADDRESS endif endif endif cflags-y += $(call cc-option, -mno-check-zero-division) ifdef CONFIG_32BIT ld-emul = $(32bit-emul) vmlinux-32 = vmlinux vmlinux-64 = vmlinux.64 cflags-y += -mabi=32 endif ifdef CONFIG_64BIT ld-emul = $(64bit-emul) vmlinux-32 = vmlinux.32 vmlinux-64 = vmlinux cflags-y += -mabi=64 endif all-$(CONFIG_BOOT_ELF32) := $(vmlinux-32) all-$(CONFIG_BOOT_ELF64) := $(vmlinux-64) all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlinuz # # GCC uses -G 0 -mabicalls -fpic as default. We don't want PIC in the kernel # code since it only slows down the whole thing. At some point we might make # use of global pointer optimizations but their use of $28 conflicts with # the current pointer optimization. # # The DECStation requires an ECOFF kernel for remote booting, other MIPS # machines may also. Since BFD is incredibly buggy with respect to # crossformat linking we rely on the elf2ecoff tool for format conversion. # cflags-y += -G 0 -mno-abicalls -fno-pic -pipe cflags-y += -msoft-float -Wa,-msoft-float LDFLAGS_vmlinux += -G 0 -static -n -nostdlib KBUILD_AFLAGS_MODULE += -mlong-calls KBUILD_CFLAGS_MODULE += -mlong-calls cflags-y += -ffreestanding cflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -EL cflags-$(CONFIG_SB1XXX_CORELIS) += $(call cc-option,-mno-sched-prolog) \ -fno-omit-frame-pointer # Some distribution-specific toolchains might pass the -fstack-check # option during the build, which adds a simple stack-probe at the beginning # of every function. This stack probe is to ensure that there is enough # stack space, else a SEGV is generated. This is not desirable for MIPS # as kernel stacks are small, placed in unmapped virtual memory, and do not # grow when overflowed. Especially on SGI IP27 platforms, this check will # lead to a NULL pointer dereference in _raw_spin_lock_irq. # # In disassembly, this stack probe appears at the top of a function as: # sd zero,<offset>(sp) # Where <offset> is a negative value. # cflags-y += -fno-stack-check # binutils from v2.35 when built with --enable-mips-fix-loongson3-llsc=yes, # supports an -mfix-loongson3-llsc flag which emits a sync prior to each ll # instruction to work around a CPU bug (see __SYNC_loongson3_war in asm/sync.h # for a description). # # We disable this in order to prevent the assembler meddling with the # instruction that labels refer to, ie. if we label an ll instruction: # # 1: ll v0, 0(a0) # # ...then with the assembler fix applied the label may actually point at a sync # instruction inserted by the assembler, and if we were using the label in an # exception table the table would no longer contain the address of the ll # instruction. # # Avoid this by explicitly disabling that assembler behaviour. # cflags-y += $(call cc-option,-Wa$(comma)-mno-fix-loongson3-llsc,) # # CPU-dependent compiler/assembler options for optimization. # cflags-$(CONFIG_CPU_R3000) += $(call cc-option,-march=r3000,-march=mips1) cflags-$(CONFIG_CPU_R4300) += $(call cc-option,-march=r4300,-march=mips3) -Wa,--trap cflags-$(CONFIG_CPU_R4X00) += $(call cc-option,-march=r4600,-march=mips3) -Wa,--trap cflags-$(CONFIG_CPU_TX49XX) += $(call cc-option,-march=r4600,-march=mips3) -Wa,--trap cflags-$(CONFIG_CPU_MIPS32_R1) += -march=mips32 -Wa,--trap cflags-$(CONFIG_CPU_MIPS32_R2) += -march=mips32r2 -Wa,--trap cflags-$(CONFIG_CPU_MIPS32_R5) += -march=mips32r5 -Wa,--trap -modd-spreg cflags-$(CONFIG_CPU_MIPS32_R6) += -march=mips32r6 -Wa,--trap -modd-spreg cflags-$(CONFIG_CPU_MIPS64_R1) += -march=mips64 -Wa,--trap cflags-$(CONFIG_CPU_MIPS64_R2) += -march=mips64r2 -Wa,--trap cflags-$(CONFIG_CPU_MIPS64_R5) += -march=mips64r5 -Wa,--trap cflags-$(CONFIG_CPU_MIPS64_R6) += -march=mips64r6 -Wa,--trap cflags-$(CONFIG_CPU_P5600) += $(call cc-option,-march=p5600,-march=mips32r5) \ -Wa,--trap -modd-spreg cflags-$(CONFIG_CPU_R5000) += $(call cc-option,-march=r5000,-march=mips4) \ -Wa,--trap cflags-$(CONFIG_CPU_R5500) += $(call cc-option,-march=r5500,-march=mips4) \ -Wa,--trap cflags-$(CONFIG_CPU_NEVADA) += $(call cc-option,-march=rm5200,-march=mips4) \ -Wa,--trap cflags-$(CONFIG_CPU_RM7000) += $(call cc-option,-march=rm7000,-march=mips4) \ -Wa,--trap cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-march=sb1,-march=mips64) \ -Wa,--trap cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-mno-mdmx) cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-mno-mips3d) cflags-$(CONFIG_CPU_R10000) += $(call cc-option,-march=r10000,-march=mips4) \ -Wa,--trap cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -march=octeon -Wa,--trap cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1 cflags-$(CONFIG_CPU_BMIPS) += -march=mips32 -Wa,--trap cflags-$(CONFIG_CPU_LOONGSON2E) += \ $(call cc-option,-march=loongson2e,-march=mips3) -Wa,--trap cflags-$(CONFIG_CPU_LOONGSON2F) += \ $(call cc-option,-march=loongson2f,-march=mips3) -Wa,--trap # Some -march= flags enable MMI instructions, and GCC complains about that # support being enabled alongside -msoft-float. Thus explicitly disable MMI. cflags-$(CONFIG_CPU_LOONGSON2EF) += $(call cc-option,-mno-loongson-mmi) cflags-$(CONFIG_CPU_LOONGSON64) += \ $(call cc-option,-march=loongson3a,-march=mips64r2) -Wa,--trap cflags-$(CONFIG_CPU_LOONGSON64) += $(call cc-option,-mno-loongson-mmi) cflags-$(CONFIG_CPU_R4000_WORKAROUNDS) += $(call cc-option,-mfix-r4000,) cflags-$(CONFIG_CPU_R4400_WORKAROUNDS) += $(call cc-option,-mfix-r4400,) cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS) += $(call cc-option,-mno-daddi,) ifdef CONFIG_CPU_LOONGSON2F_WORKAROUNDS cflags-$(CONFIG_CPU_NOP_WORKAROUNDS) += -Wa,-mfix-loongson2f-nop cflags-$(CONFIG_CPU_JUMP_WORKAROUNDS) += -Wa,-mfix-loongson2f-jump endif # # Some versions of binutils, not currently mainline as of 2019/02/04, support # an -mfix-loongson3-llsc flag which emits a sync prior to each ll instruction # to work around a CPU bug (see __SYNC_loongson3_war in asm/sync.h for a # description). # # We disable this in order to prevent the assembler meddling with the # instruction that labels refer to, ie. if we label an ll instruction: # # 1: ll v0, 0(a0) # # ...then with the assembler fix applied the label may actually point at a sync # instruction inserted by the assembler, and if we were using the label in an # exception table the table would no longer contain the address of the ll # instruction. # # Avoid this by explicitly disabling that assembler behaviour. If upstream # binutils does not merge support for the flag then we can revisit & remove # this later - for now it ensures vendor toolchains don't cause problems. # cflags-$(CONFIG_CPU_LOONGSON64) += $(call as-option,-Wa$(comma)-mno-fix-loongson3-llsc,) # For smartmips configurations, there are hundreds of warnings due to ISA overrides # in assembly and header files. smartmips is only supported for MIPS32r1 onwards # and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or # similar directives in the kernel will spam the build logs with the following warnings: # Warning: the `smartmips' extension requires MIPS32 revision 1 or greater # or # Warning: the 64-bit MIPS architecture does not support the `smartmips' extension # Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has # been fixed properly. mips-cflags := $(cflags-y) ifeq ($(CONFIG_CPU_HAS_SMARTMIPS),y) smartmips-ase := $(call cc-option-yn,$(mips-cflags) -msmartmips) cflags-$(smartmips-ase) += -msmartmips -Wa,--no-warn endif ifeq ($(CONFIG_CPU_MICROMIPS),y) micromips-ase := $(call cc-option-yn,$(mips-cflags) -mmicromips) cflags-$(micromips-ase) += -mmicromips endif ifeq ($(CONFIG_CPU_HAS_MSA),y) toolchain-msa := $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa) cflags-$(toolchain-msa) += -DTOOLCHAIN_SUPPORTS_MSA endif toolchain-virt := $(call cc-option-yn,$(mips-cflags) -mvirt) cflags-$(toolchain-virt) += -DTOOLCHAIN_SUPPORTS_VIRT # For -mmicromips, use -Wa,-fatal-warnings to catch unsupported -mxpa which # only warns xpa-cflags-y := $(mips-cflags) xpa-cflags-$(micromips-ase) += -mmicromips -Wa$(comma)-fatal-warnings toolchain-xpa := $(call cc-option-yn,$(xpa-cflags-y) -mxpa) cflags-$(toolchain-xpa) += -DTOOLCHAIN_SUPPORTS_XPA toolchain-crc := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mcrc) cflags-$(toolchain-crc) += -DTOOLCHAIN_SUPPORTS_CRC toolchain-dsp := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mdsp) cflags-$(toolchain-dsp) += -DTOOLCHAIN_SUPPORTS_DSP toolchain-ginv := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mginv) cflags-$(toolchain-ginv) += -DTOOLCHAIN_SUPPORTS_GINV # # Firmware support # libs-$(CONFIG_FW_ARC) += arch/mips/fw/arc/ libs-$(CONFIG_FW_CFE) += arch/mips/fw/cfe/ libs-$(CONFIG_FW_SNIPROM) += arch/mips/fw/sni/ libs-y += arch/mips/fw/lib/ # # Kernel compression # ifdef CONFIG_SYS_SUPPORTS_ZBOOT COMPRESSION_FNAME = vmlinuz else COMPRESSION_FNAME = vmlinux endif # # Board-dependent options and extra files # include $(srctree)/arch/mips/Kbuild.platforms ifdef CONFIG_PHYSICAL_START load-y = $(CONFIG_PHYSICAL_START) endif entry-y = $(shell $(objtree)/arch/mips/tools/elf-entry vmlinux) cflags-y += -I$(srctree)/arch/mips/include/asm/mach-generic drivers-$(CONFIG_PCI) += arch/mips/pci/ # # Automatically detect the build format. By default we choose # the elf format according to the load address. # We can always force a build with a 64-bits symbol format by # passing 'KBUILD_SYM32=no' option to the make's command line. # ifdef CONFIG_64BIT ifndef KBUILD_SYM32 ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0) KBUILD_SYM32 = $(call cc-option-yn, -msym32) endif endif ifeq ($(KBUILD_SYM32), y) cflags-$(KBUILD_SYM32) += -msym32 -DKBUILD_64BIT_SYM32 else ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y) $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32) endif endif endif # When linking a 32-bit executable the LLVM linker cannot cope with a # 32-bit load address that has been sign-extended to 64 bits. Simply # remove the upper 32 bits then, as it is safe to do so with other # linkers. ifdef CONFIG_64BIT load-ld = $(load-y) else load-ld = $(subst 0xffffffff,0x,$(load-y)) endif KBUILD_AFLAGS += $(cflags-y) KBUILD_CFLAGS += $(cflags-y) KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y) -DLINKER_LOAD_ADDRESS=$(load-ld) KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0) bootvars-y = VMLINUX_LOAD_ADDRESS=$(load-y) \ LINKER_LOAD_ADDRESS=$(load-ld) \ VMLINUX_ENTRY_ADDRESS=$(entry-y) \ PLATFORM="$(platform-y)" \ ITS_INPUTS="$(its-y)" ifdef CONFIG_32BIT bootvars-y += ADDR_BITS=32 endif ifdef CONFIG_64BIT bootvars-y += ADDR_BITS=64 endif # This is required to get dwarf unwinding tables into .debug_frame # instead of .eh_frame so we don't discard them. KBUILD_CFLAGS += -fno-asynchronous-unwind-tables KBUILD_LDFLAGS += -m $(ld-emul) ifdef need-compiler CHECKFLAGS += $(shell $(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \ grep -E -vw '__GNUC_(MINOR_|PATCHLEVEL_)?_' | \ sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g') endif OBJCOPYFLAGS += --remove-section=.reginfo libs-y += arch/mips/lib/ libs-$(CONFIG_MIPS_FP_SUPPORT) += arch/mips/math-emu/ # suspend and hibernation support drivers-$(CONFIG_PM) += arch/mips/power/ # boot image targets (arch/mips/boot/) boot-y := vmlinux.bin boot-y += vmlinux.ecoff boot-y += vmlinux.srec boot-y += uImage boot-y += uImage.bin boot-y += uImage.bz2 boot-y += uImage.gz boot-y += uImage.lzma boot-y += uImage.lzo boot-y += vmlinux.itb boot-y += vmlinux.gz.itb boot-y += vmlinux.bz2.itb boot-y += vmlinux.lzma.itb boot-y += vmlinux.lzo.itb # compressed boot image targets (arch/mips/boot/compressed/) bootz-y := vmlinuz bootz-y += vmlinuz.bin bootz-y += vmlinuz.ecoff bootz-y += vmlinuz.srec bootz-y += uzImage.bin bootz-y += vmlinuz.itb # # Some machines like the Indy need 32-bit ELF binaries for booting purposes. # Other need ECOFF, so we build a 32-bit ELF binary for them which we then # convert to ECOFF using elf2ecoff. # quiet_cmd_32 = OBJCOPY $@ cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@ vmlinux.32: vmlinux $(call cmd,32) # # The 64-bit ELF tools are pretty broken so at this time we generate 64-bit # ELF files from 32-bit files by conversion. # quiet_cmd_64 = OBJCOPY $@ cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@ vmlinux.64: vmlinux $(call cmd,64) all: $(all-y) $(KBUILD_DTBS) # boot $(boot-y): $(vmlinux-32) FORCE $(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \ $(bootvars-y) arch/mips/boot/$@ ifdef CONFIG_SYS_SUPPORTS_ZBOOT # boot/compressed $(bootz-y): $(vmlinux-32) FORCE $(Q)$(MAKE) $(build)=arch/mips/boot/compressed \ $(bootvars-y) 32bit-bfd=$(32bit-bfd) arch/mips/boot/$@ else vmlinuz: FORCE @echo ' CONFIG_SYS_SUPPORTS_ZBOOT is not enabled' /bin/false endif CLEAN_FILES += vmlinux.32 vmlinux.64 archprepare: ifdef CONFIG_MIPS32_N32 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_instance="N32" missing_syscalls_flags="-mabi=n32" endif ifdef CONFIG_MIPS32_O32 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_instance="O32" missing_syscalls_flags="-mabi=32" endif install: $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE) ifdef CONFIG_SYS_SUPPORTS_ZBOOT $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE) endif $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE) $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE) archheaders: $(Q)$(MAKE) $(build)=arch/mips/kernel/syscalls all define archhelp echo ' install - install kernel into $(INSTALL_PATH)' echo ' vmlinux.ecoff - ECOFF boot image' echo ' vmlinux.bin - Raw binary boot image' echo ' vmlinux.srec - SREC boot image' echo ' vmlinux.32 - 64-bit boot image wrapped in 32bits (IP22/IP32)' echo ' vmlinuz - Compressed boot(zboot) image' echo ' vmlinuz.ecoff - ECOFF zboot image' echo ' vmlinuz.bin - Raw binary zboot image' echo ' vmlinuz.srec - SREC zboot image' echo ' uImage - U-Boot image' echo ' uImage.bin - U-Boot image (uncompressed)' echo ' uImage.bz2 - U-Boot image (bz2)' echo ' uImage.gz - U-Boot image (gzip)' echo ' uImage.lzma - U-Boot image (lzma)' echo ' uImage.lzo - U-Boot image (lzo)' echo ' uzImage.bin - U-Boot image (self-extracting)' echo echo ' These will be default as appropriate for a configured platform.' echo echo ' If you are targeting a system supported by generic kernels you may' echo ' configure the kernel for a given architecture target like so:' echo echo ' {micro32,32,64}{r1,r2,r6}{el,}_defconfig <BOARDS="list of boards">' echo echo ' Where BOARDS is some subset of the following:' for board in $(sort $(BOARDS)); do echo " $${board}"; done echo echo ' Specifically the following generic default configurations are' echo ' supported:' echo $(foreach cfg,$(generic_defconfigs), printf " %-24s - Build generic kernel for $(call describe_generic_defconfig,$(cfg))\n" $(cfg);) echo echo ' The following legacy default configurations have been converted to' echo ' generic and can still be used:' echo $(foreach cfg,$(sort $(legacy_defconfigs)), printf " %-24s - Build $($(cfg)-y)\n" $(cfg);) echo echo ' Otherwise, the following default configurations are available:' endef generic_config_dir = $(srctree)/arch/$(ARCH)/configs/generic generic_defconfigs := # # If the user generates a generic kernel configuration without specifying a # list of boards to include the config fragments for, default to including all # available board config fragments. # ifeq ($(BOARDS),) BOARDS = $(patsubst board-%.config,%,$(notdir $(wildcard $(generic_config_dir)/board-*.config))) endif # # Generic kernel configurations which merge generic_defconfig with the # appropriate config fragments from arch/mips/configs/generic/, resulting in # the ability to easily configure the kernel for a given architecture, # endianness & set of boards without duplicating the needed configuration in # hundreds of defconfig files. #