398 lines
13 KiB
Makefile
398 lines
13 KiB
Makefile
# This file is included by the global makefile so that you can add your own
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# architecture-specific flags and dependencies.
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#
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# This file is subject to the terms and conditions of the GNU General Public
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# License. See the file "COPYING" in the main directory of this archive
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# for more details.
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#
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# Copyright (C) 1994 by Linus Torvalds
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# Changes for PPC by Gary Thomas
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# Rewritten by Cort Dougan and Paul Mackerras
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#
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HAS_BIARCH := $(call cc-option-yn, -m32)
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# Set default 32 bits cross compilers for vdso and boot wrapper
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CROSS32_COMPILE ?=
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# If we're on a ppc/ppc64/ppc64le machine use that defconfig, otherwise just use
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# ppc64_defconfig because we have nothing better to go on.
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uname := $(shell uname -m)
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KBUILD_DEFCONFIG := $(if $(filter ppc%,$(uname)),$(uname),ppc64)_defconfig
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new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
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ifeq ($(new_nm),y)
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NM := $(NM) --synthetic
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endif
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# BITS is used as extension for files which are available in a 32 bit
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# and a 64 bit version to simplify shared Makefiles.
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# e.g.: obj-y += foo_$(BITS).o
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export BITS
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ifdef CONFIG_PPC64
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BITS := 64
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else
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BITS := 32
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endif
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machine-y = ppc
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machine-$(CONFIG_PPC64) += 64
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machine-$(CONFIG_CPU_LITTLE_ENDIAN) += le
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UTS_MACHINE := $(subst $(space),,$(machine-y))
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ifeq ($(CONFIG_PPC64)$(CONFIG_LD_IS_BFD),yy)
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# Have the linker provide sfpr if possible.
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# There is a corresponding test in arch/powerpc/lib/Makefile
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KBUILD_LDFLAGS_MODULE += --save-restore-funcs
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else
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KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
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endif
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ifdef CONFIG_CPU_LITTLE_ENDIAN
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KBUILD_CFLAGS += -mlittle-endian
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KBUILD_LDFLAGS += -EL
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LDEMULATION := lppc
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GNUTARGET := powerpcle
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MULTIPLEWORD := -mno-multiple
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KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect)
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else
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KBUILD_CFLAGS += $(call cc-option,-mbig-endian)
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KBUILD_LDFLAGS += -EB
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LDEMULATION := ppc
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GNUTARGET := powerpc
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MULTIPLEWORD := -mmultiple
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endif
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ifdef CONFIG_PPC64
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ifndef CONFIG_CC_IS_CLANG
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cflags-$(CONFIG_PPC64_ELF_ABI_V1) += $(call cc-option,-mabi=elfv1)
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cflags-$(CONFIG_PPC64_ELF_ABI_V1) += $(call cc-option,-mcall-aixdesc)
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aflags-$(CONFIG_PPC64_ELF_ABI_V1) += $(call cc-option,-mabi=elfv1)
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aflags-$(CONFIG_PPC64_ELF_ABI_V2) += -mabi=elfv2
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endif
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endif
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ifndef CONFIG_CC_IS_CLANG
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cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align
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endif
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cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
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cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
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aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
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aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
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ifeq ($(HAS_BIARCH),y)
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KBUILD_CFLAGS += -m$(BITS)
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KBUILD_AFLAGS += -m$(BITS)
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KBUILD_LDFLAGS += -m elf$(BITS)$(LDEMULATION)
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endif
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cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard=tls
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ifdef CONFIG_PPC64
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cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r13
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else
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cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r2
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endif
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LDFLAGS_vmlinux-y := -Bstatic
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LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
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LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) += -z notext
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LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y)
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ifdef CONFIG_PPC64
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ifeq ($(call cc-option-yn,-mcmodel=medium),y)
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# -mcmodel=medium breaks modules because it uses 32bit offsets from
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# the TOC pointer to create pointers where possible. Pointers into the
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# percpu data area are created by this method.
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#
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# The kernel module loader relocates the percpu data section from the
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# original location (starting with 0xd...) to somewhere in the base
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# kernel percpu data space (starting with 0xc...). We need a full
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# 64bit relocation for this to work, hence -mcmodel=large.
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KBUILD_CFLAGS_MODULE += -mcmodel=large
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else
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export NO_MINIMAL_TOC := -mno-minimal-toc
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endif
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endif
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CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no)
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ifndef CONFIG_CC_IS_CLANG
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ifdef CONFIG_PPC64_ELF_ABI_V2
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CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc))
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AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2)
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else
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CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
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CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc)
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AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
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endif
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endif
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CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc))
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CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions)
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# Clang unconditionally reserves r2 on ppc32 and does not support the flag
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# https://bugs.llvm.org/show_bug.cgi?id=39555
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CFLAGS-$(CONFIG_PPC32) := $(call cc-option, -ffixed-r2)
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# Clang doesn't support -mmultiple / -mno-multiple
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# https://bugs.llvm.org/show_bug.cgi?id=39556
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CFLAGS-$(CONFIG_PPC32) += $(call cc-option, $(MULTIPLEWORD))
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CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata)
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ifdef CONFIG_FUNCTION_TRACER
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CC_FLAGS_FTRACE := -pg
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ifdef CONFIG_MPROFILE_KERNEL
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CC_FLAGS_FTRACE += -mprofile-kernel
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endif
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endif
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CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += -mcpu=$(CONFIG_TARGET_CPU)
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AFLAGS-$(CONFIG_TARGET_CPU_BOOL) += -mcpu=$(CONFIG_TARGET_CPU)
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CFLAGS-$(CONFIG_POWERPC64_CPU) += $(call cc-option,-mtune=power10, \
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$(call cc-option,-mtune=power9, \
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$(call cc-option,-mtune=power8)))
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asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
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KBUILD_CPPFLAGS += -I $(srctree)/arch/$(ARCH) $(asinstr)
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KBUILD_AFLAGS += $(AFLAGS-y)
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KBUILD_CFLAGS += $(call cc-option,-msoft-float)
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KBUILD_CFLAGS += -pipe $(CFLAGS-y)
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CPP = $(CC) -E $(KBUILD_CFLAGS)
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CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__
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ifdef CONFIG_CPU_BIG_ENDIAN
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CHECKFLAGS += -D__BIG_ENDIAN__
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else
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CHECKFLAGS += -D__LITTLE_ENDIAN__
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endif
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ifdef CONFIG_476FPE_ERR46
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KBUILD_LDFLAGS_MODULE += --ppc476-workaround \
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-T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds
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endif
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# No prefix or pcrel
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KBUILD_CFLAGS += $(call cc-option,-mno-prefixed)
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KBUILD_CFLAGS += $(call cc-option,-mno-pcrel)
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# No AltiVec or VSX or MMA instructions when building kernel
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KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
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KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
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KBUILD_CFLAGS += $(call cc-option,-mno-mma)
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# No SPE instruction when building kernel
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# (We use all available options to help semi-broken compilers)
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KBUILD_CFLAGS += $(call cc-option,-mno-spe)
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KBUILD_CFLAGS += $(call cc-option,-mspe=no)
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# Don't emit .eh_frame since we have no use for it
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KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
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# Never use string load/store instructions as they are
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# often slow when they are implemented at all
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KBUILD_CFLAGS += $(call cc-option,-mno-string)
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cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec)
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# When using '-many -mpower4' gas will first try and find a matching power4
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# mnemonic and failing that it will allow any valid mnemonic that GAS knows
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# about. GCC will pass -many to GAS when assembling, clang does not.
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# LLVM IAS doesn't understand either flag: https://github.com/ClangBuiltLinux/linux/issues/675
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# but LLVM IAS only supports ISA >= 2.06 for Book3S 64 anyway...
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cpu-as-$(CONFIG_PPC_BOOK3S_64) += $(call as-option,-Wa$(comma)-mpower4) $(call as-option,-Wa$(comma)-many)
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KBUILD_AFLAGS += $(cpu-as-y)
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KBUILD_CFLAGS += $(cpu-as-y)
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KBUILD_AFLAGS += $(aflags-y)
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KBUILD_CFLAGS += $(cflags-y)
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# Default to zImage, override when needed
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all: zImage
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# With make 3.82 we cannot mix normal and wildcard targets
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BOOT_TARGETS1 := zImage zImage.initrd uImage
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BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
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PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
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boot := arch/$(ARCH)/boot
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$(BOOT_TARGETS1): vmlinux
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$(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
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$(BOOT_TARGETS2): vmlinux
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$(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
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PHONY += bootwrapper_install
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bootwrapper_install:
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$(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
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# Used to create 'merged defconfigs'
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# To use it $(call) it with the first argument as the base defconfig
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# and the second argument as a space separated list of .config files to merge,
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# without the .config suffix.
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define merge_into_defconfig
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$(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
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-m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \
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$(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config)
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+$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
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endef
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PHONY += pseries_le_defconfig
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pseries_le_defconfig:
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$(call merge_into_defconfig,pseries_defconfig,le)
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PHONY += ppc64le_defconfig
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ppc64le_defconfig:
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$(call merge_into_defconfig,ppc64_defconfig,le)
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PHONY += ppc64le_guest_defconfig
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ppc64le_guest_defconfig:
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$(call merge_into_defconfig,ppc64_defconfig,le guest)
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PHONY += ppc64_guest_defconfig
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ppc64_guest_defconfig:
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$(call merge_into_defconfig,ppc64_defconfig,be guest)
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PHONY += powernv_be_defconfig
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powernv_be_defconfig:
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$(call merge_into_defconfig,powernv_defconfig,be)
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PHONY += mpc85xx_defconfig
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mpc85xx_defconfig:
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$(call merge_into_defconfig,mpc85xx_base.config,\
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85xx-32bit 85xx-hw fsl-emb-nonhw)
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PHONY += mpc85xx_smp_defconfig
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mpc85xx_smp_defconfig:
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$(call merge_into_defconfig,mpc85xx_base.config,\
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85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)
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PHONY += corenet32_smp_defconfig
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corenet32_smp_defconfig:
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$(call merge_into_defconfig,corenet_base.config,\
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85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa)
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PHONY += corenet64_smp_defconfig
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corenet64_smp_defconfig:
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$(call merge_into_defconfig,corenet_base.config,\
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85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa)
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PHONY += mpc86xx_defconfig
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mpc86xx_defconfig:
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$(call merge_into_defconfig,mpc86xx_base.config,\
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86xx-hw fsl-emb-nonhw)
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PHONY += mpc86xx_smp_defconfig
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mpc86xx_smp_defconfig:
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$(call merge_into_defconfig,mpc86xx_base.config,\
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86xx-smp 86xx-hw fsl-emb-nonhw)
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PHONY += ppc32_allmodconfig
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ppc32_allmodconfig:
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$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \
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-f $(srctree)/Makefile allmodconfig
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PHONY += ppc_defconfig
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ppc_defconfig:
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$(call merge_into_defconfig,book3s_32.config,)
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PHONY += ppc64le_allmodconfig
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ppc64le_allmodconfig:
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$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \
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-f $(srctree)/Makefile allmodconfig
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PHONY += ppc64le_allnoconfig
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ppc64le_allnoconfig:
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$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/ppc64le.config \
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-f $(srctree)/Makefile allnoconfig
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PHONY += ppc64_book3e_allmodconfig
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ppc64_book3e_allmodconfig:
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$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \
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-f $(srctree)/Makefile allmodconfig
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PHONY += ppc32_randconfig
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ppc32_randconfig:
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$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/32-bit.config \
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-f $(srctree)/Makefile randconfig
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PHONY += ppc64_randconfig
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ppc64_randconfig:
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$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/64-bit.config \
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-f $(srctree)/Makefile randconfig
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define archhelp
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@echo '* zImage - Build default images selected by kernel config'
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@echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
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@echo ' uImage - U-Boot native image format'
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@echo ' cuImage.<dt> - Backwards compatible U-Boot image for older'
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@echo ' versions which do not support device trees'
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@echo ' dtbImage.<dt> - zImage with an embedded device tree blob'
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@echo ' simpleImage.<dt> - Firmware independent image.'
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@echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)'
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@echo ' install - Install kernel using'
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@echo ' (your) ~/bin/$(INSTALLKERNEL) or'
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@echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
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@echo ' install to $$(INSTALL_PATH) and run lilo'
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@echo ' *_defconfig - Select default config from arch/$(ARCH)/configs'
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@echo ''
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@echo ' Targets with <dt> embed a device tree blob inside the image'
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@echo ' These targets support board with firmware that does not'
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@echo ' support passing a device tree directly. Replace <dt> with the'
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@echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
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@echo ' (minus the .dts extension).'
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endef
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PHONY += install
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install:
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$(call cmd,install)
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ifeq ($(KBUILD_EXTMOD),)
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# We need to generate vdso-offsets.h before compiling certain files in kernel/.
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# In order to do that, we should use the archprepare target, but we can't since
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# asm-offsets.h is included in some files used to generate vdso-offsets.h, and
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# asm-offsets.h is built in prepare0, for which archprepare is a dependency.
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# Therefore we need to generate the header after prepare0 has been made, hence
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# this hack.
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prepare: vdso_prepare
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vdso_prepare: prepare0
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$(if $(CONFIG_VDSO32),$(Q)$(MAKE) \
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$(build)=arch/powerpc/kernel/vdso include/generated/vdso32-offsets.h)
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$(if $(CONFIG_PPC64),$(Q)$(MAKE) \
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$(build)=arch/powerpc/kernel/vdso include/generated/vdso64-offsets.h)
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endif
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archprepare: checkbin
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archheaders:
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$(Q)$(MAKE) $(build)=arch/powerpc/kernel/syscalls all
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ifdef CONFIG_STACKPROTECTOR
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prepare: stack_protector_prepare
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PHONY += stack_protector_prepare
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stack_protector_prepare: prepare0
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ifdef CONFIG_PPC64
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$(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' include/generated/asm-offsets.h))
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else
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$(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' include/generated/asm-offsets.h))
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endif
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endif
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PHONY += checkbin
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checkbin:
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@if test "x${CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT}" = "xy" -a \
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"x${CONFIG_LD_IS_BFD}" = "xy" -a \
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"${CONFIG_LD_VERSION}" = "23700" ; then \
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echo -n '*** binutils 2.37 drops unused section symbols, which recordmcount ' ; \
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echo 'is unable to handle.' ; \
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echo '*** Please use a different binutils version.' ; \
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false ; \
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fi
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