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468 lines
16 KiB
468 lines
16 KiB
# This file is included by the global makefile so that you can add your own |
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# architecture-specific flags and dependencies. Remember to do have actions |
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# for "archclean" and "archdep" for cleaning up and making dependencies for |
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# this architecture. |
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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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|
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HAS_BIARCH := $(call cc-option-yn, -m32) |
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|
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# Set default 32 bits cross compilers for vdso and boot wrapper |
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CROSS32_COMPILE ?= |
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ifeq ($(HAS_BIARCH),y) |
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ifeq ($(CROSS32_COMPILE),) |
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ifdef CONFIG_PPC32 |
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# These options will be overridden by any -mcpu option that the CPU |
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# or platform code sets later on the command line, but they are needed |
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# to set a sane 32-bit cpu target for the 64-bit cross compiler which |
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# may default to the wrong ISA. |
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KBUILD_CFLAGS += -mcpu=powerpc |
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KBUILD_AFLAGS += -mcpu=powerpc |
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endif |
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endif |
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endif |
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ifdef CONFIG_PPC_BOOK3S_32 |
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KBUILD_CFLAGS += -mcpu=powerpc |
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endif |
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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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# XXX This needs to be before we override LD below |
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ifdef CONFIG_PPC32 |
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KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o |
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else |
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ifeq ($(call ld-ifversion, -ge, 22500, y),y) |
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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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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_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1) |
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cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mcall-aixdesc) |
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aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1) |
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aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -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$(BITS) -Wl,-a$(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 := $(LDFLAGS_vmlinux-y) |
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ifdef CONFIG_PPC64 |
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ifeq ($(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) := $(call cc-option,-mtraceback=no) |
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ifndef CONFIG_CC_IS_CLANG |
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ifdef CONFIG_CPU_LITTLE_ENDIAN |
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CFLAGS-$(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) += $(call cc-option,-mno-readonly-in-sdata) |
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ifdef CONFIG_PPC_BOOK3S_64 |
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ifdef CONFIG_CPU_LITTLE_ENDIAN |
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CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8 |
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CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power9,-mtune=power8) |
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else |
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CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5)) |
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CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mcpu=power5,-mcpu=power4) |
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endif |
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else |
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CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64 |
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endif |
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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) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU)) |
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# Altivec option not allowed with e500mc64 in GCC. |
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ifdef CONFIG_ALTIVEC |
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E5500_CPU := -mcpu=powerpc64 |
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else |
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E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64) |
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endif |
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CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU) |
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CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU)) |
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ifdef CONFIG_PPC32 |
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ifdef CONFIG_PPC_E500MC |
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CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc) |
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else |
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CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc) |
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endif |
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endif |
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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 AltiVec or VSX 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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# 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_40x) += -Wa,-m405 |
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cpu-as-$(CONFIG_44x) += -Wa,-m440 |
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cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec) |
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cpu-as-$(CONFIG_E500) += -Wa,-me500 |
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# When using '-many -mpower4' gas will first try and find a matching power4 |
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# mnemonic and failing that it will allow any valid mnemonic that GAS knows |
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# about. GCC will pass -many to GAS when assembling, clang does not. |
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cpu-as-$(CONFIG_PPC_BOOK3S_64) += -Wa,-mpower4 -Wa,-many |
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cpu-as-$(CONFIG_PPC_E500MC) += $(call as-option,-Wa$(comma)-me500mc) |
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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 += $(cflags-y) |
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head-$(CONFIG_PPC64) := arch/powerpc/kernel/head_64.o |
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head-$(CONFIG_PPC_BOOK3S_32) := arch/powerpc/kernel/head_book3s_32.o |
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head-$(CONFIG_PPC_8xx) := arch/powerpc/kernel/head_8xx.o |
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head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o |
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head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o |
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head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o |
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head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o |
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head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o |
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head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o |
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head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o |
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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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$(Q)$(MAKE) $(build)=$(boot) install |
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archclean: |
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$(Q)$(MAKE) $(clean)=$(boot) |
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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/vdso32 include/generated/vdso32-offsets.h) |
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$(if $(CONFIG_PPC64),$(Q)$(MAKE) \ |
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$(build)=arch/powerpc/kernel/vdso64 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 $$3;}' include/generated/asm-offsets.h)) |
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endif |
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endif |
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ifdef CONFIG_SMP |
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ifdef CONFIG_PPC32 |
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prepare: task_cpu_prepare |
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PHONY += task_cpu_prepare |
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task_cpu_prepare: prepare0 |
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$(eval KBUILD_CFLAGS += -D_TASK_CPU=$(shell awk '{if ($$2 == "TASK_CPU") print $$3;}' include/generated/asm-offsets.h)) |
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|
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endif # CONFIG_PPC32 |
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endif # CONFIG_SMP |
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PHONY += checkbin |
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# Check toolchain versions: |
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# - gcc-4.6 is the minimum kernel-wide version so nothing required. |
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checkbin: |
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@if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \ |
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&& $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \ |
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echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \ |
|
echo 'in some circumstances.' ; \ |
|
echo -n '*** Please use a different binutils version.' ; \ |
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false ; \ |
|
fi
|
|
|