1 # This file is included by the global makefile so that you can add your own
2 # architecture-specific flags and dependencies.
4 # This file is subject to the terms and conditions of the GNU General Public
5 # License. See the file "COPYING" in the main directory of this archive
8 # Copyright (C) 1994 by Linus Torvalds
9 # Changes for PPC by Gary Thomas
10 # Rewritten by Cort Dougan and Paul Mackerras
13 HAS_BIARCH
:= $(call cc-option-yn
, -m32
)
15 # Set default 32 bits cross compilers for vdso and boot wrapper
18 ifeq ($(HAS_BIARCH
),y
)
19 ifeq ($(CROSS32_COMPILE
),)
21 # These options will be overridden by any -mcpu option that the CPU
22 # or platform code sets later on the command line, but they are needed
23 # to set a sane 32-bit cpu target for the 64-bit cross compiler which
24 # may default to the wrong ISA.
25 KBUILD_CFLAGS
+= -mcpu
=powerpc
26 KBUILD_AFLAGS
+= -mcpu
=powerpc
31 ifdef CONFIG_PPC_BOOK3S_32
32 KBUILD_CFLAGS
+= -mcpu
=powerpc
35 # If we're on a ppc/ppc64/ppc64le machine use that defconfig, otherwise just use
36 # ppc64_defconfig because we have nothing better to go on.
37 uname
:= $(shell uname
-m
)
38 KBUILD_DEFCONFIG
:= $(if
$(filter ppc
%,$(uname
)),$(uname
),ppc64
)_defconfig
40 new_nm
:= $(shell if
$(NM
) --help
2>&1 | grep
-- '--synthetic' > /dev
/null
; then echo y
; else echo n
; fi
)
43 NM
:= $(NM
) --synthetic
46 # BITS is used as extension for files which are available in a 32 bit
47 # and a 64 bit version to simplify shared Makefiles.
48 # e.g.: obj-y += foo_$(BITS).o
58 machine-
$(CONFIG_PPC64
) += 64
59 machine-
$(CONFIG_CPU_LITTLE_ENDIAN
) += le
60 UTS_MACHINE
:= $(subst $(space
),,$(machine-y
))
62 # XXX This needs to be before we override LD below
64 KBUILD_LDFLAGS_MODULE
+= arch
/powerpc
/lib
/crtsavres.o
66 ifeq ($(call ld-ifversion
, -ge
, 22500, y
),y
)
67 # Have the linker provide sfpr if possible.
68 # There is a corresponding test in arch/powerpc/lib/Makefile
69 KBUILD_LDFLAGS_MODULE
+= --save-restore-funcs
71 KBUILD_LDFLAGS_MODULE
+= arch
/powerpc
/lib
/crtsavres.o
75 ifdef CONFIG_CPU_LITTLE_ENDIAN
76 KBUILD_CFLAGS
+= -mlittle-endian
79 GNUTARGET
:= powerpcle
80 MULTIPLEWORD
:= -mno-multiple
81 KBUILD_CFLAGS_MODULE
+= $(call cc-option
,-mno-save-toc-indirect
)
83 KBUILD_CFLAGS
+= $(call cc-option
,-mbig-endian
)
87 MULTIPLEWORD
:= -mmultiple
91 ifndef CONFIG_CC_IS_CLANG
92 cflags-
$(CONFIG_PPC64_ELF_ABI_V1
) += $(call cc-option
,-mabi
=elfv1
)
93 cflags-
$(CONFIG_PPC64_ELF_ABI_V1
) += $(call cc-option
,-mcall-aixdesc
)
94 aflags-
$(CONFIG_PPC64_ELF_ABI_V1
) += $(call cc-option
,-mabi
=elfv1
)
95 aflags-
$(CONFIG_PPC64_ELF_ABI_V2
) += -mabi
=elfv2
99 ifndef CONFIG_CC_IS_CLANG
100 cflags-
$(CONFIG_CPU_LITTLE_ENDIAN
) += -mno-strict-align
103 cflags-
$(CONFIG_CPU_BIG_ENDIAN
) += $(call cc-option
,-mbig-endian
)
104 cflags-
$(CONFIG_CPU_LITTLE_ENDIAN
) += -mlittle-endian
105 aflags-
$(CONFIG_CPU_BIG_ENDIAN
) += $(call cc-option
,-mbig-endian
)
106 aflags-
$(CONFIG_CPU_LITTLE_ENDIAN
) += -mlittle-endian
108 ifeq ($(HAS_BIARCH
),y
)
109 KBUILD_CFLAGS
+= -m
$(BITS
)
110 KBUILD_AFLAGS
+= -m
$(BITS
) -Wl
,-a
$(BITS
)
111 KBUILD_LDFLAGS
+= -m elf
$(BITS
)$(LDEMULATION
)
114 cflags-
$(CONFIG_STACKPROTECTOR
) += -mstack-protector-guard
=tls
116 cflags-
$(CONFIG_STACKPROTECTOR
) += -mstack-protector-guard-reg
=r13
118 cflags-
$(CONFIG_STACKPROTECTOR
) += -mstack-protector-guard-reg
=r2
121 LDFLAGS_vmlinux-y
:= -Bstatic
122 LDFLAGS_vmlinux-
$(CONFIG_RELOCATABLE
) := -pie
123 LDFLAGS_vmlinux-
$(CONFIG_RELOCATABLE
) += -z notext
124 LDFLAGS_vmlinux
:= $(LDFLAGS_vmlinux-y
)
127 ifeq ($(call cc-option-yn
,-mcmodel
=medium
),y
)
128 # -mcmodel=medium breaks modules because it uses 32bit offsets from
129 # the TOC pointer to create pointers where possible. Pointers into the
130 # percpu data area are created by this method.
132 # The kernel module loader relocates the percpu data section from the
133 # original location (starting with 0xd...) to somewhere in the base
134 # kernel percpu data space (starting with 0xc...). We need a full
135 # 64bit relocation for this to work, hence -mcmodel=large.
136 KBUILD_CFLAGS_MODULE
+= -mcmodel
=large
138 export NO_MINIMAL_TOC
:= -mno-minimal-toc
142 CFLAGS-
$(CONFIG_PPC64
) := $(call cc-option
,-mtraceback
=no
)
143 ifndef CONFIG_CC_IS_CLANG
144 ifdef CONFIG_PPC64_ELF_ABI_V2
145 CFLAGS-
$(CONFIG_PPC64
) += $(call cc-option
,-mabi
=elfv2
,$(call cc-option
,-mcall-aixdesc
))
146 AFLAGS-
$(CONFIG_PPC64
) += $(call cc-option
,-mabi
=elfv2
)
148 CFLAGS-
$(CONFIG_PPC64
) += $(call cc-option
,-mabi
=elfv1
)
149 CFLAGS-
$(CONFIG_PPC64
) += $(call cc-option
,-mcall-aixdesc
)
150 AFLAGS-
$(CONFIG_PPC64
) += $(call cc-option
,-mabi
=elfv1
)
153 CFLAGS-
$(CONFIG_PPC64
) += $(call cc-option
,-mcmodel
=medium
,$(call cc-option
,-mminimal-toc
))
154 CFLAGS-
$(CONFIG_PPC64
) += $(call cc-option
,-mno-pointers-to-nested-functions
)
156 # Clang unconditionally reserves r2 on ppc32 and does not support the flag
157 # https://bugs.llvm.org/show_bug.cgi?id=39555
158 CFLAGS-
$(CONFIG_PPC32
) := $(call cc-option
, -ffixed-r2
)
160 # Clang doesn't support -mmultiple / -mno-multiple
161 # https://bugs.llvm.org/show_bug.cgi?id=39556
162 CFLAGS-
$(CONFIG_PPC32
) += $(call cc-option
, $(MULTIPLEWORD
))
164 CFLAGS-
$(CONFIG_PPC32
) += $(call cc-option
,-mno-readonly-in-sdata
)
166 ifdef CONFIG_PPC_BOOK3S_64
167 ifdef CONFIG_CPU_LITTLE_ENDIAN
168 CFLAGS-
$(CONFIG_GENERIC_CPU
) += -mcpu
=power8
169 CFLAGS-
$(CONFIG_GENERIC_CPU
) += $(call cc-option
,-mtune
=power9
,-mtune
=power8
)
171 CFLAGS-
$(CONFIG_GENERIC_CPU
) += $(call cc-option
,-mtune
=power7
,$(call cc-option
,-mtune
=power5
))
172 CFLAGS-
$(CONFIG_GENERIC_CPU
) += $(call cc-option
,-mcpu
=power5
,-mcpu
=power4
)
174 else ifdef CONFIG_PPC_BOOK3E_64
175 CFLAGS-
$(CONFIG_GENERIC_CPU
) += -mcpu
=powerpc64
178 ifdef CONFIG_FUNCTION_TRACER
179 CC_FLAGS_FTRACE
:= -pg
180 ifdef CONFIG_MPROFILE_KERNEL
181 CC_FLAGS_FTRACE
+= -mprofile-kernel
185 CFLAGS-
$(CONFIG_TARGET_CPU_BOOL
) += $(call cc-option
,-mcpu
=$(CONFIG_TARGET_CPU
))
187 # Altivec option not allowed with e500mc64 in GCC.
189 E5500_CPU
:= -mcpu
=powerpc64
191 E5500_CPU
:= $(call cc-option
,-mcpu
=e500mc64
,-mcpu
=powerpc64
)
193 CFLAGS-
$(CONFIG_E5500_CPU
) += $(E5500_CPU
)
194 CFLAGS-
$(CONFIG_E6500_CPU
) += $(call cc-option
,-mcpu
=e6500
,$(E5500_CPU
))
197 ifdef CONFIG_PPC_E500MC
198 CFLAGS-y
+= $(call cc-option
,-mcpu
=e500mc
,-mcpu
=powerpc
)
200 CFLAGS-
$(CONFIG_E500
) += $(call cc-option
,-mcpu
=8540 -msoft-float
,-mcpu
=powerpc
)
204 asinstr
:= $(call as-instr
,lis
9$(comma
)foo@high
,-DHAVE_AS_ATHIGH
=1)
206 KBUILD_CPPFLAGS
+= -I
$(srctree
)/arch
/$(ARCH
) $(asinstr
)
207 KBUILD_AFLAGS
+= $(AFLAGS-y
)
208 KBUILD_CFLAGS
+= $(call cc-option
,-msoft-float
)
209 KBUILD_CFLAGS
+= -pipe
$(CFLAGS-y
)
210 CPP
= $(CC
) -E
$(KBUILD_CFLAGS
)
212 CHECKFLAGS
+= -m
$(BITS
) -D__powerpc__
-D__powerpc
$(BITS
)__
213 ifdef CONFIG_CPU_BIG_ENDIAN
214 CHECKFLAGS
+= -D__BIG_ENDIAN__
216 CHECKFLAGS
+= -D__LITTLE_ENDIAN__
219 ifdef CONFIG_476FPE_ERR46
220 KBUILD_LDFLAGS_MODULE
+= --ppc476-workaround \
221 -T
$(srctree
)/arch
/powerpc
/platforms
/44x
/ppc476_modules.lds
224 # No AltiVec or VSX instructions when building kernel
225 KBUILD_CFLAGS
+= $(call cc-option
,-mno-altivec
)
226 KBUILD_CFLAGS
+= $(call cc-option
,-mno-vsx
)
228 # No SPE instruction when building kernel
229 # (We use all available options to help semi-broken compilers)
230 KBUILD_CFLAGS
+= $(call cc-option
,-mno-spe
)
231 KBUILD_CFLAGS
+= $(call cc-option
,-mspe
=no
)
233 # Don't emit .eh_frame since we have no use for it
234 KBUILD_CFLAGS
+= -fno-asynchronous-unwind-tables
236 # Never use string load/store instructions as they are
237 # often slow when they are implemented at all
238 KBUILD_CFLAGS
+= $(call cc-option
,-mno-string
)
240 cpu-as-
$(CONFIG_40x
) += -Wa
,-m405
241 cpu-as-
$(CONFIG_44x
) += -Wa
,-m440
242 cpu-as-
$(CONFIG_ALTIVEC
) += $(call as-option
,-Wa
$(comma
)-maltivec
)
243 cpu-as-
$(CONFIG_E500
) += -Wa
,-me500
245 # When using '-many -mpower4' gas will first try and find a matching power4
246 # mnemonic and failing that it will allow any valid mnemonic that GAS knows
247 # about. GCC will pass -many to GAS when assembling, clang does not.
248 # LLVM IAS doesn't understand either flag: https://github.com/ClangBuiltLinux/linux/issues/675
249 # but LLVM IAS only supports ISA >= 2.06 for Book3S 64 anyway...
250 cpu-as-
$(CONFIG_PPC_BOOK3S_64
) += $(call as-option
,-Wa
$(comma
)-mpower4
) $(call as-option
,-Wa
$(comma
)-many
)
251 cpu-as-
$(CONFIG_PPC_E500MC
) += $(call as-option
,-Wa
$(comma
)-me500mc
)
253 KBUILD_AFLAGS
+= $(cpu-as-y
)
254 KBUILD_CFLAGS
+= $(cpu-as-y
)
256 KBUILD_AFLAGS
+= $(aflags-y
)
257 KBUILD_CFLAGS
+= $(cflags-y
)
259 head-
$(CONFIG_PPC64
) := arch
/powerpc
/kernel
/head_64.o
260 head-
$(CONFIG_PPC_BOOK3S_32
) := arch
/powerpc
/kernel
/head_book3s_32.o
261 head-
$(CONFIG_PPC_8xx
) := arch
/powerpc
/kernel
/head_8xx.o
262 head-
$(CONFIG_40x
) := arch
/powerpc
/kernel
/head_40x.o
263 head-
$(CONFIG_44x
) := arch
/powerpc
/kernel
/head_44x.o
264 head-
$(CONFIG_FSL_BOOKE
) := arch
/powerpc
/kernel
/head_fsl_booke.o
266 head-
$(CONFIG_PPC64
) += arch
/powerpc
/kernel
/entry_64.o
267 head-
$(CONFIG_PPC_FPU
) += arch
/powerpc
/kernel
/fpu.o
268 head-
$(CONFIG_ALTIVEC
) += arch
/powerpc
/kernel
/vector.o
269 head-
$(CONFIG_PPC_OF_BOOT_TRAMPOLINE
) += arch
/powerpc
/kernel
/prom_init.o
271 # Default to zImage, override when needed
274 # With make 3.82 we cannot mix normal and wildcard targets
275 BOOT_TARGETS1
:= zImage zImage.initrd uImage
276 BOOT_TARGETS2
:= zImage
% dtbImage
% treeImage.
% cuImage.
% simpleImage.
% uImage.
%
278 PHONY
+= $(BOOT_TARGETS1
) $(BOOT_TARGETS2
)
280 boot
:= arch
/$(ARCH
)/boot
282 $(BOOT_TARGETS1
): vmlinux
283 $(Q
)$(MAKE
) $(build
)=$(boot
) $(patsubst %,$(boot
)/%,$@
)
284 $(BOOT_TARGETS2
): vmlinux
285 $(Q
)$(MAKE
) $(build
)=$(boot
) $(patsubst %,$(boot
)/%,$@
)
288 PHONY
+= bootwrapper_install
290 $(Q
)$(MAKE
) $(build
)=$(boot
) $(patsubst %,$(boot
)/%,$@
)
292 # Used to create 'merged defconfigs'
293 # To use it $(call) it with the first argument as the base defconfig
294 # and the second argument as a space separated list of .config files to merge,
295 # without the .config suffix.
296 define merge_into_defconfig
297 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/kconfig
/merge_config.sh \
298 -m
-O
$(objtree
) $(srctree
)/arch
/$(ARCH
)/configs
/$(1) \
299 $(foreach config
,$(2),$(srctree
)/arch
/$(ARCH
)/configs
/$(config
).config
)
300 +$(Q
)$(MAKE
) -f
$(srctree
)/Makefile olddefconfig
303 PHONY
+= pseries_le_defconfig
304 pseries_le_defconfig
:
305 $(call merge_into_defconfig
,pseries_defconfig
,le
)
307 PHONY
+= ppc64le_defconfig
309 $(call merge_into_defconfig
,ppc64_defconfig
,le
)
311 PHONY
+= ppc64le_guest_defconfig
312 ppc64le_guest_defconfig
:
313 $(call merge_into_defconfig
,ppc64_defconfig
,le guest
)
315 PHONY
+= ppc64_guest_defconfig
316 ppc64_guest_defconfig
:
317 $(call merge_into_defconfig
,ppc64_defconfig
,be guest
)
319 PHONY
+= powernv_be_defconfig
320 powernv_be_defconfig
:
321 $(call merge_into_defconfig
,powernv_defconfig
,be
)
323 PHONY
+= mpc85xx_defconfig
325 $(call merge_into_defconfig
,mpc85xx_base.config
,\
326 85xx-32bit
85xx-hw fsl-emb-nonhw
)
328 PHONY
+= mpc85xx_smp_defconfig
329 mpc85xx_smp_defconfig
:
330 $(call merge_into_defconfig
,mpc85xx_base.config
,\
331 85xx-32bit
85xx-smp
85xx-hw fsl-emb-nonhw
)
333 PHONY
+= corenet32_smp_defconfig
334 corenet32_smp_defconfig
:
335 $(call merge_into_defconfig
,corenet_base.config
,\
336 85xx-32bit
85xx-smp
85xx-hw fsl-emb-nonhw dpaa
)
338 PHONY
+= corenet64_smp_defconfig
339 corenet64_smp_defconfig
:
340 $(call merge_into_defconfig
,corenet_base.config
,\
341 85xx-64bit
85xx-smp altivec
85xx-hw fsl-emb-nonhw dpaa
)
343 PHONY
+= mpc86xx_defconfig
345 $(call merge_into_defconfig
,mpc86xx_base.config
,\
346 86xx-hw fsl-emb-nonhw
)
348 PHONY
+= mpc86xx_smp_defconfig
349 mpc86xx_smp_defconfig
:
350 $(call merge_into_defconfig
,mpc86xx_base.config
,\
351 86xx-smp
86xx-hw fsl-emb-nonhw
)
353 PHONY
+= ppc32_allmodconfig
355 $(Q
)$(MAKE
) KCONFIG_ALLCONFIG
=$(srctree
)/arch
/powerpc
/configs
/book3s_32.config \
356 -f
$(srctree
)/Makefile allmodconfig
358 PHONY
+= ppc_defconfig
360 $(call merge_into_defconfig
,book3s_32.config
,)
362 PHONY
+= ppc64le_allmodconfig
363 ppc64le_allmodconfig
:
364 $(Q
)$(MAKE
) KCONFIG_ALLCONFIG
=$(srctree
)/arch
/powerpc
/configs
/le.config \
365 -f
$(srctree
)/Makefile allmodconfig
367 PHONY
+= ppc64le_allnoconfig
369 $(Q
)$(MAKE
) KCONFIG_ALLCONFIG
=$(srctree
)/arch
/powerpc
/configs
/ppc64le.config \
370 -f
$(srctree
)/Makefile allnoconfig
372 PHONY
+= ppc64_book3e_allmodconfig
373 ppc64_book3e_allmodconfig
:
374 $(Q
)$(MAKE
) KCONFIG_ALLCONFIG
=$(srctree
)/arch
/powerpc
/configs
/85xx-64bit.config \
375 -f
$(srctree
)/Makefile allmodconfig
377 PHONY
+= ppc32_randconfig
379 $(Q
)$(MAKE
) KCONFIG_ALLCONFIG
=$(srctree
)/arch
/powerpc
/configs
/32-bit.config \
380 -f
$(srctree
)/Makefile randconfig
382 PHONY
+= ppc64_randconfig
384 $(Q
)$(MAKE
) KCONFIG_ALLCONFIG
=$(srctree
)/arch
/powerpc
/configs
/64-bit.config \
385 -f
$(srctree
)/Makefile randconfig
388 @echo
'* zImage - Build default images selected by kernel config'
389 @echo
' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
390 @echo
' uImage - U-Boot native image format'
391 @echo
' cuImage.<dt> - Backwards compatible U-Boot image for older'
392 @echo
' versions which do not support device trees'
393 @echo
' dtbImage.<dt> - zImage with an embedded device tree blob'
394 @echo
' simpleImage.<dt> - Firmware independent image.'
395 @echo
' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)'
396 @echo
' install - Install kernel using'
397 @echo
' (your) ~/bin/$(INSTALLKERNEL) or'
398 @echo
' (distribution) /sbin/$(INSTALLKERNEL) or'
399 @echo
' install to $$(INSTALL_PATH) and run lilo'
400 @echo
' *_defconfig - Select default config from arch/$(ARCH)/configs'
402 @echo
' Targets with <dt> embed a device tree blob inside the image'
403 @echo
' These targets support board with firmware that does not'
404 @echo
' support passing a device tree directly. Replace <dt> with the'
405 @echo
' name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
406 @echo
' (minus the .dts extension).'
413 ifeq ($(KBUILD_EXTMOD
),)
414 # We need to generate vdso-offsets.h before compiling certain files in kernel/.
415 # In order to do that, we should use the archprepare target, but we can't since
416 # asm-offsets.h is included in some files used to generate vdso-offsets.h, and
417 # asm-offsets.h is built in prepare0, for which archprepare is a dependency.
418 # Therefore we need to generate the header after prepare0 has been made, hence
420 prepare
: vdso_prepare
421 vdso_prepare
: prepare0
422 $(if
$(CONFIG_VDSO32
),$(Q
)$(MAKE
) \
423 $(build
)=arch
/powerpc
/kernel
/vdso
include/generated
/vdso32-offsets.h
)
424 $(if
$(CONFIG_PPC64
),$(Q
)$(MAKE
) \
425 $(build
)=arch
/powerpc
/kernel
/vdso
include/generated
/vdso64-offsets.h
)
428 archprepare
: checkbin
431 $(Q
)$(MAKE
) $(build
)=arch
/powerpc
/kernel
/syscalls
all
433 ifdef CONFIG_STACKPROTECTOR
434 prepare
: stack_protector_prepare
436 PHONY
+= stack_protector_prepare
437 stack_protector_prepare
: prepare0
439 $(eval KBUILD_CFLAGS
+= -mstack-protector-guard-offset
=$(shell awk
'{if ($$2 == "PACA_CANARY") print $$3;}' include/generated
/asm-offsets.h
))
441 $(eval KBUILD_CFLAGS
+= -mstack-protector-guard-offset
=$(shell awk
'{if ($$2 == "TASK_CANARY") print $$3;}' include/generated
/asm-offsets.h
))
446 # Check toolchain versions:
447 # - gcc-4.6 is the minimum kernel-wide version so nothing required.
449 @if
test "x${CONFIG_LD_IS_LLD}" != "xy" -a \
450 "x$(call ld-ifversion, -le, 22400, y)" = "xy" ; then \
451 echo
-n
'*** binutils 2.24 miscompiles weak symbols ' ; \
452 echo
'in some circumstances.' ; \
453 echo
'*** binutils 2.23 do not define the TOC symbol ' ; \
454 echo
-n
'*** Please use a different binutils version.' ; \