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1# This file is included by the global makefile so that you can add your own
2# architecture-specific flags and dependencies.
3#
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
6# for more details.
7#
8# Copyright (C) 1994 by Linus Torvalds
9# Changes for PPC by Gary Thomas
10# Rewritten by Cort Dougan and Paul Mackerras
11#
12
13ifdef cross_compiling
14 ifeq ($(CROSS_COMPILE),)
15 # Auto detect cross compiler prefix.
16 # Look for: (powerpc(64(le)?)?)(-unknown)?-linux(-gnu)?-
17 CC_ARCHES := powerpc powerpc64 powerpc64le
18 CC_SUFFIXES := linux linux-gnu unknown-linux-gnu
19 CROSS_COMPILE := $(call cc-cross-prefix, $(foreach a,$(CC_ARCHES), \
20 $(foreach s,$(CC_SUFFIXES),$(a)-$(s)-)))
21 endif
22endif
23
24HAS_BIARCH := $(call cc-option-yn, -m32)
25
26# Set default 32 bits cross compilers for vdso and boot wrapper
27CROSS32_COMPILE ?=
28
29# If we're on a ppc/ppc64/ppc64le machine use that defconfig, otherwise just use
30# ppc64le_defconfig because we have nothing better to go on.
31uname := $(shell uname -m)
32KBUILD_DEFCONFIG := $(if $(filter ppc%,$(uname)),$(uname),ppc64le)_defconfig
33
34new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
35
36ifeq ($(new_nm),y)
37NM := $(NM) --synthetic
38endif
39
40# BITS is used as extension for files which are available in a 32 bit
41# and a 64 bit version to simplify shared Makefiles.
42# e.g.: obj-y += foo_$(BITS).o
43export BITS
44
45ifdef CONFIG_PPC64
46 BITS := 64
47else
48 BITS := 32
49endif
50
51machine-y = ppc
52machine-$(CONFIG_PPC64) += 64
53machine-$(CONFIG_CPU_LITTLE_ENDIAN) += le
54UTS_MACHINE := $(subst $(space),,$(machine-y))
55
56ifeq ($(CONFIG_PPC64)$(CONFIG_LD_IS_BFD),yy)
57# Have the linker provide sfpr if possible.
58# There is a corresponding test in arch/powerpc/lib/Makefile
59KBUILD_LDFLAGS_MODULE += --save-restore-funcs
60else
61KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
62endif
63
64ifdef CONFIG_CPU_LITTLE_ENDIAN
65KBUILD_CFLAGS += -mlittle-endian
66KBUILD_LDFLAGS += -EL
67LDEMULATION := lppc
68GNUTARGET := powerpcle
69MULTIPLEWORD := -mno-multiple
70KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect)
71else
72KBUILD_CFLAGS += $(call cc-option,-mbig-endian)
73KBUILD_LDFLAGS += -EB
74LDEMULATION := ppc
75GNUTARGET := powerpc
76MULTIPLEWORD := -mmultiple
77endif
78
79ifdef CONFIG_PPC64
80ifndef CONFIG_CC_IS_CLANG
81cflags-$(CONFIG_PPC64_ELF_ABI_V1) += $(call cc-option,-mabi=elfv1)
82cflags-$(CONFIG_PPC64_ELF_ABI_V1) += $(call cc-option,-mcall-aixdesc)
83aflags-$(CONFIG_PPC64_ELF_ABI_V1) += $(call cc-option,-mabi=elfv1)
84aflags-$(CONFIG_PPC64_ELF_ABI_V2) += -mabi=elfv2
85endif
86endif
87
88ifndef CONFIG_CC_IS_CLANG
89 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align
90endif
91
92cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
93cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
94aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
95aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
96
97ifeq ($(HAS_BIARCH),y)
98KBUILD_CFLAGS += -m$(BITS)
99KBUILD_AFLAGS += -m$(BITS)
100KBUILD_LDFLAGS += -m elf$(BITS)$(LDEMULATION)
101endif
102
103cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard=tls
104ifdef CONFIG_PPC64
105cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r13
106else
107cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r2
108endif
109
110LDFLAGS_vmlinux-y := -Bstatic
111LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
112LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) += -z notext
113LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y)
114
115ifdef CONFIG_PPC64
116ifndef CONFIG_PPC_KERNEL_PCREL
117ifeq ($(call cc-option-yn,-mcmodel=medium),y)
118 # -mcmodel=medium breaks modules because it uses 32bit offsets from
119 # the TOC pointer to create pointers where possible. Pointers into the
120 # percpu data area are created by this method.
121 #
122 # The kernel module loader relocates the percpu data section from the
123 # original location (starting with 0xd...) to somewhere in the base
124 # kernel percpu data space (starting with 0xc...). We need a full
125 # 64bit relocation for this to work, hence -mcmodel=large.
126 KBUILD_CFLAGS_MODULE += -mcmodel=large
127else
128 export NO_MINIMAL_TOC := -mno-minimal-toc
129endif
130endif
131endif
132
133CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no)
134ifdef CONFIG_PPC64_ELF_ABI_V2
135CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc))
136else
137ifndef CONFIG_CC_IS_CLANG
138CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
139CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc)
140endif
141endif
142CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc))
143CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions)
144CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mlong-double-128)
145
146# Clang unconditionally reserves r2 on ppc32 and does not support the flag
147# https://bugs.llvm.org/show_bug.cgi?id=39555
148CFLAGS-$(CONFIG_PPC32) := $(call cc-option, -ffixed-r2)
149
150# Clang doesn't support -mmultiple / -mno-multiple
151# https://bugs.llvm.org/show_bug.cgi?id=39556
152CFLAGS-$(CONFIG_PPC32) += $(call cc-option, $(MULTIPLEWORD))
153
154CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata)
155
156ifdef CONFIG_FUNCTION_TRACER
157ifdef CONFIG_ARCH_USING_PATCHABLE_FUNCTION_ENTRY
158KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY
159CC_FLAGS_FTRACE := -fpatchable-function-entry=2
160else
161CC_FLAGS_FTRACE := -pg
162ifdef CONFIG_MPROFILE_KERNEL
163CC_FLAGS_FTRACE += -mprofile-kernel
164endif
165endif
166endif
167
168CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += -mcpu=$(CONFIG_TARGET_CPU)
169AFLAGS-$(CONFIG_TARGET_CPU_BOOL) += -mcpu=$(CONFIG_TARGET_CPU)
170
171CFLAGS-y += $(CONFIG_TUNE_CPU)
172
173asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
174
175KBUILD_CPPFLAGS += -I $(srctree)/arch/powerpc $(asinstr)
176KBUILD_AFLAGS += $(AFLAGS-y)
177KBUILD_CFLAGS += $(call cc-option,-msoft-float)
178KBUILD_CFLAGS += $(CFLAGS-y)
179CPP = $(CC) -E $(KBUILD_CFLAGS)
180
181CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__
182ifdef CONFIG_CPU_BIG_ENDIAN
183CHECKFLAGS += -D__BIG_ENDIAN__
184else
185CHECKFLAGS += -D__LITTLE_ENDIAN__
186endif
187
188ifdef CONFIG_476FPE_ERR46
189 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \
190 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds
191endif
192
193# No prefix or pcrel
194ifdef CONFIG_PPC_KERNEL_PREFIXED
195KBUILD_CFLAGS += $(call cc-option,-mprefixed)
196else
197KBUILD_CFLAGS += $(call cc-option,-mno-prefixed)
198endif
199ifdef CONFIG_PPC_KERNEL_PCREL
200KBUILD_CFLAGS += $(call cc-option,-mpcrel)
201else
202KBUILD_CFLAGS += $(call cc-option,-mno-pcrel)
203endif
204
205# No AltiVec or VSX or MMA instructions when building kernel
206KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
207KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
208KBUILD_CFLAGS += $(call cc-option,-mno-mma)
209
210# No SPE instruction when building kernel
211# (We use all available options to help semi-broken compilers)
212KBUILD_CFLAGS += $(call cc-option,-mno-spe)
213KBUILD_CFLAGS += $(call cc-option,-mspe=no)
214
215# Don't emit .eh_frame since we have no use for it
216KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
217
218# Never use string load/store instructions as they are
219# often slow when they are implemented at all
220KBUILD_CFLAGS += $(call cc-option,-mno-string)
221
222cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec)
223
224# When using '-many -mpower4' gas will first try and find a matching power4
225# mnemonic and failing that it will allow any valid mnemonic that GAS knows
226# about. GCC will pass -many to GAS when assembling, clang does not.
227# LLVM IAS doesn't understand either flag: https://github.com/ClangBuiltLinux/linux/issues/675
228# but LLVM IAS only supports ISA >= 2.06 for Book3S 64 anyway...
229cpu-as-$(CONFIG_PPC_BOOK3S_64) += $(call as-option,-Wa$(comma)-mpower4) $(call as-option,-Wa$(comma)-many)
230
231KBUILD_AFLAGS += $(cpu-as-y)
232KBUILD_CFLAGS += $(cpu-as-y)
233
234KBUILD_AFLAGS += $(aflags-y)
235KBUILD_CFLAGS += $(cflags-y)
236
237# Default to zImage, override when needed
238all: zImage
239
240# With make 3.82 we cannot mix normal and wildcard targets
241BOOT_TARGETS1 := zImage zImage.initrd uImage
242BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
243
244PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
245
246boot := arch/powerpc/boot
247
248$(BOOT_TARGETS1): vmlinux
249 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
250$(BOOT_TARGETS2): vmlinux
251 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
252
253
254PHONY += bootwrapper_install
255bootwrapper_install:
256 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
257
258include $(srctree)/scripts/Makefile.defconf
259
260generated_configs += ppc64le_defconfig
261ppc64le_defconfig:
262 $(call merge_into_defconfig,ppc64_defconfig,le)
263
264generated_configs += ppc64le_guest_defconfig
265ppc64le_guest_defconfig:
266 $(call merge_into_defconfig,ppc64_defconfig,le guest kvm_guest)
267
268generated_configs += ppc64_guest_defconfig
269ppc64_guest_defconfig:
270 $(call merge_into_defconfig,ppc64_defconfig,be guest kvm_guest)
271
272generated_configs += pseries_le_defconfig
273pseries_le_defconfig: ppc64le_guest_defconfig
274
275generated_configs += pseries_defconfig
276pseries_defconfig: ppc64le_guest_defconfig
277
278generated_configs += powernv_be_defconfig
279powernv_be_defconfig:
280 $(call merge_into_defconfig,powernv_defconfig,be)
281
282generated_configs += mpc85xx_defconfig
283mpc85xx_defconfig:
284 $(call merge_into_defconfig,mpc85xx_base.config,\
285 85xx-32bit 85xx-hw fsl-emb-nonhw)
286
287generated_configs += mpc85xx_smp_defconfig
288mpc85xx_smp_defconfig:
289 $(call merge_into_defconfig,mpc85xx_base.config,\
290 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)
291
292generated_configs += corenet32_smp_defconfig
293corenet32_smp_defconfig:
294 $(call merge_into_defconfig,corenet_base.config,\
295 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa)
296
297generated_configs += corenet64_smp_defconfig
298corenet64_smp_defconfig:
299 $(call merge_into_defconfig,corenet_base.config,\
300 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa)
301
302generated_configs += mpc86xx_defconfig
303mpc86xx_defconfig:
304 $(call merge_into_defconfig,mpc86xx_base.config,\
305 86xx-hw fsl-emb-nonhw)
306
307generated_configs += mpc86xx_smp_defconfig
308mpc86xx_smp_defconfig:
309 $(call merge_into_defconfig,mpc86xx_base.config,\
310 86xx-smp 86xx-hw fsl-emb-nonhw)
311
312generated_configs += ppc32_allmodconfig
313ppc32_allmodconfig:
314 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \
315 -f $(srctree)/Makefile allmodconfig
316
317generated_configs += ppc_defconfig
318ppc_defconfig:
319 $(call merge_into_defconfig,book3s_32.config,)
320
321generated_configs += ppc64le_allmodconfig
322ppc64le_allmodconfig:
323 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \
324 -f $(srctree)/Makefile allmodconfig
325
326generated_configs += ppc64le_allnoconfig
327ppc64le_allnoconfig:
328 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/ppc64le.config \
329 -f $(srctree)/Makefile allnoconfig
330
331generated_configs += ppc64_book3e_allmodconfig
332ppc64_book3e_allmodconfig:
333 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \
334 -f $(srctree)/Makefile allmodconfig
335
336generated_configs += ppc32_randconfig
337ppc32_randconfig:
338 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/32-bit.config \
339 -f $(srctree)/Makefile randconfig
340
341generated_configs += ppc64_randconfig
342ppc64_randconfig:
343 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/64-bit.config \
344 -f $(srctree)/Makefile randconfig
345
346PHONY += $(generated_configs)
347
348define archhelp
349 echo '* zImage - Build default images selected by kernel config'
350 echo ' zImage.* - Compressed kernel image (arch/powerpc/boot/zImage.*)'
351 echo ' uImage - U-Boot native image format'
352 echo ' cuImage.<dt> - Backwards compatible U-Boot image for older'
353 echo ' versions which do not support device trees'
354 echo ' dtbImage.<dt> - zImage with an embedded device tree blob'
355 echo ' simpleImage.<dt> - Firmware independent image.'
356 echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)'
357 echo ' install - Install kernel using'
358 echo ' (your) ~/bin/$(INSTALLKERNEL) or'
359 echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
360 echo ' install to $$(INSTALL_PATH) and run lilo'
361 echo ' *_defconfig - Select default config from arch/powerpc/configs'
362 echo ''
363 echo ' Targets with <dt> embed a device tree blob inside the image'
364 echo ' These targets support board with firmware that does not'
365 echo ' support passing a device tree directly. Replace <dt> with the'
366 echo ' name of a dts file from the arch/powerpc/boot/dts directory'
367 echo ' (minus the .dts extension).'
368 echo
369 $(foreach cfg,$(generated_configs),
370 printf " %-27s - Build for %s\\n" $(cfg) $(subst _defconfig,,$(cfg));)
371endef
372
373PHONY += install
374install:
375 $(call cmd,install)
376
377ifeq ($(KBUILD_EXTMOD),)
378# We need to generate vdso-offsets.h before compiling certain files in kernel/.
379# In order to do that, we should use the archprepare target, but we can't since
380# asm-offsets.h is included in some files used to generate vdso-offsets.h, and
381# asm-offsets.h is built in prepare0, for which archprepare is a dependency.
382# Therefore we need to generate the header after prepare0 has been made, hence
383# this hack.
384prepare: vdso_prepare
385vdso_prepare: prepare0
386 $(if $(CONFIG_VDSO32),$(Q)$(MAKE) \
387 $(build)=arch/powerpc/kernel/vdso include/generated/vdso32-offsets.h)
388 $(if $(CONFIG_PPC64),$(Q)$(MAKE) \
389 $(build)=arch/powerpc/kernel/vdso include/generated/vdso64-offsets.h)
390endif
391
392archprepare: checkbin
393
394archheaders:
395 $(Q)$(MAKE) $(build)=arch/powerpc/kernel/syscalls all
396
397ifdef CONFIG_STACKPROTECTOR
398prepare: stack_protector_prepare
399
400PHONY += stack_protector_prepare
401stack_protector_prepare: prepare0
402ifdef CONFIG_PPC64
403 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' include/generated/asm-offsets.h))
404else
405 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' include/generated/asm-offsets.h))
406endif
407endif
408
409PHONY += checkbin
410checkbin:
411 @if test "x${CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT}" = "xy" -a \
412 "x${CONFIG_LD_IS_BFD}" = "xy" -a \
413 "${CONFIG_LD_VERSION}" = "23700" ; then \
414 echo -n '*** binutils 2.37 drops unused section symbols, which recordmcount ' ; \
415 echo 'is unable to handle.' ; \
416 echo '*** Please use a different binutils version.' ; \
417 false ; \
418 fi
1# This file is included by the global makefile so that you can add your own
2# architecture-specific flags and dependencies. Remember to do have actions
3# for "archclean" and "archdep" for cleaning up and making dependencies for
4# this architecture.
5#
6# This file is subject to the terms and conditions of the GNU General Public
7# License. See the file "COPYING" in the main directory of this archive
8# for more details.
9#
10# Copyright (C) 1994 by Linus Torvalds
11# Changes for PPC by Gary Thomas
12# Rewritten by Cort Dougan and Paul Mackerras
13#
14
15HAS_BIARCH := $(call cc-option-yn, -m32)
16
17# Set default 32 bits cross compilers for vdso and boot wrapper
18CROSS32_COMPILE ?=
19
20ifeq ($(HAS_BIARCH),y)
21ifeq ($(CROSS32_COMPILE),)
22ifdef CONFIG_PPC32
23# These options will be overridden by any -mcpu option that the CPU
24# or platform code sets later on the command line, but they are needed
25# to set a sane 32-bit cpu target for the 64-bit cross compiler which
26# may default to the wrong ISA.
27KBUILD_CFLAGS += -mcpu=powerpc
28KBUILD_AFLAGS += -mcpu=powerpc
29endif
30endif
31endif
32
33ifdef CONFIG_PPC_BOOK3S_32
34KBUILD_CFLAGS += -mcpu=powerpc
35endif
36
37# If we're on a ppc/ppc64/ppc64le machine use that defconfig, otherwise just use
38# ppc64_defconfig because we have nothing better to go on.
39uname := $(shell uname -m)
40KBUILD_DEFCONFIG := $(if $(filter ppc%,$(uname)),$(uname),ppc64)_defconfig
41
42new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
43
44ifeq ($(new_nm),y)
45NM := $(NM) --synthetic
46endif
47
48# BITS is used as extension for files which are available in a 32 bit
49# and a 64 bit version to simplify shared Makefiles.
50# e.g.: obj-y += foo_$(BITS).o
51export BITS
52
53ifdef CONFIG_PPC64
54 BITS := 64
55else
56 BITS := 32
57endif
58
59machine-y = ppc
60machine-$(CONFIG_PPC64) += 64
61machine-$(CONFIG_CPU_LITTLE_ENDIAN) += le
62UTS_MACHINE := $(subst $(space),,$(machine-y))
63
64# XXX This needs to be before we override LD below
65ifdef CONFIG_PPC32
66KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
67else
68KBUILD_LDS_MODULE += $(srctree)/arch/powerpc/kernel/module.lds
69ifeq ($(call ld-ifversion, -ge, 225000000, y),y)
70# Have the linker provide sfpr if possible.
71# There is a corresponding test in arch/powerpc/lib/Makefile
72KBUILD_LDFLAGS_MODULE += --save-restore-funcs
73else
74KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
75endif
76endif
77
78ifdef CONFIG_CPU_LITTLE_ENDIAN
79KBUILD_CFLAGS += -mlittle-endian
80KBUILD_LDFLAGS += -EL
81LDEMULATION := lppc
82GNUTARGET := powerpcle
83MULTIPLEWORD := -mno-multiple
84KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect)
85else
86KBUILD_CFLAGS += $(call cc-option,-mbig-endian)
87KBUILD_LDFLAGS += -EB
88LDEMULATION := ppc
89GNUTARGET := powerpc
90MULTIPLEWORD := -mmultiple
91endif
92
93ifdef CONFIG_PPC64
94cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1)
95cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mcall-aixdesc)
96aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1)
97aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mabi=elfv2
98endif
99
100ifndef CONFIG_CC_IS_CLANG
101 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align
102endif
103
104cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
105cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
106aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
107aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
108
109ifeq ($(HAS_BIARCH),y)
110KBUILD_CFLAGS += -m$(BITS)
111KBUILD_AFLAGS += -m$(BITS) -Wl,-a$(BITS)
112KBUILD_LDFLAGS += -m elf$(BITS)$(LDEMULATION)
113endif
114
115cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard=tls
116ifdef CONFIG_PPC64
117cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r13
118else
119cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r2
120endif
121
122LDFLAGS_vmlinux-y := -Bstatic
123LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
124LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y)
125LDFLAGS_vmlinux += $(call ld-option,--orphan-handling=warn)
126
127ifdef CONFIG_PPC64
128ifeq ($(call cc-option-yn,-mcmodel=medium),y)
129 # -mcmodel=medium breaks modules because it uses 32bit offsets from
130 # the TOC pointer to create pointers where possible. Pointers into the
131 # percpu data area are created by this method.
132 #
133 # The kernel module loader relocates the percpu data section from the
134 # original location (starting with 0xd...) to somewhere in the base
135 # kernel percpu data space (starting with 0xc...). We need a full
136 # 64bit relocation for this to work, hence -mcmodel=large.
137 KBUILD_CFLAGS_MODULE += -mcmodel=large
138else
139 export NO_MINIMAL_TOC := -mno-minimal-toc
140endif
141endif
142
143CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no)
144ifdef CONFIG_CPU_LITTLE_ENDIAN
145CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc))
146AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2)
147else
148CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
149CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc)
150AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
151endif
152CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc))
153CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions)
154
155# Clang unconditionally reserves r2 on ppc32 and does not support the flag
156# https://bugs.llvm.org/show_bug.cgi?id=39555
157CFLAGS-$(CONFIG_PPC32) := $(call cc-option, -ffixed-r2)
158
159# Clang doesn't support -mmultiple / -mno-multiple
160# https://bugs.llvm.org/show_bug.cgi?id=39556
161CFLAGS-$(CONFIG_PPC32) += $(call cc-option, $(MULTIPLEWORD))
162
163CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata)
164
165ifdef CONFIG_PPC_BOOK3S_64
166ifdef CONFIG_CPU_LITTLE_ENDIAN
167CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8
168CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power9,-mtune=power8)
169else
170CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5))
171CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mcpu=power5,-mcpu=power4)
172endif
173else
174CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
175endif
176
177ifdef CONFIG_FUNCTION_TRACER
178CC_FLAGS_FTRACE := -pg
179ifdef CONFIG_MPROFILE_KERNEL
180CC_FLAGS_FTRACE += -mprofile-kernel
181endif
182# Work around gcc code-gen bugs with -pg / -fno-omit-frame-pointer in gcc <= 4.8
183# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44199
184# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52828
185ifndef CONFIG_CC_IS_CLANG
186CC_FLAGS_FTRACE += $(call cc-ifversion, -lt, 0409, -mno-sched-epilog)
187endif
188endif
189
190CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU))
191
192# Altivec option not allowed with e500mc64 in GCC.
193ifdef CONFIG_ALTIVEC
194E5500_CPU := -mcpu=powerpc64
195else
196E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
197endif
198CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU)
199CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
200
201ifdef CONFIG_PPC32
202ifdef CONFIG_PPC_E500MC
203CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc)
204else
205CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc)
206endif
207endif
208
209asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
210
211KBUILD_CPPFLAGS += -I $(srctree)/arch/$(ARCH) $(asinstr)
212KBUILD_AFLAGS += $(AFLAGS-y)
213KBUILD_CFLAGS += $(call cc-option,-msoft-float)
214KBUILD_CFLAGS += -pipe $(CFLAGS-y)
215CPP = $(CC) -E $(KBUILD_CFLAGS)
216
217CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__
218ifdef CONFIG_CPU_BIG_ENDIAN
219CHECKFLAGS += -D__BIG_ENDIAN__
220else
221CHECKFLAGS += -D__LITTLE_ENDIAN__
222endif
223
224ifdef CONFIG_476FPE_ERR46
225 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \
226 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds
227endif
228
229# No AltiVec or VSX instructions when building kernel
230KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
231KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
232
233# No SPE instruction when building kernel
234# (We use all available options to help semi-broken compilers)
235KBUILD_CFLAGS += $(call cc-option,-mno-spe)
236KBUILD_CFLAGS += $(call cc-option,-mspe=no)
237
238# FIXME: the module load should be taught about the additional relocs
239# generated by this.
240# revert to pre-gcc-4.4 behaviour of .eh_frame
241KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
242
243# Never use string load/store instructions as they are
244# often slow when they are implemented at all
245KBUILD_CFLAGS += $(call cc-option,-mno-string)
246
247cpu-as-$(CONFIG_4xx) += -Wa,-m405
248cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec)
249cpu-as-$(CONFIG_E200) += -Wa,-me200
250cpu-as-$(CONFIG_E500) += -Wa,-me500
251
252# When using '-many -mpower4' gas will first try and find a matching power4
253# mnemonic and failing that it will allow any valid mnemonic that GAS knows
254# about. GCC will pass -many to GAS when assembling, clang does not.
255cpu-as-$(CONFIG_PPC_BOOK3S_64) += -Wa,-mpower4 -Wa,-many
256cpu-as-$(CONFIG_PPC_E500MC) += $(call as-option,-Wa$(comma)-me500mc)
257
258KBUILD_AFLAGS += $(cpu-as-y)
259KBUILD_CFLAGS += $(cpu-as-y)
260
261KBUILD_AFLAGS += $(aflags-y)
262KBUILD_CFLAGS += $(cflags-y)
263
264head-y := arch/powerpc/kernel/head_$(BITS).o
265head-$(CONFIG_PPC_8xx) := arch/powerpc/kernel/head_8xx.o
266head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o
267head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o
268head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o
269
270head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o
271head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o
272head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o
273head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o
274
275# See arch/powerpc/Kbuild for content of core part of the kernel
276core-y += arch/powerpc
277
278drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/
279
280# Default to zImage, override when needed
281all: zImage
282
283# With make 3.82 we cannot mix normal and wildcard targets
284BOOT_TARGETS1 := zImage zImage.initrd uImage
285BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
286
287PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
288
289boot := arch/$(ARCH)/boot
290
291$(BOOT_TARGETS1): vmlinux
292 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
293$(BOOT_TARGETS2): vmlinux
294 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
295
296
297bootwrapper_install:
298 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
299
300# Used to create 'merged defconfigs'
301# To use it $(call) it with the first argument as the base defconfig
302# and the second argument as a space separated list of .config files to merge,
303# without the .config suffix.
304define merge_into_defconfig
305 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
306 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \
307 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config)
308 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
309endef
310
311PHONY += pseries_le_defconfig
312pseries_le_defconfig:
313 $(call merge_into_defconfig,pseries_defconfig,le)
314
315PHONY += ppc64le_defconfig
316ppc64le_defconfig:
317 $(call merge_into_defconfig,ppc64_defconfig,le)
318
319PHONY += ppc64le_guest_defconfig
320ppc64le_guest_defconfig:
321 $(call merge_into_defconfig,ppc64_defconfig,le guest)
322
323PHONY += ppc64_guest_defconfig
324ppc64_guest_defconfig:
325 $(call merge_into_defconfig,ppc64_defconfig,be guest)
326
327PHONY += powernv_be_defconfig
328powernv_be_defconfig:
329 $(call merge_into_defconfig,powernv_defconfig,be)
330
331PHONY += mpc85xx_defconfig
332mpc85xx_defconfig:
333 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\
334 85xx-32bit 85xx-hw fsl-emb-nonhw)
335
336PHONY += mpc85xx_smp_defconfig
337mpc85xx_smp_defconfig:
338 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\
339 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)
340
341PHONY += corenet32_smp_defconfig
342corenet32_smp_defconfig:
343 $(call merge_into_defconfig,corenet_basic_defconfig,\
344 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa)
345
346PHONY += corenet64_smp_defconfig
347corenet64_smp_defconfig:
348 $(call merge_into_defconfig,corenet_basic_defconfig,\
349 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa)
350
351PHONY += mpc86xx_defconfig
352mpc86xx_defconfig:
353 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\
354 86xx-hw fsl-emb-nonhw)
355
356PHONY += mpc86xx_smp_defconfig
357mpc86xx_smp_defconfig:
358 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\
359 86xx-smp 86xx-hw fsl-emb-nonhw)
360
361PHONY += ppc32_allmodconfig
362ppc32_allmodconfig:
363 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \
364 -f $(srctree)/Makefile allmodconfig
365
366PHONY += ppc_defconfig
367ppc_defconfig:
368 $(call merge_into_defconfig,book3s_32.config,)
369
370PHONY += ppc64le_allmodconfig
371ppc64le_allmodconfig:
372 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \
373 -f $(srctree)/Makefile allmodconfig
374
375PHONY += ppc64_book3e_allmodconfig
376ppc64_book3e_allmodconfig:
377 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \
378 -f $(srctree)/Makefile allmodconfig
379
380define archhelp
381 @echo '* zImage - Build default images selected by kernel config'
382 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
383 @echo ' uImage - U-Boot native image format'
384 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older'
385 @echo ' versions which do not support device trees'
386 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob'
387 @echo ' simpleImage.<dt> - Firmware independent image.'
388 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)'
389 @echo ' install - Install kernel using'
390 @echo ' (your) ~/bin/$(INSTALLKERNEL) or'
391 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
392 @echo ' install to $$(INSTALL_PATH) and run lilo'
393 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs'
394 @echo ''
395 @echo ' Targets with <dt> embed a device tree blob inside the image'
396 @echo ' These targets support board with firmware that does not'
397 @echo ' support passing a device tree directly. Replace <dt> with the'
398 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
399 @echo ' (minus the .dts extension).'
400endef
401
402install:
403 $(Q)$(MAKE) $(build)=$(boot) install
404
405vdso_install:
406ifdef CONFIG_PPC64
407 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
408endif
409ifdef CONFIG_VDSO32
410 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
411endif
412
413archclean:
414 $(Q)$(MAKE) $(clean)=$(boot)
415
416archprepare: checkbin
417
418archheaders:
419 $(Q)$(MAKE) $(build)=arch/powerpc/kernel/syscalls all
420
421ifdef CONFIG_STACKPROTECTOR
422prepare: stack_protector_prepare
423
424stack_protector_prepare: prepare0
425ifdef CONFIG_PPC64
426 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' include/generated/asm-offsets.h))
427else
428 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' include/generated/asm-offsets.h))
429endif
430endif
431
432ifdef CONFIG_SMP
433prepare: task_cpu_prepare
434
435task_cpu_prepare: prepare0
436 $(eval KBUILD_CFLAGS += -D_TASK_CPU=$(shell awk '{if ($$2 == "TASK_CPU") print $$3;}' include/generated/asm-offsets.h))
437endif
438
439# Check toolchain versions:
440# - gcc-4.6 is the minimum kernel-wide version so nothing required.
441checkbin:
442 @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \
443 && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \
444 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \
445 echo 'in some circumstances.' ; \
446 echo -n '*** Please use a different binutils version.' ; \
447 false ; \
448 fi