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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. 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
20CROSS32CC := $(CROSS32_COMPILE)gcc
21CROSS32AR := $(CROSS32_COMPILE)ar
22
23ifeq ($(HAS_BIARCH),y)
24ifeq ($(CROSS32_COMPILE),)
25CROSS32CC := $(CC) -m32
26KBUILD_ARFLAGS += --target=elf32-powerpc
27endif
28endif
29
30export CROSS32CC CROSS32AR
31
32ifeq ($(CROSS_COMPILE),)
33KBUILD_DEFCONFIG := $(shell uname -m)_defconfig
34else
35KBUILD_DEFCONFIG := ppc64_defconfig
36endif
37
38ifeq ($(CONFIG_PPC64),y)
39new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
40
41ifeq ($(new_nm),y)
42NM := $(NM) --synthetic
43endif
44endif
45
46# BITS is used as extension for files which are available in a 32 bit
47# and a 64 bit version to simplify shared Makefiles.
48# e.g.: obj-y += foo_$(BITS).o
49export BITS
50
51ifdef CONFIG_PPC64
52 BITS := 64
53else
54 BITS := 32
55endif
56
57machine-y = ppc
58machine-$(CONFIG_PPC64) += 64
59machine-$(CONFIG_CPU_LITTLE_ENDIAN) += le
60UTS_MACHINE := $(subst $(space),,$(machine-y))
61
62# XXX This needs to be before we override LD below
63ifdef CONFIG_PPC32
64KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
65else
66KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/powerpc/kernel/module.lds
67ifeq ($(call ld-ifversion, -ge, 225000000, y),y)
68# Have the linker provide sfpr if possible.
69# There is a corresponding test in arch/powerpc/lib/Makefile
70KBUILD_LDFLAGS_MODULE += --save-restore-funcs
71else
72KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
73endif
74endif
75
76ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
77override LD += -EL
78LDEMULATION := lppc
79GNUTARGET := powerpcle
80MULTIPLEWORD := -mno-multiple
81KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect)
82else
83override LD += -EB
84LDEMULATION := ppc
85GNUTARGET := powerpc
86MULTIPLEWORD := -mmultiple
87endif
88
89ifdef CONFIG_PPC64
90cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1)
91cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mcall-aixdesc)
92aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1)
93aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mabi=elfv2
94endif
95
96cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
97cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
98ifneq ($(cc-name),clang)
99 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align
100endif
101
102aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
103aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
104
105ifeq ($(HAS_BIARCH),y)
106override AS += -a$(BITS)
107override LD += -m elf$(BITS)$(LDEMULATION)
108override CC += -m$(BITS)
109KBUILD_ARFLAGS += --target=elf$(BITS)-$(GNUTARGET)
110endif
111
112LDFLAGS_vmlinux-y := -Bstatic
113LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
114LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y)
115LDFLAGS_vmlinux += $(call ld-option,--orphan-handling=warn)
116
117ifeq ($(CONFIG_PPC64),y)
118ifeq ($(call cc-option-yn,-mcmodel=medium),y)
119 # -mcmodel=medium breaks modules because it uses 32bit offsets from
120 # the TOC pointer to create pointers where possible. Pointers into the
121 # percpu data area are created by this method.
122 #
123 # The kernel module loader relocates the percpu data section from the
124 # original location (starting with 0xd...) to somewhere in the base
125 # kernel percpu data space (starting with 0xc...). We need a full
126 # 64bit relocation for this to work, hence -mcmodel=large.
127 KBUILD_CFLAGS_MODULE += -mcmodel=large
128else
129 export NO_MINIMAL_TOC := -mno-minimal-toc
130endif
131endif
132
133CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no)
134ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
135CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc))
136AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2)
137else
138CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
139CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc)
140AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
141endif
142CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc))
143CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions)
144
145CFLAGS-$(CONFIG_PPC32) := -ffixed-r2 $(MULTIPLEWORD)
146CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata)
147
148ifeq ($(CONFIG_PPC_BOOK3S_64),y)
149ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
150CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8
151CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power9,-mtune=power8)
152else
153CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5))
154CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mcpu=power5,-mcpu=power4)
155endif
156else
157CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
158endif
159
160ifdef CONFIG_MPROFILE_KERNEL
161 ifeq ($(shell $(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -I$(srctree)/include -D__KERNEL__),OK)
162 CC_FLAGS_FTRACE := -pg -mprofile-kernel
163 KBUILD_CPPFLAGS += -DCC_USING_MPROFILE_KERNEL
164 else
165 # If the user asked for mprofile-kernel but the toolchain doesn't
166 # support it, emit a warning and deliberately break the build later
167 # with mprofile-kernel-not-supported. We would prefer to make this an
168 # error right here, but then the user would never be able to run
169 # oldconfig to change their configuration.
170 $(warning Compiler does not support mprofile-kernel, set CONFIG_DISABLE_MPROFILE_KERNEL)
171 CC_FLAGS_FTRACE := -mprofile-kernel-not-supported
172 endif
173endif
174
175CFLAGS-$(CONFIG_CELL_CPU) += $(call cc-option,-mcpu=cell)
176CFLAGS-$(CONFIG_POWER5_CPU) += $(call cc-option,-mcpu=power5)
177CFLAGS-$(CONFIG_POWER6_CPU) += $(call cc-option,-mcpu=power6)
178CFLAGS-$(CONFIG_POWER7_CPU) += $(call cc-option,-mcpu=power7)
179CFLAGS-$(CONFIG_POWER8_CPU) += $(call cc-option,-mcpu=power8)
180CFLAGS-$(CONFIG_POWER9_CPU) += $(call cc-option,-mcpu=power9)
181
182# Altivec option not allowed with e500mc64 in GCC.
183ifeq ($(CONFIG_ALTIVEC),y)
184E5500_CPU := -mcpu=powerpc64
185else
186E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
187endif
188CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU)
189CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
190
191ifeq ($(CONFIG_PPC32),y)
192ifeq ($(CONFIG_PPC_E500MC),y)
193CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc)
194else
195CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc)
196endif
197endif
198
199asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
200
201KBUILD_CPPFLAGS += -Iarch/$(ARCH) $(asinstr)
202KBUILD_AFLAGS += -Iarch/$(ARCH) $(AFLAGS-y)
203KBUILD_CFLAGS += $(call cc-option,-msoft-float)
204KBUILD_CFLAGS += -pipe -Iarch/$(ARCH) $(CFLAGS-y)
205CPP = $(CC) -E $(KBUILD_CFLAGS)
206
207CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__
208ifdef CONFIG_CPU_BIG_ENDIAN
209CHECKFLAGS += -D__BIG_ENDIAN__
210else
211CHECKFLAGS += -D__LITTLE_ENDIAN__
212endif
213
214ifeq ($(CONFIG_476FPE_ERR46),y)
215 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \
216 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds
217endif
218
219# No AltiVec or VSX instructions when building kernel
220KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
221KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
222
223# No SPE instruction when building kernel
224# (We use all available options to help semi-broken compilers)
225KBUILD_CFLAGS += $(call cc-option,-mno-spe)
226KBUILD_CFLAGS += $(call cc-option,-mspe=no)
227
228# Enable unit-at-a-time mode when possible. It shrinks the
229# kernel considerably.
230KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
231
232# FIXME: the module load should be taught about the additional relocs
233# generated by this.
234# revert to pre-gcc-4.4 behaviour of .eh_frame
235KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
236
237# Never use string load/store instructions as they are
238# often slow when they are implemented at all
239KBUILD_CFLAGS += $(call cc-option,-mno-string)
240
241ifeq ($(CONFIG_6xx),y)
242KBUILD_CFLAGS += -mcpu=powerpc
243endif
244
245# Work around a gcc code-gen bug with -fno-omit-frame-pointer.
246ifeq ($(CONFIG_FUNCTION_TRACER),y)
247KBUILD_CFLAGS += -mno-sched-epilog
248endif
249
250cpu-as-$(CONFIG_4xx) += -Wa,-m405
251cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec)
252cpu-as-$(CONFIG_E200) += -Wa,-me200
253cpu-as-$(CONFIG_PPC_BOOK3S_64) += -Wa,-mpower4
254
255KBUILD_AFLAGS += $(cpu-as-y)
256KBUILD_CFLAGS += $(cpu-as-y)
257
258KBUILD_AFLAGS += $(aflags-y)
259KBUILD_CFLAGS += $(cflags-y)
260
261head-y := arch/powerpc/kernel/head_$(BITS).o
262head-$(CONFIG_PPC_8xx) := arch/powerpc/kernel/head_8xx.o
263head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o
264head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o
265head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o
266
267head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o
268head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o
269head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o
270head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o
271
272core-y += arch/powerpc/kernel \
273 arch/powerpc/mm/ \
274 arch/powerpc/lib/ \
275 arch/powerpc/sysdev/ \
276 arch/powerpc/platforms/ \
277 arch/powerpc/math-emu/ \
278 arch/powerpc/crypto/ \
279 arch/powerpc/net/
280core-$(CONFIG_XMON) += arch/powerpc/xmon/
281core-$(CONFIG_KVM) += arch/powerpc/kvm/
282core-$(CONFIG_PERF_EVENTS) += arch/powerpc/perf/
283core-$(CONFIG_KEXEC_FILE) += arch/powerpc/purgatory/
284
285drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/
286
287# Default to zImage, override when needed
288all: zImage
289
290# With make 3.82 we cannot mix normal and wildcard targets
291BOOT_TARGETS1 := zImage zImage.initrd uImage
292BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
293
294PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
295
296boot := arch/$(ARCH)/boot
297
298$(BOOT_TARGETS1): vmlinux
299 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
300$(BOOT_TARGETS2): vmlinux
301 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
302
303
304bootwrapper_install:
305 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
306
307%.dtb: scripts
308 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
309
310# Used to create 'merged defconfigs'
311# To use it $(call) it with the first argument as the base defconfig
312# and the second argument as a space separated list of .config files to merge,
313# without the .config suffix.
314define merge_into_defconfig
315 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
316 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \
317 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config)
318 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
319endef
320
321PHONY += pseries_le_defconfig
322pseries_le_defconfig:
323 $(call merge_into_defconfig,pseries_defconfig,le)
324
325PHONY += ppc64le_defconfig
326ppc64le_defconfig:
327 $(call merge_into_defconfig,ppc64_defconfig,le)
328
329PHONY += powernv_be_defconfig
330powernv_be_defconfig:
331 $(call merge_into_defconfig,powernv_defconfig,be)
332
333PHONY += mpc85xx_defconfig
334mpc85xx_defconfig:
335 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\
336 85xx-32bit 85xx-hw fsl-emb-nonhw)
337
338PHONY += mpc85xx_smp_defconfig
339mpc85xx_smp_defconfig:
340 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\
341 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)
342
343PHONY += corenet32_smp_defconfig
344corenet32_smp_defconfig:
345 $(call merge_into_defconfig,corenet_basic_defconfig,\
346 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa)
347
348PHONY += corenet64_smp_defconfig
349corenet64_smp_defconfig:
350 $(call merge_into_defconfig,corenet_basic_defconfig,\
351 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa)
352
353PHONY += mpc86xx_defconfig
354mpc86xx_defconfig:
355 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\
356 86xx-hw fsl-emb-nonhw)
357
358PHONY += mpc86xx_smp_defconfig
359mpc86xx_smp_defconfig:
360 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\
361 86xx-smp 86xx-hw fsl-emb-nonhw)
362
363define archhelp
364 @echo '* zImage - Build default images selected by kernel config'
365 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
366 @echo ' uImage - U-Boot native image format'
367 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older'
368 @echo ' versions which do not support device trees'
369 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob'
370 @echo ' simpleImage.<dt> - Firmware independent image.'
371 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)'
372 @echo ' install - Install kernel using'
373 @echo ' (your) ~/bin/$(INSTALLKERNEL) or'
374 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
375 @echo ' install to $$(INSTALL_PATH) and run lilo'
376 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs'
377 @echo ''
378 @echo ' Targets with <dt> embed a device tree blob inside the image'
379 @echo ' These targets support board with firmware that does not'
380 @echo ' support passing a device tree directly. Replace <dt> with the'
381 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
382 @echo ' (minus the .dts extension).'
383endef
384
385install:
386 $(Q)$(MAKE) $(build)=$(boot) install
387
388vdso_install:
389ifeq ($(CONFIG_PPC64),y)
390 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
391endif
392 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
393
394archclean:
395 $(Q)$(MAKE) $(clean)=$(boot)
396
397archprepare: checkbin
398
399# Use the file '.tmp_gas_check' for binutils tests, as gas won't output
400# to stdout and these checks are run even on install targets.
401TOUT := .tmp_gas_check
402
403# Check gcc and binutils versions:
404# - gcc-3.4 and binutils-2.14 are a fatal combination
405# - Require gcc 4.0 or above on 64-bit
406# - gcc-4.2.0 has issues compiling modules on 64-bit
407checkbin:
408 @if test "$(cc-name)" != "clang" \
409 && test "$(cc-version)" = "0304" ; then \
410 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
411 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
412 echo 'correctly with gcc-3.4 and your version of binutils.'; \
413 echo '*** Please upgrade your binutils or downgrade your gcc'; \
414 false; \
415 fi ; \
416 fi
417 @if test "$(cc-name)" != "clang" \
418 && test "$(cc-version)" -lt "0400" \
419 && test "x${CONFIG_PPC64}" = "xy" ; then \
420 echo -n "Sorry, GCC v4.0 or above is required to build " ; \
421 echo "the 64-bit powerpc kernel." ; \
422 false ; \
423 fi
424 @if test "$(cc-name)" != "clang" \
425 && test "$(cc-fullversion)" = "040200" \
426 && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
427 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
428 echo 'kernel with modules enabled.' ; \
429 echo -n '*** Please use a different GCC version or ' ; \
430 echo 'disable kernel modules' ; \
431 false ; \
432 fi
433 @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \
434 && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \
435 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \
436 echo 'in some circumstances.' ; \
437 echo -n '*** Please use a different binutils version.' ; \
438 false ; \
439 fi
440
441
442CLEAN_FILES += $(TOUT)
443
1# This file is included by the global makefile so that you can add your own
2# architecture-specific flags and dependencies.
3#
4# This file is subject to the terms and conditions of the GNU General Public
5# License. See the file "COPYING" in the main directory of this archive
6# for more details.
7#
8# Copyright (C) 1994 by Linus Torvalds
9# Changes for PPC by Gary Thomas
10# Rewritten by Cort Dougan and Paul Mackerras
11#
12
13ifdef cross_compiling
14 ifeq ($(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_CPPFLAGS += -mlittle-endian
66KBUILD_LDFLAGS += -EL
67LDEMULATION := lppc
68GNUTARGET := powerpcle
69MULTIPLEWORD := -mno-multiple
70KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect)
71else
72KBUILD_CPPFLAGS += $(call cc-option,-mbig-endian)
73KBUILD_LDFLAGS += -EB
74LDEMULATION := ppc
75GNUTARGET := powerpc
76MULTIPLEWORD := -mmultiple
77endif
78
79ifdef CONFIG_PPC64
80ifndef CONFIG_CC_IS_CLANG
81cflags-$(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 ($(HAS_BIARCH),y)
98KBUILD_CPPFLAGS += -m$(BITS)
99KBUILD_AFLAGS += -m$(BITS)
100KBUILD_LDFLAGS += -m elf$(BITS)$(LDEMULATION)
101endif
102
103LDFLAGS_vmlinux-y := -Bstatic
104LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
105LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) += -z notext
106LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y)
107
108ifdef CONFIG_PPC64
109ifndef CONFIG_PPC_KERNEL_PCREL
110 # -mcmodel=medium breaks modules because it uses 32bit offsets from
111 # the TOC pointer to create pointers where possible. Pointers into the
112 # percpu data area are created by this method.
113 #
114 # The kernel module loader relocates the percpu data section from the
115 # original location (starting with 0xd...) to somewhere in the base
116 # kernel percpu data space (starting with 0xc...). We need a full
117 # 64bit relocation for this to work, hence -mcmodel=large.
118 KBUILD_CFLAGS_MODULE += -mcmodel=large
119endif
120endif
121
122CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no)
123ifdef CONFIG_PPC64_ELF_ABI_V2
124CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc))
125else
126ifndef CONFIG_CC_IS_CLANG
127CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
128CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc)
129endif
130endif
131CFLAGS-$(CONFIG_PPC64) += -mcmodel=medium
132CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions)
133CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mlong-double-128)
134
135# Clang unconditionally reserves r2 on ppc32 and does not support the flag
136# https://llvm.org/pr39555
137CFLAGS-$(CONFIG_PPC32) := $(call cc-option, -ffixed-r2)
138
139# Clang doesn't support -mmultiple / -mno-multiple
140# https://llvm.org/pr39556
141CFLAGS-$(CONFIG_PPC32) += $(call cc-option, $(MULTIPLEWORD))
142
143CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata)
144
145CC_FLAGS_FPU := $(call cc-option,-mhard-float)
146CC_FLAGS_NO_FPU := $(call cc-option,-msoft-float)
147
148ifdef CONFIG_FUNCTION_TRACER
149ifdef CONFIG_ARCH_USING_PATCHABLE_FUNCTION_ENTRY
150KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY
151ifdef CONFIG_PPC_FTRACE_OUT_OF_LINE
152CC_FLAGS_FTRACE := -fpatchable-function-entry=1
153else
154ifdef CONFIG_DYNAMIC_FTRACE_WITH_CALL_OPS # PPC32 only
155CC_FLAGS_FTRACE := -fpatchable-function-entry=3,1
156else
157CC_FLAGS_FTRACE := -fpatchable-function-entry=2
158endif
159endif
160else
161CC_FLAGS_FTRACE := -pg
162ifdef CONFIG_MPROFILE_KERNEL
163CC_FLAGS_FTRACE += -mprofile-kernel
164endif
165endif
166endif
167
168CFLAGS-$(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 += $(CC_FLAGS_NO_FPU)
178KBUILD_CFLAGS += $(CFLAGS-y)
179
180CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__
181ifdef CONFIG_CPU_BIG_ENDIAN
182CHECKFLAGS += -D__BIG_ENDIAN__
183else
184CHECKFLAGS += -D__LITTLE_ENDIAN__
185endif
186
187ifdef CONFIG_476FPE_ERR46
188 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \
189 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds
190endif
191
192# No prefix or pcrel
193ifdef CONFIG_PPC_KERNEL_PREFIXED
194KBUILD_CFLAGS += $(call cc-option,-mprefixed)
195else
196KBUILD_CFLAGS += $(call cc-option,-mno-prefixed)
197endif
198ifdef CONFIG_PPC_KERNEL_PCREL
199KBUILD_CFLAGS += $(call cc-option,-mpcrel)
200else
201KBUILD_CFLAGS += $(call cc-option,-mno-pcrel)
202endif
203
204# No AltiVec or VSX or MMA instructions when building kernel
205KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
206KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
207KBUILD_CFLAGS += $(call cc-option,-mno-mma)
208
209# No SPE instruction when building kernel
210# (We use all available options to help semi-broken compilers)
211KBUILD_CFLAGS += $(call cc-option,-mno-spe)
212KBUILD_CFLAGS += $(call cc-option,-mspe=no)
213
214# Don't emit .eh_frame since we have no use for it
215KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
216
217# Never use string load/store instructions as they are
218# often slow when they are implemented at all
219KBUILD_CFLAGS += $(call cc-option,-mno-string)
220
221KBUILD_AFLAGS += $(aflags-y)
222KBUILD_CFLAGS += $(cflags-y)
223
224# Default to zImage, override when needed
225all: zImage
226
227# With make 3.82 we cannot mix normal and wildcard targets
228BOOT_TARGETS1 := zImage zImage.initrd uImage
229BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
230
231PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
232
233boot := arch/powerpc/boot
234
235$(BOOT_TARGETS1): vmlinux
236 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
237$(BOOT_TARGETS2): vmlinux
238 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
239
240
241PHONY += bootwrapper_install
242bootwrapper_install:
243 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
244
245include $(srctree)/scripts/Makefile.defconf
246
247generated_configs += ppc64le_defconfig
248ppc64le_defconfig:
249 $(call merge_into_defconfig,ppc64_defconfig,le)
250
251generated_configs += ppc64le_guest_defconfig
252ppc64le_guest_defconfig:
253 $(call merge_into_defconfig,ppc64_defconfig,le guest kvm_guest)
254
255generated_configs += ppc64_guest_defconfig
256ppc64_guest_defconfig:
257 $(call merge_into_defconfig,ppc64_defconfig,be guest kvm_guest)
258
259generated_configs += pseries_le_defconfig
260pseries_le_defconfig: ppc64le_guest_defconfig
261
262generated_configs += pseries_defconfig
263pseries_defconfig: ppc64le_guest_defconfig
264
265generated_configs += powernv_be_defconfig
266powernv_be_defconfig:
267 $(call merge_into_defconfig,powernv_defconfig,be)
268
269generated_configs += mpc85xx_defconfig
270mpc85xx_defconfig:
271 $(call merge_into_defconfig,mpc85xx_base.config,\
272 85xx-32bit 85xx-hw fsl-emb-nonhw)
273
274generated_configs += mpc85xx_smp_defconfig
275mpc85xx_smp_defconfig:
276 $(call merge_into_defconfig,mpc85xx_base.config,\
277 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)
278
279generated_configs += corenet32_smp_defconfig
280corenet32_smp_defconfig:
281 $(call merge_into_defconfig,corenet_base.config,\
282 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa)
283
284generated_configs += corenet64_smp_defconfig
285corenet64_smp_defconfig:
286 $(call merge_into_defconfig,corenet_base.config,\
287 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa)
288
289generated_configs += mpc86xx_defconfig
290mpc86xx_defconfig:
291 $(call merge_into_defconfig,mpc86xx_base.config,\
292 86xx-hw fsl-emb-nonhw)
293
294generated_configs += mpc86xx_smp_defconfig
295mpc86xx_smp_defconfig:
296 $(call merge_into_defconfig,mpc86xx_base.config,\
297 86xx-smp 86xx-hw fsl-emb-nonhw)
298
299generated_configs += ppc32_allmodconfig
300ppc32_allmodconfig:
301 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \
302 -f $(srctree)/Makefile allmodconfig
303
304generated_configs += ppc44x_allmodconfig
305ppc44x_allmodconfig:
306 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/44x.config \
307 -f $(srctree)/Makefile allmodconfig
308
309generated_configs += ppc8xx_allmodconfig
310ppc8xx_allmodconfig:
311 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/8xx.config \
312 -f $(srctree)/Makefile allmodconfig
313
314generated_configs += ppc85xx_allmodconfig
315ppc85xx_allmodconfig:
316 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-32bit.config \
317 -f $(srctree)/Makefile allmodconfig
318
319generated_configs += ppc_defconfig
320ppc_defconfig:
321 $(call merge_into_defconfig,book3s_32.config,)
322
323generated_configs += ppc64le_allmodconfig
324ppc64le_allmodconfig:
325 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \
326 -f $(srctree)/Makefile allmodconfig
327
328generated_configs += ppc64le_allnoconfig
329ppc64le_allnoconfig:
330 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/ppc64le.config \
331 -f $(srctree)/Makefile allnoconfig
332
333generated_configs += ppc64_book3e_allmodconfig
334ppc64_book3e_allmodconfig:
335 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \
336 -f $(srctree)/Makefile allmodconfig
337
338generated_configs += ppc32_randconfig
339ppc32_randconfig:
340 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/32-bit.config \
341 -f $(srctree)/Makefile randconfig
342
343generated_configs += ppc64_randconfig
344ppc64_randconfig:
345 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/64-bit.config \
346 -f $(srctree)/Makefile randconfig
347
348PHONY += $(generated_configs)
349
350define archhelp
351 echo '* zImage - Build default images selected by kernel config'
352 echo ' zImage.* - Compressed kernel image (arch/powerpc/boot/zImage.*)'
353 echo ' uImage - U-Boot native image format'
354 echo ' cuImage.<dt> - Backwards compatible U-Boot image for older'
355 echo ' versions which do not support device trees'
356 echo ' dtbImage.<dt> - zImage with an embedded device tree blob'
357 echo ' simpleImage.<dt> - Firmware independent image.'
358 echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)'
359 echo ' install - Install kernel using'
360 echo ' (your) ~/bin/$(INSTALLKERNEL) or'
361 echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
362 echo ' install to $$(INSTALL_PATH)'
363 echo ' *_defconfig - Select default config from arch/powerpc/configs'
364 echo ''
365 echo ' Targets with <dt> embed a device tree blob inside the image'
366 echo ' These targets support board with firmware that does not'
367 echo ' support passing a device tree directly. Replace <dt> with the'
368 echo ' name of a dts file from the arch/powerpc/boot/dts directory'
369 echo ' (minus the .dts extension).'
370 echo
371 $(foreach cfg,$(generated_configs),
372 printf " %-27s - Build for %s\\n" $(cfg) $(subst _defconfig,,$(cfg));)
373endef
374
375PHONY += install
376install:
377 $(call cmd,install)
378
379ifeq ($(KBUILD_EXTMOD),)
380# We need to generate vdso-offsets.h before compiling certain files in kernel/.
381# In order to do that, we should use the archprepare target, but we can't since
382# asm-offsets.h is included in some files used to generate vdso-offsets.h, and
383# asm-offsets.h is built in prepare0, for which archprepare is a dependency.
384# Therefore we need to generate the header after prepare0 has been made, hence
385# this hack.
386prepare: vdso_prepare
387vdso_prepare: prepare0
388 $(if $(CONFIG_VDSO32),$(Q)$(MAKE) \
389 $(build)=arch/powerpc/kernel/vdso include/generated/vdso32-offsets.h)
390 $(if $(CONFIG_PPC64),$(Q)$(MAKE) \
391 $(build)=arch/powerpc/kernel/vdso include/generated/vdso64-offsets.h)
392endif
393
394archprepare: checkbin
395
396archheaders:
397 $(Q)$(MAKE) $(build)=arch/powerpc/kernel/syscalls all
398
399ifdef CONFIG_STACKPROTECTOR
400prepare: stack_protector_prepare
401
402PHONY += stack_protector_prepare
403stack_protector_prepare: prepare0
404ifdef CONFIG_PPC64
405 $(eval KBUILD_CFLAGS += -mstack-protector-guard=tls -mstack-protector-guard-reg=r13 \
406 -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' \
407 $(objtree)/include/generated/asm-offsets.h))
408else
409 $(eval KBUILD_CFLAGS += -mstack-protector-guard=tls -mstack-protector-guard-reg=r2 \
410 -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' \
411 $(objtree)/include/generated/asm-offsets.h))
412endif
413endif
414
415PHONY += checkbin
416checkbin:
417 @if test "x${CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT}" = "xy" -a \
418 "x${CONFIG_LD_IS_BFD}" = "xy" -a \
419 "${CONFIG_LD_VERSION}" = "23700" ; then \
420 echo -n '*** binutils 2.37 drops unused section symbols, which recordmcount ' ; \
421 echo 'is unable to handle.' ; \
422 echo '*** Please use a different binutils version.' ; \
423 false ; \
424 fi