summaryrefslogtreecommitdiff
path: root/arch/powerpc/Makefile
blob: e91d7e91347d583d51287dceba4f474aa9ef52c3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
# This file is included by the global makefile so that you can add your own
# architecture-specific flags and dependencies.
#
# This file is subject to the terms and conditions of the GNU General Public
# License.  See the file "COPYING" in the main directory of this archive
# for more details.
#
# Copyright (C) 1994 by Linus Torvalds
# Changes for PPC by Gary Thomas
# Rewritten by Cort Dougan and Paul Mackerras
#

HAS_BIARCH	:= $(call cc-option-yn, -m32)

# Set default 32 bits cross compilers for vdso and boot wrapper
CROSS32_COMPILE ?=

# If we're on a ppc/ppc64/ppc64le machine use that defconfig, otherwise just use
# ppc64_defconfig because we have nothing better to go on.
uname := $(shell uname -m)
KBUILD_DEFCONFIG := $(if $(filter ppc%,$(uname)),$(uname),ppc64)_defconfig

new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)

ifeq ($(new_nm),y)
NM		:= $(NM) --synthetic
endif

# BITS is used as extension for files which are available in a 32 bit
# and a 64 bit version to simplify shared Makefiles.
# e.g.: obj-y += foo_$(BITS).o
export BITS

ifdef CONFIG_PPC64
        BITS := 64
else
        BITS := 32
endif

machine-y = ppc
machine-$(CONFIG_PPC64) += 64
machine-$(CONFIG_CPU_LITTLE_ENDIAN) += le
UTS_MACHINE := $(subst $(space),,$(machine-y))

# XXX This needs to be before we override LD below
ifdef CONFIG_PPC32
KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
else
ifeq ($(call ld-ifversion, -ge, 22500, y),y)
# Have the linker provide sfpr if possible.
# There is a corresponding test in arch/powerpc/lib/Makefile
KBUILD_LDFLAGS_MODULE += --save-restore-funcs
else
KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
endif
endif

ifdef CONFIG_CPU_LITTLE_ENDIAN
KBUILD_CFLAGS	+= -mlittle-endian
KBUILD_LDFLAGS	+= -EL
LDEMULATION	:= lppc
GNUTARGET	:= powerpcle
MULTIPLEWORD	:= -mno-multiple
KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect)
else
KBUILD_CFLAGS += $(call cc-option,-mbig-endian)
KBUILD_LDFLAGS	+= -EB
LDEMULATION	:= ppc
GNUTARGET	:= powerpc
MULTIPLEWORD	:= -mmultiple
endif

ifdef CONFIG_PPC64
ifndef CONFIG_CC_IS_CLANG
cflags-$(CONFIG_PPC64_ELF_ABI_V1)	+= $(call cc-option,-mabi=elfv1)
cflags-$(CONFIG_PPC64_ELF_ABI_V1)	+= $(call cc-option,-mcall-aixdesc)
aflags-$(CONFIG_PPC64_ELF_ABI_V1)	+= $(call cc-option,-mabi=elfv1)
aflags-$(CONFIG_PPC64_ELF_ABI_V2)	+= -mabi=elfv2
endif
endif

ifndef CONFIG_CC_IS_CLANG
  cflags-$(CONFIG_CPU_LITTLE_ENDIAN)	+= -mno-strict-align
endif

cflags-$(CONFIG_CPU_BIG_ENDIAN)		+= $(call cc-option,-mbig-endian)
cflags-$(CONFIG_CPU_LITTLE_ENDIAN)	+= -mlittle-endian
aflags-$(CONFIG_CPU_BIG_ENDIAN)		+= $(call cc-option,-mbig-endian)
aflags-$(CONFIG_CPU_LITTLE_ENDIAN)	+= -mlittle-endian

ifeq ($(HAS_BIARCH),y)
KBUILD_CFLAGS	+= -m$(BITS)
KBUILD_AFLAGS	+= -m$(BITS)
KBUILD_LDFLAGS	+= -m elf$(BITS)$(LDEMULATION)
endif

cflags-$(CONFIG_STACKPROTECTOR)	+= -mstack-protector-guard=tls
ifdef CONFIG_PPC64
cflags-$(CONFIG_STACKPROTECTOR)	+= -mstack-protector-guard-reg=r13
else
cflags-$(CONFIG_STACKPROTECTOR)	+= -mstack-protector-guard-reg=r2
endif

LDFLAGS_vmlinux-y := -Bstatic
LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) += -z notext
LDFLAGS_vmlinux	:= $(LDFLAGS_vmlinux-y)

ifdef CONFIG_PPC64
ifeq ($(call cc-option-yn,-mcmodel=medium),y)
	# -mcmodel=medium breaks modules because it uses 32bit offsets from
	# the TOC pointer to create pointers where possible. Pointers into the
	# percpu data area are created by this method.
	#
	# The kernel module loader relocates the percpu data section from the
	# original location (starting with 0xd...) to somewhere in the base
	# kernel percpu data space (starting with 0xc...). We need a full
	# 64bit relocation for this to work, hence -mcmodel=large.
	KBUILD_CFLAGS_MODULE += -mcmodel=large
else
	export NO_MINIMAL_TOC := -mno-minimal-toc
endif
endif

CFLAGS-$(CONFIG_PPC64)	:= $(call cc-option,-mtraceback=no)
ifndef CONFIG_CC_IS_CLANG
ifdef CONFIG_PPC64_ELF_ABI_V2
CFLAGS-$(CONFIG_PPC64)	+= $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc))
AFLAGS-$(CONFIG_PPC64)	+= $(call cc-option,-mabi=elfv2)
else
CFLAGS-$(CONFIG_PPC64)	+= $(call cc-option,-mabi=elfv1)
CFLAGS-$(CONFIG_PPC64)	+= $(call cc-option,-mcall-aixdesc)
AFLAGS-$(CONFIG_PPC64)	+= $(call cc-option,-mabi=elfv1)
endif
endif
CFLAGS-$(CONFIG_PPC64)	+= $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc))
CFLAGS-$(CONFIG_PPC64)	+= $(call cc-option,-mno-pointers-to-nested-functions)

# Clang unconditionally reserves r2 on ppc32 and does not support the flag
# https://bugs.llvm.org/show_bug.cgi?id=39555
CFLAGS-$(CONFIG_PPC32)	:= $(call cc-option, -ffixed-r2)

# Clang doesn't support -mmultiple / -mno-multiple
# https://bugs.llvm.org/show_bug.cgi?id=39556
CFLAGS-$(CONFIG_PPC32)	+= $(call cc-option, $(MULTIPLEWORD))

CFLAGS-$(CONFIG_PPC32)	+= $(call cc-option,-mno-readonly-in-sdata)

ifdef CONFIG_FUNCTION_TRACER
CC_FLAGS_FTRACE := -pg
ifdef CONFIG_MPROFILE_KERNEL
CC_FLAGS_FTRACE += -mprofile-kernel
endif
endif

CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += -mcpu=$(CONFIG_TARGET_CPU)
AFLAGS-$(CONFIG_TARGET_CPU_BOOL) += -mcpu=$(CONFIG_TARGET_CPU)

CFLAGS-$(CONFIG_POWERPC64_CPU) += $(call cc-option,-mtune=power10,	\
				  $(call cc-option,-mtune=power9,	\
				  $(call cc-option,-mtune=power8)))

asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)

KBUILD_CPPFLAGS	+= -I $(srctree)/arch/$(ARCH) $(asinstr)
KBUILD_AFLAGS	+= $(AFLAGS-y)
KBUILD_CFLAGS	+= $(call cc-option,-msoft-float)
KBUILD_CFLAGS	+= -pipe $(CFLAGS-y)
CPP		= $(CC) -E $(KBUILD_CFLAGS)

CHECKFLAGS	+= -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__
ifdef CONFIG_CPU_BIG_ENDIAN
CHECKFLAGS	+= -D__BIG_ENDIAN__
else
CHECKFLAGS	+= -D__LITTLE_ENDIAN__
endif

ifdef CONFIG_476FPE_ERR46
	KBUILD_LDFLAGS_MODULE += --ppc476-workaround \
		-T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds
endif

# No prefix or pcrel
KBUILD_CFLAGS += $(call cc-option,-mno-prefixed)
KBUILD_CFLAGS += $(call cc-option,-mno-pcrel)

# No AltiVec or VSX or MMA instructions when building kernel
KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
KBUILD_CFLAGS += $(call cc-option,-mno-mma)

# No SPE instruction when building kernel
# (We use all available options to help semi-broken compilers)
KBUILD_CFLAGS += $(call cc-option,-mno-spe)
KBUILD_CFLAGS += $(call cc-option,-mspe=no)

# Don't emit .eh_frame since we have no use for it
KBUILD_CFLAGS += -fno-asynchronous-unwind-tables

# Never use string load/store instructions as they are
# often slow when they are implemented at all
KBUILD_CFLAGS		+= $(call cc-option,-mno-string)

cpu-as-$(CONFIG_ALTIVEC)	+= $(call as-option,-Wa$(comma)-maltivec)

# When using '-many -mpower4' gas will first try and find a matching power4
# mnemonic and failing that it will allow any valid mnemonic that GAS knows
# about. GCC will pass -many to GAS when assembling, clang does not.
# LLVM IAS doesn't understand either flag: https://github.com/ClangBuiltLinux/linux/issues/675
# but LLVM IAS only supports ISA >= 2.06 for Book3S 64 anyway...
cpu-as-$(CONFIG_PPC_BOOK3S_64)	+= $(call as-option,-Wa$(comma)-mpower4) $(call as-option,-Wa$(comma)-many)

KBUILD_AFLAGS += $(cpu-as-y)
KBUILD_CFLAGS += $(cpu-as-y)

KBUILD_AFLAGS += $(aflags-y)
KBUILD_CFLAGS += $(cflags-y)

# Default to zImage, override when needed
all: zImage

# With make 3.82 we cannot mix normal and wildcard targets
BOOT_TARGETS1 := zImage zImage.initrd uImage
BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%

PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)

boot := arch/$(ARCH)/boot

$(BOOT_TARGETS1): vmlinux
	$(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
$(BOOT_TARGETS2): vmlinux
	$(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)


PHONY += bootwrapper_install
bootwrapper_install:
	$(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)

include $(srctree)/scripts/Makefile.defconf
PHONY += pseries_le_defconfig
pseries_le_defconfig:
	$(call merge_into_defconfig,pseries_defconfig,le)

PHONY += ppc64le_defconfig
ppc64le_defconfig:
	$(call merge_into_defconfig,ppc64_defconfig,le)

PHONY += ppc64le_guest_defconfig
ppc64le_guest_defconfig:
	$(call merge_into_defconfig,ppc64_defconfig,le guest)

PHONY += ppc64_guest_defconfig
ppc64_guest_defconfig:
	$(call merge_into_defconfig,ppc64_defconfig,be guest)

PHONY += powernv_be_defconfig
powernv_be_defconfig:
	$(call merge_into_defconfig,powernv_defconfig,be)

PHONY += mpc85xx_defconfig
mpc85xx_defconfig:
	$(call merge_into_defconfig,mpc85xx_base.config,\
		85xx-32bit 85xx-hw fsl-emb-nonhw)

PHONY += mpc85xx_smp_defconfig
mpc85xx_smp_defconfig:
	$(call merge_into_defconfig,mpc85xx_base.config,\
		85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)

PHONY += corenet32_smp_defconfig
corenet32_smp_defconfig:
	$(call merge_into_defconfig,corenet_base.config,\
		85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa)

PHONY += corenet64_smp_defconfig
corenet64_smp_defconfig:
	$(call merge_into_defconfig,corenet_base.config,\
		85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa)

PHONY += mpc86xx_defconfig
mpc86xx_defconfig:
	$(call merge_into_defconfig,mpc86xx_base.config,\
		86xx-hw fsl-emb-nonhw)

PHONY += mpc86xx_smp_defconfig
mpc86xx_smp_defconfig:
	$(call merge_into_defconfig,mpc86xx_base.config,\
		86xx-smp 86xx-hw fsl-emb-nonhw)

PHONY += ppc32_allmodconfig
ppc32_allmodconfig:
	$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \
		-f $(srctree)/Makefile allmodconfig

PHONY += ppc_defconfig
ppc_defconfig:
	$(call merge_into_defconfig,book3s_32.config,)

PHONY += ppc64le_allmodconfig
ppc64le_allmodconfig:
	$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \
		-f $(srctree)/Makefile allmodconfig

PHONY += ppc64le_allnoconfig
ppc64le_allnoconfig:
	$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/ppc64le.config \
		-f $(srctree)/Makefile allnoconfig

PHONY += ppc64_book3e_allmodconfig
ppc64_book3e_allmodconfig:
	$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \
		-f $(srctree)/Makefile allmodconfig

PHONY += ppc32_randconfig
ppc32_randconfig:
	$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/32-bit.config \
		-f $(srctree)/Makefile randconfig

PHONY += ppc64_randconfig
ppc64_randconfig:
	$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/64-bit.config \
		-f $(srctree)/Makefile randconfig

define archhelp
  @echo '* zImage          - Build default images selected by kernel config'
  @echo '  zImage.*        - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
  @echo '  uImage          - U-Boot native image format'
  @echo '  cuImage.<dt>    - Backwards compatible U-Boot image for older'
  @echo '                    versions which do not support device trees'
  @echo '  dtbImage.<dt>   - zImage with an embedded device tree blob'
  @echo '  simpleImage.<dt> - Firmware independent image.'
  @echo '  treeImage.<dt>  - Support for older IBM 4xx firmware (not U-Boot)'
  @echo '  install         - Install kernel using'
  @echo '                    (your) ~/bin/$(INSTALLKERNEL) or'
  @echo '                    (distribution) /sbin/$(INSTALLKERNEL) or'
  @echo '                    install to $$(INSTALL_PATH) and run lilo'
  @echo '  *_defconfig     - Select default config from arch/$(ARCH)/configs'
  @echo ''
  @echo '  Targets with <dt> embed a device tree blob inside the image'
  @echo '  These targets support board with firmware that does not'
  @echo '  support passing a device tree directly.  Replace <dt> with the'
  @echo '  name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
  @echo '  (minus the .dts extension).'
endef

PHONY += install
install:
	$(call cmd,install)

ifeq ($(KBUILD_EXTMOD),)
# We need to generate vdso-offsets.h before compiling certain files in kernel/.
# In order to do that, we should use the archprepare target, but we can't since
# asm-offsets.h is included in some files used to generate vdso-offsets.h, and
# asm-offsets.h is built in prepare0, for which archprepare is a dependency.
# Therefore we need to generate the header after prepare0 has been made, hence
# this hack.
prepare: vdso_prepare
vdso_prepare: prepare0
	$(if $(CONFIG_VDSO32),$(Q)$(MAKE) \
		$(build)=arch/powerpc/kernel/vdso include/generated/vdso32-offsets.h)
	$(if $(CONFIG_PPC64),$(Q)$(MAKE) \
		$(build)=arch/powerpc/kernel/vdso include/generated/vdso64-offsets.h)
endif

archprepare: checkbin

archheaders:
	$(Q)$(MAKE) $(build)=arch/powerpc/kernel/syscalls all

ifdef CONFIG_STACKPROTECTOR
prepare: stack_protector_prepare

PHONY += stack_protector_prepare
stack_protector_prepare: prepare0
ifdef CONFIG_PPC64
	$(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' include/generated/asm-offsets.h))
else
	$(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' include/generated/asm-offsets.h))
endif
endif

PHONY += checkbin
# Check toolchain versions:
# - gcc-4.6 is the minimum kernel-wide version so nothing required.
checkbin:
	@if test "x${CONFIG_LD_IS_LLD}" != "xy" -a \
		"x$(call ld-ifversion, -le, 22400, y)" = "xy" ; then \
		echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \
		echo 'in some circumstances.' ; \
		echo    '*** binutils 2.23 do not define the TOC symbol ' ; \
		echo -n '*** Please use a different binutils version.' ; \
		false ; \
	fi