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
26CROSS32AR	:= GNUTARGET=elf32-powerpc $(AR)
27endif
28endif
29
30export CROSS32CC CROSS32AR
31
32ifeq ($(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		:= $(NM) --synthetic
43endif
44endif
45
46ifeq ($(CONFIG_PPC64),y)
47ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
48OLDARCH	:= ppc64le
49else
50OLDARCH	:= ppc64
51endif
52else
53ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
54OLDARCH	:= ppcle
55else
56OLDARCH	:= ppc
57endif
58endif
59
60# It seems there are times we use this Makefile without
61# including the config file, but this replicates the old behaviour
62ifeq ($(CONFIG_WORD_SIZE),)
63CONFIG_WORD_SIZE := 32
64endif
65
66UTS_MACHINE := $(OLDARCH)
67
68ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
69override CC	+= -mlittle-endian
70ifneq ($(cc-name),clang)
71override CC	+= -mno-strict-align
72endif
73override AS	+= -mlittle-endian
74override LD	+= -EL
75override CROSS32CC += -mlittle-endian
76override CROSS32AS += -mlittle-endian
77LDEMULATION	:= lppc
78GNUTARGET	:= powerpcle
79MULTIPLEWORD	:= -mno-multiple
80KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect)
81else
82ifeq ($(call cc-option-yn,-mbig-endian),y)
83override CC	+= -mbig-endian
84override AS	+= -mbig-endian
85endif
86override LD	+= -EB
87LDEMULATION	:= ppc
88GNUTARGET	:= powerpc
89MULTIPLEWORD	:= -mmultiple
90endif
91
92ifeq ($(HAS_BIARCH),y)
93override AS	+= -a$(CONFIG_WORD_SIZE)
94override LD	+= -m elf$(CONFIG_WORD_SIZE)$(LDEMULATION)
95override CC	+= -m$(CONFIG_WORD_SIZE)
96override AR	:= GNUTARGET=elf$(CONFIG_WORD_SIZE)-$(GNUTARGET) $(AR)
97endif
98
99LDFLAGS_vmlinux-y := -Bstatic
100LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
101LDFLAGS_vmlinux	:= $(LDFLAGS_vmlinux-y)
102
103ifeq ($(CONFIG_PPC64),y)
104ifeq ($(call cc-option-yn,-mcmodel=medium),y)
105	# -mcmodel=medium breaks modules because it uses 32bit offsets from
106	# the TOC pointer to create pointers where possible. Pointers into the
107	# percpu data area are created by this method.
108	#
109	# The kernel module loader relocates the percpu data section from the
110	# original location (starting with 0xd...) to somewhere in the base
111	# kernel percpu data space (starting with 0xc...). We need a full
112	# 64bit relocation for this to work, hence -mcmodel=large.
113	KBUILD_CFLAGS_MODULE += -mcmodel=large
114else
115	export NO_MINIMAL_TOC := -mno-minimal-toc
116endif
117endif
118
119CFLAGS-$(CONFIG_PPC64)	:= $(call cc-option,-mtraceback=no)
120ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
121CFLAGS-$(CONFIG_PPC64)	+= $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc))
122AFLAGS-$(CONFIG_PPC64)	+= $(call cc-option,-mabi=elfv2)
123else
124CFLAGS-$(CONFIG_PPC64)	+= $(call cc-option,-mcall-aixdesc)
125endif
126CFLAGS-$(CONFIG_PPC64)	+= $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc))
127CFLAGS-$(CONFIG_PPC64)	+= $(call cc-option,-mno-pointers-to-nested-functions)
128CFLAGS-$(CONFIG_PPC32)	:= -ffixed-r2 $(MULTIPLEWORD)
129
130ifeq ($(CONFIG_PPC_BOOK3S_64),y)
131CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,-mtune=power4)
132else
133CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
134endif
135
136CFLAGS-$(CONFIG_CELL_CPU) += $(call cc-option,-mcpu=cell)
137CFLAGS-$(CONFIG_POWER4_CPU) += $(call cc-option,-mcpu=power4)
138CFLAGS-$(CONFIG_POWER5_CPU) += $(call cc-option,-mcpu=power5)
139CFLAGS-$(CONFIG_POWER6_CPU) += $(call cc-option,-mcpu=power6)
140CFLAGS-$(CONFIG_POWER7_CPU) += $(call cc-option,-mcpu=power7)
141CFLAGS-$(CONFIG_POWER8_CPU) += $(call cc-option,-mcpu=power8)
142
143# Altivec option not allowed with e500mc64 in GCC.
144ifeq ($(CONFIG_ALTIVEC),y)
145E5500_CPU := -mcpu=powerpc64
146else
147E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
148endif
149CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU)
150CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
151
152ifeq ($(CONFIG_PPC32),y)
153ifeq ($(CONFIG_PPC_E500MC),y)
154CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc)
155else
156CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc)
157endif
158endif
159
160asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
161
162KBUILD_CPPFLAGS	+= -Iarch/$(ARCH) $(asinstr)
163KBUILD_AFLAGS	+= -Iarch/$(ARCH) $(AFLAGS-y)
164KBUILD_CFLAGS	+= $(call cc-option,-msoft-float)
165KBUILD_CFLAGS	+= -pipe -Iarch/$(ARCH) $(CFLAGS-y)
166CPP		= $(CC) -E $(KBUILD_CFLAGS)
167
168CHECKFLAGS	+= -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__
169
170KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
171
172ifeq ($(CONFIG_476FPE_ERR46),y)
173	KBUILD_LDFLAGS_MODULE += --ppc476-workaround \
174		-T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds
175endif
176
177# No AltiVec or VSX instructions when building kernel
178KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
179KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
180
181# No SPE instruction when building kernel
182# (We use all available options to help semi-broken compilers)
183KBUILD_CFLAGS += $(call cc-option,-mno-spe)
184KBUILD_CFLAGS += $(call cc-option,-mspe=no)
185
186# Enable unit-at-a-time mode when possible. It shrinks the
187# kernel considerably.
188KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
189
190# FIXME: the module load should be taught about the additional relocs
191# generated by this.
192# revert to pre-gcc-4.4 behaviour of .eh_frame
193KBUILD_CFLAGS	+= $(call cc-option,-fno-dwarf2-cfi-asm)
194
195# Never use string load/store instructions as they are
196# often slow when they are implemented at all
197KBUILD_CFLAGS		+= $(call cc-option,-mno-string)
198
199ifeq ($(CONFIG_6xx),y)
200KBUILD_CFLAGS		+= -mcpu=powerpc
201endif
202
203# Work around a gcc code-gen bug with -fno-omit-frame-pointer.
204ifeq ($(CONFIG_FUNCTION_TRACER),y)
205KBUILD_CFLAGS		+= -mno-sched-epilog
206endif
207
208cpu-as-$(CONFIG_4xx)		+= -Wa,-m405
209cpu-as-$(CONFIG_ALTIVEC)	+= -Wa,-maltivec
210cpu-as-$(CONFIG_E200)		+= -Wa,-me200
211
212KBUILD_AFLAGS += $(cpu-as-y)
213KBUILD_CFLAGS += $(cpu-as-y)
214
215head-y				:= arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o
216head-$(CONFIG_8xx)		:= arch/powerpc/kernel/head_8xx.o
217head-$(CONFIG_40x)		:= arch/powerpc/kernel/head_40x.o
218head-$(CONFIG_44x)		:= arch/powerpc/kernel/head_44x.o
219head-$(CONFIG_FSL_BOOKE)	:= arch/powerpc/kernel/head_fsl_booke.o
220
221head-$(CONFIG_PPC64)		+= arch/powerpc/kernel/entry_64.o
222head-$(CONFIG_PPC_FPU)		+= arch/powerpc/kernel/fpu.o
223head-$(CONFIG_ALTIVEC)		+= arch/powerpc/kernel/vector.o
224head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE)  += arch/powerpc/kernel/prom_init.o
225
226core-y				+= arch/powerpc/kernel/ \
227				   arch/powerpc/mm/ \
228				   arch/powerpc/lib/ \
229				   arch/powerpc/sysdev/ \
230				   arch/powerpc/platforms/ \
231				   arch/powerpc/math-emu/ \
232				   arch/powerpc/crypto/ \
233				   arch/powerpc/net/
234core-$(CONFIG_XMON)		+= arch/powerpc/xmon/
235core-$(CONFIG_KVM) 		+= arch/powerpc/kvm/
236core-$(CONFIG_PERF_EVENTS)	+= arch/powerpc/perf/
237
238drivers-$(CONFIG_OPROFILE)	+= arch/powerpc/oprofile/
239
240# Default to zImage, override when needed
241all: zImage
242
243# With make 3.82 we cannot mix normal and wildcard targets
244BOOT_TARGETS1 := zImage zImage.initrd uImage
245BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
246
247PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
248
249boot := arch/$(ARCH)/boot
250
251ifeq ($(CONFIG_RELOCATABLE),y)
252quiet_cmd_relocs_check = CALL    $<
253      cmd_relocs_check = $(CONFIG_SHELL) $< "$(OBJDUMP)" "$(obj)/vmlinux"
254
255PHONY += relocs_check
256relocs_check: arch/powerpc/relocs_check.sh vmlinux
257	$(call cmd,relocs_check)
258
259zImage: relocs_check
260endif
261
262$(BOOT_TARGETS1): vmlinux
263	$(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
264$(BOOT_TARGETS2): vmlinux
265	$(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
266
267
268bootwrapper_install:
269	$(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
270
271%.dtb: scripts
272	$(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
273
274# Used to create 'merged defconfigs'
275# To use it $(call) it with the first argument as the base defconfig
276# and the second argument as a space separated list of .config files to merge,
277# without the .config suffix.
278define merge_into_defconfig
279	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
280		-m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \
281		$(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config)
282	+$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
283endef
284
285PHONY += pseries_le_defconfig
286pseries_le_defconfig:
287	$(call merge_into_defconfig,pseries_defconfig,le)
288
289PHONY += ppc64le_defconfig
290ppc64le_defconfig:
291	$(call merge_into_defconfig,ppc64_defconfig,le)
292
293PHONY += mpc85xx_defconfig
294mpc85xx_defconfig:
295	$(call merge_into_defconfig,mpc85xx_basic_defconfig,\
296		85xx-32bit 85xx-hw fsl-emb-nonhw)
297
298PHONY += mpc85xx_smp_defconfig
299mpc85xx_smp_defconfig:
300	$(call merge_into_defconfig,mpc85xx_basic_defconfig,\
301		85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)
302
303PHONY += corenet32_smp_defconfig
304corenet32_smp_defconfig:
305	$(call merge_into_defconfig,corenet_basic_defconfig,\
306		85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)
307
308PHONY += corenet64_smp_defconfig
309corenet64_smp_defconfig:
310	$(call merge_into_defconfig,corenet_basic_defconfig,\
311		85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw)
312
313define archhelp
314  @echo '* zImage          - Build default images selected by kernel config'
315  @echo '  zImage.*        - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
316  @echo '  uImage          - U-Boot native image format'
317  @echo '  cuImage.<dt>    - Backwards compatible U-Boot image for older'
318  @echo '                    versions which do not support device trees'
319  @echo '  dtbImage.<dt>   - zImage with an embedded device tree blob'
320  @echo '  simpleImage.<dt> - Firmware independent image.'
321  @echo '  treeImage.<dt>  - Support for older IBM 4xx firmware (not U-Boot)'
322  @echo '  install         - Install kernel using'
323  @echo '                    (your) ~/bin/$(INSTALLKERNEL) or'
324  @echo '                    (distribution) /sbin/$(INSTALLKERNEL) or'
325  @echo '                    install to $$(INSTALL_PATH) and run lilo'
326  @echo '  *_defconfig     - Select default config from arch/$(ARCH)/configs'
327  @echo ''
328  @echo '  Targets with <dt> embed a device tree blob inside the image'
329  @echo '  These targets support board with firmware that does not'
330  @echo '  support passing a device tree directly.  Replace <dt> with the'
331  @echo '  name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
332  @echo '  (minus the .dts extension).'
333endef
334
335install:
336	$(Q)$(MAKE) $(build)=$(boot) install
337
338vdso_install:
339ifeq ($(CONFIG_PPC64),y)
340	$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
341endif
342	$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
343
344archclean:
345	$(Q)$(MAKE) $(clean)=$(boot)
346
347archprepare: checkbin
348
349# Use the file '.tmp_gas_check' for binutils tests, as gas won't output
350# to stdout and these checks are run even on install targets.
351TOUT	:= .tmp_gas_check
352
353# Check gcc and binutils versions:
354# - gcc-3.4 and binutils-2.14 are a fatal combination
355# - Require gcc 4.0 or above on 64-bit
356# - gcc-4.2.0 has issues compiling modules on 64-bit
357checkbin:
358	@if test "$(cc-name)" != "clang" \
359	    && test "$(cc-version)" = "0304" ; then \
360		if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
361			echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
362			echo 'correctly with gcc-3.4 and your version of binutils.'; \
363			echo '*** Please upgrade your binutils or downgrade your gcc'; \
364			false; \
365		fi ; \
366	fi
367	@if test "$(cc-name)" != "clang" \
368	    && test "$(cc-version)" -lt "0400" \
369	    && test "x${CONFIG_PPC64}" = "xy" ; then \
370                echo -n "Sorry, GCC v4.0 or above is required to build " ; \
371                echo "the 64-bit powerpc kernel." ; \
372                false ; \
373        fi
374	@if test "$(cc-name)" != "clang" \
375	    && test "$(cc-fullversion)" = "040200" \
376	    && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
377		echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
378		echo 'kernel with modules enabled.' ; \
379		echo -n '*** Please use a different GCC version or ' ; \
380		echo 'disable kernel modules' ; \
381		false ; \
382	fi
383	@if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \
384	    && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \
385		echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \
386		echo 'in some circumstances.' ; \
387		echo -n '*** Please use a different binutils version.' ; \
388		false ; \
389	fi
390
391
392CLEAN_FILES += $(TOUT)
393
394