xref: /openbmc/linux/arch/powerpc/Makefile (revision c819e2cf)
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 -mno-strict-align
70override AS	+= -mlittle-endian
71override LD	+= -EL
72override CROSS32CC += -mlittle-endian
73override CROSS32AS += -mlittle-endian
74LDEMULATION	:= lppc
75GNUTARGET	:= powerpcle
76MULTIPLEWORD	:= -mno-multiple
77KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect)
78else
79ifeq ($(call cc-option-yn,-mbig-endian),y)
80override CC	+= -mbig-endian
81override AS	+= -mbig-endian
82endif
83override LD	+= -EB
84LDEMULATION	:= ppc
85GNUTARGET	:= powerpc
86MULTIPLEWORD	:= -mmultiple
87endif
88
89ifeq ($(HAS_BIARCH),y)
90override AS	+= -a$(CONFIG_WORD_SIZE)
91override LD	+= -m elf$(CONFIG_WORD_SIZE)$(LDEMULATION)
92override CC	+= -m$(CONFIG_WORD_SIZE)
93override AR	:= GNUTARGET=elf$(CONFIG_WORD_SIZE)-$(GNUTARGET) $(AR)
94endif
95
96LDFLAGS_vmlinux-y := -Bstatic
97LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
98LDFLAGS_vmlinux	:= $(LDFLAGS_vmlinux-y)
99
100ifeq ($(CONFIG_PPC64),y)
101ifeq ($(call cc-option-yn,-mcmodel=medium),y)
102	# -mcmodel=medium breaks modules because it uses 32bit offsets from
103	# the TOC pointer to create pointers where possible. Pointers into the
104	# percpu data area are created by this method.
105	#
106	# The kernel module loader relocates the percpu data section from the
107	# original location (starting with 0xd...) to somewhere in the base
108	# kernel percpu data space (starting with 0xc...). We need a full
109	# 64bit relocation for this to work, hence -mcmodel=large.
110	KBUILD_CFLAGS_MODULE += -mcmodel=large
111else
112	export NO_MINIMAL_TOC := -mno-minimal-toc
113endif
114endif
115
116CFLAGS-$(CONFIG_PPC64)	:= -mtraceback=no
117ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
118CFLAGS-$(CONFIG_PPC64)	+= $(call cc-option,-mabi=elfv2,-mcall-aixdesc)
119AFLAGS-$(CONFIG_PPC64)	+= $(call cc-option,-mabi=elfv2)
120else
121CFLAGS-$(CONFIG_PPC64)	+= -mcall-aixdesc
122endif
123CFLAGS-$(CONFIG_PPC64)	+= $(call cc-option,-mcmodel=medium,-mminimal-toc)
124CFLAGS-$(CONFIG_PPC64)	+= $(call cc-option,-mno-pointers-to-nested-functions)
125CFLAGS-$(CONFIG_PPC32)	:= -ffixed-r2 $(MULTIPLEWORD)
126
127ifeq ($(CONFIG_PPC_BOOK3S_64),y)
128CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,-mtune=power4)
129else
130CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
131endif
132
133CFLAGS-$(CONFIG_CELL_CPU) += $(call cc-option,-mcpu=cell)
134CFLAGS-$(CONFIG_POWER4_CPU) += $(call cc-option,-mcpu=power4)
135CFLAGS-$(CONFIG_POWER5_CPU) += $(call cc-option,-mcpu=power5)
136CFLAGS-$(CONFIG_POWER6_CPU) += $(call cc-option,-mcpu=power6)
137CFLAGS-$(CONFIG_POWER7_CPU) += $(call cc-option,-mcpu=power7)
138CFLAGS-$(CONFIG_POWER8_CPU) += $(call cc-option,-mcpu=power8)
139
140# Altivec option not allowed with e500mc64 in GCC.
141ifeq ($(CONFIG_ALTIVEC),y)
142E5500_CPU := -mcpu=powerpc64
143else
144E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
145endif
146CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU)
147CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
148
149ifeq ($(CONFIG_PPC32),y)
150ifeq ($(CONFIG_PPC_E500MC),y)
151CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc)
152else
153CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc)
154endif
155endif
156
157CFLAGS-$(CONFIG_TUNE_CELL) += $(call cc-option,-mtune=cell)
158
159asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
160
161KBUILD_CPPFLAGS	+= -Iarch/$(ARCH) $(asinstr)
162KBUILD_AFLAGS	+= -Iarch/$(ARCH) $(AFLAGS-y)
163KBUILD_CFLAGS	+= -msoft-float -pipe -Iarch/$(ARCH) $(CFLAGS-y)
164CPP		= $(CC) -E $(KBUILD_CFLAGS)
165
166CHECKFLAGS	+= -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__
167
168KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
169
170ifeq ($(CONFIG_476FPE_ERR46),y)
171	KBUILD_LDFLAGS_MODULE += --ppc476-workaround \
172		-T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds
173endif
174
175# No AltiVec or VSX instructions when building kernel
176KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
177KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
178
179# No SPE instruction when building kernel
180# (We use all available options to help semi-broken compilers)
181KBUILD_CFLAGS += $(call cc-option,-mno-spe)
182KBUILD_CFLAGS += $(call cc-option,-mspe=no)
183
184# Enable unit-at-a-time mode when possible. It shrinks the
185# kernel considerably.
186KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
187
188# FIXME: the module load should be taught about the additional relocs
189# generated by this.
190# revert to pre-gcc-4.4 behaviour of .eh_frame
191KBUILD_CFLAGS	+= $(call cc-option,-fno-dwarf2-cfi-asm)
192
193# Never use string load/store instructions as they are
194# often slow when they are implemented at all
195KBUILD_CFLAGS		+= -mno-string
196
197ifeq ($(CONFIG_6xx),y)
198KBUILD_CFLAGS		+= -mcpu=powerpc
199endif
200
201# Work around a gcc code-gen bug with -fno-omit-frame-pointer.
202ifeq ($(CONFIG_FUNCTION_TRACER),y)
203KBUILD_CFLAGS		+= -mno-sched-epilog
204endif
205
206cpu-as-$(CONFIG_4xx)		+= -Wa,-m405
207cpu-as-$(CONFIG_ALTIVEC)	+= -Wa,-maltivec
208cpu-as-$(CONFIG_E200)		+= -Wa,-me200
209
210KBUILD_AFLAGS += $(cpu-as-y)
211KBUILD_CFLAGS += $(cpu-as-y)
212
213head-y				:= arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o
214head-$(CONFIG_8xx)		:= arch/powerpc/kernel/head_8xx.o
215head-$(CONFIG_40x)		:= arch/powerpc/kernel/head_40x.o
216head-$(CONFIG_44x)		:= arch/powerpc/kernel/head_44x.o
217head-$(CONFIG_FSL_BOOKE)	:= arch/powerpc/kernel/head_fsl_booke.o
218
219head-$(CONFIG_PPC64)		+= arch/powerpc/kernel/entry_64.o
220head-$(CONFIG_PPC_FPU)		+= arch/powerpc/kernel/fpu.o
221head-$(CONFIG_ALTIVEC)		+= arch/powerpc/kernel/vector.o
222head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE)  += arch/powerpc/kernel/prom_init.o
223
224core-y				+= arch/powerpc/kernel/ \
225				   arch/powerpc/mm/ \
226				   arch/powerpc/lib/ \
227				   arch/powerpc/sysdev/ \
228				   arch/powerpc/platforms/ \
229				   arch/powerpc/math-emu/ \
230				   arch/powerpc/crypto/ \
231				   arch/powerpc/net/
232core-$(CONFIG_XMON)		+= arch/powerpc/xmon/
233core-$(CONFIG_KVM) 		+= arch/powerpc/kvm/
234core-$(CONFIG_PERF_EVENTS)	+= arch/powerpc/perf/
235
236drivers-$(CONFIG_OPROFILE)	+= arch/powerpc/oprofile/
237
238# Default to zImage, override when needed
239all: zImage
240
241# With make 3.82 we cannot mix normal and wildcard targets
242BOOT_TARGETS1 := zImage zImage.initrd uImage
243BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
244
245PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
246
247boot := arch/$(ARCH)/boot
248
249ifeq ($(CONFIG_RELOCATABLE),y)
250quiet_cmd_relocs_check = CALL    $<
251      cmd_relocs_check = perl $< "$(OBJDUMP)" "$(obj)/vmlinux"
252
253PHONY += relocs_check
254relocs_check: arch/powerpc/relocs_check.pl vmlinux
255	$(call cmd,relocs_check)
256
257zImage: relocs_check
258endif
259
260$(BOOT_TARGETS1): vmlinux
261	$(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
262$(BOOT_TARGETS2): vmlinux
263	$(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
264
265
266bootwrapper_install:
267	$(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
268
269%.dtb: scripts
270	$(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
271
272define archhelp
273  @echo '* zImage          - Build default images selected by kernel config'
274  @echo '  zImage.*        - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
275  @echo '  uImage          - U-Boot native image format'
276  @echo '  cuImage.<dt>    - Backwards compatible U-Boot image for older'
277  @echo '                    versions which do not support device trees'
278  @echo '  dtbImage.<dt>   - zImage with an embedded device tree blob'
279  @echo '  simpleImage.<dt> - Firmware independent image.'
280  @echo '  treeImage.<dt>  - Support for older IBM 4xx firmware (not U-Boot)'
281  @echo '  install         - Install kernel using'
282  @echo '                    (your) ~/bin/$(INSTALLKERNEL) or'
283  @echo '                    (distribution) /sbin/$(INSTALLKERNEL) or'
284  @echo '                    install to $$(INSTALL_PATH) and run lilo'
285  @echo '  *_defconfig     - Select default config from arch/$(ARCH)/configs'
286  @echo ''
287  @echo '  Targets with <dt> embed a device tree blob inside the image'
288  @echo '  These targets support board with firmware that does not'
289  @echo '  support passing a device tree directly.  Replace <dt> with the'
290  @echo '  name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
291  @echo '  (minus the .dts extension).'
292endef
293
294install:
295	$(Q)$(MAKE) $(build)=$(boot) install
296
297vdso_install:
298ifeq ($(CONFIG_PPC64),y)
299	$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
300endif
301	$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
302
303archclean:
304	$(Q)$(MAKE) $(clean)=$(boot)
305
306archprepare: checkbin
307
308# Use the file '.tmp_gas_check' for binutils tests, as gas won't output
309# to stdout and these checks are run even on install targets.
310TOUT	:= .tmp_gas_check
311
312# Check gcc and binutils versions:
313# - gcc-3.4 and binutils-2.14 are a fatal combination
314# - Require gcc 4.0 or above on 64-bit
315# - gcc-4.2.0 has issues compiling modules on 64-bit
316checkbin:
317	@if test "$(call cc-version)" = "0304" ; then \
318		if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
319			echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
320			echo 'correctly with gcc-3.4 and your version of binutils.'; \
321			echo '*** Please upgrade your binutils or downgrade your gcc'; \
322			false; \
323		fi ; \
324	fi
325	@if test "$(call cc-version)" -lt "0400" \
326	    && test "x${CONFIG_PPC64}" = "xy" ; then \
327                echo -n "Sorry, GCC v4.0 or above is required to build " ; \
328                echo "the 64-bit powerpc kernel." ; \
329                false ; \
330        fi
331	@if test "$(call cc-fullversion)" = "040200" \
332	    && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
333		echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
334		echo 'kernel with modules enabled.' ; \
335		echo -n '*** Please use a different GCC version or ' ; \
336		echo 'disable kernel modules' ; \
337		false ; \
338	fi
339
340CLEAN_FILES += $(TOUT)
341
342