tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 -mcall-aixdesc
117CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
118CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,-mminimal-toc)
119CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions)
120CFLAGS-$(CONFIG_PPC32) := -ffixed-r2 $(MULTIPLEWORD)
121
122ifeq ($(CONFIG_PPC_BOOK3S_64),y)
123CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,-mtune=power4)
124else
125CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
126endif
127
128CFLAGS-$(CONFIG_CELL_CPU) += $(call cc-option,-mcpu=cell)
129CFLAGS-$(CONFIG_POWER4_CPU) += $(call cc-option,-mcpu=power4)
130CFLAGS-$(CONFIG_POWER5_CPU) += $(call cc-option,-mcpu=power5)
131CFLAGS-$(CONFIG_POWER6_CPU) += $(call cc-option,-mcpu=power6)
132CFLAGS-$(CONFIG_POWER7_CPU) += $(call cc-option,-mcpu=power7)
133
134# Altivec option not allowed with e500mc64 in GCC.
135ifeq ($(CONFIG_ALTIVEC),y)
136E5500_CPU := -mcpu=powerpc64
137else
138E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
139endif
140CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU)
141CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
142
143ifeq ($(CONFIG_PPC32),y)
144ifeq ($(CONFIG_PPC_E500MC),y)
145CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc)
146else
147CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc)
148endif
149endif
150
151CFLAGS-$(CONFIG_TUNE_CELL) += $(call cc-option,-mtune=cell)
152
153asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
154
155KBUILD_CPPFLAGS += -Iarch/$(ARCH) $(asinstr)
156KBUILD_AFLAGS += -Iarch/$(ARCH)
157KBUILD_CFLAGS += -msoft-float -pipe -Iarch/$(ARCH) $(CFLAGS-y)
158CPP = $(CC) -E $(KBUILD_CFLAGS)
159
160CHECKFLAGS += -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__
161
162KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
163
164# No AltiVec or VSX instructions when building kernel
165KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
166KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
167
168# No SPE instruction when building kernel
169# (We use all available options to help semi-broken compilers)
170KBUILD_CFLAGS += $(call cc-option,-mno-spe)
171KBUILD_CFLAGS += $(call cc-option,-mspe=no)
172
173# Enable unit-at-a-time mode when possible. It shrinks the
174# kernel considerably.
175KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
176
177# FIXME: the module load should be taught about the additional relocs
178# generated by this.
179# revert to pre-gcc-4.4 behaviour of .eh_frame
180KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
181
182# Never use string load/store instructions as they are
183# often slow when they are implemented at all
184KBUILD_CFLAGS += -mno-string
185
186ifeq ($(CONFIG_6xx),y)
187KBUILD_CFLAGS += -mcpu=powerpc
188endif
189
190# Work around a gcc code-gen bug with -fno-omit-frame-pointer.
191ifeq ($(CONFIG_FUNCTION_TRACER),y)
192KBUILD_CFLAGS += -mno-sched-epilog
193endif
194
195cpu-as-$(CONFIG_4xx) += -Wa,-m405
196cpu-as-$(CONFIG_ALTIVEC) += -Wa,-maltivec
197cpu-as-$(CONFIG_E200) += -Wa,-me200
198
199KBUILD_AFLAGS += $(cpu-as-y)
200KBUILD_CFLAGS += $(cpu-as-y)
201
202head-y := arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o
203head-$(CONFIG_8xx) := arch/powerpc/kernel/head_8xx.o
204head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o
205head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o
206head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o
207
208head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o
209head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o
210head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o
211head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o
212
213core-y += arch/powerpc/kernel/ \
214 arch/powerpc/mm/ \
215 arch/powerpc/lib/ \
216 arch/powerpc/sysdev/ \
217 arch/powerpc/platforms/ \
218 arch/powerpc/math-emu/ \
219 arch/powerpc/crypto/ \
220 arch/powerpc/net/
221core-$(CONFIG_XMON) += arch/powerpc/xmon/
222core-$(CONFIG_KVM) += arch/powerpc/kvm/
223core-$(CONFIG_PERF_EVENTS) += arch/powerpc/perf/
224
225drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/
226
227# Default to zImage, override when needed
228all: zImage
229
230# With make 3.82 we cannot mix normal and wildcard targets
231BOOT_TARGETS1 := zImage zImage.initrd uImage
232BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
233
234PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
235
236boot := arch/$(ARCH)/boot
237
238ifeq ($(CONFIG_RELOCATABLE),y)
239quiet_cmd_relocs_check = CALL $<
240 cmd_relocs_check = perl $< "$(OBJDUMP)" "$(obj)/vmlinux"
241
242PHONY += relocs_check
243relocs_check: arch/powerpc/relocs_check.pl vmlinux
244 $(call cmd,relocs_check)
245
246zImage: relocs_check
247endif
248
249$(BOOT_TARGETS1): vmlinux
250 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
251$(BOOT_TARGETS2): vmlinux
252 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
253
254
255bootwrapper_install:
256 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
257
258%.dtb: scripts
259 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
260
261define archhelp
262 @echo '* zImage - Build default images selected by kernel config'
263 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
264 @echo ' uImage - U-Boot native image format'
265 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older'
266 @echo ' versions which do not support device trees'
267 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob'
268 @echo ' simpleImage.<dt> - Firmware independent image.'
269 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)'
270 @echo ' install - Install kernel using'
271 @echo ' (your) ~/bin/$(INSTALLKERNEL) or'
272 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
273 @echo ' install to $$(INSTALL_PATH) and run lilo'
274 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs'
275 @echo ''
276 @echo ' Targets with <dt> embed a device tree blob inside the image'
277 @echo ' These targets support board with firmware that does not'
278 @echo ' support passing a device tree directly. Replace <dt> with the'
279 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
280 @echo ' (minus the .dts extension).'
281endef
282
283install:
284 $(Q)$(MAKE) $(build)=$(boot) install
285
286vdso_install:
287ifeq ($(CONFIG_PPC64),y)
288 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
289endif
290 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
291
292archclean:
293 $(Q)$(MAKE) $(clean)=$(boot)
294
295archprepare: checkbin
296
297# Use the file '.tmp_gas_check' for binutils tests, as gas won't output
298# to stdout and these checks are run even on install targets.
299TOUT := .tmp_gas_check
300
301# Check gcc and binutils versions:
302# - gcc-3.4 and binutils-2.14 are a fatal combination
303# - Require gcc 4.0 or above on 64-bit
304# - gcc-4.2.0 has issues compiling modules on 64-bit
305checkbin:
306 @if test "$(call cc-version)" = "0304" ; then \
307 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
308 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
309 echo 'correctly with gcc-3.4 and your version of binutils.'; \
310 echo '*** Please upgrade your binutils or downgrade your gcc'; \
311 false; \
312 fi ; \
313 fi
314 @if test "$(call cc-version)" -lt "0400" \
315 && test "x${CONFIG_PPC64}" = "xy" ; then \
316 echo -n "Sorry, GCC v4.0 or above is required to build " ; \
317 echo "the 64-bit powerpc kernel." ; \
318 false ; \
319 fi
320 @if test "$(call cc-fullversion)" = "040200" \
321 && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
322 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
323 echo 'kernel with modules enabled.' ; \
324 echo -n '*** Please use a different GCC version or ' ; \
325 echo 'disable kernel modules' ; \
326 false ; \
327 fi
328
329CLEAN_FILES += $(TOUT)
330