Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
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 := $(call cc-option-yn, -m32)
16
17# Set default 32 bits cross compilers for vdso and boot wrapper
18CROSS32_COMPILE ?=
19
20ifeq ($(HAS_BIARCH),y)
21ifeq ($(CROSS32_COMPILE),)
22ifdef CONFIG_PPC32
23# These options will be overridden by any -mcpu option that the CPU
24# or platform code sets later on the command line, but they are needed
25# to set a sane 32-bit cpu target for the 64-bit cross compiler which
26# may default to the wrong ISA.
27KBUILD_CFLAGS += -mcpu=powerpc
28KBUILD_AFLAGS += -mcpu=powerpc
29endif
30endif
31endif
32
33ifdef CONFIG_PPC_BOOK3S_32
34KBUILD_CFLAGS += -mcpu=powerpc
35endif
36
37# If we're on a ppc/ppc64/ppc64le machine use that defconfig, otherwise just use
38# ppc64_defconfig because we have nothing better to go on.
39uname := $(shell uname -m)
40KBUILD_DEFCONFIG := $(if $(filter ppc%,$(uname)),$(uname),ppc64)_defconfig
41
42new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
43
44ifeq ($(new_nm),y)
45NM := $(NM) --synthetic
46endif
47
48# BITS is used as extension for files which are available in a 32 bit
49# and a 64 bit version to simplify shared Makefiles.
50# e.g.: obj-y += foo_$(BITS).o
51export BITS
52
53ifdef CONFIG_PPC64
54 BITS := 64
55else
56 BITS := 32
57endif
58
59machine-y = ppc
60machine-$(CONFIG_PPC64) += 64
61machine-$(CONFIG_CPU_LITTLE_ENDIAN) += le
62UTS_MACHINE := $(subst $(space),,$(machine-y))
63
64# XXX This needs to be before we override LD below
65ifdef CONFIG_PPC32
66KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
67else
68KBUILD_LDS_MODULE += $(srctree)/arch/powerpc/kernel/module.lds
69ifeq ($(call ld-ifversion, -ge, 225000000, y),y)
70# Have the linker provide sfpr if possible.
71# There is a corresponding test in arch/powerpc/lib/Makefile
72KBUILD_LDFLAGS_MODULE += --save-restore-funcs
73else
74KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
75endif
76endif
77
78ifdef CONFIG_CPU_LITTLE_ENDIAN
79KBUILD_CFLAGS += -mlittle-endian
80KBUILD_LDFLAGS += -EL
81LDEMULATION := lppc
82GNUTARGET := powerpcle
83MULTIPLEWORD := -mno-multiple
84KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect)
85else
86KBUILD_CFLAGS += $(call cc-option,-mbig-endian)
87KBUILD_LDFLAGS += -EB
88LDEMULATION := ppc
89GNUTARGET := powerpc
90MULTIPLEWORD := -mmultiple
91endif
92
93ifdef CONFIG_PPC64
94ifndef CONFIG_CC_IS_CLANG
95cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1)
96cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mcall-aixdesc)
97aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1)
98aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mabi=elfv2
99endif
100endif
101
102ifndef CONFIG_CC_IS_CLANG
103 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align
104endif
105
106cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
107cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
108aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
109aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
110
111ifeq ($(HAS_BIARCH),y)
112KBUILD_CFLAGS += -m$(BITS)
113KBUILD_AFLAGS += -m$(BITS) -Wl,-a$(BITS)
114KBUILD_LDFLAGS += -m elf$(BITS)$(LDEMULATION)
115endif
116
117cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard=tls
118ifdef CONFIG_PPC64
119cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r13
120else
121cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r2
122endif
123
124LDFLAGS_vmlinux-y := -Bstatic
125LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
126LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y)
127LDFLAGS_vmlinux += $(call ld-option,--orphan-handling=warn)
128
129ifdef CONFIG_PPC64
130ifeq ($(call cc-option-yn,-mcmodel=medium),y)
131 # -mcmodel=medium breaks modules because it uses 32bit offsets from
132 # the TOC pointer to create pointers where possible. Pointers into the
133 # percpu data area are created by this method.
134 #
135 # The kernel module loader relocates the percpu data section from the
136 # original location (starting with 0xd...) to somewhere in the base
137 # kernel percpu data space (starting with 0xc...). We need a full
138 # 64bit relocation for this to work, hence -mcmodel=large.
139 KBUILD_CFLAGS_MODULE += -mcmodel=large
140else
141 export NO_MINIMAL_TOC := -mno-minimal-toc
142endif
143endif
144
145CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no)
146ifndef CONFIG_CC_IS_CLANG
147ifdef CONFIG_CPU_LITTLE_ENDIAN
148CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc))
149AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2)
150else
151CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
152CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc)
153AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
154endif
155endif
156CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc))
157CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions)
158
159# Clang unconditionally reserves r2 on ppc32 and does not support the flag
160# https://bugs.llvm.org/show_bug.cgi?id=39555
161CFLAGS-$(CONFIG_PPC32) := $(call cc-option, -ffixed-r2)
162
163# Clang doesn't support -mmultiple / -mno-multiple
164# https://bugs.llvm.org/show_bug.cgi?id=39556
165CFLAGS-$(CONFIG_PPC32) += $(call cc-option, $(MULTIPLEWORD))
166
167CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata)
168
169ifdef CONFIG_PPC_BOOK3S_64
170ifdef CONFIG_CPU_LITTLE_ENDIAN
171CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8
172CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power9,-mtune=power8)
173else
174CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5))
175CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mcpu=power5,-mcpu=power4)
176endif
177else
178CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
179endif
180
181ifdef CONFIG_FUNCTION_TRACER
182CC_FLAGS_FTRACE := -pg
183ifdef CONFIG_MPROFILE_KERNEL
184CC_FLAGS_FTRACE += -mprofile-kernel
185endif
186# Work around gcc code-gen bugs with -pg / -fno-omit-frame-pointer in gcc <= 4.8
187# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44199
188# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52828
189ifndef CONFIG_CC_IS_CLANG
190CC_FLAGS_FTRACE += $(call cc-ifversion, -lt, 0409, -mno-sched-epilog)
191endif
192endif
193
194CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU))
195
196# Altivec option not allowed with e500mc64 in GCC.
197ifdef CONFIG_ALTIVEC
198E5500_CPU := -mcpu=powerpc64
199else
200E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
201endif
202CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU)
203CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
204
205ifdef CONFIG_PPC32
206ifdef CONFIG_PPC_E500MC
207CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc)
208else
209CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc)
210endif
211endif
212
213asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
214
215KBUILD_CPPFLAGS += -I $(srctree)/arch/$(ARCH) $(asinstr)
216KBUILD_AFLAGS += $(AFLAGS-y)
217KBUILD_CFLAGS += $(call cc-option,-msoft-float)
218KBUILD_CFLAGS += -pipe $(CFLAGS-y)
219CPP = $(CC) -E $(KBUILD_CFLAGS)
220
221CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__
222ifdef CONFIG_CPU_BIG_ENDIAN
223CHECKFLAGS += -D__BIG_ENDIAN__
224else
225CHECKFLAGS += -D__LITTLE_ENDIAN__
226endif
227
228ifdef CONFIG_476FPE_ERR46
229 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \
230 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds
231endif
232
233# No AltiVec or VSX instructions when building kernel
234KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
235KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
236
237# No SPE instruction when building kernel
238# (We use all available options to help semi-broken compilers)
239KBUILD_CFLAGS += $(call cc-option,-mno-spe)
240KBUILD_CFLAGS += $(call cc-option,-mspe=no)
241
242# FIXME: the module load should be taught about the additional relocs
243# generated by this.
244# revert to pre-gcc-4.4 behaviour of .eh_frame
245KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
246
247# Never use string load/store instructions as they are
248# often slow when they are implemented at all
249KBUILD_CFLAGS += $(call cc-option,-mno-string)
250
251cpu-as-$(CONFIG_4xx) += -Wa,-m405
252cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec)
253cpu-as-$(CONFIG_E200) += -Wa,-me200
254cpu-as-$(CONFIG_E500) += -Wa,-me500
255
256# When using '-many -mpower4' gas will first try and find a matching power4
257# mnemonic and failing that it will allow any valid mnemonic that GAS knows
258# about. GCC will pass -many to GAS when assembling, clang does not.
259cpu-as-$(CONFIG_PPC_BOOK3S_64) += -Wa,-mpower4 -Wa,-many
260cpu-as-$(CONFIG_PPC_E500MC) += $(call as-option,-Wa$(comma)-me500mc)
261
262KBUILD_AFLAGS += $(cpu-as-y)
263KBUILD_CFLAGS += $(cpu-as-y)
264
265KBUILD_AFLAGS += $(aflags-y)
266KBUILD_CFLAGS += $(cflags-y)
267
268head-y := arch/powerpc/kernel/head_$(BITS).o
269head-$(CONFIG_PPC_8xx) := arch/powerpc/kernel/head_8xx.o
270head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o
271head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o
272head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o
273
274head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o
275head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o
276head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o
277head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o
278
279# See arch/powerpc/Kbuild for content of core part of the kernel
280core-y += arch/powerpc/
281
282drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/
283
284# Default to zImage, override when needed
285all: zImage
286
287# With make 3.82 we cannot mix normal and wildcard targets
288BOOT_TARGETS1 := zImage zImage.initrd uImage
289BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
290
291PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
292
293boot := arch/$(ARCH)/boot
294
295$(BOOT_TARGETS1): vmlinux
296 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
297$(BOOT_TARGETS2): vmlinux
298 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
299
300
301bootwrapper_install:
302 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
303
304# Used to create 'merged defconfigs'
305# To use it $(call) it with the first argument as the base defconfig
306# and the second argument as a space separated list of .config files to merge,
307# without the .config suffix.
308define merge_into_defconfig
309 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
310 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \
311 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config)
312 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
313endef
314
315PHONY += pseries_le_defconfig
316pseries_le_defconfig:
317 $(call merge_into_defconfig,pseries_defconfig,le)
318
319PHONY += ppc64le_defconfig
320ppc64le_defconfig:
321 $(call merge_into_defconfig,ppc64_defconfig,le)
322
323PHONY += ppc64le_guest_defconfig
324ppc64le_guest_defconfig:
325 $(call merge_into_defconfig,ppc64_defconfig,le guest)
326
327PHONY += ppc64_guest_defconfig
328ppc64_guest_defconfig:
329 $(call merge_into_defconfig,ppc64_defconfig,be guest)
330
331PHONY += powernv_be_defconfig
332powernv_be_defconfig:
333 $(call merge_into_defconfig,powernv_defconfig,be)
334
335PHONY += mpc85xx_defconfig
336mpc85xx_defconfig:
337 $(call merge_into_defconfig,mpc85xx_base.config,\
338 85xx-32bit 85xx-hw fsl-emb-nonhw)
339
340PHONY += mpc85xx_smp_defconfig
341mpc85xx_smp_defconfig:
342 $(call merge_into_defconfig,mpc85xx_base.config,\
343 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)
344
345PHONY += corenet32_smp_defconfig
346corenet32_smp_defconfig:
347 $(call merge_into_defconfig,corenet_base.config,\
348 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa)
349
350PHONY += corenet64_smp_defconfig
351corenet64_smp_defconfig:
352 $(call merge_into_defconfig,corenet_base.config,\
353 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa)
354
355PHONY += mpc86xx_defconfig
356mpc86xx_defconfig:
357 $(call merge_into_defconfig,mpc86xx_base.config,\
358 86xx-hw fsl-emb-nonhw)
359
360PHONY += mpc86xx_smp_defconfig
361mpc86xx_smp_defconfig:
362 $(call merge_into_defconfig,mpc86xx_base.config,\
363 86xx-smp 86xx-hw fsl-emb-nonhw)
364
365PHONY += ppc32_allmodconfig
366ppc32_allmodconfig:
367 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \
368 -f $(srctree)/Makefile allmodconfig
369
370PHONY += ppc_defconfig
371ppc_defconfig:
372 $(call merge_into_defconfig,book3s_32.config,)
373
374PHONY += ppc64le_allmodconfig
375ppc64le_allmodconfig:
376 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \
377 -f $(srctree)/Makefile allmodconfig
378
379PHONY += ppc64_book3e_allmodconfig
380ppc64_book3e_allmodconfig:
381 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \
382 -f $(srctree)/Makefile allmodconfig
383
384define archhelp
385 @echo '* zImage - Build default images selected by kernel config'
386 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
387 @echo ' uImage - U-Boot native image format'
388 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older'
389 @echo ' versions which do not support device trees'
390 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob'
391 @echo ' simpleImage.<dt> - Firmware independent image.'
392 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)'
393 @echo ' install - Install kernel using'
394 @echo ' (your) ~/bin/$(INSTALLKERNEL) or'
395 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
396 @echo ' install to $$(INSTALL_PATH) and run lilo'
397 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs'
398 @echo ''
399 @echo ' Targets with <dt> embed a device tree blob inside the image'
400 @echo ' These targets support board with firmware that does not'
401 @echo ' support passing a device tree directly. Replace <dt> with the'
402 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
403 @echo ' (minus the .dts extension).'
404endef
405
406install:
407 $(Q)$(MAKE) $(build)=$(boot) install
408
409vdso_install:
410ifdef CONFIG_PPC64
411 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
412endif
413ifdef CONFIG_VDSO32
414 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
415endif
416
417archclean:
418 $(Q)$(MAKE) $(clean)=$(boot)
419
420archprepare: checkbin
421
422archheaders:
423 $(Q)$(MAKE) $(build)=arch/powerpc/kernel/syscalls all
424
425ifdef CONFIG_STACKPROTECTOR
426prepare: stack_protector_prepare
427
428stack_protector_prepare: prepare0
429ifdef CONFIG_PPC64
430 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' include/generated/asm-offsets.h))
431else
432 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' include/generated/asm-offsets.h))
433endif
434endif
435
436ifdef CONFIG_SMP
437prepare: task_cpu_prepare
438
439task_cpu_prepare: prepare0
440 $(eval KBUILD_CFLAGS += -D_TASK_CPU=$(shell awk '{if ($$2 == "TASK_CPU") print $$3;}' include/generated/asm-offsets.h))
441endif
442
443# Check toolchain versions:
444# - gcc-4.6 is the minimum kernel-wide version so nothing required.
445checkbin:
446 @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \
447 && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \
448 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \
449 echo 'in some circumstances.' ; \
450 echo -n '*** Please use a different binutils version.' ; \
451 false ; \
452 fi