xref: /openbmc/linux/arch/mips/Makefile (revision 3d3337de)
1#
2# This file is subject to the terms and conditions of the GNU General Public
3# License.  See the file "COPYING" in the main directory of this archive
4# for more details.
5#
6# Copyright (C) 1994, 95, 96, 2003 by Ralf Baechle
7# DECStation modifications by Paul M. Antoine, 1996
8# Copyright (C) 2002, 2003, 2004  Maciej W. Rozycki
9#
10# This file is included by the global makefile so that you can add your own
11# architecture-specific flags and dependencies. Remember to do have actions
12# for "archclean" cleaning up for this architecture.
13#
14
15KBUILD_DEFCONFIG := ip22_defconfig
16
17#
18# Select the object file format to substitute into the linker script.
19#
20ifdef CONFIG_CPU_LITTLE_ENDIAN
2132bit-tool-archpref	= mipsel
2264bit-tool-archpref	= mips64el
2332bit-bfd		= elf32-tradlittlemips
2464bit-bfd		= elf64-tradlittlemips
2532bit-emul		= elf32ltsmip
2664bit-emul		= elf64ltsmip
27else
2832bit-tool-archpref	= mips
2964bit-tool-archpref	= mips64
3032bit-bfd		= elf32-tradbigmips
3164bit-bfd		= elf64-tradbigmips
3232bit-emul		= elf32btsmip
3364bit-emul		= elf64btsmip
34endif
35
36ifdef CONFIG_32BIT
37tool-archpref		= $(32bit-tool-archpref)
38UTS_MACHINE		:= mips
39endif
40ifdef CONFIG_64BIT
41tool-archpref		= $(64bit-tool-archpref)
42UTS_MACHINE		:= mips64
43endif
44
45ifneq ($(SUBARCH),$(ARCH))
46  ifeq ($(CROSS_COMPILE),)
47    CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux-  $(tool-archpref)-linux-gnu-  $(tool-archpref)-unknown-linux-gnu-)
48  endif
49endif
50
51ifdef CONFIG_FUNCTION_GRAPH_TRACER
52  ifndef KBUILD_MCOUNT_RA_ADDRESS
53    ifeq ($(call cc-option-yn,-mmcount-ra-address), y)
54      cflags-y += -mmcount-ra-address -DKBUILD_MCOUNT_RA_ADDRESS
55    endif
56  endif
57endif
58cflags-y += $(call cc-option, -mno-check-zero-division)
59
60ifdef CONFIG_32BIT
61ld-emul			= $(32bit-emul)
62vmlinux-32		= vmlinux
63vmlinux-64		= vmlinux.64
64
65cflags-y		+= -mabi=32
66endif
67
68ifdef CONFIG_64BIT
69ld-emul			= $(64bit-emul)
70vmlinux-32		= vmlinux.32
71vmlinux-64		= vmlinux
72
73cflags-y		+= -mabi=64
74endif
75
76all-$(CONFIG_BOOT_ELF32)	:= $(vmlinux-32)
77all-$(CONFIG_BOOT_ELF64)	:= $(vmlinux-64)
78all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlinuz
79
80#
81# GCC uses -G 0 -mabicalls -fpic as default.  We don't want PIC in the kernel
82# code since it only slows down the whole thing.  At some point we might make
83# use of global pointer optimizations but their use of $28 conflicts with
84# the current pointer optimization.
85#
86# The DECStation requires an ECOFF kernel for remote booting, other MIPS
87# machines may also.  Since BFD is incredibly buggy with respect to
88# crossformat linking we rely on the elf2ecoff tool for format conversion.
89#
90cflags-y			+= -G 0 -mno-abicalls -fno-pic -pipe
91cflags-y			+= -msoft-float
92LDFLAGS_vmlinux			+= -G 0 -static -n -nostdlib
93KBUILD_AFLAGS_MODULE		+= -mlong-calls
94KBUILD_CFLAGS_MODULE		+= -mlong-calls
95
96#
97# pass -msoft-float to GAS if it supports it.  However on newer binutils
98# (specifically newer than 2.24.51.20140728) we then also need to explicitly
99# set ".set hardfloat" in all files which manipulate floating point registers.
100#
101ifneq ($(call as-option,-Wa$(comma)-msoft-float,),)
102	cflags-y		+= -DGAS_HAS_SET_HARDFLOAT -Wa,-msoft-float
103endif
104
105cflags-y += -ffreestanding
106
107#
108# We explicitly add the endianness specifier if needed, this allows
109# to compile kernels with a toolchain for the other endianness. We
110# carefully avoid to add it redundantly because gcc 3.3/3.4 complains
111# when fed the toolchain default!
112#
113# Certain gcc versions up to gcc 4.1.1 (probably 4.2-subversion as of
114# 2006-10-10 don't properly change the predefined symbols if -EB / -EL
115# are used, so we kludge that here.  A bug has been filed at
116# http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29413.
117#
118undef-all += -UMIPSEB -U_MIPSEB -U__MIPSEB -U__MIPSEB__
119undef-all += -UMIPSEL -U_MIPSEL -U__MIPSEL -U__MIPSEL__
120predef-be += -DMIPSEB -D_MIPSEB -D__MIPSEB -D__MIPSEB__
121predef-le += -DMIPSEL -D_MIPSEL -D__MIPSEL -D__MIPSEL__
122cflags-$(CONFIG_CPU_BIG_ENDIAN)		+= $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' && echo -EB $(undef-all) $(predef-be))
123cflags-$(CONFIG_CPU_LITTLE_ENDIAN)	+= $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' || echo -EL $(undef-all) $(predef-le))
124
125cflags-$(CONFIG_SB1XXX_CORELIS)	+= $(call cc-option,-mno-sched-prolog) \
126				   -fno-omit-frame-pointer
127#
128# CPU-dependent compiler/assembler options for optimization.
129#
130cflags-$(CONFIG_CPU_R3000)	+= -march=r3000
131cflags-$(CONFIG_CPU_TX39XX)	+= -march=r3900
132cflags-$(CONFIG_CPU_R6000)	+= -march=r6000 -Wa,--trap
133cflags-$(CONFIG_CPU_R4300)	+= -march=r4300 -Wa,--trap
134cflags-$(CONFIG_CPU_VR41XX)	+= -march=r4100 -Wa,--trap
135cflags-$(CONFIG_CPU_R4X00)	+= -march=r4600 -Wa,--trap
136cflags-$(CONFIG_CPU_TX49XX)	+= -march=r4600 -Wa,--trap
137cflags-$(CONFIG_CPU_MIPS32_R1)	+= $(call cc-option,-march=mips32,-mips32 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
138			-Wa,-mips32 -Wa,--trap
139cflags-$(CONFIG_CPU_MIPS32_R2)	+= $(call cc-option,-march=mips32r2,-mips32r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
140			-Wa,-mips32r2 -Wa,--trap
141cflags-$(CONFIG_CPU_MIPS32_R6)	+= -march=mips32r6 -Wa,--trap
142cflags-$(CONFIG_CPU_MIPS64_R1)	+= $(call cc-option,-march=mips64,-mips64 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
143			-Wa,-mips64 -Wa,--trap
144cflags-$(CONFIG_CPU_MIPS64_R2)	+= $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
145			-Wa,-mips64r2 -Wa,--trap
146cflags-$(CONFIG_CPU_MIPS64_R6)	+= -march=mips64r6 -Wa,--trap
147cflags-$(CONFIG_CPU_R5000)	+= -march=r5000 -Wa,--trap
148cflags-$(CONFIG_CPU_R5432)	+= $(call cc-option,-march=r5400,-march=r5000) \
149			-Wa,--trap
150cflags-$(CONFIG_CPU_R5500)	+= $(call cc-option,-march=r5500,-march=r5000) \
151			-Wa,--trap
152cflags-$(CONFIG_CPU_NEVADA)	+= $(call cc-option,-march=rm5200,-march=r5000) \
153			-Wa,--trap
154cflags-$(CONFIG_CPU_RM7000)	+= $(call cc-option,-march=rm7000,-march=r5000) \
155			-Wa,--trap
156cflags-$(CONFIG_CPU_SB1)	+= $(call cc-option,-march=sb1,-march=r5000) \
157			-Wa,--trap
158cflags-$(CONFIG_CPU_SB1)	+= $(call cc-option,-mno-mdmx)
159cflags-$(CONFIG_CPU_SB1)	+= $(call cc-option,-mno-mips3d)
160cflags-$(CONFIG_CPU_R8000)	+= -march=r8000 -Wa,--trap
161cflags-$(CONFIG_CPU_R10000)	+= $(call cc-option,-march=r10000,-march=r8000) \
162			-Wa,--trap
163cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += $(call cc-option,-march=octeon) -Wa,--trap
164ifeq (,$(findstring march=octeon, $(cflags-$(CONFIG_CPU_CAVIUM_OCTEON))))
165cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -Wa,-march=octeon
166endif
167cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1
168cflags-$(CONFIG_CPU_BMIPS)	+= -march=mips32 -Wa,-mips32 -Wa,--trap
169#
170# binutils from v2.25 on and gcc starting from v4.9.0 treat -march=loongson3a
171# as MIPS64 R1; older versions as just R1.  This leaves the possibility open
172# that GCC might generate R2 code for -march=loongson3a which then is rejected
173# by GAS.  The cc-option can't probe for this behaviour so -march=loongson3a
174# can't easily be used safely within the kbuild framework.
175#
176cflags-$(CONFIG_CPU_LOONGSON3)  +=					\
177	$(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
178	-Wa,-mips64r2 -Wa,--trap
179
180cflags-$(CONFIG_CPU_R4000_WORKAROUNDS)	+= $(call cc-option,-mfix-r4000,)
181cflags-$(CONFIG_CPU_R4400_WORKAROUNDS)	+= $(call cc-option,-mfix-r4400,)
182cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS)	+= $(call cc-option,-mno-daddi,)
183
184ifdef CONFIG_CPU_SB1
185ifdef CONFIG_SB1_PASS_1_WORKAROUNDS
186KBUILD_AFLAGS_MODULE += -msb1-pass1-workarounds
187KBUILD_CFLAGS_MODULE += -msb1-pass1-workarounds
188endif
189endif
190
191# For smartmips configurations, there are hundreds of warnings due to ISA overrides
192# in assembly and header files. smartmips is only supported for MIPS32r1 onwards
193# and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or
194# similar directives in the kernel will spam the build logs with the following warnings:
195# Warning: the `smartmips' extension requires MIPS32 revision 1 or greater
196# or
197# Warning: the 64-bit MIPS architecture does not support the `smartmips' extension
198# Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has
199# been fixed properly.
200mips-cflags				:= $(cflags-y)
201ifeq ($(CONFIG_CPU_HAS_SMARTMIPS),y)
202smartmips-ase				:= $(call cc-option-yn,$(mips-cflags) -msmartmips)
203cflags-$(smartmips-ase)			+= -msmartmips -Wa,--no-warn
204endif
205ifeq ($(CONFIG_CPU_MICROMIPS),y)
206micromips-ase				:= $(call cc-option-yn,$(mips-cflags) -mmicromips)
207cflags-$(micromips-ase)			+= -mmicromips
208endif
209ifeq ($(CONFIG_CPU_HAS_MSA),y)
210toolchain-msa				:= $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa)
211cflags-$(toolchain-msa)			+= -DTOOLCHAIN_SUPPORTS_MSA
212endif
213
214#
215# Firmware support
216#
217libs-$(CONFIG_FW_ARC)		+= arch/mips/fw/arc/
218libs-$(CONFIG_FW_CFE)		+= arch/mips/fw/cfe/
219libs-$(CONFIG_FW_SNIPROM)	+= arch/mips/fw/sni/
220libs-y				+= arch/mips/fw/lib/
221
222#
223# Kernel compression
224#
225ifdef SYS_SUPPORTS_ZBOOT
226COMPRESSION_FNAME		= vmlinuz
227else
228COMPRESSION_FNAME		= vmlinux
229endif
230
231#
232# Board-dependent options and extra files
233#
234include arch/mips/Kbuild.platforms
235
236ifdef CONFIG_PHYSICAL_START
237load-y					= $(CONFIG_PHYSICAL_START)
238endif
239entry-y				= 0x$(shell $(NM) vmlinux 2>/dev/null \
240					| grep "\bkernel_entry\b" | cut -f1 -d \ )
241
242cflags-y			+= -I$(srctree)/arch/mips/include/asm/mach-generic
243drivers-$(CONFIG_PCI)		+= arch/mips/pci/
244
245#
246# Automatically detect the build format. By default we choose
247# the elf format according to the load address.
248# We can always force a build with a 64-bits symbol format by
249# passing 'KBUILD_SYM32=no' option to the make's command line.
250#
251ifdef CONFIG_64BIT
252  ifndef KBUILD_SYM32
253    ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0)
254      KBUILD_SYM32 = y
255    endif
256  endif
257
258  ifeq ($(KBUILD_SYM32)$(call cc-option-yn,-msym32), yy)
259    cflags-y += -msym32 -DKBUILD_64BIT_SYM32
260  else
261    ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
262      $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
263    endif
264  endif
265endif
266
267KBUILD_AFLAGS	+= $(cflags-y)
268KBUILD_CFLAGS	+= $(cflags-y)
269KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y)
270KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
271
272bootvars-y	= VMLINUX_LOAD_ADDRESS=$(load-y) \
273		  VMLINUX_ENTRY_ADDRESS=$(entry-y)
274
275LDFLAGS			+= -m $(ld-emul)
276
277ifdef CONFIG_MIPS
278CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
279	egrep -vw '__GNUC_(|MINOR_|PATCHLEVEL_)_' | \
280	sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/")
281ifdef CONFIG_64BIT
282CHECKFLAGS		+= -m64
283endif
284endif
285
286OBJCOPYFLAGS		+= --remove-section=.reginfo
287
288head-y := arch/mips/kernel/head.o
289
290libs-y			+= arch/mips/lib/
291libs-y			+= arch/mips/math-emu/
292
293# See arch/mips/Kbuild for content of core part of the kernel
294core-y += arch/mips/
295
296drivers-$(CONFIG_OPROFILE)	+= arch/mips/oprofile/
297
298# suspend and hibernation support
299drivers-$(CONFIG_PM)	+= arch/mips/power/
300
301# boot image targets (arch/mips/boot/)
302boot-y			:= vmlinux.bin
303boot-y			+= vmlinux.ecoff
304boot-y			+= vmlinux.srec
305ifeq ($(shell expr $(load-y) \< 0xffffffff80000000 2> /dev/null), 0)
306boot-y			+= uImage
307boot-y			+= uImage.bin
308boot-y			+= uImage.bz2
309boot-y			+= uImage.gz
310boot-y			+= uImage.lzma
311boot-y			+= uImage.lzo
312endif
313
314# compressed boot image targets (arch/mips/boot/compressed/)
315bootz-y			:= vmlinuz
316bootz-y			+= vmlinuz.bin
317bootz-y			+= vmlinuz.ecoff
318bootz-y			+= vmlinuz.srec
319
320ifdef CONFIG_LASAT
321rom.bin rom.sw: vmlinux
322	$(Q)$(MAKE) $(build)=arch/mips/lasat/image \
323		$(bootvars-y) $@
324endif
325
326#
327# Some machines like the Indy need 32-bit ELF binaries for booting purposes.
328# Other need ECOFF, so we build a 32-bit ELF binary for them which we then
329# convert to ECOFF using elf2ecoff.
330#
331quiet_cmd_32 = OBJCOPY $@
332	cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
333vmlinux.32: vmlinux
334	$(call cmd,32)
335
336#
337# The 64-bit ELF tools are pretty broken so at this time we generate 64-bit
338# ELF files from 32-bit files by conversion.
339#
340quiet_cmd_64 = OBJCOPY $@
341	cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@
342vmlinux.64: vmlinux
343	$(call cmd,64)
344
345all:	$(all-y)
346
347# boot
348$(boot-y): $(vmlinux-32) FORCE
349	$(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \
350		$(bootvars-y) arch/mips/boot/$@
351
352ifdef CONFIG_SYS_SUPPORTS_ZBOOT
353# boot/compressed
354$(bootz-y): $(vmlinux-32) FORCE
355	$(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
356		$(bootvars-y) 32bit-bfd=$(32bit-bfd) $@
357else
358vmlinuz: FORCE
359	@echo '   CONFIG_SYS_SUPPORTS_ZBOOT is not enabled'
360	/bin/false
361endif
362
363
364CLEAN_FILES += vmlinux.32 vmlinux.64
365
366# device-trees
367core-$(CONFIG_BUILTIN_DTB) += arch/mips/boot/dts/
368
369%.dtb %.dtb.S %.dtb.o: | scripts
370	$(Q)$(MAKE) $(build)=arch/mips/boot/dts arch/mips/boot/dts/$@
371
372PHONY += dtbs
373dtbs: scripts
374	$(Q)$(MAKE) $(build)=arch/mips/boot/dts
375
376PHONY += dtbs_install
377dtbs_install:
378	$(Q)$(MAKE) $(dtbinst)=arch/mips/boot/dts
379
380archprepare:
381ifdef CONFIG_MIPS32_N32
382	@echo '  Checking missing-syscalls for N32'
383	$(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32"
384endif
385ifdef CONFIG_MIPS32_O32
386	@echo '  Checking missing-syscalls for O32'
387	$(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32"
388endif
389
390install:
391	$(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
392ifdef CONFIG_SYS_SUPPORTS_ZBOOT
393	$(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
394endif
395	$(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
396	$(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
397
398archclean:
399	$(Q)$(MAKE) $(clean)=arch/mips/boot
400	$(Q)$(MAKE) $(clean)=arch/mips/boot/compressed
401	$(Q)$(MAKE) $(clean)=arch/mips/lasat
402
403define archhelp
404	echo '  install              - install kernel into $(INSTALL_PATH)'
405	echo '  vmlinux.ecoff        - ECOFF boot image'
406	echo '  vmlinux.bin          - Raw binary boot image'
407	echo '  vmlinux.srec         - SREC boot image'
408	echo '  vmlinux.32           - 64-bit boot image wrapped in 32bits (IP22/IP32)'
409	echo '  vmlinuz              - Compressed boot(zboot) image'
410	echo '  vmlinuz.ecoff        - ECOFF zboot image'
411	echo '  vmlinuz.bin          - Raw binary zboot image'
412	echo '  vmlinuz.srec         - SREC zboot image'
413	echo '  uImage               - U-Boot image'
414	echo '  uImage.bin           - U-Boot image (uncompressed)'
415	echo '  uImage.bz2           - U-Boot image (bz2)'
416	echo '  uImage.gz            - U-Boot image (gzip)'
417	echo '  uImage.lzma          - U-Boot image (lzma)'
418	echo '  uImage.lzo           - U-Boot image (lzo)'
419	echo '  dtbs                 - Device-tree blobs for enabled boards'
420	echo '  dtbs_install         - Install dtbs to $(INSTALL_DTBS_PATH)'
421	echo
422	echo '  These will be default as appropriate for a configured platform.'
423endef
424