xref: /openbmc/linux/arch/mips/Makefile (revision ba61bb17)
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
15archscripts: scripts_basic
16	$(Q)$(MAKE) $(build)=arch/mips/boot/tools relocs
17
18KBUILD_DEFCONFIG := 32r2el_defconfig
19
20#
21# Select the object file format to substitute into the linker script.
22#
23ifdef CONFIG_CPU_LITTLE_ENDIAN
2432bit-tool-archpref	= mipsel
2564bit-tool-archpref	= mips64el
2632bit-bfd		= elf32-tradlittlemips
2764bit-bfd		= elf64-tradlittlemips
2832bit-emul		= elf32ltsmip
2964bit-emul		= elf64ltsmip
30else
3132bit-tool-archpref	= mips
3264bit-tool-archpref	= mips64
3332bit-bfd		= elf32-tradbigmips
3464bit-bfd		= elf64-tradbigmips
3532bit-emul		= elf32btsmip
3664bit-emul		= elf64btsmip
37endif
38
39ifdef CONFIG_32BIT
40tool-archpref		= $(32bit-tool-archpref)
41UTS_MACHINE		:= mips
42endif
43ifdef CONFIG_64BIT
44tool-archpref		= $(64bit-tool-archpref)
45UTS_MACHINE		:= mips64
46endif
47
48ifneq ($(SUBARCH),$(ARCH))
49  ifeq ($(CROSS_COMPILE),)
50    CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux-  $(tool-archpref)-linux-gnu-  $(tool-archpref)-unknown-linux-gnu-)
51  endif
52endif
53
54ifdef CONFIG_FUNCTION_GRAPH_TRACER
55  ifndef KBUILD_MCOUNT_RA_ADDRESS
56    ifeq ($(call cc-option-yn,-mmcount-ra-address), y)
57      cflags-y += -mmcount-ra-address -DKBUILD_MCOUNT_RA_ADDRESS
58    endif
59  endif
60endif
61cflags-y += $(call cc-option, -mno-check-zero-division)
62
63ifdef CONFIG_32BIT
64ld-emul			= $(32bit-emul)
65vmlinux-32		= vmlinux
66vmlinux-64		= vmlinux.64
67
68cflags-y		+= -mabi=32
69endif
70
71ifdef CONFIG_64BIT
72ld-emul			= $(64bit-emul)
73vmlinux-32		= vmlinux.32
74vmlinux-64		= vmlinux
75
76cflags-y		+= -mabi=64
77endif
78
79all-$(CONFIG_BOOT_ELF32)	:= $(vmlinux-32)
80all-$(CONFIG_BOOT_ELF64)	:= $(vmlinux-64)
81all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlinuz
82
83#
84# GCC uses -G 0 -mabicalls -fpic as default.  We don't want PIC in the kernel
85# code since it only slows down the whole thing.  At some point we might make
86# use of global pointer optimizations but their use of $28 conflicts with
87# the current pointer optimization.
88#
89# The DECStation requires an ECOFF kernel for remote booting, other MIPS
90# machines may also.  Since BFD is incredibly buggy with respect to
91# crossformat linking we rely on the elf2ecoff tool for format conversion.
92#
93cflags-y			+= -G 0 -mno-abicalls -fno-pic -pipe
94cflags-y			+= -msoft-float
95LDFLAGS_vmlinux			+= -G 0 -static -n -nostdlib
96KBUILD_AFLAGS_MODULE		+= -mlong-calls
97KBUILD_CFLAGS_MODULE		+= -mlong-calls
98
99ifeq ($(CONFIG_RELOCATABLE),y)
100LDFLAGS_vmlinux			+= --emit-relocs
101endif
102
103#
104# pass -msoft-float to GAS if it supports it.  However on newer binutils
105# (specifically newer than 2.24.51.20140728) we then also need to explicitly
106# set ".set hardfloat" in all files which manipulate floating point registers.
107#
108ifneq ($(call as-option,-Wa$(comma)-msoft-float,),)
109	cflags-y		+= -DGAS_HAS_SET_HARDFLOAT -Wa,-msoft-float
110endif
111
112cflags-y += -ffreestanding
113
114#
115# We explicitly add the endianness specifier if needed, this allows
116# to compile kernels with a toolchain for the other endianness. We
117# carefully avoid to add it redundantly because gcc 3.3/3.4 complains
118# when fed the toolchain default!
119#
120# Certain gcc versions up to gcc 4.1.1 (probably 4.2-subversion as of
121# 2006-10-10 don't properly change the predefined symbols if -EB / -EL
122# are used, so we kludge that here.  A bug has been filed at
123# http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29413.
124#
125undef-all += -UMIPSEB -U_MIPSEB -U__MIPSEB -U__MIPSEB__
126undef-all += -UMIPSEL -U_MIPSEL -U__MIPSEL -U__MIPSEL__
127predef-be += -DMIPSEB -D_MIPSEB -D__MIPSEB -D__MIPSEB__
128predef-le += -DMIPSEL -D_MIPSEL -D__MIPSEL -D__MIPSEL__
129cflags-$(CONFIG_CPU_BIG_ENDIAN)		+= $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' && echo -EB $(undef-all) $(predef-be))
130cflags-$(CONFIG_CPU_LITTLE_ENDIAN)	+= $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' || echo -EL $(undef-all) $(predef-le))
131
132cflags-$(CONFIG_SB1XXX_CORELIS)	+= $(call cc-option,-mno-sched-prolog) \
133				   -fno-omit-frame-pointer
134
135# Some distribution-specific toolchains might pass the -fstack-check
136# option during the build, which adds a simple stack-probe at the beginning
137# of every function.  This stack probe is to ensure that there is enough
138# stack space, else a SEGV is generated.  This is not desirable for MIPS
139# as kernel stacks are small, placed in unmapped virtual memory, and do not
140# grow when overflowed.  Especially on SGI IP27 platforms, this check will
141# lead to a NULL pointer dereference in _raw_spin_lock_irq.
142#
143# In disassembly, this stack probe appears at the top of a function as:
144#    sd		zero,<offset>(sp)
145# Where <offset> is a negative value.
146#
147cflags-y += -fno-stack-check
148
149#
150# CPU-dependent compiler/assembler options for optimization.
151#
152cflags-$(CONFIG_CPU_R3000)	+= -march=r3000
153cflags-$(CONFIG_CPU_TX39XX)	+= -march=r3900
154cflags-$(CONFIG_CPU_R4300)	+= -march=r4300 -Wa,--trap
155cflags-$(CONFIG_CPU_VR41XX)	+= -march=r4100 -Wa,--trap
156cflags-$(CONFIG_CPU_R4X00)	+= -march=r4600 -Wa,--trap
157cflags-$(CONFIG_CPU_TX49XX)	+= -march=r4600 -Wa,--trap
158cflags-$(CONFIG_CPU_MIPS32_R1)	+= $(call cc-option,-march=mips32,-mips32 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
159			-Wa,-mips32 -Wa,--trap
160cflags-$(CONFIG_CPU_MIPS32_R2)	+= $(call cc-option,-march=mips32r2,-mips32r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
161			-Wa,-mips32r2 -Wa,--trap
162cflags-$(CONFIG_CPU_MIPS32_R6)	+= -march=mips32r6 -Wa,--trap -modd-spreg
163cflags-$(CONFIG_CPU_MIPS64_R1)	+= $(call cc-option,-march=mips64,-mips64 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
164			-Wa,-mips64 -Wa,--trap
165cflags-$(CONFIG_CPU_MIPS64_R2)	+= $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
166			-Wa,-mips64r2 -Wa,--trap
167cflags-$(CONFIG_CPU_MIPS64_R6)	+= -march=mips64r6 -Wa,--trap
168cflags-$(CONFIG_CPU_R5000)	+= -march=r5000 -Wa,--trap
169cflags-$(CONFIG_CPU_R5432)	+= $(call cc-option,-march=r5400,-march=r5000) \
170			-Wa,--trap
171cflags-$(CONFIG_CPU_R5500)	+= $(call cc-option,-march=r5500,-march=r5000) \
172			-Wa,--trap
173cflags-$(CONFIG_CPU_NEVADA)	+= $(call cc-option,-march=rm5200,-march=r5000) \
174			-Wa,--trap
175cflags-$(CONFIG_CPU_RM7000)	+= $(call cc-option,-march=rm7000,-march=r5000) \
176			-Wa,--trap
177cflags-$(CONFIG_CPU_SB1)	+= $(call cc-option,-march=sb1,-march=r5000) \
178			-Wa,--trap
179cflags-$(CONFIG_CPU_SB1)	+= $(call cc-option,-mno-mdmx)
180cflags-$(CONFIG_CPU_SB1)	+= $(call cc-option,-mno-mips3d)
181cflags-$(CONFIG_CPU_R8000)	+= -march=r8000 -Wa,--trap
182cflags-$(CONFIG_CPU_R10000)	+= $(call cc-option,-march=r10000,-march=r8000) \
183			-Wa,--trap
184cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += $(call cc-option,-march=octeon) -Wa,--trap
185ifeq (,$(findstring march=octeon, $(cflags-$(CONFIG_CPU_CAVIUM_OCTEON))))
186cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -Wa,-march=octeon
187endif
188cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1
189cflags-$(CONFIG_CPU_BMIPS)	+= -march=mips32 -Wa,-mips32 -Wa,--trap
190
191cflags-$(CONFIG_CPU_R4000_WORKAROUNDS)	+= $(call cc-option,-mfix-r4000,)
192cflags-$(CONFIG_CPU_R4400_WORKAROUNDS)	+= $(call cc-option,-mfix-r4400,)
193cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS)	+= $(call cc-option,-mno-daddi,)
194
195# For smartmips configurations, there are hundreds of warnings due to ISA overrides
196# in assembly and header files. smartmips is only supported for MIPS32r1 onwards
197# and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or
198# similar directives in the kernel will spam the build logs with the following warnings:
199# Warning: the `smartmips' extension requires MIPS32 revision 1 or greater
200# or
201# Warning: the 64-bit MIPS architecture does not support the `smartmips' extension
202# Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has
203# been fixed properly.
204mips-cflags				:= $(cflags-y)
205ifeq ($(CONFIG_CPU_HAS_SMARTMIPS),y)
206smartmips-ase				:= $(call cc-option-yn,$(mips-cflags) -msmartmips)
207cflags-$(smartmips-ase)			+= -msmartmips -Wa,--no-warn
208endif
209ifeq ($(CONFIG_CPU_MICROMIPS),y)
210micromips-ase				:= $(call cc-option-yn,$(mips-cflags) -mmicromips)
211cflags-$(micromips-ase)			+= -mmicromips
212endif
213ifeq ($(CONFIG_CPU_HAS_MSA),y)
214toolchain-msa				:= $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa)
215cflags-$(toolchain-msa)			+= -DTOOLCHAIN_SUPPORTS_MSA
216endif
217toolchain-virt				:= $(call cc-option-yn,$(mips-cflags) -mvirt)
218cflags-$(toolchain-virt)		+= -DTOOLCHAIN_SUPPORTS_VIRT
219# For -mmicromips, use -Wa,-fatal-warnings to catch unsupported -mxpa which
220# only warns
221xpa-cflags-y				:= $(mips-cflags)
222xpa-cflags-$(micromips-ase)		+= -mmicromips -Wa$(comma)-fatal-warnings
223toolchain-xpa				:= $(call cc-option-yn,$(xpa-cflags-y) -mxpa)
224cflags-$(toolchain-xpa)			+= -DTOOLCHAIN_SUPPORTS_XPA
225toolchain-crc				:= $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mcrc)
226cflags-$(toolchain-crc)			+= -DTOOLCHAIN_SUPPORTS_CRC
227
228#
229# Firmware support
230#
231libs-$(CONFIG_FW_ARC)		+= arch/mips/fw/arc/
232libs-$(CONFIG_FW_CFE)		+= arch/mips/fw/cfe/
233libs-$(CONFIG_FW_SNIPROM)	+= arch/mips/fw/sni/
234libs-y				+= arch/mips/fw/lib/
235
236#
237# Kernel compression
238#
239ifdef CONFIG_SYS_SUPPORTS_ZBOOT
240COMPRESSION_FNAME		= vmlinuz
241else
242COMPRESSION_FNAME		= vmlinux
243endif
244
245#
246# Board-dependent options and extra files
247#
248include arch/mips/Kbuild.platforms
249
250ifdef CONFIG_PHYSICAL_START
251load-y					= $(CONFIG_PHYSICAL_START)
252endif
253
254# Sign-extend the entry point to 64 bits if retrieved as a 32-bit number.
255entry-y		= $(shell $(OBJDUMP) -f vmlinux 2>/dev/null \
256			| sed -n '/^start address / { \
257				s/^.* //; \
258				s/0x\([0-7].......\)$$/0x00000000\1/; \
259				s/0x\(........\)$$/0xffffffff\1/; p }')
260
261cflags-y			+= -I$(srctree)/arch/mips/include/asm/mach-generic
262drivers-$(CONFIG_PCI)		+= arch/mips/pci/
263
264#
265# Automatically detect the build format. By default we choose
266# the elf format according to the load address.
267# We can always force a build with a 64-bits symbol format by
268# passing 'KBUILD_SYM32=no' option to the make's command line.
269#
270ifdef CONFIG_64BIT
271  ifndef KBUILD_SYM32
272    ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0)
273      KBUILD_SYM32 = y
274    endif
275  endif
276
277  ifeq ($(KBUILD_SYM32)$(call cc-option-yn,-msym32), yy)
278    cflags-y += -msym32 -DKBUILD_64BIT_SYM32
279  else
280    ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
281      $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
282    endif
283  endif
284endif
285
286KBUILD_AFLAGS	+= $(cflags-y)
287KBUILD_CFLAGS	+= $(cflags-y)
288KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y)
289KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
290
291bootvars-y	= VMLINUX_LOAD_ADDRESS=$(load-y) \
292		  VMLINUX_ENTRY_ADDRESS=$(entry-y) \
293		  PLATFORM="$(platform-y)" \
294		  ITS_INPUTS="$(its-y)"
295ifdef CONFIG_32BIT
296bootvars-y	+= ADDR_BITS=32
297endif
298ifdef CONFIG_64BIT
299bootvars-y	+= ADDR_BITS=64
300endif
301
302# This is required to get dwarf unwinding tables into .debug_frame
303# instead of .eh_frame so we don't discard them.
304KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
305
306LDFLAGS			+= -m $(ld-emul)
307
308ifdef CONFIG_MIPS
309CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
310	egrep -vw '__GNUC_(|MINOR_|PATCHLEVEL_)_' | \
311	sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
312endif
313
314OBJCOPYFLAGS		+= --remove-section=.reginfo
315
316head-y := arch/mips/kernel/head.o
317
318libs-y			+= arch/mips/lib/
319libs-y			+= arch/mips/math-emu/
320
321# See arch/mips/Kbuild for content of core part of the kernel
322core-y += arch/mips/
323
324drivers-$(CONFIG_MIPS_CRC_SUPPORT) += arch/mips/crypto/
325drivers-$(CONFIG_OPROFILE)	+= arch/mips/oprofile/
326
327# suspend and hibernation support
328drivers-$(CONFIG_PM)	+= arch/mips/power/
329
330# boot image targets (arch/mips/boot/)
331boot-y			:= vmlinux.bin
332boot-y			+= vmlinux.ecoff
333boot-y			+= vmlinux.srec
334ifeq ($(shell expr $(load-y) \< 0xffffffff80000000 2> /dev/null), 0)
335boot-y			+= uImage
336boot-y			+= uImage.bin
337boot-y			+= uImage.bz2
338boot-y			+= uImage.gz
339boot-y			+= uImage.lzma
340boot-y			+= uImage.lzo
341endif
342boot-y			+= vmlinux.itb
343boot-y			+= vmlinux.gz.itb
344boot-y			+= vmlinux.bz2.itb
345boot-y			+= vmlinux.lzma.itb
346boot-y			+= vmlinux.lzo.itb
347
348# compressed boot image targets (arch/mips/boot/compressed/)
349bootz-y			:= vmlinuz
350bootz-y			+= vmlinuz.bin
351bootz-y			+= vmlinuz.ecoff
352bootz-y			+= vmlinuz.srec
353ifeq ($(shell expr $(zload-y) \< 0xffffffff80000000 2> /dev/null), 0)
354bootz-y			+= uzImage.bin
355endif
356
357ifdef CONFIG_LASAT
358rom.bin rom.sw: vmlinux
359	$(Q)$(MAKE) $(build)=arch/mips/lasat/image \
360		$(bootvars-y) $@
361endif
362
363#
364# Some machines like the Indy need 32-bit ELF binaries for booting purposes.
365# Other need ECOFF, so we build a 32-bit ELF binary for them which we then
366# convert to ECOFF using elf2ecoff.
367#
368quiet_cmd_32 = OBJCOPY $@
369	cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
370vmlinux.32: vmlinux
371	$(call cmd,32)
372
373#
374# The 64-bit ELF tools are pretty broken so at this time we generate 64-bit
375# ELF files from 32-bit files by conversion.
376#
377quiet_cmd_64 = OBJCOPY $@
378	cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@
379vmlinux.64: vmlinux
380	$(call cmd,64)
381
382all:	$(all-y)
383
384# boot
385$(boot-y): $(vmlinux-32) FORCE
386	$(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \
387		$(bootvars-y) arch/mips/boot/$@
388
389ifdef CONFIG_SYS_SUPPORTS_ZBOOT
390# boot/compressed
391$(bootz-y): $(vmlinux-32) FORCE
392	$(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
393		$(bootvars-y) 32bit-bfd=$(32bit-bfd) $@
394else
395vmlinuz: FORCE
396	@echo '   CONFIG_SYS_SUPPORTS_ZBOOT is not enabled'
397	/bin/false
398endif
399
400
401CLEAN_FILES += vmlinux.32 vmlinux.64
402
403# device-trees
404core-$(CONFIG_BUILTIN_DTB) += arch/mips/boot/dts/
405
406%.dtb %.dtb.S %.dtb.o: | scripts
407	$(Q)$(MAKE) $(build)=arch/mips/boot/dts arch/mips/boot/dts/$@
408
409PHONY += dtbs
410dtbs: scripts
411	$(Q)$(MAKE) $(build)=arch/mips/boot/dts
412
413PHONY += dtbs_install
414dtbs_install:
415	$(Q)$(MAKE) $(dtbinst)=arch/mips/boot/dts
416
417archprepare:
418ifdef CONFIG_MIPS32_N32
419	@$(kecho) '  Checking missing-syscalls for N32'
420	$(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32"
421endif
422ifdef CONFIG_MIPS32_O32
423	@$(kecho) '  Checking missing-syscalls for O32'
424	$(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32"
425endif
426
427install:
428	$(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
429ifdef CONFIG_SYS_SUPPORTS_ZBOOT
430	$(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
431endif
432	$(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
433	$(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
434
435archclean:
436	$(Q)$(MAKE) $(clean)=arch/mips/boot
437	$(Q)$(MAKE) $(clean)=arch/mips/boot/compressed
438	$(Q)$(MAKE) $(clean)=arch/mips/boot/tools
439	$(Q)$(MAKE) $(clean)=arch/mips/lasat
440
441define archhelp
442	echo '  install              - install kernel into $(INSTALL_PATH)'
443	echo '  vmlinux.ecoff        - ECOFF boot image'
444	echo '  vmlinux.bin          - Raw binary boot image'
445	echo '  vmlinux.srec         - SREC boot image'
446	echo '  vmlinux.32           - 64-bit boot image wrapped in 32bits (IP22/IP32)'
447	echo '  vmlinuz              - Compressed boot(zboot) image'
448	echo '  vmlinuz.ecoff        - ECOFF zboot image'
449	echo '  vmlinuz.bin          - Raw binary zboot image'
450	echo '  vmlinuz.srec         - SREC zboot image'
451	echo '  uImage               - U-Boot image'
452	echo '  uImage.bin           - U-Boot image (uncompressed)'
453	echo '  uImage.bz2           - U-Boot image (bz2)'
454	echo '  uImage.gz            - U-Boot image (gzip)'
455	echo '  uImage.lzma          - U-Boot image (lzma)'
456	echo '  uImage.lzo           - U-Boot image (lzo)'
457	echo '  uzImage.bin          - U-Boot image (self-extracting)'
458	echo '  dtbs                 - Device-tree blobs for enabled boards'
459	echo '  dtbs_install         - Install dtbs to $(INSTALL_DTBS_PATH)'
460	echo
461	echo '  These will be default as appropriate for a configured platform.'
462	echo
463	echo '  If you are targeting a system supported by generic kernels you may'
464	echo '  configure the kernel for a given architecture target like so:'
465	echo
466	echo '  {micro32,32,64}{r1,r2,r6}{el,}_defconfig <BOARDS="list of boards">'
467	echo
468	echo '  Where BOARDS is some subset of the following:'
469	for board in $(sort $(BOARDS)); do echo "    $${board}"; done
470	echo
471	echo '  Specifically the following generic default configurations are'
472	echo '  supported:'
473	echo
474	$(foreach cfg,$(generic_defconfigs),
475	  printf "  %-24s - Build generic kernel for $(call describe_generic_defconfig,$(cfg))\n" $(cfg);)
476	echo
477	echo '  The following legacy default configurations have been converted to'
478	echo '  generic and can still be used:'
479	echo
480	$(foreach cfg,$(sort $(legacy_defconfigs)),
481	  printf "  %-24s - Build $($(cfg)-y)\n" $(cfg);)
482	echo
483	echo '  Otherwise, the following default configurations are available:'
484endef
485
486generic_config_dir = $(srctree)/arch/$(ARCH)/configs/generic
487generic_defconfigs :=
488
489#
490# If the user generates a generic kernel configuration without specifying a
491# list of boards to include the config fragments for, default to including all
492# available board config fragments.
493#
494ifeq ($(BOARDS),)
495BOARDS = $(patsubst board-%.config,%,$(notdir $(wildcard $(generic_config_dir)/board-*.config)))
496endif
497
498#
499# Generic kernel configurations which merge generic_defconfig with the
500# appropriate config fragments from arch/mips/configs/generic/, resulting in
501# the ability to easily configure the kernel for a given architecture,
502# endianness & set of boards without duplicating the needed configuration in
503# hundreds of defconfig files.
504#
505define gen_generic_defconfigs
506$(foreach bits,$(1),$(foreach rev,$(2),$(foreach endian,$(3),
507target := $(bits)$(rev)$(filter el,$(endian))_defconfig
508generic_defconfigs += $$(target)
509$$(target): $(generic_config_dir)/$(bits)$(rev).config
510$$(target): $(generic_config_dir)/$(endian).config
511)))
512endef
513
514$(eval $(call gen_generic_defconfigs,32 64,r1 r2 r6,eb el))
515$(eval $(call gen_generic_defconfigs,micro32,r2,eb el))
516
517define describe_generic_defconfig
518$(subst 32r,MIPS32 r,$(subst 64r,MIPS64 r,$(subst el, little endian,$(patsubst %_defconfig,%,$(1)))))
519endef
520
521.PHONY: $(generic_defconfigs)
522$(generic_defconfigs):
523	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
524		-m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/generic_defconfig $^ | \
525		grep -Ev '^#'
526	$(Q)cp $(KCONFIG_CONFIG) $(objtree)/.config.$@
527	$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig \
528		KCONFIG_CONFIG=$(objtree)/.config.$@ >/dev/null
529	$(Q)$(CONFIG_SHELL) $(srctree)/arch/$(ARCH)/tools/generic-board-config.sh \
530		$(srctree) $(objtree) $(objtree)/.config.$@ $(KCONFIG_CONFIG) \
531		"$(origin BOARDS)" $(BOARDS)
532	$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
533
534#
535# Prevent generic merge_config rules attempting to merge single fragments
536#
537$(generic_config_dir)/%.config: ;
538
539#
540# Prevent direct use of generic_defconfig, which is intended to be used as the
541# basis of the various ISA-specific targets generated above.
542#
543.PHONY: generic_defconfig
544generic_defconfig:
545	$(Q)echo "generic_defconfig is not intended for direct use, but should instead be"
546	$(Q)echo "used via an ISA-specific target from the following list:"
547	$(Q)echo
548	$(Q)for cfg in $(generic_defconfigs); do echo "  $${cfg}"; done
549	$(Q)echo
550	$(Q)false
551
552#
553# Legacy defconfig compatibility - these targets used to be real defconfigs but
554# now that the boards have been converted to use the generic kernel they are
555# wrappers around the generic rules above.
556#
557legacy_defconfigs		+= ocelot_defconfig
558ocelot_defconfig-y		:= 32r2el_defconfig BOARDS=ocelot
559
560legacy_defconfigs		+= sead3_defconfig
561sead3_defconfig-y		:= 32r2el_defconfig BOARDS=sead-3
562
563legacy_defconfigs		+= sead3micro_defconfig
564sead3micro_defconfig-y		:= micro32r2el_defconfig BOARDS=sead-3
565
566legacy_defconfigs		+= xilfpga_defconfig
567xilfpga_defconfig-y		:= 32r2el_defconfig BOARDS=xilfpga
568
569.PHONY: $(legacy_defconfigs)
570$(legacy_defconfigs):
571	$(Q)$(MAKE) -f $(srctree)/Makefile $($@-y)
572