xref: /openbmc/linux/arch/mips/Makefile (revision d827cbcd)
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) $(build)=arch/mips/tools elf-entry
17ifeq ($(CONFIG_CPU_LOONGSON3_WORKAROUNDS),y)
18	$(Q)$(MAKE) $(build)=arch/mips/tools loongson3-llsc-check
19endif
20	$(Q)$(MAKE) $(build)=arch/mips/boot/tools relocs
21
22KBUILD_DEFCONFIG := 32r2el_defconfig
23KBUILD_DTBS      := dtbs
24
25#
26# Select the object file format to substitute into the linker script.
27#
28ifdef CONFIG_CPU_LITTLE_ENDIAN
2932bit-tool-archpref	= mipsel
3064bit-tool-archpref	= mips64el
3132bit-bfd		= elf32-tradlittlemips
3264bit-bfd		= elf64-tradlittlemips
3332bit-emul		= elf32ltsmip
3464bit-emul		= elf64ltsmip
35else
3632bit-tool-archpref	= mips
3764bit-tool-archpref	= mips64
3832bit-bfd		= elf32-tradbigmips
3964bit-bfd		= elf64-tradbigmips
4032bit-emul		= elf32btsmip
4164bit-emul		= elf64btsmip
42endif
43
44ifdef CONFIG_32BIT
45tool-archpref		= $(32bit-tool-archpref)
46UTS_MACHINE		:= mips
47endif
48ifdef CONFIG_64BIT
49tool-archpref		= $(64bit-tool-archpref)
50UTS_MACHINE		:= mips64
51endif
52
53ifdef cross_compiling
54  ifeq ($(CROSS_COMPILE),)
55    CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux-  $(tool-archpref)-linux-gnu-  $(tool-archpref)-unknown-linux-gnu-)
56  endif
57endif
58
59ifdef CONFIG_FUNCTION_GRAPH_TRACER
60  ifndef KBUILD_MCOUNT_RA_ADDRESS
61    ifeq ($(call cc-option-yn,-mmcount-ra-address), y)
62      cflags-y += -mmcount-ra-address -DKBUILD_MCOUNT_RA_ADDRESS
63    endif
64  endif
65endif
66cflags-y += $(call cc-option, -mno-check-zero-division)
67
68ifdef CONFIG_32BIT
69ld-emul			= $(32bit-emul)
70vmlinux-32		= vmlinux
71vmlinux-64		= vmlinux.64
72
73cflags-y		+= -mabi=32
74endif
75
76ifdef CONFIG_64BIT
77ld-emul			= $(64bit-emul)
78vmlinux-32		= vmlinux.32
79vmlinux-64		= vmlinux
80
81cflags-y		+= -mabi=64
82endif
83
84all-$(CONFIG_BOOT_ELF32)	:= $(vmlinux-32)
85all-$(CONFIG_BOOT_ELF64)	:= $(vmlinux-64)
86all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlinuz
87
88#
89# GCC uses -G 0 -mabicalls -fpic as default.  We don't want PIC in the kernel
90# code since it only slows down the whole thing.  At some point we might make
91# use of global pointer optimizations but their use of $28 conflicts with
92# the current pointer optimization.
93#
94# The DECStation requires an ECOFF kernel for remote booting, other MIPS
95# machines may also.  Since BFD is incredibly buggy with respect to
96# crossformat linking we rely on the elf2ecoff tool for format conversion.
97#
98cflags-y			+= -G 0 -mno-abicalls -fno-pic -pipe
99cflags-y			+= -msoft-float
100LDFLAGS_vmlinux			+= -G 0 -static -n -nostdlib
101KBUILD_AFLAGS_MODULE		+= -mlong-calls
102KBUILD_CFLAGS_MODULE		+= -mlong-calls
103
104ifeq ($(CONFIG_RELOCATABLE),y)
105LDFLAGS_vmlinux			+= --emit-relocs
106endif
107
108#
109# pass -msoft-float to GAS if it supports it.  However on newer binutils
110# (specifically newer than 2.24.51.20140728) we then also need to explicitly
111# set ".set hardfloat" in all files which manipulate floating point registers.
112#
113ifneq ($(call as-option,-Wa$(comma)-msoft-float,),)
114	cflags-y		+= -DGAS_HAS_SET_HARDFLOAT -Wa,-msoft-float
115endif
116
117cflags-y += -ffreestanding
118
119cflags-$(CONFIG_CPU_BIG_ENDIAN)		+= -EB
120cflags-$(CONFIG_CPU_LITTLE_ENDIAN)	+= -EL
121
122cflags-$(CONFIG_SB1XXX_CORELIS)	+= $(call cc-option,-mno-sched-prolog) \
123				   -fno-omit-frame-pointer
124
125# Some distribution-specific toolchains might pass the -fstack-check
126# option during the build, which adds a simple stack-probe at the beginning
127# of every function.  This stack probe is to ensure that there is enough
128# stack space, else a SEGV is generated.  This is not desirable for MIPS
129# as kernel stacks are small, placed in unmapped virtual memory, and do not
130# grow when overflowed.  Especially on SGI IP27 platforms, this check will
131# lead to a NULL pointer dereference in _raw_spin_lock_irq.
132#
133# In disassembly, this stack probe appears at the top of a function as:
134#    sd		zero,<offset>(sp)
135# Where <offset> is a negative value.
136#
137cflags-y += -fno-stack-check
138
139# binutils from v2.35 when built with --enable-mips-fix-loongson3-llsc=yes,
140# supports an -mfix-loongson3-llsc flag which emits a sync prior to each ll
141# instruction to work around a CPU bug (see __SYNC_loongson3_war in asm/sync.h
142# for a description).
143#
144# We disable this in order to prevent the assembler meddling with the
145# instruction that labels refer to, ie. if we label an ll instruction:
146#
147# 1: ll v0, 0(a0)
148#
149# ...then with the assembler fix applied the label may actually point at a sync
150# instruction inserted by the assembler, and if we were using the label in an
151# exception table the table would no longer contain the address of the ll
152# instruction.
153#
154# Avoid this by explicitly disabling that assembler behaviour.
155#
156cflags-y += $(call as-option,-Wa$(comma)-mno-fix-loongson3-llsc,)
157
158#
159# CPU-dependent compiler/assembler options for optimization.
160#
161cflags-$(CONFIG_CPU_R3000)	+= -march=r3000
162cflags-$(CONFIG_CPU_TX39XX)	+= -march=r3900
163cflags-$(CONFIG_CPU_R4300)	+= -march=r4300 -Wa,--trap
164cflags-$(CONFIG_CPU_VR41XX)	+= -march=r4100 -Wa,--trap
165cflags-$(CONFIG_CPU_R4X00)	+= -march=r4600 -Wa,--trap
166cflags-$(CONFIG_CPU_TX49XX)	+= -march=r4600 -Wa,--trap
167cflags-$(CONFIG_CPU_MIPS32_R1)	+= -march=mips32 -Wa,--trap
168cflags-$(CONFIG_CPU_MIPS32_R2)	+= -march=mips32r2 -Wa,--trap
169cflags-$(CONFIG_CPU_MIPS32_R5)	+= -march=mips32r5 -Wa,--trap -modd-spreg
170cflags-$(CONFIG_CPU_MIPS32_R6)	+= -march=mips32r6 -Wa,--trap -modd-spreg
171cflags-$(CONFIG_CPU_MIPS64_R1)	+= -march=mips64 -Wa,--trap
172cflags-$(CONFIG_CPU_MIPS64_R2)	+= -march=mips64r2 -Wa,--trap
173cflags-$(CONFIG_CPU_MIPS64_R5)	+= -march=mips64r5 -Wa,--trap
174cflags-$(CONFIG_CPU_MIPS64_R6)	+= -march=mips64r6 -Wa,--trap
175cflags-$(CONFIG_CPU_P5600)	+= -march=p5600 -Wa,--trap -modd-spreg
176cflags-$(CONFIG_CPU_R5000)	+= -march=r5000 -Wa,--trap
177cflags-$(CONFIG_CPU_R5500)	+= $(call cc-option,-march=r5500,-march=r5000) \
178			-Wa,--trap
179cflags-$(CONFIG_CPU_NEVADA)	+= $(call cc-option,-march=rm5200,-march=r5000) \
180			-Wa,--trap
181cflags-$(CONFIG_CPU_RM7000)	+= $(call cc-option,-march=rm7000,-march=r5000) \
182			-Wa,--trap
183cflags-$(CONFIG_CPU_SB1)	+= $(call cc-option,-march=sb1,-march=r5000) \
184			-Wa,--trap
185cflags-$(CONFIG_CPU_SB1)	+= $(call cc-option,-mno-mdmx)
186cflags-$(CONFIG_CPU_SB1)	+= $(call cc-option,-mno-mips3d)
187cflags-$(CONFIG_CPU_R10000)	+= $(call cc-option,-march=r10000,-march=r8000) \
188			-Wa,--trap
189cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += $(call cc-option,-march=octeon) -Wa,--trap
190ifeq (,$(findstring march=octeon, $(cflags-$(CONFIG_CPU_CAVIUM_OCTEON))))
191cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -Wa,-march=octeon
192endif
193cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1
194cflags-$(CONFIG_CPU_BMIPS)	+= -march=mips32 -Wa,-mips32 -Wa,--trap
195
196cflags-$(CONFIG_CPU_R4000_WORKAROUNDS)	+= $(call cc-option,-mfix-r4000,)
197cflags-$(CONFIG_CPU_R4400_WORKAROUNDS)	+= $(call cc-option,-mfix-r4400,)
198cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS)	+= $(call cc-option,-mno-daddi,)
199
200# For smartmips configurations, there are hundreds of warnings due to ISA overrides
201# in assembly and header files. smartmips is only supported for MIPS32r1 onwards
202# and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or
203# similar directives in the kernel will spam the build logs with the following warnings:
204# Warning: the `smartmips' extension requires MIPS32 revision 1 or greater
205# or
206# Warning: the 64-bit MIPS architecture does not support the `smartmips' extension
207# Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has
208# been fixed properly.
209mips-cflags				:= $(cflags-y)
210ifeq ($(CONFIG_CPU_HAS_SMARTMIPS),y)
211smartmips-ase				:= $(call cc-option-yn,$(mips-cflags) -msmartmips)
212cflags-$(smartmips-ase)			+= -msmartmips -Wa,--no-warn
213endif
214ifeq ($(CONFIG_CPU_MICROMIPS),y)
215micromips-ase				:= $(call cc-option-yn,$(mips-cflags) -mmicromips)
216cflags-$(micromips-ase)			+= -mmicromips
217endif
218ifeq ($(CONFIG_CPU_HAS_MSA),y)
219toolchain-msa				:= $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa)
220cflags-$(toolchain-msa)			+= -DTOOLCHAIN_SUPPORTS_MSA
221endif
222toolchain-virt				:= $(call cc-option-yn,$(mips-cflags) -mvirt)
223cflags-$(toolchain-virt)		+= -DTOOLCHAIN_SUPPORTS_VIRT
224# For -mmicromips, use -Wa,-fatal-warnings to catch unsupported -mxpa which
225# only warns
226xpa-cflags-y				:= $(mips-cflags)
227xpa-cflags-$(micromips-ase)		+= -mmicromips -Wa$(comma)-fatal-warnings
228toolchain-xpa				:= $(call cc-option-yn,$(xpa-cflags-y) -mxpa)
229cflags-$(toolchain-xpa)			+= -DTOOLCHAIN_SUPPORTS_XPA
230toolchain-crc				:= $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mcrc)
231cflags-$(toolchain-crc)			+= -DTOOLCHAIN_SUPPORTS_CRC
232toolchain-dsp				:= $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mdsp)
233cflags-$(toolchain-dsp)			+= -DTOOLCHAIN_SUPPORTS_DSP
234toolchain-ginv				:= $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mginv)
235cflags-$(toolchain-ginv)		+= -DTOOLCHAIN_SUPPORTS_GINV
236
237#
238# Firmware support
239#
240libs-$(CONFIG_FW_ARC)		+= arch/mips/fw/arc/
241libs-$(CONFIG_FW_CFE)		+= arch/mips/fw/cfe/
242libs-$(CONFIG_FW_SNIPROM)	+= arch/mips/fw/sni/
243libs-y				+= arch/mips/fw/lib/
244
245#
246# Kernel compression
247#
248ifdef CONFIG_SYS_SUPPORTS_ZBOOT
249COMPRESSION_FNAME		= vmlinuz
250else
251COMPRESSION_FNAME		= vmlinux
252endif
253
254#
255# Board-dependent options and extra files
256#
257include arch/mips/Kbuild.platforms
258
259ifdef CONFIG_PHYSICAL_START
260load-y					= $(CONFIG_PHYSICAL_START)
261endif
262
263entry-y				= $(shell $(objtree)/arch/mips/tools/elf-entry vmlinux)
264cflags-y			+= -I$(srctree)/arch/mips/include/asm/mach-generic
265drivers-$(CONFIG_PCI)		+= arch/mips/pci/
266
267#
268# Automatically detect the build format. By default we choose
269# the elf format according to the load address.
270# We can always force a build with a 64-bits symbol format by
271# passing 'KBUILD_SYM32=no' option to the make's command line.
272#
273ifdef CONFIG_64BIT
274  ifndef KBUILD_SYM32
275    ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0)
276      KBUILD_SYM32 = y
277    endif
278  endif
279
280  ifeq ($(KBUILD_SYM32)$(call cc-option-yn,-msym32), yy)
281    cflags-y += -msym32 -DKBUILD_64BIT_SYM32
282  else
283    ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
284      $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
285    endif
286  endif
287endif
288
289# When linking a 32-bit executable the LLVM linker cannot cope with a
290# 32-bit load address that has been sign-extended to 64 bits.  Simply
291# remove the upper 32 bits then, as it is safe to do so with other
292# linkers.
293ifdef CONFIG_64BIT
294	load-ld			= $(load-y)
295else
296	load-ld			= $(subst 0xffffffff,0x,$(load-y))
297endif
298
299KBUILD_AFLAGS	+= $(cflags-y)
300KBUILD_CFLAGS	+= $(cflags-y)
301KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y) -DLINKER_LOAD_ADDRESS=$(load-ld)
302KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
303
304bootvars-y	= VMLINUX_LOAD_ADDRESS=$(load-y) \
305		  LINKER_LOAD_ADDRESS=$(load-ld) \
306		  VMLINUX_ENTRY_ADDRESS=$(entry-y) \
307		  PLATFORM="$(platform-y)" \
308		  ITS_INPUTS="$(its-y)"
309ifdef CONFIG_32BIT
310bootvars-y	+= ADDR_BITS=32
311endif
312ifdef CONFIG_64BIT
313bootvars-y	+= ADDR_BITS=64
314endif
315
316# This is required to get dwarf unwinding tables into .debug_frame
317# instead of .eh_frame so we don't discard them.
318KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
319
320KBUILD_LDFLAGS		+= -m $(ld-emul)
321
322ifdef CONFIG_MIPS
323CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
324	egrep -vw '__GNUC_(|MINOR_|PATCHLEVEL_)_' | \
325	sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
326endif
327
328OBJCOPYFLAGS		+= --remove-section=.reginfo
329
330head-y := arch/mips/kernel/head.o
331
332libs-y			+= arch/mips/lib/
333libs-$(CONFIG_MIPS_FP_SUPPORT) += arch/mips/math-emu/
334
335drivers-y			+= arch/mips/crypto/
336
337# suspend and hibernation support
338drivers-$(CONFIG_PM)	+= arch/mips/power/
339
340# boot image targets (arch/mips/boot/)
341boot-y			:= vmlinux.bin
342boot-y			+= vmlinux.ecoff
343boot-y			+= vmlinux.srec
344ifeq ($(shell expr $(load-y) \< 0xffffffff80000000 2> /dev/null), 0)
345boot-y			+= uImage
346boot-y			+= uImage.bin
347boot-y			+= uImage.bz2
348boot-y			+= uImage.gz
349boot-y			+= uImage.lzma
350boot-y			+= uImage.lzo
351endif
352boot-y			+= vmlinux.itb
353boot-y			+= vmlinux.gz.itb
354boot-y			+= vmlinux.bz2.itb
355boot-y			+= vmlinux.lzma.itb
356boot-y			+= vmlinux.lzo.itb
357
358# compressed boot image targets (arch/mips/boot/compressed/)
359bootz-y			:= vmlinuz
360bootz-y			+= vmlinuz.bin
361bootz-y			+= vmlinuz.ecoff
362bootz-y			+= vmlinuz.srec
363ifeq ($(shell expr $(zload-y) \< 0xffffffff80000000 2> /dev/null), 0)
364bootz-y			+= uzImage.bin
365endif
366bootz-y			+= vmlinuz.itb
367
368#
369# Some machines like the Indy need 32-bit ELF binaries for booting purposes.
370# Other need ECOFF, so we build a 32-bit ELF binary for them which we then
371# convert to ECOFF using elf2ecoff.
372#
373quiet_cmd_32 = OBJCOPY $@
374	cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
375vmlinux.32: vmlinux
376	$(call cmd,32)
377
378#
379# The 64-bit ELF tools are pretty broken so at this time we generate 64-bit
380# ELF files from 32-bit files by conversion.
381#
382quiet_cmd_64 = OBJCOPY $@
383	cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@
384vmlinux.64: vmlinux
385	$(call cmd,64)
386
387all:	$(all-y) $(KBUILD_DTBS)
388
389# boot
390$(boot-y): $(vmlinux-32) FORCE
391	$(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \
392		$(bootvars-y) arch/mips/boot/$@
393
394ifdef CONFIG_SYS_SUPPORTS_ZBOOT
395# boot/compressed
396$(bootz-y): $(vmlinux-32) FORCE
397	$(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
398		$(bootvars-y) 32bit-bfd=$(32bit-bfd) arch/mips/boot/$@
399else
400vmlinuz: FORCE
401	@echo '   CONFIG_SYS_SUPPORTS_ZBOOT is not enabled'
402	/bin/false
403endif
404
405
406CLEAN_FILES += vmlinux.32 vmlinux.64
407
408# device-trees
409core-y += arch/mips/boot/dts/
410
411archprepare:
412ifdef CONFIG_MIPS32_N32
413	@$(kecho) '  Checking missing-syscalls for N32'
414	$(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32"
415endif
416ifdef CONFIG_MIPS32_O32
417	@$(kecho) '  Checking missing-syscalls for O32'
418	$(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32"
419endif
420
421install:
422	$(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
423ifdef CONFIG_SYS_SUPPORTS_ZBOOT
424	$(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
425endif
426	$(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
427	$(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
428
429archclean:
430	$(Q)$(MAKE) $(clean)=arch/mips/boot
431	$(Q)$(MAKE) $(clean)=arch/mips/boot/compressed
432	$(Q)$(MAKE) $(clean)=arch/mips/boot/tools
433
434archheaders:
435	$(Q)$(MAKE) $(build)=arch/mips/kernel/syscalls all
436
437define archhelp
438	echo '  install              - install kernel into $(INSTALL_PATH)'
439	echo '  vmlinux.ecoff        - ECOFF boot image'
440	echo '  vmlinux.bin          - Raw binary boot image'
441	echo '  vmlinux.srec         - SREC boot image'
442	echo '  vmlinux.32           - 64-bit boot image wrapped in 32bits (IP22/IP32)'
443	echo '  vmlinuz              - Compressed boot(zboot) image'
444	echo '  vmlinuz.ecoff        - ECOFF zboot image'
445	echo '  vmlinuz.bin          - Raw binary zboot image'
446	echo '  vmlinuz.srec         - SREC zboot image'
447	echo '  uImage               - U-Boot image'
448	echo '  uImage.bin           - U-Boot image (uncompressed)'
449	echo '  uImage.bz2           - U-Boot image (bz2)'
450	echo '  uImage.gz            - U-Boot image (gzip)'
451	echo '  uImage.lzma          - U-Boot image (lzma)'
452	echo '  uImage.lzo           - U-Boot image (lzo)'
453	echo '  uzImage.bin          - U-Boot image (self-extracting)'
454	echo
455	echo '  These will be default as appropriate for a configured platform.'
456	echo
457	echo '  If you are targeting a system supported by generic kernels you may'
458	echo '  configure the kernel for a given architecture target like so:'
459	echo
460	echo '  {micro32,32,64}{r1,r2,r6}{el,}_defconfig <BOARDS="list of boards">'
461	echo
462	echo '  Where BOARDS is some subset of the following:'
463	for board in $(sort $(BOARDS)); do echo "    $${board}"; done
464	echo
465	echo '  Specifically the following generic default configurations are'
466	echo '  supported:'
467	echo
468	$(foreach cfg,$(generic_defconfigs),
469	  printf "  %-24s - Build generic kernel for $(call describe_generic_defconfig,$(cfg))\n" $(cfg);)
470	echo
471	echo '  The following legacy default configurations have been converted to'
472	echo '  generic and can still be used:'
473	echo
474	$(foreach cfg,$(sort $(legacy_defconfigs)),
475	  printf "  %-24s - Build $($(cfg)-y)\n" $(cfg);)
476	echo
477	echo '  Otherwise, the following default configurations are available:'
478endef
479
480generic_config_dir = $(srctree)/arch/$(ARCH)/configs/generic
481generic_defconfigs :=
482
483#
484# If the user generates a generic kernel configuration without specifying a
485# list of boards to include the config fragments for, default to including all
486# available board config fragments.
487#
488ifeq ($(BOARDS),)
489BOARDS = $(patsubst board-%.config,%,$(notdir $(wildcard $(generic_config_dir)/board-*.config)))
490endif
491
492#
493# Generic kernel configurations which merge generic_defconfig with the
494# appropriate config fragments from arch/mips/configs/generic/, resulting in
495# the ability to easily configure the kernel for a given architecture,
496# endianness & set of boards without duplicating the needed configuration in
497# hundreds of defconfig files.
498#
499define gen_generic_defconfigs
500$(foreach bits,$(1),$(foreach rev,$(2),$(foreach endian,$(3),
501target := $(bits)$(rev)$(filter el,$(endian))_defconfig
502generic_defconfigs += $$(target)
503$$(target): $(generic_config_dir)/$(bits)$(rev).config
504$$(target): $(generic_config_dir)/$(endian).config
505)))
506endef
507
508$(eval $(call gen_generic_defconfigs,32 64,r1 r2 r6,eb el))
509$(eval $(call gen_generic_defconfigs,micro32,r2,eb el))
510
511define describe_generic_defconfig
512$(subst 32r,MIPS32 r,$(subst 64r,MIPS64 r,$(subst el, little endian,$(patsubst %_defconfig,%,$(1)))))
513endef
514
515.PHONY: $(generic_defconfigs)
516$(generic_defconfigs):
517	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
518		-m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/generic_defconfig $^ | \
519		grep -Ev '^#'
520	$(Q)cp $(KCONFIG_CONFIG) $(objtree)/.config.$@
521	$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig \
522		KCONFIG_CONFIG=$(objtree)/.config.$@ >/dev/null
523	$(Q)$(CONFIG_SHELL) $(srctree)/arch/$(ARCH)/tools/generic-board-config.sh \
524		$(srctree) $(objtree) $(objtree)/.config.$@ $(KCONFIG_CONFIG) \
525		"$(origin BOARDS)" $(BOARDS)
526	$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
527
528#
529# Prevent generic merge_config rules attempting to merge single fragments
530#
531$(generic_config_dir)/%.config: ;
532
533#
534# Prevent direct use of generic_defconfig, which is intended to be used as the
535# basis of the various ISA-specific targets generated above.
536#
537.PHONY: generic_defconfig
538generic_defconfig:
539	$(Q)echo "generic_defconfig is not intended for direct use, but should instead be"
540	$(Q)echo "used via an ISA-specific target from the following list:"
541	$(Q)echo
542	$(Q)for cfg in $(generic_defconfigs); do echo "  $${cfg}"; done
543	$(Q)echo
544	$(Q)false
545
546#
547# Legacy defconfig compatibility - these targets used to be real defconfigs but
548# now that the boards have been converted to use the generic kernel they are
549# wrappers around the generic rules above.
550#
551legacy_defconfigs		+= ocelot_defconfig
552ocelot_defconfig-y		:= 32r2el_defconfig BOARDS=ocelot
553
554legacy_defconfigs		+= sead3_defconfig
555sead3_defconfig-y		:= 32r2el_defconfig BOARDS=sead-3
556
557legacy_defconfigs		+= sead3micro_defconfig
558sead3micro_defconfig-y		:= micro32r2el_defconfig BOARDS=sead-3
559
560legacy_defconfigs		+= xilfpga_defconfig
561xilfpga_defconfig-y		:= 32r2el_defconfig BOARDS=xilfpga
562
563.PHONY: $(legacy_defconfigs)
564$(legacy_defconfigs):
565	$(Q)$(MAKE) -f $(srctree)/Makefile $($@-y)
566