projects/linux·blob master · refs

570 lines · 20.1 KiB

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.
12#
13
14archscripts: scripts_basic
15 $(Q)$(MAKE) $(build)=arch/mips/tools elf-entry
16ifeq ($(CONFIG_CPU_LOONGSON3_WORKAROUNDS),y)
17 $(Q)$(MAKE) $(build)=arch/mips/tools loongson3-llsc-check
18endif
19 $(Q)$(MAKE) $(build)=arch/mips/boot/tools relocs
20
21KBUILD_DEFCONFIG := 32r2el_defconfig
22KBUILD_DTBS := dtbs
23
24#
25# Select the object file format to substitute into the linker script.
26#
27ifdef CONFIG_CPU_LITTLE_ENDIAN
2832bit-tool-archpref = mipsel
2964bit-tool-archpref = mips64el
3032bit-bfd = elf32-tradlittlemips
3164bit-bfd = elf64-tradlittlemips
3232bit-emul = elf32ltsmip
3364bit-emul = elf64ltsmip
34else
3532bit-tool-archpref = mips
3664bit-tool-archpref = mips64
3732bit-bfd = elf32-tradbigmips
3864bit-bfd = elf64-tradbigmips
3932bit-emul = elf32btsmip
4064bit-emul = elf64btsmip
41endif
42
43ifdef CONFIG_32BIT
44tool-archpref = $(32bit-tool-archpref)
45UTS_MACHINE := mips
46endif
47ifdef CONFIG_64BIT
48tool-archpref = $(64bit-tool-archpref)
49UTS_MACHINE := mips64
50endif
51
52ifdef cross_compiling
53 ifeq ($(CROSS_COMPILE),)
54 CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux- $(tool-archpref)-linux-gnu- $(tool-archpref)-unknown-linux-gnu-)
55 endif
56endif
57
58ifdef CONFIG_FUNCTION_GRAPH_TRACER
59 ifndef KBUILD_MCOUNT_RA_ADDRESS
60 ifeq ($(call cc-option-yn,-mmcount-ra-address), y)
61 cflags-y += -mmcount-ra-address -DKBUILD_MCOUNT_RA_ADDRESS
62 endif
63 endif
64endif
65cflags-y += $(call cc-option, -mno-check-zero-division)
66
67ifdef CONFIG_32BIT
68ld-emul = $(32bit-emul)
69vmlinux-32 = vmlinux
70vmlinux-64 = vmlinux.64
71
72cflags-y += -mabi=32
73endif
74
75ifdef CONFIG_64BIT
76ld-emul = $(64bit-emul)
77vmlinux-32 = vmlinux.32
78vmlinux-64 = vmlinux
79
80cflags-y += -mabi=64
81endif
82
83all-$(CONFIG_BOOT_ELF32) := $(vmlinux-32)
84all-$(CONFIG_BOOT_ELF64) := $(vmlinux-64)
85all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlinuz
86
87#
88# GCC uses -G 0 -mabicalls -fpic as default. We don't want PIC in the kernel
89# code since it only slows down the whole thing. At some point we might make
90# use of global pointer optimizations but their use of $28 conflicts with
91# the current pointer optimization.
92#
93# The DECStation requires an ECOFF kernel for remote booting, other MIPS
94# machines may also. Since BFD is incredibly buggy with respect to
95# crossformat linking we rely on the elf2ecoff tool for format conversion.
96#
97cflags-y += -G 0 -mno-abicalls -fno-pic -pipe
98cflags-y += -msoft-float -Wa,-msoft-float
99LDFLAGS_vmlinux += -G 0 -static -n -nostdlib
100KBUILD_AFLAGS_MODULE += -mlong-calls
101KBUILD_CFLAGS_MODULE += -mlong-calls
102
103cflags-y += -ffreestanding
104
105cflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB
106cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -EL
107
108cflags-$(CONFIG_SB1XXX_CORELIS) += $(call cc-option,-mno-sched-prolog) \
109 -fno-omit-frame-pointer
110
111# Some distribution-specific toolchains might pass the -fstack-check
112# option during the build, which adds a simple stack-probe at the beginning
113# of every function. This stack probe is to ensure that there is enough
114# stack space, else a SEGV is generated. This is not desirable for MIPS
115# as kernel stacks are small, placed in unmapped virtual memory, and do not
116# grow when overflowed. Especially on SGI IP27 platforms, this check will
117# lead to a NULL pointer dereference in _raw_spin_lock_irq.
118#
119# In disassembly, this stack probe appears at the top of a function as:
120# sd zero,<offset>(sp)
121# Where <offset> is a negative value.
122#
123cflags-y += -fno-stack-check
124
125# binutils from v2.35 when built with --enable-mips-fix-loongson3-llsc=yes,
126# supports an -mfix-loongson3-llsc flag which emits a sync prior to each ll
127# instruction to work around a CPU bug (see __SYNC_loongson3_war in asm/sync.h
128# for a description).
129#
130# We disable this in order to prevent the assembler meddling with the
131# instruction that labels refer to, ie. if we label an ll instruction:
132#
133# 1: ll v0, 0(a0)
134#
135# ...then with the assembler fix applied the label may actually point at a sync
136# instruction inserted by the assembler, and if we were using the label in an
137# exception table the table would no longer contain the address of the ll
138# instruction.
139#
140# Avoid this by explicitly disabling that assembler behaviour.
141#
142cflags-y += $(call cc-option,-Wa$(comma)-mno-fix-loongson3-llsc,)
143
144#
145# CPU-dependent compiler/assembler options for optimization.
146#
147cflags-$(CONFIG_CPU_R3000) += $(call cc-option,-march=r3000,-march=mips1)
148cflags-$(CONFIG_CPU_R4300) += $(call cc-option,-march=r4300,-march=mips3) -Wa,--trap
149cflags-$(CONFIG_CPU_R4X00) += $(call cc-option,-march=r4600,-march=mips3) -Wa,--trap
150cflags-$(CONFIG_CPU_TX49XX) += $(call cc-option,-march=r4600,-march=mips3) -Wa,--trap
151cflags-$(CONFIG_CPU_MIPS32_R1) += -march=mips32 -Wa,--trap
152cflags-$(CONFIG_CPU_MIPS32_R2) += -march=mips32r2 -Wa,--trap
153cflags-$(CONFIG_CPU_MIPS32_R5) += -march=mips32r5 -Wa,--trap -modd-spreg
154cflags-$(CONFIG_CPU_MIPS32_R6) += -march=mips32r6 -Wa,--trap -modd-spreg
155cflags-$(CONFIG_CPU_MIPS64_R1) += -march=mips64 -Wa,--trap
156cflags-$(CONFIG_CPU_MIPS64_R2) += -march=mips64r2 -Wa,--trap
157cflags-$(CONFIG_CPU_MIPS64_R5) += -march=mips64r5 -Wa,--trap
158cflags-$(CONFIG_CPU_MIPS64_R6) += -march=mips64r6 -Wa,--trap
159cflags-$(CONFIG_CPU_P5600) += $(call cc-option,-march=p5600,-march=mips32r5) \
160 -Wa,--trap -modd-spreg
161cflags-$(CONFIG_CPU_R5000) += $(call cc-option,-march=r5000,-march=mips4) \
162 -Wa,--trap
163cflags-$(CONFIG_CPU_R5500) += $(call cc-option,-march=r5500,-march=mips4) \
164 -Wa,--trap
165cflags-$(CONFIG_CPU_NEVADA) += $(call cc-option,-march=rm5200,-march=mips4) \
166 -Wa,--trap
167cflags-$(CONFIG_CPU_RM7000) += $(call cc-option,-march=rm7000,-march=mips4) \
168 -Wa,--trap
169cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-march=sb1,-march=mips64) \
170 -Wa,--trap
171cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-mno-mdmx)
172cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-mno-mips3d)
173cflags-$(CONFIG_CPU_R10000) += $(call cc-option,-march=r10000,-march=mips4) \
174 -Wa,--trap
175cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -march=octeon -Wa,--trap
176cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1
177cflags-$(CONFIG_CPU_BMIPS) += -march=mips32 -Wa,--trap
178
179cflags-$(CONFIG_CPU_LOONGSON2E) += \
180 $(call cc-option,-march=loongson2e,-march=mips3) -Wa,--trap
181cflags-$(CONFIG_CPU_LOONGSON2F) += \
182 $(call cc-option,-march=loongson2f,-march=mips3) -Wa,--trap
183# Some -march= flags enable MMI instructions, and GCC complains about that
184# support being enabled alongside -msoft-float. Thus explicitly disable MMI.
185cflags-$(CONFIG_CPU_LOONGSON2EF) += $(call cc-option,-mno-loongson-mmi)
186cflags-$(CONFIG_CPU_LOONGSON64) += \
187 $(call cc-option,-march=loongson3a,-march=mips64r2) -Wa,--trap
188cflags-$(CONFIG_CPU_LOONGSON64) += $(call cc-option,-mno-loongson-mmi)
189
190cflags-$(CONFIG_CPU_R4000_WORKAROUNDS) += $(call cc-option,-mfix-r4000,)
191cflags-$(CONFIG_CPU_R4400_WORKAROUNDS) += $(call cc-option,-mfix-r4400,)
192cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS) += $(call cc-option,-mno-daddi,)
193ifdef CONFIG_CPU_LOONGSON2F_WORKAROUNDS
194cflags-$(CONFIG_CPU_NOP_WORKAROUNDS) += -Wa,-mfix-loongson2f-nop
195cflags-$(CONFIG_CPU_JUMP_WORKAROUNDS) += -Wa,-mfix-loongson2f-jump
196endif
197
198#
199# Some versions of binutils, not currently mainline as of 2019/02/04, support
200# an -mfix-loongson3-llsc flag which emits a sync prior to each ll instruction
201# to work around a CPU bug (see __SYNC_loongson3_war in asm/sync.h for a
202# description).
203#
204# We disable this in order to prevent the assembler meddling with the
205# instruction that labels refer to, ie. if we label an ll instruction:
206#
207# 1: ll v0, 0(a0)
208#
209# ...then with the assembler fix applied the label may actually point at a sync
210# instruction inserted by the assembler, and if we were using the label in an
211# exception table the table would no longer contain the address of the ll
212# instruction.
213#
214# Avoid this by explicitly disabling that assembler behaviour. If upstream
215# binutils does not merge support for the flag then we can revisit & remove
216# this later - for now it ensures vendor toolchains don't cause problems.
217#
218cflags-$(CONFIG_CPU_LOONGSON64) += $(call as-option,-Wa$(comma)-mno-fix-loongson3-llsc,)
219
220# For smartmips configurations, there are hundreds of warnings due to ISA overrides
221# in assembly and header files. smartmips is only supported for MIPS32r1 onwards
222# and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or
223# similar directives in the kernel will spam the build logs with the following warnings:
224# Warning: the `smartmips' extension requires MIPS32 revision 1 or greater
225# or
226# Warning: the 64-bit MIPS architecture does not support the `smartmips' extension
227# Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has
228# been fixed properly.
229mips-cflags := $(cflags-y)
230ifeq ($(CONFIG_CPU_HAS_SMARTMIPS),y)
231smartmips-ase := $(call cc-option-yn,$(mips-cflags) -msmartmips)
232cflags-$(smartmips-ase) += -msmartmips -Wa,--no-warn
233endif
234ifeq ($(CONFIG_CPU_MICROMIPS),y)
235micromips-ase := $(call cc-option-yn,$(mips-cflags) -mmicromips)
236cflags-$(micromips-ase) += -mmicromips
237endif
238ifeq ($(CONFIG_CPU_HAS_MSA),y)
239toolchain-msa := $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa)
240cflags-$(toolchain-msa) += -DTOOLCHAIN_SUPPORTS_MSA
241endif
242toolchain-virt := $(call cc-option-yn,$(mips-cflags) -mvirt)
243cflags-$(toolchain-virt) += -DTOOLCHAIN_SUPPORTS_VIRT
244# For -mmicromips, use -Wa,-fatal-warnings to catch unsupported -mxpa which
245# only warns
246xpa-cflags-y := $(mips-cflags)
247xpa-cflags-$(micromips-ase) += -mmicromips -Wa$(comma)-fatal-warnings
248toolchain-xpa := $(call cc-option-yn,$(xpa-cflags-y) -mxpa)
249cflags-$(toolchain-xpa) += -DTOOLCHAIN_SUPPORTS_XPA
250toolchain-crc := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mcrc)
251cflags-$(toolchain-crc) += -DTOOLCHAIN_SUPPORTS_CRC
252toolchain-dsp := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mdsp)
253cflags-$(toolchain-dsp) += -DTOOLCHAIN_SUPPORTS_DSP
254toolchain-ginv := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mginv)
255cflags-$(toolchain-ginv) += -DTOOLCHAIN_SUPPORTS_GINV
256
257#
258# Firmware support
259#
260libs-$(CONFIG_FW_ARC) += arch/mips/fw/arc/
261libs-$(CONFIG_FW_CFE) += arch/mips/fw/cfe/
262libs-$(CONFIG_FW_SNIPROM) += arch/mips/fw/sni/
263libs-y += arch/mips/fw/lib/
264
265#
266# Kernel compression
267#
268ifdef CONFIG_SYS_SUPPORTS_ZBOOT
269COMPRESSION_FNAME = vmlinuz
270else
271COMPRESSION_FNAME = vmlinux
272endif
273
274#
275# Board-dependent options and extra files
276#
277include $(srctree)/arch/mips/Kbuild.platforms
278
279ifdef CONFIG_PHYSICAL_START
280load-y = $(CONFIG_PHYSICAL_START)
281endif
282
283entry-y = $(shell $(objtree)/arch/mips/tools/elf-entry vmlinux)
284cflags-y += -I$(srctree)/arch/mips/include/asm/mach-generic
285drivers-$(CONFIG_PCI) += arch/mips/pci/
286
287#
288# Automatically detect the build format. By default we choose
289# the elf format according to the load address.
290# We can always force a build with a 64-bits symbol format by
291# passing 'KBUILD_SYM32=no' option to the make's command line.
292#
293ifdef CONFIG_64BIT
294 ifndef KBUILD_SYM32
295 ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0)
296 KBUILD_SYM32 = $(call cc-option-yn, -msym32)
297 endif
298 endif
299
300 ifeq ($(KBUILD_SYM32), y)
301 cflags-$(KBUILD_SYM32) += -msym32 -DKBUILD_64BIT_SYM32
302 else
303 ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
304 $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
305 endif
306 endif
307endif
308
309# When linking a 32-bit executable the LLVM linker cannot cope with a
310# 32-bit load address that has been sign-extended to 64 bits. Simply
311# remove the upper 32 bits then, as it is safe to do so with other
312# linkers.
313ifdef CONFIG_64BIT
314 load-ld = $(load-y)
315else
316 load-ld = $(subst 0xffffffff,0x,$(load-y))
317endif
318
319KBUILD_AFLAGS += $(cflags-y)
320KBUILD_CFLAGS += $(cflags-y)
321KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y) -DLINKER_LOAD_ADDRESS=$(load-ld)
322KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
323
324bootvars-y = VMLINUX_LOAD_ADDRESS=$(load-y) \
325 LINKER_LOAD_ADDRESS=$(load-ld) \
326 VMLINUX_ENTRY_ADDRESS=$(entry-y) \
327 PLATFORM="$(platform-y)" \
328 ITS_INPUTS="$(its-y)"
329ifdef CONFIG_32BIT
330bootvars-y += ADDR_BITS=32
331endif
332ifdef CONFIG_64BIT
333bootvars-y += ADDR_BITS=64
334endif
335
336# This is required to get dwarf unwinding tables into .debug_frame
337# instead of .eh_frame so we don't discard them.
338KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
339
340KBUILD_LDFLAGS += -m $(ld-emul)
341
342ifdef need-compiler
343CHECKFLAGS += $(shell $(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
344 grep -E -vw '__GNUC_(MINOR_|PATCHLEVEL_)?_' | \
345 sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
346endif
347
348OBJCOPYFLAGS += --remove-section=.reginfo
349
350libs-y += arch/mips/lib/
351libs-$(CONFIG_MIPS_FP_SUPPORT) += arch/mips/math-emu/
352
353# suspend and hibernation support
354drivers-$(CONFIG_PM) += arch/mips/power/
355
356# boot image targets (arch/mips/boot/)
357boot-y := vmlinux.bin
358boot-y += vmlinux.ecoff
359boot-y += vmlinux.srec
360boot-y += uImage
361boot-y += uImage.bin
362boot-y += uImage.bz2
363boot-y += uImage.gz
364boot-y += uImage.lzma
365boot-y += uImage.lzo
366boot-y += vmlinux.itb
367boot-y += vmlinux.gz.itb
368boot-y += vmlinux.bz2.itb
369boot-y += vmlinux.lzma.itb
370boot-y += vmlinux.lzo.itb
371
372# compressed boot image targets (arch/mips/boot/compressed/)
373bootz-y := vmlinuz
374bootz-y += vmlinuz.bin
375bootz-y += vmlinuz.ecoff
376bootz-y += vmlinuz.srec
377bootz-y += uzImage.bin
378bootz-y += vmlinuz.itb
379
380#
381# Some machines like the Indy need 32-bit ELF binaries for booting purposes.
382# Other need ECOFF, so we build a 32-bit ELF binary for them which we then
383# convert to ECOFF using elf2ecoff.
384#
385quiet_cmd_32 = OBJCOPY $@
386 cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
387vmlinux.32: vmlinux
388 $(call cmd,32)
389
390#
391# The 64-bit ELF tools are pretty broken so at this time we generate 64-bit
392# ELF files from 32-bit files by conversion.
393#
394quiet_cmd_64 = OBJCOPY $@
395 cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@
396vmlinux.64: vmlinux
397 $(call cmd,64)
398
399all: $(all-y) $(KBUILD_DTBS)
400
401# boot
402$(boot-y): $(vmlinux-32) FORCE
403 $(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \
404 $(bootvars-y) arch/mips/boot/$@
405
406ifdef CONFIG_SYS_SUPPORTS_ZBOOT
407# boot/compressed
408$(bootz-y): $(vmlinux-32) FORCE
409 $(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
410 $(bootvars-y) 32bit-bfd=$(32bit-bfd) arch/mips/boot/$@
411else
412vmlinuz: FORCE
413 @echo ' CONFIG_SYS_SUPPORTS_ZBOOT is not enabled'
414 /bin/false
415endif
416
417
418CLEAN_FILES += vmlinux.32 vmlinux.64
419
420archprepare:
421ifdef CONFIG_MIPS32_N32
422 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_instance="N32" missing_syscalls_flags="-mabi=n32"
423endif
424ifdef CONFIG_MIPS32_O32
425 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_instance="O32" missing_syscalls_flags="-mabi=32"
426endif
427
428install:
429 $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
430ifdef CONFIG_SYS_SUPPORTS_ZBOOT
431 $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
432endif
433 $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
434 $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
435
436archheaders:
437 $(Q)$(MAKE) $(build)=arch/mips/kernel/syscalls all
438
439define archhelp
440 echo ' install - install kernel into $(INSTALL_PATH)'
441 echo ' vmlinux.ecoff - ECOFF boot image'
442 echo ' vmlinux.bin - Raw binary boot image'
443 echo ' vmlinux.srec - SREC boot image'
444 echo ' vmlinux.32 - 64-bit boot image wrapped in 32bits (IP22/IP32)'
445 echo ' vmlinuz - Compressed boot(zboot) image'
446 echo ' vmlinuz.ecoff - ECOFF zboot image'
447 echo ' vmlinuz.bin - Raw binary zboot image'
448 echo ' vmlinuz.srec - SREC zboot image'
449 echo ' uImage - U-Boot image'
450 echo ' uImage.bin - U-Boot image (uncompressed)'
451 echo ' uImage.bz2 - U-Boot image (bz2)'
452 echo ' uImage.gz - U-Boot image (gzip)'
453 echo ' uImage.lzma - U-Boot image (lzma)'
454 echo ' uImage.lzo - U-Boot image (lzo)'
455 echo ' uzImage.bin - U-Boot image (self-extracting)'
456 echo
457 echo ' These will be default as appropriate for a configured platform.'
458 echo
459 echo ' If you are targeting a system supported by generic kernels you may'
460 echo ' configure the kernel for a given architecture target like so:'
461 echo
462 echo ' {micro32,32,64}{r1,r2,r6}{el,}_defconfig <BOARDS="list of boards">'
463 echo
464 echo ' Where BOARDS is some subset of the following:'
465 for board in $(sort $(BOARDS)); do echo " $${board}"; done
466 echo
467 echo ' Specifically the following generic default configurations are'
468 echo ' supported:'
469 echo
470 $(foreach cfg,$(generic_defconfigs),
471 printf " %-24s - Build generic kernel for $(call describe_generic_defconfig,$(cfg))\n" $(cfg);)
472 echo
473 echo ' The following legacy default configurations have been converted to'
474 echo ' generic and can still be used:'
475 echo
476 $(foreach cfg,$(sort $(legacy_defconfigs)),
477 printf " %-24s - Build $($(cfg)-y)\n" $(cfg);)
478 echo
479 echo ' Otherwise, the following default configurations are available:'
480endef
481
482generic_config_dir = $(srctree)/arch/$(ARCH)/configs/generic
483generic_defconfigs :=
484
485#
486# If the user generates a generic kernel configuration without specifying a
487# list of boards to include the config fragments for, default to including all
488# available board config fragments.
489#
490ifeq ($(BOARDS),)
491BOARDS = $(patsubst board-%.config,%,$(notdir $(wildcard $(generic_config_dir)/board-*.config)))
492endif
493
494#
495# Generic kernel configurations which merge generic_defconfig with the
496# appropriate config fragments from arch/mips/configs/generic/, resulting in
497# the ability to easily configure the kernel for a given architecture,
498# endianness & set of boards without duplicating the needed configuration in
499# hundreds of defconfig files.
500#
501define gen_generic_defconfigs
502$(foreach bits,$(1),$(foreach rev,$(2),$(foreach endian,$(3),
503target := $(bits)$(rev)$(filter el,$(endian))_defconfig
504generic_defconfigs += $$(target)
505$$(target): $(generic_config_dir)/$(bits)$(rev).config
506$$(target): $(generic_config_dir)/$(endian).config
507)))
508endef
509
510$(eval $(call gen_generic_defconfigs,32 64,r1 r2 r6,eb el))
511$(eval $(call gen_generic_defconfigs,micro32,r2,eb el))
512
513define describe_generic_defconfig
514$(subst 32r,MIPS32 r,$(subst 64r,MIPS64 r,$(subst el, little endian,$(patsubst %_defconfig,%,$(1)))))
515endef
516
517.PHONY: $(generic_defconfigs)
518$(generic_defconfigs):
519 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
520 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/generic_defconfig $^ | \
521 grep -Ev '^#'
522 $(Q)cp $(KCONFIG_CONFIG) $(objtree)/.config.$@
523 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig \
524 KCONFIG_CONFIG=$(objtree)/.config.$@ >/dev/null
525 $(Q)$(CONFIG_SHELL) $(srctree)/arch/$(ARCH)/tools/generic-board-config.sh \
526 $(srctree) $(objtree) $(objtree)/.config.$@ $(KCONFIG_CONFIG) \
527 "$(origin BOARDS)" $(BOARDS)
528 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
529
530#
531# Prevent generic merge_config rules attempting to merge single fragments
532#
533$(generic_config_dir)/%.config: ;
534
535#
536# Prevent direct use of generic_defconfig, which is intended to be used as the
537# basis of the various ISA-specific targets generated above.
538#
539.PHONY: generic_defconfig
540generic_defconfig:
541 $(Q)echo "generic_defconfig is not intended for direct use, but should instead be"
542 $(Q)echo "used via an ISA-specific target from the following list:"
543 $(Q)echo
544 $(Q)for cfg in $(generic_defconfigs); do echo " $${cfg}"; done
545 $(Q)echo
546 $(Q)false
547
548#
549# Legacy defconfig compatibility - these targets used to be real defconfigs but
550# now that the boards have been converted to use the generic kernel they are
551# wrappers around the generic rules above.
552#
553legacy_defconfigs += ocelot_defconfig
554ocelot_defconfig-y := 32r2el_defconfig BOARDS=ocelot
555
556legacy_defconfigs += sead3_defconfig
557sead3_defconfig-y := 32r2el_defconfig BOARDS=sead-3
558
559legacy_defconfigs += sead3micro_defconfig
560sead3micro_defconfig-y := micro32r2el_defconfig BOARDS=sead-3
561
562legacy_defconfigs += xilfpga_defconfig
563xilfpga_defconfig-y := 32r2el_defconfig BOARDS=xilfpga
564
565legacy_defconfigs += pistachio_defconfig
566pistachio_defconfig-y := 32r2el_defconfig BOARDS=marduk
567
568.PHONY: $(legacy_defconfigs)
569$(legacy_defconfigs):
570 $(Q)$(MAKE) -f $(srctree)/Makefile $($@-y)