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