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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. 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
17 $(Q)$(MAKE) $(build)=arch/mips/boot/tools relocs
18
19KBUILD_DEFCONFIG := 32r2el_defconfig
20KBUILD_DTBS := dtbs
21
22#
23# Select the object file format to substitute into the linker script.
24#
25ifdef CONFIG_CPU_LITTLE_ENDIAN
2632bit-tool-archpref = mipsel
2764bit-tool-archpref = mips64el
2832bit-bfd = elf32-tradlittlemips
2964bit-bfd = elf64-tradlittlemips
3032bit-emul = elf32ltsmip
3164bit-emul = elf64ltsmip
32else
3332bit-tool-archpref = mips
3464bit-tool-archpref = mips64
3532bit-bfd = elf32-tradbigmips
3664bit-bfd = elf64-tradbigmips
3732bit-emul = elf32btsmip
3864bit-emul = elf64btsmip
39endif
40
41ifdef CONFIG_32BIT
42tool-archpref = $(32bit-tool-archpref)
43UTS_MACHINE := mips
44endif
45ifdef CONFIG_64BIT
46tool-archpref = $(64bit-tool-archpref)
47UTS_MACHINE := mips64
48endif
49
50ifneq ($(SUBARCH),$(ARCH))
51 ifeq ($(CROSS_COMPILE),)
52 CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux- $(tool-archpref)-linux-gnu- $(tool-archpref)-unknown-linux-gnu-)
53 endif
54endif
55
56ifdef CONFIG_FUNCTION_GRAPH_TRACER
57 ifndef KBUILD_MCOUNT_RA_ADDRESS
58 ifeq ($(call cc-option-yn,-mmcount-ra-address), y)
59 cflags-y += -mmcount-ra-address -DKBUILD_MCOUNT_RA_ADDRESS
60 endif
61 endif
62endif
63cflags-y += $(call cc-option, -mno-check-zero-division)
64
65ifdef CONFIG_32BIT
66ld-emul = $(32bit-emul)
67vmlinux-32 = vmlinux
68vmlinux-64 = vmlinux.64
69
70cflags-y += -mabi=32
71endif
72
73ifdef CONFIG_64BIT
74ld-emul = $(64bit-emul)
75vmlinux-32 = vmlinux.32
76vmlinux-64 = vmlinux
77
78cflags-y += -mabi=64
79endif
80
81all-$(CONFIG_BOOT_ELF32) := $(vmlinux-32)
82all-$(CONFIG_BOOT_ELF64) := $(vmlinux-64)
83all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlinuz
84
85#
86# GCC uses -G 0 -mabicalls -fpic as default. We don't want PIC in the kernel
87# code since it only slows down the whole thing. At some point we might make
88# use of global pointer optimizations but their use of $28 conflicts with
89# the current pointer optimization.
90#
91# The DECStation requires an ECOFF kernel for remote booting, other MIPS
92# machines may also. Since BFD is incredibly buggy with respect to
93# crossformat linking we rely on the elf2ecoff tool for format conversion.
94#
95cflags-y += -G 0 -mno-abicalls -fno-pic -pipe
96cflags-y += -msoft-float
97LDFLAGS_vmlinux += -G 0 -static -n -nostdlib
98KBUILD_AFLAGS_MODULE += -mlong-calls
99KBUILD_CFLAGS_MODULE += -mlong-calls
100
101ifeq ($(CONFIG_RELOCATABLE),y)
102LDFLAGS_vmlinux += --emit-relocs
103endif
104
105#
106# pass -msoft-float to GAS if it supports it. However on newer binutils
107# (specifically newer than 2.24.51.20140728) we then also need to explicitly
108# set ".set hardfloat" in all files which manipulate floating point registers.
109#
110ifneq ($(call as-option,-Wa$(comma)-msoft-float,),)
111 cflags-y += -DGAS_HAS_SET_HARDFLOAT -Wa,-msoft-float
112endif
113
114cflags-y += -ffreestanding
115
116#
117# We explicitly add the endianness specifier if needed, this allows
118# to compile kernels with a toolchain for the other endianness. We
119# carefully avoid to add it redundantly because gcc 3.3/3.4 complains
120# when fed the toolchain default!
121#
122# Certain gcc versions up to gcc 4.1.1 (probably 4.2-subversion as of
123# 2006-10-10 don't properly change the predefined symbols if -EB / -EL
124# are used, so we kludge that here. A bug has been filed at
125# http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29413.
126#
127# clang doesn't suffer from these issues and our checks against -dumpmachine
128# don't work so well when cross compiling, since without providing --target
129# clang's output will be based upon the build machine. So for clang we simply
130# unconditionally specify -EB or -EL as appropriate.
131#
132ifdef CONFIG_CC_IS_CLANG
133cflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB
134cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -EL
135else
136undef-all += -UMIPSEB -U_MIPSEB -U__MIPSEB -U__MIPSEB__
137undef-all += -UMIPSEL -U_MIPSEL -U__MIPSEL -U__MIPSEL__
138predef-be += -DMIPSEB -D_MIPSEB -D__MIPSEB -D__MIPSEB__
139predef-le += -DMIPSEL -D_MIPSEL -D__MIPSEL -D__MIPSEL__
140cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' && echo -EB $(undef-all) $(predef-be))
141cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' || echo -EL $(undef-all) $(predef-le))
142endif
143
144cflags-$(CONFIG_SB1XXX_CORELIS) += $(call cc-option,-mno-sched-prolog) \
145 -fno-omit-frame-pointer
146
147# Some distribution-specific toolchains might pass the -fstack-check
148# option during the build, which adds a simple stack-probe at the beginning
149# of every function. This stack probe is to ensure that there is enough
150# stack space, else a SEGV is generated. This is not desirable for MIPS
151# as kernel stacks are small, placed in unmapped virtual memory, and do not
152# grow when overflowed. Especially on SGI IP27 platforms, this check will
153# lead to a NULL pointer dereference in _raw_spin_lock_irq.
154#
155# In disassembly, this stack probe appears at the top of a function as:
156# sd zero,<offset>(sp)
157# Where <offset> is a negative value.
158#
159cflags-y += -fno-stack-check
160
161#
162# CPU-dependent compiler/assembler options for optimization.
163#
164cflags-$(CONFIG_CPU_R3000) += -march=r3000
165cflags-$(CONFIG_CPU_TX39XX) += -march=r3900
166cflags-$(CONFIG_CPU_VR41XX) += -march=r4100 -Wa,--trap
167cflags-$(CONFIG_CPU_R4X00) += -march=r4600 -Wa,--trap
168cflags-$(CONFIG_CPU_TX49XX) += -march=r4600 -Wa,--trap
169cflags-$(CONFIG_CPU_MIPS32_R1) += -march=mips32 -Wa,--trap
170cflags-$(CONFIG_CPU_MIPS32_R2) += -march=mips32r2 -Wa,--trap
171cflags-$(CONFIG_CPU_MIPS32_R6) += -march=mips32r6 -Wa,--trap -modd-spreg
172cflags-$(CONFIG_CPU_MIPS64_R1) += -march=mips64 -Wa,--trap
173cflags-$(CONFIG_CPU_MIPS64_R2) += -march=mips64r2 -Wa,--trap
174cflags-$(CONFIG_CPU_MIPS64_R6) += -march=mips64r6 -Wa,--trap
175cflags-$(CONFIG_CPU_R5000) += -march=r5000 -Wa,--trap
176cflags-$(CONFIG_CPU_R5500) += $(call cc-option,-march=r5500,-march=r5000) \
177 -Wa,--trap
178cflags-$(CONFIG_CPU_NEVADA) += $(call cc-option,-march=rm5200,-march=r5000) \
179 -Wa,--trap
180cflags-$(CONFIG_CPU_RM7000) += $(call cc-option,-march=rm7000,-march=r5000) \
181 -Wa,--trap
182cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-march=sb1,-march=r5000) \
183 -Wa,--trap
184cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-mno-mdmx)
185cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-mno-mips3d)
186cflags-$(CONFIG_CPU_R10000) += $(call cc-option,-march=r10000,-march=r8000) \
187 -Wa,--trap
188cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += $(call cc-option,-march=octeon) -Wa,--trap
189ifeq (,$(findstring march=octeon, $(cflags-$(CONFIG_CPU_CAVIUM_OCTEON))))
190cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -Wa,-march=octeon
191endif
192cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1
193cflags-$(CONFIG_CPU_BMIPS) += -march=mips32 -Wa,-mips32 -Wa,--trap
194
195cflags-$(CONFIG_CPU_R4000_WORKAROUNDS) += $(call cc-option,-mfix-r4000,)
196cflags-$(CONFIG_CPU_R4400_WORKAROUNDS) += $(call cc-option,-mfix-r4400,)
197cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS) += $(call cc-option,-mno-daddi,)
198
199# For smartmips configurations, there are hundreds of warnings due to ISA overrides
200# in assembly and header files. smartmips is only supported for MIPS32r1 onwards
201# and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or
202# similar directives in the kernel will spam the build logs with the following warnings:
203# Warning: the `smartmips' extension requires MIPS32 revision 1 or greater
204# or
205# Warning: the 64-bit MIPS architecture does not support the `smartmips' extension
206# Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has
207# been fixed properly.
208mips-cflags := $(cflags-y)
209ifeq ($(CONFIG_CPU_HAS_SMARTMIPS),y)
210smartmips-ase := $(call cc-option-yn,$(mips-cflags) -msmartmips)
211cflags-$(smartmips-ase) += -msmartmips -Wa,--no-warn
212endif
213ifeq ($(CONFIG_CPU_MICROMIPS),y)
214micromips-ase := $(call cc-option-yn,$(mips-cflags) -mmicromips)
215cflags-$(micromips-ase) += -mmicromips
216endif
217ifeq ($(CONFIG_CPU_HAS_MSA),y)
218toolchain-msa := $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa)
219cflags-$(toolchain-msa) += -DTOOLCHAIN_SUPPORTS_MSA
220endif
221toolchain-virt := $(call cc-option-yn,$(mips-cflags) -mvirt)
222cflags-$(toolchain-virt) += -DTOOLCHAIN_SUPPORTS_VIRT
223# For -mmicromips, use -Wa,-fatal-warnings to catch unsupported -mxpa which
224# only warns
225xpa-cflags-y := $(mips-cflags)
226xpa-cflags-$(micromips-ase) += -mmicromips -Wa$(comma)-fatal-warnings
227toolchain-xpa := $(call cc-option-yn,$(xpa-cflags-y) -mxpa)
228cflags-$(toolchain-xpa) += -DTOOLCHAIN_SUPPORTS_XPA
229toolchain-crc := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mcrc)
230cflags-$(toolchain-crc) += -DTOOLCHAIN_SUPPORTS_CRC
231toolchain-dsp := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mdsp)
232cflags-$(toolchain-dsp) += -DTOOLCHAIN_SUPPORTS_DSP
233toolchain-ginv := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mginv)
234cflags-$(toolchain-ginv) += -DTOOLCHAIN_SUPPORTS_GINV
235
236#
237# Firmware support
238#
239libs-$(CONFIG_FW_ARC) += arch/mips/fw/arc
240libs-$(CONFIG_FW_CFE) += arch/mips/fw/cfe/
241libs-$(CONFIG_FW_SNIPROM) += arch/mips/fw/sni/
242libs-y += arch/mips/fw/lib/
243
244#
245# Kernel compression
246#
247ifdef CONFIG_SYS_SUPPORTS_ZBOOT
248COMPRESSION_FNAME = vmlinuz
249else
250COMPRESSION_FNAME = vmlinux
251endif
252
253#
254# Board-dependent options and extra files
255#
256include arch/mips/Kbuild.platforms
257
258ifdef CONFIG_PHYSICAL_START
259load-y = $(CONFIG_PHYSICAL_START)
260endif
261
262entry-y = $(shell $(objtree)/arch/mips/tools/elf-entry vmlinux)
263cflags-y += -I$(srctree)/arch/mips/include/asm/mach-generic
264drivers-$(CONFIG_PCI) += arch/mips/pci/
265
266#
267# Automatically detect the build format. By default we choose
268# the elf format according to the load address.
269# We can always force a build with a 64-bits symbol format by
270# passing 'KBUILD_SYM32=no' option to the make's command line.
271#
272ifdef CONFIG_64BIT
273 ifndef KBUILD_SYM32
274 ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0)
275 KBUILD_SYM32 = y
276 endif
277 endif
278
279 ifeq ($(KBUILD_SYM32)$(call cc-option-yn,-msym32), yy)
280 cflags-y += -msym32 -DKBUILD_64BIT_SYM32
281 else
282 ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
283 $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
284 endif
285 endif
286endif
287
288KBUILD_AFLAGS += $(cflags-y)
289KBUILD_CFLAGS += $(cflags-y)
290KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y)
291KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
292
293bootvars-y = VMLINUX_LOAD_ADDRESS=$(load-y) \
294 VMLINUX_ENTRY_ADDRESS=$(entry-y) \
295 PLATFORM="$(platform-y)" \
296 ITS_INPUTS="$(its-y)"
297ifdef CONFIG_32BIT
298bootvars-y += ADDR_BITS=32
299endif
300ifdef CONFIG_64BIT
301bootvars-y += ADDR_BITS=64
302endif
303
304# This is required to get dwarf unwinding tables into .debug_frame
305# instead of .eh_frame so we don't discard them.
306KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
307
308KBUILD_LDFLAGS += -m $(ld-emul)
309
310ifdef CONFIG_MIPS
311CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
312 egrep -vw '__GNUC_(|MINOR_|PATCHLEVEL_)_' | \
313 sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
314endif
315
316OBJCOPYFLAGS += --remove-section=.reginfo
317
318head-y := arch/mips/kernel/head.o
319
320libs-y += arch/mips/lib/
321libs-$(CONFIG_MIPS_FP_SUPPORT) += arch/mips/math-emu/
322
323# See arch/mips/Kbuild for content of core part of the kernel
324core-y += arch/mips/
325
326drivers-$(CONFIG_MIPS_CRC_SUPPORT) += arch/mips/crypto/
327drivers-$(CONFIG_OPROFILE) += arch/mips/oprofile/
328
329# suspend and hibernation support
330drivers-$(CONFIG_PM) += arch/mips/power/
331
332# boot image targets (arch/mips/boot/)
333boot-y := vmlinux.bin
334boot-y += vmlinux.ecoff
335boot-y += vmlinux.srec
336ifeq ($(shell expr $(load-y) \< 0xffffffff80000000 2> /dev/null), 0)
337boot-y += uImage
338boot-y += uImage.bin
339boot-y += uImage.bz2
340boot-y += uImage.gz
341boot-y += uImage.lzma
342boot-y += uImage.lzo
343endif
344boot-y += vmlinux.itb
345boot-y += vmlinux.gz.itb
346boot-y += vmlinux.bz2.itb
347boot-y += vmlinux.lzma.itb
348boot-y += vmlinux.lzo.itb
349
350# compressed boot image targets (arch/mips/boot/compressed/)
351bootz-y := vmlinuz
352bootz-y += vmlinuz.bin
353bootz-y += vmlinuz.ecoff
354bootz-y += vmlinuz.srec
355ifeq ($(shell expr $(zload-y) \< 0xffffffff80000000 2> /dev/null), 0)
356bootz-y += uzImage.bin
357endif
358
359ifdef CONFIG_LASAT
360rom.bin rom.sw: vmlinux
361 $(Q)$(MAKE) $(build)=arch/mips/lasat/image \
362 $(bootvars-y) $@
363endif
364
365#
366# Some machines like the Indy need 32-bit ELF binaries for booting purposes.
367# Other need ECOFF, so we build a 32-bit ELF binary for them which we then
368# convert to ECOFF using elf2ecoff.
369#
370quiet_cmd_32 = OBJCOPY $@
371 cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
372vmlinux.32: vmlinux
373 $(call cmd,32)
374
375#
376# The 64-bit ELF tools are pretty broken so at this time we generate 64-bit
377# ELF files from 32-bit files by conversion.
378#
379quiet_cmd_64 = OBJCOPY $@
380 cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@
381vmlinux.64: vmlinux
382 $(call cmd,64)
383
384all: $(all-y) $(KBUILD_DTBS)
385
386# boot
387$(boot-y): $(vmlinux-32) FORCE
388 $(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \
389 $(bootvars-y) arch/mips/boot/$@
390
391ifdef CONFIG_SYS_SUPPORTS_ZBOOT
392# boot/compressed
393$(bootz-y): $(vmlinux-32) FORCE
394 $(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
395 $(bootvars-y) 32bit-bfd=$(32bit-bfd) $@
396else
397vmlinuz: FORCE
398 @echo ' CONFIG_SYS_SUPPORTS_ZBOOT is not enabled'
399 /bin/false
400endif
401
402
403CLEAN_FILES += vmlinux.32 vmlinux.64
404
405# device-trees
406core-y += arch/mips/boot/dts/
407
408archprepare:
409ifdef CONFIG_MIPS32_N32
410 @$(kecho) ' Checking missing-syscalls for N32'
411 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32"
412endif
413ifdef CONFIG_MIPS32_O32
414 @$(kecho) ' Checking missing-syscalls for O32'
415 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32"
416endif
417
418install:
419 $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
420ifdef CONFIG_SYS_SUPPORTS_ZBOOT
421 $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
422endif
423 $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
424 $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
425
426archclean:
427 $(Q)$(MAKE) $(clean)=arch/mips/boot
428 $(Q)$(MAKE) $(clean)=arch/mips/boot/compressed
429 $(Q)$(MAKE) $(clean)=arch/mips/boot/tools
430 $(Q)$(MAKE) $(clean)=arch/mips/lasat
431
432archheaders:
433 $(Q)$(MAKE) $(build)=arch/mips/kernel/syscalls all
434
435define archhelp
436 echo ' install - install kernel into $(INSTALL_PATH)'
437 echo ' vmlinux.ecoff - ECOFF boot image'
438 echo ' vmlinux.bin - Raw binary boot image'
439 echo ' vmlinux.srec - SREC boot image'
440 echo ' vmlinux.32 - 64-bit boot image wrapped in 32bits (IP22/IP32)'
441 echo ' vmlinuz - Compressed boot(zboot) image'
442 echo ' vmlinuz.ecoff - ECOFF zboot image'
443 echo ' vmlinuz.bin - Raw binary zboot image'
444 echo ' vmlinuz.srec - SREC zboot image'
445 echo ' uImage - U-Boot image'
446 echo ' uImage.bin - U-Boot image (uncompressed)'
447 echo ' uImage.bz2 - U-Boot image (bz2)'
448 echo ' uImage.gz - U-Boot image (gzip)'
449 echo ' uImage.lzma - U-Boot image (lzma)'
450 echo ' uImage.lzo - U-Boot image (lzo)'
451 echo ' uzImage.bin - U-Boot image (self-extracting)'
452 echo
453 echo ' These will be default as appropriate for a configured platform.'
454 echo
455 echo ' If you are targeting a system supported by generic kernels you may'
456 echo ' configure the kernel for a given architecture target like so:'
457 echo
458 echo ' {micro32,32,64}{r1,r2,r6}{el,}_defconfig <BOARDS="list of boards">'
459 echo
460 echo ' Where BOARDS is some subset of the following:'
461 for board in $(sort $(BOARDS)); do echo " $${board}"; done
462 echo
463 echo ' Specifically the following generic default configurations are'
464 echo ' supported:'
465 echo
466 $(foreach cfg,$(generic_defconfigs),
467 printf " %-24s - Build generic kernel for $(call describe_generic_defconfig,$(cfg))\n" $(cfg);)
468 echo
469 echo ' The following legacy default configurations have been converted to'
470 echo ' generic and can still be used:'
471 echo
472 $(foreach cfg,$(sort $(legacy_defconfigs)),
473 printf " %-24s - Build $($(cfg)-y)\n" $(cfg);)
474 echo
475 echo ' Otherwise, the following default configurations are available:'
476endef
477
478generic_config_dir = $(srctree)/arch/$(ARCH)/configs/generic
479generic_defconfigs :=
480
481#
482# If the user generates a generic kernel configuration without specifying a
483# list of boards to include the config fragments for, default to including all
484# available board config fragments.
485#
486ifeq ($(BOARDS),)
487BOARDS = $(patsubst board-%.config,%,$(notdir $(wildcard $(generic_config_dir)/board-*.config)))
488endif
489
490#
491# Generic kernel configurations which merge generic_defconfig with the
492# appropriate config fragments from arch/mips/configs/generic/, resulting in
493# the ability to easily configure the kernel for a given architecture,
494# endianness & set of boards without duplicating the needed configuration in
495# hundreds of defconfig files.
496#
497define gen_generic_defconfigs
498$(foreach bits,$(1),$(foreach rev,$(2),$(foreach endian,$(3),
499target := $(bits)$(rev)$(filter el,$(endian))_defconfig
500generic_defconfigs += $$(target)
501$$(target): $(generic_config_dir)/$(bits)$(rev).config
502$$(target): $(generic_config_dir)/$(endian).config
503)))
504endef
505
506$(eval $(call gen_generic_defconfigs,32 64,r1 r2 r6,eb el))
507$(eval $(call gen_generic_defconfigs,micro32,r2,eb el))
508
509define describe_generic_defconfig
510$(subst 32r,MIPS32 r,$(subst 64r,MIPS64 r,$(subst el, little endian,$(patsubst %_defconfig,%,$(1)))))
511endef
512
513.PHONY: $(generic_defconfigs)
514$(generic_defconfigs):
515 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
516 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/generic_defconfig $^ | \
517 grep -Ev '^#'
518 $(Q)cp $(KCONFIG_CONFIG) $(objtree)/.config.$@
519 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig \
520 KCONFIG_CONFIG=$(objtree)/.config.$@ >/dev/null
521 $(Q)$(CONFIG_SHELL) $(srctree)/arch/$(ARCH)/tools/generic-board-config.sh \
522 $(srctree) $(objtree) $(objtree)/.config.$@ $(KCONFIG_CONFIG) \
523 "$(origin BOARDS)" $(BOARDS)
524 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
525
526#
527# Prevent generic merge_config rules attempting to merge single fragments
528#
529$(generic_config_dir)/%.config: ;
530
531#
532# Prevent direct use of generic_defconfig, which is intended to be used as the
533# basis of the various ISA-specific targets generated above.
534#
535.PHONY: generic_defconfig
536generic_defconfig:
537 $(Q)echo "generic_defconfig is not intended for direct use, but should instead be"
538 $(Q)echo "used via an ISA-specific target from the following list:"
539 $(Q)echo
540 $(Q)for cfg in $(generic_defconfigs); do echo " $${cfg}"; done
541 $(Q)echo
542 $(Q)false
543
544#
545# Legacy defconfig compatibility - these targets used to be real defconfigs but
546# now that the boards have been converted to use the generic kernel they are
547# wrappers around the generic rules above.
548#
549legacy_defconfigs += ocelot_defconfig
550ocelot_defconfig-y := 32r2el_defconfig BOARDS=ocelot
551
552legacy_defconfigs += sead3_defconfig
553sead3_defconfig-y := 32r2el_defconfig BOARDS=sead-3
554
555legacy_defconfigs += sead3micro_defconfig
556sead3micro_defconfig-y := micro32r2el_defconfig BOARDS=sead-3
557
558legacy_defconfigs += xilfpga_defconfig
559xilfpga_defconfig-y := 32r2el_defconfig BOARDS=xilfpga
560
561.PHONY: $(legacy_defconfigs)
562$(legacy_defconfigs):
563 $(Q)$(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/boot/tools relocs
17
18KBUILD_DEFCONFIG := ip22_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) += $(call cc-option,-mno-sched-prolog) \
133 -fno-omit-frame-pointer
134#
135# CPU-dependent compiler/assembler options for optimization.
136#
137cflags-$(CONFIG_CPU_R3000) += -march=r3000
138cflags-$(CONFIG_CPU_TX39XX) += -march=r3900
139cflags-$(CONFIG_CPU_R6000) += -march=r6000 -Wa,--trap
140cflags-$(CONFIG_CPU_R4300) += -march=r4300 -Wa,--trap
141cflags-$(CONFIG_CPU_VR41XX) += -march=r4100 -Wa,--trap
142cflags-$(CONFIG_CPU_R4X00) += -march=r4600 -Wa,--trap
143cflags-$(CONFIG_CPU_TX49XX) += -march=r4600 -Wa,--trap
144cflags-$(CONFIG_CPU_MIPS32_R1) += $(call cc-option,-march=mips32,-mips32 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
145 -Wa,-mips32 -Wa,--trap
146cflags-$(CONFIG_CPU_MIPS32_R2) += $(call cc-option,-march=mips32r2,-mips32r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
147 -Wa,-mips32r2 -Wa,--trap
148cflags-$(CONFIG_CPU_MIPS32_R6) += -march=mips32r6 -Wa,--trap
149cflags-$(CONFIG_CPU_MIPS64_R1) += $(call cc-option,-march=mips64,-mips64 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
150 -Wa,-mips64 -Wa,--trap
151cflags-$(CONFIG_CPU_MIPS64_R2) += $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
152 -Wa,-mips64r2 -Wa,--trap
153cflags-$(CONFIG_CPU_MIPS64_R6) += -march=mips64r6 -Wa,--trap
154cflags-$(CONFIG_CPU_R5000) += -march=r5000 -Wa,--trap
155cflags-$(CONFIG_CPU_R5432) += $(call cc-option,-march=r5400,-march=r5000) \
156 -Wa,--trap
157cflags-$(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_R8000) += -march=r8000 -Wa,--trap
168cflags-$(CONFIG_CPU_R10000) += $(call cc-option,-march=r10000,-march=r8000) \
169 -Wa,--trap
170cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += $(call cc-option,-march=octeon) -Wa,--trap
171ifeq (,$(findstring march=octeon, $(cflags-$(CONFIG_CPU_CAVIUM_OCTEON))))
172cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -Wa,-march=octeon
173endif
174cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1
175cflags-$(CONFIG_CPU_BMIPS) += -march=mips32 -Wa,-mips32 -Wa,--trap
176
177cflags-$(CONFIG_CPU_R4000_WORKAROUNDS) += $(call cc-option,-mfix-r4000,)
178cflags-$(CONFIG_CPU_R4400_WORKAROUNDS) += $(call cc-option,-mfix-r4400,)
179cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS) += $(call cc-option,-mno-daddi,)
180
181# For smartmips configurations, there are hundreds of warnings due to ISA overrides
182# in assembly and header files. smartmips is only supported for MIPS32r1 onwards
183# and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or
184# similar directives in the kernel will spam the build logs with the following warnings:
185# Warning: the `smartmips' extension requires MIPS32 revision 1 or greater
186# or
187# Warning: the 64-bit MIPS architecture does not support the `smartmips' extension
188# Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has
189# been fixed properly.
190mips-cflags := $(cflags-y)
191ifeq ($(CONFIG_CPU_HAS_SMARTMIPS),y)
192smartmips-ase := $(call cc-option-yn,$(mips-cflags) -msmartmips)
193cflags-$(smartmips-ase) += -msmartmips -Wa,--no-warn
194endif
195ifeq ($(CONFIG_CPU_MICROMIPS),y)
196micromips-ase := $(call cc-option-yn,$(mips-cflags) -mmicromips)
197cflags-$(micromips-ase) += -mmicromips
198endif
199ifeq ($(CONFIG_CPU_HAS_MSA),y)
200toolchain-msa := $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa)
201cflags-$(toolchain-msa) += -DTOOLCHAIN_SUPPORTS_MSA
202endif
203toolchain-virt := $(call cc-option-yn,$(mips-cflags) -mvirt)
204cflags-$(toolchain-virt) += -DTOOLCHAIN_SUPPORTS_VIRT
205
206#
207# Firmware support
208#
209libs-$(CONFIG_FW_ARC) += arch/mips/fw/arc
210libs-$(CONFIG_FW_CFE) += arch/mips/fw/cfe/
211libs-$(CONFIG_FW_SNIPROM) += arch/mips/fw/sni/
212libs-y += arch/mips/fw/lib/
213
214#
215# Kernel compression
216#
217ifdef SYS_SUPPORTS_ZBOOT
218COMPRESSION_FNAME = vmlinuz
219else
220COMPRESSION_FNAME = vmlinux
221endif
222
223#
224# Board-dependent options and extra files
225#
226include arch/mips/Kbuild.platforms
227
228ifdef CONFIG_PHYSICAL_START
229load-y = $(CONFIG_PHYSICAL_START)
230endif
231entry-y = 0x$(shell $(NM) vmlinux 2>/dev/null \
232 | grep "\bkernel_entry\b" | cut -f1 -d \ )
233
234cflags-y += -I$(srctree)/arch/mips/include/asm/mach-generic
235drivers-$(CONFIG_PCI) += arch/mips/pci/
236
237#
238# Automatically detect the build format. By default we choose
239# the elf format according to the load address.
240# We can always force a build with a 64-bits symbol format by
241# passing 'KBUILD_SYM32=no' option to the make's command line.
242#
243ifdef CONFIG_64BIT
244 ifndef KBUILD_SYM32
245 ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0)
246 KBUILD_SYM32 = y
247 endif
248 endif
249
250 ifeq ($(KBUILD_SYM32)$(call cc-option-yn,-msym32), yy)
251 cflags-y += -msym32 -DKBUILD_64BIT_SYM32
252 else
253 ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
254 $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
255 endif
256 endif
257endif
258
259KBUILD_AFLAGS += $(cflags-y)
260KBUILD_CFLAGS += $(cflags-y)
261KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y)
262KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
263
264bootvars-y = VMLINUX_LOAD_ADDRESS=$(load-y) \
265 VMLINUX_ENTRY_ADDRESS=$(entry-y) \
266 PLATFORM="$(platform-y)"
267ifdef CONFIG_32BIT
268bootvars-y += ADDR_BITS=32
269endif
270ifdef CONFIG_64BIT
271bootvars-y += ADDR_BITS=64
272endif
273
274LDFLAGS += -m $(ld-emul)
275
276ifdef CONFIG_MIPS
277CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
278 egrep -vw '__GNUC_(|MINOR_|PATCHLEVEL_)_' | \
279 sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
280ifdef CONFIG_64BIT
281CHECKFLAGS += -m64
282endif
283endif
284
285OBJCOPYFLAGS += --remove-section=.reginfo
286
287head-y := arch/mips/kernel/head.o
288
289libs-y += arch/mips/lib/
290libs-y += arch/mips/math-emu/
291
292# See arch/mips/Kbuild for content of core part of the kernel
293core-y += arch/mips/
294
295drivers-$(CONFIG_OPROFILE) += arch/mips/oprofile/
296
297# suspend and hibernation support
298drivers-$(CONFIG_PM) += arch/mips/power/
299
300# boot image targets (arch/mips/boot/)
301boot-y := vmlinux.bin
302boot-y += vmlinux.ecoff
303boot-y += vmlinux.srec
304ifeq ($(shell expr $(load-y) \< 0xffffffff80000000 2> /dev/null), 0)
305boot-y += uImage
306boot-y += uImage.bin
307boot-y += uImage.bz2
308boot-y += uImage.gz
309boot-y += uImage.lzma
310boot-y += uImage.lzo
311endif
312boot-y += vmlinux.itb
313boot-y += vmlinux.gz.itb
314boot-y += vmlinux.bz2.itb
315boot-y += vmlinux.lzma.itb
316boot-y += vmlinux.lzo.itb
317
318# compressed boot image targets (arch/mips/boot/compressed/)
319bootz-y := vmlinuz
320bootz-y += vmlinuz.bin
321bootz-y += vmlinuz.ecoff
322bootz-y += vmlinuz.srec
323
324ifdef CONFIG_LASAT
325rom.bin rom.sw: vmlinux
326 $(Q)$(MAKE) $(build)=arch/mips/lasat/image \
327 $(bootvars-y) $@
328endif
329
330CMD_RELOCS = arch/mips/boot/tools/relocs
331quiet_cmd_relocs = RELOCS $<
332 cmd_relocs = $(CMD_RELOCS) $<
333
334#
335# Some machines like the Indy need 32-bit ELF binaries for booting purposes.
336# Other need ECOFF, so we build a 32-bit ELF binary for them which we then
337# convert to ECOFF using elf2ecoff.
338#
339quiet_cmd_32 = OBJCOPY $@
340 cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
341vmlinux.32: vmlinux
342ifeq ($(CONFIG_RELOCATABLE)$(CONFIG_64BIT),yy)
343# Currently, objcopy fails to handle the relocations in the elf64
344# So the relocs tool must be run here to remove them first
345 $(call cmd,relocs)
346endif
347 $(call cmd,32)
348
349#
350# The 64-bit ELF tools are pretty broken so at this time we generate 64-bit
351# ELF files from 32-bit files by conversion.
352#
353quiet_cmd_64 = OBJCOPY $@
354 cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@
355vmlinux.64: vmlinux
356 $(call cmd,64)
357
358all: $(all-y)
359
360# boot
361$(boot-y): $(vmlinux-32) FORCE
362ifeq ($(CONFIG_RELOCATABLE)$(CONFIG_32BIT),yy)
363 $(call cmd,relocs)
364endif
365 $(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \
366 $(bootvars-y) arch/mips/boot/$@
367
368ifdef CONFIG_SYS_SUPPORTS_ZBOOT
369# boot/compressed
370$(bootz-y): $(vmlinux-32) FORCE
371 $(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
372 $(bootvars-y) 32bit-bfd=$(32bit-bfd) $@
373else
374vmlinuz: FORCE
375 @echo ' CONFIG_SYS_SUPPORTS_ZBOOT is not enabled'
376 /bin/false
377endif
378
379
380CLEAN_FILES += vmlinux.32 vmlinux.64
381
382# device-trees
383core-$(CONFIG_BUILTIN_DTB) += arch/mips/boot/dts/
384
385%.dtb %.dtb.S %.dtb.o: | scripts
386 $(Q)$(MAKE) $(build)=arch/mips/boot/dts arch/mips/boot/dts/$@
387
388PHONY += dtbs
389dtbs: scripts
390 $(Q)$(MAKE) $(build)=arch/mips/boot/dts
391
392PHONY += dtbs_install
393dtbs_install:
394 $(Q)$(MAKE) $(dtbinst)=arch/mips/boot/dts
395
396archprepare:
397ifdef CONFIG_MIPS32_N32
398 @echo ' Checking missing-syscalls for N32'
399 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32"
400endif
401ifdef CONFIG_MIPS32_O32
402 @echo ' Checking missing-syscalls for O32'
403 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32"
404endif
405
406install:
407 $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
408ifdef CONFIG_SYS_SUPPORTS_ZBOOT
409 $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
410endif
411 $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
412 $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
413
414archclean:
415 $(Q)$(MAKE) $(clean)=arch/mips/boot
416 $(Q)$(MAKE) $(clean)=arch/mips/boot/compressed
417 $(Q)$(MAKE) $(clean)=arch/mips/boot/tools
418 $(Q)$(MAKE) $(clean)=arch/mips/lasat
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 ' dtbs - Device-tree blobs for enabled boards'
437 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'
438 echo
439 echo ' These will be default as appropriate for a configured platform.'
440 echo
441 echo ' If you are targeting a system supported by generic kernels you may'
442 echo ' configure the kernel for a given architecture target like so:'
443 echo
444 echo ' {micro32,32,64}{r1,r2,r6}{el,}_defconfig <BOARDS="list of boards">'
445 echo
446 echo ' Otherwise, the following default configurations are available:'
447endef
448
449generic_config_dir = $(srctree)/arch/$(ARCH)/configs/generic
450generic_defconfigs :=
451
452#
453# If the user generates a generic kernel configuration without specifying a
454# list of boards to include the config fragments for, default to including all
455# available board config fragments.
456#
457ifeq ($(BOARDS),)
458BOARDS = $(patsubst board-%.config,%,$(notdir $(wildcard $(generic_config_dir)/board-*.config)))
459endif
460
461#
462# Generic kernel configurations which merge generic_defconfig with the
463# appropriate config fragments from arch/mips/configs/generic/, resulting in
464# the ability to easily configure the kernel for a given architecture,
465# endianness & set of boards without duplicating the needed configuration in
466# hundreds of defconfig files.
467#
468define gen_generic_defconfigs
469$(foreach bits,$(1),$(foreach rev,$(2),$(foreach endian,$(3),
470target := $(bits)$(rev)$(filter el,$(endian))_defconfig
471generic_defconfigs += $$(target)
472$$(target): $(generic_config_dir)/$(bits)$(rev).config
473$$(target): $(generic_config_dir)/$(endian).config
474)))
475endef
476
477$(eval $(call gen_generic_defconfigs,32 64,r1 r2 r6,eb el))
478$(eval $(call gen_generic_defconfigs,micro32,r2,eb el))
479
480.PHONY: $(generic_defconfigs)
481$(generic_defconfigs):
482 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
483 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/generic_defconfig $^ \
484 $(foreach board,$(BOARDS),$(generic_config_dir)/board-$(board).config)
485 $(Q)$(MAKE) olddefconfig
486
487#
488# Prevent generic merge_config rules attempting to merge single fragments
489#
490$(generic_config_dir)/%.config: ;
491
492#
493# Legacy defconfig compatibility - these targets used to be real defconfigs but
494# now that the boards have been converted to use the generic kernel they are
495# wrappers around the generic rules above.
496#
497.PHONY: sead3_defconfig
498sead3_defconfig:
499 $(Q)$(MAKE) 32r2el_defconfig BOARDS=sead-3
500
501.PHONY: sead3micro_defconfig
502sead3micro_defconfig:
503 $(Q)$(MAKE) micro32r2el_defconfig BOARDS=sead-3