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 $28 conflicts with 91# the current pointer optimization. 92# 93# The DECStation requires an ECOFF kernel for remote booting, other MIPS 94# machines may also. Since BFD is incredibly buggy with respect to 95# crossformat linking we rely on the elf2ecoff tool for format conversion. 96# 97cflags-y += -G 0 -mno-abicalls -fno-pic -pipe 98cflags-y += -msoft-float -Wa,-msoft-float 99LDFLAGS_vmlinux += -G 0 -static -n -nostdlib 100KBUILD_AFLAGS_MODULE += -mlong-calls 101KBUILD_CFLAGS_MODULE += -mlong-calls 102 103ifeq ($(CONFIG_RELOCATABLE),y) 104LDFLAGS_vmlinux += --emit-relocs 105endif 106 107cflags-y += -ffreestanding 108 109cflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB 110cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -EL 111 112cflags-$(CONFIG_SB1XXX_CORELIS) += $(call cc-option,-mno-sched-prolog) \ 113 -fno-omit-frame-pointer 114 115# Some distribution-specific toolchains might pass the -fstack-check 116# option during the build, which adds a simple stack-probe at the beginning 117# of every function. This stack probe is to ensure that there is enough 118# stack space, else a SEGV is generated. This is not desirable for MIPS 119# as kernel stacks are small, placed in unmapped virtual memory, and do not 120# grow when overflowed. Especially on SGI IP27 platforms, this check will 121# lead to a NULL pointer dereference in _raw_spin_lock_irq. 122# 123# In disassembly, this stack probe appears at the top of a function as: 124# sd zero,<offset>(sp) 125# Where <offset> is a negative value. 126# 127cflags-y += -fno-stack-check 128 129# binutils from v2.35 when built with --enable-mips-fix-loongson3-llsc=yes, 130# supports an -mfix-loongson3-llsc flag which emits a sync prior to each ll 131# instruction to work around a CPU bug (see __SYNC_loongson3_war in asm/sync.h 132# for a description). 133# 134# We disable this in order to prevent the assembler meddling with the 135# instruction that labels refer to, ie. if we label an ll instruction: 136# 137# 1: ll v0, 0(a0) 138# 139# ...then with the assembler fix applied the label may actually point at a sync 140# instruction inserted by the assembler, and if we were using the label in an 141# exception table the table would no longer contain the address of the ll 142# instruction. 143# 144# Avoid this by explicitly disabling that assembler behaviour. 145# 146cflags-y += $(call cc-option,-Wa$(comma)-mno-fix-loongson3-llsc,) 147 148# 149# CPU-dependent compiler/assembler options for optimization. 150# 151cflags-$(CONFIG_CPU_R3000) += -march=r3000 152cflags-$(CONFIG_CPU_R4300) += -march=r4300 -Wa,--trap 153cflags-$(CONFIG_CPU_R4X00) += -march=r4600 -Wa,--trap 154cflags-$(CONFIG_CPU_TX49XX) += -march=r4600 -Wa,--trap 155cflags-$(CONFIG_CPU_MIPS32_R1) += -march=mips32 -Wa,--trap 156cflags-$(CONFIG_CPU_MIPS32_R2) += -march=mips32r2 -Wa,--trap 157cflags-$(CONFIG_CPU_MIPS32_R5) += -march=mips32r5 -Wa,--trap -modd-spreg 158cflags-$(CONFIG_CPU_MIPS32_R6) += -march=mips32r6 -Wa,--trap -modd-spreg 159cflags-$(CONFIG_CPU_MIPS64_R1) += -march=mips64 -Wa,--trap 160cflags-$(CONFIG_CPU_MIPS64_R2) += -march=mips64r2 -Wa,--trap 161cflags-$(CONFIG_CPU_MIPS64_R5) += -march=mips64r5 -Wa,--trap 162cflags-$(CONFIG_CPU_MIPS64_R6) += -march=mips64r6 -Wa,--trap 163cflags-$(CONFIG_CPU_P5600) += -march=p5600 -Wa,--trap -modd-spreg 164cflags-$(CONFIG_CPU_R5000) += -march=r5000 -Wa,--trap 165cflags-$(CONFIG_CPU_R5500) += $(call cc-option,-march=r5500,-march=r5000) \ 166 -Wa,--trap 167cflags-$(CONFIG_CPU_NEVADA) += $(call cc-option,-march=rm5200,-march=r5000) \ 168 -Wa,--trap 169cflags-$(CONFIG_CPU_RM7000) += $(call cc-option,-march=rm7000,-march=r5000) \ 170 -Wa,--trap 171cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-march=sb1,-march=r5000) \ 172 -Wa,--trap 173cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-mno-mdmx) 174cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-mno-mips3d) 175cflags-$(CONFIG_CPU_R10000) += $(call cc-option,-march=r10000,-march=r8000) \ 176 -Wa,--trap 177cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -march=octeon -Wa,--trap 178cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1 179cflags-$(CONFIG_CPU_BMIPS) += -march=mips32 -Wa,-mips32 -Wa,--trap 180 181cflags-$(CONFIG_CPU_LOONGSON2E) += -march=loongson2e -Wa,--trap 182cflags-$(CONFIG_CPU_LOONGSON2F) += -march=loongson2f -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) += $(call cc-option,-mno-loongson-mmi) 186ifdef CONFIG_CPU_LOONGSON64 187cflags-$(CONFIG_CPU_LOONGSON64) += -Wa,--trap 188cflags-$(CONFIG_CC_IS_GCC) += -march=loongson3a 189cflags-$(CONFIG_CC_IS_CLANG) += -march=mips64r2 190endif 191cflags-$(CONFIG_CPU_LOONGSON64) += $(call cc-option,-mno-loongson-mmi) 192 193cflags-$(CONFIG_CPU_R4000_WORKAROUNDS) += $(call cc-option,-mfix-r4000,) 194cflags-$(CONFIG_CPU_R4400_WORKAROUNDS) += $(call cc-option,-mfix-r4400,) 195cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS) += $(call cc-option,-mno-daddi,) 196ifdef CONFIG_CPU_LOONGSON2F_WORKAROUNDS 197cflags-$(CONFIG_CPU_NOP_WORKAROUNDS) += -Wa,-mfix-loongson2f-nop 198cflags-$(CONFIG_CPU_JUMP_WORKAROUNDS) += -Wa,-mfix-loongson2f-jump 199endif 200 201# 202# Some versions of binutils, not currently mainline as of 2019/02/04, support 203# an -mfix-loongson3-llsc flag which emits a sync prior to each ll instruction 204# to work around a CPU bug (see __SYNC_loongson3_war in asm/sync.h for a 205# description). 206# 207# We disable this in order to prevent the assembler meddling with the 208# instruction that labels refer to, ie. if we label an ll instruction: 209# 210# 1: ll v0, 0(a0) 211# 212# ...then with the assembler fix applied the label may actually point at a sync 213# instruction inserted by the assembler, and if we were using the label in an 214# exception table the table would no longer contain the address of the ll 215# instruction. 216# 217# Avoid this by explicitly disabling that assembler behaviour. If upstream 218# binutils does not merge support for the flag then we can revisit & remove 219# this later - for now it ensures vendor toolchains don't cause problems. 220# 221cflags-$(CONFIG_CPU_LOONGSON64) += $(call as-option,-Wa$(comma)-mno-fix-loongson3-llsc,) 222 223# For smartmips configurations, there are hundreds of warnings due to ISA overrides 224# in assembly and header files. smartmips is only supported for MIPS32r1 onwards 225# and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or 226# similar directives in the kernel will spam the build logs with the following warnings: 227# Warning: the `smartmips' extension requires MIPS32 revision 1 or greater 228# or 229# Warning: the 64-bit MIPS architecture does not support the `smartmips' extension 230# Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has 231# been fixed properly. 232mips-cflags := $(cflags-y) 233ifeq ($(CONFIG_CPU_HAS_SMARTMIPS),y) 234smartmips-ase := $(call cc-option-yn,$(mips-cflags) -msmartmips) 235cflags-$(smartmips-ase) += -msmartmips -Wa,--no-warn 236endif 237ifeq ($(CONFIG_CPU_MICROMIPS),y) 238micromips-ase := $(call cc-option-yn,$(mips-cflags) -mmicromips) 239cflags-$(micromips-ase) += -mmicromips 240endif 241ifeq ($(CONFIG_CPU_HAS_MSA),y) 242toolchain-msa := $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa) 243cflags-$(toolchain-msa) += -DTOOLCHAIN_SUPPORTS_MSA 244endif 245toolchain-virt := $(call cc-option-yn,$(mips-cflags) -mvirt) 246cflags-$(toolchain-virt) += -DTOOLCHAIN_SUPPORTS_VIRT 247# For -mmicromips, use -Wa,-fatal-warnings to catch unsupported -mxpa which 248# only warns 249xpa-cflags-y := $(mips-cflags) 250xpa-cflags-$(micromips-ase) += -mmicromips -Wa$(comma)-fatal-warnings 251toolchain-xpa := $(call cc-option-yn,$(xpa-cflags-y) -mxpa) 252cflags-$(toolchain-xpa) += -DTOOLCHAIN_SUPPORTS_XPA 253toolchain-crc := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mcrc) 254cflags-$(toolchain-crc) += -DTOOLCHAIN_SUPPORTS_CRC 255toolchain-dsp := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mdsp) 256cflags-$(toolchain-dsp) += -DTOOLCHAIN_SUPPORTS_DSP 257toolchain-ginv := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mginv) 258cflags-$(toolchain-ginv) += -DTOOLCHAIN_SUPPORTS_GINV 259 260# 261# Firmware support 262# 263libs-$(CONFIG_FW_ARC) += arch/mips/fw/arc/ 264libs-$(CONFIG_FW_CFE) += arch/mips/fw/cfe/ 265libs-$(CONFIG_FW_SNIPROM) += arch/mips/fw/sni/ 266libs-y += arch/mips/fw/lib/ 267 268# 269# Kernel compression 270# 271ifdef CONFIG_SYS_SUPPORTS_ZBOOT 272COMPRESSION_FNAME = vmlinuz 273else 274COMPRESSION_FNAME = vmlinux 275endif 276 277# 278# Board-dependent options and extra files 279# 280include $(srctree)/arch/mips/Kbuild.platforms 281 282ifdef CONFIG_PHYSICAL_START 283load-y = $(CONFIG_PHYSICAL_START) 284endif 285 286entry-y = $(shell $(objtree)/arch/mips/tools/elf-entry vmlinux) 287cflags-y += -I$(srctree)/arch/mips/include/asm/mach-generic 288drivers-$(CONFIG_PCI) += arch/mips/pci/ 289 290# 291# Automatically detect the build format. By default we choose 292# the elf format according to the load address. 293# We can always force a build with a 64-bits symbol format by 294# passing 'KBUILD_SYM32=no' option to the make's command line. 295# 296ifdef CONFIG_64BIT 297 ifndef KBUILD_SYM32 298 ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0) 299 KBUILD_SYM32 = $(call cc-option-yn, -msym32) 300 endif 301 endif 302 303 ifeq ($(KBUILD_SYM32), y) 304 cflags-$(KBUILD_SYM32) += -msym32 -DKBUILD_64BIT_SYM32 305 else 306 ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y) 307 $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32) 308 endif 309 endif 310endif 311 312# When linking a 32-bit executable the LLVM linker cannot cope with a 313# 32-bit load address that has been sign-extended to 64 bits. Simply 314# remove the upper 32 bits then, as it is safe to do so with other 315# linkers. 316ifdef CONFIG_64BIT 317 load-ld = $(load-y) 318else 319 load-ld = $(subst 0xffffffff,0x,$(load-y)) 320endif 321 322KBUILD_AFLAGS += $(cflags-y) 323KBUILD_CFLAGS += $(cflags-y) 324KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y) -DLINKER_LOAD_ADDRESS=$(load-ld) 325KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0) 326 327bootvars-y = VMLINUX_LOAD_ADDRESS=$(load-y) \ 328 LINKER_LOAD_ADDRESS=$(load-ld) \ 329 VMLINUX_ENTRY_ADDRESS=$(entry-y) \ 330 PLATFORM="$(platform-y)" \ 331 ITS_INPUTS="$(its-y)" 332ifdef CONFIG_32BIT 333bootvars-y += ADDR_BITS=32 334endif 335ifdef CONFIG_64BIT 336bootvars-y += ADDR_BITS=64 337endif 338 339# This is required to get dwarf unwinding tables into .debug_frame 340# instead of .eh_frame so we don't discard them. 341KBUILD_CFLAGS += -fno-asynchronous-unwind-tables 342 343KBUILD_LDFLAGS += -m $(ld-emul) 344 345ifdef need-compiler 346CHECKFLAGS += $(shell $(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \ 347 grep -E -vw '__GNUC_(MINOR_|PATCHLEVEL_)?_' | \ 348 sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g') 349endif 350 351OBJCOPYFLAGS += --remove-section=.reginfo 352 353libs-y += arch/mips/lib/ 354libs-$(CONFIG_MIPS_FP_SUPPORT) += arch/mips/math-emu/ 355 356drivers-y += arch/mips/crypto/ 357 358# suspend and hibernation support 359drivers-$(CONFIG_PM) += arch/mips/power/ 360 361# boot image targets (arch/mips/boot/) 362boot-y := vmlinux.bin 363boot-y += vmlinux.ecoff 364boot-y += vmlinux.srec 365boot-y += uImage 366boot-y += uImage.bin 367boot-y += uImage.bz2 368boot-y += uImage.gz 369boot-y += uImage.lzma 370boot-y += uImage.lzo 371boot-y += vmlinux.itb 372boot-y += vmlinux.gz.itb 373boot-y += vmlinux.bz2.itb 374boot-y += vmlinux.lzma.itb 375boot-y += vmlinux.lzo.itb 376 377# compressed boot image targets (arch/mips/boot/compressed/) 378bootz-y := vmlinuz 379bootz-y += vmlinuz.bin 380bootz-y += vmlinuz.ecoff 381bootz-y += vmlinuz.srec 382bootz-y += uzImage.bin 383bootz-y += vmlinuz.itb 384 385# 386# Some machines like the Indy need 32-bit ELF binaries for booting purposes. 387# Other need ECOFF, so we build a 32-bit ELF binary for them which we then 388# convert to ECOFF using elf2ecoff. 389# 390quiet_cmd_32 = OBJCOPY $@ 391 cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@ 392vmlinux.32: vmlinux 393 $(call cmd,32) 394 395# 396# The 64-bit ELF tools are pretty broken so at this time we generate 64-bit 397# ELF files from 32-bit files by conversion. 398# 399quiet_cmd_64 = OBJCOPY $@ 400 cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@ 401vmlinux.64: vmlinux 402 $(call cmd,64) 403 404all: $(all-y) $(KBUILD_DTBS) 405 406# boot 407$(boot-y): $(vmlinux-32) FORCE 408 $(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \ 409 $(bootvars-y) arch/mips/boot/$@ 410 411ifdef CONFIG_SYS_SUPPORTS_ZBOOT 412# boot/compressed 413$(bootz-y): $(vmlinux-32) FORCE 414 $(Q)$(MAKE) $(build)=arch/mips/boot/compressed \ 415 $(bootvars-y) 32bit-bfd=$(32bit-bfd) arch/mips/boot/$@ 416else 417vmlinuz: FORCE 418 @echo ' CONFIG_SYS_SUPPORTS_ZBOOT is not enabled' 419 /bin/false 420endif 421 422 423CLEAN_FILES += vmlinux.32 vmlinux.64 424 425# device-trees 426core-y += arch/mips/boot/dts/ 427 428archprepare: 429ifdef CONFIG_MIPS32_N32 430 @$(kecho) ' Checking missing-syscalls for N32' 431 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32" 432endif 433ifdef CONFIG_MIPS32_O32 434 @$(kecho) ' Checking missing-syscalls for O32' 435 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32" 436endif 437 438install: 439 $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE) 440ifdef CONFIG_SYS_SUPPORTS_ZBOOT 441 $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE) 442endif 443 $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE) 444 $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE) 445 446archheaders: 447 $(Q)$(MAKE) $(build)=arch/mips/kernel/syscalls all 448 449define archhelp 450 echo ' install - install kernel into $(INSTALL_PATH)' 451 echo ' vmlinux.ecoff - ECOFF boot image' 452 echo ' vmlinux.bin - Raw binary boot image' 453 echo ' vmlinux.srec - SREC boot image' 454 echo ' vmlinux.32 - 64-bit boot image wrapped in 32bits (IP22/IP32)' 455 echo ' vmlinuz - Compressed boot(zboot) image' 456 echo ' vmlinuz.ecoff - ECOFF zboot image' 457 echo ' vmlinuz.bin - Raw binary zboot image' 458 echo ' vmlinuz.srec - SREC zboot image' 459 echo ' uImage - U-Boot image' 460 echo ' uImage.bin - U-Boot image (uncompressed)' 461 echo ' uImage.bz2 - U-Boot image (bz2)' 462 echo ' uImage.gz - U-Boot image (gzip)' 463 echo ' uImage.lzma - U-Boot image (lzma)' 464 echo ' uImage.lzo - U-Boot image (lzo)' 465 echo ' uzImage.bin - U-Boot image (self-extracting)' 466 echo 467 echo ' These will be default as appropriate for a configured platform.' 468 echo 469 echo ' If you are targeting a system supported by generic kernels you may' 470 echo ' configure the kernel for a given architecture target like so:' 471 echo 472 echo ' {micro32,32,64}{r1,r2,r6}{el,}_defconfig <BOARDS="list of boards">' 473 echo 474 echo ' Where BOARDS is some subset of the following:' 475 for board in $(sort $(BOARDS)); do echo " $${board}"; done 476 echo 477 echo ' Specifically the following generic default configurations are' 478 echo ' supported:' 479 echo 480 $(foreach cfg,$(generic_defconfigs), 481 printf " %-24s - Build generic kernel for $(call describe_generic_defconfig,$(cfg))\n" $(cfg);) 482 echo 483 echo ' The following legacy default configurations have been converted to' 484 echo ' generic and can still be used:' 485 echo 486 $(foreach cfg,$(sort $(legacy_defconfigs)), 487 printf " %-24s - Build $($(cfg)-y)\n" $(cfg);) 488 echo 489 echo ' Otherwise, the following default configurations are available:' 490endef 491 492generic_config_dir = $(srctree)/arch/$(ARCH)/configs/generic 493generic_defconfigs := 494 495# 496# If the user generates a generic kernel configuration without specifying a 497# list of boards to include the config fragments for, default to including all 498# available board config fragments. 499# 500ifeq ($(BOARDS),) 501BOARDS = $(patsubst board-%.config,%,$(notdir $(wildcard $(generic_config_dir)/board-*.config))) 502endif 503 504# 505# Generic kernel configurations which merge generic_defconfig with the 506# appropriate config fragments from arch/mips/configs/generic/, resulting in 507# the ability to easily configure the kernel for a given architecture, 508# endianness & set of boards without duplicating the needed configuration in 509# hundreds of defconfig files. 510# 511define gen_generic_defconfigs 512$(foreach bits,$(1),$(foreach rev,$(2),$(foreach endian,$(3), 513target := $(bits)$(rev)$(filter el,$(endian))_defconfig 514generic_defconfigs += $$(target) 515$$(target): $(generic_config_dir)/$(bits)$(rev).config 516$$(target): $(generic_config_dir)/$(endian).config 517))) 518endef 519 520$(eval $(call gen_generic_defconfigs,32 64,r1 r2 r6,eb el)) 521$(eval $(call gen_generic_defconfigs,micro32,r2,eb el)) 522 523define describe_generic_defconfig 524$(subst 32r,MIPS32 r,$(subst 64r,MIPS64 r,$(subst el, little endian,$(patsubst %_defconfig,%,$(1))))) 525endef 526 527.PHONY: $(generic_defconfigs) 528$(generic_defconfigs): 529 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ 530 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/generic_defconfig $^ | \ 531 grep -Ev '^#' 532 $(Q)cp $(KCONFIG_CONFIG) $(objtree)/.config.$@ 533 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig \ 534 KCONFIG_CONFIG=$(objtree)/.config.$@ >/dev/null 535 $(Q)$(CONFIG_SHELL) $(srctree)/arch/$(ARCH)/tools/generic-board-config.sh \ 536 $(srctree) $(objtree) $(objtree)/.config.$@ $(KCONFIG_CONFIG) \ 537 "$(origin BOARDS)" $(BOARDS) 538 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 539 540# 541# Prevent generic merge_config rules attempting to merge single fragments 542# 543$(generic_config_dir)/%.config: ; 544 545# 546# Prevent direct use of generic_defconfig, which is intended to be used as the 547# basis of the various ISA-specific targets generated above. 548# 549.PHONY: generic_defconfig 550generic_defconfig: 551 $(Q)echo "generic_defconfig is not intended for direct use, but should instead be" 552 $(Q)echo "used via an ISA-specific target from the following list:" 553 $(Q)echo 554 $(Q)for cfg in $(generic_defconfigs); do echo " $${cfg}"; done 555 $(Q)echo 556 $(Q)false 557 558# 559# Legacy defconfig compatibility - these targets used to be real defconfigs but 560# now that the boards have been converted to use the generic kernel they are 561# wrappers around the generic rules above. 562# 563legacy_defconfigs += ocelot_defconfig 564ocelot_defconfig-y := 32r2el_defconfig BOARDS=ocelot 565 566legacy_defconfigs += sead3_defconfig 567sead3_defconfig-y := 32r2el_defconfig BOARDS=sead-3 568 569legacy_defconfigs += sead3micro_defconfig 570sead3micro_defconfig-y := micro32r2el_defconfig BOARDS=sead-3 571 572legacy_defconfigs += xilfpga_defconfig 573xilfpga_defconfig-y := 32r2el_defconfig BOARDS=xilfpga 574 575legacy_defconfigs += pistachio_defconfig 576pistachio_defconfig-y := 32r2el_defconfig BOARDS=marduk 577 578.PHONY: $(legacy_defconfigs) 579$(legacy_defconfigs): 580 $(Q)$(MAKE) -f $(srctree)/Makefile $($@-y) 581