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) += $(call cc-option,-march=octeon) -Wa,--trap 178ifeq (,$(findstring march=octeon, $(cflags-$(CONFIG_CPU_CAVIUM_OCTEON)))) 179cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -Wa,-march=octeon 180endif 181cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1 182cflags-$(CONFIG_CPU_BMIPS) += -march=mips32 -Wa,-mips32 -Wa,--trap 183 184cflags-$(CONFIG_CPU_LOONGSON2E) += -march=loongson2e -Wa,--trap 185cflags-$(CONFIG_CPU_LOONGSON2F) += -march=loongson2f -Wa,--trap 186# Some -march= flags enable MMI instructions, and GCC complains about that 187# support being enabled alongside -msoft-float. Thus explicitly disable MMI. 188cflags-$(CONFIG_CPU_LOONGSON2EF) += $(call cc-option,-mno-loongson-mmi) 189ifdef CONFIG_CPU_LOONGSON64 190cflags-$(CONFIG_CPU_LOONGSON64) += -Wa,--trap 191cflags-$(CONFIG_CC_IS_GCC) += -march=loongson3a 192cflags-$(CONFIG_CC_IS_CLANG) += -march=mips64r2 193endif 194cflags-$(CONFIG_CPU_LOONGSON64) += $(call cc-option,-mno-loongson-mmi) 195 196cflags-$(CONFIG_CPU_R4000_WORKAROUNDS) += $(call cc-option,-mfix-r4000,) 197cflags-$(CONFIG_CPU_R4400_WORKAROUNDS) += $(call cc-option,-mfix-r4400,) 198cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS) += $(call cc-option,-mno-daddi,) 199ifdef CONFIG_CPU_LOONGSON2F_WORKAROUNDS 200cflags-$(CONFIG_CPU_NOP_WORKAROUNDS) += -Wa,-mfix-loongson2f-nop 201cflags-$(CONFIG_CPU_JUMP_WORKAROUNDS) += -Wa,-mfix-loongson2f-jump 202endif 203 204# 205# Some versions of binutils, not currently mainline as of 2019/02/04, support 206# an -mfix-loongson3-llsc flag which emits a sync prior to each ll instruction 207# to work around a CPU bug (see __SYNC_loongson3_war in asm/sync.h for a 208# description). 209# 210# We disable this in order to prevent the assembler meddling with the 211# instruction that labels refer to, ie. if we label an ll instruction: 212# 213# 1: ll v0, 0(a0) 214# 215# ...then with the assembler fix applied the label may actually point at a sync 216# instruction inserted by the assembler, and if we were using the label in an 217# exception table the table would no longer contain the address of the ll 218# instruction. 219# 220# Avoid this by explicitly disabling that assembler behaviour. If upstream 221# binutils does not merge support for the flag then we can revisit & remove 222# this later - for now it ensures vendor toolchains don't cause problems. 223# 224cflags-$(CONFIG_CPU_LOONGSON64) += $(call as-option,-Wa$(comma)-mno-fix-loongson3-llsc,) 225 226# For smartmips configurations, there are hundreds of warnings due to ISA overrides 227# in assembly and header files. smartmips is only supported for MIPS32r1 onwards 228# and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or 229# similar directives in the kernel will spam the build logs with the following warnings: 230# Warning: the `smartmips' extension requires MIPS32 revision 1 or greater 231# or 232# Warning: the 64-bit MIPS architecture does not support the `smartmips' extension 233# Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has 234# been fixed properly. 235mips-cflags := $(cflags-y) 236ifeq ($(CONFIG_CPU_HAS_SMARTMIPS),y) 237smartmips-ase := $(call cc-option-yn,$(mips-cflags) -msmartmips) 238cflags-$(smartmips-ase) += -msmartmips -Wa,--no-warn 239endif 240ifeq ($(CONFIG_CPU_MICROMIPS),y) 241micromips-ase := $(call cc-option-yn,$(mips-cflags) -mmicromips) 242cflags-$(micromips-ase) += -mmicromips 243endif 244ifeq ($(CONFIG_CPU_HAS_MSA),y) 245toolchain-msa := $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa) 246cflags-$(toolchain-msa) += -DTOOLCHAIN_SUPPORTS_MSA 247endif 248toolchain-virt := $(call cc-option-yn,$(mips-cflags) -mvirt) 249cflags-$(toolchain-virt) += -DTOOLCHAIN_SUPPORTS_VIRT 250# For -mmicromips, use -Wa,-fatal-warnings to catch unsupported -mxpa which 251# only warns 252xpa-cflags-y := $(mips-cflags) 253xpa-cflags-$(micromips-ase) += -mmicromips -Wa$(comma)-fatal-warnings 254toolchain-xpa := $(call cc-option-yn,$(xpa-cflags-y) -mxpa) 255cflags-$(toolchain-xpa) += -DTOOLCHAIN_SUPPORTS_XPA 256toolchain-crc := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mcrc) 257cflags-$(toolchain-crc) += -DTOOLCHAIN_SUPPORTS_CRC 258toolchain-dsp := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mdsp) 259cflags-$(toolchain-dsp) += -DTOOLCHAIN_SUPPORTS_DSP 260toolchain-ginv := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mginv) 261cflags-$(toolchain-ginv) += -DTOOLCHAIN_SUPPORTS_GINV 262 263# 264# Firmware support 265# 266libs-$(CONFIG_FW_ARC) += arch/mips/fw/arc/ 267libs-$(CONFIG_FW_CFE) += arch/mips/fw/cfe/ 268libs-$(CONFIG_FW_SNIPROM) += arch/mips/fw/sni/ 269libs-y += arch/mips/fw/lib/ 270 271# 272# Kernel compression 273# 274ifdef CONFIG_SYS_SUPPORTS_ZBOOT 275COMPRESSION_FNAME = vmlinuz 276else 277COMPRESSION_FNAME = vmlinux 278endif 279 280# 281# Board-dependent options and extra files 282# 283include $(srctree)/arch/mips/Kbuild.platforms 284 285ifdef CONFIG_PHYSICAL_START 286load-y = $(CONFIG_PHYSICAL_START) 287endif 288 289entry-y = $(shell $(objtree)/arch/mips/tools/elf-entry vmlinux) 290cflags-y += -I$(srctree)/arch/mips/include/asm/mach-generic 291drivers-$(CONFIG_PCI) += arch/mips/pci/ 292 293# 294# Automatically detect the build format. By default we choose 295# the elf format according to the load address. 296# We can always force a build with a 64-bits symbol format by 297# passing 'KBUILD_SYM32=no' option to the make's command line. 298# 299ifdef CONFIG_64BIT 300 ifndef KBUILD_SYM32 301 ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0) 302 KBUILD_SYM32 = y 303 endif 304 endif 305 306 ifeq ($(KBUILD_SYM32)$(call cc-option-yn,-msym32), yy) 307 cflags-y += -msym32 -DKBUILD_64BIT_SYM32 308 else 309 ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y) 310 $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32) 311 endif 312 endif 313endif 314 315# When linking a 32-bit executable the LLVM linker cannot cope with a 316# 32-bit load address that has been sign-extended to 64 bits. Simply 317# remove the upper 32 bits then, as it is safe to do so with other 318# linkers. 319ifdef CONFIG_64BIT 320 load-ld = $(load-y) 321else 322 load-ld = $(subst 0xffffffff,0x,$(load-y)) 323endif 324 325KBUILD_AFLAGS += $(cflags-y) 326KBUILD_CFLAGS += $(cflags-y) 327KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y) -DLINKER_LOAD_ADDRESS=$(load-ld) 328KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0) 329 330bootvars-y = VMLINUX_LOAD_ADDRESS=$(load-y) \ 331 LINKER_LOAD_ADDRESS=$(load-ld) \ 332 VMLINUX_ENTRY_ADDRESS=$(entry-y) \ 333 PLATFORM="$(platform-y)" \ 334 ITS_INPUTS="$(its-y)" 335ifdef CONFIG_32BIT 336bootvars-y += ADDR_BITS=32 337endif 338ifdef CONFIG_64BIT 339bootvars-y += ADDR_BITS=64 340endif 341 342# This is required to get dwarf unwinding tables into .debug_frame 343# instead of .eh_frame so we don't discard them. 344KBUILD_CFLAGS += -fno-asynchronous-unwind-tables 345 346KBUILD_LDFLAGS += -m $(ld-emul) 347 348ifdef CONFIG_MIPS 349CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \ 350 grep -E -vw '__GNUC_(MINOR_|PATCHLEVEL_)?_' | \ 351 sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g') 352endif 353 354OBJCOPYFLAGS += --remove-section=.reginfo 355 356libs-y += arch/mips/lib/ 357libs-$(CONFIG_MIPS_FP_SUPPORT) += arch/mips/math-emu/ 358 359drivers-y += arch/mips/crypto/ 360 361# suspend and hibernation support 362drivers-$(CONFIG_PM) += arch/mips/power/ 363 364# boot image targets (arch/mips/boot/) 365boot-y := vmlinux.bin 366boot-y += vmlinux.ecoff 367boot-y += vmlinux.srec 368boot-y += uImage 369boot-y += uImage.bin 370boot-y += uImage.bz2 371boot-y += uImage.gz 372boot-y += uImage.lzma 373boot-y += uImage.lzo 374boot-y += vmlinux.itb 375boot-y += vmlinux.gz.itb 376boot-y += vmlinux.bz2.itb 377boot-y += vmlinux.lzma.itb 378boot-y += vmlinux.lzo.itb 379 380# compressed boot image targets (arch/mips/boot/compressed/) 381bootz-y := vmlinuz 382bootz-y += vmlinuz.bin 383bootz-y += vmlinuz.ecoff 384bootz-y += vmlinuz.srec 385bootz-y += uzImage.bin 386bootz-y += vmlinuz.itb 387 388# 389# Some machines like the Indy need 32-bit ELF binaries for booting purposes. 390# Other need ECOFF, so we build a 32-bit ELF binary for them which we then 391# convert to ECOFF using elf2ecoff. 392# 393quiet_cmd_32 = OBJCOPY $@ 394 cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@ 395vmlinux.32: vmlinux 396 $(call cmd,32) 397 398# 399# The 64-bit ELF tools are pretty broken so at this time we generate 64-bit 400# ELF files from 32-bit files by conversion. 401# 402quiet_cmd_64 = OBJCOPY $@ 403 cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@ 404vmlinux.64: vmlinux 405 $(call cmd,64) 406 407all: $(all-y) $(KBUILD_DTBS) 408 409# boot 410$(boot-y): $(vmlinux-32) FORCE 411 $(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \ 412 $(bootvars-y) arch/mips/boot/$@ 413 414ifdef CONFIG_SYS_SUPPORTS_ZBOOT 415# boot/compressed 416$(bootz-y): $(vmlinux-32) FORCE 417 $(Q)$(MAKE) $(build)=arch/mips/boot/compressed \ 418 $(bootvars-y) 32bit-bfd=$(32bit-bfd) arch/mips/boot/$@ 419else 420vmlinuz: FORCE 421 @echo ' CONFIG_SYS_SUPPORTS_ZBOOT is not enabled' 422 /bin/false 423endif 424 425 426CLEAN_FILES += vmlinux.32 vmlinux.64 427 428# device-trees 429core-y += arch/mips/boot/dts/ 430 431archprepare: 432ifdef CONFIG_MIPS32_N32 433 @$(kecho) ' Checking missing-syscalls for N32' 434 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32" 435endif 436ifdef CONFIG_MIPS32_O32 437 @$(kecho) ' Checking missing-syscalls for O32' 438 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32" 439endif 440 441install: 442 $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE) 443ifdef CONFIG_SYS_SUPPORTS_ZBOOT 444 $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE) 445endif 446 $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE) 447 $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE) 448 449archheaders: 450 $(Q)$(MAKE) $(build)=arch/mips/kernel/syscalls all 451 452define archhelp 453 echo ' install - install kernel into $(INSTALL_PATH)' 454 echo ' vmlinux.ecoff - ECOFF boot image' 455 echo ' vmlinux.bin - Raw binary boot image' 456 echo ' vmlinux.srec - SREC boot image' 457 echo ' vmlinux.32 - 64-bit boot image wrapped in 32bits (IP22/IP32)' 458 echo ' vmlinuz - Compressed boot(zboot) image' 459 echo ' vmlinuz.ecoff - ECOFF zboot image' 460 echo ' vmlinuz.bin - Raw binary zboot image' 461 echo ' vmlinuz.srec - SREC zboot image' 462 echo ' uImage - U-Boot image' 463 echo ' uImage.bin - U-Boot image (uncompressed)' 464 echo ' uImage.bz2 - U-Boot image (bz2)' 465 echo ' uImage.gz - U-Boot image (gzip)' 466 echo ' uImage.lzma - U-Boot image (lzma)' 467 echo ' uImage.lzo - U-Boot image (lzo)' 468 echo ' uzImage.bin - U-Boot image (self-extracting)' 469 echo 470 echo ' These will be default as appropriate for a configured platform.' 471 echo 472 echo ' If you are targeting a system supported by generic kernels you may' 473 echo ' configure the kernel for a given architecture target like so:' 474 echo 475 echo ' {micro32,32,64}{r1,r2,r6}{el,}_defconfig <BOARDS="list of boards">' 476 echo 477 echo ' Where BOARDS is some subset of the following:' 478 for board in $(sort $(BOARDS)); do echo " $${board}"; done 479 echo 480 echo ' Specifically the following generic default configurations are' 481 echo ' supported:' 482 echo 483 $(foreach cfg,$(generic_defconfigs), 484 printf " %-24s - Build generic kernel for $(call describe_generic_defconfig,$(cfg))\n" $(cfg);) 485 echo 486 echo ' The following legacy default configurations have been converted to' 487 echo ' generic and can still be used:' 488 echo 489 $(foreach cfg,$(sort $(legacy_defconfigs)), 490 printf " %-24s - Build $($(cfg)-y)\n" $(cfg);) 491 echo 492 echo ' Otherwise, the following default configurations are available:' 493endef 494 495generic_config_dir = $(srctree)/arch/$(ARCH)/configs/generic 496generic_defconfigs := 497 498# 499# If the user generates a generic kernel configuration without specifying a 500# list of boards to include the config fragments for, default to including all 501# available board config fragments. 502# 503ifeq ($(BOARDS),) 504BOARDS = $(patsubst board-%.config,%,$(notdir $(wildcard $(generic_config_dir)/board-*.config))) 505endif 506 507# 508# Generic kernel configurations which merge generic_defconfig with the 509# appropriate config fragments from arch/mips/configs/generic/, resulting in 510# the ability to easily configure the kernel for a given architecture, 511# endianness & set of boards without duplicating the needed configuration in 512# hundreds of defconfig files. 513# 514define gen_generic_defconfigs 515$(foreach bits,$(1),$(foreach rev,$(2),$(foreach endian,$(3), 516target := $(bits)$(rev)$(filter el,$(endian))_defconfig 517generic_defconfigs += $$(target) 518$$(target): $(generic_config_dir)/$(bits)$(rev).config 519$$(target): $(generic_config_dir)/$(endian).config 520))) 521endef 522 523$(eval $(call gen_generic_defconfigs,32 64,r1 r2 r6,eb el)) 524$(eval $(call gen_generic_defconfigs,micro32,r2,eb el)) 525 526define describe_generic_defconfig 527$(subst 32r,MIPS32 r,$(subst 64r,MIPS64 r,$(subst el, little endian,$(patsubst %_defconfig,%,$(1))))) 528endef 529 530.PHONY: $(generic_defconfigs) 531$(generic_defconfigs): 532 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ 533 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/generic_defconfig $^ | \ 534 grep -Ev '^#' 535 $(Q)cp $(KCONFIG_CONFIG) $(objtree)/.config.$@ 536 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig \ 537 KCONFIG_CONFIG=$(objtree)/.config.$@ >/dev/null 538 $(Q)$(CONFIG_SHELL) $(srctree)/arch/$(ARCH)/tools/generic-board-config.sh \ 539 $(srctree) $(objtree) $(objtree)/.config.$@ $(KCONFIG_CONFIG) \ 540 "$(origin BOARDS)" $(BOARDS) 541 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 542 543# 544# Prevent generic merge_config rules attempting to merge single fragments 545# 546$(generic_config_dir)/%.config: ; 547 548# 549# Prevent direct use of generic_defconfig, which is intended to be used as the 550# basis of the various ISA-specific targets generated above. 551# 552.PHONY: generic_defconfig 553generic_defconfig: 554 $(Q)echo "generic_defconfig is not intended for direct use, but should instead be" 555 $(Q)echo "used via an ISA-specific target from the following list:" 556 $(Q)echo 557 $(Q)for cfg in $(generic_defconfigs); do echo " $${cfg}"; done 558 $(Q)echo 559 $(Q)false 560 561# 562# Legacy defconfig compatibility - these targets used to be real defconfigs but 563# now that the boards have been converted to use the generic kernel they are 564# wrappers around the generic rules above. 565# 566legacy_defconfigs += ocelot_defconfig 567ocelot_defconfig-y := 32r2el_defconfig BOARDS=ocelot 568 569legacy_defconfigs += sead3_defconfig 570sead3_defconfig-y := 32r2el_defconfig BOARDS=sead-3 571 572legacy_defconfigs += sead3micro_defconfig 573sead3micro_defconfig-y := micro32r2el_defconfig BOARDS=sead-3 574 575legacy_defconfigs += xilfpga_defconfig 576xilfpga_defconfig-y := 32r2el_defconfig BOARDS=xilfpga 577 578legacy_defconfigs += pistachio_defconfig 579pistachio_defconfig-y := 32r2el_defconfig BOARDS=marduk 580 581.PHONY: $(legacy_defconfigs) 582$(legacy_defconfigs): 583 $(Q)$(MAKE) -f $(srctree)/Makefile $($@-y) 584