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 287 288# When linking a 32-bit executable the LLVM linker cannot cope with a 289# 32-bit load address that has been sign-extended to 64 bits. Simply 290# remove the upper 32 bits then, as it is safe to do so with other 291# linkers. 292ifdef CONFIG_64BIT 293 load-ld = $(load-y) 294else 295 load-ld = $(subst 0xffffffff,0x,$(load-y)) 296endif 297 298KBUILD_AFLAGS += $(cflags-y) 299KBUILD_CFLAGS += $(cflags-y) 300KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y) -DLINKER_LOAD_ADDRESS=$(load-ld) 301KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0) 302 303bootvars-y = VMLINUX_LOAD_ADDRESS=$(load-y) \ 304 LINKER_LOAD_ADDRESS=$(load-ld) \ 305 VMLINUX_ENTRY_ADDRESS=$(entry-y) \ 306 PLATFORM="$(platform-y)" \ 307 ITS_INPUTS="$(its-y)" 308ifdef CONFIG_32BIT 309bootvars-y += ADDR_BITS=32 310endif 311ifdef CONFIG_64BIT 312bootvars-y += ADDR_BITS=64 313endif 314 315# This is required to get dwarf unwinding tables into .debug_frame 316# instead of .eh_frame so we don't discard them. 317KBUILD_CFLAGS += -fno-asynchronous-unwind-tables 318 319KBUILD_LDFLAGS += -m $(ld-emul) 320 321ifdef CONFIG_MIPS 322CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \ 323 egrep -vw '__GNUC_(MINOR_|PATCHLEVEL_)?_' | \ 324 sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g') 325endif 326 327OBJCOPYFLAGS += --remove-section=.reginfo 328 329head-y := arch/mips/kernel/head.o 330 331libs-y += arch/mips/lib/ 332libs-$(CONFIG_MIPS_FP_SUPPORT) += arch/mips/math-emu/ 333 334# See arch/mips/Kbuild for content of core part of the kernel 335core-y += arch/mips/ 336 337drivers-$(CONFIG_MIPS_CRC_SUPPORT) += arch/mips/crypto/ 338drivers-$(CONFIG_OPROFILE) += arch/mips/oprofile/ 339 340# suspend and hibernation support 341drivers-$(CONFIG_PM) += arch/mips/power/ 342 343# boot image targets (arch/mips/boot/) 344boot-y := vmlinux.bin 345boot-y += vmlinux.ecoff 346boot-y += vmlinux.srec 347ifeq ($(shell expr $(load-y) \< 0xffffffff80000000 2> /dev/null), 0) 348boot-y += uImage 349boot-y += uImage.bin 350boot-y += uImage.bz2 351boot-y += uImage.gz 352boot-y += uImage.lzma 353boot-y += uImage.lzo 354endif 355boot-y += vmlinux.itb 356boot-y += vmlinux.gz.itb 357boot-y += vmlinux.bz2.itb 358boot-y += vmlinux.lzma.itb 359boot-y += vmlinux.lzo.itb 360 361# compressed boot image targets (arch/mips/boot/compressed/) 362bootz-y := vmlinuz 363bootz-y += vmlinuz.bin 364bootz-y += vmlinuz.ecoff 365bootz-y += vmlinuz.srec 366ifeq ($(shell expr $(zload-y) \< 0xffffffff80000000 2> /dev/null), 0) 367bootz-y += uzImage.bin 368endif 369 370ifdef CONFIG_LASAT 371rom.bin rom.sw: vmlinux 372 $(Q)$(MAKE) $(build)=arch/mips/lasat/image \ 373 $(bootvars-y) $@ 374endif 375 376# 377# Some machines like the Indy need 32-bit ELF binaries for booting purposes. 378# Other need ECOFF, so we build a 32-bit ELF binary for them which we then 379# convert to ECOFF using elf2ecoff. 380# 381quiet_cmd_32 = OBJCOPY $@ 382 cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@ 383vmlinux.32: vmlinux 384 $(call cmd,32) 385 386# 387# The 64-bit ELF tools are pretty broken so at this time we generate 64-bit 388# ELF files from 32-bit files by conversion. 389# 390quiet_cmd_64 = OBJCOPY $@ 391 cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@ 392vmlinux.64: vmlinux 393 $(call cmd,64) 394 395all: $(all-y) $(KBUILD_DTBS) 396 397# boot 398$(boot-y): $(vmlinux-32) FORCE 399 $(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \ 400 $(bootvars-y) arch/mips/boot/$@ 401 402ifdef CONFIG_SYS_SUPPORTS_ZBOOT 403# boot/compressed 404$(bootz-y): $(vmlinux-32) FORCE 405 $(Q)$(MAKE) $(build)=arch/mips/boot/compressed \ 406 $(bootvars-y) 32bit-bfd=$(32bit-bfd) $@ 407else 408vmlinuz: FORCE 409 @echo ' CONFIG_SYS_SUPPORTS_ZBOOT is not enabled' 410 /bin/false 411endif 412 413 414CLEAN_FILES += vmlinux.32 vmlinux.64 415 416# device-trees 417core-y += arch/mips/boot/dts/ 418 419archprepare: 420ifdef CONFIG_MIPS32_N32 421 @$(kecho) ' Checking missing-syscalls for N32' 422 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32" 423endif 424ifdef CONFIG_MIPS32_O32 425 @$(kecho) ' Checking missing-syscalls for O32' 426 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32" 427endif 428 429install: 430 $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE) 431ifdef CONFIG_SYS_SUPPORTS_ZBOOT 432 $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE) 433endif 434 $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE) 435 $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE) 436 437archclean: 438 $(Q)$(MAKE) $(clean)=arch/mips/boot 439 $(Q)$(MAKE) $(clean)=arch/mips/boot/compressed 440 $(Q)$(MAKE) $(clean)=arch/mips/boot/tools 441 $(Q)$(MAKE) $(clean)=arch/mips/lasat 442 443archheaders: 444 $(Q)$(MAKE) $(build)=arch/mips/kernel/syscalls all 445 446define archhelp 447 echo ' install - install kernel into $(INSTALL_PATH)' 448 echo ' vmlinux.ecoff - ECOFF boot image' 449 echo ' vmlinux.bin - Raw binary boot image' 450 echo ' vmlinux.srec - SREC boot image' 451 echo ' vmlinux.32 - 64-bit boot image wrapped in 32bits (IP22/IP32)' 452 echo ' vmlinuz - Compressed boot(zboot) image' 453 echo ' vmlinuz.ecoff - ECOFF zboot image' 454 echo ' vmlinuz.bin - Raw binary zboot image' 455 echo ' vmlinuz.srec - SREC zboot image' 456 echo ' uImage - U-Boot image' 457 echo ' uImage.bin - U-Boot image (uncompressed)' 458 echo ' uImage.bz2 - U-Boot image (bz2)' 459 echo ' uImage.gz - U-Boot image (gzip)' 460 echo ' uImage.lzma - U-Boot image (lzma)' 461 echo ' uImage.lzo - U-Boot image (lzo)' 462 echo ' uzImage.bin - U-Boot image (self-extracting)' 463 echo 464 echo ' These will be default as appropriate for a configured platform.' 465 echo 466 echo ' If you are targeting a system supported by generic kernels you may' 467 echo ' configure the kernel for a given architecture target like so:' 468 echo 469 echo ' {micro32,32,64}{r1,r2,r6}{el,}_defconfig <BOARDS="list of boards">' 470 echo 471 echo ' Where BOARDS is some subset of the following:' 472 for board in $(sort $(BOARDS)); do echo " $${board}"; done 473 echo 474 echo ' Specifically the following generic default configurations are' 475 echo ' supported:' 476 echo 477 $(foreach cfg,$(generic_defconfigs), 478 printf " %-24s - Build generic kernel for $(call describe_generic_defconfig,$(cfg))\n" $(cfg);) 479 echo 480 echo ' The following legacy default configurations have been converted to' 481 echo ' generic and can still be used:' 482 echo 483 $(foreach cfg,$(sort $(legacy_defconfigs)), 484 printf " %-24s - Build $($(cfg)-y)\n" $(cfg);) 485 echo 486 echo ' Otherwise, the following default configurations are available:' 487endef 488 489generic_config_dir = $(srctree)/arch/$(ARCH)/configs/generic 490generic_defconfigs := 491 492# 493# If the user generates a generic kernel configuration without specifying a 494# list of boards to include the config fragments for, default to including all 495# available board config fragments. 496# 497ifeq ($(BOARDS),) 498BOARDS = $(patsubst board-%.config,%,$(notdir $(wildcard $(generic_config_dir)/board-*.config))) 499endif 500 501# 502# Generic kernel configurations which merge generic_defconfig with the 503# appropriate config fragments from arch/mips/configs/generic/, resulting in 504# the ability to easily configure the kernel for a given architecture, 505# endianness & set of boards without duplicating the needed configuration in 506# hundreds of defconfig files. 507# 508define gen_generic_defconfigs 509$(foreach bits,$(1),$(foreach rev,$(2),$(foreach endian,$(3), 510target := $(bits)$(rev)$(filter el,$(endian))_defconfig 511generic_defconfigs += $$(target) 512$$(target): $(generic_config_dir)/$(bits)$(rev).config 513$$(target): $(generic_config_dir)/$(endian).config 514))) 515endef 516 517$(eval $(call gen_generic_defconfigs,32 64,r1 r2 r6,eb el)) 518$(eval $(call gen_generic_defconfigs,micro32,r2,eb el)) 519 520define describe_generic_defconfig 521$(subst 32r,MIPS32 r,$(subst 64r,MIPS64 r,$(subst el, little endian,$(patsubst %_defconfig,%,$(1))))) 522endef 523 524.PHONY: $(generic_defconfigs) 525$(generic_defconfigs): 526 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ 527 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/generic_defconfig $^ | \ 528 grep -Ev '^#' 529 $(Q)cp $(KCONFIG_CONFIG) $(objtree)/.config.$@ 530 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig \ 531 KCONFIG_CONFIG=$(objtree)/.config.$@ >/dev/null 532 $(Q)$(CONFIG_SHELL) $(srctree)/arch/$(ARCH)/tools/generic-board-config.sh \ 533 $(srctree) $(objtree) $(objtree)/.config.$@ $(KCONFIG_CONFIG) \ 534 "$(origin BOARDS)" $(BOARDS) 535 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 536 537# 538# Prevent generic merge_config rules attempting to merge single fragments 539# 540$(generic_config_dir)/%.config: ; 541 542# 543# Prevent direct use of generic_defconfig, which is intended to be used as the 544# basis of the various ISA-specific targets generated above. 545# 546.PHONY: generic_defconfig 547generic_defconfig: 548 $(Q)echo "generic_defconfig is not intended for direct use, but should instead be" 549 $(Q)echo "used via an ISA-specific target from the following list:" 550 $(Q)echo 551 $(Q)for cfg in $(generic_defconfigs); do echo " $${cfg}"; done 552 $(Q)echo 553 $(Q)false 554 555# 556# Legacy defconfig compatibility - these targets used to be real defconfigs but 557# now that the boards have been converted to use the generic kernel they are 558# wrappers around the generic rules above. 559# 560legacy_defconfigs += ocelot_defconfig 561ocelot_defconfig-y := 32r2el_defconfig BOARDS=ocelot 562 563legacy_defconfigs += sead3_defconfig 564sead3_defconfig-y := 32r2el_defconfig BOARDS=sead-3 565 566legacy_defconfigs += sead3micro_defconfig 567sead3micro_defconfig-y := micro32r2el_defconfig BOARDS=sead-3 568 569legacy_defconfigs += xilfpga_defconfig 570xilfpga_defconfig-y := 32r2el_defconfig BOARDS=xilfpga 571 572.PHONY: $(legacy_defconfigs) 573$(legacy_defconfigs): 574 $(Q)$(MAKE) -f $(srctree)/Makefile $($@-y) 575