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) += $(call cc-option,-march=r3000,-march=mips1) 152cflags-$(CONFIG_CPU_R4300) += $(call cc-option,-march=r4300,-march=mips3) -Wa,--trap 153cflags-$(CONFIG_CPU_R4X00) += $(call cc-option,-march=r4600,-march=mips3) -Wa,--trap 154cflags-$(CONFIG_CPU_TX49XX) += $(call cc-option,-march=r4600,-march=mips3) -Wa,--trap 155cflags-$(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) += $(call cc-option,-march=p5600,-march=mips32r5) \ 164 -Wa,--trap -modd-spreg 165cflags-$(CONFIG_CPU_R5000) += $(call cc-option,-march=r5000,-march=mips4) \ 166 -Wa,--trap 167cflags-$(CONFIG_CPU_R5500) += $(call cc-option,-march=r5500,-march=mips4) \ 168 -Wa,--trap 169cflags-$(CONFIG_CPU_NEVADA) += $(call cc-option,-march=rm5200,-march=mips4) \ 170 -Wa,--trap 171cflags-$(CONFIG_CPU_RM7000) += $(call cc-option,-march=rm7000,-march=mips4) \ 172 -Wa,--trap 173cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-march=sb1,-march=mips64r1) \ 174 -Wa,--trap 175cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-mno-mdmx) 176cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-mno-mips3d) 177cflags-$(CONFIG_CPU_R10000) += $(call cc-option,-march=r10000,-march=mips4) \ 178 -Wa,--trap 179cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -march=octeon -Wa,--trap 180cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1 181cflags-$(CONFIG_CPU_BMIPS) += -march=mips32 -Wa,--trap 182 183cflags-$(CONFIG_CPU_LOONGSON2E) += \ 184 $(call cc-option,-march=loongson2e,-march=mips3) -Wa,--trap 185cflags-$(CONFIG_CPU_LOONGSON2F) += \ 186 $(call cc-option,-march=loongson2f,-march=mips3) -Wa,--trap 187# Some -march= flags enable MMI instructions, and GCC complains about that 188# support being enabled alongside -msoft-float. Thus explicitly disable MMI. 189cflags-$(CONFIG_CPU_LOONGSON2EF) += $(call cc-option,-mno-loongson-mmi) 190cflags-$(CONFIG_CPU_LOONGSON64) += \ 191 $(call cc-option,-march=loongson3a,-march=mips64r2) -Wa,--trap 192cflags-$(CONFIG_CPU_LOONGSON64) += $(call cc-option,-mno-loongson-mmi) 193 194cflags-$(CONFIG_CPU_R4000_WORKAROUNDS) += $(call cc-option,-mfix-r4000,) 195cflags-$(CONFIG_CPU_R4400_WORKAROUNDS) += $(call cc-option,-mfix-r4400,) 196cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS) += $(call cc-option,-mno-daddi,) 197ifdef CONFIG_CPU_LOONGSON2F_WORKAROUNDS 198cflags-$(CONFIG_CPU_NOP_WORKAROUNDS) += -Wa,-mfix-loongson2f-nop 199cflags-$(CONFIG_CPU_JUMP_WORKAROUNDS) += -Wa,-mfix-loongson2f-jump 200endif 201 202# 203# Some versions of binutils, not currently mainline as of 2019/02/04, support 204# an -mfix-loongson3-llsc flag which emits a sync prior to each ll instruction 205# to work around a CPU bug (see __SYNC_loongson3_war in asm/sync.h for a 206# description). 207# 208# We disable this in order to prevent the assembler meddling with the 209# instruction that labels refer to, ie. if we label an ll instruction: 210# 211# 1: ll v0, 0(a0) 212# 213# ...then with the assembler fix applied the label may actually point at a sync 214# instruction inserted by the assembler, and if we were using the label in an 215# exception table the table would no longer contain the address of the ll 216# instruction. 217# 218# Avoid this by explicitly disabling that assembler behaviour. If upstream 219# binutils does not merge support for the flag then we can revisit & remove 220# this later - for now it ensures vendor toolchains don't cause problems. 221# 222cflags-$(CONFIG_CPU_LOONGSON64) += $(call as-option,-Wa$(comma)-mno-fix-loongson3-llsc,) 223 224# For smartmips configurations, there are hundreds of warnings due to ISA overrides 225# in assembly and header files. smartmips is only supported for MIPS32r1 onwards 226# and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or 227# similar directives in the kernel will spam the build logs with the following warnings: 228# Warning: the `smartmips' extension requires MIPS32 revision 1 or greater 229# or 230# Warning: the 64-bit MIPS architecture does not support the `smartmips' extension 231# Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has 232# been fixed properly. 233mips-cflags := $(cflags-y) 234ifeq ($(CONFIG_CPU_HAS_SMARTMIPS),y) 235smartmips-ase := $(call cc-option-yn,$(mips-cflags) -msmartmips) 236cflags-$(smartmips-ase) += -msmartmips -Wa,--no-warn 237endif 238ifeq ($(CONFIG_CPU_MICROMIPS),y) 239micromips-ase := $(call cc-option-yn,$(mips-cflags) -mmicromips) 240cflags-$(micromips-ase) += -mmicromips 241endif 242ifeq ($(CONFIG_CPU_HAS_MSA),y) 243toolchain-msa := $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa) 244cflags-$(toolchain-msa) += -DTOOLCHAIN_SUPPORTS_MSA 245endif 246toolchain-virt := $(call cc-option-yn,$(mips-cflags) -mvirt) 247cflags-$(toolchain-virt) += -DTOOLCHAIN_SUPPORTS_VIRT 248# For -mmicromips, use -Wa,-fatal-warnings to catch unsupported -mxpa which 249# only warns 250xpa-cflags-y := $(mips-cflags) 251xpa-cflags-$(micromips-ase) += -mmicromips -Wa$(comma)-fatal-warnings 252toolchain-xpa := $(call cc-option-yn,$(xpa-cflags-y) -mxpa) 253cflags-$(toolchain-xpa) += -DTOOLCHAIN_SUPPORTS_XPA 254toolchain-crc := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mcrc) 255cflags-$(toolchain-crc) += -DTOOLCHAIN_SUPPORTS_CRC 256toolchain-dsp := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mdsp) 257cflags-$(toolchain-dsp) += -DTOOLCHAIN_SUPPORTS_DSP 258toolchain-ginv := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mginv) 259cflags-$(toolchain-ginv) += -DTOOLCHAIN_SUPPORTS_GINV 260 261# 262# Firmware support 263# 264libs-$(CONFIG_FW_ARC) += arch/mips/fw/arc/ 265libs-$(CONFIG_FW_CFE) += arch/mips/fw/cfe/ 266libs-$(CONFIG_FW_SNIPROM) += arch/mips/fw/sni/ 267libs-y += arch/mips/fw/lib/ 268 269# 270# Kernel compression 271# 272ifdef CONFIG_SYS_SUPPORTS_ZBOOT 273COMPRESSION_FNAME = vmlinuz 274else 275COMPRESSION_FNAME = vmlinux 276endif 277 278# 279# Board-dependent options and extra files 280# 281include $(srctree)/arch/mips/Kbuild.platforms 282 283ifdef CONFIG_PHYSICAL_START 284load-y = $(CONFIG_PHYSICAL_START) 285endif 286 287entry-y = $(shell $(objtree)/arch/mips/tools/elf-entry vmlinux) 288cflags-y += -I$(srctree)/arch/mips/include/asm/mach-generic 289drivers-$(CONFIG_PCI) += arch/mips/pci/ 290 291# 292# Automatically detect the build format. By default we choose 293# the elf format according to the load address. 294# We can always force a build with a 64-bits symbol format by 295# passing 'KBUILD_SYM32=no' option to the make's command line. 296# 297ifdef CONFIG_64BIT 298 ifndef KBUILD_SYM32 299 ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0) 300 KBUILD_SYM32 = $(call cc-option-yn, -msym32) 301 endif 302 endif 303 304 ifeq ($(KBUILD_SYM32), y) 305 cflags-$(KBUILD_SYM32) += -msym32 -DKBUILD_64BIT_SYM32 306 else 307 ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y) 308 $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32) 309 endif 310 endif 311endif 312 313# When linking a 32-bit executable the LLVM linker cannot cope with a 314# 32-bit load address that has been sign-extended to 64 bits. Simply 315# remove the upper 32 bits then, as it is safe to do so with other 316# linkers. 317ifdef CONFIG_64BIT 318 load-ld = $(load-y) 319else 320 load-ld = $(subst 0xffffffff,0x,$(load-y)) 321endif 322 323KBUILD_AFLAGS += $(cflags-y) 324KBUILD_CFLAGS += $(cflags-y) 325KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y) -DLINKER_LOAD_ADDRESS=$(load-ld) 326KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0) 327 328bootvars-y = VMLINUX_LOAD_ADDRESS=$(load-y) \ 329 LINKER_LOAD_ADDRESS=$(load-ld) \ 330 VMLINUX_ENTRY_ADDRESS=$(entry-y) \ 331 PLATFORM="$(platform-y)" \ 332 ITS_INPUTS="$(its-y)" 333ifdef CONFIG_32BIT 334bootvars-y += ADDR_BITS=32 335endif 336ifdef CONFIG_64BIT 337bootvars-y += ADDR_BITS=64 338endif 339 340# This is required to get dwarf unwinding tables into .debug_frame 341# instead of .eh_frame so we don't discard them. 342KBUILD_CFLAGS += -fno-asynchronous-unwind-tables 343 344KBUILD_LDFLAGS += -m $(ld-emul) 345 346ifdef need-compiler 347CHECKFLAGS += $(shell $(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \ 348 grep -E -vw '__GNUC_(MINOR_|PATCHLEVEL_)?_' | \ 349 sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g') 350endif 351 352OBJCOPYFLAGS += --remove-section=.reginfo 353 354libs-y += arch/mips/lib/ 355libs-$(CONFIG_MIPS_FP_SUPPORT) += arch/mips/math-emu/ 356 357drivers-y += arch/mips/crypto/ 358 359# suspend and hibernation support 360drivers-$(CONFIG_PM) += arch/mips/power/ 361 362# boot image targets (arch/mips/boot/) 363boot-y := vmlinux.bin 364boot-y += vmlinux.ecoff 365boot-y += vmlinux.srec 366boot-y += uImage 367boot-y += uImage.bin 368boot-y += uImage.bz2 369boot-y += uImage.gz 370boot-y += uImage.lzma 371boot-y += uImage.lzo 372boot-y += vmlinux.itb 373boot-y += vmlinux.gz.itb 374boot-y += vmlinux.bz2.itb 375boot-y += vmlinux.lzma.itb 376boot-y += vmlinux.lzo.itb 377 378# compressed boot image targets (arch/mips/boot/compressed/) 379bootz-y := vmlinuz 380bootz-y += vmlinuz.bin 381bootz-y += vmlinuz.ecoff 382bootz-y += vmlinuz.srec 383bootz-y += uzImage.bin 384bootz-y += vmlinuz.itb 385 386# 387# Some machines like the Indy need 32-bit ELF binaries for booting purposes. 388# Other need ECOFF, so we build a 32-bit ELF binary for them which we then 389# convert to ECOFF using elf2ecoff. 390# 391quiet_cmd_32 = OBJCOPY $@ 392 cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@ 393vmlinux.32: vmlinux 394 $(call cmd,32) 395 396# 397# The 64-bit ELF tools are pretty broken so at this time we generate 64-bit 398# ELF files from 32-bit files by conversion. 399# 400quiet_cmd_64 = OBJCOPY $@ 401 cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@ 402vmlinux.64: vmlinux 403 $(call cmd,64) 404 405all: $(all-y) $(KBUILD_DTBS) 406 407# boot 408$(boot-y): $(vmlinux-32) FORCE 409 $(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \ 410 $(bootvars-y) arch/mips/boot/$@ 411 412ifdef CONFIG_SYS_SUPPORTS_ZBOOT 413# boot/compressed 414$(bootz-y): $(vmlinux-32) FORCE 415 $(Q)$(MAKE) $(build)=arch/mips/boot/compressed \ 416 $(bootvars-y) 32bit-bfd=$(32bit-bfd) arch/mips/boot/$@ 417else 418vmlinuz: FORCE 419 @echo ' CONFIG_SYS_SUPPORTS_ZBOOT is not enabled' 420 /bin/false 421endif 422 423 424CLEAN_FILES += vmlinux.32 vmlinux.64 425 426# device-trees 427core-y += arch/mips/boot/dts/ 428 429archprepare: 430ifdef CONFIG_MIPS32_N32 431 @$(kecho) ' Checking missing-syscalls for N32' 432 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32" 433endif 434ifdef CONFIG_MIPS32_O32 435 @$(kecho) ' Checking missing-syscalls for O32' 436 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32" 437endif 438 439install: 440 $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE) 441ifdef CONFIG_SYS_SUPPORTS_ZBOOT 442 $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE) 443endif 444 $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE) 445 $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE) 446 447archheaders: 448 $(Q)$(MAKE) $(build)=arch/mips/kernel/syscalls all 449 450define archhelp 451 echo ' install - install kernel into $(INSTALL_PATH)' 452 echo ' vmlinux.ecoff - ECOFF boot image' 453 echo ' vmlinux.bin - Raw binary boot image' 454 echo ' vmlinux.srec - SREC boot image' 455 echo ' vmlinux.32 - 64-bit boot image wrapped in 32bits (IP22/IP32)' 456 echo ' vmlinuz - Compressed boot(zboot) image' 457 echo ' vmlinuz.ecoff - ECOFF zboot image' 458 echo ' vmlinuz.bin - Raw binary zboot image' 459 echo ' vmlinuz.srec - SREC zboot image' 460 echo ' uImage - U-Boot image' 461 echo ' uImage.bin - U-Boot image (uncompressed)' 462 echo ' uImage.bz2 - U-Boot image (bz2)' 463 echo ' uImage.gz - U-Boot image (gzip)' 464 echo ' uImage.lzma - U-Boot image (lzma)' 465 echo ' uImage.lzo - U-Boot image (lzo)' 466 echo ' uzImage.bin - U-Boot image (self-extracting)' 467 echo 468 echo ' These will be default as appropriate for a configured platform.' 469 echo 470 echo ' If you are targeting a system supported by generic kernels you may' 471 echo ' configure the kernel for a given architecture target like so:' 472 echo 473 echo ' {micro32,32,64}{r1,r2,r6}{el,}_defconfig <BOARDS="list of boards">' 474 echo 475 echo ' Where BOARDS is some subset of the following:' 476 for board in $(sort $(BOARDS)); do echo " $${board}"; done 477 echo 478 echo ' Specifically the following generic default configurations are' 479 echo ' supported:' 480 echo 481 $(foreach cfg,$(generic_defconfigs), 482 printf " %-24s - Build generic kernel for $(call describe_generic_defconfig,$(cfg))\n" $(cfg);) 483 echo 484 echo ' The following legacy default configurations have been converted to' 485 echo ' generic and can still be used:' 486 echo 487 $(foreach cfg,$(sort $(legacy_defconfigs)), 488 printf " %-24s - Build $($(cfg)-y)\n" $(cfg);) 489 echo 490 echo ' Otherwise, the following default configurations are available:' 491endef 492 493generic_config_dir = $(srctree)/arch/$(ARCH)/configs/generic 494generic_defconfigs := 495 496# 497# If the user generates a generic kernel configuration without specifying a 498# list of boards to include the config fragments for, default to including all 499# available board config fragments. 500# 501ifeq ($(BOARDS),) 502BOARDS = $(patsubst board-%.config,%,$(notdir $(wildcard $(generic_config_dir)/board-*.config))) 503endif 504 505# 506# Generic kernel configurations which merge generic_defconfig with the 507# appropriate config fragments from arch/mips/configs/generic/, resulting in 508# the ability to easily configure the kernel for a given architecture, 509# endianness & set of boards without duplicating the needed configuration in 510# hundreds of defconfig files. 511# 512define gen_generic_defconfigs 513$(foreach bits,$(1),$(foreach rev,$(2),$(foreach endian,$(3), 514target := $(bits)$(rev)$(filter el,$(endian))_defconfig 515generic_defconfigs += $$(target) 516$$(target): $(generic_config_dir)/$(bits)$(rev).config 517$$(target): $(generic_config_dir)/$(endian).config 518))) 519endef 520 521$(eval $(call gen_generic_defconfigs,32 64,r1 r2 r6,eb el)) 522$(eval $(call gen_generic_defconfigs,micro32,r2,eb el)) 523 524define describe_generic_defconfig 525$(subst 32r,MIPS32 r,$(subst 64r,MIPS64 r,$(subst el, little endian,$(patsubst %_defconfig,%,$(1))))) 526endef 527 528.PHONY: $(generic_defconfigs) 529$(generic_defconfigs): 530 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ 531 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/generic_defconfig $^ | \ 532 grep -Ev '^#' 533 $(Q)cp $(KCONFIG_CONFIG) $(objtree)/.config.$@ 534 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig \ 535 KCONFIG_CONFIG=$(objtree)/.config.$@ >/dev/null 536 $(Q)$(CONFIG_SHELL) $(srctree)/arch/$(ARCH)/tools/generic-board-config.sh \ 537 $(srctree) $(objtree) $(objtree)/.config.$@ $(KCONFIG_CONFIG) \ 538 "$(origin BOARDS)" $(BOARDS) 539 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 540 541# 542# Prevent generic merge_config rules attempting to merge single fragments 543# 544$(generic_config_dir)/%.config: ; 545 546# 547# Prevent direct use of generic_defconfig, which is intended to be used as the 548# basis of the various ISA-specific targets generated above. 549# 550.PHONY: generic_defconfig 551generic_defconfig: 552 $(Q)echo "generic_defconfig is not intended for direct use, but should instead be" 553 $(Q)echo "used via an ISA-specific target from the following list:" 554 $(Q)echo 555 $(Q)for cfg in $(generic_defconfigs); do echo " $${cfg}"; done 556 $(Q)echo 557 $(Q)false 558 559# 560# Legacy defconfig compatibility - these targets used to be real defconfigs but 561# now that the boards have been converted to use the generic kernel they are 562# wrappers around the generic rules above. 563# 564legacy_defconfigs += ocelot_defconfig 565ocelot_defconfig-y := 32r2el_defconfig BOARDS=ocelot 566 567legacy_defconfigs += sead3_defconfig 568sead3_defconfig-y := 32r2el_defconfig BOARDS=sead-3 569 570legacy_defconfigs += sead3micro_defconfig 571sead3micro_defconfig-y := micro32r2el_defconfig BOARDS=sead-3 572 573legacy_defconfigs += xilfpga_defconfig 574xilfpga_defconfig-y := 32r2el_defconfig BOARDS=xilfpga 575 576legacy_defconfigs += pistachio_defconfig 577pistachio_defconfig-y := 32r2el_defconfig BOARDS=marduk 578 579.PHONY: $(legacy_defconfigs) 580$(legacy_defconfigs): 581 $(Q)$(MAKE) -f $(srctree)/Makefile $($@-y) 582