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 15KBUILD_DEFCONFIG := ip22_defconfig 16 17# 18# Select the object file format to substitute into the linker script. 19# 20ifdef CONFIG_CPU_LITTLE_ENDIAN 2132bit-tool-archpref = mipsel 2264bit-tool-archpref = mips64el 2332bit-bfd = elf32-tradlittlemips 2464bit-bfd = elf64-tradlittlemips 2532bit-emul = elf32ltsmip 2664bit-emul = elf64ltsmip 27else 2832bit-tool-archpref = mips 2964bit-tool-archpref = mips64 3032bit-bfd = elf32-tradbigmips 3164bit-bfd = elf64-tradbigmips 3232bit-emul = elf32btsmip 3364bit-emul = elf64btsmip 34endif 35 36ifdef CONFIG_32BIT 37tool-archpref = $(32bit-tool-archpref) 38UTS_MACHINE := mips 39endif 40ifdef CONFIG_64BIT 41tool-archpref = $(64bit-tool-archpref) 42UTS_MACHINE := mips64 43endif 44 45ifneq ($(SUBARCH),$(ARCH)) 46 ifeq ($(CROSS_COMPILE),) 47 CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux- $(tool-archpref)-linux-gnu- $(tool-archpref)-unknown-linux-gnu-) 48 endif 49endif 50 51ifdef CONFIG_FUNCTION_GRAPH_TRACER 52 ifndef KBUILD_MCOUNT_RA_ADDRESS 53 ifeq ($(call cc-option-yn,-mmcount-ra-address), y) 54 cflags-y += -mmcount-ra-address -DKBUILD_MCOUNT_RA_ADDRESS 55 endif 56 endif 57endif 58cflags-y += $(call cc-option, -mno-check-zero-division) 59 60ifdef CONFIG_32BIT 61ld-emul = $(32bit-emul) 62vmlinux-32 = vmlinux 63vmlinux-64 = vmlinux.64 64 65cflags-y += -mabi=32 66endif 67 68ifdef CONFIG_64BIT 69ld-emul = $(64bit-emul) 70vmlinux-32 = vmlinux.32 71vmlinux-64 = vmlinux 72 73cflags-y += -mabi=64 74endif 75 76all-$(CONFIG_BOOT_ELF32) := $(vmlinux-32) 77all-$(CONFIG_BOOT_ELF64) := $(vmlinux-64) 78all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlinuz 79 80# 81# GCC uses -G 0 -mabicalls -fpic as default. We don't want PIC in the kernel 82# code since it only slows down the whole thing. At some point we might make 83# use of global pointer optimizations but their use of $28 conflicts with 84# the current pointer optimization. 85# 86# The DECStation requires an ECOFF kernel for remote booting, other MIPS 87# machines may also. Since BFD is incredibly buggy with respect to 88# crossformat linking we rely on the elf2ecoff tool for format conversion. 89# 90cflags-y += -G 0 -mno-abicalls -fno-pic -pipe 91cflags-y += -msoft-float 92LDFLAGS_vmlinux += -G 0 -static -n -nostdlib 93KBUILD_AFLAGS_MODULE += -mlong-calls 94KBUILD_CFLAGS_MODULE += -mlong-calls 95 96# 97# pass -msoft-float to GAS if it supports it. However on newer binutils 98# (specifically newer than 2.24.51.20140728) we then also need to explicitly 99# set ".set hardfloat" in all files which manipulate floating point registers. 100# 101ifneq ($(call as-option,-Wa$(comma)-msoft-float,),) 102 cflags-y += -DGAS_HAS_SET_HARDFLOAT -Wa,-msoft-float 103endif 104 105cflags-y += -ffreestanding 106 107# 108# We explicitly add the endianness specifier if needed, this allows 109# to compile kernels with a toolchain for the other endianness. We 110# carefully avoid to add it redundantly because gcc 3.3/3.4 complains 111# when fed the toolchain default! 112# 113# Certain gcc versions up to gcc 4.1.1 (probably 4.2-subversion as of 114# 2006-10-10 don't properly change the predefined symbols if -EB / -EL 115# are used, so we kludge that here. A bug has been filed at 116# http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29413. 117# 118undef-all += -UMIPSEB -U_MIPSEB -U__MIPSEB -U__MIPSEB__ 119undef-all += -UMIPSEL -U_MIPSEL -U__MIPSEL -U__MIPSEL__ 120predef-be += -DMIPSEB -D_MIPSEB -D__MIPSEB -D__MIPSEB__ 121predef-le += -DMIPSEL -D_MIPSEL -D__MIPSEL -D__MIPSEL__ 122cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' && echo -EB $(undef-all) $(predef-be)) 123cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' || echo -EL $(undef-all) $(predef-le)) 124 125cflags-$(CONFIG_SB1XXX_CORELIS) += $(call cc-option,-mno-sched-prolog) \ 126 -fno-omit-frame-pointer 127# 128# CPU-dependent compiler/assembler options for optimization. 129# 130cflags-$(CONFIG_CPU_R3000) += -march=r3000 131cflags-$(CONFIG_CPU_TX39XX) += -march=r3900 132cflags-$(CONFIG_CPU_R6000) += -march=r6000 -Wa,--trap 133cflags-$(CONFIG_CPU_R4300) += -march=r4300 -Wa,--trap 134cflags-$(CONFIG_CPU_VR41XX) += -march=r4100 -Wa,--trap 135cflags-$(CONFIG_CPU_R4X00) += -march=r4600 -Wa,--trap 136cflags-$(CONFIG_CPU_TX49XX) += -march=r4600 -Wa,--trap 137cflags-$(CONFIG_CPU_MIPS32_R1) += $(call cc-option,-march=mips32,-mips32 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \ 138 -Wa,-mips32 -Wa,--trap 139cflags-$(CONFIG_CPU_MIPS32_R2) += $(call cc-option,-march=mips32r2,-mips32r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \ 140 -Wa,-mips32r2 -Wa,--trap 141cflags-$(CONFIG_CPU_MIPS32_R6) += -march=mips32r6 -Wa,--trap -modd-spreg 142cflags-$(CONFIG_CPU_MIPS64_R1) += $(call cc-option,-march=mips64,-mips64 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \ 143 -Wa,-mips64 -Wa,--trap 144cflags-$(CONFIG_CPU_MIPS64_R2) += $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \ 145 -Wa,-mips64r2 -Wa,--trap 146cflags-$(CONFIG_CPU_MIPS64_R6) += -march=mips64r6 -Wa,--trap 147cflags-$(CONFIG_CPU_R5000) += -march=r5000 -Wa,--trap 148cflags-$(CONFIG_CPU_R5432) += $(call cc-option,-march=r5400,-march=r5000) \ 149 -Wa,--trap 150cflags-$(CONFIG_CPU_R5500) += $(call cc-option,-march=r5500,-march=r5000) \ 151 -Wa,--trap 152cflags-$(CONFIG_CPU_NEVADA) += $(call cc-option,-march=rm5200,-march=r5000) \ 153 -Wa,--trap 154cflags-$(CONFIG_CPU_RM7000) += $(call cc-option,-march=rm7000,-march=r5000) \ 155 -Wa,--trap 156cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-march=sb1,-march=r5000) \ 157 -Wa,--trap 158cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-mno-mdmx) 159cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-mno-mips3d) 160cflags-$(CONFIG_CPU_R8000) += -march=r8000 -Wa,--trap 161cflags-$(CONFIG_CPU_R10000) += $(call cc-option,-march=r10000,-march=r8000) \ 162 -Wa,--trap 163cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += $(call cc-option,-march=octeon) -Wa,--trap 164ifeq (,$(findstring march=octeon, $(cflags-$(CONFIG_CPU_CAVIUM_OCTEON)))) 165cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -Wa,-march=octeon 166endif 167cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1 168cflags-$(CONFIG_CPU_BMIPS) += -march=mips32 -Wa,-mips32 -Wa,--trap 169# 170# binutils from v2.25 on and gcc starting from v4.9.0 treat -march=loongson3a 171# as MIPS64 R1; older versions as just R1. This leaves the possibility open 172# that GCC might generate R2 code for -march=loongson3a which then is rejected 173# by GAS. The cc-option can't probe for this behaviour so -march=loongson3a 174# can't easily be used safely within the kbuild framework. 175# 176cflags-$(CONFIG_CPU_LOONGSON3) += \ 177 $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \ 178 -Wa,-mips64r2 -Wa,--trap 179 180cflags-$(CONFIG_CPU_R4000_WORKAROUNDS) += $(call cc-option,-mfix-r4000,) 181cflags-$(CONFIG_CPU_R4400_WORKAROUNDS) += $(call cc-option,-mfix-r4400,) 182cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS) += $(call cc-option,-mno-daddi,) 183 184# For smartmips configurations, there are hundreds of warnings due to ISA overrides 185# in assembly and header files. smartmips is only supported for MIPS32r1 onwards 186# and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or 187# similar directives in the kernel will spam the build logs with the following warnings: 188# Warning: the `smartmips' extension requires MIPS32 revision 1 or greater 189# or 190# Warning: the 64-bit MIPS architecture does not support the `smartmips' extension 191# Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has 192# been fixed properly. 193mips-cflags := $(cflags-y) 194ifeq ($(CONFIG_CPU_HAS_SMARTMIPS),y) 195smartmips-ase := $(call cc-option-yn,$(mips-cflags) -msmartmips) 196cflags-$(smartmips-ase) += -msmartmips -Wa,--no-warn 197endif 198ifeq ($(CONFIG_CPU_MICROMIPS),y) 199micromips-ase := $(call cc-option-yn,$(mips-cflags) -mmicromips) 200cflags-$(micromips-ase) += -mmicromips 201endif 202ifeq ($(CONFIG_CPU_HAS_MSA),y) 203toolchain-msa := $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa) 204cflags-$(toolchain-msa) += -DTOOLCHAIN_SUPPORTS_MSA 205endif 206 207# 208# Firmware support 209# 210libs-$(CONFIG_FW_ARC) += arch/mips/fw/arc/ 211libs-$(CONFIG_FW_CFE) += arch/mips/fw/cfe/ 212libs-$(CONFIG_FW_SNIPROM) += arch/mips/fw/sni/ 213libs-y += arch/mips/fw/lib/ 214 215# 216# Kernel compression 217# 218ifdef SYS_SUPPORTS_ZBOOT 219COMPRESSION_FNAME = vmlinuz 220else 221COMPRESSION_FNAME = vmlinux 222endif 223 224# 225# Board-dependent options and extra files 226# 227include arch/mips/Kbuild.platforms 228 229ifdef CONFIG_PHYSICAL_START 230load-y = $(CONFIG_PHYSICAL_START) 231endif 232entry-y = 0x$(shell $(NM) vmlinux 2>/dev/null \ 233 | grep "\bkernel_entry\b" | cut -f1 -d \ ) 234 235cflags-y += -I$(srctree)/arch/mips/include/asm/mach-generic 236drivers-$(CONFIG_PCI) += arch/mips/pci/ 237 238# 239# Automatically detect the build format. By default we choose 240# the elf format according to the load address. 241# We can always force a build with a 64-bits symbol format by 242# passing 'KBUILD_SYM32=no' option to the make's command line. 243# 244ifdef CONFIG_64BIT 245 ifndef KBUILD_SYM32 246 ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0) 247 KBUILD_SYM32 = y 248 endif 249 endif 250 251 ifeq ($(KBUILD_SYM32)$(call cc-option-yn,-msym32), yy) 252 cflags-y += -msym32 -DKBUILD_64BIT_SYM32 253 else 254 ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y) 255 $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32) 256 endif 257 endif 258endif 259 260KBUILD_AFLAGS += $(cflags-y) 261KBUILD_CFLAGS += $(cflags-y) 262KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y) 263KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0) 264 265bootvars-y = VMLINUX_LOAD_ADDRESS=$(load-y) \ 266 VMLINUX_ENTRY_ADDRESS=$(entry-y) \ 267 PLATFORM="$(platform-y)" 268ifdef CONFIG_32BIT 269bootvars-y += ADDR_BITS=32 270endif 271ifdef CONFIG_64BIT 272bootvars-y += ADDR_BITS=64 273endif 274 275LDFLAGS += -m $(ld-emul) 276 277ifdef CONFIG_MIPS 278CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \ 279 egrep -vw '__GNUC_(MINOR_|PATCHLEVEL_)?_' | \ 280 sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g') 281ifdef CONFIG_64BIT 282CHECKFLAGS += -m64 283endif 284endif 285 286OBJCOPYFLAGS += --remove-section=.reginfo 287 288head-y := arch/mips/kernel/head.o 289 290libs-y += arch/mips/lib/ 291libs-y += arch/mips/math-emu/ 292 293# See arch/mips/Kbuild for content of core part of the kernel 294core-y += arch/mips/ 295 296drivers-$(CONFIG_OPROFILE) += arch/mips/oprofile/ 297 298# suspend and hibernation support 299drivers-$(CONFIG_PM) += arch/mips/power/ 300 301# boot image targets (arch/mips/boot/) 302boot-y := vmlinux.bin 303boot-y += vmlinux.ecoff 304boot-y += vmlinux.srec 305ifeq ($(shell expr $(load-y) \< 0xffffffff80000000 2> /dev/null), 0) 306boot-y += uImage 307boot-y += uImage.bin 308boot-y += uImage.bz2 309boot-y += uImage.gz 310boot-y += uImage.lzma 311boot-y += uImage.lzo 312endif 313boot-y += vmlinux.itb 314boot-y += vmlinux.gz.itb 315boot-y += vmlinux.bz2.itb 316boot-y += vmlinux.lzma.itb 317boot-y += vmlinux.lzo.itb 318 319# compressed boot image targets (arch/mips/boot/compressed/) 320bootz-y := vmlinuz 321bootz-y += vmlinuz.bin 322bootz-y += vmlinuz.ecoff 323bootz-y += vmlinuz.srec 324 325ifdef CONFIG_LASAT 326rom.bin rom.sw: vmlinux 327 $(Q)$(MAKE) $(build)=arch/mips/lasat/image \ 328 $(bootvars-y) $@ 329endif 330 331# 332# Some machines like the Indy need 32-bit ELF binaries for booting purposes. 333# Other need ECOFF, so we build a 32-bit ELF binary for them which we then 334# convert to ECOFF using elf2ecoff. 335# 336quiet_cmd_32 = OBJCOPY $@ 337 cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@ 338vmlinux.32: vmlinux 339 $(call cmd,32) 340 341# 342# The 64-bit ELF tools are pretty broken so at this time we generate 64-bit 343# ELF files from 32-bit files by conversion. 344# 345quiet_cmd_64 = OBJCOPY $@ 346 cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@ 347vmlinux.64: vmlinux 348 $(call cmd,64) 349 350all: $(all-y) 351 352# boot 353$(boot-y): $(vmlinux-32) FORCE 354 $(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \ 355 $(bootvars-y) arch/mips/boot/$@ 356 357ifdef CONFIG_SYS_SUPPORTS_ZBOOT 358# boot/compressed 359$(bootz-y): $(vmlinux-32) FORCE 360 $(Q)$(MAKE) $(build)=arch/mips/boot/compressed \ 361 $(bootvars-y) 32bit-bfd=$(32bit-bfd) $@ 362else 363vmlinuz: FORCE 364 @echo ' CONFIG_SYS_SUPPORTS_ZBOOT is not enabled' 365 /bin/false 366endif 367 368 369CLEAN_FILES += vmlinux.32 vmlinux.64 370 371# device-trees 372core-$(CONFIG_BUILTIN_DTB) += arch/mips/boot/dts/ 373 374%.dtb %.dtb.S %.dtb.o: | scripts 375 $(Q)$(MAKE) $(build)=arch/mips/boot/dts arch/mips/boot/dts/$@ 376 377PHONY += dtbs 378dtbs: scripts 379 $(Q)$(MAKE) $(build)=arch/mips/boot/dts 380 381PHONY += dtbs_install 382dtbs_install: 383 $(Q)$(MAKE) $(dtbinst)=arch/mips/boot/dts 384 385archprepare: 386ifdef CONFIG_MIPS32_N32 387 @echo ' Checking missing-syscalls for N32' 388 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32" 389endif 390ifdef CONFIG_MIPS32_O32 391 @echo ' Checking missing-syscalls for O32' 392 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32" 393endif 394 395install: 396 $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE) 397ifdef CONFIG_SYS_SUPPORTS_ZBOOT 398 $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE) 399endif 400 $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE) 401 $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE) 402 403archclean: 404 $(Q)$(MAKE) $(clean)=arch/mips/boot 405 $(Q)$(MAKE) $(clean)=arch/mips/boot/compressed 406 $(Q)$(MAKE) $(clean)=arch/mips/lasat 407 408define archhelp 409 echo ' install - install kernel into $(INSTALL_PATH)' 410 echo ' vmlinux.ecoff - ECOFF boot image' 411 echo ' vmlinux.bin - Raw binary boot image' 412 echo ' vmlinux.srec - SREC boot image' 413 echo ' vmlinux.32 - 64-bit boot image wrapped in 32bits (IP22/IP32)' 414 echo ' vmlinuz - Compressed boot(zboot) image' 415 echo ' vmlinuz.ecoff - ECOFF zboot image' 416 echo ' vmlinuz.bin - Raw binary zboot image' 417 echo ' vmlinuz.srec - SREC zboot image' 418 echo ' uImage - U-Boot image' 419 echo ' uImage.bin - U-Boot image (uncompressed)' 420 echo ' uImage.bz2 - U-Boot image (bz2)' 421 echo ' uImage.gz - U-Boot image (gzip)' 422 echo ' uImage.lzma - U-Boot image (lzma)' 423 echo ' uImage.lzo - U-Boot image (lzo)' 424 echo ' dtbs - Device-tree blobs for enabled boards' 425 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)' 426 echo 427 echo ' These will be default as appropriate for a configured platform.' 428 echo 429 echo ' If you are targeting a system supported by generic kernels you may' 430 echo ' configure the kernel for a given architecture target like so:' 431 echo 432 echo ' {micro32,32,64}{r1,r2,r6}{el,}_defconfig <BOARDS="list of boards">' 433 echo 434 echo ' Otherwise, the following default configurations are available:' 435endef 436 437generic_config_dir = $(srctree)/arch/$(ARCH)/configs/generic 438generic_defconfigs := 439 440# 441# If the user generates a generic kernel configuration without specifying a 442# list of boards to include the config fragments for, default to including all 443# available board config fragments. 444# 445ifeq ($(BOARDS),) 446BOARDS = $(patsubst board-%.config,%,$(notdir $(wildcard $(generic_config_dir)/board-*.config))) 447endif 448 449# 450# Generic kernel configurations which merge generic_defconfig with the 451# appropriate config fragments from arch/mips/configs/generic/, resulting in 452# the ability to easily configure the kernel for a given architecture, 453# endianness & set of boards without duplicating the needed configuration in 454# hundreds of defconfig files. 455# 456define gen_generic_defconfigs 457$(foreach bits,$(1),$(foreach rev,$(2),$(foreach endian,$(3), 458target := $(bits)$(rev)$(filter el,$(endian))_defconfig 459generic_defconfigs += $$(target) 460$$(target): $(generic_config_dir)/$(bits)$(rev).config 461$$(target): $(generic_config_dir)/$(endian).config 462))) 463endef 464 465$(eval $(call gen_generic_defconfigs,32 64,r1 r2 r6,eb el)) 466$(eval $(call gen_generic_defconfigs,micro32,r2,eb el)) 467 468.PHONY: $(generic_defconfigs) 469$(generic_defconfigs): 470 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ 471 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/generic_defconfig $^ \ 472 $(foreach board,$(BOARDS),$(generic_config_dir)/board-$(board).config) 473 $(Q)$(MAKE) olddefconfig 474 475# 476# Prevent generic merge_config rules attempting to merge single fragments 477# 478$(generic_config_dir)/%.config: ; 479