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 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) += $(call cc-option,-mno-daddi,) 183 184ifdef CONFIG_CPU_SB1 185ifdef CONFIG_SB1_PASS_1_WORKAROUNDS 186KBUILD_AFLAGS_MODULE += -msb1-pass1-workarounds 187KBUILD_CFLAGS_MODULE += -msb1-pass1-workarounds 188endif 189endif 190 191# For smartmips configurations, there are hundreds of warnings due to ISA overrides 192# in assembly and header files. smartmips is only supported for MIPS32r1 onwards 193# and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or 194# similar directives in the kernel will spam the build logs with the following warnings: 195# Warning: the `smartmips' extension requires MIPS32 revision 1 or greater 196# or 197# Warning: the 64-bit MIPS architecture does not support the `smartmips' extension 198# Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has 199# been fixed properly. 200mips-cflags := "$(cflags-y)" 201cflags-$(CONFIG_CPU_HAS_SMARTMIPS) += $(call cc-option,$(mips-cflags),-msmartmips) -Wa,--no-warn 202cflags-$(CONFIG_CPU_MICROMIPS) += $(call cc-option,$(mips-cflags),-mmicromips) 203ifeq ($(CONFIG_CPU_HAS_MSA),y) 204toolchain-msa := $(call cc-option-yn,-$(mips-cflags),mhard-float -mfp64 -Wa$(comma)-mmsa) 205cflags-$(toolchain-msa) += -DTOOLCHAIN_SUPPORTS_MSA 206endif 207 208# 209# Firmware support 210# 211libs-$(CONFIG_FW_ARC) += arch/mips/fw/arc/ 212libs-$(CONFIG_FW_CFE) += arch/mips/fw/cfe/ 213libs-$(CONFIG_FW_SNIPROM) += arch/mips/fw/sni/ 214libs-y += arch/mips/fw/lib/ 215 216# 217# Kernel compression 218# 219ifdef SYS_SUPPORTS_ZBOOT 220COMPRESSION_FNAME = vmlinuz 221else 222COMPRESSION_FNAME = vmlinux 223endif 224 225# 226# Board-dependent options and extra files 227# 228include $(srctree)/arch/mips/Kbuild.platforms 229 230ifdef CONFIG_PHYSICAL_START 231load-y = $(CONFIG_PHYSICAL_START) 232endif 233entry-y = 0x$(shell $(NM) vmlinux 2>/dev/null \ 234 | grep "\bkernel_entry\b" | cut -f1 -d \ ) 235 236cflags-y += -I$(srctree)/arch/mips/include/asm/mach-generic 237drivers-$(CONFIG_PCI) += arch/mips/pci/ 238 239# 240# Automatically detect the build format. By default we choose 241# the elf format according to the load address. 242# We can always force a build with a 64-bits symbol format by 243# passing 'KBUILD_SYM32=no' option to the make's command line. 244# 245ifdef CONFIG_64BIT 246 ifndef KBUILD_SYM32 247 ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0) 248 KBUILD_SYM32 = y 249 endif 250 endif 251 252 ifeq ($(KBUILD_SYM32)$(call cc-option-yn,-msym32), yy) 253 cflags-y += -msym32 -DKBUILD_64BIT_SYM32 254 else 255 ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y) 256 $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32) 257 endif 258 endif 259endif 260 261KBUILD_AFLAGS += $(cflags-y) 262KBUILD_CFLAGS += $(cflags-y) 263KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y) 264KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0) 265 266bootvars-y = VMLINUX_LOAD_ADDRESS=$(load-y) \ 267 VMLINUX_ENTRY_ADDRESS=$(entry-y) 268 269LDFLAGS += -m $(ld-emul) 270 271ifdef CONFIG_MIPS 272CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \ 273 egrep -vw '__GNUC_(|MINOR_|PATCHLEVEL_)_' | \ 274 sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/") 275ifdef CONFIG_64BIT 276CHECKFLAGS += -m64 277endif 278endif 279 280OBJCOPYFLAGS += --remove-section=.reginfo 281 282head-y := arch/mips/kernel/head.o 283 284libs-y += arch/mips/lib/ 285libs-y += arch/mips/math-emu/ 286 287# See arch/mips/Kbuild for content of core part of the kernel 288core-y += arch/mips/ 289 290drivers-$(CONFIG_OPROFILE) += arch/mips/oprofile/ 291 292# suspend and hibernation support 293drivers-$(CONFIG_PM) += arch/mips/power/ 294 295# boot image targets (arch/mips/boot/) 296boot-y := vmlinux.bin 297boot-y += vmlinux.ecoff 298boot-y += vmlinux.srec 299ifeq ($(shell expr $(load-y) \< 0xffffffff80000000 2> /dev/null), 0) 300boot-y += uImage 301boot-y += uImage.bin 302boot-y += uImage.bz2 303boot-y += uImage.gz 304boot-y += uImage.lzma 305boot-y += uImage.lzo 306endif 307 308# compressed boot image targets (arch/mips/boot/compressed/) 309bootz-y := vmlinuz 310bootz-y += vmlinuz.bin 311bootz-y += vmlinuz.ecoff 312bootz-y += vmlinuz.srec 313 314ifdef CONFIG_LASAT 315rom.bin rom.sw: vmlinux 316 $(Q)$(MAKE) $(build)=arch/mips/lasat/image \ 317 $(bootvars-y) $@ 318endif 319 320# 321# Some machines like the Indy need 32-bit ELF binaries for booting purposes. 322# Other need ECOFF, so we build a 32-bit ELF binary for them which we then 323# convert to ECOFF using elf2ecoff. 324# 325quiet_cmd_32 = OBJCOPY $@ 326 cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@ 327vmlinux.32: vmlinux 328 $(call cmd,32) 329 330# 331# The 64-bit ELF tools are pretty broken so at this time we generate 64-bit 332# ELF files from 32-bit files by conversion. 333# 334quiet_cmd_64 = OBJCOPY $@ 335 cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@ 336vmlinux.64: vmlinux 337 $(call cmd,64) 338 339all: $(all-y) 340 341# boot 342$(boot-y): $(vmlinux-32) FORCE 343 $(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \ 344 $(bootvars-y) arch/mips/boot/$@ 345 346ifdef CONFIG_SYS_SUPPORTS_ZBOOT 347# boot/compressed 348$(bootz-y): $(vmlinux-32) FORCE 349 $(Q)$(MAKE) $(build)=arch/mips/boot/compressed \ 350 $(bootvars-y) 32bit-bfd=$(32bit-bfd) $@ 351else 352vmlinuz: FORCE 353 @echo ' CONFIG_SYS_SUPPORTS_ZBOOT is not enabled' 354 /bin/false 355endif 356 357 358CLEAN_FILES += vmlinux.32 vmlinux.64 359 360# device-trees 361core-$(CONFIG_BUILTIN_DTB) += arch/mips/boot/dts/ 362 363%.dtb %.dtb.S %.dtb.o: | scripts 364 $(Q)$(MAKE) $(build)=arch/mips/boot/dts arch/mips/boot/dts/$@ 365 366PHONY += dtbs 367dtbs: scripts 368 $(Q)$(MAKE) $(build)=arch/mips/boot/dts dtbs 369 370archprepare: 371ifdef CONFIG_MIPS32_N32 372 @echo ' Checking missing-syscalls for N32' 373 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32" 374endif 375ifdef CONFIG_MIPS32_O32 376 @echo ' Checking missing-syscalls for O32' 377 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32" 378endif 379 380install: 381 $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE) 382ifdef CONFIG_SYS_SUPPORTS_ZBOOT 383 $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE) 384endif 385 $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE) 386 $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE) 387 388archclean: 389 $(Q)$(MAKE) $(clean)=arch/mips/boot 390 $(Q)$(MAKE) $(clean)=arch/mips/boot/compressed 391 $(Q)$(MAKE) $(clean)=arch/mips/lasat 392 393define archhelp 394 echo ' install - install kernel into $(INSTALL_PATH)' 395 echo ' vmlinux.ecoff - ECOFF boot image' 396 echo ' vmlinux.bin - Raw binary boot image' 397 echo ' vmlinux.srec - SREC boot image' 398 echo ' vmlinux.32 - 64-bit boot image wrapped in 32bits (IP22/IP32)' 399 echo ' vmlinuz - Compressed boot(zboot) image' 400 echo ' vmlinuz.ecoff - ECOFF zboot image' 401 echo ' vmlinuz.bin - Raw binary zboot image' 402 echo ' vmlinuz.srec - SREC zboot image' 403 echo ' uImage - U-Boot image' 404 echo ' uImage.bin - U-Boot image (uncompressed)' 405 echo ' uImage.bz2 - U-Boot image (bz2)' 406 echo ' uImage.gz - U-Boot image (gzip)' 407 echo ' uImage.lzma - U-Boot image (lzma)' 408 echo ' uImage.lzo - U-Boot image (lzo)' 409 echo ' dtbs - Device-tree blobs for enabled boards' 410 echo 411 echo ' These will be default as appropriate for a configured platform.' 412endef 413