arch/mips/Makefile

   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
  15 KBUILD_DEFCONFIG := ip22_defconfig
  16
  17 #
  18 # Select the object file format to substitute into the linker script.
  19 #
  20 ifdef CONFIG_CPU_LITTLE_ENDIAN
  21 32bit-tool-archpref     = mipsel
  22 64bit-tool-archpref     = mips64el
  23 32bit-bfd               = elf32-tradlittlemips
  24 64bit-bfd               = elf64-tradlittlemips
  25 32bit-emul              = elf32ltsmip
  26 64bit-emul              = elf64ltsmip
  27 else
  28 32bit-tool-archpref     = mips
  29 64bit-tool-archpref     = mips64
  30 32bit-bfd               = elf32-tradbigmips
  31 64bit-bfd               = elf64-tradbigmips
  32 32bit-emul              = elf32btsmip
  33 64bit-emul              = elf64btsmip
  34 endif
  35
  36 ifdef CONFIG_32BIT
  37 tool-archpref           = $(32bit-tool-archpref)
  38 UTS_MACHINE             := mips
  39 endif
  40 ifdef CONFIG_64BIT
  41 tool-archpref           = $(64bit-tool-archpref)
  42 UTS_MACHINE             := mips64
  43 endif
  44
  45 ifneq ($(SUBARCH),$(ARCH))
  46   ifeq ($(CROSS_COMPILE),)
  47     CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux-  $(tool-archpref)-linux-gnu-  $(tool-archpref)-unknown-linux-gnu-)
  48   endif
  49 endif
  50
  51 ifdef CONFIG_FUNCTION_GRAPH_TRACER
  52   ifndef KBUILD_MCOUNT_RA_ADDRESS
  53     ifeq ($(call cc-option-yn,-mmcount-ra-address), y)
  54       cflags-y += -mmcount-ra-address -DKBUILD_MCOUNT_RA_ADDRESS
  55     endif
  56   endif
  57 endif
  58 cflags-y += $(call cc-option, -mno-check-zero-division)
  59
  60 ifdef CONFIG_32BIT
  61 ld-emul                 = $(32bit-emul)
  62 vmlinux-32              = vmlinux
  63 vmlinux-64              = vmlinux.64
  64
  65 cflags-y                += -mabi=32
  66 endif
  67
  68 ifdef CONFIG_64BIT
  69 ld-emul                 = $(64bit-emul)
  70 vmlinux-32              = vmlinux.32
  71 vmlinux-64              = vmlinux
  72
  73 cflags-y                += -mabi=64
  74 endif
  75
  76 all-$(CONFIG_BOOT_ELF32)        := $(vmlinux-32)
  77 all-$(CONFIG_BOOT_ELF64)        := $(vmlinux-64)
  78 all-$(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 $28 conflicts with
  84 # the current pointer optimization.
  85 #
  86 # The DECStation requires an ECOFF kernel for remote booting, other MIPS
  87 # machines may also.  Since BFD is incredibly buggy with respect to
  88 # crossformat linking we rely on the elf2ecoff tool for format conversion.
  89 #
  90 cflags-y                        += -G 0 -mno-abicalls -fno-pic -pipe
  91 cflags-y                        += -msoft-float
  92 LDFLAGS_vmlinux                 += -G 0 -static -n -nostdlib
  93 KBUILD_AFLAGS_MODULE            += -mlong-calls
  94 KBUILD_CFLAGS_MODULE            += -mlong-calls
  95
  96 #
  97 # pass -msoft-float to GAS if it supports it.  However on newer binutils
  98 # (specifically newer than 2.24.51.20140728) we then also need to explicitly
  99 # set ".set hardfloat" in all files which manipulate floating point registers.
 100 #
 101 ifneq ($(call as-option,-Wa$(comma)-msoft-float,),)
 102         cflags-y                += -DGAS_HAS_SET_HARDFLOAT -Wa,-msoft-float
 103 endif
 104
 105 cflags-y += -ffreestanding
 106
 107 #
 108 # We explicitly add the endianness specifier if needed, this allows
 109 # to compile kernels with a toolchain for the other endianness. We
 110 # carefully avoid to add it redundantly because gcc 3.3/3.4 complains
 111 # when fed the toolchain default!
 112 #
 113 # Certain gcc versions up to gcc 4.1.1 (probably 4.2-subversion as of
 114 # 2006-10-10 don't properly change the predefined symbols if -EB / -EL
 115 # are used, so we kludge that here.  A bug has been filed at
 116 # http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29413.
 117 #
 118 undef-all += -UMIPSEB -U_MIPSEB -U__MIPSEB -U__MIPSEB__
 119 undef-all += -UMIPSEL -U_MIPSEL -U__MIPSEL -U__MIPSEL__
 120 predef-be += -DMIPSEB -D_MIPSEB -D__MIPSEB -D__MIPSEB__
 121 predef-le += -DMIPSEL -D_MIPSEL -D__MIPSEL -D__MIPSEL__
 122 cflags-$(CONFIG_CPU_BIG_ENDIAN)         += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' && echo -EB $(undef-all) $(predef-be))
 123 cflags-$(CONFIG_CPU_LITTLE_ENDIAN)      += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' || echo -EL $(undef-all) $(predef-le))
 124
 125 cflags-$(CONFIG_SB1XXX_CORELIS) += $(call cc-option,-mno-sched-prolog) \
 126                                    -fno-omit-frame-pointer
 127 #
 128 # CPU-dependent compiler/assembler options for optimization.
 129 #
 130 cflags-$(CONFIG_CPU_R3000)      += -march=r3000
 131 cflags-$(CONFIG_CPU_TX39XX)     += -march=r3900
 132 cflags-$(CONFIG_CPU_R6000)      += -march=r6000 -Wa,--trap
 133 cflags-$(CONFIG_CPU_R4300)      += -march=r4300 -Wa,--trap
 134 cflags-$(CONFIG_CPU_VR41XX)     += -march=r4100 -Wa,--trap
 135 cflags-$(CONFIG_CPU_R4X00)      += -march=r4600 -Wa,--trap
 136 cflags-$(CONFIG_CPU_TX49XX)     += -march=r4600 -Wa,--trap
 137 cflags-$(CONFIG_CPU_MIPS32_R1)  += $(call cc-option,-march=mips32,-mips32 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
 138                         -Wa,-mips32 -Wa,--trap
 139 cflags-$(CONFIG_CPU_MIPS32_R2)  += $(call cc-option,-march=mips32r2,-mips32r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
 140                         -Wa,-mips32r2 -Wa,--trap
 141 cflags-$(CONFIG_CPU_MIPS32_R6)  += -march=mips32r6 -Wa,--trap
 142 cflags-$(CONFIG_CPU_MIPS64_R1)  += $(call cc-option,-march=mips64,-mips64 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
 143                         -Wa,-mips64 -Wa,--trap
 144 cflags-$(CONFIG_CPU_MIPS64_R2)  += $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
 145                         -Wa,-mips64r2 -Wa,--trap
 146 cflags-$(CONFIG_CPU_MIPS64_R6)  += -march=mips64r6 -Wa,--trap
 147 cflags-$(CONFIG_CPU_R5000)      += -march=r5000 -Wa,--trap
 148 cflags-$(CONFIG_CPU_R5432)      += $(call cc-option,-march=r5400,-march=r5000) \
 149                         -Wa,--trap
 150 cflags-$(CONFIG_CPU_R5500)      += $(call cc-option,-march=r5500,-march=r5000) \
 151                         -Wa,--trap
 152 cflags-$(CONFIG_CPU_NEVADA)     += $(call cc-option,-march=rm5200,-march=r5000) \
 153                         -Wa,--trap
 154 cflags-$(CONFIG_CPU_RM7000)     += $(call cc-option,-march=rm7000,-march=r5000) \
 155                         -Wa,--trap
 156 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-march=sb1,-march=r5000) \
 157                         -Wa,--trap
 158 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-mno-mdmx)
 159 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-mno-mips3d)
 160 cflags-$(CONFIG_CPU_R8000)      += -march=r8000 -Wa,--trap
 161 cflags-$(CONFIG_CPU_R10000)     += $(call cc-option,-march=r10000,-march=r8000) \
 162                         -Wa,--trap
 163 cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += $(call cc-option,-march=octeon) -Wa,--trap
 164 ifeq (,$(findstring march=octeon, $(cflags-$(CONFIG_CPU_CAVIUM_OCTEON))))
 165 cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -Wa,-march=octeon
 166 endif
 167 cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1
 168 cflags-$(CONFIG_CPU_BMIPS)      += -march=mips32 -Wa,-mips32 -Wa,--trap
 169 #
 170 # binutils from v2.25 on and gcc starting from v4.9.0 treat -march=loongson3a
 171 # as MIPS64 R1; older versions as just R1.  This leaves the possibility open
 172 # that GCC might generate R2 code for -march=loongson3a which then is rejected
 173 # by GAS.  The cc-option can't probe for this behaviour so -march=loongson3a
 174 # can't easily be used safely within the kbuild framework.
 175 #
 176 cflags-$(CONFIG_CPU_LOONGSON3)  +=                                      \
 177         $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
 178         -Wa,-mips64r2 -Wa,--trap
 179
 180 cflags-$(CONFIG_CPU_R4000_WORKAROUNDS)  += $(call cc-option,-mfix-r4000,)
 181 cflags-$(CONFIG_CPU_R4400_WORKAROUNDS)  += $(call cc-option,-mfix-r4400,)
 182 cflags-$(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.
 193 mips-cflags                             := $(cflags-y)
 194 ifeq ($(CONFIG_CPU_HAS_SMARTMIPS),y)
 195 smartmips-ase                           := $(call cc-option-yn,$(mips-cflags) -msmartmips)
 196 cflags-$(smartmips-ase)                 += -msmartmips -Wa,--no-warn
 197 endif
 198 ifeq ($(CONFIG_CPU_MICROMIPS),y)
 199 micromips-ase                           := $(call cc-option-yn,$(mips-cflags) -mmicromips)
 200 cflags-$(micromips-ase)                 += -mmicromips
 201 endif
 202 ifeq ($(CONFIG_CPU_HAS_MSA),y)
 203 toolchain-msa                           := $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa)
 204 cflags-$(toolchain-msa)                 += -DTOOLCHAIN_SUPPORTS_MSA
 205 endif
 206
 207 cflags-$(CONFIG_MIPS_COMPACT_BRANCHES_NEVER)    += -mcompact-branches=never
 208 cflags-$(CONFIG_MIPS_COMPACT_BRANCHES_OPTIMAL)  += -mcompact-branches=optimal
 209 cflags-$(CONFIG_MIPS_COMPACT_BRANCHES_ALWAYS)   += -mcompact-branches=always
 210
 211 #
 212 # Firmware support
 213 #
 214 libs-$(CONFIG_FW_ARC)           += arch/mips/fw/arc/
 215 libs-$(CONFIG_FW_CFE)           += arch/mips/fw/cfe/
 216 libs-$(CONFIG_FW_SNIPROM)       += arch/mips/fw/sni/
 217 libs-y                          += arch/mips/fw/lib/
 218
 219 #
 220 # Kernel compression
 221 #
 222 ifdef SYS_SUPPORTS_ZBOOT
 223 COMPRESSION_FNAME               = vmlinuz
 224 else
 225 COMPRESSION_FNAME               = vmlinux
 226 endif
 227
 228 #
 229 # Board-dependent options and extra files
 230 #
 231 include arch/mips/Kbuild.platforms
 232
 233 ifdef CONFIG_PHYSICAL_START
 234 load-y                                  = $(CONFIG_PHYSICAL_START)
 235 endif
 236 entry-y                         = 0x$(shell $(NM) vmlinux 2>/dev/null \
 237                                         | grep "\bkernel_entry\b" | cut -f1 -d \ )
 238
 239 cflags-y                        += -I$(srctree)/arch/mips/include/asm/mach-generic
 240 drivers-$(CONFIG_PCI)           += arch/mips/pci/
 241
 242 #
 243 # Automatically detect the build format. By default we choose
 244 # the elf format according to the load address.
 245 # We can always force a build with a 64-bits symbol format by
 246 # passing 'KBUILD_SYM32=no' option to the make's command line.
 247 #
 248 ifdef CONFIG_64BIT
 249   ifndef KBUILD_SYM32
 250     ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0)
 251       KBUILD_SYM32 = y
 252     endif
 253   endif
 254
 255   ifeq ($(KBUILD_SYM32)$(call cc-option-yn,-msym32), yy)
 256     cflags-y += -msym32 -DKBUILD_64BIT_SYM32
 257   else
 258     ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
 259       $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
 260     endif
 261   endif
 262 endif
 263
 264 KBUILD_AFLAGS   += $(cflags-y)
 265 KBUILD_CFLAGS   += $(cflags-y)
 266 KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y)
 267 KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
 268
 269 bootvars-y      = VMLINUX_LOAD_ADDRESS=$(load-y) \
 270                   VMLINUX_ENTRY_ADDRESS=$(entry-y)
 271
 272 LDFLAGS                 += -m $(ld-emul)
 273
 274 ifdef CONFIG_MIPS
 275 CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
 276         egrep -vw '__GNUC_(|MINOR_|PATCHLEVEL_)_' | \
 277         sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
 278 ifdef CONFIG_64BIT
 279 CHECKFLAGS              += -m64
 280 endif
 281 endif
 282
 283 OBJCOPYFLAGS            += --remove-section=.reginfo
 284
 285 head-y := arch/mips/kernel/head.o
 286
 287 libs-y                  += arch/mips/lib/
 288 libs-y                  += arch/mips/math-emu/
 289
 290 # See arch/mips/Kbuild for content of core part of the kernel
 291 core-y += arch/mips/
 292
 293 drivers-$(CONFIG_OPROFILE)      += arch/mips/oprofile/
 294
 295 # suspend and hibernation support
 296 drivers-$(CONFIG_PM)    += arch/mips/power/
 297
 298 # boot image targets (arch/mips/boot/)
 299 boot-y                  := vmlinux.bin
 300 boot-y                  += vmlinux.ecoff
 301 boot-y                  += vmlinux.srec
 302 ifeq ($(shell expr $(load-y) \< 0xffffffff80000000 2> /dev/null), 0)
 303 boot-y                  += uImage
 304 boot-y                  += uImage.bin
 305 boot-y                  += uImage.bz2
 306 boot-y                  += uImage.gz
 307 boot-y                  += uImage.lzma
 308 boot-y                  += uImage.lzo
 309 endif
 310
 311 # compressed boot image targets (arch/mips/boot/compressed/)
 312 bootz-y                 := vmlinuz
 313 bootz-y                 += vmlinuz.bin
 314 bootz-y                 += vmlinuz.ecoff
 315 bootz-y                 += vmlinuz.srec
 316
 317 ifdef CONFIG_LASAT
 318 rom.bin rom.sw: vmlinux
 319         $(Q)$(MAKE) $(build)=arch/mips/lasat/image \
 320                 $(bootvars-y) $@
 321 endif
 322
 323 #
 324 # Some machines like the Indy need 32-bit ELF binaries for booting purposes.
 325 # Other need ECOFF, so we build a 32-bit ELF binary for them which we then
 326 # convert to ECOFF using elf2ecoff.
 327 #
 328 quiet_cmd_32 = OBJCOPY $@
 329         cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
 330 vmlinux.32: vmlinux
 331         $(call cmd,32)
 332
 333 #
 334 # The 64-bit ELF tools are pretty broken so at this time we generate 64-bit
 335 # ELF files from 32-bit files by conversion.
 336 #
 337 quiet_cmd_64 = OBJCOPY $@
 338         cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@
 339 vmlinux.64: vmlinux
 340         $(call cmd,64)
 341
 342 all:    $(all-y)
 343
 344 # boot
 345 $(boot-y): $(vmlinux-32) FORCE
 346         $(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \
 347                 $(bootvars-y) arch/mips/boot/$@
 348
 349 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
 350 # boot/compressed
 351 $(bootz-y): $(vmlinux-32) FORCE
 352         $(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
 353                 $(bootvars-y) 32bit-bfd=$(32bit-bfd) $@
 354 else
 355 vmlinuz: FORCE
 356         @echo '   CONFIG_SYS_SUPPORTS_ZBOOT is not enabled'
 357         /bin/false
 358 endif
 359
 360
 361 CLEAN_FILES += vmlinux.32 vmlinux.64
 362
 363 # device-trees
 364 core-$(CONFIG_BUILTIN_DTB) += arch/mips/boot/dts/
 365
 366 %.dtb %.dtb.S %.dtb.o: | scripts
 367         $(Q)$(MAKE) $(build)=arch/mips/boot/dts arch/mips/boot/dts/$@
 368
 369 PHONY += dtbs
 370 dtbs: scripts
 371         $(Q)$(MAKE) $(build)=arch/mips/boot/dts
 372
 373 PHONY += dtbs_install
 374 dtbs_install:
 375         $(Q)$(MAKE) $(dtbinst)=arch/mips/boot/dts
 376
 377 archprepare:
 378 ifdef CONFIG_MIPS32_N32
 379         @echo '  Checking missing-syscalls for N32'
 380         $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32"
 381 endif
 382 ifdef CONFIG_MIPS32_O32
 383         @echo '  Checking missing-syscalls for O32'
 384         $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32"
 385 endif
 386
 387 install:
 388         $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
 389 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
 390         $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
 391 endif
 392         $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
 393         $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
 394
 395 archclean:
 396         $(Q)$(MAKE) $(clean)=arch/mips/boot
 397         $(Q)$(MAKE) $(clean)=arch/mips/boot/compressed
 398         $(Q)$(MAKE) $(clean)=arch/mips/lasat
 399
 400 define archhelp
 401         echo '  install              - install kernel into $(INSTALL_PATH)'
 402         echo '  vmlinux.ecoff        - ECOFF boot image'
 403         echo '  vmlinux.bin          - Raw binary boot image'
 404         echo '  vmlinux.srec         - SREC boot image'
 405         echo '  vmlinux.32           - 64-bit boot image wrapped in 32bits (IP22/IP32)'
 406         echo '  vmlinuz              - Compressed boot(zboot) image'
 407         echo '  vmlinuz.ecoff        - ECOFF zboot image'
 408         echo '  vmlinuz.bin          - Raw binary zboot image'
 409         echo '  vmlinuz.srec         - SREC zboot image'
 410         echo '  uImage               - U-Boot image'
 411         echo '  uImage.bin           - U-Boot image (uncompressed)'
 412         echo '  uImage.bz2           - U-Boot image (bz2)'
 413         echo '  uImage.gz            - U-Boot image (gzip)'
 414         echo '  uImage.lzma          - U-Boot image (lzma)'
 415         echo '  uImage.lzo           - U-Boot image (lzo)'
 416         echo '  dtbs                 - Device-tree blobs for enabled boards'
 417         echo '  dtbs_install         - Install dtbs to $(INSTALL_DTBS_PATH)'
 418         echo
 419         echo '  These will be default as appropriate for a configured platform.'
 420 endef