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 archscripts: scripts_basic
  16         $(Q)$(MAKE) $(build)=arch/mips/boot/tools relocs
  17
  18 KBUILD_DEFCONFIG := ip22_defconfig
  19
  20 #
  21 # Select the object file format to substitute into the linker script.
  22 #
  23 ifdef CONFIG_CPU_LITTLE_ENDIAN
  24 32bit-tool-archpref     = mipsel
  25 64bit-tool-archpref     = mips64el
  26 32bit-bfd               = elf32-tradlittlemips
  27 64bit-bfd               = elf64-tradlittlemips
  28 32bit-emul              = elf32ltsmip
  29 64bit-emul              = elf64ltsmip
  30 else
  31 32bit-tool-archpref     = mips
  32 64bit-tool-archpref     = mips64
  33 32bit-bfd               = elf32-tradbigmips
  34 64bit-bfd               = elf64-tradbigmips
  35 32bit-emul              = elf32btsmip
  36 64bit-emul              = elf64btsmip
  37 endif
  38
  39 ifdef CONFIG_32BIT
  40 tool-archpref           = $(32bit-tool-archpref)
  41 UTS_MACHINE             := mips
  42 endif
  43 ifdef CONFIG_64BIT
  44 tool-archpref           = $(64bit-tool-archpref)
  45 UTS_MACHINE             := mips64
  46 endif
  47
  48 ifneq ($(SUBARCH),$(ARCH))
  49   ifeq ($(CROSS_COMPILE),)
  50     CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux-  $(tool-archpref)-linux-gnu-  $(tool-archpref)-unknown-linux-gnu-)
  51   endif
  52 endif
  53
  54 ifdef CONFIG_FUNCTION_GRAPH_TRACER
  55   ifndef KBUILD_MCOUNT_RA_ADDRESS
  56     ifeq ($(call cc-option-yn,-mmcount-ra-address), y)
  57       cflags-y += -mmcount-ra-address -DKBUILD_MCOUNT_RA_ADDRESS
  58     endif
  59   endif
  60 endif
  61 cflags-y += $(call cc-option, -mno-check-zero-division)
  62
  63 ifdef CONFIG_32BIT
  64 ld-emul                 = $(32bit-emul)
  65 vmlinux-32              = vmlinux
  66 vmlinux-64              = vmlinux.64
  67
  68 cflags-y                += -mabi=32
  69 endif
  70
  71 ifdef CONFIG_64BIT
  72 ld-emul                 = $(64bit-emul)
  73 vmlinux-32              = vmlinux.32
  74 vmlinux-64              = vmlinux
  75
  76 cflags-y                += -mabi=64
  77 endif
  78
  79 all-$(CONFIG_BOOT_ELF32)        := $(vmlinux-32)
  80 all-$(CONFIG_BOOT_ELF64)        := $(vmlinux-64)
  81 all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlinuz
  82
  83 #
  84 # GCC uses -G 0 -mabicalls -fpic as default.  We don't want PIC in the kernel
  85 # code since it only slows down the whole thing.  At some point we might make
  86 # use of global pointer optimizations but their use of $28 conflicts with
  87 # the current pointer optimization.
  88 #
  89 # The DECStation requires an ECOFF kernel for remote booting, other MIPS
  90 # machines may also.  Since BFD is incredibly buggy with respect to
  91 # crossformat linking we rely on the elf2ecoff tool for format conversion.
  92 #
  93 cflags-y                        += -G 0 -mno-abicalls -fno-pic -pipe
  94 cflags-y                        += -msoft-float
  95 LDFLAGS_vmlinux                 += -G 0 -static -n -nostdlib
  96 KBUILD_AFLAGS_MODULE            += -mlong-calls
  97 KBUILD_CFLAGS_MODULE            += -mlong-calls
  98
  99 #
 100 # pass -msoft-float to GAS if it supports it.  However on newer binutils
 101 # (specifically newer than 2.24.51.20140728) we then also need to explicitly
 102 # set ".set hardfloat" in all files which manipulate floating point registers.
 103 #
 104 ifneq ($(call as-option,-Wa$(comma)-msoft-float,),)
 105         cflags-y                += -DGAS_HAS_SET_HARDFLOAT -Wa,-msoft-float
 106 endif
 107
 108 cflags-y += -ffreestanding
 109
 110 #
 111 # We explicitly add the endianness specifier if needed, this allows
 112 # to compile kernels with a toolchain for the other endianness. We
 113 # carefully avoid to add it redundantly because gcc 3.3/3.4 complains
 114 # when fed the toolchain default!
 115 #
 116 # Certain gcc versions up to gcc 4.1.1 (probably 4.2-subversion as of
 117 # 2006-10-10 don't properly change the predefined symbols if -EB / -EL
 118 # are used, so we kludge that here.  A bug has been filed at
 119 # http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29413.
 120 #
 121 undef-all += -UMIPSEB -U_MIPSEB -U__MIPSEB -U__MIPSEB__
 122 undef-all += -UMIPSEL -U_MIPSEL -U__MIPSEL -U__MIPSEL__
 123 predef-be += -DMIPSEB -D_MIPSEB -D__MIPSEB -D__MIPSEB__
 124 predef-le += -DMIPSEL -D_MIPSEL -D__MIPSEL -D__MIPSEL__
 125 cflags-$(CONFIG_CPU_BIG_ENDIAN)         += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' && echo -EB $(undef-all) $(predef-be))
 126 cflags-$(CONFIG_CPU_LITTLE_ENDIAN)      += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' || echo -EL $(undef-all) $(predef-le))
 127
 128 cflags-$(CONFIG_SB1XXX_CORELIS) += $(call cc-option,-mno-sched-prolog) \
 129                                    -fno-omit-frame-pointer
 130 #
 131 # CPU-dependent compiler/assembler options for optimization.
 132 #
 133 cflags-$(CONFIG_CPU_R3000)      += -march=r3000
 134 cflags-$(CONFIG_CPU_TX39XX)     += -march=r3900
 135 cflags-$(CONFIG_CPU_R6000)      += -march=r6000 -Wa,--trap
 136 cflags-$(CONFIG_CPU_R4300)      += -march=r4300 -Wa,--trap
 137 cflags-$(CONFIG_CPU_VR41XX)     += -march=r4100 -Wa,--trap
 138 cflags-$(CONFIG_CPU_R4X00)      += -march=r4600 -Wa,--trap
 139 cflags-$(CONFIG_CPU_TX49XX)     += -march=r4600 -Wa,--trap
 140 cflags-$(CONFIG_CPU_MIPS32_R1)  += $(call cc-option,-march=mips32,-mips32 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
 141                         -Wa,-mips32 -Wa,--trap
 142 cflags-$(CONFIG_CPU_MIPS32_R2)  += $(call cc-option,-march=mips32r2,-mips32r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
 143                         -Wa,-mips32r2 -Wa,--trap
 144 cflags-$(CONFIG_CPU_MIPS32_R6)  += -march=mips32r6 -Wa,--trap
 145 cflags-$(CONFIG_CPU_MIPS64_R1)  += $(call cc-option,-march=mips64,-mips64 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
 146                         -Wa,-mips64 -Wa,--trap
 147 cflags-$(CONFIG_CPU_MIPS64_R2)  += $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
 148                         -Wa,-mips64r2 -Wa,--trap
 149 cflags-$(CONFIG_CPU_MIPS64_R6)  += -march=mips64r6 -Wa,--trap
 150 cflags-$(CONFIG_CPU_R5000)      += -march=r5000 -Wa,--trap
 151 cflags-$(CONFIG_CPU_R5432)      += $(call cc-option,-march=r5400,-march=r5000) \
 152                         -Wa,--trap
 153 cflags-$(CONFIG_CPU_R5500)      += $(call cc-option,-march=r5500,-march=r5000) \
 154                         -Wa,--trap
 155 cflags-$(CONFIG_CPU_NEVADA)     += $(call cc-option,-march=rm5200,-march=r5000) \
 156                         -Wa,--trap
 157 cflags-$(CONFIG_CPU_RM7000)     += $(call cc-option,-march=rm7000,-march=r5000) \
 158                         -Wa,--trap
 159 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-march=sb1,-march=r5000) \
 160                         -Wa,--trap
 161 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-mno-mdmx)
 162 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-mno-mips3d)
 163 cflags-$(CONFIG_CPU_R8000)      += -march=r8000 -Wa,--trap
 164 cflags-$(CONFIG_CPU_R10000)     += $(call cc-option,-march=r10000,-march=r8000) \
 165                         -Wa,--trap
 166 cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += $(call cc-option,-march=octeon) -Wa,--trap
 167 ifeq (,$(findstring march=octeon, $(cflags-$(CONFIG_CPU_CAVIUM_OCTEON))))
 168 cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -Wa,-march=octeon
 169 endif
 170 cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1
 171 cflags-$(CONFIG_CPU_BMIPS)      += -march=mips32 -Wa,-mips32 -Wa,--trap
 172
 173 cflags-$(CONFIG_CPU_R4000_WORKAROUNDS)  += $(call cc-option,-mfix-r4000,)
 174 cflags-$(CONFIG_CPU_R4400_WORKAROUNDS)  += $(call cc-option,-mfix-r4400,)
 175 cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS)  += $(call cc-option,-mno-daddi,)
 176
 177 # For smartmips configurations, there are hundreds of warnings due to ISA overrides
 178 # in assembly and header files. smartmips is only supported for MIPS32r1 onwards
 179 # and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or
 180 # similar directives in the kernel will spam the build logs with the following warnings:
 181 # Warning: the `smartmips' extension requires MIPS32 revision 1 or greater
 182 # or
 183 # Warning: the 64-bit MIPS architecture does not support the `smartmips' extension
 184 # Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has
 185 # been fixed properly.
 186 mips-cflags                             := $(cflags-y)
 187 ifeq ($(CONFIG_CPU_HAS_SMARTMIPS),y)
 188 smartmips-ase                           := $(call cc-option-yn,$(mips-cflags) -msmartmips)
 189 cflags-$(smartmips-ase)                 += -msmartmips -Wa,--no-warn
 190 endif
 191 ifeq ($(CONFIG_CPU_MICROMIPS),y)
 192 micromips-ase                           := $(call cc-option-yn,$(mips-cflags) -mmicromips)
 193 cflags-$(micromips-ase)                 += -mmicromips
 194 endif
 195 ifeq ($(CONFIG_CPU_HAS_MSA),y)
 196 toolchain-msa                           := $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa)
 197 cflags-$(toolchain-msa)                 += -DTOOLCHAIN_SUPPORTS_MSA
 198 endif
 199
 200 cflags-$(CONFIG_MIPS_COMPACT_BRANCHES_NEVER)    += -mcompact-branches=never
 201 cflags-$(CONFIG_MIPS_COMPACT_BRANCHES_OPTIMAL)  += -mcompact-branches=optimal
 202 cflags-$(CONFIG_MIPS_COMPACT_BRANCHES_ALWAYS)   += -mcompact-branches=always
 203
 204 #
 205 # Firmware support
 206 #
 207 libs-$(CONFIG_FW_ARC)           += arch/mips/fw/arc/
 208 libs-$(CONFIG_FW_CFE)           += arch/mips/fw/cfe/
 209 libs-$(CONFIG_FW_SNIPROM)       += arch/mips/fw/sni/
 210 libs-y                          += arch/mips/fw/lib/
 211
 212 #
 213 # Kernel compression
 214 #
 215 ifdef SYS_SUPPORTS_ZBOOT
 216 COMPRESSION_FNAME               = vmlinuz
 217 else
 218 COMPRESSION_FNAME               = vmlinux
 219 endif
 220
 221 #
 222 # Board-dependent options and extra files
 223 #
 224 include arch/mips/Kbuild.platforms
 225
 226 ifdef CONFIG_PHYSICAL_START
 227 load-y                                  = $(CONFIG_PHYSICAL_START)
 228 endif
 229 entry-y                         = 0x$(shell $(NM) vmlinux 2>/dev/null \
 230                                         | grep "\bkernel_entry\b" | cut -f1 -d \ )
 231
 232 cflags-y                        += -I$(srctree)/arch/mips/include/asm/mach-generic
 233 drivers-$(CONFIG_PCI)           += arch/mips/pci/
 234
 235 #
 236 # Automatically detect the build format. By default we choose
 237 # the elf format according to the load address.
 238 # We can always force a build with a 64-bits symbol format by
 239 # passing 'KBUILD_SYM32=no' option to the make's command line.
 240 #
 241 ifdef CONFIG_64BIT
 242   ifndef KBUILD_SYM32
 243     ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0)
 244       KBUILD_SYM32 = y
 245     endif
 246   endif
 247
 248   ifeq ($(KBUILD_SYM32)$(call cc-option-yn,-msym32), yy)
 249     cflags-y += -msym32 -DKBUILD_64BIT_SYM32
 250   else
 251     ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
 252       $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
 253     endif
 254   endif
 255 endif
 256
 257 KBUILD_AFLAGS   += $(cflags-y)
 258 KBUILD_CFLAGS   += $(cflags-y)
 259 KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y)
 260 KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
 261
 262 bootvars-y      = VMLINUX_LOAD_ADDRESS=$(load-y) \
 263                   VMLINUX_ENTRY_ADDRESS=$(entry-y)
 264
 265 LDFLAGS                 += -m $(ld-emul)
 266
 267 ifdef CONFIG_MIPS
 268 CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
 269         egrep -vw '__GNUC_(|MINOR_|PATCHLEVEL_)_' | \
 270         sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
 271 ifdef CONFIG_64BIT
 272 CHECKFLAGS              += -m64
 273 endif
 274 endif
 275
 276 OBJCOPYFLAGS            += --remove-section=.reginfo
 277
 278 head-y := arch/mips/kernel/head.o
 279
 280 libs-y                  += arch/mips/lib/
 281 libs-y                  += arch/mips/math-emu/
 282
 283 # See arch/mips/Kbuild for content of core part of the kernel
 284 core-y += arch/mips/
 285
 286 drivers-$(CONFIG_OPROFILE)      += arch/mips/oprofile/
 287
 288 # suspend and hibernation support
 289 drivers-$(CONFIG_PM)    += arch/mips/power/
 290
 291 # boot image targets (arch/mips/boot/)
 292 boot-y                  := vmlinux.bin
 293 boot-y                  += vmlinux.ecoff
 294 boot-y                  += vmlinux.srec
 295 ifeq ($(shell expr $(load-y) \< 0xffffffff80000000 2> /dev/null), 0)
 296 boot-y                  += uImage
 297 boot-y                  += uImage.bin
 298 boot-y                  += uImage.bz2
 299 boot-y                  += uImage.gz
 300 boot-y                  += uImage.lzma
 301 boot-y                  += uImage.lzo
 302 endif
 303
 304 # compressed boot image targets (arch/mips/boot/compressed/)
 305 bootz-y                 := vmlinuz
 306 bootz-y                 += vmlinuz.bin
 307 bootz-y                 += vmlinuz.ecoff
 308 bootz-y                 += vmlinuz.srec
 309
 310 ifdef CONFIG_LASAT
 311 rom.bin rom.sw: vmlinux
 312         $(Q)$(MAKE) $(build)=arch/mips/lasat/image \
 313                 $(bootvars-y) $@
 314 endif
 315
 316 #
 317 # Some machines like the Indy need 32-bit ELF binaries for booting purposes.
 318 # Other need ECOFF, so we build a 32-bit ELF binary for them which we then
 319 # convert to ECOFF using elf2ecoff.
 320 #
 321 quiet_cmd_32 = OBJCOPY $@
 322         cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
 323 vmlinux.32: vmlinux
 324         $(call cmd,32)
 325
 326 #
 327 # The 64-bit ELF tools are pretty broken so at this time we generate 64-bit
 328 # ELF files from 32-bit files by conversion.
 329 #
 330 quiet_cmd_64 = OBJCOPY $@
 331         cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@
 332 vmlinux.64: vmlinux
 333         $(call cmd,64)
 334
 335 all:    $(all-y)
 336
 337 # boot
 338 $(boot-y): $(vmlinux-32) FORCE
 339         $(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \
 340                 $(bootvars-y) arch/mips/boot/$@
 341
 342 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
 343 # boot/compressed
 344 $(bootz-y): $(vmlinux-32) FORCE
 345         $(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
 346                 $(bootvars-y) 32bit-bfd=$(32bit-bfd) $@
 347 else
 348 vmlinuz: FORCE
 349         @echo '   CONFIG_SYS_SUPPORTS_ZBOOT is not enabled'
 350         /bin/false
 351 endif
 352
 353
 354 CLEAN_FILES += vmlinux.32 vmlinux.64
 355
 356 # device-trees
 357 core-$(CONFIG_BUILTIN_DTB) += arch/mips/boot/dts/
 358
 359 %.dtb %.dtb.S %.dtb.o: | scripts
 360         $(Q)$(MAKE) $(build)=arch/mips/boot/dts arch/mips/boot/dts/$@
 361
 362 PHONY += dtbs
 363 dtbs: scripts
 364         $(Q)$(MAKE) $(build)=arch/mips/boot/dts
 365
 366 PHONY += dtbs_install
 367 dtbs_install:
 368         $(Q)$(MAKE) $(dtbinst)=arch/mips/boot/dts
 369
 370 archprepare:
 371 ifdef CONFIG_MIPS32_N32
 372         @echo '  Checking missing-syscalls for N32'
 373         $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32"
 374 endif
 375 ifdef CONFIG_MIPS32_O32
 376         @echo '  Checking missing-syscalls for O32'
 377         $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32"
 378 endif
 379
 380 install:
 381         $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
 382 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
 383         $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
 384 endif
 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
 388 archclean:
 389         $(Q)$(MAKE) $(clean)=arch/mips/boot
 390         $(Q)$(MAKE) $(clean)=arch/mips/boot/compressed
 391         $(Q)$(MAKE) $(clean)=arch/mips/boot/tools
 392         $(Q)$(MAKE) $(clean)=arch/mips/lasat
 393
 394 define archhelp
 395         echo '  install              - install kernel into $(INSTALL_PATH)'
 396         echo '  vmlinux.ecoff        - ECOFF boot image'
 397         echo '  vmlinux.bin          - Raw binary boot image'
 398         echo '  vmlinux.srec         - SREC boot image'
 399         echo '  vmlinux.32           - 64-bit boot image wrapped in 32bits (IP22/IP32)'
 400         echo '  vmlinuz              - Compressed boot(zboot) image'
 401         echo '  vmlinuz.ecoff        - ECOFF zboot image'
 402         echo '  vmlinuz.bin          - Raw binary zboot image'
 403         echo '  vmlinuz.srec         - SREC zboot image'
 404         echo '  uImage               - U-Boot image'
 405         echo '  uImage.bin           - U-Boot image (uncompressed)'
 406         echo '  uImage.bz2           - U-Boot image (bz2)'
 407         echo '  uImage.gz            - U-Boot image (gzip)'
 408         echo '  uImage.lzma          - U-Boot image (lzma)'
 409         echo '  uImage.lzo           - U-Boot image (lzo)'
 410         echo '  dtbs                 - Device-tree blobs for enabled boards'
 411         echo '  dtbs_install         - Install dtbs to $(INSTALL_DTBS_PATH)'
 412         echo
 413         echo '  These will be default as appropriate for a configured platform.'
 414 endef