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) $(predef-le))
 124
 125 # For smartmips configurations, there are hundreds of warnings due to ISA overrides
 126 # in assembly and header files. smartmips is only supported for MIPS32r1 onwards
 127 # and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or
 128 # similar directives in the kernel will spam the build logs with the following warnings:
 129 # Warning: the `smartmips' extension requires MIPS32 revision 1 or greater
 130 # or
 131 # Warning: the 64-bit MIPS architecture does not support the `smartmips' extension
 132 # Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has
 133 # been fixed properly.
 134 cflags-$(CONFIG_CPU_HAS_SMARTMIPS)      += $(call cc-option,-msmartmips) -Wa,--no-warn
 135 cflags-$(CONFIG_CPU_MICROMIPS) += $(call cc-option,-mmicromips)
 136
 137 cflags-$(CONFIG_SB1XXX_CORELIS) += $(call cc-option,-mno-sched-prolog) \
 138                                    -fno-omit-frame-pointer
 139
 140 ifeq ($(CONFIG_CPU_HAS_MSA),y)
 141 toolchain-msa   := $(call cc-option-yn,-mhard-float -mfp64 -Wa$(comma)-mmsa)
 142 cflags-$(toolchain-msa)         += -DTOOLCHAIN_SUPPORTS_MSA
 143 endif
 144
 145 #
 146 # CPU-dependent compiler/assembler options for optimization.
 147 #
 148 cflags-$(CONFIG_CPU_R3000)      += -march=r3000
 149 cflags-$(CONFIG_CPU_TX39XX)     += -march=r3900
 150 cflags-$(CONFIG_CPU_R6000)      += -march=r6000 -Wa,--trap
 151 cflags-$(CONFIG_CPU_R4300)      += -march=r4300 -Wa,--trap
 152 cflags-$(CONFIG_CPU_VR41XX)     += -march=r4100 -Wa,--trap
 153 cflags-$(CONFIG_CPU_R4X00)      += -march=r4600 -Wa,--trap
 154 cflags-$(CONFIG_CPU_TX49XX)     += -march=r4600 -Wa,--trap
 155 cflags-$(CONFIG_CPU_MIPS32_R1)  += $(call cc-option,-march=mips32,-mips32 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
 156                         -Wa,-mips32 -Wa,--trap
 157 cflags-$(CONFIG_CPU_MIPS32_R2)  += $(call cc-option,-march=mips32r2,-mips32r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
 158                         -Wa,-mips32r2 -Wa,--trap
 159 cflags-$(CONFIG_CPU_MIPS64_R1)  += $(call cc-option,-march=mips64,-mips64 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
 160                         -Wa,-mips64 -Wa,--trap
 161 cflags-$(CONFIG_CPU_MIPS64_R2)  += $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
 162                         -Wa,-mips64r2 -Wa,--trap
 163 cflags-$(CONFIG_CPU_R5000)      += -march=r5000 -Wa,--trap
 164 cflags-$(CONFIG_CPU_R5432)      += $(call cc-option,-march=r5400,-march=r5000) \
 165                         -Wa,--trap
 166 cflags-$(CONFIG_CPU_R5500)      += $(call cc-option,-march=r5500,-march=r5000) \
 167                         -Wa,--trap
 168 cflags-$(CONFIG_CPU_NEVADA)     += $(call cc-option,-march=rm5200,-march=r5000) \
 169                         -Wa,--trap
 170 cflags-$(CONFIG_CPU_RM7000)     += $(call cc-option,-march=rm7000,-march=r5000) \
 171                         -Wa,--trap
 172 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-march=sb1,-march=r5000) \
 173                         -Wa,--trap
 174 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-mno-mdmx)
 175 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-mno-mips3d)
 176 cflags-$(CONFIG_CPU_R8000)      += -march=r8000 -Wa,--trap
 177 cflags-$(CONFIG_CPU_R10000)     += $(call cc-option,-march=r10000,-march=r8000) \
 178                         -Wa,--trap
 179 cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += $(call cc-option,-march=octeon) -Wa,--trap
 180 ifeq (,$(findstring march=octeon, $(cflags-$(CONFIG_CPU_CAVIUM_OCTEON))))
 181 cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -Wa,-march=octeon
 182 endif
 183 cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1
 184 cflags-$(CONFIG_CPU_BMIPS)      += -march=mips32 -Wa,-mips32 -Wa,--trap
 185
 186 cflags-$(CONFIG_CPU_R4000_WORKAROUNDS)  += $(call cc-option,-mfix-r4000,)
 187 cflags-$(CONFIG_CPU_R4400_WORKAROUNDS)  += $(call cc-option,-mfix-r4400,)
 188 cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS)  += $(call cc-option,-mno-daddi,)
 189
 190 ifdef CONFIG_CPU_SB1
 191 ifdef CONFIG_SB1_PASS_1_WORKAROUNDS
 192 KBUILD_AFLAGS_MODULE += -msb1-pass1-workarounds
 193 KBUILD_CFLAGS_MODULE += -msb1-pass1-workarounds
 194 endif
 195 endif
 196
 197 #
 198 # Firmware support
 199 #
 200 libs-$(CONFIG_FW_ARC)           += arch/mips/fw/arc/
 201 libs-$(CONFIG_FW_CFE)           += arch/mips/fw/cfe/
 202 libs-$(CONFIG_FW_SNIPROM)       += arch/mips/fw/sni/
 203 libs-y                          += arch/mips/fw/lib/
 204
 205 #
 206 # Kernel compression
 207 #
 208 ifdef SYS_SUPPORTS_ZBOOT
 209 COMPRESSION_FNAME               = vmlinuz
 210 else
 211 COMPRESSION_FNAME               = vmlinux
 212 endif
 213
 214 #
 215 # Board-dependent options and extra files
 216 #
 217 include $(srctree)/arch/mips/Kbuild.platforms
 218
 219 ifdef CONFIG_PHYSICAL_START
 220 load-y                                  = $(CONFIG_PHYSICAL_START)
 221 endif
 222 entry-y                         = 0x$(shell $(NM) vmlinux 2>/dev/null \
 223                                         | grep "\bkernel_entry\b" | cut -f1 -d \ )
 224
 225 cflags-y                        += -I$(srctree)/arch/mips/include/asm/mach-generic
 226 drivers-$(CONFIG_PCI)           += arch/mips/pci/
 227
 228 #
 229 # Automatically detect the build format. By default we choose
 230 # the elf format according to the load address.
 231 # We can always force a build with a 64-bits symbol format by
 232 # passing 'KBUILD_SYM32=no' option to the make's command line.
 233 #
 234 ifdef CONFIG_64BIT
 235   ifndef KBUILD_SYM32
 236     ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0)
 237       KBUILD_SYM32 = y
 238     endif
 239   endif
 240
 241   ifeq ($(KBUILD_SYM32)$(call cc-option-yn,-msym32), yy)
 242     cflags-y += -msym32 -DKBUILD_64BIT_SYM32
 243   else
 244     ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
 245       $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
 246     endif
 247   endif
 248 endif
 249
 250 KBUILD_AFLAGS   += $(cflags-y)
 251 KBUILD_CFLAGS   += $(cflags-y)
 252 KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y)
 253 KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
 254
 255 bootvars-y      = VMLINUX_LOAD_ADDRESS=$(load-y) \
 256                   VMLINUX_ENTRY_ADDRESS=$(entry-y)
 257
 258 LDFLAGS                 += -m $(ld-emul)
 259
 260 ifdef CONFIG_MIPS
 261 CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
 262         egrep -vw '__GNUC_(|MINOR_|PATCHLEVEL_)_' | \
 263         sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/")
 264 ifdef CONFIG_64BIT
 265 CHECKFLAGS              += -m64
 266 endif
 267 endif
 268
 269 OBJCOPYFLAGS            += --remove-section=.reginfo
 270
 271 head-y := arch/mips/kernel/head.o
 272
 273 libs-y                  += arch/mips/lib/
 274 libs-y                  += arch/mips/math-emu/
 275
 276 # See arch/mips/Kbuild for content of core part of the kernel
 277 core-y += arch/mips/
 278
 279 drivers-$(CONFIG_OPROFILE)      += arch/mips/oprofile/
 280
 281 # suspend and hibernation support
 282 drivers-$(CONFIG_PM)    += arch/mips/power/
 283
 284 # boot image targets (arch/mips/boot/)
 285 boot-y                  := vmlinux.bin
 286 boot-y                  += vmlinux.ecoff
 287 boot-y                  += vmlinux.srec
 288 ifeq ($(shell expr $(load-y) \< 0xffffffff80000000 2> /dev/null), 0)
 289 boot-y                  += uImage
 290 boot-y                  += uImage.gz
 291 endif
 292
 293 # compressed boot image targets (arch/mips/boot/compressed/)
 294 bootz-y                 := vmlinuz
 295 bootz-y                 += vmlinuz.bin
 296 bootz-y                 += vmlinuz.ecoff
 297 bootz-y                 += vmlinuz.srec
 298
 299 ifdef CONFIG_LASAT
 300 rom.bin rom.sw: vmlinux
 301         $(Q)$(MAKE) $(build)=arch/mips/lasat/image \
 302                 $(bootvars-y) $@
 303 endif
 304
 305 #
 306 # Some machines like the Indy need 32-bit ELF binaries for booting purposes.
 307 # Other need ECOFF, so we build a 32-bit ELF binary for them which we then
 308 # convert to ECOFF using elf2ecoff.
 309 #
 310 quiet_cmd_32 = OBJCOPY $@
 311         cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
 312 vmlinux.32: vmlinux
 313         $(call cmd,32)
 314
 315 #
 316 # The 64-bit ELF tools are pretty broken so at this time we generate 64-bit
 317 # ELF files from 32-bit files by conversion.
 318 #
 319 quiet_cmd_64 = OBJCOPY $@
 320         cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@
 321 vmlinux.64: vmlinux
 322         $(call cmd,64)
 323
 324 all:    $(all-y)
 325
 326 # boot
 327 $(boot-y): $(vmlinux-32) FORCE
 328         $(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \
 329                 $(bootvars-y) arch/mips/boot/$@
 330
 331 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
 332 # boot/compressed
 333 $(bootz-y): $(vmlinux-32) FORCE
 334         $(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
 335                 $(bootvars-y) 32bit-bfd=$(32bit-bfd) $@
 336 else
 337 vmlinuz: FORCE
 338         @echo '   CONFIG_SYS_SUPPORTS_ZBOOT is not enabled'
 339         /bin/false
 340 endif
 341
 342
 343 CLEAN_FILES += vmlinux.32 vmlinux.64
 344
 345 # device-trees
 346 core-$(CONFIG_BUILTIN_DTB) += arch/mips/boot/dts/
 347
 348 %.dtb %.dtb.S %.dtb.o: | scripts
 349         $(Q)$(MAKE) $(build)=arch/mips/boot/dts arch/mips/boot/dts/$@
 350
 351 PHONY += dtbs
 352 dtbs: scripts
 353         $(Q)$(MAKE) $(build)=arch/mips/boot/dts dtbs
 354
 355 archprepare:
 356 ifdef CONFIG_MIPS32_N32
 357         @echo '  Checking missing-syscalls for N32'
 358         $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32"
 359 endif
 360 ifdef CONFIG_MIPS32_O32
 361         @echo '  Checking missing-syscalls for O32'
 362         $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32"
 363 endif
 364
 365 install:
 366         $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
 367 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
 368         $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
 369 endif
 370         $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
 371         $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
 372
 373 archclean:
 374         $(Q)$(MAKE) $(clean)=arch/mips/boot
 375         $(Q)$(MAKE) $(clean)=arch/mips/boot/compressed
 376         $(Q)$(MAKE) $(clean)=arch/mips/lasat
 377
 378 define archhelp
 379         echo '  install              - install kernel into $(INSTALL_PATH)'
 380         echo '  vmlinux.ecoff        - ECOFF boot image'
 381         echo '  vmlinux.bin          - Raw binary boot image'
 382         echo '  vmlinux.srec         - SREC boot image'
 383         echo '  vmlinux.32           - 64-bit boot image wrapped in 32bits (IP22/IP32)'
 384         echo '  vmlinuz              - Compressed boot(zboot) image'
 385         echo '  vmlinuz.ecoff        - ECOFF zboot image'
 386         echo '  vmlinuz.bin          - Raw binary zboot image'
 387         echo '  vmlinuz.srec         - SREC zboot image'
 388         echo '  uImage               - U-Boot image'
 389         echo '  uImage.gz            - U-Boot image (gzip)'
 390         echo '  dtbs                 - Device-tree blobs for enabled boards'
 391         echo
 392         echo '  These will be default as appropriate for a configured platform.'
 393 endef