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 $28 conflicts with
  84 # the current pointer optimization.
  85 #
  86 # The DECStation requires an ECOFF kernel for remote booting, other MIPS
  87 # machines may also.  Since BFD is incredibly buggy with respect to
  88 # crossformat linking we rely on the elf2ecoff tool for format conversion.
  89 #
  90 cflags-y                        += -G 0 -mno-abicalls -fno-pic -pipe
  91 cflags-y                        += -msoft-float
  92 LDFLAGS_vmlinux                 += -G 0 -static -n -nostdlib
  93 KBUILD_AFLAGS_MODULE            += -mlong-calls
  94 KBUILD_CFLAGS_MODULE            += -mlong-calls
  95
  96 cflags-y += -ffreestanding
  97
  98 #
  99 # We explicitly add the endianness specifier if needed, this allows
 100 # to compile kernels with a toolchain for the other endianness. We
 101 # carefully avoid to add it redundantly because gcc 3.3/3.4 complains
 102 # when fed the toolchain default!
 103 #
 104 # Certain gcc versions up to gcc 4.1.1 (probably 4.2-subversion as of
 105 # 2006-10-10 don't properly change the predefined symbols if -EB / -EL
 106 # are used, so we kludge that here.  A bug has been filed at
 107 # http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29413.
 108 #
 109 undef-all += -UMIPSEB -U_MIPSEB -U__MIPSEB -U__MIPSEB__
 110 undef-all += -UMIPSEL -U_MIPSEL -U__MIPSEL -U__MIPSEL__
 111 predef-be += -DMIPSEB -D_MIPSEB -D__MIPSEB -D__MIPSEB__
 112 predef-le += -DMIPSEL -D_MIPSEL -D__MIPSEL -D__MIPSEL__
 113 cflags-$(CONFIG_CPU_BIG_ENDIAN)         += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' && echo -EB $(undef-all) $(predef-be))
 114 cflags-$(CONFIG_CPU_LITTLE_ENDIAN)      += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' || echo -EL $(undef-all) $(predef-le))
 115
 116 # For smartmips configurations, there are hundreds of warnings due to ISA overrides
 117 # in assembly and header files. smartmips is only supported for MIPS32r1 onwards
 118 # and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or
 119 # similar directives in the kernel will spam the build logs with the following warnings:
 120 # Warning: the `smartmips' extension requires MIPS32 revision 1 or greater
 121 # or
 122 # Warning: the 64-bit MIPS architecture does not support the `smartmips' extension
 123 # Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has
 124 # been fixed properly.
 125 cflags-$(CONFIG_CPU_HAS_SMARTMIPS)      += $(call cc-option,-msmartmips) -Wa,--no-warn
 126 cflags-$(CONFIG_CPU_MICROMIPS) += $(call cc-option,-mmicromips)
 127
 128 cflags-$(CONFIG_SB1XXX_CORELIS) += $(call cc-option,-mno-sched-prolog) \
 129                                    -fno-omit-frame-pointer
 130
 131 ifeq ($(CONFIG_CPU_HAS_MSA),y)
 132 toolchain-msa   := $(call cc-option-yn,-mhard-float -mfp64 -Wa$(comma)-mmsa)
 133 cflags-$(toolchain-msa)         += -DTOOLCHAIN_SUPPORTS_MSA
 134 endif
 135
 136 #
 137 # CPU-dependent compiler/assembler options for optimization.
 138 #
 139 cflags-$(CONFIG_CPU_R3000)      += -march=r3000
 140 cflags-$(CONFIG_CPU_TX39XX)     += -march=r3900
 141 cflags-$(CONFIG_CPU_R6000)      += -march=r6000 -Wa,--trap
 142 cflags-$(CONFIG_CPU_R4300)      += -march=r4300 -Wa,--trap
 143 cflags-$(CONFIG_CPU_VR41XX)     += -march=r4100 -Wa,--trap
 144 cflags-$(CONFIG_CPU_R4X00)      += -march=r4600 -Wa,--trap
 145 cflags-$(CONFIG_CPU_TX49XX)     += -march=r4600 -Wa,--trap
 146 cflags-$(CONFIG_CPU_MIPS32_R1)  += $(call cc-option,-march=mips32,-mips32 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
 147                         -Wa,-mips32 -Wa,--trap
 148 cflags-$(CONFIG_CPU_MIPS32_R2)  += $(call cc-option,-march=mips32r2,-mips32r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
 149                         -Wa,-mips32r2 -Wa,--trap
 150 cflags-$(CONFIG_CPU_MIPS64_R1)  += $(call cc-option,-march=mips64,-mips64 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
 151                         -Wa,-mips64 -Wa,--trap
 152 cflags-$(CONFIG_CPU_MIPS64_R2)  += $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
 153                         -Wa,-mips64r2 -Wa,--trap
 154 cflags-$(CONFIG_CPU_R5000)      += -march=r5000 -Wa,--trap
 155 cflags-$(CONFIG_CPU_R5432)      += $(call cc-option,-march=r5400,-march=r5000) \
 156                         -Wa,--trap
 157 cflags-$(CONFIG_CPU_R5500)      += $(call cc-option,-march=r5500,-march=r5000) \
 158                         -Wa,--trap
 159 cflags-$(CONFIG_CPU_NEVADA)     += $(call cc-option,-march=rm5200,-march=r5000) \
 160                         -Wa,--trap
 161 cflags-$(CONFIG_CPU_RM7000)     += $(call cc-option,-march=rm7000,-march=r5000) \
 162                         -Wa,--trap
 163 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-march=sb1,-march=r5000) \
 164                         -Wa,--trap
 165 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-mno-mdmx)
 166 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-mno-mips3d)
 167 cflags-$(CONFIG_CPU_R8000)      += -march=r8000 -Wa,--trap
 168 cflags-$(CONFIG_CPU_R10000)     += $(call cc-option,-march=r10000,-march=r8000) \
 169                         -Wa,--trap
 170 cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += $(call cc-option,-march=octeon) -Wa,--trap
 171 ifeq (,$(findstring march=octeon, $(cflags-$(CONFIG_CPU_CAVIUM_OCTEON))))
 172 cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -Wa,-march=octeon
 173 endif
 174 cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1
 175 cflags-$(CONFIG_CPU_BMIPS)      += -march=mips32 -Wa,-mips32 -Wa,--trap
 176
 177 cflags-$(CONFIG_CPU_R4000_WORKAROUNDS)  += $(call cc-option,-mfix-r4000,)
 178 cflags-$(CONFIG_CPU_R4400_WORKAROUNDS)  += $(call cc-option,-mfix-r4400,)
 179 cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS)  += $(call cc-option,-mno-daddi,)
 180
 181 ifdef CONFIG_CPU_SB1
 182 ifdef CONFIG_SB1_PASS_1_WORKAROUNDS
 183 KBUILD_AFLAGS_MODULE += -msb1-pass1-workarounds
 184 KBUILD_CFLAGS_MODULE += -msb1-pass1-workarounds
 185 endif
 186 endif
 187
 188 #
 189 # Firmware support
 190 #
 191 libs-$(CONFIG_FW_ARC)           += arch/mips/fw/arc/
 192 libs-$(CONFIG_FW_CFE)           += arch/mips/fw/cfe/
 193 libs-$(CONFIG_FW_SNIPROM)       += arch/mips/fw/sni/
 194 libs-y                          += arch/mips/fw/lib/
 195
 196 #
 197 # Kernel compression
 198 #
 199 ifdef SYS_SUPPORTS_ZBOOT
 200 COMPRESSION_FNAME               = vmlinuz
 201 else
 202 COMPRESSION_FNAME               = vmlinux
 203 endif
 204
 205 #
 206 # Board-dependent options and extra files
 207 #
 208 include $(srctree)/arch/mips/Kbuild.platforms
 209
 210 ifdef CONFIG_PHYSICAL_START
 211 load-y                                  = $(CONFIG_PHYSICAL_START)
 212 endif
 213 entry-y                         = 0x$(shell $(NM) vmlinux 2>/dev/null \
 214                                         | grep "\bkernel_entry\b" | cut -f1 -d \ )
 215
 216 cflags-y                        += -I$(srctree)/arch/mips/include/asm/mach-generic
 217 drivers-$(CONFIG_PCI)           += arch/mips/pci/
 218
 219 #
 220 # Automatically detect the build format. By default we choose
 221 # the elf format according to the load address.
 222 # We can always force a build with a 64-bits symbol format by
 223 # passing 'KBUILD_SYM32=no' option to the make's command line.
 224 #
 225 ifdef CONFIG_64BIT
 226   ifndef KBUILD_SYM32
 227     ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0)
 228       KBUILD_SYM32 = y
 229     endif
 230   endif
 231
 232   ifeq ($(KBUILD_SYM32)$(call cc-option-yn,-msym32), yy)
 233     cflags-y += -msym32 -DKBUILD_64BIT_SYM32
 234   else
 235     ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
 236       $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
 237     endif
 238   endif
 239 endif
 240
 241 KBUILD_AFLAGS   += $(cflags-y)
 242 KBUILD_CFLAGS   += $(cflags-y)
 243 KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y)
 244 KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
 245
 246 bootvars-y      = VMLINUX_LOAD_ADDRESS=$(load-y) \
 247                   VMLINUX_ENTRY_ADDRESS=$(entry-y)
 248
 249 LDFLAGS                 += -m $(ld-emul)
 250
 251 ifdef CONFIG_MIPS
 252 CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
 253         egrep -vw '__GNUC_(|MINOR_|PATCHLEVEL_)_' | \
 254         sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/")
 255 ifdef CONFIG_64BIT
 256 CHECKFLAGS              += -m64
 257 endif
 258 endif
 259
 260 OBJCOPYFLAGS            += --remove-section=.reginfo
 261
 262 head-y := arch/mips/kernel/head.o
 263
 264 libs-y                  += arch/mips/lib/
 265 libs-y                  += arch/mips/math-emu/
 266
 267 # See arch/mips/Kbuild for content of core part of the kernel
 268 core-y += arch/mips/
 269
 270 drivers-$(CONFIG_OPROFILE)      += arch/mips/oprofile/
 271
 272 # suspend and hibernation support
 273 drivers-$(CONFIG_PM)    += arch/mips/power/
 274
 275 # boot image targets (arch/mips/boot/)
 276 boot-y                  := vmlinux.bin
 277 boot-y                  += vmlinux.ecoff
 278 boot-y                  += vmlinux.srec
 279 ifeq ($(shell expr $(load-y) \< 0xffffffff80000000 2> /dev/null), 0)
 280 boot-y                  += uImage
 281 boot-y                  += uImage.gz
 282 endif
 283
 284 # compressed boot image targets (arch/mips/boot/compressed/)
 285 bootz-y                 := vmlinuz
 286 bootz-y                 += vmlinuz.bin
 287 bootz-y                 += vmlinuz.ecoff
 288 bootz-y                 += vmlinuz.srec
 289
 290 ifdef CONFIG_LASAT
 291 rom.bin rom.sw: vmlinux
 292         $(Q)$(MAKE) $(build)=arch/mips/lasat/image \
 293                 $(bootvars-y) $@
 294 endif
 295
 296 #
 297 # Some machines like the Indy need 32-bit ELF binaries for booting purposes.
 298 # Other need ECOFF, so we build a 32-bit ELF binary for them which we then
 299 # convert to ECOFF using elf2ecoff.
 300 #
 301 quiet_cmd_32 = OBJCOPY $@
 302         cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
 303 vmlinux.32: vmlinux
 304         $(call cmd,32)
 305
 306 #
 307 # The 64-bit ELF tools are pretty broken so at this time we generate 64-bit
 308 # ELF files from 32-bit files by conversion.
 309 #
 310 quiet_cmd_64 = OBJCOPY $@
 311         cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@
 312 vmlinux.64: vmlinux
 313         $(call cmd,64)
 314
 315 all:    $(all-y)
 316
 317 # boot
 318 $(boot-y): $(vmlinux-32) FORCE
 319         $(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \
 320                 $(bootvars-y) arch/mips/boot/$@
 321
 322 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
 323 # boot/compressed
 324 $(bootz-y): $(vmlinux-32) FORCE
 325         $(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
 326                 $(bootvars-y) 32bit-bfd=$(32bit-bfd) $@
 327 else
 328 vmlinuz: FORCE
 329         @echo '   CONFIG_SYS_SUPPORTS_ZBOOT is not enabled'
 330         /bin/false
 331 endif
 332
 333
 334 CLEAN_FILES += vmlinux.32 vmlinux.64
 335
 336 archprepare:
 337 ifdef CONFIG_MIPS32_N32
 338         @echo '  Checking missing-syscalls for N32'
 339         $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32"
 340 endif
 341 ifdef CONFIG_MIPS32_O32
 342         @echo '  Checking missing-syscalls for O32'
 343         $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32"
 344 endif
 345
 346 install:
 347         $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
 348 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
 349         $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
 350 endif
 351         $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
 352         $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
 353
 354 archclean:
 355         $(Q)$(MAKE) $(clean)=arch/mips/boot
 356         $(Q)$(MAKE) $(clean)=arch/mips/boot/compressed
 357         $(Q)$(MAKE) $(clean)=arch/mips/lasat
 358
 359 define archhelp
 360         echo '  install              - install kernel into $(INSTALL_PATH)'
 361         echo '  vmlinux.ecoff        - ECOFF boot image'
 362         echo '  vmlinux.bin          - Raw binary boot image'
 363         echo '  vmlinux.srec         - SREC boot image'
 364         echo '  vmlinuz              - Compressed boot(zboot) image'
 365         echo '  vmlinuz.ecoff        - ECOFF zboot image'
 366         echo '  vmlinuz.bin          - Raw binary zboot image'
 367         echo '  vmlinuz.srec         - SREC zboot image'
 368         echo '  uImage               - U-Boot image'
 369         echo '  uImage.gz            - U-Boot image (gzip)'
 370         echo
 371         echo '  These will be default as appropriate for a configured platform.'
 372 endef