arch/arc/Makefile

   1 #
   2 # Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
   3 #
   4 # This program is free software; you can redistribute it and/or modify
   5 # it under the terms of the GNU General Public License version 2 as
   6 # published by the Free Software Foundation.
   7 #
   8
   9 UTS_MACHINE := arc
  10
  11 ifeq ($(CROSS_COMPILE),)
  12 ifndef CONFIG_CPU_BIG_ENDIAN
  13 CROSS_COMPILE := arc-linux-
  14 else
  15 CROSS_COMPILE := arceb-linux-
  16 endif
  17 endif
  18
  19 KBUILD_DEFCONFIG := nsim_700_defconfig
  20
  21 cflags-y        += -fno-common -pipe -fno-builtin -D__linux__
  22 cflags-$(CONFIG_ISA_ARCOMPACT)  += -mA7
  23 cflags-$(CONFIG_ISA_ARCV2)      += -mcpu=archs
  24
  25 is_700 = $(shell $(CC) -dM -E - < /dev/null | grep -q "ARC700" && echo 1 || echo 0)
  26
  27 ifdef CONFIG_ISA_ARCOMPACT
  28 ifeq ($(is_700), 0)
  29     $(error Toolchain not configured for ARCompact builds)
  30 endif
  31 endif
  32
  33 ifdef CONFIG_ISA_ARCV2
  34 ifeq ($(is_700), 1)
  35     $(error Toolchain not configured for ARCv2 builds)
  36 endif
  37 endif
  38
  39 ifdef CONFIG_ARC_CURR_IN_REG
  40 # For a global register defintion, make sure it gets passed to every file
  41 # We had a customer reported bug where some code built in kernel was NOT using
  42 # any kernel headers, and missing the r25 global register
  43 # Can't do unconditionally because of recursive include issues
  44 # due to <linux/thread_info.h>
  45 LINUXINCLUDE    +=  -include ${src}/arch/arc/include/asm/current.h
  46 endif
  47
  48 upto_gcc44    :=  $(call cc-ifversion, -le, 0404, y)
  49 atleast_gcc44 :=  $(call cc-ifversion, -ge, 0404, y)
  50 atleast_gcc48 :=  $(call cc-ifversion, -ge, 0408, y)
  51
  52 cflags-$(atleast_gcc44)                 += -fsection-anchors
  53
  54 cflags-$(CONFIG_ARC_HAS_LLSC)           += -mlock
  55 cflags-$(CONFIG_ARC_HAS_SWAPE)          += -mswape
  56
  57 ifdef CONFIG_ISA_ARCV2
  58
  59 ifndef CONFIG_ARC_HAS_LL64
  60 cflags-y                                += -mno-ll64
  61 endif
  62
  63 ifndef CONFIG_ARC_HAS_DIV_REM
  64 cflags-y                                += -mno-div-rem
  65 endif
  66
  67 endif
  68
  69 cflags-$(CONFIG_ARC_DW2_UNWIND)         += -fasynchronous-unwind-tables
  70
  71 # By default gcc 4.8 generates dwarf4 which kernel unwinder can't grok
  72 ifeq ($(atleast_gcc48),y)
  73 cflags-$(CONFIG_ARC_DW2_UNWIND)         += -gdwarf-2
  74 endif
  75
  76 ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE
  77 # Generic build system uses -O2, we want -O3
  78 # Note: No need to add to cflags-y as that happens anyways
  79 #
  80 # Disable the false maybe-uninitialized warings gcc spits out at -O3
  81 ARCH_CFLAGS += -O3 $(call cc-disable-warning,maybe-uninitialized,)
  82 endif
  83
  84 # small data is default for elf32 tool-chain. If not usable, disable it
  85 # This also allows repurposing GP as scratch reg to gcc reg allocator
  86 disable_small_data := y
  87 cflags-$(disable_small_data)            += -mno-sdata -fcall-used-gp
  88
  89 cflags-$(CONFIG_CPU_BIG_ENDIAN)         += -mbig-endian
  90 ldflags-$(CONFIG_CPU_BIG_ENDIAN)        += -EB
  91
  92 # STAR 9000518362: (fixed with binutils shipping with gcc 4.8)
  93 # arc-linux-uclibc-ld (buildroot) or arceb-elf32-ld (EZChip) don't accept
  94 # --build-id w/o "-marclinux". Default arc-elf32-ld is OK
  95 ldflags-$(upto_gcc44)                   += -marclinux
  96
  97 LIBGCC  := $(shell $(CC) $(cflags-y) --print-libgcc-file-name)
  98
  99 # Modules with short calls might break for calls into builtin-kernel
 100 KBUILD_CFLAGS_MODULE    += -mlong-calls -mno-millicode
 101
 102 # Finally dump eveything into kernel build system
 103 KBUILD_CFLAGS   += $(cflags-y)
 104 KBUILD_AFLAGS   += $(KBUILD_CFLAGS)
 105 LDFLAGS         += $(ldflags-y)
 106
 107 head-y          := arch/arc/kernel/head.o
 108
 109 # See arch/arc/Kbuild for content of core part of the kernel
 110 core-y          += arch/arc/
 111
 112 # w/o this dtb won't embed into kernel binary
 113 core-y          += arch/arc/boot/dts/
 114
 115 core-$(CONFIG_ARC_PLAT_SIM)     += arch/arc/plat-sim/
 116 core-$(CONFIG_ARC_PLAT_TB10X)   += arch/arc/plat-tb10x/
 117 core-$(CONFIG_ARC_PLAT_AXS10X)  += arch/arc/plat-axs10x/
 118 core-$(CONFIG_ARC_PLAT_EZNPS)   += arch/arc/plat-eznps/
 119
 120 ifdef CONFIG_ARC_PLAT_EZNPS
 121 KBUILD_CPPFLAGS += -I$(srctree)/arch/arc/plat-eznps/include
 122 endif
 123
 124 drivers-$(CONFIG_OPROFILE)      += arch/arc/oprofile/
 125
 126 libs-y          += arch/arc/lib/ $(LIBGCC)
 127
 128 boot            := arch/arc/boot
 129
 130 #default target for make without any arguements.
 131 KBUILD_IMAGE    := bootpImage
 132
 133 all:    $(KBUILD_IMAGE)
 134 bootpImage: vmlinux
 135
 136 boot_targets += uImage uImage.bin uImage.gz
 137
 138 $(boot_targets): vmlinux
 139         $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 140
 141 %.dtb %.dtb.S %.dtb.o: scripts
 142         $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@
 143
 144 dtbs: scripts
 145         $(Q)$(MAKE) $(build)=$(boot)/dts
 146
 147 archclean:
 148         $(Q)$(MAKE) $(clean)=$(boot)
 149
 150 # Hacks to enable final link due to absence of link-time branch relexation
 151 # and gcc choosing optimal(shorter) branches at -O3
 152 #
 153 # vineetg Feb 2010: -mlong-calls switched off for overall kernel build
 154 # However lib/decompress_inflate.o (.init.text) calls
 155 # zlib_inflate_workspacesize (.text) causing relocation errors.
 156 # Thus forcing all exten calls in this file to be long calls
 157 export CFLAGS_decompress_inflate.o = -mmedium-calls
 158 export CFLAGS_initramfs.o = -mmedium-calls
 159 ifdef CONFIG_SMP
 160 export CFLAGS_core.o = -mmedium-calls
 161 endif