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