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