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 :=  $(call cc-ifversion, -ge, 0404, y)
  50
  51 cflags-$(atleast_gcc44)                 += -fsection-anchors
  52
  53 cflags-$(CONFIG_ARC_HAS_LLSC)           += -mlock
  54 cflags-$(CONFIG_ARC_HAS_SWAPE)          += -mswape
  55
  56 ifdef CONFIG_ISA_ARCV2
  57
  58 ifndef CONFIG_ARC_HAS_LL64
  59 cflags-y                                += -mno-ll64
  60 endif
  61
  62 ifndef CONFIG_ARC_HAS_DIV_REM
  63 cflags-y                                += -mno-div-rem
  64 endif
  65
  66 endif
  67
  68 cfi := $(call as-instr,.cfi_startproc\n.cfi_endproc,-DARC_DW2_UNWIND_AS_CFI)
  69 cflags-$(CONFIG_ARC_DW2_UNWIND)         += -fasynchronous-unwind-tables $(cfi)
  70
  71 ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE
  72 # Generic build system uses -O2, we want -O3
  73 # Note: No need to add to cflags-y as that happens anyways
  74 #
  75 # Disable the false maybe-uninitialized warings gcc spits out at -O3
  76 ARCH_CFLAGS += -O3 $(call cc-disable-warning,maybe-uninitialized,)
  77 endif
  78
  79 # small data is default for elf32 tool-chain. If not usable, disable it
  80 # This also allows repurposing GP as scratch reg to gcc reg allocator
  81 disable_small_data := y
  82 cflags-$(disable_small_data)            += -mno-sdata -fcall-used-gp
  83
  84 cflags-$(CONFIG_CPU_BIG_ENDIAN)         += -mbig-endian
  85 ldflags-$(CONFIG_CPU_BIG_ENDIAN)        += -EB
  86
  87 # STAR 9000518362: (fixed with binutils shipping with gcc 4.8)
  88 # arc-linux-uclibc-ld (buildroot) or arceb-elf32-ld (EZChip) don't accept
  89 # --build-id w/o "-marclinux". Default arc-elf32-ld is OK
  90 ldflags-$(upto_gcc44)                   += -marclinux
  91
  92 LIBGCC  := $(shell $(CC) $(cflags-y) --print-libgcc-file-name)
  93
  94 # Modules with short calls might break for calls into builtin-kernel
  95 KBUILD_CFLAGS_MODULE    += -mlong-calls -mno-millicode
  96
  97 # Finally dump eveything into kernel build system
  98 KBUILD_CFLAGS   += $(cflags-y)
  99 KBUILD_AFLAGS   += $(KBUILD_CFLAGS)
 100 LDFLAGS         += $(ldflags-y)
 101
 102 head-y          := arch/arc/kernel/head.o
 103
 104 # See arch/arc/Kbuild for content of core part of the kernel
 105 core-y          += arch/arc/
 106
 107 # w/o this dtb won't embed into kernel binary
 108 core-y          += arch/arc/boot/dts/
 109
 110 core-y                          += arch/arc/plat-sim/
 111 core-$(CONFIG_ARC_PLAT_TB10X)   += arch/arc/plat-tb10x/
 112 core-$(CONFIG_ARC_PLAT_AXS10X)  += arch/arc/plat-axs10x/
 113 core-$(CONFIG_ARC_PLAT_EZNPS)   += arch/arc/plat-eznps/
 114
 115 ifdef CONFIG_ARC_PLAT_EZNPS
 116 KBUILD_CPPFLAGS += -I$(srctree)/arch/arc/plat-eznps/include
 117 endif
 118
 119 drivers-$(CONFIG_OPROFILE)      += arch/arc/oprofile/
 120
 121 libs-y          += arch/arc/lib/ $(LIBGCC)
 122
 123 boot            := arch/arc/boot
 124
 125 #default target for make without any arguments.
 126 KBUILD_IMAGE    := $(boot)/bootpImage
 127
 128 all:    bootpImage
 129 bootpImage: vmlinux
 130
 131 boot_targets += uImage uImage.bin uImage.gz
 132
 133 $(boot_targets): vmlinux
 134         $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 135
 136 %.dtb %.dtb.S %.dtb.o: scripts
 137         $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@
 138
 139 dtbs: scripts
 140         $(Q)$(MAKE) $(build)=$(boot)/dts
 141
 142 archclean:
 143         $(Q)$(MAKE) $(clean)=$(boot)
 144
 145 # Hacks to enable final link due to absence of link-time branch relexation
 146 # and gcc choosing optimal(shorter) branches at -O3
 147 #
 148 # vineetg Feb 2010: -mlong-calls switched off for overall kernel build
 149 # However lib/decompress_inflate.o (.init.text) calls
 150 # zlib_inflate_workspacesize (.text) causing relocation errors.
 151 # Thus forcing all exten calls in this file to be long calls
 152 export CFLAGS_decompress_inflate.o = -mmedium-calls
 153 export CFLAGS_initramfs.o = -mmedium-calls
 154 ifdef CONFIG_SMP
 155 export CFLAGS_core.o = -mmedium-calls
 156 endif