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 KBUILD_DEFCONFIG := fpga_defconfig
  12
  13 # For ARC FPGA Platforms
  14 platform-$(CONFIG_ARC_PLAT_FPGA_LEGACY) := arcfpga
  15 #New platform adds here
  16
  17 PLATFORM := $(platform-y)
  18 export PLATFORM
  19
  20 cflags-y        += -Iarch/arc/plat-$(PLATFORM)/include
  21 cflags-y        += -mA7 -fno-common -pipe -fno-builtin -D__linux__
  22
  23 atleast_gcc44 :=  $(call cc-ifversion, -gt, 0402, y)
  24 cflags-$(atleast_gcc44)                 += -fsection-anchors
  25
  26 cflags-$(CONFIG_ARC_HAS_LLSC)           += -mlock
  27 cflags-$(CONFIG_ARC_HAS_SWAPE)          += -mswape
  28 cflags-$(CONFIG_ARC_HAS_RTSC)           += -mrtsc
  29 cflags-$(CONFIG_ARC_DW2_UNWIND)         += -fasynchronous-unwind-tables
  30
  31 ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE
  32 # Generic build system uses -O2, we want -O3
  33 cflags-y  += -O3
  34 endif
  35
  36 # small data is default for elf32 tool-chain. If not usable, disable it
  37 # This also allows repurposing GP as scratch reg to gcc reg allocator
  38 disable_small_data := y
  39 cflags-$(disable_small_data)            += -mno-sdata -fcall-used-gp
  40
  41 cflags-$(CONFIG_CPU_BIG_ENDIAN)         += -mbig-endian
  42 ldflags-$(CONFIG_CPU_BIG_ENDIAN)        += -EB
  43
  44 # STAR 9000518362:
  45 # arc-linux-uclibc-ld (buildroot) or arceb-elf32-ld (EZChip) don't accept
  46 # --build-id w/o "-marclinux".
  47 # Default arc-elf32-ld is OK
  48 ldflags-y                               += -marclinux
  49
  50 ARC_LIBGCC                              := -mA7
  51 cflags-$(CONFIG_ARC_HAS_HW_MPY)         += -multcost=16
  52
  53 ifndef CONFIG_ARC_HAS_HW_MPY
  54         cflags-y        += -mno-mpy
  55
  56 # newlib for ARC700 assumes MPY to be always present, which is generally true
  57 # However, if someone really doesn't want MPY, we need to use the 600 ver
  58 # which coupled with -mno-mpy will use mpy emulation
  59 # With gcc 4.4.7, -mno-mpy is enough to make any other related adjustments,
  60 # e.g. increased cost of MPY. With gcc 4.2.1 this had to be explicitly hinted
  61
  62         ARC_LIBGCC              := -marc600
  63         ifneq ($(atleast_gcc44),y)
  64                 cflags-y        += -multcost=30
  65         endif
  66 endif
  67
  68 LIBGCC  := $(shell $(CC) $(ARC_LIBGCC) $(cflags-y) --print-libgcc-file-name)
  69
  70 # Modules with short calls might break for calls into builtin-kernel
  71 KBUILD_CFLAGS_MODULE    += -mlong-calls
  72
  73 # Finally dump eveything into kernel build system
  74 KBUILD_CFLAGS   += $(cflags-y)
  75 KBUILD_AFLAGS   += $(KBUILD_CFLAGS)
  76 LDFLAGS         += $(ldflags-y)
  77
  78 # Needed for Linker script preprocessing
  79 KBUILD_CPPFLAGS += -Iarch/arc/plat-$(PLATFORM)/include
  80
  81 head-y          := arch/arc/kernel/head.o
  82
  83 # See arch/arc/Kbuild for content of core part of the kernel
  84 core-y          += arch/arc/
  85
  86 # w/o this ifneq, make ARCH=arc clean was crapping out
  87 ifneq ($(platform-y),)
  88 core-y          += arch/arc/plat-$(PLATFORM)/
  89 endif
  90
  91 libs-y          += arch/arc/lib/ $(LIBGCC)
  92
  93 #default target for make without any arguements.
  94 KBUILD_IMAGE := bootpImage
  95
  96 all:    $(KBUILD_IMAGE)
  97 boot    := arch/arc/boot
  98
  99 bootpImage: vmlinux
 100
 101 uImage: vmlinux
 102         $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 103
 104 archclean:
 105         $(Q)$(MAKE) $(clean)=$(boot)
 106
 107 # Hacks to enable final link due to absence of link-time branch relexation
 108 # and gcc choosing optimal(shorter) branches at -O3
 109 #
 110 # vineetg Feb 2010: -mlong-calls switched off for overall kernel build
 111 # However lib/decompress_inflate.o (.init.text) calls
 112 # zlib_inflate_workspacesize (.text) causing relocation errors.
 113 # Thus forcing all exten calls in this file to be long calls
 114 export CFLAGS_decompress_inflate.o = -mmedium-calls
 115 export CFLAGS_initramfs.o = -mmedium-calls