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 ifeq ($(CROSS_COMPILE),)
  10 ifndef CONFIG_CPU_BIG_ENDIAN
  11 CROSS_COMPILE := arc-linux-
  12 else
  13 CROSS_COMPILE := arceb-linux-
  14 endif
  15 endif
  16
  17 KBUILD_DEFCONFIG := nsim_700_defconfig
  18
  19 cflags-y        += -fno-common -pipe -fno-builtin -D__linux__
  20 cflags-$(CONFIG_ISA_ARCOMPACT)  += -mA7
  21 cflags-$(CONFIG_ISA_ARCV2)      += -mcpu=archs
  22
  23 is_700 = $(shell $(CC) -dM -E - < /dev/null | grep -q "ARC700" && echo 1 || echo 0)
  24
  25 ifdef CONFIG_ISA_ARCOMPACT
  26 ifeq ($(is_700), 0)
  27     $(error Toolchain not configured for ARCompact builds)
  28 endif
  29 endif
  30
  31 ifdef CONFIG_ISA_ARCV2
  32 ifeq ($(is_700), 1)
  33     $(error Toolchain not configured for ARCv2 builds)
  34 endif
  35 endif
  36
  37 ifdef CONFIG_ARC_CURR_IN_REG
  38 # For a global register defintion, make sure it gets passed to every file
  39 # We had a customer reported bug where some code built in kernel was NOT using
  40 # any kernel headers, and missing the r25 global register
  41 # Can't do unconditionally because of recursive include issues
  42 # due to <linux/thread_info.h>
  43 LINUXINCLUDE    +=  -include ${src}/arch/arc/include/asm/current.h
  44 endif
  45
  46 upto_gcc44    :=  $(call cc-ifversion, -le, 0404, y)
  47 atleast_gcc44 :=  $(call cc-ifversion, -ge, 0404, y)
  48
  49 cflags-$(atleast_gcc44)                 += -fsection-anchors
  50
  51 cflags-$(CONFIG_ARC_HAS_LLSC)           += -mlock
  52 cflags-$(CONFIG_ARC_HAS_SWAPE)          += -mswape
  53
  54 ifdef CONFIG_ISA_ARCV2
  55
  56 ifndef CONFIG_ARC_HAS_LL64
  57 cflags-y                                += -mno-ll64
  58 endif
  59
  60 ifndef CONFIG_ARC_HAS_DIV_REM
  61 cflags-y                                += -mno-div-rem
  62 endif
  63
  64 endif
  65
  66 cfi := $(call as-instr,.cfi_startproc\n.cfi_endproc,-DARC_DW2_UNWIND_AS_CFI)
  67 cflags-$(CONFIG_ARC_DW2_UNWIND)         += -fasynchronous-unwind-tables $(cfi)
  68
  69 ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE
  70 # Generic build system uses -O2, we want -O3
  71 # Note: No need to add to cflags-y as that happens anyways
  72 #
  73 # Disable the false maybe-uninitialized warings gcc spits out at -O3
  74 ARCH_CFLAGS += -O3 $(call cc-disable-warning,maybe-uninitialized,)
  75 endif
  76
  77 # small data is default for elf32 tool-chain. If not usable, disable it
  78 # This also allows repurposing GP as scratch reg to gcc reg allocator
  79 disable_small_data := y
  80 cflags-$(disable_small_data)            += -mno-sdata -fcall-used-gp
  81
  82 cflags-$(CONFIG_CPU_BIG_ENDIAN)         += -mbig-endian
  83 ldflags-$(CONFIG_CPU_BIG_ENDIAN)        += -EB
  84
  85 # STAR 9000518362: (fixed with binutils shipping with gcc 4.8)
  86 # arc-linux-uclibc-ld (buildroot) or arceb-elf32-ld (EZChip) don't accept
  87 # --build-id w/o "-marclinux". Default arc-elf32-ld is OK
  88 ldflags-$(upto_gcc44)                   += -marclinux
  89
  90 LIBGCC  := $(shell $(CC) $(cflags-y) --print-libgcc-file-name)
  91
  92 # Modules with short calls might break for calls into builtin-kernel
  93 KBUILD_CFLAGS_MODULE    += -mlong-calls -mno-millicode
  94
  95 # Finally dump eveything into kernel build system
  96 KBUILD_CFLAGS   += $(cflags-y)
  97 KBUILD_AFLAGS   += $(KBUILD_CFLAGS)
  98 LDFLAGS         += $(ldflags-y)
  99
 100 head-y          := arch/arc/kernel/head.o
 101
 102 # See arch/arc/Kbuild for content of core part of the kernel
 103 core-y          += arch/arc/
 104
 105 # w/o this dtb won't embed into kernel binary
 106 core-y          += arch/arc/boot/dts/
 107
 108 core-y                          += arch/arc/plat-sim/
 109 core-$(CONFIG_ARC_PLAT_TB10X)   += arch/arc/plat-tb10x/
 110 core-$(CONFIG_ARC_PLAT_AXS10X)  += arch/arc/plat-axs10x/
 111 core-$(CONFIG_ARC_PLAT_EZNPS)   += arch/arc/plat-eznps/
 112 core-$(CONFIG_ARC_SOC_HSDK)     += arch/arc/plat-hsdk/
 113
 114 ifdef CONFIG_ARC_PLAT_EZNPS
 115 KBUILD_CPPFLAGS += -I$(srctree)/arch/arc/plat-eznps/include
 116 endif
 117
 118 drivers-$(CONFIG_OPROFILE)      += arch/arc/oprofile/
 119
 120 libs-y          += arch/arc/lib/ $(LIBGCC)
 121
 122 boot            := arch/arc/boot
 123
 124 #default target for make without any arguments.
 125 KBUILD_IMAGE    := $(boot)/bootpImage
 126
 127 all:    bootpImage
 128 bootpImage: vmlinux
 129
 130 boot_targets += uImage uImage.bin uImage.gz
 131
 132 $(boot_targets): vmlinux
 133         $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 134
 135 %.dtb %.dtb.S %.dtb.o: scripts
 136         $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@
 137
 138 dtbs: scripts
 139         $(Q)$(MAKE) $(build)=$(boot)/dts
 140
 141 archclean:
 142         $(Q)$(MAKE) $(clean)=$(boot)
 143
 144 # Hacks to enable final link due to absence of link-time branch relexation
 145 # and gcc choosing optimal(shorter) branches at -O3
 146 #
 147 # vineetg Feb 2010: -mlong-calls switched off for overall kernel build
 148 # However lib/decompress_inflate.o (.init.text) calls
 149 # zlib_inflate_workspacesize (.text) causing relocation errors.
 150 # Thus forcing all exten calls in this file to be long calls
 151 export CFLAGS_decompress_inflate.o = -mmedium-calls
 152 export CFLAGS_initramfs.o = -mmedium-calls
 153 ifdef CONFIG_SMP
 154 export CFLAGS_core.o = -mmedium-calls
 155 endif