arch/arc/Makefile

   1 # SPDX-License-Identifier: GPL-2.0-only
   2 #
   3 # Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
   4 #
   5
   6 KBUILD_DEFCONFIG := nsim_hs_defconfig
   7
   8 ifeq ($(CROSS_COMPILE),)
   9 CROSS_COMPILE := $(call cc-cross-prefix, arc-linux- arceb-linux-)
  10 endif
  11
  12 cflags-y        += -fno-common -pipe -fno-builtin -mmedium-calls -D__linux__
  13 cflags-$(CONFIG_ISA_ARCOMPACT)  += -mA7
  14 cflags-$(CONFIG_ISA_ARCV2)      += -mcpu=hs38
  15
  16 ifdef CONFIG_ARC_CURR_IN_REG
  17 # For a global register defintion, make sure it gets passed to every file
  18 # We had a customer reported bug where some code built in kernel was NOT using
  19 # any kernel headers, and missing the r25 global register
  20 # Can't do unconditionally because of recursive include issues
  21 # due to <linux/thread_info.h>
  22 LINUXINCLUDE    +=  -include $(srctree)/arch/arc/include/asm/current.h
  23 endif
  24
  25 cflags-y                                += -fsection-anchors
  26
  27 cflags-$(CONFIG_ARC_HAS_LLSC)           += -mlock
  28 cflags-$(CONFIG_ARC_HAS_SWAPE)          += -mswape
  29
  30 ifdef CONFIG_ISA_ARCV2
  31
  32 ifdef CONFIG_ARC_USE_UNALIGNED_MEM_ACCESS
  33 cflags-y                                += -munaligned-access
  34 else
  35 cflags-y                                += -mno-unaligned-access
  36 endif
  37
  38 ifndef CONFIG_ARC_HAS_LL64
  39 cflags-y                                += -mno-ll64
  40 endif
  41
  42 ifndef CONFIG_ARC_HAS_DIV_REM
  43 cflags-y                                += -mno-div-rem
  44 endif
  45
  46 endif
  47
  48 cfi := $(call as-instr,.cfi_startproc\n.cfi_endproc,-DARC_DW2_UNWIND_AS_CFI)
  49 cflags-$(CONFIG_ARC_DW2_UNWIND)         += -fasynchronous-unwind-tables $(cfi)
  50
  51 ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE
  52 # Generic build system uses -O2, we want -O3
  53 # Note: No need to add to cflags-y as that happens anyways
  54 #
  55 # Disable the false maybe-uninitialized warings gcc spits out at -O3
  56 ARCH_CFLAGS += -O3 $(call cc-disable-warning,maybe-uninitialized,)
  57 endif
  58
  59 # small data is default for elf32 tool-chain. If not usable, disable it
  60 # This also allows repurposing GP as scratch reg to gcc reg allocator
  61 disable_small_data := y
  62 cflags-$(disable_small_data)            += -mno-sdata -fcall-used-gp
  63
  64 cflags-$(CONFIG_CPU_BIG_ENDIAN)         += -mbig-endian
  65 ldflags-$(CONFIG_CPU_BIG_ENDIAN)        += -EB
  66
  67 LIBGCC  = $(shell $(CC) $(cflags-y) --print-libgcc-file-name)
  68
  69 # Modules with short calls might break for calls into builtin-kernel
  70 KBUILD_CFLAGS_MODULE    += -mlong-calls -mno-millicode
  71
  72 # Finally dump eveything into kernel build system
  73 KBUILD_CFLAGS   += $(cflags-y)
  74 KBUILD_AFLAGS   += $(KBUILD_CFLAGS)
  75 KBUILD_LDFLAGS  += $(ldflags-y)
  76
  77 head-y          := arch/arc/kernel/head.o
  78
  79 # See arch/arc/Kbuild for content of core part of the kernel
  80 core-y          += arch/arc/
  81
  82 # w/o this dtb won't embed into kernel binary
  83 core-y          += arch/arc/boot/dts/
  84
  85 core-y                          += arch/arc/plat-sim/
  86 core-$(CONFIG_ARC_PLAT_TB10X)   += arch/arc/plat-tb10x/
  87 core-$(CONFIG_ARC_PLAT_AXS10X)  += arch/arc/plat-axs10x/
  88 core-$(CONFIG_ARC_PLAT_EZNPS)   += arch/arc/plat-eznps/
  89 core-$(CONFIG_ARC_SOC_HSDK)     += arch/arc/plat-hsdk/
  90
  91 ifdef CONFIG_ARC_PLAT_EZNPS
  92 KBUILD_CPPFLAGS += -I$(srctree)/arch/arc/plat-eznps/include
  93 endif
  94
  95 drivers-$(CONFIG_OPROFILE)      += arch/arc/oprofile/
  96
  97 libs-y          += arch/arc/lib/ $(LIBGCC)
  98
  99 boot            := arch/arc/boot
 100
 101 #default target for make without any arguments.
 102 KBUILD_IMAGE    := $(boot)/bootpImage
 103
 104 all:    bootpImage
 105 bootpImage: vmlinux
 106
 107 boot_targets += uImage uImage.bin uImage.gz
 108
 109 $(boot_targets): vmlinux
 110         $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 111
 112 archclean:
 113         $(Q)$(MAKE) $(clean)=$(boot)