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 := haps_hs_smp_defconfig
   7
   8 ifeq ($(CROSS_COMPILE),)
   9 CROSS_COMPILE := $(call cc-cross-prefix, arc-linux- arceb-linux-)
  10 endif
  11
  12 cflags-y        += -fno-common -pipe -fno-builtin -mmedium-calls -D__linux__
  13
  14 tune-mcpu-def-$(CONFIG_ISA_ARCOMPACT)   := -mcpu=arc700
  15 tune-mcpu-def-$(CONFIG_ISA_ARCV2)       := -mcpu=hs38
  16
  17 ifeq ($(CONFIG_ARC_TUNE_MCPU),"")
  18 cflags-y                                += $(tune-mcpu-def-y)
  19 else
  20 tune-mcpu                               := $(shell echo $(CONFIG_ARC_TUNE_MCPU))
  21 tune-mcpu-ok                            := $(call cc-option-yn, $(tune-mcpu))
  22 ifeq ($(tune-mcpu-ok),y)
  23 cflags-y                                += $(tune-mcpu)
  24 else
  25 # The flag provided by 'CONFIG_ARC_TUNE_MCPU' option isn't known by this compiler
  26 # (probably the compiler is too old). Use ISA default mcpu flag instead as a safe option.
  27 $(warning ** WARNING ** CONFIG_ARC_TUNE_MCPU flag '$(tune-mcpu)' is unknown, fallback to '$(tune-mcpu-def-y)')
  28 cflags-y                                += $(tune-mcpu-def-y)
  29 endif
  30 endif
  31
  32
  33 ifdef CONFIG_ARC_CURR_IN_REG
  34 # For a global register definition, make sure it gets passed to every file
  35 # We had a customer reported bug where some code built in kernel was NOT using
  36 # any kernel headers, and missing the r25 global register
  37 # Can't do unconditionally because of recursive include issues
  38 # due to <linux/thread_info.h>
  39 LINUXINCLUDE    +=  -include $(srctree)/arch/arc/include/asm/current.h
  40 endif
  41
  42 cflags-y                                += -fsection-anchors
  43
  44 cflags-$(CONFIG_ARC_HAS_LLSC)           += -mlock
  45 cflags-$(CONFIG_ARC_HAS_SWAPE)          += -mswape
  46
  47 ifdef CONFIG_ISA_ARCV2
  48
  49 ifdef CONFIG_ARC_USE_UNALIGNED_MEM_ACCESS
  50 cflags-y                                += -munaligned-access
  51 else
  52 cflags-y                                += -mno-unaligned-access
  53 endif
  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 cfi := $(call as-instr,.cfi_startproc\n.cfi_endproc,-DARC_DW2_UNWIND_AS_CFI)
  66 cflags-$(CONFIG_ARC_DW2_UNWIND)         += -fasynchronous-unwind-tables $(cfi)
  67
  68 # small data is default for elf32 tool-chain. If not usable, disable it
  69 # This also allows repurposing GP as scratch reg to gcc reg allocator
  70 disable_small_data := y
  71 cflags-$(disable_small_data)            += -mno-sdata -fcall-used-gp
  72
  73 cflags-$(CONFIG_CPU_BIG_ENDIAN)         += -mbig-endian
  74 ldflags-$(CONFIG_CPU_BIG_ENDIAN)        += -EB
  75
  76 LIBGCC  = $(shell $(CC) $(cflags-y) --print-libgcc-file-name)
  77
  78 # Modules with short calls might break for calls into builtin-kernel
  79 KBUILD_CFLAGS_MODULE    += -mlong-calls -mno-millicode
  80
  81 # Finally dump eveything into kernel build system
  82 KBUILD_CFLAGS   += $(cflags-y)
  83 KBUILD_AFLAGS   += $(KBUILD_CFLAGS)
  84 KBUILD_LDFLAGS  += $(ldflags-y)
  85
  86 head-y          := arch/arc/kernel/head.o
  87
  88 # w/o this dtb won't embed into kernel binary
  89 core-y          += arch/arc/boot/dts/
  90
  91 core-y                          += arch/arc/plat-sim/
  92 core-$(CONFIG_ARC_PLAT_TB10X)   += arch/arc/plat-tb10x/
  93 core-$(CONFIG_ARC_PLAT_AXS10X)  += arch/arc/plat-axs10x/
  94 core-$(CONFIG_ARC_SOC_HSDK)     += arch/arc/plat-hsdk/
  95
  96 libs-y          += arch/arc/lib/ $(LIBGCC)
  97
  98 boot            := arch/arc/boot
  99
 100 boot_targets := uImage.bin uImage.gz uImage.lzma
 101
 102 PHONY += $(boot_targets)
 103 $(boot_targets): vmlinux
 104         $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 105
 106 uimage-default-y                        := uImage.bin
 107 uimage-default-$(CONFIG_KERNEL_GZIP)    := uImage.gz
 108 uimage-default-$(CONFIG_KERNEL_LZMA)    := uImage.lzma
 109
 110 PHONY += uImage
 111 uImage: $(uimage-default-y)
 112         @ln -sf $< $(boot)/uImage
 113         @$(kecho) '  Image $(boot)/uImage is ready'
 114
 115 CLEAN_FILES += $(boot)/uImage
 116
 117 archclean:
 118         $(Q)$(MAKE) $(clean)=$(boot)