linux/arch/arc/Makefile
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   1# SPDX-License-Identifier: GPL-2.0-only
   2#
   3# Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
   4#
   5
   6KBUILD_DEFCONFIG := haps_hs_smp_defconfig
   7
   8ifeq ($(CROSS_COMPILE),)
   9CROSS_COMPILE := $(call cc-cross-prefix, arc-linux- arceb-linux-)
  10endif
  11
  12cflags-y        += -fno-common -pipe -fno-builtin -mmedium-calls -D__linux__
  13
  14tune-mcpu-def-$(CONFIG_ISA_ARCOMPACT)   := -mcpu=arc700
  15tune-mcpu-def-$(CONFIG_ISA_ARCV2)       := -mcpu=hs38
  16
  17ifeq ($(CONFIG_ARC_TUNE_MCPU),"")
  18cflags-y                                += $(tune-mcpu-def-y)
  19else
  20tune-mcpu                               := $(shell echo $(CONFIG_ARC_TUNE_MCPU))
  21tune-mcpu-ok                            := $(call cc-option-yn, $(tune-mcpu))
  22ifeq ($(tune-mcpu-ok),y)
  23cflags-y                                += $(tune-mcpu)
  24else
  25# The flag provided by 'CONFIG_ARC_TUNE_MCPU' option isn't known by this compiler
  26# (probably the compiler is too old). Use ISA default mcpu flag instead as a safe option.
  27$(warning ** WARNING ** CONFIG_ARC_TUNE_MCPU flag '$(tune-mcpu)' is unknown, fallback to '$(tune-mcpu-def-y)')
  28cflags-y                                += $(tune-mcpu-def-y)
  29endif
  30endif
  31
  32
  33ifdef 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>
  39LINUXINCLUDE    +=  -include $(srctree)/arch/arc/include/asm/current.h
  40endif
  41
  42cflags-y                                += -fsection-anchors
  43
  44cflags-$(CONFIG_ARC_HAS_LLSC)           += -mlock
  45cflags-$(CONFIG_ARC_HAS_SWAPE)          += -mswape
  46
  47ifdef CONFIG_ISA_ARCV2
  48
  49ifdef CONFIG_ARC_USE_UNALIGNED_MEM_ACCESS
  50cflags-y                                += -munaligned-access
  51else
  52cflags-y                                += -mno-unaligned-access
  53endif
  54
  55ifndef CONFIG_ARC_HAS_LL64
  56cflags-y                                += -mno-ll64
  57endif
  58
  59ifndef CONFIG_ARC_HAS_DIV_REM
  60cflags-y                                += -mno-div-rem
  61endif
  62
  63endif
  64
  65cfi := $(call as-instr,.cfi_startproc\n.cfi_endproc,-DARC_DW2_UNWIND_AS_CFI)
  66cflags-$(CONFIG_ARC_DW2_UNWIND)         += -fasynchronous-unwind-tables $(cfi)
  67
  68# small data is default for elf32 tool-chain. If not usable, disable it
  69# This also allows repurposing GP as scratch reg to gcc reg allocator
  70disable_small_data := y
  71cflags-$(disable_small_data)            += -mno-sdata -fcall-used-gp
  72
  73cflags-$(CONFIG_CPU_BIG_ENDIAN)         += -mbig-endian
  74ldflags-$(CONFIG_CPU_BIG_ENDIAN)        += -EB
  75
  76LIBGCC  = $(shell $(CC) $(cflags-y) --print-libgcc-file-name)
  77
  78# Modules with short calls might break for calls into builtin-kernel
  79KBUILD_CFLAGS_MODULE    += -mlong-calls -mno-millicode
  80
  81# Finally dump eveything into kernel build system
  82KBUILD_CFLAGS   += $(cflags-y)
  83KBUILD_AFLAGS   += $(KBUILD_CFLAGS)
  84KBUILD_LDFLAGS  += $(ldflags-y)
  85
  86head-y          := arch/arc/kernel/head.o
  87
  88# See arch/arc/Kbuild for content of core part of the kernel
  89core-y          += arch/arc/
  90
  91# w/o this dtb won't embed into kernel binary
  92core-y          += arch/arc/boot/dts/
  93
  94core-y                          += arch/arc/plat-sim/
  95core-$(CONFIG_ARC_PLAT_TB10X)   += arch/arc/plat-tb10x/
  96core-$(CONFIG_ARC_PLAT_AXS10X)  += arch/arc/plat-axs10x/
  97core-$(CONFIG_ARC_SOC_HSDK)     += arch/arc/plat-hsdk/
  98
  99libs-y          += arch/arc/lib/ $(LIBGCC)
 100
 101boot            := arch/arc/boot
 102
 103boot_targets := uImage.bin uImage.gz uImage.lzma
 104
 105PHONY += $(boot_targets)
 106$(boot_targets): vmlinux
 107        $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 108
 109uimage-default-y                        := uImage.bin
 110uimage-default-$(CONFIG_KERNEL_GZIP)    := uImage.gz
 111uimage-default-$(CONFIG_KERNEL_LZMA)    := uImage.lzma
 112
 113PHONY += uImage
 114uImage: $(uimage-default-y)
 115        @ln -sf $< $(boot)/uImage
 116        @$(kecho) '  Image $(boot)/uImage is ready'
 117
 118CLEAN_FILES += $(boot)/uImage
 119
 120archclean:
 121        $(Q)$(MAKE) $(clean)=$(boot)
 122