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