#
# Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
UTS_MACHINE := arc
ifeq ($(CROSS_COMPILE),)
ifndef [31mCONFIG_CPU_BIG_ENDIAN[0m
CROSS_COMPILE := arc-linux-
else
CROSS_COMPILE := arceb-linux-
endif
endif
KBUILD_DEFCONFIG := nsim_700_defconfig
cflags-y += -fno-common -pipe -fno-builtin -D__linux__
cflags-$([31mCONFIG_ISA_ARCOMPACT[0m) += -mA7
cflags-$([31mCONFIG_ISA_ARCV2[0m) += -mcpu=archs
is_700 = $(shell $(CC) -dM -E - < /dev/null | grep -q "ARC700" && echo 1 || echo 0)
ifdef [31mCONFIG_ISA_ARCOMPACT[0m
ifeq ($(is_700), 0)
$(error Toolchain not configured for ARCompact builds)
endif
endif
ifdef [31mCONFIG_ISA_ARCV2[0m
ifeq ($(is_700), 1)
$(error Toolchain not configured for ARCv2 builds)
endif
endif
ifdef [31mCONFIG_ARC_CURR_IN_REG[0m
# For a global register defintion, make sure it gets passed to every file
# We had a customer reported bug where some code built in kernel was NOT using
# any kernel headers, and missing the r25 global register
# Can't do unconditionally because of recursive include issues
# due to <linux/thread_info.h>
LINUXINCLUDE += -include ${src}/arch/arc/include/asm/current.h
endif
upto_gcc44 := $(call cc-ifversion, -le, 0404, y)
atleast_gcc44 := $(call cc-ifversion, -ge, 0404, y)
cflags-$(atleast_gcc44) += -fsection-anchors
cflags-$([31mCONFIG_ARC_HAS_LLSC[0m) += -mlock
cflags-$([31mCONFIG_ARC_HAS_SWAPE[0m) += -mswape
ifdef [31mCONFIG_ISA_ARCV2[0m
ifndef [31mCONFIG_ARC_HAS_LL64[0m
cflags-y += -mno-ll64
endif
ifndef [31mCONFIG_ARC_HAS_DIV_REM[0m
cflags-y += -mno-div-rem
endif
endif
cfi := $(call as-instr,.cfi_startproc\n.cfi_endproc,-DARC_DW2_UNWIND_AS_CFI)
cflags-$([31mCONFIG_ARC_DW2_UNWIND[0m) += -fasynchronous-unwind-tables $(cfi)
ifndef [31mCONFIG_CC_OPTIMIZE_FOR_SIZE[0m
# Generic build system uses -O2, we want -O3
# Note: No need to add to cflags-y as that happens anyways
#
# Disable the false maybe-uninitialized warings gcc spits out at -O3
ARCH_CFLAGS += -O3 $(call cc-disable-warning,maybe-uninitialized,)
endif
# small data is default for elf32 tool-chain. If not usable, disable it
# This also allows repurposing GP as scratch reg to gcc reg allocator
disable_small_data := y
cflags-$(disable_small_data) += -mno-sdata -fcall-used-gp
cflags-$([31mCONFIG_CPU_BIG_ENDIAN[0m) += -mbig-endian
ldflags-$([31mCONFIG_CPU_BIG_ENDIAN[0m) += -EB
# STAR 9000518362: (fixed with binutils shipping with gcc 4.8)
# arc-linux-uclibc-ld (buildroot) or arceb-elf32-ld (EZChip) don't accept
# --build-id w/o "-marclinux". Default arc-elf32-ld is OK
ldflags-$(upto_gcc44) += -marclinux
LIBGCC := $(shell $(CC) $(cflags-y) --print-libgcc-file-name)
# Modules with short calls might break for calls into builtin-kernel
KBUILD_CFLAGS_MODULE += -mlong-calls -mno-millicode
# Finally dump eveything into kernel build system
KBUILD_CFLAGS += $(cflags-y)
KBUILD_AFLAGS += $(KBUILD_CFLAGS)
LDFLAGS += $(ldflags-y)
head-y := arch/arc/kernel/head.o
# See arch/arc/Kbuild for content of core part of the kernel
core-y += arch/arc/
# w/o this dtb won't embed into kernel binary
core-y += arch/arc/boot/dts/
core-$([31mCONFIG_ARC_PLAT_SIM[0m) += arch/arc/plat-sim/
core-$([31mCONFIG_ARC_PLAT_TB10X[0m) += arch/arc/plat-tb10x/
core-$([31mCONFIG_ARC_PLAT_AXS10X[0m) += arch/arc/plat-axs10x/
core-$([31mCONFIG_ARC_PLAT_EZNPS[0m) += arch/arc/plat-eznps/
ifdef [31mCONFIG_ARC_PLAT_EZNPS[0m
KBUILD_CPPFLAGS += -I$(srctree)/arch/arc/plat-eznps/include
endif
drivers-$([31mCONFIG_OPROFILE[0m) += arch/arc/oprofile/
libs-y += arch/arc/lib/ $(LIBGCC)
boot := arch/arc/boot
#default target for make without any arguments.
KBUILD_IMAGE := bootpImage
all: $(KBUILD_IMAGE)
bootpImage: vmlinux
boot_targets += uImage uImage.bin uImage.gz
$(boot_targets): vmlinux
$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
%.dtb %.dtb.S %.dtb.o: scripts
$(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@
dtbs: scripts
$(Q)$(MAKE) $(build)=$(boot)/dts
archclean:
$(Q)$(MAKE) $(clean)=$(boot)
# Hacks to enable final link due to absence of link-time branch relexation
# and gcc choosing optimal(shorter) branches at -O3
#
# vineetg Feb 2010: -mlong-calls switched off for overall kernel build
# However lib/decompress_inflate.o (.init.text) calls
# zlib_inflate_workspacesize (.text) causing relocation errors.
# Thus forcing all exten calls in this file to be long calls
export CFLAGS_decompress_inflate.o = -mmedium-calls
export CFLAGS_initramfs.o = -mmedium-calls
ifdef [31mCONFIG_SMP[0m
export CFLAGS_core.o = -mmedium-calls
endif