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 := nsim_hs_defconfig 7 8ifeq ($(CROSS_COMPILE),) 9CROSS_COMPILE := $(call cc-cross-prefix, arc-linux- arceb-linux-) 10endif 11 12cflags-y += -fno-common -pipe -fno-builtin -mmedium-calls -D__linux__ 13cflags-$(CONFIG_ISA_ARCOMPACT) += -mA7 14cflags-$(CONFIG_ISA_ARCV2) += -mcpu=hs38 15 16ifdef 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> 22LINUXINCLUDE += -include $(srctree)/arch/arc/include/asm/current.h 23endif 24 25cflags-y += -fsection-anchors 26 27cflags-$(CONFIG_ARC_HAS_LLSC) += -mlock 28cflags-$(CONFIG_ARC_HAS_SWAPE) += -mswape 29 30ifdef CONFIG_ISA_ARCV2 31 32ifdef CONFIG_ARC_USE_UNALIGNED_MEM_ACCESS 33cflags-y += -munaligned-access 34else 35cflags-y += -mno-unaligned-access 36endif 37 38ifndef CONFIG_ARC_HAS_LL64 39cflags-y += -mno-ll64 40endif 41 42ifndef CONFIG_ARC_HAS_DIV_REM 43cflags-y += -mno-div-rem 44endif 45 46endif 47 48cfi := $(call as-instr,.cfi_startproc\n.cfi_endproc,-DARC_DW2_UNWIND_AS_CFI) 49cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables $(cfi) 50 51# small data is default for elf32 tool-chain. If not usable, disable it 52# This also allows repurposing GP as scratch reg to gcc reg allocator 53disable_small_data := y 54cflags-$(disable_small_data) += -mno-sdata -fcall-used-gp 55 56cflags-$(CONFIG_CPU_BIG_ENDIAN) += -mbig-endian 57ldflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB 58 59LIBGCC = $(shell $(CC) $(cflags-y) --print-libgcc-file-name) 60 61# Modules with short calls might break for calls into builtin-kernel 62KBUILD_CFLAGS_MODULE += -mlong-calls -mno-millicode 63 64# Finally dump eveything into kernel build system 65KBUILD_CFLAGS += $(cflags-y) 66KBUILD_AFLAGS += $(KBUILD_CFLAGS) 67KBUILD_LDFLAGS += $(ldflags-y) 68 69head-y := arch/arc/kernel/head.o 70 71# See arch/arc/Kbuild for content of core part of the kernel 72core-y += arch/arc/ 73 74# w/o this dtb won't embed into kernel binary 75core-y += arch/arc/boot/dts/ 76 77core-y += arch/arc/plat-sim/ 78core-$(CONFIG_ARC_PLAT_TB10X) += arch/arc/plat-tb10x/ 79core-$(CONFIG_ARC_PLAT_AXS10X) += arch/arc/plat-axs10x/ 80core-$(CONFIG_ARC_PLAT_EZNPS) += arch/arc/plat-eznps/ 81core-$(CONFIG_ARC_SOC_HSDK) += arch/arc/plat-hsdk/ 82 83ifdef CONFIG_ARC_PLAT_EZNPS 84KBUILD_CPPFLAGS += -I$(srctree)/arch/arc/plat-eznps/include 85endif 86 87drivers-$(CONFIG_OPROFILE) += arch/arc/oprofile/ 88 89libs-y += arch/arc/lib/ $(LIBGCC) 90 91boot := arch/arc/boot 92 93#default target for make without any arguments. 94KBUILD_IMAGE := $(boot)/bootpImage 95 96all: bootpImage 97bootpImage: vmlinux 98 99boot_targets += uImage uImage.bin uImage.gz 100 101$(boot_targets): vmlinux 102 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 103 104archclean: 105 $(Q)$(MAKE) $(clean)=$(boot) 106