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 51ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE 52# Generic build system uses -O2, we want -O3 53# Note: No need to add to cflags-y as that happens anyways 54# 55# Disable the false maybe-uninitialized warings gcc spits out at -O3 56ARCH_CFLAGS += -O3 $(call cc-disable-warning,maybe-uninitialized,) 57endif 58 59# small data is default for elf32 tool-chain. If not usable, disable it 60# This also allows repurposing GP as scratch reg to gcc reg allocator 61disable_small_data := y 62cflags-$(disable_small_data) += -mno-sdata -fcall-used-gp 63 64cflags-$(CONFIG_CPU_BIG_ENDIAN) += -mbig-endian 65ldflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB 66 67LIBGCC = $(shell $(CC) $(cflags-y) --print-libgcc-file-name) 68 69# Modules with short calls might break for calls into builtin-kernel 70KBUILD_CFLAGS_MODULE += -mlong-calls -mno-millicode 71 72# Finally dump eveything into kernel build system 73KBUILD_CFLAGS += $(cflags-y) 74KBUILD_AFLAGS += $(KBUILD_CFLAGS) 75KBUILD_LDFLAGS += $(ldflags-y) 76 77head-y := arch/arc/kernel/head.o 78 79# See arch/arc/Kbuild for content of core part of the kernel 80core-y += arch/arc/ 81 82# w/o this dtb won't embed into kernel binary 83core-y += arch/arc/boot/dts/ 84 85core-y += arch/arc/plat-sim/ 86core-$(CONFIG_ARC_PLAT_TB10X) += arch/arc/plat-tb10x/ 87core-$(CONFIG_ARC_PLAT_AXS10X) += arch/arc/plat-axs10x/ 88core-$(CONFIG_ARC_PLAT_EZNPS) += arch/arc/plat-eznps/ 89core-$(CONFIG_ARC_SOC_HSDK) += arch/arc/plat-hsdk/ 90 91ifdef CONFIG_ARC_PLAT_EZNPS 92KBUILD_CPPFLAGS += -I$(srctree)/arch/arc/plat-eznps/include 93endif 94 95drivers-$(CONFIG_OPROFILE) += arch/arc/oprofile/ 96 97libs-y += arch/arc/lib/ $(LIBGCC) 98 99boot := arch/arc/boot 100 101#default target for make without any arguments. 102KBUILD_IMAGE := $(boot)/bootpImage 103 104all: bootpImage 105bootpImage: vmlinux 106 107boot_targets += uImage uImage.bin uImage.gz 108 109$(boot_targets): vmlinux 110 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 111 112archclean: 113 $(Q)$(MAKE) $(clean)=$(boot) 114