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 8cflags-y += -fno-common -pipe -fno-builtin -mmedium-calls -D__linux__ 9cflags-$(CONFIG_ISA_ARCOMPACT) += -mA7 10cflags-$(CONFIG_ISA_ARCV2) += -mcpu=hs38 11 12ifdef 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> 18LINUXINCLUDE += -include ${src}/arch/arc/include/asm/current.h 19endif 20 21cflags-y += -fsection-anchors 22 23cflags-$(CONFIG_ARC_HAS_LLSC) += -mlock 24cflags-$(CONFIG_ARC_HAS_SWAPE) += -mswape 25 26ifdef CONFIG_ISA_ARCV2 27 28ifdef CONFIG_ARC_USE_UNALIGNED_MEM_ACCESS 29cflags-y += -munaligned-access 30else 31cflags-y += -mno-unaligned-access 32endif 33 34ifndef CONFIG_ARC_HAS_LL64 35cflags-y += -mno-ll64 36endif 37 38ifndef CONFIG_ARC_HAS_DIV_REM 39cflags-y += -mno-div-rem 40endif 41 42endif 43 44cfi := $(call as-instr,.cfi_startproc\n.cfi_endproc,-DARC_DW2_UNWIND_AS_CFI) 45cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables $(cfi) 46 47ifndef 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 52ARCH_CFLAGS += -O3 $(call cc-disable-warning,maybe-uninitialized,) 53endif 54 55# small data is default for elf32 tool-chain. If not usable, disable it 56# This also allows repurposing GP as scratch reg to gcc reg allocator 57disable_small_data := y 58cflags-$(disable_small_data) += -mno-sdata -fcall-used-gp 59 60cflags-$(CONFIG_CPU_BIG_ENDIAN) += -mbig-endian 61ldflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB 62 63LIBGCC = $(shell $(CC) $(cflags-y) --print-libgcc-file-name) 64 65# Modules with short calls might break for calls into builtin-kernel 66KBUILD_CFLAGS_MODULE += -mlong-calls -mno-millicode 67 68# Finally dump eveything into kernel build system 69KBUILD_CFLAGS += $(cflags-y) 70KBUILD_AFLAGS += $(KBUILD_CFLAGS) 71KBUILD_LDFLAGS += $(ldflags-y) 72 73head-y := arch/arc/kernel/head.o 74 75# See arch/arc/Kbuild for content of core part of the kernel 76core-y += arch/arc/ 77 78# w/o this dtb won't embed into kernel binary 79core-y += arch/arc/boot/dts/ 80 81core-y += arch/arc/plat-sim/ 82core-$(CONFIG_ARC_PLAT_TB10X) += arch/arc/plat-tb10x/ 83core-$(CONFIG_ARC_PLAT_AXS10X) += arch/arc/plat-axs10x/ 84core-$(CONFIG_ARC_PLAT_EZNPS) += arch/arc/plat-eznps/ 85core-$(CONFIG_ARC_SOC_HSDK) += arch/arc/plat-hsdk/ 86 87ifdef CONFIG_ARC_PLAT_EZNPS 88KBUILD_CPPFLAGS += -I$(srctree)/arch/arc/plat-eznps/include 89endif 90 91drivers-$(CONFIG_OPROFILE) += arch/arc/oprofile/ 92 93libs-y += arch/arc/lib/ $(LIBGCC) 94 95boot := arch/arc/boot 96 97#default target for make without any arguments. 98KBUILD_IMAGE := $(boot)/bootpImage 99 100all: bootpImage 101bootpImage: vmlinux 102 103boot_targets += uImage uImage.bin uImage.gz 104 105$(boot_targets): vmlinux 106 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 107 108archclean: 109 $(Q)$(MAKE) $(clean)=$(boot) 110