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 := haps_hs_smp_defconfig 7 8ifeq ($(CROSS_COMPILE),) 9CROSS_COMPILE := $(call cc-cross-prefix, arc-linux- arceb-linux-) 10endif 11 12cflags-y += -fno-common -pipe -fno-builtin -mmedium-calls -D__linux__ 13 14tune-mcpu-def-$(CONFIG_ISA_ARCOMPACT) := -mcpu=arc700 15tune-mcpu-def-$(CONFIG_ISA_ARCV2) := -mcpu=hs38 16 17ifeq ($(CONFIG_ARC_TUNE_MCPU),) 18cflags-y += $(tune-mcpu-def-y) 19else 20tune-mcpu := $(CONFIG_ARC_TUNE_MCPU) 21ifneq ($(call cc-option,$(tune-mcpu)),) 22cflags-y += $(tune-mcpu) 23else 24# The flag provided by 'CONFIG_ARC_TUNE_MCPU' option isn't known by this compiler 25# (probably the compiler is too old). Use ISA default mcpu flag instead as a safe option. 26$(warning ** WARNING ** CONFIG_ARC_TUNE_MCPU flag '$(tune-mcpu)' is unknown, fallback to '$(tune-mcpu-def-y)') 27cflags-y += $(tune-mcpu-def-y) 28endif 29endif 30 31 32ifdef CONFIG_ARC_CURR_IN_REG 33# For a global register definition, make sure it gets passed to every file 34# We had a customer reported bug where some code built in kernel was NOT using 35# any kernel headers, and missing the r25 global register 36# Can't do unconditionally because of recursive include issues 37# due to <linux/thread_info.h> 38LINUXINCLUDE += -include $(srctree)/arch/arc/include/asm/current.h 39endif 40 41cflags-y += -fsection-anchors 42 43cflags-$(CONFIG_ARC_HAS_LLSC) += -mlock 44cflags-$(CONFIG_ARC_HAS_SWAPE) += -mswape 45 46ifdef CONFIG_ISA_ARCV2 47 48ifdef CONFIG_ARC_USE_UNALIGNED_MEM_ACCESS 49cflags-y += -munaligned-access 50else 51cflags-y += -mno-unaligned-access 52endif 53 54ifndef CONFIG_ARC_HAS_LL64 55cflags-y += -mno-ll64 56endif 57 58ifndef CONFIG_ARC_HAS_DIV_REM 59cflags-y += -mno-div-rem 60endif 61 62endif 63 64cfi := $(call as-instr,.cfi_startproc\n.cfi_endproc,-DARC_DW2_UNWIND_AS_CFI) 65cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables $(cfi) 66 67# small data is default for elf32 tool-chain. If not usable, disable it 68# This also allows repurposing GP as scratch reg to gcc reg allocator 69disable_small_data := y 70cflags-$(disable_small_data) += -mno-sdata -fcall-used-gp 71 72cflags-$(CONFIG_CPU_BIG_ENDIAN) += -mbig-endian 73ldflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB 74 75LIBGCC = $(shell $(CC) $(cflags-y) --print-libgcc-file-name) 76 77# Modules with short calls might break for calls into builtin-kernel 78KBUILD_CFLAGS_MODULE += -mlong-calls -mno-millicode 79 80# Finally dump eveything into kernel build system 81KBUILD_CFLAGS += $(cflags-y) 82KBUILD_AFLAGS += $(KBUILD_CFLAGS) 83KBUILD_LDFLAGS += $(ldflags-y) 84 85head-y := arch/arc/kernel/head.o 86 87# w/o this dtb won't embed into kernel binary 88core-y += arch/arc/boot/dts/ 89 90core-y += arch/arc/plat-sim/ 91core-$(CONFIG_ARC_PLAT_TB10X) += arch/arc/plat-tb10x/ 92core-$(CONFIG_ARC_PLAT_AXS10X) += arch/arc/plat-axs10x/ 93core-$(CONFIG_ARC_SOC_HSDK) += arch/arc/plat-hsdk/ 94 95libs-y += arch/arc/lib/ $(LIBGCC) 96 97boot := arch/arc/boot 98 99boot_targets := uImage.bin uImage.gz uImage.lzma 100 101PHONY += $(boot_targets) 102$(boot_targets): vmlinux 103 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 104 105uimage-default-y := uImage.bin 106uimage-default-$(CONFIG_KERNEL_GZIP) := uImage.gz 107uimage-default-$(CONFIG_KERNEL_LZMA) := uImage.lzma 108 109PHONY += uImage 110uImage: $(uimage-default-y) 111 @ln -sf $< $(boot)/uImage 112 @$(kecho) ' Image $(boot)/uImage is ready' 113 114CLEAN_FILES += $(boot)/uImage 115