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 := $(shell echo $(CONFIG_ARC_TUNE_MCPU)) 21tune-mcpu-ok := $(call cc-option-yn, $(tune-mcpu)) 22ifeq ($(tune-mcpu-ok),y) 23cflags-y += $(tune-mcpu) 24else 25# The flag provided by 'CONFIG_ARC_TUNE_MCPU' option isn't known by this compiler 26# (probably the compiler is too old). Use ISA default mcpu flag instead as a safe option. 27$(warning ** WARNING ** CONFIG_ARC_TUNE_MCPU flag '$(tune-mcpu)' is unknown, fallback to '$(tune-mcpu-def-y)') 28cflags-y += $(tune-mcpu-def-y) 29endif 30endif 31 32 33ifdef CONFIG_ARC_CURR_IN_REG 34# For a global register defintion, make sure it gets passed to every file 35# We had a customer reported bug where some code built in kernel was NOT using 36# any kernel headers, and missing the r25 global register 37# Can't do unconditionally because of recursive include issues 38# due to <linux/thread_info.h> 39LINUXINCLUDE += -include $(srctree)/arch/arc/include/asm/current.h 40endif 41 42cflags-y += -fsection-anchors 43 44cflags-$(CONFIG_ARC_HAS_LLSC) += -mlock 45cflags-$(CONFIG_ARC_HAS_SWAPE) += -mswape 46 47ifdef CONFIG_ISA_ARCV2 48 49ifdef CONFIG_ARC_USE_UNALIGNED_MEM_ACCESS 50cflags-y += -munaligned-access 51else 52cflags-y += -mno-unaligned-access 53endif 54 55ifndef CONFIG_ARC_HAS_LL64 56cflags-y += -mno-ll64 57endif 58 59ifndef CONFIG_ARC_HAS_DIV_REM 60cflags-y += -mno-div-rem 61endif 62 63endif 64 65cfi := $(call as-instr,.cfi_startproc\n.cfi_endproc,-DARC_DW2_UNWIND_AS_CFI) 66cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables $(cfi) 67 68# small data is default for elf32 tool-chain. If not usable, disable it 69# This also allows repurposing GP as scratch reg to gcc reg allocator 70disable_small_data := y 71cflags-$(disable_small_data) += -mno-sdata -fcall-used-gp 72 73cflags-$(CONFIG_CPU_BIG_ENDIAN) += -mbig-endian 74ldflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB 75 76LIBGCC = $(shell $(CC) $(cflags-y) --print-libgcc-file-name) 77 78# Modules with short calls might break for calls into builtin-kernel 79KBUILD_CFLAGS_MODULE += -mlong-calls -mno-millicode 80 81# Finally dump eveything into kernel build system 82KBUILD_CFLAGS += $(cflags-y) 83KBUILD_AFLAGS += $(KBUILD_CFLAGS) 84KBUILD_LDFLAGS += $(ldflags-y) 85 86head-y := arch/arc/kernel/head.o 87 88# See arch/arc/Kbuild for content of core part of the kernel 89core-y += arch/arc/ 90 91# w/o this dtb won't embed into kernel binary 92core-y += arch/arc/boot/dts/ 93 94core-y += arch/arc/plat-sim/ 95core-$(CONFIG_ARC_PLAT_TB10X) += arch/arc/plat-tb10x/ 96core-$(CONFIG_ARC_PLAT_AXS10X) += arch/arc/plat-axs10x/ 97core-$(CONFIG_ARC_SOC_HSDK) += arch/arc/plat-hsdk/ 98 99libs-y += arch/arc/lib/ $(LIBGCC) 100 101boot := arch/arc/boot 102 103boot_targets := uImage.bin uImage.gz uImage.lzma 104 105PHONY += $(boot_targets) 106$(boot_targets): vmlinux 107 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 108 109uimage-default-y := uImage.bin 110uimage-default-$(CONFIG_KERNEL_GZIP) := uImage.gz 111uimage-default-$(CONFIG_KERNEL_LZMA) := uImage.lzma 112 113PHONY += uImage 114uImage: $(uimage-default-y) 115 @ln -sf $< $(boot)/uImage 116 @$(kecho) ' Image $(boot)/uImage is ready' 117 118CLEAN_FILES += $(boot)/uImage 119 120archclean: 121 $(Q)$(MAKE) $(clean)=$(boot) 122