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