1# 2# Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) 3# 4# This program is free software; you can redistribute it and/or modify 5# it under the terms of the GNU General Public License version 2 as 6# published by the Free Software Foundation. 7# 8 9ifeq ($(CROSS_COMPILE),) 10ifndef CONFIG_CPU_BIG_ENDIAN 11CROSS_COMPILE := arc-linux- 12else 13CROSS_COMPILE := arceb-linux- 14endif 15endif 16 17KBUILD_DEFCONFIG := nsim_700_defconfig 18 19cflags-y += -fno-common -pipe -fno-builtin -mmedium-calls -D__linux__ 20cflags-$(CONFIG_ISA_ARCOMPACT) += -mA7 21cflags-$(CONFIG_ISA_ARCV2) += -mcpu=archs 22 23is_700 = $(shell $(CC) -dM -E - < /dev/null | grep -q "ARC700" && echo 1 || echo 0) 24 25ifdef CONFIG_ISA_ARCOMPACT 26ifeq ($(is_700), 0) 27 $(error Toolchain not configured for ARCompact builds) 28endif 29endif 30 31ifdef CONFIG_ISA_ARCV2 32ifeq ($(is_700), 1) 33 $(error Toolchain not configured for ARCv2 builds) 34endif 35endif 36 37ifdef CONFIG_ARC_CURR_IN_REG 38# For a global register defintion, make sure it gets passed to every file 39# We had a customer reported bug where some code built in kernel was NOT using 40# any kernel headers, and missing the r25 global register 41# Can't do unconditionally because of recursive include issues 42# due to <linux/thread_info.h> 43LINUXINCLUDE += -include ${src}/arch/arc/include/asm/current.h 44endif 45 46cflags-y += -fsection-anchors 47 48cflags-$(CONFIG_ARC_HAS_LLSC) += -mlock 49cflags-$(CONFIG_ARC_HAS_SWAPE) += -mswape 50 51ifdef CONFIG_ISA_ARCV2 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 66ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE 67# Generic build system uses -O2, we want -O3 68# Note: No need to add to cflags-y as that happens anyways 69# 70# Disable the false maybe-uninitialized warings gcc spits out at -O3 71ARCH_CFLAGS += -O3 $(call cc-disable-warning,maybe-uninitialized,) 72endif 73 74# small data is default for elf32 tool-chain. If not usable, disable it 75# This also allows repurposing GP as scratch reg to gcc reg allocator 76disable_small_data := y 77cflags-$(disable_small_data) += -mno-sdata -fcall-used-gp 78 79cflags-$(CONFIG_CPU_BIG_ENDIAN) += -mbig-endian 80ldflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB 81 82LIBGCC := $(shell $(CC) $(cflags-y) --print-libgcc-file-name) 83 84# Modules with short calls might break for calls into builtin-kernel 85KBUILD_CFLAGS_MODULE += -mlong-calls -mno-millicode 86 87# Finally dump eveything into kernel build system 88KBUILD_CFLAGS += $(cflags-y) 89KBUILD_AFLAGS += $(KBUILD_CFLAGS) 90KBUILD_LDFLAGS += $(ldflags-y) 91 92head-y := arch/arc/kernel/head.o 93 94# See arch/arc/Kbuild for content of core part of the kernel 95core-y += arch/arc/ 96 97# w/o this dtb won't embed into kernel binary 98core-y += arch/arc/boot/dts/ 99 100core-y += arch/arc/plat-sim/ 101core-$(CONFIG_ARC_PLAT_TB10X) += arch/arc/plat-tb10x/ 102core-$(CONFIG_ARC_PLAT_AXS10X) += arch/arc/plat-axs10x/ 103core-$(CONFIG_ARC_PLAT_EZNPS) += arch/arc/plat-eznps/ 104core-$(CONFIG_ARC_SOC_HSDK) += arch/arc/plat-hsdk/ 105 106ifdef CONFIG_ARC_PLAT_EZNPS 107KBUILD_CPPFLAGS += -I$(srctree)/arch/arc/plat-eznps/include 108endif 109 110drivers-$(CONFIG_OPROFILE) += arch/arc/oprofile/ 111 112libs-y += arch/arc/lib/ $(LIBGCC) 113 114boot := arch/arc/boot 115 116#default target for make without any arguments. 117KBUILD_IMAGE := $(boot)/bootpImage 118 119all: bootpImage 120bootpImage: vmlinux 121 122boot_targets += uImage uImage.bin uImage.gz 123 124$(boot_targets): vmlinux 125 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 126 127%.dtb %.dtb.S %.dtb.o: scripts 128 $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@ 129 130dtbs: scripts 131 $(Q)$(MAKE) $(build)=$(boot)/dts 132 133archclean: 134 $(Q)$(MAKE) $(clean)=$(boot) 135