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 9UTS_MACHINE := arc 10 11KBUILD_DEFCONFIG := fpga_defconfig 12 13# For ARC FPGA Platforms 14platform-$(CONFIG_ARC_PLAT_FPGA_LEGACY) := arcfpga 15#New platform adds here 16 17PLATFORM := $(platform-y) 18export PLATFORM 19 20cflags-y += -Iarch/arc/plat-$(PLATFORM)/include 21cflags-y += -mA7 -fno-common -pipe -fno-builtin -D__linux__ 22 23atleast_gcc44 := $(call cc-ifversion, -gt, 0402, y) 24cflags-$(atleast_gcc44) += -fsection-anchors 25 26cflags-$(CONFIG_ARC_HAS_LLSC) += -mlock 27cflags-$(CONFIG_ARC_HAS_SWAPE) += -mswape 28cflags-$(CONFIG_ARC_HAS_RTSC) += -mrtsc 29cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables 30 31ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE 32# Generic build system uses -O2, we want -O3 33cflags-y += -O3 34endif 35 36# small data is default for elf32 tool-chain. If not usable, disable it 37# This also allows repurposing GP as scratch reg to gcc reg allocator 38disable_small_data := y 39cflags-$(disable_small_data) += -mno-sdata -fcall-used-gp 40 41cflags-$(CONFIG_CPU_BIG_ENDIAN) += -mbig-endian 42ldflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB 43 44# STAR 9000518362: 45# arc-linux-uclibc-ld (buildroot) or arceb-elf32-ld (EZChip) don't accept 46# --build-id w/o "-marclinux". 47# Default arc-elf32-ld is OK 48ldflags-y += -marclinux 49 50ARC_LIBGCC := -mA7 51cflags-$(CONFIG_ARC_HAS_HW_MPY) += -multcost=16 52 53ifndef CONFIG_ARC_HAS_HW_MPY 54 cflags-y += -mno-mpy 55 56# newlib for ARC700 assumes MPY to be always present, which is generally true 57# However, if someone really doesn't want MPY, we need to use the 600 ver 58# which coupled with -mno-mpy will use mpy emulation 59# With gcc 4.4.7, -mno-mpy is enough to make any other related adjustments, 60# e.g. increased cost of MPY. With gcc 4.2.1 this had to be explicitly hinted 61 62 ARC_LIBGCC := -marc600 63 ifneq ($(atleast_gcc44),y) 64 cflags-y += -multcost=30 65 endif 66endif 67 68LIBGCC := $(shell $(CC) $(ARC_LIBGCC) $(cflags-y) --print-libgcc-file-name) 69 70# Modules with short calls might break for calls into builtin-kernel 71KBUILD_CFLAGS_MODULE += -mlong-calls 72 73# Finally dump eveything into kernel build system 74KBUILD_CFLAGS += $(cflags-y) 75KBUILD_AFLAGS += $(KBUILD_CFLAGS) 76LDFLAGS += $(ldflags-y) 77 78# Needed for Linker script preprocessing 79KBUILD_CPPFLAGS += -Iarch/arc/plat-$(PLATFORM)/include 80 81head-y := arch/arc/kernel/head.o 82 83# See arch/arc/Kbuild for content of core part of the kernel 84core-y += arch/arc/ 85 86# w/o this dtb won't embed into kernel binary 87core-y += arch/arc/boot/dts/ 88 89# w/o this ifneq, make ARCH=arc clean was crapping out 90ifneq ($(platform-y),) 91core-y += arch/arc/plat-$(PLATFORM)/ 92endif 93 94libs-y += arch/arc/lib/ $(LIBGCC) 95 96#default target for make without any arguements. 97KBUILD_IMAGE := bootpImage 98 99all: $(KBUILD_IMAGE) 100boot := arch/arc/boot 101 102bootpImage: vmlinux 103 104uImage: vmlinux 105 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 106 107%.dtb %.dtb.S %.dtb.o: scripts 108 $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@ 109 110dtbs: scripts 111 $(Q)$(MAKE) $(build)=$(boot)/dts dtbs 112 113archclean: 114 $(Q)$(MAKE) $(clean)=$(boot) 115 116# Hacks to enable final link due to absence of link-time branch relexation 117# and gcc choosing optimal(shorter) branches at -O3 118# 119# vineetg Feb 2010: -mlong-calls switched off for overall kernel build 120# However lib/decompress_inflate.o (.init.text) calls 121# zlib_inflate_workspacesize (.text) causing relocation errors. 122# Thus forcing all exten calls in this file to be long calls 123export CFLAGS_decompress_inflate.o = -mmedium-calls 124export CFLAGS_initramfs.o = -mmedium-calls 125