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 ($(CROSS_COMPILE),) 10ifndef CONFIG_CPU_BIG_ENDIAN 11CROSS_COMPILE := arc-linux- 12else 13CROSS_COMPILE := arceb-linux- 14endif 15endif 16 17KBUILD_DEFCONFIG := nsim_700_defconfig 18 19cflags-y += -fno-common -pipe -fno-builtin -D__linux__ 20cflags-$(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 46upto_gcc44 := $(call cc-ifversion, -le, 0404, y) 47atleast_gcc44 := $(call cc-ifversion, -ge, 0404, y) 48 49cflags-$(atleast_gcc44) += -fsection-anchors 50 51cflags-$(CONFIG_ARC_HAS_LLSC) += -mlock 52cflags-$(CONFIG_ARC_HAS_SWAPE) += -mswape 53 54ifdef CONFIG_ISA_ARCV2 55 56ifndef CONFIG_ARC_HAS_LL64 57cflags-y += -mno-ll64 58endif 59 60ifndef CONFIG_ARC_HAS_DIV_REM 61cflags-y += -mno-div-rem 62endif 63 64endif 65 66cfi := $(call as-instr,.cfi_startproc\n.cfi_endproc,-DARC_DW2_UNWIND_AS_CFI) 67cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables $(cfi) 68 69ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE 70# Generic build system uses -O2, we want -O3 71# Note: No need to add to cflags-y as that happens anyways 72# 73# Disable the false maybe-uninitialized warings gcc spits out at -O3 74ARCH_CFLAGS += -O3 $(call cc-disable-warning,maybe-uninitialized,) 75endif 76 77# small data is default for elf32 tool-chain. If not usable, disable it 78# This also allows repurposing GP as scratch reg to gcc reg allocator 79disable_small_data := y 80cflags-$(disable_small_data) += -mno-sdata -fcall-used-gp 81 82cflags-$(CONFIG_CPU_BIG_ENDIAN) += -mbig-endian 83ldflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB 84 85# STAR 9000518362: (fixed with binutils shipping with gcc 4.8) 86# arc-linux-uclibc-ld (buildroot) or arceb-elf32-ld (EZChip) don't accept 87# --build-id w/o "-marclinux". Default arc-elf32-ld is OK 88ldflags-$(upto_gcc44) += -marclinux 89 90LIBGCC := $(shell $(CC) $(cflags-y) --print-libgcc-file-name) 91 92# Modules with short calls might break for calls into builtin-kernel 93KBUILD_CFLAGS_MODULE += -mlong-calls -mno-millicode 94 95# Finally dump eveything into kernel build system 96KBUILD_CFLAGS += $(cflags-y) 97KBUILD_AFLAGS += $(KBUILD_CFLAGS) 98LDFLAGS += $(ldflags-y) 99 100head-y := arch/arc/kernel/head.o 101 102# See arch/arc/Kbuild for content of core part of the kernel 103core-y += arch/arc/ 104 105# w/o this dtb won't embed into kernel binary 106core-y += arch/arc/boot/dts/ 107 108core-y += arch/arc/plat-sim/ 109core-$(CONFIG_ARC_PLAT_TB10X) += arch/arc/plat-tb10x/ 110core-$(CONFIG_ARC_PLAT_AXS10X) += arch/arc/plat-axs10x/ 111core-$(CONFIG_ARC_PLAT_EZNPS) += arch/arc/plat-eznps/ 112core-$(CONFIG_ARC_SOC_HSDK) += arch/arc/plat-hsdk/ 113 114ifdef CONFIG_ARC_PLAT_EZNPS 115KBUILD_CPPFLAGS += -I$(srctree)/arch/arc/plat-eznps/include 116endif 117 118drivers-$(CONFIG_OPROFILE) += arch/arc/oprofile/ 119 120libs-y += arch/arc/lib/ $(LIBGCC) 121 122boot := arch/arc/boot 123 124#default target for make without any arguments. 125KBUILD_IMAGE := $(boot)/bootpImage 126 127all: bootpImage 128bootpImage: vmlinux 129 130boot_targets += uImage uImage.bin uImage.gz 131 132$(boot_targets): vmlinux 133 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 134 135%.dtb %.dtb.S %.dtb.o: scripts 136 $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@ 137 138dtbs: scripts 139 $(Q)$(MAKE) $(build)=$(boot)/dts 140 141archclean: 142 $(Q)$(MAKE) $(clean)=$(boot) 143 144# Hacks to enable final link due to absence of link-time branch relexation 145# and gcc choosing optimal(shorter) branches at -O3 146# 147# vineetg Feb 2010: -mlong-calls switched off for overall kernel build 148# However lib/decompress_inflate.o (.init.text) calls 149# zlib_inflate_workspacesize (.text) causing relocation errors. 150# Thus forcing all exten calls in this file to be long calls 151export CFLAGS_decompress_inflate.o = -mmedium-calls 152export CFLAGS_initramfs.o = -mmedium-calls 153ifdef CONFIG_SMP 154export CFLAGS_core.o = -mmedium-calls 155endif 156