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 11ifeq ($(CROSS_COMPILE),) 12ifndef CONFIG_CPU_BIG_ENDIAN 13CROSS_COMPILE := arc-linux- 14else 15CROSS_COMPILE := arceb-linux- 16endif 17endif 18 19KBUILD_DEFCONFIG := nsim_700_defconfig 20 21cflags-y += -fno-common -pipe -fno-builtin -D__linux__ 22cflags-$(CONFIG_ISA_ARCOMPACT) += -mA7 23cflags-$(CONFIG_ISA_ARCV2) += -mcpu=archs 24 25is_700 = $(shell $(CC) -dM -E - < /dev/null | grep -q "ARC700" && echo 1 || echo 0) 26 27ifdef CONFIG_ISA_ARCOMPACT 28ifeq ($(is_700), 0) 29 $(error Toolchain not configured for ARCompact builds) 30endif 31endif 32 33ifdef CONFIG_ISA_ARCV2 34ifeq ($(is_700), 1) 35 $(error Toolchain not configured for ARCv2 builds) 36endif 37endif 38 39ifdef CONFIG_ARC_CURR_IN_REG 40# For a global register defintion, make sure it gets passed to every file 41# We had a customer reported bug where some code built in kernel was NOT using 42# any kernel headers, and missing the r25 global register 43# Can't do unconditionally because of recursive include issues 44# due to <linux/thread_info.h> 45LINUXINCLUDE += -include ${src}/arch/arc/include/asm/current.h 46endif 47 48upto_gcc44 := $(call cc-ifversion, -le, 0404, y) 49atleast_gcc44 := $(call cc-ifversion, -ge, 0404, y) 50 51cflags-$(atleast_gcc44) += -fsection-anchors 52 53ifdef CONFIG_ISA_ARCV2 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 $(cfi) 67 68ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE 69# Generic build system uses -O2, we want -O3 70# Note: No need to add to cflags-y as that happens anyways 71ARCH_CFLAGS += -O3 72endif 73 74# small data is default for elf32 tool-chain. If not usable, disable it 75# This also allows repurposing GP as scratch reg to gcc reg allocator 76disable_small_data := y 77cflags-$(disable_small_data) += -mno-sdata -fcall-used-gp 78 79cflags-$(CONFIG_CPU_BIG_ENDIAN) += -mbig-endian 80ldflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB 81 82# STAR 9000518362: (fixed with binutils shipping with gcc 4.8) 83# arc-linux-uclibc-ld (buildroot) or arceb-elf32-ld (EZChip) don't accept 84# --build-id w/o "-marclinux". Default arc-elf32-ld is OK 85ldflags-$(upto_gcc44) += -marclinux 86 87LIBGCC := $(shell $(CC) $(cflags-y) --print-libgcc-file-name) 88 89# Modules with short calls might break for calls into builtin-kernel 90KBUILD_CFLAGS_MODULE += -mlong-calls -mno-millicode 91 92# Finally dump eveything into kernel build system 93KBUILD_CFLAGS += $(cflags-y) 94KBUILD_AFLAGS += $(KBUILD_CFLAGS) 95LDFLAGS += $(ldflags-y) 96 97head-y := arch/arc/kernel/head.o 98 99# See arch/arc/Kbuild for content of core part of the kernel 100core-y += arch/arc/ 101 102# w/o this dtb won't embed into kernel binary 103core-y += arch/arc/boot/dts/ 104 105core-$(CONFIG_ARC_PLAT_SIM) += arch/arc/plat-sim/ 106core-$(CONFIG_ARC_PLAT_TB10X) += arch/arc/plat-tb10x/ 107core-$(CONFIG_ARC_PLAT_AXS10X) += arch/arc/plat-axs10x/ 108core-$(CONFIG_ARC_PLAT_EZNPS) += arch/arc/plat-eznps/ 109 110ifdef CONFIG_ARC_PLAT_EZNPS 111KBUILD_CPPFLAGS += -I$(srctree)/arch/arc/plat-eznps/include 112endif 113 114drivers-$(CONFIG_OPROFILE) += arch/arc/oprofile/ 115 116libs-y += arch/arc/lib/ $(LIBGCC) 117 118boot := arch/arc/boot 119 120#default target for make without any arguments. 121KBUILD_IMAGE := bootpImage 122 123all: $(KBUILD_IMAGE) 124bootpImage: vmlinux 125 126boot_targets += uImage uImage.bin uImage.gz 127 128$(boot_targets): vmlinux 129 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 130 131%.dtb %.dtb.S %.dtb.o: scripts 132 $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@ 133 134dtbs: scripts 135 $(Q)$(MAKE) $(build)=$(boot)/dts 136 137archclean: 138 $(Q)$(MAKE) $(clean)=$(boot) 139 140# Hacks to enable final link due to absence of link-time branch relexation 141# and gcc choosing optimal(shorter) branches at -O3 142# 143# vineetg Feb 2010: -mlong-calls switched off for overall kernel build 144# However lib/decompress_inflate.o (.init.text) calls 145# zlib_inflate_workspacesize (.text) causing relocation errors. 146# Thus forcing all exten calls in this file to be long calls 147export CFLAGS_decompress_inflate.o = -mmedium-calls 148export CFLAGS_initramfs.o = -mmedium-calls 149ifdef CONFIG_SMP 150export CFLAGS_core.o = -mmedium-calls 151endif 152