diff options
Diffstat (limited to 'arch/arc/Makefile')
| -rw-r--r-- | arch/arc/Makefile | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/arch/arc/Makefile b/arch/arc/Makefile new file mode 100644 index 0000000..4d52a3b --- /dev/null +++ b/arch/arc/Makefile @@ -0,0 +1,115 @@ +# +# Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License version 2 as +# published by the Free Software Foundation. +# + +UTS_MACHINE := arc + +KBUILD_DEFCONFIG := fpga_defconfig + +# For ARC FPGA Platforms +platform-$(CONFIG_ARC_PLAT_FPGA_LEGACY) := arcfpga +#New platform adds here + +PLATFORM := $(platform-y) +export PLATFORM + +cflags-y += -Iarch/arc/plat-$(PLATFORM)/include +cflags-y += -mA7 -fno-common -pipe -fno-builtin -D__linux__ + +atleast_gcc44 := $(call cc-ifversion, -gt, 0402, y) +cflags-$(atleast_gcc44) += -fsection-anchors + +cflags-$(CONFIG_ARC_HAS_LLSC) += -mlock +cflags-$(CONFIG_ARC_HAS_SWAPE) += -mswape +cflags-$(CONFIG_ARC_HAS_RTSC) += -mrtsc +cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables + +ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE +# Generic build system uses -O2, we want -O3 +cflags-y += -O3 +endif + +# small data is default for elf32 tool-chain. If not usable, disable it +# This also allows repurposing GP as scratch reg to gcc reg allocator +disable_small_data := y +cflags-$(disable_small_data) += -mno-sdata -fcall-used-gp + +cflags-$(CONFIG_CPU_BIG_ENDIAN) += -mbig-endian +ldflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB + +# STAR 9000518362: +# arc-linux-uclibc-ld (buildroot) or arceb-elf32-ld (EZChip) don't accept +# --build-id w/o "-marclinux". +# Default arc-elf32-ld is OK +ldflags-y += -marclinux + +ARC_LIBGCC := -mA7 +cflags-$(CONFIG_ARC_HAS_HW_MPY) += -multcost=16 + +ifndef CONFIG_ARC_HAS_HW_MPY + cflags-y += -mno-mpy + +# newlib for ARC700 assumes MPY to be always present, which is generally true +# However, if someone really doesn't want MPY, we need to use the 600 ver +# which coupled with -mno-mpy will use mpy emulation +# With gcc 4.4.7, -mno-mpy is enough to make any other related adjustments, +# e.g. increased cost of MPY. With gcc 4.2.1 this had to be explicitly hinted + + ARC_LIBGCC := -marc600 + ifneq ($(atleast_gcc44),y) + cflags-y += -multcost=30 + endif +endif + +LIBGCC := $(shell $(CC) $(ARC_LIBGCC) $(cflags-y) --print-libgcc-file-name) + +# Modules with short calls might break for calls into builtin-kernel +KBUILD_CFLAGS_MODULE += -mlong-calls + +# Finally dump eveything into kernel build system +KBUILD_CFLAGS += $(cflags-y) +KBUILD_AFLAGS += $(KBUILD_CFLAGS) +LDFLAGS += $(ldflags-y) + +# Needed for Linker script preprocessing +KBUILD_CPPFLAGS += -Iarch/arc/plat-$(PLATFORM)/include + +head-y := arch/arc/kernel/head.o + +# See arch/arc/Kbuild for content of core part of the kernel +core-y += arch/arc/ + +# w/o this ifneq, make ARCH=arc clean was crapping out +ifneq ($(platform-y),) +core-y += arch/arc/plat-$(PLATFORM)/ +endif + +libs-y += arch/arc/lib/ $(LIBGCC) + +#default target for make without any arguements. +KBUILD_IMAGE := bootpImage + +all: $(KBUILD_IMAGE) +boot := arch/arc/boot + +bootpImage: vmlinux + +uImage: vmlinux + $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ + +archclean: + $(Q)$(MAKE) $(clean)=$(boot) + +# Hacks to enable final link due to absence of link-time branch relexation +# and gcc choosing optimal(shorter) branches at -O3 +# +# vineetg Feb 2010: -mlong-calls switched off for overall kernel build +# However lib/decompress_inflate.o (.init.text) calls +# zlib_inflate_workspacesize (.text) causing relocation errors. +# Thus forcing all exten calls in this file to be long calls +export CFLAGS_decompress_inflate.o = -mmedium-calls +export CFLAGS_initramfs.o = -mmedium-calls |