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Diffstat (limited to 'kernel/arch/arc/Makefile')
| -rw-r--r-- | kernel/arch/arc/Makefile | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/kernel/arch/arc/Makefile b/kernel/arch/arc/Makefile new file mode 100644 index 000000000..db72fec0e --- /dev/null +++ b/kernel/arch/arc/Makefile @@ -0,0 +1,124 @@ +# +# 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 + +ifeq ($(CROSS_COMPILE),) +CROSS_COMPILE := arc-linux-uclibc- +endif + +KBUILD_DEFCONFIG := nsim_700_defconfig + +cflags-y += -mA7 -fno-common -pipe -fno-builtin -D__linux__ + +ifdef CONFIG_ARC_CURR_IN_REG +# For a global register defintion, make sure it gets passed to every file +# We had a customer reported bug where some code built in kernel was NOT using +# any kernel headers, and missing the r25 global register +# Can't do unconditionally because of recursive include issues +# due to <linux/thread_info.h> +LINUXINCLUDE += -include ${src}/arch/arc/include/asm/current.h +endif + +upto_gcc44 := $(call cc-ifversion, -le, 0404, y) +atleast_gcc44 := $(call cc-ifversion, -ge, 0404, y) +atleast_gcc48 := $(call cc-ifversion, -ge, 0408, y) + +cflags-$(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 + +# By default gcc 4.8 generates dwarf4 which kernel unwinder can't grok +ifeq ($(atleast_gcc48),y) +cflags-$(CONFIG_ARC_DW2_UNWIND) += -gdwarf-2 +endif + +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-$(CONFIG_CPU_BIG_ENDIAN) += -EB + +# STAR 9000518362: (fixed with binutils shipping with gcc 4.8) +# arc-linux-uclibc-ld (buildroot) or arceb-elf32-ld (EZChip) don't accept +# --build-id w/o "-marclinux". Default arc-elf32-ld is OK +ldflags-$(upto_gcc44) += -marclinux + +ifndef CONFIG_ARC_HAS_HW_MPY + cflags-y += -mno-mpy +endif + +LIBGCC := $(shell $(CC) $(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 += $(ldflags-y) + +head-y := arch/arc/kernel/head.o + +# See arch/arc/Kbuild for content of core part of the kernel +core-y += arch/arc/ + +# w/o this dtb won't embed into kernel binary +core-y += arch/arc/boot/dts/ + +core-$(CONFIG_ARC_PLAT_FPGA_LEGACY) += arch/arc/plat-arcfpga/ +core-$(CONFIG_ARC_PLAT_TB10X) += arch/arc/plat-tb10x/ + +drivers-$(CONFIG_OPROFILE) += arch/arc/oprofile/ + +libs-y += arch/arc/lib/ $(LIBGCC) + +boot := arch/arc/boot + +#default target for make without any arguements. +KBUILD_IMAGE := bootpImage + +all: $(KBUILD_IMAGE) +bootpImage: vmlinux + +boot_targets += uImage uImage.bin uImage.gz + +$(boot_targets): vmlinux + $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ + +%.dtb %.dtb.S %.dtb.o: scripts + $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@ + +dtbs: scripts + $(Q)$(MAKE) $(build)=$(boot)/dts dtbs + +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 +ifdef CONFIG_SMP +export CFLAGS_core.o = -mmedium-calls +endif |