| # | |
| # 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-elf32- | |
| endif | |
| KBUILD_DEFCONFIG := fpga_defconfig | |
| cflags-y += -mA7 -fno-common -pipe -fno-builtin -D__linux__ | |
| LINUXINCLUDE += -include ${src}/arch/arc/include/asm/defines.h | |
| 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 (like above) because of recursive include issues | |
| # due to <linux/thread_info.h> | |
| LINUXINCLUDE += -include ${src}/arch/arc/include/asm/current.h | |
| endif | |
| 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 += $(ldflags-y) | |
| head-y := arch/arc/kernel/head.o | |
| # See arch/arc/Kbuild for content of core part of the kernel | |
| core-y += arch/arc/ | |
| # w/o this dtb won't embed into kernel binary | |
| core-y += arch/arc/boot/dts/ | |
| core-$(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 |