| # |
| # 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 ($(CROSS_COMPILE),) |
| ifndef CONFIG_CPU_BIG_ENDIAN |
| CROSS_COMPILE := arc-linux- |
| else |
| CROSS_COMPILE := arceb-linux- |
| endif |
| endif |
| |
| KBUILD_DEFCONFIG := nsim_700_defconfig |
| |
| cflags-y += -fno-common -pipe -fno-builtin -D__linux__ |
| cflags-$(CONFIG_ISA_ARCOMPACT) += -mA7 |
| cflags-$(CONFIG_ISA_ARCV2) += -mcpu=archs |
| |
| is_700 = $(shell $(CC) -dM -E - < /dev/null | grep -q "ARC700" && echo 1 || echo 0) |
| |
| ifdef CONFIG_ISA_ARCOMPACT |
| ifeq ($(is_700), 0) |
| $(error Toolchain not configured for ARCompact builds) |
| endif |
| endif |
| |
| ifdef CONFIG_ISA_ARCV2 |
| ifeq ($(is_700), 1) |
| $(error Toolchain not configured for ARCv2 builds) |
| endif |
| endif |
| |
| 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 := $(call cc-ifversion, -ge, 0404, y) |
| |
| cflags-$(atleast_gcc44) += -fsection-anchors |
| |
| ifdef CONFIG_ISA_ARCV2 |
| |
| ifndef CONFIG_ARC_HAS_LL64 |
| cflags-y += -mno-ll64 |
| endif |
| |
| ifndef CONFIG_ARC_HAS_DIV_REM |
| cflags-y += -mno-div-rem |
| endif |
| |
| endif |
| |
| cfi := $(call as-instr,.cfi_startproc\n.cfi_endproc,-DARC_DW2_UNWIND_AS_CFI) |
| cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables $(cfi) |
| |
| ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE |
| # Generic build system uses -O2, we want -O3 |
| # Note: No need to add to cflags-y as that happens anyways |
| ARCH_CFLAGS += -O3 |
| endif |
| |
| # small data is default for elf32 tool-chain. If not usable, disable it |
| # This also allows repurposing GP as scratch reg to gcc reg allocator |
| disable_small_data := y |
| cflags-$(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 |
| |
| 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 -mno-millicode |
| |
| # 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_SIM) += arch/arc/plat-sim/ |
| core-$(CONFIG_ARC_PLAT_TB10X) += arch/arc/plat-tb10x/ |
| core-$(CONFIG_ARC_PLAT_AXS10X) += arch/arc/plat-axs10x/ |
| core-$(CONFIG_ARC_PLAT_EZNPS) += arch/arc/plat-eznps/ |
| |
| ifdef CONFIG_ARC_PLAT_EZNPS |
| KBUILD_CPPFLAGS += -I$(srctree)/arch/arc/plat-eznps/include |
| endif |
| |
| drivers-$(CONFIG_OPROFILE) += arch/arc/oprofile/ |
| |
| libs-y += arch/arc/lib/ $(LIBGCC) |
| |
| boot := arch/arc/boot |
| |
| #default target for make without any arguments. |
| 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 |
| |
| 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 |
