# # 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) 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 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 # 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 # 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