projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| cfdbc2e1 VG |
1 | # |
| 2 | # Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) | |
| 3 | # | |
| 4 | # This program is free software; you can redistribute it and/or modify | |
| 5 | # it under the terms of the GNU General Public License version 2 as | |
| 6 | # published by the Free Software Foundation. | |
| 7 | # | |
| 8 | ||
| 9 | UTS_MACHINE := arc | |
| 10 | ||
| 11 | KBUILD_DEFCONFIG := fpga_defconfig | |
| 12 | ||
| 13 | # For ARC FPGA Platforms | |
| 14 | platform-$(CONFIG_ARC_PLAT_FPGA_LEGACY) := arcfpga | |
| 15 | #New platform adds here | |
| 16 | ||
| 17 | PLATFORM := $(platform-y) | |
| 18 | export PLATFORM | |
| 19 | ||
| 20 | cflags-y += -Iarch/arc/plat-$(PLATFORM)/include | |
| 21 | cflags-y += -mA7 -fno-common -pipe -fno-builtin -D__linux__ | |
| 22 | ||
| 23 | atleast_gcc44 := $(call cc-ifversion, -gt, 0402, y) | |
| 24 | cflags-$(atleast_gcc44) += -fsection-anchors | |
| 25 | ||
| 26 | cflags-$(CONFIG_ARC_HAS_LLSC) += -mlock | |
| 27 | cflags-$(CONFIG_ARC_HAS_SWAPE) += -mswape | |
| 28 | cflags-$(CONFIG_ARC_HAS_RTSC) += -mrtsc | |
| 29 | cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables | |
| 30 | ||
| 31 | ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE | |
| 32 | # Generic build system uses -O2, we want -O3 | |
| 33 | cflags-y += -O3 | |
| 34 | endif | |
| 35 | ||
| 36 | # small data is default for elf32 tool-chain. If not usable, disable it | |
| 37 | # This also allows repurposing GP as scratch reg to gcc reg allocator | |
| 38 | disable_small_data := y | |
| 39 | cflags-$(disable_small_data) += -mno-sdata -fcall-used-gp | |
| 40 | ||
| 41 | cflags-$(CONFIG_CPU_BIG_ENDIAN) += -mbig-endian | |
| 42 | ldflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB | |
| 43 | ||
| 44 | # STAR 9000518362: | |
| 45 | # arc-linux-uclibc-ld (buildroot) or arceb-elf32-ld (EZChip) don't accept | |
| 46 | # --build-id w/o "-marclinux". | |
| 47 | # Default arc-elf32-ld is OK | |
| 48 | ldflags-y += -marclinux | |
| 49 | ||
| 50 | ARC_LIBGCC := -mA7 | |
| 51 | cflags-$(CONFIG_ARC_HAS_HW_MPY) += -multcost=16 | |
| 52 | ||
| 53 | ifndef CONFIG_ARC_HAS_HW_MPY | |
| 54 | cflags-y += -mno-mpy | |
| 55 | ||
| 56 | # newlib for ARC700 assumes MPY to be always present, which is generally true | |
| 57 | # However, if someone really doesn't want MPY, we need to use the 600 ver | |
| 58 | # which coupled with -mno-mpy will use mpy emulation | |
| 59 | # With gcc 4.4.7, -mno-mpy is enough to make any other related adjustments, | |
| 60 | # e.g. increased cost of MPY. With gcc 4.2.1 this had to be explicitly hinted | |
| 61 | ||
| 62 | ARC_LIBGCC := -marc600 | |
| 63 | ifneq ($(atleast_gcc44),y) | |
| 64 | cflags-y += -multcost=30 | |
| 65 | endif | |
| 66 | endif | |
| 67 | ||
| 68 | LIBGCC := $(shell $(CC) $(ARC_LIBGCC) $(cflags-y) --print-libgcc-file-name) | |
| 69 | ||
| 70 | # Modules with short calls might break for calls into builtin-kernel | |
| 71 | KBUILD_CFLAGS_MODULE += -mlong-calls | |
| 72 | ||
| 73 | # Finally dump eveything into kernel build system | |
| 74 | KBUILD_CFLAGS += $(cflags-y) | |
| 75 | KBUILD_AFLAGS += $(KBUILD_CFLAGS) | |
| 76 | LDFLAGS += $(ldflags-y) | |
| 77 | ||
| 78 | # Needed for Linker script preprocessing | |
| 79 | KBUILD_CPPFLAGS += -Iarch/arc/plat-$(PLATFORM)/include | |
| 80 | ||
| 81 | head-y := arch/arc/kernel/head.o | |
| 82 | ||
| 83 | # See arch/arc/Kbuild for content of core part of the kernel | |
| 84 | core-y += arch/arc/ | |
| 85 | ||
| 86 | # w/o this ifneq, make ARCH=arc clean was crapping out | |
| 87 | ifneq ($(platform-y),) | |
| 88 | core-y += arch/arc/plat-$(PLATFORM)/ | |
| 89 | endif | |
| 90 | ||
| 91 | libs-y += arch/arc/lib/ $(LIBGCC) | |
| 92 | ||
| 93 | #default target for make without any arguements. | |
| 94 | KBUILD_IMAGE := bootpImage | |
| 95 | ||
| 96 | all: $(KBUILD_IMAGE) | |
| 97 | boot := arch/arc/boot | |
| 98 | ||
| 99 | bootpImage: vmlinux | |
| 100 | ||
| 101 | uImage: vmlinux | |
| 102 | $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ | |
| 103 | ||
| 104 | archclean: | |
| 105 | $(Q)$(MAKE) $(clean)=$(boot) | |
| 106 | ||
| 107 | # Hacks to enable final link due to absence of link-time branch relexation | |
| 108 | # and gcc choosing optimal(shorter) branches at -O3 | |
| 109 | # | |
| 110 | # vineetg Feb 2010: -mlong-calls switched off for overall kernel build | |
| 111 | # However lib/decompress_inflate.o (.init.text) calls | |
| 112 | # zlib_inflate_workspacesize (.text) causing relocation errors. | |
| 113 | # Thus forcing all exten calls in this file to be long calls | |
| 114 | export CFLAGS_decompress_inflate.o = -mmedium-calls | |
| 115 | export CFLAGS_initramfs.o = -mmedium-calls |