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Vineet Guptacfdbc2e2013-01-18 15:12:20 +05301#
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
9UTS_MACHINE := arc
10
Vineet Guptaaf4c3ae2013-03-21 12:22:06 +053011ifeq ($(CROSS_COMPILE),)
Vineet Gupta7c42eaf2015-05-18 12:50:02 +053012CROSS_COMPILE := arc-linux-
Vineet Guptaaf4c3ae2013-03-21 12:22:06 +053013endif
14
Vineet Gupta7a70bf72014-12-12 10:27:50 +053015KBUILD_DEFCONFIG := nsim_700_defconfig
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053016
Vineet Gupta1f6ccff2013-05-13 18:30:41 +053017cflags-y += -fno-common -pipe -fno-builtin -D__linux__
Vineet Gupta40b8ad82015-06-28 20:22:01 +053018cflags-$(CONFIG_ISA_ARCOMPACT) += -mA7
19cflags-$(CONFIG_ISA_ARCV2) += -mcpu=archs
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053020
Vineet Gupta080c3742013-02-11 19:52:57 +053021ifdef CONFIG_ARC_CURR_IN_REG
22# For a global register defintion, make sure it gets passed to every file
23# We had a customer reported bug where some code built in kernel was NOT using
24# any kernel headers, and missing the r25 global register
Vineet Gupta82357032013-06-01 12:55:42 +053025# Can't do unconditionally because of recursive include issues
Vineet Gupta080c3742013-02-11 19:52:57 +053026# due to <linux/thread_info.h>
27LINUXINCLUDE += -include ${src}/arch/arc/include/asm/current.h
28endif
29
Vineet Gupta5a45da02013-05-25 14:03:25 +053030upto_gcc44 := $(call cc-ifversion, -le, 0404, y)
31atleast_gcc44 := $(call cc-ifversion, -ge, 0404, y)
32atleast_gcc48 := $(call cc-ifversion, -ge, 0408, y)
33
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053034cflags-$(atleast_gcc44) += -fsection-anchors
35
36cflags-$(CONFIG_ARC_HAS_LLSC) += -mlock
37cflags-$(CONFIG_ARC_HAS_SWAPE) += -mswape
Vineet Gupta565a9b42015-03-07 17:06:09 +053038
Alexey Brodkind05a76a2015-07-16 21:45:38 +030039ifdef CONFIG_ISA_ARCV2
40
Vineet Gupta1f6ccff2013-05-13 18:30:41 +053041ifndef CONFIG_ARC_HAS_LL64
Alexey Brodkind05a76a2015-07-16 21:45:38 +030042cflags-y += -mno-ll64
43endif
44
45ifndef CONFIG_ARC_HAS_DIV_REM
46cflags-y += -mno-div-rem
47endif
48
Vineet Gupta1f6ccff2013-05-13 18:30:41 +053049endif
50
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053051cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables
52
Vineet Gupta5a45da02013-05-25 14:03:25 +053053# By default gcc 4.8 generates dwarf4 which kernel unwinder can't grok
54ifeq ($(atleast_gcc48),y)
55cflags-$(CONFIG_ARC_DW2_UNWIND) += -gdwarf-2
56endif
57
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053058ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE
59# Generic build system uses -O2, we want -O3
Vineet Gupta97709062015-06-18 13:54:01 +053060# Note: No need to add to cflags-y as that happens anyways
61ARCH_CFLAGS += -O3
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053062endif
63
64# small data is default for elf32 tool-chain. If not usable, disable it
65# This also allows repurposing GP as scratch reg to gcc reg allocator
66disable_small_data := y
67cflags-$(disable_small_data) += -mno-sdata -fcall-used-gp
68
69cflags-$(CONFIG_CPU_BIG_ENDIAN) += -mbig-endian
70ldflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB
71
Vineet Gupta5a45da02013-05-25 14:03:25 +053072# STAR 9000518362: (fixed with binutils shipping with gcc 4.8)
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053073# arc-linux-uclibc-ld (buildroot) or arceb-elf32-ld (EZChip) don't accept
Vineet Gupta5a45da02013-05-25 14:03:25 +053074# --build-id w/o "-marclinux". Default arc-elf32-ld is OK
75ldflags-$(upto_gcc44) += -marclinux
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053076
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053077ifndef CONFIG_ARC_HAS_HW_MPY
78 cflags-y += -mno-mpy
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053079endif
80
Vineet Gupta68d8fee2014-08-07 16:24:47 -070081LIBGCC := $(shell $(CC) $(cflags-y) --print-libgcc-file-name)
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053082
83# Modules with short calls might break for calls into builtin-kernel
84KBUILD_CFLAGS_MODULE += -mlong-calls
85
86# Finally dump eveything into kernel build system
87KBUILD_CFLAGS += $(cflags-y)
88KBUILD_AFLAGS += $(KBUILD_CFLAGS)
89LDFLAGS += $(ldflags-y)
90
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053091head-y := arch/arc/kernel/head.o
92
93# See arch/arc/Kbuild for content of core part of the kernel
94core-y += arch/arc/
95
Vineet Gupta999159a2013-01-22 17:00:52 +053096# w/o this dtb won't embed into kernel binary
97core-y += arch/arc/boot/dts/
98
Vineet Guptafd155792015-02-20 19:12:18 +053099core-$(CONFIG_ARC_PLAT_SIM) += arch/arc/plat-sim/
100core-$(CONFIG_ARC_PLAT_TB10X) += arch/arc/plat-tb10x/
Alexey Brodkin556cc1c2014-01-27 14:51:34 +0100101core-$(CONFIG_ARC_PLAT_AXS10X) += arch/arc/plat-axs10x/
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530102
Vineet Gupta769bc1f2013-01-22 17:02:38 +0530103drivers-$(CONFIG_OPROFILE) += arch/arc/oprofile/
104
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530105libs-y += arch/arc/lib/ $(LIBGCC)
106
Vineet Guptafb0990b2013-03-22 19:48:01 +0530107boot := arch/arc/boot
108
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530109#default target for make without any arguements.
Vineet Guptafb0990b2013-03-22 19:48:01 +0530110KBUILD_IMAGE := bootpImage
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530111
112all: $(KBUILD_IMAGE)
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530113bootpImage: vmlinux
114
Vineet Gupta104058e2013-03-22 22:04:27 +0530115boot_targets += uImage uImage.bin uImage.gz
116
117$(boot_targets): vmlinux
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530118 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
119
Vineet Gupta999159a2013-01-22 17:00:52 +0530120%.dtb %.dtb.S %.dtb.o: scripts
121 $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@
122
123dtbs: scripts
124 $(Q)$(MAKE) $(build)=$(boot)/dts dtbs
125
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530126archclean:
127 $(Q)$(MAKE) $(clean)=$(boot)
128
129# Hacks to enable final link due to absence of link-time branch relexation
130# and gcc choosing optimal(shorter) branches at -O3
131#
132# vineetg Feb 2010: -mlong-calls switched off for overall kernel build
133# However lib/decompress_inflate.o (.init.text) calls
134# zlib_inflate_workspacesize (.text) causing relocation errors.
135# Thus forcing all exten calls in this file to be long calls
136export CFLAGS_decompress_inflate.o = -mmedium-calls
137export CFLAGS_initramfs.o = -mmedium-calls
Vineet Gupta41195d22013-01-18 15:12:23 +0530138ifdef CONFIG_SMP
139export CFLAGS_core.o = -mmedium-calls
140endif