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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
Vineet Guptaaf4c3ae2013-03-21 12:22:06 +05309ifeq ($(CROSS_COMPILE),)
Vineet Gupta89a26922016-03-11 12:47:58 +053010ifndef CONFIG_CPU_BIG_ENDIAN
Vineet Gupta7c42eaf2015-05-18 12:50:02 +053011CROSS_COMPILE := arc-linux-
Vineet Gupta89a26922016-03-11 12:47:58 +053012else
13CROSS_COMPILE := arceb-linux-
14endif
Vineet Guptaaf4c3ae2013-03-21 12:22:06 +053015endif
16
Vineet Gupta7a70bf72014-12-12 10:27:50 +053017KBUILD_DEFCONFIG := nsim_700_defconfig
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053018
Vineet Gupta1f6ccff2013-05-13 18:30:41 +053019cflags-y += -fno-common -pipe -fno-builtin -D__linux__
Vineet Gupta40b8ad82015-06-28 20:22:01 +053020cflags-$(CONFIG_ISA_ARCOMPACT) += -mA7
21cflags-$(CONFIG_ISA_ARCV2) += -mcpu=archs
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053022
Vineet Gupta20d78032016-02-25 22:04:38 +053023is_700 = $(shell $(CC) -dM -E - < /dev/null | grep -q "ARC700" && echo 1 || echo 0)
24
25ifdef CONFIG_ISA_ARCOMPACT
26ifeq ($(is_700), 0)
27 $(error Toolchain not configured for ARCompact builds)
28endif
29endif
30
31ifdef CONFIG_ISA_ARCV2
32ifeq ($(is_700), 1)
33 $(error Toolchain not configured for ARCv2 builds)
34endif
35endif
36
Vineet Gupta080c3742013-02-11 19:52:57 +053037ifdef CONFIG_ARC_CURR_IN_REG
38# For a global register defintion, make sure it gets passed to every file
39# We had a customer reported bug where some code built in kernel was NOT using
40# any kernel headers, and missing the r25 global register
Vineet Gupta8235703e2013-06-01 12:55:42 +053041# Can't do unconditionally because of recursive include issues
Vineet Gupta080c3742013-02-11 19:52:57 +053042# due to <linux/thread_info.h>
43LINUXINCLUDE += -include ${src}/arch/arc/include/asm/current.h
44endif
45
Vineet Gupta5a45da02013-05-25 14:03:25 +053046upto_gcc44 := $(call cc-ifversion, -le, 0404, y)
47atleast_gcc44 := $(call cc-ifversion, -ge, 0404, y)
Vineet Gupta5a45da02013-05-25 14:03:25 +053048
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053049cflags-$(atleast_gcc44) += -fsection-anchors
50
Vineet Gupta76a08402016-11-08 08:47:14 -080051cflags-$(CONFIG_ARC_HAS_LLSC) += -mlock
52cflags-$(CONFIG_ARC_HAS_SWAPE) += -mswape
53
Alexey Brodkind05a76a2015-07-16 21:45:38 +030054ifdef CONFIG_ISA_ARCV2
55
Vineet Gupta1f6ccff2013-05-13 18:30:41 +053056ifndef CONFIG_ARC_HAS_LL64
Alexey Brodkind05a76a2015-07-16 21:45:38 +030057cflags-y += -mno-ll64
58endif
59
60ifndef CONFIG_ARC_HAS_DIV_REM
61cflags-y += -mno-div-rem
62endif
63
Vineet Gupta1f6ccff2013-05-13 18:30:41 +053064endif
65
Vineet Gupta5a205a32016-09-16 17:23:26 -070066cfi := $(call as-instr,.cfi_startproc\n.cfi_endproc,-DARC_DW2_UNWIND_AS_CFI)
67cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables $(cfi)
Vineet Gupta6716dbb2013-06-24 21:22:06 +053068
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053069ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE
70# Generic build system uses -O2, we want -O3
Vineet Gupta97709062015-06-18 13:54:01 +053071# Note: No need to add to cflags-y as that happens anyways
Arnd Bergmanna76bcf52016-11-10 17:44:44 +010072#
73# Disable the false maybe-uninitialized warings gcc spits out at -O3
74ARCH_CFLAGS += -O3 $(call cc-disable-warning,maybe-uninitialized,)
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053075endif
76
77# small data is default for elf32 tool-chain. If not usable, disable it
78# This also allows repurposing GP as scratch reg to gcc reg allocator
79disable_small_data := y
80cflags-$(disable_small_data) += -mno-sdata -fcall-used-gp
81
82cflags-$(CONFIG_CPU_BIG_ENDIAN) += -mbig-endian
83ldflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB
84
Vineet Gupta5a45da02013-05-25 14:03:25 +053085# STAR 9000518362: (fixed with binutils shipping with gcc 4.8)
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053086# arc-linux-uclibc-ld (buildroot) or arceb-elf32-ld (EZChip) don't accept
Vineet Gupta5a45da02013-05-25 14:03:25 +053087# --build-id w/o "-marclinux". Default arc-elf32-ld is OK
88ldflags-$(upto_gcc44) += -marclinux
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053089
Vineet Gupta68d8fee2014-08-07 16:24:47 -070090LIBGCC := $(shell $(CC) $(cflags-y) --print-libgcc-file-name)
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053091
92# Modules with short calls might break for calls into builtin-kernel
Vineet Gupta07fd7d42015-12-21 12:38:01 +053093KBUILD_CFLAGS_MODULE += -mlong-calls -mno-millicode
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053094
95# Finally dump eveything into kernel build system
96KBUILD_CFLAGS += $(cflags-y)
97KBUILD_AFLAGS += $(KBUILD_CFLAGS)
98LDFLAGS += $(ldflags-y)
99
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530100head-y := arch/arc/kernel/head.o
101
102# See arch/arc/Kbuild for content of core part of the kernel
103core-y += arch/arc/
104
Vineet Gupta999159a2013-01-22 17:00:52 +0530105# w/o this dtb won't embed into kernel binary
106core-y += arch/arc/boot/dts/
107
Vineet Gupta33460f82017-07-28 16:53:50 +0530108core-y += arch/arc/plat-sim/
Vineet Guptafd155792015-02-20 19:12:18 +0530109core-$(CONFIG_ARC_PLAT_TB10X) += arch/arc/plat-tb10x/
Alexey Brodkin556cc1c2014-01-27 14:51:34 +0100110core-$(CONFIG_ARC_PLAT_AXS10X) += arch/arc/plat-axs10x/
Noam Camus966657892015-10-16 16:52:43 +0300111core-$(CONFIG_ARC_PLAT_EZNPS) += arch/arc/plat-eznps/
Alexey Brodkina518d632017-08-15 21:13:55 +0300112core-$(CONFIG_ARC_SOC_HSDK) += arch/arc/plat-hsdk/
Noam Camus966657892015-10-16 16:52:43 +0300113
114ifdef CONFIG_ARC_PLAT_EZNPS
115KBUILD_CPPFLAGS += -I$(srctree)/arch/arc/plat-eznps/include
116endif
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530117
Vineet Gupta769bc1f2013-01-22 17:02:38 +0530118drivers-$(CONFIG_OPROFILE) += arch/arc/oprofile/
119
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530120libs-y += arch/arc/lib/ $(LIBGCC)
121
Vineet Guptafb0990b2013-03-22 19:48:01 +0530122boot := arch/arc/boot
123
Andrea Gelmini25474762016-05-21 13:45:35 +0200124#default target for make without any arguments.
Michal Marek5e40f0f2016-11-22 22:34:31 +0100125KBUILD_IMAGE := $(boot)/bootpImage
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530126
Michal Marek5e40f0f2016-11-22 22:34:31 +0100127all: bootpImage
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530128bootpImage: vmlinux
129
Vineet Gupta104058e2013-03-22 22:04:27 +0530130boot_targets += uImage uImage.bin uImage.gz
131
132$(boot_targets): vmlinux
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530133 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
134
Vineet Gupta999159a2013-01-22 17:00:52 +0530135%.dtb %.dtb.S %.dtb.o: scripts
136 $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@
137
138dtbs: scripts
Rob Herring10375cc2015-10-08 10:10:53 -0500139 $(Q)$(MAKE) $(build)=$(boot)/dts
Vineet Gupta999159a2013-01-22 17:00:52 +0530140
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530141archclean:
142 $(Q)$(MAKE) $(clean)=$(boot)
143
144# Hacks to enable final link due to absence of link-time branch relexation
145# and gcc choosing optimal(shorter) branches at -O3
146#
147# vineetg Feb 2010: -mlong-calls switched off for overall kernel build
148# However lib/decompress_inflate.o (.init.text) calls
149# zlib_inflate_workspacesize (.text) causing relocation errors.
150# Thus forcing all exten calls in this file to be long calls
151export CFLAGS_decompress_inflate.o = -mmedium-calls
152export CFLAGS_initramfs.o = -mmedium-calls
Vineet Gupta41195d22013-01-18 15:12:23 +0530153ifdef CONFIG_SMP
154export CFLAGS_core.o = -mmedium-calls
155endif