blob: db72fec0e160fc8e67fe17c5faf9c6ef54c8bcdb [file] [log] [blame]
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 Gupta5a45da02013-05-25 14:03:25 +053012CROSS_COMPILE := arc-linux-uclibc-
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 Guptacfdbc2e2013-01-18 15:12:20 +053017cflags-y += -mA7 -fno-common -pipe -fno-builtin -D__linux__
18
Vineet Gupta080c3742013-02-11 19:52:57 +053019ifdef CONFIG_ARC_CURR_IN_REG
20# For a global register defintion, make sure it gets passed to every file
21# We had a customer reported bug where some code built in kernel was NOT using
22# any kernel headers, and missing the r25 global register
Vineet Gupta82357032013-06-01 12:55:42 +053023# Can't do unconditionally because of recursive include issues
Vineet Gupta080c3742013-02-11 19:52:57 +053024# due to <linux/thread_info.h>
25LINUXINCLUDE += -include ${src}/arch/arc/include/asm/current.h
26endif
27
Vineet Gupta5a45da02013-05-25 14:03:25 +053028upto_gcc44 := $(call cc-ifversion, -le, 0404, y)
29atleast_gcc44 := $(call cc-ifversion, -ge, 0404, y)
30atleast_gcc48 := $(call cc-ifversion, -ge, 0408, y)
31
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053032cflags-$(atleast_gcc44) += -fsection-anchors
33
34cflags-$(CONFIG_ARC_HAS_LLSC) += -mlock
35cflags-$(CONFIG_ARC_HAS_SWAPE) += -mswape
36cflags-$(CONFIG_ARC_HAS_RTSC) += -mrtsc
37cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables
38
Vineet Gupta5a45da02013-05-25 14:03:25 +053039# By default gcc 4.8 generates dwarf4 which kernel unwinder can't grok
40ifeq ($(atleast_gcc48),y)
41cflags-$(CONFIG_ARC_DW2_UNWIND) += -gdwarf-2
42endif
43
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053044ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE
45# Generic build system uses -O2, we want -O3
46cflags-y += -O3
47endif
48
49# small data is default for elf32 tool-chain. If not usable, disable it
50# This also allows repurposing GP as scratch reg to gcc reg allocator
51disable_small_data := y
52cflags-$(disable_small_data) += -mno-sdata -fcall-used-gp
53
54cflags-$(CONFIG_CPU_BIG_ENDIAN) += -mbig-endian
55ldflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB
56
Vineet Gupta5a45da02013-05-25 14:03:25 +053057# STAR 9000518362: (fixed with binutils shipping with gcc 4.8)
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053058# arc-linux-uclibc-ld (buildroot) or arceb-elf32-ld (EZChip) don't accept
Vineet Gupta5a45da02013-05-25 14:03:25 +053059# --build-id w/o "-marclinux". Default arc-elf32-ld is OK
60ldflags-$(upto_gcc44) += -marclinux
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053061
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053062ifndef CONFIG_ARC_HAS_HW_MPY
63 cflags-y += -mno-mpy
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053064endif
65
Vineet Gupta68d8fee2014-08-07 16:24:47 -070066LIBGCC := $(shell $(CC) $(cflags-y) --print-libgcc-file-name)
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053067
68# Modules with short calls might break for calls into builtin-kernel
69KBUILD_CFLAGS_MODULE += -mlong-calls
70
71# Finally dump eveything into kernel build system
72KBUILD_CFLAGS += $(cflags-y)
73KBUILD_AFLAGS += $(KBUILD_CFLAGS)
74LDFLAGS += $(ldflags-y)
75
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053076head-y := arch/arc/kernel/head.o
77
78# See arch/arc/Kbuild for content of core part of the kernel
79core-y += arch/arc/
80
Vineet Gupta999159a2013-01-22 17:00:52 +053081# w/o this dtb won't embed into kernel binary
82core-y += arch/arc/boot/dts/
83
Vineet Guptae97ff122013-01-18 15:12:26 +053084core-$(CONFIG_ARC_PLAT_FPGA_LEGACY) += arch/arc/plat-arcfpga/
Christian Ruppert072eb692013-04-12 08:40:59 +020085core-$(CONFIG_ARC_PLAT_TB10X) += arch/arc/plat-tb10x/
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053086
Vineet Gupta769bc1f2013-01-22 17:02:38 +053087drivers-$(CONFIG_OPROFILE) += arch/arc/oprofile/
88
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053089libs-y += arch/arc/lib/ $(LIBGCC)
90
Vineet Guptafb0990b2013-03-22 19:48:01 +053091boot := arch/arc/boot
92
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053093#default target for make without any arguements.
Vineet Guptafb0990b2013-03-22 19:48:01 +053094KBUILD_IMAGE := bootpImage
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053095
96all: $(KBUILD_IMAGE)
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053097bootpImage: vmlinux
98
Vineet Gupta104058e2013-03-22 22:04:27 +053099boot_targets += uImage uImage.bin uImage.gz
100
101$(boot_targets): vmlinux
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530102 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
103
Vineet Gupta999159a2013-01-22 17:00:52 +0530104%.dtb %.dtb.S %.dtb.o: scripts
105 $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@
106
107dtbs: scripts
108 $(Q)$(MAKE) $(build)=$(boot)/dts dtbs
109
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530110archclean:
111 $(Q)$(MAKE) $(clean)=$(boot)
112
113# Hacks to enable final link due to absence of link-time branch relexation
114# and gcc choosing optimal(shorter) branches at -O3
115#
116# vineetg Feb 2010: -mlong-calls switched off for overall kernel build
117# However lib/decompress_inflate.o (.init.text) calls
118# zlib_inflate_workspacesize (.text) causing relocation errors.
119# Thus forcing all exten calls in this file to be long calls
120export CFLAGS_decompress_inflate.o = -mmedium-calls
121export CFLAGS_initramfs.o = -mmedium-calls
Vineet Gupta41195d22013-01-18 15:12:23 +0530122ifdef CONFIG_SMP
123export CFLAGS_core.o = -mmedium-calls
124endif