xref: /openbmc/linux/arch/arc/Makefile (revision fa7f32422ea1ac276b45b96a540ed5981caaa61f)
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
9UTS_MACHINE := arc
10
11ifeq ($(CROSS_COMPILE),)
12ifndef CONFIG_CPU_BIG_ENDIAN
13CROSS_COMPILE := arc-linux-
14else
15CROSS_COMPILE := arceb-linux-
16endif
17endif
18
19KBUILD_DEFCONFIG := nsim_700_defconfig
20
21cflags-y	+= -fno-common -pipe -fno-builtin -D__linux__
22cflags-$(CONFIG_ISA_ARCOMPACT)	+= -mA7
23cflags-$(CONFIG_ISA_ARCV2)	+= -mcpu=archs
24
25is_700 = $(shell $(CC) -dM -E - < /dev/null | grep -q "ARC700" && echo 1 || echo 0)
26
27ifdef CONFIG_ISA_ARCOMPACT
28ifeq ($(is_700), 0)
29    $(error Toolchain not configured for ARCompact builds)
30endif
31endif
32
33ifdef CONFIG_ISA_ARCV2
34ifeq ($(is_700), 1)
35    $(error Toolchain not configured for ARCv2 builds)
36endif
37endif
38
39ifdef CONFIG_ARC_CURR_IN_REG
40# For a global register defintion, make sure it gets passed to every file
41# We had a customer reported bug where some code built in kernel was NOT using
42# any kernel headers, and missing the r25 global register
43# Can't do unconditionally because of recursive include issues
44# due to <linux/thread_info.h>
45LINUXINCLUDE	+=  -include ${src}/arch/arc/include/asm/current.h
46endif
47
48upto_gcc44    :=  $(call cc-ifversion, -le, 0404, y)
49atleast_gcc44 :=  $(call cc-ifversion, -ge, 0404, y)
50
51cflags-$(atleast_gcc44)			+= -fsection-anchors
52
53cflags-$(CONFIG_ARC_HAS_LLSC)		+= -mlock
54cflags-$(CONFIG_ARC_HAS_SWAPE)		+= -mswape
55
56ifdef CONFIG_ISA_ARCV2
57
58ifndef CONFIG_ARC_HAS_LL64
59cflags-y				+= -mno-ll64
60endif
61
62ifndef CONFIG_ARC_HAS_DIV_REM
63cflags-y				+= -mno-div-rem
64endif
65
66endif
67
68cfi := $(call as-instr,.cfi_startproc\n.cfi_endproc,-DARC_DW2_UNWIND_AS_CFI)
69cflags-$(CONFIG_ARC_DW2_UNWIND)		+= -fasynchronous-unwind-tables $(cfi)
70
71ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE
72# Generic build system uses -O2, we want -O3
73# Note: No need to add to cflags-y as that happens anyways
74ARCH_CFLAGS += -O3
75endif
76
77# small data is default for elf32 tool-chain. If not usable, disable it
78# This also allows repurposing GP as scratch reg to gcc reg allocator
79disable_small_data := y
80cflags-$(disable_small_data)		+= -mno-sdata -fcall-used-gp
81
82cflags-$(CONFIG_CPU_BIG_ENDIAN)		+= -mbig-endian
83ldflags-$(CONFIG_CPU_BIG_ENDIAN)	+= -EB
84
85# STAR 9000518362: (fixed with binutils shipping with gcc 4.8)
86# arc-linux-uclibc-ld (buildroot) or arceb-elf32-ld (EZChip) don't accept
87# --build-id w/o "-marclinux". Default arc-elf32-ld is OK
88ldflags-$(upto_gcc44)			+= -marclinux
89
90LIBGCC	:= $(shell $(CC) $(cflags-y) --print-libgcc-file-name)
91
92# Modules with short calls might break for calls into builtin-kernel
93KBUILD_CFLAGS_MODULE	+= -mlong-calls -mno-millicode
94
95# Finally dump eveything into kernel build system
96KBUILD_CFLAGS	+= $(cflags-y)
97KBUILD_AFLAGS	+= $(KBUILD_CFLAGS)
98LDFLAGS		+= $(ldflags-y)
99
100head-y		:= arch/arc/kernel/head.o
101
102# See arch/arc/Kbuild for content of core part of the kernel
103core-y		+= arch/arc/
104
105# w/o this dtb won't embed into kernel binary
106core-y		+= arch/arc/boot/dts/
107
108core-$(CONFIG_ARC_PLAT_SIM)	+= arch/arc/plat-sim/
109core-$(CONFIG_ARC_PLAT_TB10X)	+= arch/arc/plat-tb10x/
110core-$(CONFIG_ARC_PLAT_AXS10X)	+= arch/arc/plat-axs10x/
111core-$(CONFIG_ARC_PLAT_EZNPS)	+= arch/arc/plat-eznps/
112
113ifdef CONFIG_ARC_PLAT_EZNPS
114KBUILD_CPPFLAGS += -I$(srctree)/arch/arc/plat-eznps/include
115endif
116
117drivers-$(CONFIG_OPROFILE)	+= arch/arc/oprofile/
118
119libs-y		+= arch/arc/lib/ $(LIBGCC)
120
121boot		:= arch/arc/boot
122
123#default target for make without any arguments.
124KBUILD_IMAGE	:= bootpImage
125
126all:	$(KBUILD_IMAGE)
127bootpImage: vmlinux
128
129boot_targets += uImage uImage.bin uImage.gz
130
131$(boot_targets): vmlinux
132	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
133
134%.dtb %.dtb.S %.dtb.o: scripts
135	$(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@
136
137dtbs: scripts
138	$(Q)$(MAKE) $(build)=$(boot)/dts
139
140archclean:
141	$(Q)$(MAKE) $(clean)=$(boot)
142
143# Hacks to enable final link due to absence of link-time branch relexation
144# and gcc choosing optimal(shorter) branches at -O3
145#
146# vineetg Feb 2010: -mlong-calls switched off for overall kernel build
147# However lib/decompress_inflate.o (.init.text) calls
148# zlib_inflate_workspacesize (.text) causing relocation errors.
149# Thus forcing all exten calls in this file to be long calls
150export CFLAGS_decompress_inflate.o = -mmedium-calls
151export CFLAGS_initramfs.o = -mmedium-calls
152ifdef CONFIG_SMP
153export CFLAGS_core.o = -mmedium-calls
154endif
155