xref: /openbmc/linux/arch/arc/Makefile (revision ba61bb17)
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
9ifeq ($(CROSS_COMPILE),)
10ifndef CONFIG_CPU_BIG_ENDIAN
11CROSS_COMPILE := arc-linux-
12else
13CROSS_COMPILE := arceb-linux-
14endif
15endif
16
17KBUILD_DEFCONFIG := nsim_700_defconfig
18
19cflags-y	+= -fno-common -pipe -fno-builtin -D__linux__
20cflags-$(CONFIG_ISA_ARCOMPACT)	+= -mA7
21cflags-$(CONFIG_ISA_ARCV2)	+= -mcpu=archs
22
23is_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
37ifdef 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
41# Can't do unconditionally because of recursive include issues
42# due to <linux/thread_info.h>
43LINUXINCLUDE	+=  -include ${src}/arch/arc/include/asm/current.h
44endif
45
46upto_gcc44    :=  $(call cc-ifversion, -le, 0404, y)
47atleast_gcc44 :=  $(call cc-ifversion, -ge, 0404, y)
48
49cflags-$(atleast_gcc44)			+= -fsection-anchors
50
51cflags-$(CONFIG_ARC_HAS_LLSC)		+= -mlock
52cflags-$(CONFIG_ARC_HAS_SWAPE)		+= -mswape
53
54ifdef CONFIG_ISA_ARCV2
55
56ifndef CONFIG_ARC_HAS_LL64
57cflags-y				+= -mno-ll64
58endif
59
60ifndef CONFIG_ARC_HAS_DIV_REM
61cflags-y				+= -mno-div-rem
62endif
63
64endif
65
66cfi := $(call as-instr,.cfi_startproc\n.cfi_endproc,-DARC_DW2_UNWIND_AS_CFI)
67cflags-$(CONFIG_ARC_DW2_UNWIND)		+= -fasynchronous-unwind-tables $(cfi)
68
69ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE
70# Generic build system uses -O2, we want -O3
71# Note: No need to add to cflags-y as that happens anyways
72#
73# Disable the false maybe-uninitialized warings gcc spits out at -O3
74ARCH_CFLAGS += -O3 $(call cc-disable-warning,maybe-uninitialized,)
75endif
76
77# small data is default for elf32 tool-chain. If not usable, disable it
78# This also allows repurposing GP as scratch reg to gcc reg allocator
79disable_small_data := y
80cflags-$(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		+= $(ldflags-y)
99
100head-y		:= arch/arc/kernel/head.o
101
102# See arch/arc/Kbuild for content of core part of the kernel
103core-y		+= arch/arc/
104
105# w/o this dtb won't embed into kernel binary
106core-y		+= arch/arc/boot/dts/
107
108core-y				+= arch/arc/plat-sim/
109core-$(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/
112core-$(CONFIG_ARC_SOC_HSDK)	+= arch/arc/plat-hsdk/
113
114ifdef CONFIG_ARC_PLAT_EZNPS
115KBUILD_CPPFLAGS += -I$(srctree)/arch/arc/plat-eznps/include
116endif
117
118drivers-$(CONFIG_OPROFILE)	+= arch/arc/oprofile/
119
120libs-y		+= arch/arc/lib/ $(LIBGCC)
121
122boot		:= arch/arc/boot
123
124#default target for make without any arguments.
125KBUILD_IMAGE	:= $(boot)/bootpImage
126
127all:	bootpImage
128bootpImage: vmlinux
129
130boot_targets += uImage uImage.bin uImage.gz
131
132$(boot_targets): vmlinux
133	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
134
135%.dtb %.dtb.S %.dtb.o: scripts
136	$(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@
137
138dtbs: scripts
139	$(Q)$(MAKE) $(build)=$(boot)/dts
140
141archclean:
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
153ifdef CONFIG_SMP
154export CFLAGS_core.o = -mmedium-calls
155endif
156