summaryrefslogtreecommitdiff
path: root/arch/arc/Makefile
blob: 9a36c04e4306ca3f3fd38b4d5bbdb8cc7d60d508 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
#
# Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#

UTS_MACHINE := arc

KBUILD_DEFCONFIG := fpga_defconfig

# For ARC FPGA Platforms
platform-$(CONFIG_ARC_PLAT_FPGA_LEGACY)	:= arcfpga
#New platform adds here

PLATFORM := $(platform-y)
export PLATFORM

cflags-y	+= -Iarch/arc/plat-$(PLATFORM)/include
cflags-y	+= -mA7 -fno-common -pipe -fno-builtin -D__linux__

LINUXINCLUDE	+=  -include ${src}/arch/arc/include/asm/defines.h

ifdef CONFIG_ARC_CURR_IN_REG
# For a global register defintion, make sure it gets passed to every file
# We had a customer reported bug where some code built in kernel was NOT using
# any kernel headers, and missing the r25 global register
# Can't do unconditionally (like above) because of recursive include issues
# due to <linux/thread_info.h>
LINUXINCLUDE	+=  -include ${src}/arch/arc/include/asm/current.h
endif

atleast_gcc44 :=  $(call cc-ifversion, -gt, 0402, y)
cflags-$(atleast_gcc44)			+= -fsection-anchors

cflags-$(CONFIG_ARC_HAS_LLSC)		+= -mlock
cflags-$(CONFIG_ARC_HAS_SWAPE)		+= -mswape
cflags-$(CONFIG_ARC_HAS_RTSC)		+= -mrtsc
cflags-$(CONFIG_ARC_DW2_UNWIND)		+= -fasynchronous-unwind-tables

ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE
# Generic build system uses -O2, we want -O3
cflags-y  += -O3
endif

# small data is default for elf32 tool-chain. If not usable, disable it
# This also allows repurposing GP as scratch reg to gcc reg allocator
disable_small_data := y
cflags-$(disable_small_data)		+= -mno-sdata -fcall-used-gp

cflags-$(CONFIG_CPU_BIG_ENDIAN)		+= -mbig-endian
ldflags-$(CONFIG_CPU_BIG_ENDIAN)	+= -EB

# STAR 9000518362:
# arc-linux-uclibc-ld (buildroot) or arceb-elf32-ld (EZChip) don't accept
# --build-id w/o "-marclinux".
# Default arc-elf32-ld is OK
ldflags-y				+= -marclinux

ARC_LIBGCC				:= -mA7
cflags-$(CONFIG_ARC_HAS_HW_MPY)		+= -multcost=16

ifndef CONFIG_ARC_HAS_HW_MPY
	cflags-y	+= -mno-mpy

# newlib for ARC700 assumes MPY to be always present, which is generally true
# However, if someone really doesn't want MPY, we need to use the 600 ver
# which coupled with -mno-mpy will use mpy emulation
# With gcc 4.4.7, -mno-mpy is enough to make any other related adjustments,
# e.g. increased cost of MPY. With gcc 4.2.1 this had to be explicitly hinted

	ARC_LIBGCC		:= -marc600
	ifneq ($(atleast_gcc44),y)
		cflags-y	+= -multcost=30
	endif
endif

LIBGCC	:= $(shell $(CC) $(ARC_LIBGCC) $(cflags-y) --print-libgcc-file-name)

# Modules with short calls might break for calls into builtin-kernel
KBUILD_CFLAGS_MODULE	+= -mlong-calls

# Finally dump eveything into kernel build system
KBUILD_CFLAGS	+= $(cflags-y)
KBUILD_AFLAGS	+= $(KBUILD_CFLAGS)
LDFLAGS		+= $(ldflags-y)

# Needed for Linker script preprocessing
KBUILD_CPPFLAGS	+= -Iarch/arc/plat-$(PLATFORM)/include

head-y		:= arch/arc/kernel/head.o

# See arch/arc/Kbuild for content of core part of the kernel
core-y		+= arch/arc/

# w/o this dtb won't embed into kernel binary
core-y		+= arch/arc/boot/dts/

# w/o this ifneq, make ARCH=arc clean was crapping out
ifneq ($(platform-y),)
core-y		+= arch/arc/plat-$(PLATFORM)/
endif

drivers-$(CONFIG_OPROFILE)	+= arch/arc/oprofile/

libs-y		+= arch/arc/lib/ $(LIBGCC)

#default target for make without any arguements.
KBUILD_IMAGE := bootpImage

all:	$(KBUILD_IMAGE)
boot	:= arch/arc/boot

bootpImage: vmlinux

uImage: vmlinux
	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@

%.dtb %.dtb.S %.dtb.o: scripts
	$(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@

dtbs: scripts
	$(Q)$(MAKE) $(build)=$(boot)/dts dtbs

archclean:
	$(Q)$(MAKE) $(clean)=$(boot)

# Hacks to enable final link due to absence of link-time branch relexation
# and gcc choosing optimal(shorter) branches at -O3
#
# vineetg Feb 2010: -mlong-calls switched off for overall kernel build
# However lib/decompress_inflate.o (.init.text) calls
# zlib_inflate_workspacesize (.text) causing relocation errors.
# Thus forcing all exten calls in this file to be long calls
export CFLAGS_decompress_inflate.o = -mmedium-calls
export CFLAGS_initramfs.o = -mmedium-calls
ifdef CONFIG_SMP
export CFLAGS_core.o = -mmedium-calls
endif