Commit | Line | Data |
---|---|---|
cfdbc2e1 VG |
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 | ||
9 | UTS_MACHINE := arc | |
10 | ||
af4c3ae3 | 11 | ifeq ($(CROSS_COMPILE),) |
5a45da02 | 12 | CROSS_COMPILE := arc-linux-uclibc- |
af4c3ae3 VG |
13 | endif |
14 | ||
cfdbc2e1 VG |
15 | KBUILD_DEFCONFIG := fpga_defconfig |
16 | ||
cfdbc2e1 VG |
17 | cflags-y += -mA7 -fno-common -pipe -fno-builtin -D__linux__ |
18 | ||
080c3747 VG |
19 | ifdef 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 | |
8235703e | 23 | # Can't do unconditionally because of recursive include issues |
080c3747 VG |
24 | # due to <linux/thread_info.h> |
25 | LINUXINCLUDE += -include ${src}/arch/arc/include/asm/current.h | |
26 | endif | |
27 | ||
5a45da02 VG |
28 | upto_gcc42 := $(call cc-ifversion, -le, 0402, y) |
29 | upto_gcc44 := $(call cc-ifversion, -le, 0404, y) | |
30 | atleast_gcc44 := $(call cc-ifversion, -ge, 0404, y) | |
31 | atleast_gcc48 := $(call cc-ifversion, -ge, 0408, y) | |
32 | ||
cfdbc2e1 VG |
33 | cflags-$(atleast_gcc44) += -fsection-anchors |
34 | ||
35 | cflags-$(CONFIG_ARC_HAS_LLSC) += -mlock | |
36 | cflags-$(CONFIG_ARC_HAS_SWAPE) += -mswape | |
37 | cflags-$(CONFIG_ARC_HAS_RTSC) += -mrtsc | |
38 | cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables | |
39 | ||
5a45da02 VG |
40 | # By default gcc 4.8 generates dwarf4 which kernel unwinder can't grok |
41 | ifeq ($(atleast_gcc48),y) | |
42 | cflags-$(CONFIG_ARC_DW2_UNWIND) += -gdwarf-2 | |
43 | endif | |
44 | ||
cfdbc2e1 VG |
45 | ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE |
46 | # Generic build system uses -O2, we want -O3 | |
47 | cflags-y += -O3 | |
48 | endif | |
49 | ||
50 | # small data is default for elf32 tool-chain. If not usable, disable it | |
51 | # This also allows repurposing GP as scratch reg to gcc reg allocator | |
52 | disable_small_data := y | |
53 | cflags-$(disable_small_data) += -mno-sdata -fcall-used-gp | |
54 | ||
55 | cflags-$(CONFIG_CPU_BIG_ENDIAN) += -mbig-endian | |
56 | ldflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB | |
57 | ||
5a45da02 | 58 | # STAR 9000518362: (fixed with binutils shipping with gcc 4.8) |
cfdbc2e1 | 59 | # arc-linux-uclibc-ld (buildroot) or arceb-elf32-ld (EZChip) don't accept |
5a45da02 VG |
60 | # --build-id w/o "-marclinux". Default arc-elf32-ld is OK |
61 | ldflags-$(upto_gcc44) += -marclinux | |
cfdbc2e1 VG |
62 | |
63 | ARC_LIBGCC := -mA7 | |
64 | cflags-$(CONFIG_ARC_HAS_HW_MPY) += -multcost=16 | |
65 | ||
66 | ifndef CONFIG_ARC_HAS_HW_MPY | |
67 | cflags-y += -mno-mpy | |
68 | ||
69 | # newlib for ARC700 assumes MPY to be always present, which is generally true | |
70 | # However, if someone really doesn't want MPY, we need to use the 600 ver | |
71 | # which coupled with -mno-mpy will use mpy emulation | |
72 | # With gcc 4.4.7, -mno-mpy is enough to make any other related adjustments, | |
73 | # e.g. increased cost of MPY. With gcc 4.2.1 this had to be explicitly hinted | |
74 | ||
5a45da02 VG |
75 | ifeq ($(upto_gcc42),y) |
76 | ARC_LIBGCC := -marc600 | |
cfdbc2e1 VG |
77 | cflags-y += -multcost=30 |
78 | endif | |
79 | endif | |
80 | ||
81 | LIBGCC := $(shell $(CC) $(ARC_LIBGCC) $(cflags-y) --print-libgcc-file-name) | |
82 | ||
83 | # Modules with short calls might break for calls into builtin-kernel | |
84 | KBUILD_CFLAGS_MODULE += -mlong-calls | |
85 | ||
86 | # Finally dump eveything into kernel build system | |
87 | KBUILD_CFLAGS += $(cflags-y) | |
88 | KBUILD_AFLAGS += $(KBUILD_CFLAGS) | |
89 | LDFLAGS += $(ldflags-y) | |
90 | ||
cfdbc2e1 VG |
91 | head-y := arch/arc/kernel/head.o |
92 | ||
93 | # See arch/arc/Kbuild for content of core part of the kernel | |
94 | core-y += arch/arc/ | |
95 | ||
999159a5 VG |
96 | # w/o this dtb won't embed into kernel binary |
97 | core-y += arch/arc/boot/dts/ | |
98 | ||
e97ff121 | 99 | core-$(CONFIG_ARC_PLAT_FPGA_LEGACY) += arch/arc/plat-arcfpga/ |
072eb693 | 100 | core-$(CONFIG_ARC_PLAT_TB10X) += arch/arc/plat-tb10x/ |
cfdbc2e1 | 101 | |
769bc1fd VG |
102 | drivers-$(CONFIG_OPROFILE) += arch/arc/oprofile/ |
103 | ||
cfdbc2e1 VG |
104 | libs-y += arch/arc/lib/ $(LIBGCC) |
105 | ||
fb0990bb VG |
106 | boot := arch/arc/boot |
107 | ||
cfdbc2e1 | 108 | #default target for make without any arguements. |
fb0990bb | 109 | KBUILD_IMAGE := bootpImage |
cfdbc2e1 VG |
110 | |
111 | all: $(KBUILD_IMAGE) | |
cfdbc2e1 VG |
112 | bootpImage: vmlinux |
113 | ||
104058ed VG |
114 | boot_targets += uImage uImage.bin uImage.gz |
115 | ||
116 | $(boot_targets): vmlinux | |
cfdbc2e1 VG |
117 | $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ |
118 | ||
999159a5 VG |
119 | %.dtb %.dtb.S %.dtb.o: scripts |
120 | $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@ | |
121 | ||
122 | dtbs: scripts | |
123 | $(Q)$(MAKE) $(build)=$(boot)/dts dtbs | |
124 | ||
cfdbc2e1 VG |
125 | archclean: |
126 | $(Q)$(MAKE) $(clean)=$(boot) | |
127 | ||
128 | # Hacks to enable final link due to absence of link-time branch relexation | |
129 | # and gcc choosing optimal(shorter) branches at -O3 | |
130 | # | |
131 | # vineetg Feb 2010: -mlong-calls switched off for overall kernel build | |
132 | # However lib/decompress_inflate.o (.init.text) calls | |
133 | # zlib_inflate_workspacesize (.text) causing relocation errors. | |
134 | # Thus forcing all exten calls in this file to be long calls | |
135 | export CFLAGS_decompress_inflate.o = -mmedium-calls | |
136 | export CFLAGS_initramfs.o = -mmedium-calls | |
41195d23 VG |
137 | ifdef CONFIG_SMP |
138 | export CFLAGS_core.o = -mmedium-calls | |
139 | endif |