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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 | ||
11 | KBUILD_DEFCONFIG := fpga_defconfig | |
12 | ||
cfdbc2e1 VG |
13 | cflags-y += -mA7 -fno-common -pipe -fno-builtin -D__linux__ |
14 | ||
af617428 VG |
15 | LINUXINCLUDE += -include ${src}/arch/arc/include/asm/defines.h |
16 | ||
080c3747 VG |
17 | ifdef CONFIG_ARC_CURR_IN_REG |
18 | # For a global register defintion, make sure it gets passed to every file | |
19 | # We had a customer reported bug where some code built in kernel was NOT using | |
20 | # any kernel headers, and missing the r25 global register | |
21 | # Can't do unconditionally (like above) because of recursive include issues | |
22 | # due to <linux/thread_info.h> | |
23 | LINUXINCLUDE += -include ${src}/arch/arc/include/asm/current.h | |
24 | endif | |
25 | ||
cfdbc2e1 VG |
26 | atleast_gcc44 := $(call cc-ifversion, -gt, 0402, y) |
27 | cflags-$(atleast_gcc44) += -fsection-anchors | |
28 | ||
29 | cflags-$(CONFIG_ARC_HAS_LLSC) += -mlock | |
30 | cflags-$(CONFIG_ARC_HAS_SWAPE) += -mswape | |
31 | cflags-$(CONFIG_ARC_HAS_RTSC) += -mrtsc | |
32 | cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables | |
33 | ||
34 | ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE | |
35 | # Generic build system uses -O2, we want -O3 | |
36 | cflags-y += -O3 | |
37 | endif | |
38 | ||
39 | # small data is default for elf32 tool-chain. If not usable, disable it | |
40 | # This also allows repurposing GP as scratch reg to gcc reg allocator | |
41 | disable_small_data := y | |
42 | cflags-$(disable_small_data) += -mno-sdata -fcall-used-gp | |
43 | ||
44 | cflags-$(CONFIG_CPU_BIG_ENDIAN) += -mbig-endian | |
45 | ldflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB | |
46 | ||
47 | # STAR 9000518362: | |
48 | # arc-linux-uclibc-ld (buildroot) or arceb-elf32-ld (EZChip) don't accept | |
49 | # --build-id w/o "-marclinux". | |
50 | # Default arc-elf32-ld is OK | |
51 | ldflags-y += -marclinux | |
52 | ||
53 | ARC_LIBGCC := -mA7 | |
54 | cflags-$(CONFIG_ARC_HAS_HW_MPY) += -multcost=16 | |
55 | ||
56 | ifndef CONFIG_ARC_HAS_HW_MPY | |
57 | cflags-y += -mno-mpy | |
58 | ||
59 | # newlib for ARC700 assumes MPY to be always present, which is generally true | |
60 | # However, if someone really doesn't want MPY, we need to use the 600 ver | |
61 | # which coupled with -mno-mpy will use mpy emulation | |
62 | # With gcc 4.4.7, -mno-mpy is enough to make any other related adjustments, | |
63 | # e.g. increased cost of MPY. With gcc 4.2.1 this had to be explicitly hinted | |
64 | ||
65 | ARC_LIBGCC := -marc600 | |
66 | ifneq ($(atleast_gcc44),y) | |
67 | cflags-y += -multcost=30 | |
68 | endif | |
69 | endif | |
70 | ||
71 | LIBGCC := $(shell $(CC) $(ARC_LIBGCC) $(cflags-y) --print-libgcc-file-name) | |
72 | ||
73 | # Modules with short calls might break for calls into builtin-kernel | |
74 | KBUILD_CFLAGS_MODULE += -mlong-calls | |
75 | ||
76 | # Finally dump eveything into kernel build system | |
77 | KBUILD_CFLAGS += $(cflags-y) | |
78 | KBUILD_AFLAGS += $(KBUILD_CFLAGS) | |
79 | LDFLAGS += $(ldflags-y) | |
80 | ||
cfdbc2e1 VG |
81 | head-y := arch/arc/kernel/head.o |
82 | ||
83 | # See arch/arc/Kbuild for content of core part of the kernel | |
84 | core-y += arch/arc/ | |
85 | ||
999159a5 VG |
86 | # w/o this dtb won't embed into kernel binary |
87 | core-y += arch/arc/boot/dts/ | |
88 | ||
e97ff121 | 89 | core-$(CONFIG_ARC_PLAT_FPGA_LEGACY) += arch/arc/plat-arcfpga/ |
cfdbc2e1 | 90 | |
769bc1fd VG |
91 | drivers-$(CONFIG_OPROFILE) += arch/arc/oprofile/ |
92 | ||
cfdbc2e1 VG |
93 | libs-y += arch/arc/lib/ $(LIBGCC) |
94 | ||
95 | #default target for make without any arguements. | |
96 | KBUILD_IMAGE := bootpImage | |
97 | ||
98 | all: $(KBUILD_IMAGE) | |
99 | boot := arch/arc/boot | |
100 | ||
101 | bootpImage: vmlinux | |
102 | ||
103 | uImage: vmlinux | |
104 | $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ | |
105 | ||
999159a5 VG |
106 | %.dtb %.dtb.S %.dtb.o: scripts |
107 | $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@ | |
108 | ||
109 | dtbs: scripts | |
110 | $(Q)$(MAKE) $(build)=$(boot)/dts dtbs | |
111 | ||
cfdbc2e1 VG |
112 | archclean: |
113 | $(Q)$(MAKE) $(clean)=$(boot) | |
114 | ||
115 | # Hacks to enable final link due to absence of link-time branch relexation | |
116 | # and gcc choosing optimal(shorter) branches at -O3 | |
117 | # | |
118 | # vineetg Feb 2010: -mlong-calls switched off for overall kernel build | |
119 | # However lib/decompress_inflate.o (.init.text) calls | |
120 | # zlib_inflate_workspacesize (.text) causing relocation errors. | |
121 | # Thus forcing all exten calls in this file to be long calls | |
122 | export CFLAGS_decompress_inflate.o = -mmedium-calls | |
123 | export CFLAGS_initramfs.o = -mmedium-calls | |
41195d23 VG |
124 | ifdef CONFIG_SMP |
125 | export CFLAGS_core.o = -mmedium-calls | |
126 | endif |