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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 | ||
af4c3ae3 | 11 | ifeq ($(CROSS_COMPILE),) |
5a45da02 | 12 | CROSS_COMPILE := arc-linux-uclibc- |
af4c3ae3 VG |
13 | endif |
14 | ||
7a70bf79 | 15 | KBUILD_DEFCONFIG := nsim_700_defconfig |
cfdbc2e1 | 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_gcc44 := $(call cc-ifversion, -le, 0404, y) |
29 | atleast_gcc44 := $(call cc-ifversion, -ge, 0404, y) | |
30 | atleast_gcc48 := $(call cc-ifversion, -ge, 0408, y) | |
31 | ||
cfdbc2e1 VG |
32 | cflags-$(atleast_gcc44) += -fsection-anchors |
33 | ||
34 | cflags-$(CONFIG_ARC_HAS_LLSC) += -mlock | |
35 | cflags-$(CONFIG_ARC_HAS_SWAPE) += -mswape | |
36 | cflags-$(CONFIG_ARC_HAS_RTSC) += -mrtsc | |
37 | cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables | |
38 | ||
5a45da02 VG |
39 | # By default gcc 4.8 generates dwarf4 which kernel unwinder can't grok |
40 | ifeq ($(atleast_gcc48),y) | |
41 | cflags-$(CONFIG_ARC_DW2_UNWIND) += -gdwarf-2 | |
42 | endif | |
43 | ||
cfdbc2e1 VG |
44 | ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE |
45 | # Generic build system uses -O2, we want -O3 | |
46 | cflags-y += -O3 | |
47 | endif | |
48 | ||
49 | # small data is default for elf32 tool-chain. If not usable, disable it | |
50 | # This also allows repurposing GP as scratch reg to gcc reg allocator | |
51 | disable_small_data := y | |
52 | cflags-$(disable_small_data) += -mno-sdata -fcall-used-gp | |
53 | ||
54 | cflags-$(CONFIG_CPU_BIG_ENDIAN) += -mbig-endian | |
55 | ldflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB | |
56 | ||
5a45da02 | 57 | # STAR 9000518362: (fixed with binutils shipping with gcc 4.8) |
cfdbc2e1 | 58 | # arc-linux-uclibc-ld (buildroot) or arceb-elf32-ld (EZChip) don't accept |
5a45da02 VG |
59 | # --build-id w/o "-marclinux". Default arc-elf32-ld is OK |
60 | ldflags-$(upto_gcc44) += -marclinux | |
cfdbc2e1 | 61 | |
cfdbc2e1 VG |
62 | ifndef CONFIG_ARC_HAS_HW_MPY |
63 | cflags-y += -mno-mpy | |
cfdbc2e1 VG |
64 | endif |
65 | ||
68d8feee | 66 | LIBGCC := $(shell $(CC) $(cflags-y) --print-libgcc-file-name) |
cfdbc2e1 VG |
67 | |
68 | # Modules with short calls might break for calls into builtin-kernel | |
69 | KBUILD_CFLAGS_MODULE += -mlong-calls | |
70 | ||
71 | # Finally dump eveything into kernel build system | |
72 | KBUILD_CFLAGS += $(cflags-y) | |
73 | KBUILD_AFLAGS += $(KBUILD_CFLAGS) | |
74 | LDFLAGS += $(ldflags-y) | |
75 | ||
cfdbc2e1 VG |
76 | head-y := arch/arc/kernel/head.o |
77 | ||
78 | # See arch/arc/Kbuild for content of core part of the kernel | |
79 | core-y += arch/arc/ | |
80 | ||
999159a5 VG |
81 | # w/o this dtb won't embed into kernel binary |
82 | core-y += arch/arc/boot/dts/ | |
83 | ||
e97ff121 | 84 | core-$(CONFIG_ARC_PLAT_FPGA_LEGACY) += arch/arc/plat-arcfpga/ |
072eb693 | 85 | core-$(CONFIG_ARC_PLAT_TB10X) += arch/arc/plat-tb10x/ |
cfdbc2e1 | 86 | |
769bc1fd VG |
87 | drivers-$(CONFIG_OPROFILE) += arch/arc/oprofile/ |
88 | ||
cfdbc2e1 VG |
89 | libs-y += arch/arc/lib/ $(LIBGCC) |
90 | ||
fb0990bb VG |
91 | boot := arch/arc/boot |
92 | ||
cfdbc2e1 | 93 | #default target for make without any arguements. |
fb0990bb | 94 | KBUILD_IMAGE := bootpImage |
cfdbc2e1 VG |
95 | |
96 | all: $(KBUILD_IMAGE) | |
cfdbc2e1 VG |
97 | bootpImage: vmlinux |
98 | ||
104058ed VG |
99 | boot_targets += uImage uImage.bin uImage.gz |
100 | ||
101 | $(boot_targets): vmlinux | |
cfdbc2e1 VG |
102 | $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ |
103 | ||
999159a5 VG |
104 | %.dtb %.dtb.S %.dtb.o: scripts |
105 | $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@ | |
106 | ||
107 | dtbs: scripts | |
108 | $(Q)$(MAKE) $(build)=$(boot)/dts dtbs | |
109 | ||
cfdbc2e1 VG |
110 | archclean: |
111 | $(Q)$(MAKE) $(clean)=$(boot) | |
112 | ||
113 | # Hacks to enable final link due to absence of link-time branch relexation | |
114 | # and gcc choosing optimal(shorter) branches at -O3 | |
115 | # | |
116 | # vineetg Feb 2010: -mlong-calls switched off for overall kernel build | |
117 | # However lib/decompress_inflate.o (.init.text) calls | |
118 | # zlib_inflate_workspacesize (.text) causing relocation errors. | |
119 | # Thus forcing all exten calls in this file to be long calls | |
120 | export CFLAGS_decompress_inflate.o = -mmedium-calls | |
121 | export CFLAGS_initramfs.o = -mmedium-calls | |
41195d23 VG |
122 | ifdef CONFIG_SMP |
123 | export CFLAGS_core.o = -mmedium-calls | |
124 | endif |