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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 ($(CROSS_COMPILE),) |
7c42eaf6 | 12 | CROSS_COMPILE := arc-linux- |
af4c3ae3 VG |
13 | endif |
14 | ||
7a70bf79 | 15 | KBUILD_DEFCONFIG := nsim_700_defconfig |
cfdbc2e1 | 16 | |
1f6ccfff | 17 | cflags-y += -fno-common -pipe -fno-builtin -D__linux__ |
40b8ad8f VG |
18 | cflags-$(CONFIG_ISA_ARCOMPACT) += -mA7 |
19 | cflags-$(CONFIG_ISA_ARCV2) += -mcpu=archs | |
cfdbc2e1 | 20 | |
080c3747 VG |
21 | ifdef CONFIG_ARC_CURR_IN_REG |
22 | # For a global register defintion, make sure it gets passed to every file | |
23 | # We had a customer reported bug where some code built in kernel was NOT using | |
24 | # any kernel headers, and missing the r25 global register | |
8235703e | 25 | # Can't do unconditionally because of recursive include issues |
080c3747 VG |
26 | # due to <linux/thread_info.h> |
27 | LINUXINCLUDE += -include ${src}/arch/arc/include/asm/current.h | |
28 | endif | |
29 | ||
5a45da02 VG |
30 | upto_gcc44 := $(call cc-ifversion, -le, 0404, y) |
31 | atleast_gcc44 := $(call cc-ifversion, -ge, 0404, y) | |
32 | atleast_gcc48 := $(call cc-ifversion, -ge, 0408, y) | |
33 | ||
cfdbc2e1 VG |
34 | cflags-$(atleast_gcc44) += -fsection-anchors |
35 | ||
36 | cflags-$(CONFIG_ARC_HAS_LLSC) += -mlock | |
37 | cflags-$(CONFIG_ARC_HAS_SWAPE) += -mswape | |
565a9b49 | 38 | |
d05a76ab AB |
39 | ifdef CONFIG_ISA_ARCV2 |
40 | ||
1f6ccfff | 41 | ifndef CONFIG_ARC_HAS_LL64 |
d05a76ab AB |
42 | cflags-y += -mno-ll64 |
43 | endif | |
44 | ||
45 | ifndef CONFIG_ARC_HAS_DIV_REM | |
46 | cflags-y += -mno-div-rem | |
47 | endif | |
48 | ||
1f6ccfff VG |
49 | endif |
50 | ||
cfdbc2e1 VG |
51 | cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables |
52 | ||
5a45da02 VG |
53 | # By default gcc 4.8 generates dwarf4 which kernel unwinder can't grok |
54 | ifeq ($(atleast_gcc48),y) | |
55 | cflags-$(CONFIG_ARC_DW2_UNWIND) += -gdwarf-2 | |
56 | endif | |
57 | ||
cfdbc2e1 VG |
58 | ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE |
59 | # Generic build system uses -O2, we want -O3 | |
97709069 VG |
60 | # Note: No need to add to cflags-y as that happens anyways |
61 | ARCH_CFLAGS += -O3 | |
cfdbc2e1 VG |
62 | endif |
63 | ||
64 | # small data is default for elf32 tool-chain. If not usable, disable it | |
65 | # This also allows repurposing GP as scratch reg to gcc reg allocator | |
66 | disable_small_data := y | |
67 | cflags-$(disable_small_data) += -mno-sdata -fcall-used-gp | |
68 | ||
69 | cflags-$(CONFIG_CPU_BIG_ENDIAN) += -mbig-endian | |
70 | ldflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB | |
71 | ||
5a45da02 | 72 | # STAR 9000518362: (fixed with binutils shipping with gcc 4.8) |
cfdbc2e1 | 73 | # arc-linux-uclibc-ld (buildroot) or arceb-elf32-ld (EZChip) don't accept |
5a45da02 VG |
74 | # --build-id w/o "-marclinux". Default arc-elf32-ld is OK |
75 | ldflags-$(upto_gcc44) += -marclinux | |
cfdbc2e1 | 76 | |
cfdbc2e1 VG |
77 | ifndef CONFIG_ARC_HAS_HW_MPY |
78 | cflags-y += -mno-mpy | |
cfdbc2e1 VG |
79 | endif |
80 | ||
68d8feee | 81 | LIBGCC := $(shell $(CC) $(cflags-y) --print-libgcc-file-name) |
cfdbc2e1 VG |
82 | |
83 | # Modules with short calls might break for calls into builtin-kernel | |
07fd7d4b | 84 | KBUILD_CFLAGS_MODULE += -mlong-calls -mno-millicode |
cfdbc2e1 VG |
85 | |
86 | # Finally dump eveything into kernel build system | |
87 | KBUILD_CFLAGS += $(cflags-y) | |
88 | KBUILD_AFLAGS += $(KBUILD_CFLAGS) | |
89 | LDFLAGS += $(ldflags-y) | |
90 | ||
cfdbc2e1 VG |
91 | head-y := arch/arc/kernel/head.o |
92 | ||
93 | # See arch/arc/Kbuild for content of core part of the kernel | |
94 | core-y += arch/arc/ | |
95 | ||
999159a5 VG |
96 | # w/o this dtb won't embed into kernel binary |
97 | core-y += arch/arc/boot/dts/ | |
98 | ||
fd155792 VG |
99 | core-$(CONFIG_ARC_PLAT_SIM) += arch/arc/plat-sim/ |
100 | core-$(CONFIG_ARC_PLAT_TB10X) += arch/arc/plat-tb10x/ | |
556cc1c5 | 101 | core-$(CONFIG_ARC_PLAT_AXS10X) += arch/arc/plat-axs10x/ |
cfdbc2e1 | 102 | |
769bc1fd VG |
103 | drivers-$(CONFIG_OPROFILE) += arch/arc/oprofile/ |
104 | ||
cfdbc2e1 VG |
105 | libs-y += arch/arc/lib/ $(LIBGCC) |
106 | ||
fb0990bb VG |
107 | boot := arch/arc/boot |
108 | ||
cfdbc2e1 | 109 | #default target for make without any arguements. |
fb0990bb | 110 | KBUILD_IMAGE := bootpImage |
cfdbc2e1 VG |
111 | |
112 | all: $(KBUILD_IMAGE) | |
cfdbc2e1 VG |
113 | bootpImage: vmlinux |
114 | ||
104058ed VG |
115 | boot_targets += uImage uImage.bin uImage.gz |
116 | ||
117 | $(boot_targets): vmlinux | |
cfdbc2e1 VG |
118 | $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ |
119 | ||
999159a5 VG |
120 | %.dtb %.dtb.S %.dtb.o: scripts |
121 | $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@ | |
122 | ||
123 | dtbs: scripts | |
10375ccc | 124 | $(Q)$(MAKE) $(build)=$(boot)/dts |
999159a5 | 125 | |
cfdbc2e1 VG |
126 | archclean: |
127 | $(Q)$(MAKE) $(clean)=$(boot) | |
128 | ||
129 | # Hacks to enable final link due to absence of link-time branch relexation | |
130 | # and gcc choosing optimal(shorter) branches at -O3 | |
131 | # | |
132 | # vineetg Feb 2010: -mlong-calls switched off for overall kernel build | |
133 | # However lib/decompress_inflate.o (.init.text) calls | |
134 | # zlib_inflate_workspacesize (.text) causing relocation errors. | |
135 | # Thus forcing all exten calls in this file to be long calls | |
136 | export CFLAGS_decompress_inflate.o = -mmedium-calls | |
137 | export CFLAGS_initramfs.o = -mmedium-calls | |
41195d23 VG |
138 | ifdef CONFIG_SMP |
139 | export CFLAGS_core.o = -mmedium-calls | |
140 | endif |