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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 ($(CROSS_COMPILE),) |
89a26928 | 12 | ifndef CONFIG_CPU_BIG_ENDIAN |
7c42eaf6 | 13 | CROSS_COMPILE := arc-linux- |
89a26928 VG |
14 | else |
15 | CROSS_COMPILE := arceb-linux- | |
16 | endif | |
af4c3ae3 VG |
17 | endif |
18 | ||
7a70bf79 | 19 | KBUILD_DEFCONFIG := nsim_700_defconfig |
cfdbc2e1 | 20 | |
1f6ccfff | 21 | cflags-y += -fno-common -pipe -fno-builtin -D__linux__ |
40b8ad8f VG |
22 | cflags-$(CONFIG_ISA_ARCOMPACT) += -mA7 |
23 | cflags-$(CONFIG_ISA_ARCV2) += -mcpu=archs | |
cfdbc2e1 | 24 | |
20d78037 VG |
25 | is_700 = $(shell $(CC) -dM -E - < /dev/null | grep -q "ARC700" && echo 1 || echo 0) |
26 | ||
27 | ifdef CONFIG_ISA_ARCOMPACT | |
28 | ifeq ($(is_700), 0) | |
29 | $(error Toolchain not configured for ARCompact builds) | |
30 | endif | |
31 | endif | |
32 | ||
33 | ifdef CONFIG_ISA_ARCV2 | |
34 | ifeq ($(is_700), 1) | |
35 | $(error Toolchain not configured for ARCv2 builds) | |
36 | endif | |
37 | endif | |
38 | ||
080c3747 VG |
39 | ifdef CONFIG_ARC_CURR_IN_REG |
40 | # For a global register defintion, make sure it gets passed to every file | |
41 | # We had a customer reported bug where some code built in kernel was NOT using | |
42 | # any kernel headers, and missing the r25 global register | |
8235703e | 43 | # Can't do unconditionally because of recursive include issues |
080c3747 VG |
44 | # due to <linux/thread_info.h> |
45 | LINUXINCLUDE += -include ${src}/arch/arc/include/asm/current.h | |
46 | endif | |
47 | ||
5a45da02 VG |
48 | upto_gcc44 := $(call cc-ifversion, -le, 0404, y) |
49 | atleast_gcc44 := $(call cc-ifversion, -ge, 0404, y) | |
5a45da02 | 50 | |
cfdbc2e1 VG |
51 | cflags-$(atleast_gcc44) += -fsection-anchors |
52 | ||
d05a76ab AB |
53 | ifdef CONFIG_ISA_ARCV2 |
54 | ||
1f6ccfff | 55 | ifndef CONFIG_ARC_HAS_LL64 |
d05a76ab AB |
56 | cflags-y += -mno-ll64 |
57 | endif | |
58 | ||
59 | ifndef CONFIG_ARC_HAS_DIV_REM | |
60 | cflags-y += -mno-div-rem | |
61 | endif | |
62 | ||
1f6ccfff VG |
63 | endif |
64 | ||
5a205a32 VG |
65 | cfi := $(call as-instr,.cfi_startproc\n.cfi_endproc,-DARC_DW2_UNWIND_AS_CFI) |
66 | cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables $(cfi) | |
6716dbbd | 67 | |
cfdbc2e1 VG |
68 | ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE |
69 | # Generic build system uses -O2, we want -O3 | |
97709069 | 70 | # Note: No need to add to cflags-y as that happens anyways |
6e8d666e | 71 | ARCH_CFLAGS += -O3 |
cfdbc2e1 VG |
72 | endif |
73 | ||
74 | # small data is default for elf32 tool-chain. If not usable, disable it | |
75 | # This also allows repurposing GP as scratch reg to gcc reg allocator | |
76 | disable_small_data := y | |
77 | cflags-$(disable_small_data) += -mno-sdata -fcall-used-gp | |
78 | ||
79 | cflags-$(CONFIG_CPU_BIG_ENDIAN) += -mbig-endian | |
80 | ldflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB | |
81 | ||
5a45da02 | 82 | # STAR 9000518362: (fixed with binutils shipping with gcc 4.8) |
cfdbc2e1 | 83 | # arc-linux-uclibc-ld (buildroot) or arceb-elf32-ld (EZChip) don't accept |
5a45da02 VG |
84 | # --build-id w/o "-marclinux". Default arc-elf32-ld is OK |
85 | ldflags-$(upto_gcc44) += -marclinux | |
cfdbc2e1 | 86 | |
68d8feee | 87 | LIBGCC := $(shell $(CC) $(cflags-y) --print-libgcc-file-name) |
cfdbc2e1 VG |
88 | |
89 | # Modules with short calls might break for calls into builtin-kernel | |
07fd7d4b | 90 | KBUILD_CFLAGS_MODULE += -mlong-calls -mno-millicode |
cfdbc2e1 VG |
91 | |
92 | # Finally dump eveything into kernel build system | |
93 | KBUILD_CFLAGS += $(cflags-y) | |
94 | KBUILD_AFLAGS += $(KBUILD_CFLAGS) | |
95 | LDFLAGS += $(ldflags-y) | |
96 | ||
cfdbc2e1 VG |
97 | head-y := arch/arc/kernel/head.o |
98 | ||
99 | # See arch/arc/Kbuild for content of core part of the kernel | |
100 | core-y += arch/arc/ | |
101 | ||
999159a5 VG |
102 | # w/o this dtb won't embed into kernel binary |
103 | core-y += arch/arc/boot/dts/ | |
104 | ||
fd155792 VG |
105 | core-$(CONFIG_ARC_PLAT_SIM) += arch/arc/plat-sim/ |
106 | core-$(CONFIG_ARC_PLAT_TB10X) += arch/arc/plat-tb10x/ | |
556cc1c5 | 107 | core-$(CONFIG_ARC_PLAT_AXS10X) += arch/arc/plat-axs10x/ |
96665789 NC |
108 | core-$(CONFIG_ARC_PLAT_EZNPS) += arch/arc/plat-eznps/ |
109 | ||
110 | ifdef CONFIG_ARC_PLAT_EZNPS | |
111 | KBUILD_CPPFLAGS += -I$(srctree)/arch/arc/plat-eznps/include | |
112 | endif | |
cfdbc2e1 | 113 | |
769bc1fd VG |
114 | drivers-$(CONFIG_OPROFILE) += arch/arc/oprofile/ |
115 | ||
cfdbc2e1 VG |
116 | libs-y += arch/arc/lib/ $(LIBGCC) |
117 | ||
fb0990bb VG |
118 | boot := arch/arc/boot |
119 | ||
2547476a | 120 | #default target for make without any arguments. |
fb0990bb | 121 | KBUILD_IMAGE := bootpImage |
cfdbc2e1 VG |
122 | |
123 | all: $(KBUILD_IMAGE) | |
cfdbc2e1 VG |
124 | bootpImage: vmlinux |
125 | ||
104058ed VG |
126 | boot_targets += uImage uImage.bin uImage.gz |
127 | ||
128 | $(boot_targets): vmlinux | |
cfdbc2e1 VG |
129 | $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ |
130 | ||
999159a5 VG |
131 | %.dtb %.dtb.S %.dtb.o: scripts |
132 | $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@ | |
133 | ||
134 | dtbs: scripts | |
10375ccc | 135 | $(Q)$(MAKE) $(build)=$(boot)/dts |
999159a5 | 136 | |
cfdbc2e1 VG |
137 | archclean: |
138 | $(Q)$(MAKE) $(clean)=$(boot) | |
139 | ||
140 | # Hacks to enable final link due to absence of link-time branch relexation | |
141 | # and gcc choosing optimal(shorter) branches at -O3 | |
142 | # | |
143 | # vineetg Feb 2010: -mlong-calls switched off for overall kernel build | |
144 | # However lib/decompress_inflate.o (.init.text) calls | |
145 | # zlib_inflate_workspacesize (.text) causing relocation errors. | |
146 | # Thus forcing all exten calls in this file to be long calls | |
147 | export CFLAGS_decompress_inflate.o = -mmedium-calls | |
148 | export CFLAGS_initramfs.o = -mmedium-calls | |
41195d23 VG |
149 | ifdef CONFIG_SMP |
150 | export CFLAGS_core.o = -mmedium-calls | |
151 | endif |