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 #
9 ifeq ($(CROSS_COMPILE),)
10 ifndef CONFIG_CPU_BIG_ENDIAN
11 CROSS_COMPILE := arc-linux-
12 else
13 CROSS_COMPILE := arceb-linux-
14 endif
15 endif
17 KBUILD_DEFCONFIG := nsim_700_defconfig
19 cflags-y += -fno-common -pipe -fno-builtin -mmedium-calls -D__linux__
20 cflags-$(CONFIG_ISA_ARCOMPACT) += -mA7
21 cflags-$(CONFIG_ISA_ARCV2) += -mcpu=archs
23 is_700 = $(shell $(CC) -dM -E - < /dev/null | grep -q "ARC700" && echo 1 || echo 0)
25 ifdef CONFIG_ISA_ARCOMPACT
26 ifeq ($(is_700), 0)
27 $(error Toolchain not configured for ARCompact builds)
28 endif
29 endif
31 ifdef CONFIG_ISA_ARCV2
32 ifeq ($(is_700), 1)
33 $(error Toolchain not configured for ARCv2 builds)
34 endif
35 endif
37 ifdef CONFIG_ARC_CURR_IN_REG
38 # For a global register defintion, make sure it gets passed to every file
39 # We had a customer reported bug where some code built in kernel was NOT using
40 # any kernel headers, and missing the r25 global register
41 # Can't do unconditionally because of recursive include issues
42 # due to <linux/thread_info.h>
43 LINUXINCLUDE += -include ${src}/arch/arc/include/asm/current.h
44 endif
46 cflags-y += -fsection-anchors
48 cflags-$(CONFIG_ARC_HAS_LLSC) += -mlock
49 cflags-$(CONFIG_ARC_HAS_SWAPE) += -mswape
51 ifdef CONFIG_ISA_ARCV2
53 ifndef CONFIG_ARC_HAS_LL64
54 cflags-y += -mno-ll64
55 endif
57 ifndef CONFIG_ARC_HAS_DIV_REM
58 cflags-y += -mno-div-rem
59 endif
61 endif
63 cfi := $(call as-instr,.cfi_startproc\n.cfi_endproc,-DARC_DW2_UNWIND_AS_CFI)
64 cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables $(cfi)
66 ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE
67 # Generic build system uses -O2, we want -O3
68 # Note: No need to add to cflags-y as that happens anyways
69 #
70 # Disable the false maybe-uninitialized warings gcc spits out at -O3
71 ARCH_CFLAGS += -O3 $(call cc-disable-warning,maybe-uninitialized,)
72 endif
74 # small data is default for elf32 tool-chain. If not usable, disable it
75 # This also allows repurposing GP as scratch reg to gcc reg allocator
76 disable_small_data := y
77 cflags-$(disable_small_data) += -mno-sdata -fcall-used-gp
79 cflags-$(CONFIG_CPU_BIG_ENDIAN) += -mbig-endian
80 ldflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB
82 LIBGCC := $(shell $(CC) $(cflags-y) --print-libgcc-file-name)
84 # Modules with short calls might break for calls into builtin-kernel
85 KBUILD_CFLAGS_MODULE += -mlong-calls -mno-millicode
87 # Finally dump eveything into kernel build system
88 KBUILD_CFLAGS += $(cflags-y)
89 KBUILD_AFLAGS += $(KBUILD_CFLAGS)
90 KBUILD_LDFLAGS += $(ldflags-y)
92 head-y := arch/arc/kernel/head.o
94 # See arch/arc/Kbuild for content of core part of the kernel
95 core-y += arch/arc/
97 # w/o this dtb won't embed into kernel binary
98 core-y += arch/arc/boot/dts/
100 core-y += arch/arc/plat-sim/
101 core-$(CONFIG_ARC_PLAT_TB10X) += arch/arc/plat-tb10x/
102 core-$(CONFIG_ARC_PLAT_AXS10X) += arch/arc/plat-axs10x/
103 core-$(CONFIG_ARC_PLAT_EZNPS) += arch/arc/plat-eznps/
104 core-$(CONFIG_ARC_SOC_HSDK) += arch/arc/plat-hsdk/
106 ifdef CONFIG_ARC_PLAT_EZNPS
107 KBUILD_CPPFLAGS += -I$(srctree)/arch/arc/plat-eznps/include
108 endif
110 drivers-$(CONFIG_OPROFILE) += arch/arc/oprofile/
112 libs-y += arch/arc/lib/ $(LIBGCC)
114 boot := arch/arc/boot
116 #default target for make without any arguments.
117 KBUILD_IMAGE := $(boot)/bootpImage
119 all: bootpImage
120 bootpImage: vmlinux
122 boot_targets += uImage uImage.bin uImage.gz
124 $(boot_targets): vmlinux
125 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
127 %.dtb %.dtb.S %.dtb.o: scripts
128 $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@
130 dtbs: scripts
131 $(Q)$(MAKE) $(build)=$(boot)/dts
133 archclean:
134 $(Q)$(MAKE) $(clean)=$(boot)