Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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
9KBUILD_DEFCONFIG := nsim_hs_defconfig
10
11cflags-y += -fno-common -pipe -fno-builtin -mmedium-calls -D__linux__
12cflags-$(CONFIG_ISA_ARCOMPACT) += -mA7
13cflags-$(CONFIG_ISA_ARCV2) += -mcpu=hs38
14
15ifdef CONFIG_ARC_CURR_IN_REG
16# For a global register defintion, make sure it gets passed to every file
17# We had a customer reported bug where some code built in kernel was NOT using
18# any kernel headers, and missing the r25 global register
19# Can't do unconditionally because of recursive include issues
20# due to <linux/thread_info.h>
21LINUXINCLUDE += -include ${src}/arch/arc/include/asm/current.h
22endif
23
24cflags-y += -fsection-anchors
25
26cflags-$(CONFIG_ARC_HAS_LLSC) += -mlock
27cflags-$(CONFIG_ARC_HAS_SWAPE) += -mswape
28
29ifdef CONFIG_ISA_ARCV2
30
31ifndef CONFIG_ARC_HAS_LL64
32cflags-y += -mno-ll64
33endif
34
35ifndef CONFIG_ARC_HAS_DIV_REM
36cflags-y += -mno-div-rem
37endif
38
39endif
40
41cfi := $(call as-instr,.cfi_startproc\n.cfi_endproc,-DARC_DW2_UNWIND_AS_CFI)
42cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables $(cfi)
43
44ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE
45# Generic build system uses -O2, we want -O3
46# Note: No need to add to cflags-y as that happens anyways
47#
48# Disable the false maybe-uninitialized warings gcc spits out at -O3
49ARCH_CFLAGS += -O3 $(call cc-disable-warning,maybe-uninitialized,)
50endif
51
52# small data is default for elf32 tool-chain. If not usable, disable it
53# This also allows repurposing GP as scratch reg to gcc reg allocator
54disable_small_data := y
55cflags-$(disable_small_data) += -mno-sdata -fcall-used-gp
56
57cflags-$(CONFIG_CPU_BIG_ENDIAN) += -mbig-endian
58ldflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB
59
60LIBGCC = $(shell $(CC) $(cflags-y) --print-libgcc-file-name)
61
62# Modules with short calls might break for calls into builtin-kernel
63KBUILD_CFLAGS_MODULE += -mlong-calls -mno-millicode
64
65# Finally dump eveything into kernel build system
66KBUILD_CFLAGS += $(cflags-y)
67KBUILD_AFLAGS += $(KBUILD_CFLAGS)
68KBUILD_LDFLAGS += $(ldflags-y)
69
70head-y := arch/arc/kernel/head.o
71
72# See arch/arc/Kbuild for content of core part of the kernel
73core-y += arch/arc/
74
75# w/o this dtb won't embed into kernel binary
76core-y += arch/arc/boot/dts/
77
78core-y += arch/arc/plat-sim/
79core-$(CONFIG_ARC_PLAT_TB10X) += arch/arc/plat-tb10x/
80core-$(CONFIG_ARC_PLAT_AXS10X) += arch/arc/plat-axs10x/
81core-$(CONFIG_ARC_PLAT_EZNPS) += arch/arc/plat-eznps/
82core-$(CONFIG_ARC_SOC_HSDK) += arch/arc/plat-hsdk/
83
84ifdef CONFIG_ARC_PLAT_EZNPS
85KBUILD_CPPFLAGS += -I$(srctree)/arch/arc/plat-eznps/include
86endif
87
88drivers-$(CONFIG_OPROFILE) += arch/arc/oprofile/
89
90libs-y += arch/arc/lib/ $(LIBGCC)
91
92boot := arch/arc/boot
93
94#default target for make without any arguments.
95KBUILD_IMAGE := $(boot)/bootpImage
96
97all: bootpImage
98bootpImage: vmlinux
99
100boot_targets += uImage uImage.bin uImage.gz
101
102$(boot_targets): vmlinux
103 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
104
105archclean:
106 $(Q)$(MAKE) $(clean)=$(boot)