Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1# SPDX-License-Identifier: GPL-2.0-only
2#
3# Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
4#
5
6KBUILD_DEFCONFIG := nsim_hs_defconfig
7
8ifeq ($(CROSS_COMPILE),)
9CROSS_COMPILE := $(call cc-cross-prefix, arc-linux- arceb-linux-)
10endif
11
12cflags-y += -fno-common -pipe -fno-builtin -mmedium-calls -D__linux__
13cflags-$(CONFIG_ISA_ARCOMPACT) += -mA7
14cflags-$(CONFIG_ISA_ARCV2) += -mcpu=hs38
15
16ifdef CONFIG_ARC_CURR_IN_REG
17# For a global register defintion, make sure it gets passed to every file
18# We had a customer reported bug where some code built in kernel was NOT using
19# any kernel headers, and missing the r25 global register
20# Can't do unconditionally because of recursive include issues
21# due to <linux/thread_info.h>
22LINUXINCLUDE += -include ${src}/arch/arc/include/asm/current.h
23endif
24
25cflags-y += -fsection-anchors
26
27cflags-$(CONFIG_ARC_HAS_LLSC) += -mlock
28cflags-$(CONFIG_ARC_HAS_SWAPE) += -mswape
29
30ifdef CONFIG_ISA_ARCV2
31
32ifdef CONFIG_ARC_USE_UNALIGNED_MEM_ACCESS
33cflags-y += -munaligned-access
34else
35cflags-y += -mno-unaligned-access
36endif
37
38ifndef CONFIG_ARC_HAS_LL64
39cflags-y += -mno-ll64
40endif
41
42ifndef CONFIG_ARC_HAS_DIV_REM
43cflags-y += -mno-div-rem
44endif
45
46endif
47
48cfi := $(call as-instr,.cfi_startproc\n.cfi_endproc,-DARC_DW2_UNWIND_AS_CFI)
49cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables $(cfi)
50
51ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE
52# Generic build system uses -O2, we want -O3
53# Note: No need to add to cflags-y as that happens anyways
54#
55# Disable the false maybe-uninitialized warings gcc spits out at -O3
56ARCH_CFLAGS += -O3 $(call cc-disable-warning,maybe-uninitialized,)
57endif
58
59# small data is default for elf32 tool-chain. If not usable, disable it
60# This also allows repurposing GP as scratch reg to gcc reg allocator
61disable_small_data := y
62cflags-$(disable_small_data) += -mno-sdata -fcall-used-gp
63
64cflags-$(CONFIG_CPU_BIG_ENDIAN) += -mbig-endian
65ldflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB
66
67LIBGCC = $(shell $(CC) $(cflags-y) --print-libgcc-file-name)
68
69# Modules with short calls might break for calls into builtin-kernel
70KBUILD_CFLAGS_MODULE += -mlong-calls -mno-millicode
71
72# Finally dump eveything into kernel build system
73KBUILD_CFLAGS += $(cflags-y)
74KBUILD_AFLAGS += $(KBUILD_CFLAGS)
75KBUILD_LDFLAGS += $(ldflags-y)
76
77head-y := arch/arc/kernel/head.o
78
79# See arch/arc/Kbuild for content of core part of the kernel
80core-y += arch/arc/
81
82# w/o this dtb won't embed into kernel binary
83core-y += arch/arc/boot/dts/
84
85core-y += arch/arc/plat-sim/
86core-$(CONFIG_ARC_PLAT_TB10X) += arch/arc/plat-tb10x/
87core-$(CONFIG_ARC_PLAT_AXS10X) += arch/arc/plat-axs10x/
88core-$(CONFIG_ARC_PLAT_EZNPS) += arch/arc/plat-eznps/
89core-$(CONFIG_ARC_SOC_HSDK) += arch/arc/plat-hsdk/
90
91ifdef CONFIG_ARC_PLAT_EZNPS
92KBUILD_CPPFLAGS += -I$(srctree)/arch/arc/plat-eznps/include
93endif
94
95drivers-$(CONFIG_OPROFILE) += arch/arc/oprofile/
96
97libs-y += arch/arc/lib/ $(LIBGCC)
98
99boot := arch/arc/boot
100
101#default target for make without any arguments.
102KBUILD_IMAGE := $(boot)/bootpImage
103
104all: bootpImage
105bootpImage: vmlinux
106
107boot_targets += uImage uImage.bin uImage.gz
108
109$(boot_targets): vmlinux
110 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
111
112archclean:
113 $(Q)$(MAKE) $(clean)=$(boot)