xref: /openbmc/linux/arch/arc/Makefile (revision cfca4b5a)
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 := haps_hs_smp_defconfig
7
8ifeq ($(CROSS_COMPILE),)
9CROSS_COMPILE := $(call cc-cross-prefix, arc-linux- arceb-linux-)
10endif
11
12cflags-y	+= -fno-common -pipe -fno-builtin -mmedium-calls -D__linux__
13
14tune-mcpu-def-$(CONFIG_ISA_ARCOMPACT)	:= -mcpu=arc700
15tune-mcpu-def-$(CONFIG_ISA_ARCV2)	:= -mcpu=hs38
16
17ifeq ($(CONFIG_ARC_TUNE_MCPU),)
18cflags-y				+= $(tune-mcpu-def-y)
19else
20tune-mcpu				:= $(CONFIG_ARC_TUNE_MCPU)
21ifneq ($(call cc-option,$(tune-mcpu)),)
22cflags-y				+= $(tune-mcpu)
23else
24# The flag provided by 'CONFIG_ARC_TUNE_MCPU' option isn't known by this compiler
25# (probably the compiler is too old). Use ISA default mcpu flag instead as a safe option.
26$(warning ** WARNING ** CONFIG_ARC_TUNE_MCPU flag '$(tune-mcpu)' is unknown, fallback to '$(tune-mcpu-def-y)')
27cflags-y				+= $(tune-mcpu-def-y)
28endif
29endif
30
31ifdef CONFIG_ARC_CURR_IN_REG
32# For a global register definition, make sure it gets passed to every file
33# We had a customer reported bug where some code built in kernel was NOT using
34# any kernel headers, and missing the global register
35# Can't do unconditionally because of recursive include issues
36# due to <linux/thread_info.h>
37LINUXINCLUDE	+=  -include $(srctree)/arch/arc/include/asm/current.h
38cflags-y	+= -ffixed-gp
39endif
40
41cflags-y				+= -fsection-anchors
42
43cflags-$(CONFIG_ARC_HAS_LLSC)		+= -mlock
44cflags-$(CONFIG_ARC_HAS_SWAPE)		+= -mswape
45
46ifdef CONFIG_ISA_ARCV2
47
48ifdef CONFIG_ARC_USE_UNALIGNED_MEM_ACCESS
49cflags-y				+= -munaligned-access
50else
51cflags-y				+= -mno-unaligned-access
52endif
53
54ifndef CONFIG_ARC_HAS_LL64
55cflags-y				+= -mno-ll64
56endif
57
58ifndef CONFIG_ARC_HAS_DIV_REM
59cflags-y				+= -mno-div-rem
60endif
61
62endif
63
64cfi := $(call as-instr,.cfi_startproc\n.cfi_endproc,-DARC_DW2_UNWIND_AS_CFI)
65cflags-$(CONFIG_ARC_DW2_UNWIND)		+= -fasynchronous-unwind-tables $(cfi)
66
67# small data is default for elf32 tool-chain. If not usable, disable it
68# This also allows repurposing GP as scratch reg to gcc reg allocator
69disable_small_data := y
70cflags-$(disable_small_data)		+= -mno-sdata
71
72cflags-$(CONFIG_CPU_BIG_ENDIAN)		+= -mbig-endian
73ldflags-$(CONFIG_CPU_BIG_ENDIAN)	+= -EB
74
75LIBGCC	= $(shell $(CC) $(cflags-y) --print-libgcc-file-name)
76
77# Modules with short calls might break for calls into builtin-kernel
78KBUILD_CFLAGS_MODULE	+= -mlong-calls -mno-millicode
79
80# Finally dump eveything into kernel build system
81KBUILD_CFLAGS	+= $(cflags-y)
82KBUILD_AFLAGS	+= $(KBUILD_CFLAGS)
83KBUILD_LDFLAGS	+= $(ldflags-y)
84
85# w/o this dtb won't embed into kernel binary
86core-y		+= arch/arc/boot/dts/
87
88core-y				+= arch/arc/plat-sim/
89core-$(CONFIG_ARC_PLAT_TB10X)	+= arch/arc/plat-tb10x/
90core-$(CONFIG_ARC_PLAT_AXS10X)	+= arch/arc/plat-axs10x/
91core-$(CONFIG_ARC_SOC_HSDK)	+= arch/arc/plat-hsdk/
92
93libs-y		+= arch/arc/lib/ $(LIBGCC)
94
95boot		:= arch/arc/boot
96
97boot_targets := uImage.bin uImage.gz uImage.lzma
98
99PHONY += $(boot_targets)
100$(boot_targets): vmlinux
101	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
102
103uimage-default-y			:= uImage.bin
104uimage-default-$(CONFIG_KERNEL_GZIP)	:= uImage.gz
105uimage-default-$(CONFIG_KERNEL_LZMA)	:= uImage.lzma
106
107PHONY += uImage
108uImage: $(uimage-default-y)
109	@ln -sf $< $(boot)/uImage
110	@$(kecho) '  Image $(boot)/uImage is ready'
111
112CLEAN_FILES += $(boot)/uImage
113