projects/linux·blob master · refs

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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 := $(call cc-cross-prefix, arc-linux- arceb-linux- arc-linux-gnu-)
10endif
11
12cflags-y += -fno-common -pipe -fno-builtin -mmedium-calls -mswape -D__linux__
13
14tune-mcpu-def-$(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
44
45ifdef CONFIG_ISA_ARCV2
46
47ifdef CONFIG_ARC_USE_UNALIGNED_MEM_ACCESS
48cflags-y += -munaligned-access
49else
50cflags-y += -mno-unaligned-access
51endif
52
53ifndef CONFIG_ARC_HAS_LL64
54cflags-y += -mno-ll64
55endif
56
57ifndef CONFIG_ARC_HAS_DIV_REM
58cflags-y += -mno-div-rem
59endif
60
61endif
62
63cfi := $(call as-instr,.cfi_startproc\n.cfi_endproc,-DARC_DW2_UNWIND_AS_CFI)
64cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables $(cfi)
65
66# small data is default for elf32 tool-chain. If not usable, disable it
67# This also allows repurposing GP as scratch reg to gcc reg allocator
68disable_small_data := y
69cflags-$(disable_small_data) += -mno-sdata
70
71cflags-$(CONFIG_CPU_BIG_ENDIAN) += -mbig-endian
72ldflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB
73
74LIBGCC = $(shell $(CC) $(cflags-y) --print-libgcc-file-name)
75
76# Modules with short calls might break for calls into builtin-kernel
77KBUILD_CFLAGS_MODULE += -mlong-calls -mno-millicode
78
79# Finally dump eveything into kernel build system
80KBUILD_CFLAGS += $(cflags-y)
81KBUILD_AFLAGS += $(KBUILD_CFLAGS)
82KBUILD_LDFLAGS += $(ldflags-y)
83
84core-y += arch/arc/plat-sim/
85core-$(CONFIG_ARC_PLAT_TB10X) += arch/arc/plat-tb10x/
86core-$(CONFIG_ARC_PLAT_AXS10X) += arch/arc/plat-axs10x/
87core-$(CONFIG_ARC_SOC_HSDK) += arch/arc/plat-hsdk/
88
89libs-y += arch/arc/lib/ $(LIBGCC)
90
91boot := arch/arc/boot
92
93boot_targets := uImage.bin uImage.gz uImage.lzma
94
95PHONY += $(boot_targets)
96$(boot_targets): vmlinux
97 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
98
99uimage-default-y := uImage.bin
100uimage-default-$(CONFIG_KERNEL_GZIP) := uImage.gz
101uimage-default-$(CONFIG_KERNEL_LZMA) := uImage.lzma
102
103PHONY += uImage
104uImage: $(uimage-default-y)
105 @ln -sf $< $(boot)/uImage
106 @$(kecho) ' Image $(boot)/uImage is ready'
107
108CLEAN_FILES += $(boot)/uImage