Loading...
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 $(srctree)/arch/arc/include/asm/current.h
23endif
24
25cflags-y += -fsection-anchors
26
27cflags-$(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 $(cfi)
50
51# small data is default for elf32 tool-chain. If not usable, disable it
52# This also allows repurposing GP as scratch reg to gcc reg allocator
53disable_small_data := y
54cflags-$(disable_small_data) += -mno-sdata -fcall-used-gp
55
56cflags-$(CONFIG_CPU_BIG_ENDIAN) += -mbig-endian
57ldflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB
58
59LIBGCC = $(shell $(CC) $(cflags-y) --print-libgcc-file-name)
60
61# Modules with short calls might break for calls into builtin-kernel
62KBUILD_CFLAGS_MODULE += -mlong-calls -mno-millicode
63
64# Finally dump eveything into kernel build system
65KBUILD_CFLAGS += $(cflags-y)
66KBUILD_AFLAGS += $(KBUILD_CFLAGS)
67KBUILD_LDFLAGS += $(ldflags-y)
68
69head-y := arch/arc/kernel/head.o
70
71# See arch/arc/Kbuild for content of core part of the kernel
72core-y += arch/arc
73
74# w/o this dtb won't embed into kernel binary
75core-y += arch/arc/boot/dts/
76
77core-y += arch/arc/plat-sim/
78core-$(CONFIG_ARC_PLAT_TB10X) += arch/arc/plat-tb10x/
79core-$(CONFIG_ARC_PLAT_AXS10X) += arch/arc/plat-axs10x/
80core-$(CONFIG_ARC_PLAT_EZNPS) += arch/arc/plat-eznps/
81core-$(CONFIG_ARC_SOC_HSDK) += arch/arc/plat-hsdk/
82
83ifdef CONFIG_ARC_PLAT_EZNPS
84KBUILD_CPPFLAGS += -I$(srctree)/arch/arc/plat-eznps/include
85endif
86
87drivers-$(CONFIG_OPROFILE) += arch/arc/oprofile/
88
89libs-y += arch/arc/lib/ $(LIBGCC)
90
91boot := arch/arc/boot
92
93#default target for make without any arguments.
94KBUILD_IMAGE := $(boot)/bootpImage
95
96all: bootpImage
97bootpImage: vmlinux
98
99boot_targets += uImage uImage.bin uImage.gz
100
101$(boot_targets): vmlinux
102 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
103
104archclean:
105 $(Q)$(MAKE) $(clean)=$(boot)
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
9UTS_MACHINE := arc
10
11ifeq ($(CROSS_COMPILE),)
12ifndef CONFIG_CPU_BIG_ENDIAN
13CROSS_COMPILE := arc-linux-
14else
15CROSS_COMPILE := arceb-linux-
16endif
17endif
18
19KBUILD_DEFCONFIG := nsim_700_defconfig
20
21cflags-y += -fno-common -pipe -fno-builtin -D__linux__
22cflags-$(CONFIG_ISA_ARCOMPACT) += -mA7
23cflags-$(CONFIG_ISA_ARCV2) += -mcpu=archs
24
25is_700 = $(shell $(CC) -dM -E - < /dev/null | grep -q "ARC700" && echo 1 || echo 0)
26
27ifdef CONFIG_ISA_ARCOMPACT
28ifeq ($(is_700), 0)
29 $(error Toolchain not configured for ARCompact builds)
30endif
31endif
32
33ifdef CONFIG_ISA_ARCV2
34ifeq ($(is_700), 1)
35 $(error Toolchain not configured for ARCv2 builds)
36endif
37endif
38
39ifdef CONFIG_ARC_CURR_IN_REG
40# For a global register defintion, make sure it gets passed to every file
41# We had a customer reported bug where some code built in kernel was NOT using
42# any kernel headers, and missing the r25 global register
43# Can't do unconditionally because of recursive include issues
44# due to <linux/thread_info.h>
45LINUXINCLUDE += -include ${src}/arch/arc/include/asm/current.h
46endif
47
48upto_gcc44 := $(call cc-ifversion, -le, 0404, y)
49atleast_gcc44 := $(call cc-ifversion, -ge, 0404, y)
50atleast_gcc48 := $(call cc-ifversion, -ge, 0408, y)
51
52cflags-$(atleast_gcc44) += -fsection-anchors
53
54cflags-$(CONFIG_ARC_HAS_LLSC) += -mlock
55cflags-$(CONFIG_ARC_HAS_SWAPE) += -mswape
56
57ifdef CONFIG_ISA_ARCV2
58
59ifndef CONFIG_ARC_HAS_LL64
60cflags-y += -mno-ll64
61endif
62
63ifndef CONFIG_ARC_HAS_DIV_REM
64cflags-y += -mno-div-rem
65endif
66
67endif
68
69cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables
70
71# By default gcc 4.8 generates dwarf4 which kernel unwinder can't grok
72ifeq ($(atleast_gcc48),y)
73cflags-$(CONFIG_ARC_DW2_UNWIND) += -gdwarf-2
74endif
75
76ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE
77# Generic build system uses -O2, we want -O3
78# Note: No need to add to cflags-y as that happens anyways
79#
80# Disable the false maybe-uninitialized warings gcc spits out at -O3
81ARCH_CFLAGS += -O3 $(call cc-disable-warning,maybe-uninitialized,)
82endif
83
84# small data is default for elf32 tool-chain. If not usable, disable it
85# This also allows repurposing GP as scratch reg to gcc reg allocator
86disable_small_data := y
87cflags-$(disable_small_data) += -mno-sdata -fcall-used-gp
88
89cflags-$(CONFIG_CPU_BIG_ENDIAN) += -mbig-endian
90ldflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB
91
92# STAR 9000518362: (fixed with binutils shipping with gcc 4.8)
93# arc-linux-uclibc-ld (buildroot) or arceb-elf32-ld (EZChip) don't accept
94# --build-id w/o "-marclinux". Default arc-elf32-ld is OK
95ldflags-$(upto_gcc44) += -marclinux
96
97LIBGCC := $(shell $(CC) $(cflags-y) --print-libgcc-file-name)
98
99# Modules with short calls might break for calls into builtin-kernel
100KBUILD_CFLAGS_MODULE += -mlong-calls -mno-millicode
101
102# Finally dump eveything into kernel build system
103KBUILD_CFLAGS += $(cflags-y)
104KBUILD_AFLAGS += $(KBUILD_CFLAGS)
105LDFLAGS += $(ldflags-y)
106
107head-y := arch/arc/kernel/head.o
108
109# See arch/arc/Kbuild for content of core part of the kernel
110core-y += arch/arc
111
112# w/o this dtb won't embed into kernel binary
113core-y += arch/arc/boot/dts/
114
115core-$(CONFIG_ARC_PLAT_SIM) += arch/arc/plat-sim/
116core-$(CONFIG_ARC_PLAT_TB10X) += arch/arc/plat-tb10x/
117core-$(CONFIG_ARC_PLAT_AXS10X) += arch/arc/plat-axs10x/
118
119drivers-$(CONFIG_OPROFILE) += arch/arc/oprofile/
120
121libs-y += arch/arc/lib/ $(LIBGCC)
122
123boot := arch/arc/boot
124
125#default target for make without any arguements.
126KBUILD_IMAGE := bootpImage
127
128all: $(KBUILD_IMAGE)
129bootpImage: vmlinux
130
131boot_targets += uImage uImage.bin uImage.gz
132
133$(boot_targets): vmlinux
134 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
135
136%.dtb %.dtb.S %.dtb.o: scripts
137 $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@
138
139dtbs: scripts
140 $(Q)$(MAKE) $(build)=$(boot)/dts
141
142archclean:
143 $(Q)$(MAKE) $(clean)=$(boot)
144
145# Hacks to enable final link due to absence of link-time branch relexation
146# and gcc choosing optimal(shorter) branches at -O3
147#
148# vineetg Feb 2010: -mlong-calls switched off for overall kernel build
149# However lib/decompress_inflate.o (.init.text) calls
150# zlib_inflate_workspacesize (.text) causing relocation errors.
151# Thus forcing all exten calls in this file to be long calls
152export CFLAGS_decompress_inflate.o = -mmedium-calls
153export CFLAGS_initramfs.o = -mmedium-calls
154ifdef CONFIG_SMP
155export CFLAGS_core.o = -mmedium-calls
156endif