xref: /openbmc/linux/arch/arm64/Makefile (revision 75305275) 
1#
2# arch/arm64/Makefile
3#
4# This file is included by the global makefile so that you can add your own
5# architecture-specific flags and dependencies.
6#
7# This file is subject to the terms and conditions of the GNU General Public
8# License.  See the file "COPYING" in the main directory of this archive
9# for more details.
10#
11# Copyright (C) 1995-2001 by Russell King
12
13LDFLAGS_vmlinux	:=-p --no-undefined -X
14CPPFLAGS_vmlinux.lds = -DTEXT_OFFSET=$(TEXT_OFFSET)
15OBJCOPYFLAGS	:=-O binary -R .note -R .note.gnu.build-id -R .comment -S
16GZFLAGS		:=-9
17
18KBUILD_DEFCONFIG := defconfig
19
20# Check for binutils support for specific extensions
21lseinstr := $(call as-instr,.arch_extension lse,-DCONFIG_AS_LSE=1)
22
23ifeq ($(CONFIG_ARM64_LSE_ATOMICS), y)
24  ifeq ($(lseinstr),)
25$(warning LSE atomics not supported by binutils)
26  endif
27endif
28
29KBUILD_CFLAGS	+= -mgeneral-regs-only $(lseinstr)
30KBUILD_AFLAGS	+= $(lseinstr)
31
32ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
33KBUILD_CPPFLAGS	+= -mbig-endian
34AS		+= -EB
35LD		+= -EB
36else
37KBUILD_CPPFLAGS	+= -mlittle-endian
38AS		+= -EL
39LD		+= -EL
40endif
41
42CHECKFLAGS	+= -D__aarch64__
43
44ifeq ($(CONFIG_ARM64_ERRATUM_843419), y)
45KBUILD_CFLAGS_MODULE	+= -mcmodel=large
46endif
47
48# Default value
49head-y		:= arch/arm64/kernel/head.o
50
51# The byte offset of the kernel image in RAM from the start of RAM.
52ifeq ($(CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET), y)
53TEXT_OFFSET := $(shell awk 'BEGIN {srand(); printf "0x%03x000\n", int(512 * rand())}')
54else
55TEXT_OFFSET := 0x00080000
56endif
57
58# KASAN_SHADOW_OFFSET = VA_START + (1 << (VA_BITS - 3)) - (1 << 61)
59# in 32-bit arithmetic
60KASAN_SHADOW_OFFSET := $(shell printf "0x%08x00000000\n" $$(( \
61			(0xffffffff & (-1 << ($(CONFIG_ARM64_VA_BITS) - 32))) \
62			+ (1 << ($(CONFIG_ARM64_VA_BITS) - 32 - 3)) \
63			- (1 << (64 - 32 - 3)) )) )
64
65export	TEXT_OFFSET GZFLAGS
66
67core-y		+= arch/arm64/kernel/ arch/arm64/mm/
68core-$(CONFIG_NET) += arch/arm64/net/
69core-$(CONFIG_KVM) += arch/arm64/kvm/
70core-$(CONFIG_XEN) += arch/arm64/xen/
71core-$(CONFIG_CRYPTO) += arch/arm64/crypto/
72libs-y		:= arch/arm64/lib/ $(libs-y)
73core-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
74
75# Default target when executing plain make
76KBUILD_IMAGE	:= Image.gz
77KBUILD_DTBS	:= dtbs
78
79all:	$(KBUILD_IMAGE) $(KBUILD_DTBS)
80
81boot := arch/arm64/boot
82
83Image: vmlinux
84	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
85
86Image.%: vmlinux
87	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
88
89zinstall install: vmlinux
90	$(Q)$(MAKE) $(build)=$(boot) $@
91
92%.dtb: scripts
93	$(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@
94
95PHONY += dtbs dtbs_install
96
97dtbs: prepare scripts
98	$(Q)$(MAKE) $(build)=$(boot)/dts
99
100dtbs_install:
101	$(Q)$(MAKE) $(dtbinst)=$(boot)/dts
102
103PHONY += vdso_install
104vdso_install:
105	$(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@
106
107# We use MRPROPER_FILES and CLEAN_FILES now
108archclean:
109	$(Q)$(MAKE) $(clean)=$(boot)
110	$(Q)$(MAKE) $(clean)=$(boot)/dts
111
112define archhelp
113  echo  '* Image.gz      - Compressed kernel image (arch/$(ARCH)/boot/Image.gz)'
114  echo  '  Image         - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
115  echo  '* dtbs          - Build device tree blobs for enabled boards'
116  echo  '  dtbs_install  - Install dtbs to $(INSTALL_DTBS_PATH)'
117  echo  '  install       - Install uncompressed kernel'
118  echo  '  zinstall      - Install compressed kernel'
119  echo  '                  Install using (your) ~/bin/installkernel or'
120  echo  '                  (distribution) /sbin/installkernel or'
121  echo  '                  install to $$(INSTALL_PATH) and run lilo'
122endef
123