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8c2c3df3 CM |
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 | ||
d4abc006 | 13 | LDFLAGS_vmlinux :=--no-undefined -X -z norelro |
8c2c3df3 | 14 | CPPFLAGS_vmlinux.lds = -DTEXT_OFFSET=$(TEXT_OFFSET) |
8c2c3df3 CM |
15 | GZFLAGS :=-9 |
16 | ||
b7ada2c0 ND |
17 | ifeq ($(CONFIG_RELOCATABLE), y) |
18 | # Pass --no-apply-dynamic-relocs to restore pre-binutils-2.27 behaviour | |
19 | # for relative relocs, since this leads to better Image compression | |
20 | # with the relocation offsets always being zero. | |
d4abc006 | 21 | LDFLAGS_vmlinux += -shared -Bsymbolic -z notext \ |
b7ada2c0 | 22 | $(call ld-option, --no-apply-dynamic-relocs) |
1e48ef7f AB |
23 | endif |
24 | ||
6ffe9923 WD |
25 | ifeq ($(CONFIG_ARM64_ERRATUM_843419),y) |
26 | ifeq ($(call ld-option, --fix-cortex-a53-843419),) | |
27 | $(warning ld does not support --fix-cortex-a53-843419; kernel may be susceptible to erratum) | |
28 | else | |
5c41c483 ST |
29 | ifeq ($(call gold-ifversion, -lt, 114000000, y), y) |
30 | $(warning This version of GNU gold may generate incorrect code with --fix-cortex-a53-843419;\ | |
31 | see https://sourceware.org/bugzilla/show_bug.cgi?id=21491) | |
32 | endif | |
6ffe9923 WD |
33 | LDFLAGS_vmlinux += --fix-cortex-a53-843419 |
34 | endif | |
5c41c483 ST |
35 | else |
36 | ifeq ($(ld-name),gold) | |
37 | # Pass --no-fix-cortex-a53-843419 to ensure the erratum fix is disabled | |
38 | LDFLAGS += --no-fix-cortex-a53-843419 | |
39 | endif | |
6ffe9923 WD |
40 | endif |
41 | ||
8c2c3df3 CM |
42 | KBUILD_DEFCONFIG := defconfig |
43 | ||
c09d6a04 WD |
44 | # Check for binutils support for specific extensions |
45 | lseinstr := $(call as-instr,.arch_extension lse,-DCONFIG_AS_LSE=1) | |
46 | ||
47 | ifeq ($(CONFIG_ARM64_LSE_ATOMICS), y) | |
48 | ifeq ($(lseinstr),) | |
49 | $(warning LSE atomics not supported by binutils) | |
50 | endif | |
51 | endif | |
52 | ||
e07bcf71 GH |
53 | ifeq ($(cc-name),clang) |
54 | # This is a workaround for https://bugs.llvm.org/show_bug.cgi?id=30792. | |
55 | # TODO: revert when this is fixed in LLVM. | |
56 | KBUILD_CFLAGS += -mno-implicit-float | |
57 | else | |
58 | KBUILD_CFLAGS += -mgeneral-regs-only | |
59 | endif | |
60 | KBUILD_CFLAGS += $(lseinstr) | |
3af78e25 KB |
61 | |
62 | ifeq ($(CONFIG_COMPAT_VDSO), y) | |
63 | CROSS_COMPILE_ARM32 ?= $(CONFIG_CROSS_COMPILE_ARM32:"%"=%) | |
64 | # Check that the user has provided a valid prefix for the 32-bit toolchain. | |
65 | # To prevent selecting the system $(cc-name) by default, the prefix is not | |
66 | # allowed to be empty, unlike CROSS_COMPILE. In the unlikely event that the | |
67 | # system $(cc-name) is actually the 32-bit ARM compiler to be used, the | |
68 | # variable can be set to the dirname (e.g. CROSS_COMPILE_ARM32=/usr/bin/). | |
69 | # Note: this Makefile is read both before and after regenerating the config | |
70 | # (if needed). Any warning appearing before the config has been regenerated | |
71 | # should be ignored. If the error is triggered and you set | |
72 | # CONFIG_CROSS_COMPILE_ARM32, set CROSS_COMPILE_ARM32 to an appropriate value | |
73 | # when invoking make and fix CONFIG_CROSS_COMPILE_ARM32. | |
74 | ifeq ($(CROSS_COMPILE_ARM32),) | |
85e71857 | 75 | $(error CROSS_COMPILE_ARM32 not defined or empty, the compat vDSO will not be built) |
3af78e25 KB |
76 | else ifeq ($(cc-name),clang) |
77 | export CLANG_TRIPLE_ARM32 ?= $(CROSS_COMPILE_ARM32) | |
78 | export CLANG_TARGET_ARM32 := --target=$(notdir $(CLANG_TRIPLE_ARM32:%-=%)) | |
46d96430 DM |
79 | export GCC_TOOLCHAIN32_DIR := $(dir $(shell which $(CROSS_COMPILE_ARM32)ld)) |
80 | export GCC_TOOLCHAIN32 := $(realpath $(GCC_TOOLCHAIN32_DIR)/..) | |
81 | export CLANG_PREFIX32 := --prefix=$(GCC_TOOLCHAIN32_DIR) | |
82 | export CLANG_GCC32_TC := --gcc-toolchain=$(GCC_TOOLCHAIN32) | |
3af78e25 KB |
83 | export CONFIG_VDSO32 := y |
84 | vdso32 := -DCONFIG_VDSO32=1 | |
85 | else ifeq ($(shell which $(CROSS_COMPILE_ARM32)$(cc-name) 2> /dev/null),) | |
86 | $(error $(CROSS_COMPILE_ARM32)$(cc-name) not found, check CROSS_COMPILE_ARM32) | |
87 | else | |
88 | export CROSS_COMPILE_ARM32 | |
89 | export CONFIG_VDSO32 := y | |
90 | vdso32 := -DCONFIG_VDSO32=1 | |
91 | endif | |
92 | endif | |
93 | ||
94 | KBUILD_CFLAGS += $(vdso32) | |
728dabd6 | 95 | KBUILD_CFLAGS += -fno-asynchronous-unwind-tables |
67dfa175 | 96 | KBUILD_CFLAGS += $(call cc-option, -mpc-relative-literal-loads) |
a9c2864f | 97 | KBUILD_CFLAGS += -fno-pic |
3af78e25 | 98 | KBUILD_AFLAGS += $(lseinstr) $(vdso32) |
c09d6a04 | 99 | |
a0974e6e WD |
100 | ifeq ($(CONFIG_CPU_BIG_ENDIAN), y) |
101 | KBUILD_CPPFLAGS += -mbig-endian | |
102 | AS += -EB | |
c034eae9 OJ |
103 | # Prefer the baremetal ELF build target, but not all toolchains include |
104 | LDFLAGS += -EB $(call ld-option, -maarch64elfb, -maarch64linuxb) | |
cfa88c79 | 105 | UTS_MACHINE := aarch64_be |
a0974e6e | 106 | else |
8c2c3df3 CM |
107 | KBUILD_CPPFLAGS += -mlittle-endian |
108 | AS += -EL | |
c034eae9 OJ |
109 | # Same as above, prefer ELF but fall back to linux target if needed. |
110 | LDFLAGS += -EL $(call ld-option, -maarch64elf, -maarch64linux) | |
cfa88c79 | 111 | UTS_MACHINE := aarch64 |
a0974e6e | 112 | endif |
8c2c3df3 | 113 | |
8c2c3df3 CM |
114 | CHECKFLAGS += -D__aarch64__ |
115 | ||
fd045f6c | 116 | ifeq ($(CONFIG_ARM64_MODULE_CMODEL_LARGE), y) |
b6dd8e07 | 117 | KBUILD_CFLAGS_MODULE += -mcmodel=large |
7e77d5ee ST |
118 | ifeq ($(CONFIG_LTO_CLANG), y) |
119 | # Code model is not stored in LLVM IR, so we need to pass it also to LLVMgold | |
35740bcd | 120 | KBUILD_LDFLAGS_MODULE += -plugin-opt=-code-model=large |
7e77d5ee | 121 | endif |
df057cc7 WD |
122 | endif |
123 | ||
fd045f6c AB |
124 | ifeq ($(CONFIG_ARM64_MODULE_PLTS),y) |
125 | KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/arm64/kernel/module.lds | |
126 | endif | |
127 | ||
8c2c3df3 CM |
128 | # Default value |
129 | head-y := arch/arm64/kernel/head.o | |
130 | ||
131 | # The byte offset of the kernel image in RAM from the start of RAM. | |
da57a369 | 132 | ifeq ($(CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET), y) |
aed7eb83 MR |
133 | TEXT_OFFSET := $(shell awk "BEGIN {srand(); printf \"0x%06x\n\", \ |
134 | int(2 * 1024 * 1024 / (2 ^ $(CONFIG_ARM64_PAGE_SHIFT)) * \ | |
135 | rand()) * (2 ^ $(CONFIG_ARM64_PAGE_SHIFT))}") | |
da57a369 | 136 | else |
bfc0d5ba | 137 | TEXT_OFFSET := 0x01080000 |
da57a369 | 138 | endif |
8c2c3df3 | 139 | |
c3d5669e MK |
140 | ifeq ($(cc-name),clang) |
141 | KBUILD_CFLAGS += $(call cc-disable-warning, asm-operand-widths) | |
142 | endif | |
143 | ||
39d114dd AR |
144 | # KASAN_SHADOW_OFFSET = VA_START + (1 << (VA_BITS - 3)) - (1 << 61) |
145 | # in 32-bit arithmetic | |
146 | KASAN_SHADOW_OFFSET := $(shell printf "0x%08x00000000\n" $$(( \ | |
147 | (0xffffffff & (-1 << ($(CONFIG_ARM64_VA_BITS) - 32))) \ | |
148 | + (1 << ($(CONFIG_ARM64_VA_BITS) - 32 - 3)) \ | |
149 | - (1 << (64 - 32 - 3)) )) ) | |
150 | ||
8c2c3df3 CM |
151 | export TEXT_OFFSET GZFLAGS |
152 | ||
153 | core-y += arch/arm64/kernel/ arch/arm64/mm/ | |
e54bcde3 | 154 | core-$(CONFIG_NET) += arch/arm64/net/ |
6211753f | 155 | core-$(CONFIG_KVM) += arch/arm64/kvm/ |
63917f0b | 156 | core-$(CONFIG_XEN) += arch/arm64/xen/ |
2c98833a | 157 | core-$(CONFIG_CRYPTO) += arch/arm64/crypto/ |
8c2c3df3 | 158 | libs-y := arch/arm64/lib/ $(libs-y) |
ad08fd49 | 159 | core-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a |
8c2c3df3 CM |
160 | |
161 | # Default target when executing plain make | |
911da239 | 162 | ifeq ($(CONFIG_BUILD_ARM64_APPENDED_DTB_IMAGE),y) |
4bdcc936 | 163 | KBUILD_IMAGE := $(subst $\",,$(CONFIG_BUILD_ARM64_APPENDED_KERNEL_IMAGE_NAME)) |
911da239 | 164 | else |
70f915a2 | 165 | KBUILD_IMAGE := Image.gz |
911da239 AR |
166 | endif |
167 | ||
70f915a2 | 168 | KBUILD_DTBS := dtbs |
8c2c3df3 | 169 | |
70f915a2 | 170 | all: $(KBUILD_IMAGE) $(KBUILD_DTBS) |
8c2c3df3 CM |
171 | |
172 | boot := arch/arm64/boot | |
173 | ||
0723c05f OJ |
174 | Image: vmlinux |
175 | $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ | |
176 | ||
9ca4e58c | 177 | Image.%: Image |
70f915a2 | 178 | $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ |
8c2c3df3 | 179 | |
8684fa3e | 180 | zinstall install: |
70f915a2 | 181 | $(Q)$(MAKE) $(build)=$(boot) $@ |
8c2c3df3 | 182 | |
feea4603 HL |
183 | amlogic/%.dtb: scripts |
184 | $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@ | |
185 | ||
70f915a2 | 186 | %.dtb: scripts |
e655ebfc | 187 | $(Q)$(MAKE) $(build)=$(boot)/dts/amlogic $(boot)/dts/amlogic/$@ |
5ff7ef06 | 188 | ifeq ($(CONFIG_AMLOGIC_MODIFY),y) |
189 | %.dtbo: scripts | |
190 | $(Q)$(MAKE) $(build)=$(boot)/dts/amlogic $(boot)/dts/amlogic/$@ | |
191 | endif | |
70f915a2 | 192 | |
862f464a | 193 | PHONY += dtbs dtbs_install |
9fb5e537 RR |
194 | |
195 | dtbs: prepare scripts | |
d38726c4 | 196 | $(Q)$(MAKE) $(build)=$(boot)/dts |
8c2c3df3 | 197 | |
9fb5e537 RR |
198 | dtbs_install: |
199 | $(Q)$(MAKE) $(dtbinst)=$(boot)/dts | |
200 | ||
e23ef5fc | 201 | Image-dtb Image.gz-dtb: vmlinux scripts dtbs |
911da239 AR |
202 | $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ |
203 | ||
3c01742a KM |
204 | PHONY += vdso_install |
205 | vdso_install: | |
206 | $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@ | |
207 | ||
8c2c3df3 CM |
208 | # We use MRPROPER_FILES and CLEAN_FILES now |
209 | archclean: | |
210 | $(Q)$(MAKE) $(clean)=$(boot) | |
c7c52e48 | 211 | $(Q)$(MAKE) $(clean)=$(boot)/dts |
8c2c3df3 | 212 | |
b2c50f6f | 213 | ifeq ($(KBUILD_EXTMOD),) |
a66649da KB |
214 | # We need to generate vdso-offsets.h before compiling certain files in kernel/. |
215 | # In order to do that, we should use the archprepare target, but we can't since | |
216 | # asm-offsets.h is included in some files used to generate vdso-offsets.h, and | |
217 | # asm-offsets.h is built in prepare0, for which archprepare is a dependency. | |
218 | # Therefore we need to generate the header after prepare0 has been made, hence | |
219 | # this hack. | |
220 | prepare: vdso_prepare | |
221 | vdso_prepare: prepare0 | |
222 | $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso include/generated/vdso-offsets.h | |
3af78e25 KB |
223 | $(if $(CONFIG_VDSO32),$(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso32 \ |
224 | include/generated/vdso32-offsets.h) | |
b2c50f6f | 225 | endif |
a66649da | 226 | |
8c2c3df3 CM |
227 | define archhelp |
228 | echo '* Image.gz - Compressed kernel image (arch/$(ARCH)/boot/Image.gz)' | |
229 | echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)' | |
70f915a2 | 230 | echo '* dtbs - Build device tree blobs for enabled boards' |
862f464a | 231 | echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)' |
8c2c3df3 CM |
232 | echo ' install - Install uncompressed kernel' |
233 | echo ' zinstall - Install compressed kernel' | |
234 | echo ' Install using (your) ~/bin/installkernel or' | |
235 | echo ' (distribution) /sbin/installkernel or' | |
236 | echo ' install to $$(INSTALL_PATH) and run lilo' | |
237 | endef |