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fa96b57c HC |
1 | # SPDX-License-Identifier: GPL-2.0 |
2 | # | |
3 | # Author: Huacai Chen <chenhuacai@loongson.cn> | |
4 | # Copyright (C) 2020-2022 Loongson Technology Corporation Limited | |
5 | ||
6 | boot := arch/loongarch/boot | |
7 | ||
9e8536e2 HC |
8 | KBUILD_DEFCONFIG := loongson3_defconfig |
9 | ||
c5d5cba7 AB |
10 | image-name-y := vmlinux |
11 | image-name-$(CONFIG_EFI_ZBOOT) := vmlinuz | |
12 | ||
ead384d9 HC |
13 | ifndef CONFIG_EFI_STUB |
14 | KBUILD_IMAGE := $(boot)/vmlinux.elf | |
15 | else | |
c5d5cba7 | 16 | KBUILD_IMAGE := $(boot)/$(image-name-y).efi |
ead384d9 | 17 | endif |
fa96b57c HC |
18 | |
19 | # | |
20 | # Select the object file format to substitute into the linker script. | |
21 | # | |
22 | 64bit-tool-archpref = loongarch64 | |
23 | 32bit-bfd = elf32-loongarch | |
24 | 64bit-bfd = elf64-loongarch | |
25 | 32bit-emul = elf32loongarch | |
26 | 64bit-emul = elf64loongarch | |
27 | ||
4733f09d QZ |
28 | ifdef CONFIG_DYNAMIC_FTRACE |
29 | KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY | |
30 | CC_FLAGS_FTRACE := -fpatchable-function-entry=2 | |
31 | endif | |
32 | ||
fa96b57c HC |
33 | ifdef CONFIG_64BIT |
34 | tool-archpref = $(64bit-tool-archpref) | |
35 | UTS_MACHINE := loongarch64 | |
36 | endif | |
37 | ||
38 | ifneq ($(SUBARCH),$(ARCH)) | |
39 | ifeq ($(CROSS_COMPILE),) | |
40 | CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux- $(tool-archpref)-linux-gnu- $(tool-archpref)-unknown-linux-gnu-) | |
41 | endif | |
42 | endif | |
43 | ||
44 | ifdef CONFIG_64BIT | |
45 | ld-emul = $(64bit-emul) | |
46 | cflags-y += -mabi=lp64s | |
47 | endif | |
48 | ||
49 | cflags-y += -G0 -pipe -msoft-float | |
50 | LDFLAGS_vmlinux += -G0 -static -n -nostdlib | |
11cd8a64 XR |
51 | |
52 | # When the assembler supports explicit relocation hint, we must use it. | |
53 | # GCC may have -mexplicit-relocs off by default if it was built with an old | |
54 | # assembler, so we force it via an option. | |
55 | # | |
56 | # When the assembler does not supports explicit relocation hint, we can't use | |
57 | # it. Disable it if the compiler supports it. | |
58 | # | |
59 | # If you've seen "unknown reloc hint" message building the kernel and you are | |
60 | # now wondering why "-mexplicit-relocs" is not wrapped with cc-option: the | |
61 | # combination of a "new" assembler and "old" compiler is not supported. Either | |
62 | # upgrade the compiler or downgrade the assembler. | |
63 | ifdef CONFIG_AS_HAS_EXPLICIT_RELOCS | |
64 | cflags-y += -mexplicit-relocs | |
65 | KBUILD_CFLAGS_KERNEL += -mdirect-extern-access | |
66 | else | |
67 | cflags-y += $(call cc-option,-mno-explicit-relocs) | |
fa96b57c HC |
68 | KBUILD_AFLAGS_KERNEL += -Wa,-mla-global-with-pcrel |
69 | KBUILD_CFLAGS_KERNEL += -Wa,-mla-global-with-pcrel | |
70 | KBUILD_AFLAGS_MODULE += -Wa,-mla-global-with-abs | |
71 | KBUILD_CFLAGS_MODULE += -fplt -Wa,-mla-global-with-abs,-mla-local-with-abs | |
11cd8a64 | 72 | endif |
fa96b57c | 73 | |
d8da19fb YT |
74 | ifeq ($(CONFIG_RELOCATABLE),y) |
75 | KBUILD_CFLAGS_KERNEL += -fPIE | |
76 | LDFLAGS_vmlinux += -static -pie --no-dynamic-linker -z notext | |
77 | endif | |
78 | ||
fa96b57c HC |
79 | cflags-y += -ffreestanding |
80 | cflags-y += $(call cc-option, -mno-check-zero-division) | |
81 | ||
82 | load-y = 0x9000000000200000 | |
83 | bootvars-y = VMLINUX_LOAD_ADDRESS=$(load-y) | |
84 | ||
57fc7323 HC |
85 | drivers-$(CONFIG_PCI) += arch/loongarch/pci/ |
86 | ||
fa96b57c HC |
87 | KBUILD_AFLAGS += $(cflags-y) |
88 | KBUILD_CFLAGS += $(cflags-y) | |
89 | KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y) | |
90 | ||
91 | # This is required to get dwarf unwinding tables into .debug_frame | |
92 | # instead of .eh_frame so we don't discard them. | |
93 | KBUILD_CFLAGS += -fno-asynchronous-unwind-tables | |
94 | ||
41596803 | 95 | ifdef CONFIG_ARCH_STRICT_ALIGN |
fa96b57c HC |
96 | # Don't emit unaligned accesses. |
97 | # Not all LoongArch cores support unaligned access, and as kernel we can't | |
98 | # rely on others to provide emulation for these accesses. | |
99 | KBUILD_CFLAGS += $(call cc-option,-mstrict-align) | |
41596803 HC |
100 | else |
101 | # Optimise for performance on hardware supports unaligned access. | |
102 | KBUILD_CFLAGS += $(call cc-option,-mno-strict-align) | |
103 | endif | |
fa96b57c HC |
104 | |
105 | KBUILD_CFLAGS += -isystem $(shell $(CC) -print-file-name=include) | |
106 | ||
107 | KBUILD_LDFLAGS += -m $(ld-emul) | |
108 | ||
109 | ifdef CONFIG_LOONGARCH | |
110 | CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \ | |
83f638bc | 111 | grep -E -vw '__GNUC_(MINOR_|PATCHLEVEL_)?_' | \ |
fa96b57c HC |
112 | sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g') |
113 | endif | |
114 | ||
fa96b57c | 115 | libs-y += arch/loongarch/lib/ |
ead384d9 | 116 | libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a |
fa96b57c | 117 | |
366bb35a HC |
118 | # suspend and hibernation support |
119 | drivers-$(CONFIG_PM) += arch/loongarch/power/ | |
120 | ||
fa96b57c HC |
121 | ifeq ($(KBUILD_EXTMOD),) |
122 | prepare: vdso_prepare | |
123 | vdso_prepare: prepare0 | |
124 | $(Q)$(MAKE) $(build)=arch/loongarch/vdso include/generated/vdso-offsets.h | |
125 | endif | |
126 | ||
127 | PHONY += vdso_install | |
128 | vdso_install: | |
129 | $(Q)$(MAKE) $(build)=arch/loongarch/vdso $@ | |
130 | ||
ead384d9 | 131 | all: $(notdir $(KBUILD_IMAGE)) |
fa96b57c | 132 | |
c5d5cba7 | 133 | vmlinux.elf vmlinux.efi vmlinuz.efi: vmlinux |
ead384d9 | 134 | $(Q)$(MAKE) $(build)=$(boot) $(bootvars-y) $(boot)/$@ |
fa96b57c HC |
135 | |
136 | install: | |
c5d5cba7 | 137 | $(Q)install -D -m 755 $(KBUILD_IMAGE) $(INSTALL_PATH)/$(image-name-y)-$(KERNELRELEASE) |
fa96b57c HC |
138 | $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE) |
139 | $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE) | |
140 | ||
141 | define archhelp | |
142 | echo ' install - install kernel into $(INSTALL_PATH)' | |
143 | echo | |
144 | endef |