Commit | Line | Data |
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fbe934d6 | 1 | # This file is included by the global makefile so that you can add your own |
8212f898 | 2 | # architecture-specific flags and dependencies. |
fbe934d6 PD |
3 | # |
4 | # This file is subject to the terms and conditions of the GNU General Public | |
5 | # License. See the file "COPYING" in the main directory of this archive | |
6 | # for more details. | |
7 | # | |
8 | ||
fbe934d6 PD |
9 | OBJCOPYFLAGS := -O binary |
10 | LDFLAGS_vmlinux := | |
a1d2a6b4 AK |
11 | ifeq ($(CONFIG_DYNAMIC_FTRACE),y) |
12 | LDFLAGS_vmlinux := --no-relax | |
afc76b8b GR |
13 | KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY |
14 | CC_FLAGS_FTRACE := -fpatchable-function-entry=8 | |
a1d2a6b4 | 15 | endif |
aad15bc8 | 16 | |
5d2388db | 17 | ifeq ($(CONFIG_CMODEL_MEDLOW),y) |
aad15bc8 VC |
18 | KBUILD_CFLAGS_MODULE += -mcmodel=medany |
19 | endif | |
fbe934d6 | 20 | |
fbe934d6 PD |
21 | export BITS |
22 | ifeq ($(CONFIG_ARCH_RV64I),y) | |
23 | BITS := 64 | |
24 | UTS_MACHINE := riscv64 | |
25 | ||
26 | KBUILD_CFLAGS += -mabi=lp64 | |
27 | KBUILD_AFLAGS += -mabi=lp64 | |
a89757da | 28 | |
d503ac53 | 29 | KBUILD_LDFLAGS += -melf64lriscv |
fbe934d6 PD |
30 | else |
31 | BITS := 32 | |
32 | UTS_MACHINE := riscv32 | |
33 | ||
34 | KBUILD_CFLAGS += -mabi=ilp32 | |
35 | KBUILD_AFLAGS += -mabi=ilp32 | |
d503ac53 | 36 | KBUILD_LDFLAGS += -melf32lriscv |
fbe934d6 PD |
37 | endif |
38 | ||
ec3a5cb6 KR |
39 | ifeq ($(CONFIG_LD_IS_LLD),y) |
40 | KBUILD_CFLAGS += -mno-relax | |
41 | KBUILD_AFLAGS += -mno-relax | |
52cc02b9 | 42 | ifndef CONFIG_AS_IS_LLVM |
ec3a5cb6 KR |
43 | KBUILD_CFLAGS += -Wa,-mno-relax |
44 | KBUILD_AFLAGS += -Wa,-mno-relax | |
45 | endif | |
46 | endif | |
47 | ||
e8be5302 | 48 | # ISA string setting |
09afac77 CH |
49 | riscv-march-$(CONFIG_ARCH_RV32I) := rv32ima |
50 | riscv-march-$(CONFIG_ARCH_RV64I) := rv64ima | |
9671f706 | 51 | riscv-march-$(CONFIG_FPU) := $(riscv-march-y)fd |
e8be5302 | 52 | riscv-march-$(CONFIG_RISCV_ISA_C) := $(riscv-march-y)c |
6df2a016 AJ |
53 | |
54 | # Newer binutils versions default to ISA spec version 20191213 which moves some | |
55 | # instructions from the I extension to the Zicsr and Zifencei extensions. | |
56 | toolchain-need-zicsr-zifencei := $(call cc-option-yn, -march=$(riscv-march-y)_zicsr_zifencei) | |
57 | riscv-march-$(toolchain-need-zicsr-zifencei) := $(riscv-march-y)_zicsr_zifencei | |
58 | ||
1631ba12 HS |
59 | # Check if the toolchain supports Zicbom extension |
60 | toolchain-supports-zicbom := $(call cc-option-yn, -march=$(riscv-march-y)_zicbom) | |
61 | riscv-march-$(toolchain-supports-zicbom) := $(riscv-march-y)_zicbom | |
62 | ||
e8be5302 AK |
63 | KBUILD_CFLAGS += -march=$(subst fd,,$(riscv-march-y)) |
64 | KBUILD_AFLAGS += -march=$(riscv-march-y) | |
fbe934d6 | 65 | |
fbe934d6 PD |
66 | KBUILD_CFLAGS += -mno-save-restore |
67 | KBUILD_CFLAGS += -DCONFIG_PAGE_OFFSET=$(CONFIG_PAGE_OFFSET) | |
68 | ||
69 | ifeq ($(CONFIG_CMODEL_MEDLOW),y) | |
70 | KBUILD_CFLAGS += -mcmodel=medlow | |
71 | endif | |
72 | ifeq ($(CONFIG_CMODEL_MEDANY),y) | |
73 | KBUILD_CFLAGS += -mcmodel=medany | |
74 | endif | |
dbeb90b0 MH |
75 | ifeq ($(CONFIG_PERF_EVENTS),y) |
76 | KBUILD_CFLAGS += -fno-omit-frame-pointer | |
77 | endif | |
ab1ef68e ZL |
78 | |
79 | KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax) | |
c1f6eff3 | 80 | KBUILD_AFLAGS_MODULE += $(call as-option,-Wa$(comma)-mno-relax) |
fbe934d6 PD |
81 | |
82 | # GCC versions that support the "-mstrict-align" option default to allowing | |
83 | # unaligned accesses. While unaligned accesses are explicitly allowed in the | |
84 | # RISC-V ISA, they're emulated by machine mode traps on all extant | |
85 | # architectures. It's faster to have GCC emit only aligned accesses. | |
86 | KBUILD_CFLAGS += $(call cc-option,-mstrict-align) | |
87 | ||
fea2fed2 GR |
88 | ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y) |
89 | prepare: stack_protector_prepare | |
90 | stack_protector_prepare: prepare0 | |
91 | $(eval KBUILD_CFLAGS += -mstack-protector-guard=tls \ | |
92 | -mstack-protector-guard-reg=tp \ | |
93 | -mstack-protector-guard-offset=$(shell \ | |
94 | awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}' \ | |
95 | include/generated/asm-offsets.h)) | |
96 | endif | |
97 | ||
889d746e LVO |
98 | # arch specific predefines for sparse |
99 | CHECKFLAGS += -D__riscv -D__riscv_xlen=$(BITS) | |
100 | ||
c0fbcd99 AP |
101 | # Default target when executing plain make |
102 | boot := arch/riscv/boot | |
44c92257 VW |
103 | ifeq ($(CONFIG_XIP_KERNEL),y) |
104 | KBUILD_IMAGE := $(boot)/xipImage | |
105 | else | |
c0fbcd99 | 106 | KBUILD_IMAGE := $(boot)/Image.gz |
44c92257 | 107 | endif |
c0fbcd99 | 108 | |
fbe934d6 PD |
109 | head-y := arch/riscv/kernel/head.o |
110 | ||
fbe934d6 | 111 | libs-y += arch/riscv/lib/ |
d7071743 | 112 | libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a |
fbe934d6 | 113 | |
f157d411 DA |
114 | PHONY += vdso_install |
115 | vdso_install: | |
116 | $(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso $@ | |
0715372a | 117 | $(if $(CONFIG_COMPAT),$(Q)$(MAKE) \ |
88bd24d7 | 118 | $(build)=arch/riscv/kernel/compat_vdso compat_$@) |
f157d411 | 119 | |
5a19c7e0 | 120 | ifeq ($(KBUILD_EXTMOD),) |
a290f510 | 121 | ifeq ($(CONFIG_MMU),y) |
fde9c59a SA |
122 | prepare: vdso_prepare |
123 | vdso_prepare: prepare0 | |
124 | $(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso include/generated/vdso-offsets.h | |
0715372a GR |
125 | $(if $(CONFIG_COMPAT),$(Q)$(MAKE) \ |
126 | $(build)=arch/riscv/kernel/compat_vdso include/generated/compat_vdso-offsets.h) | |
127 | ||
a290f510 | 128 | endif |
5a19c7e0 | 129 | endif |
fde9c59a | 130 | |
44c92257 | 131 | ifneq ($(CONFIG_XIP_KERNEL),y) |
08734e05 | 132 | ifeq ($(CONFIG_RISCV_M_MODE)$(CONFIG_SOC_CANAAN),yy) |
37809df4 | 133 | KBUILD_IMAGE := $(boot)/loader.bin |
405fe7aa CH |
134 | else |
135 | KBUILD_IMAGE := $(boot)/Image.gz | |
136 | endif | |
44c92257 VW |
137 | endif |
138 | BOOT_TARGETS := Image Image.gz loader loader.bin xipImage | |
c0fbcd99 | 139 | |
405fe7aa | 140 | all: $(notdir $(KBUILD_IMAGE)) |
c0fbcd99 | 141 | |
405fe7aa | 142 | $(BOOT_TARGETS): vmlinux |
c0fbcd99 | 143 | $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ |
405fe7aa | 144 | @$(kecho) ' Kernel: $(boot)/$@ is ready' |
c0fbcd99 | 145 | |
c18d7c17 KW |
146 | Image.%: Image |
147 | $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ | |
148 | ||
f774f5bb MY |
149 | install: KBUILD_IMAGE := $(boot)/Image |
150 | zinstall: KBUILD_IMAGE := $(boot)/Image.gz | |
399c1ec8 | 151 | install zinstall: |
f774f5bb | 152 | $(call cmd,install) |
2c42bcbb | 153 | |
5d4595db RD |
154 | PHONY += rv32_randconfig |
155 | rv32_randconfig: | |
156 | $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/riscv/configs/32-bit.config \ | |
157 | -f $(srctree)/Makefile randconfig | |
158 | ||
159 | PHONY += rv64_randconfig | |
160 | rv64_randconfig: | |
161 | $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/riscv/configs/64-bit.config \ | |
162 | -f $(srctree)/Makefile randconfig | |
72f045d1 GR |
163 | |
164 | PHONY += rv32_defconfig | |
165 | rv32_defconfig: | |
166 | $(Q)$(MAKE) -f $(srctree)/Makefile defconfig 32-bit.config |