1 # This file is included by the global makefile so that you can add your own
2 # architecture-specific flags and dependencies.
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
9 OBJCOPYFLAGS := -O binary
11 ifeq ($(CONFIG_DYNAMIC_FTRACE),y)
12 LDFLAGS_vmlinux := --no-relax
13 KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY
14 CC_FLAGS_FTRACE := -fpatchable-function-entry=8
17 ifeq ($(CONFIG_CMODEL_MEDLOW),y)
18 KBUILD_CFLAGS_MODULE += -mcmodel=medany
22 ifeq ($(CONFIG_ARCH_RV64I),y)
24 UTS_MACHINE := riscv64
26 KBUILD_CFLAGS += -mabi=lp64
27 KBUILD_AFLAGS += -mabi=lp64
29 KBUILD_LDFLAGS += -melf64lriscv
32 UTS_MACHINE := riscv32
34 KBUILD_CFLAGS += -mabi=ilp32
35 KBUILD_AFLAGS += -mabi=ilp32
36 KBUILD_LDFLAGS += -melf32lriscv
39 ifeq ($(CONFIG_LD_IS_LLD),y)
40 ifeq ($(shell test $(CONFIG_LLD_VERSION) -lt 150000; echo $$?),0)
41 KBUILD_CFLAGS += -mno-relax
42 KBUILD_AFLAGS += -mno-relax
43 ifndef CONFIG_AS_IS_LLVM
44 KBUILD_CFLAGS += -Wa,-mno-relax
45 KBUILD_AFLAGS += -Wa,-mno-relax
51 riscv-march-$(CONFIG_ARCH_RV32I) := rv32ima
52 riscv-march-$(CONFIG_ARCH_RV64I) := rv64ima
53 riscv-march-$(CONFIG_FPU) := $(riscv-march-y)fd
54 riscv-march-y := $(subst imafd,g,$(riscv-march-y))
55 riscv-march-$(CONFIG_RISCV_ISA_C) := $(riscv-march-y)c
57 # Newer binutils versions default to ISA spec version 20191213 which moves some
58 # instructions from the I extension to the Zicsr and Zifencei extensions.
59 toolchain-need-zicsr-zifencei := $(call cc-option-yn, -march=$(riscv-march-y)_zicsr_zifencei)
60 riscv-march-$(toolchain-need-zicsr-zifencei) := $(riscv-march-y)_zicsr_zifencei
62 # Check if the toolchain supports Zicbom extension
63 riscv-march-$(CONFIG_TOOLCHAIN_HAS_ZICBOM) := $(riscv-march-y)_zicbom
65 # Check if the toolchain supports Zihintpause extension
66 riscv-march-$(CONFIG_TOOLCHAIN_HAS_ZIHINTPAUSE) := $(riscv-march-y)_zihintpause
68 KBUILD_CFLAGS += -march=$(subst fd,,$(riscv-march-y))
69 KBUILD_AFLAGS += -march=$(riscv-march-y)
71 KBUILD_CFLAGS += -mno-save-restore
72 KBUILD_CFLAGS += -DCONFIG_PAGE_OFFSET=$(CONFIG_PAGE_OFFSET)
74 ifeq ($(CONFIG_CMODEL_MEDLOW),y)
75 KBUILD_CFLAGS += -mcmodel=medlow
77 ifeq ($(CONFIG_CMODEL_MEDANY),y)
78 KBUILD_CFLAGS += -mcmodel=medany
80 ifeq ($(CONFIG_PERF_EVENTS),y)
81 KBUILD_CFLAGS += -fno-omit-frame-pointer
84 KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax)
85 KBUILD_AFLAGS_MODULE += $(call as-option,-Wa$(comma)-mno-relax)
87 # GCC versions that support the "-mstrict-align" option default to allowing
88 # unaligned accesses. While unaligned accesses are explicitly allowed in the
89 # RISC-V ISA, they're emulated by machine mode traps on all extant
90 # architectures. It's faster to have GCC emit only aligned accesses.
91 KBUILD_CFLAGS += $(call cc-option,-mstrict-align)
93 ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y)
94 prepare: stack_protector_prepare
95 stack_protector_prepare: prepare0
96 $(eval KBUILD_CFLAGS += -mstack-protector-guard=tls \
97 -mstack-protector-guard-reg=tp \
98 -mstack-protector-guard-offset=$(shell \
99 awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}' \
100 include/generated/asm-offsets.h))
103 # arch specific predefines for sparse
104 CHECKFLAGS += -D__riscv -D__riscv_xlen=$(BITS)
106 # Default target when executing plain make
107 boot := arch/riscv/boot
108 ifeq ($(CONFIG_XIP_KERNEL),y)
109 KBUILD_IMAGE := $(boot)/xipImage
111 KBUILD_IMAGE := $(boot)/Image.gz
114 libs-y += arch/riscv/lib/
115 libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
117 PHONY += vdso_install
119 $(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso $@
120 $(if $(CONFIG_COMPAT),$(Q)$(MAKE) \
121 $(build)=arch/riscv/kernel/compat_vdso compat_$@)
123 ifeq ($(KBUILD_EXTMOD),)
124 ifeq ($(CONFIG_MMU),y)
125 prepare: vdso_prepare
126 vdso_prepare: prepare0
127 $(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso include/generated/vdso-offsets.h
128 $(if $(CONFIG_COMPAT),$(Q)$(MAKE) \
129 $(build)=arch/riscv/kernel/compat_vdso include/generated/compat_vdso-offsets.h)
134 ifneq ($(CONFIG_XIP_KERNEL),y)
135 ifeq ($(CONFIG_RISCV_M_MODE)$(CONFIG_SOC_CANAAN),yy)
136 KBUILD_IMAGE := $(boot)/loader.bin
138 ifeq ($(CONFIG_EFI_ZBOOT),)
139 KBUILD_IMAGE := $(boot)/Image.gz
141 KBUILD_IMAGE := $(boot)/vmlinuz.efi
145 BOOT_TARGETS := Image Image.gz loader loader.bin xipImage vmlinuz.efi
147 all: $(notdir $(KBUILD_IMAGE))
149 $(BOOT_TARGETS): vmlinux
150 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
151 @$(kecho) ' Kernel: $(boot)/$@ is ready'
154 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
156 install: KBUILD_IMAGE := $(boot)/Image
157 zinstall: KBUILD_IMAGE := $(boot)/Image.gz
161 PHONY += rv32_randconfig
163 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/riscv/configs/32-bit.config \
164 -f $(srctree)/Makefile randconfig
166 PHONY += rv64_randconfig
168 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/riscv/configs/64-bit.config \
169 -f $(srctree)/Makefile randconfig
171 PHONY += rv32_defconfig
173 $(Q)$(MAKE) -f $(srctree)/Makefile defconfig 32-bit.config