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- # This file is included by the global makefile so that you can add your own
- # architecture-specific flags and dependencies. Remember to do have actions
- # for "archclean" and "archdep" for cleaning up and making dependencies for
- # this architecture
- #
- # This file is subject to the terms and conditions of the GNU General Public
- # License. See the file "COPYING" in the main directory of this archive
- # for more details.
- #
- OBJCOPYFLAGS := -O binary
- LDFLAGS_vmlinux :=
- ifeq ($(CONFIG_DYNAMIC_FTRACE),y)
- LDFLAGS_vmlinux := --no-relax
- KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY
- CC_FLAGS_FTRACE := -fpatchable-function-entry=8
- endif
- ifeq ($(CONFIG_CMODEL_MEDLOW),y)
- KBUILD_CFLAGS_MODULE += -mcmodel=medany
- endif
- export BITS
- ifeq ($(CONFIG_ARCH_RV64I),y)
- BITS := 64
- UTS_MACHINE := riscv64
- KBUILD_CFLAGS += -mabi=lp64
- KBUILD_AFLAGS += -mabi=lp64
- KBUILD_LDFLAGS += -melf64lriscv
- else
- BITS := 32
- UTS_MACHINE := riscv32
- KBUILD_CFLAGS += -mabi=ilp32
- KBUILD_AFLAGS += -mabi=ilp32
- KBUILD_LDFLAGS += -melf32lriscv
- endif
- ifeq ($(CONFIG_LD_IS_LLD),y)
- KBUILD_CFLAGS += -mno-relax
- KBUILD_AFLAGS += -mno-relax
- ifneq ($(LLVM_IAS),1)
- KBUILD_CFLAGS += -Wa,-mno-relax
- KBUILD_AFLAGS += -Wa,-mno-relax
- endif
- endif
- # ISA string setting
- # Newer binutils versions default to ISA spec version 20191213 which moves some
- # instructions from the I extension to the Zicsr and Zifencei extensions.
- toolchain-need-zicsr-zifencei := $(call cc-option-yn, -march=$(riscv-march-y)_zicsr_zifencei)
- riscv-march-$(toolchain-need-zicsr-zifencei) := $(riscv-march-y)_zicsr_zifencei
- riscv-march-cflags-$(CONFIG_ARCH_RV32I) := rv32ima
- riscv-march-cflags-$(CONFIG_ARCH_RV64I) := rv64ima
- riscv-march-cflags-$(CONFIG_RISCV_ISA_C) := $(riscv-march-cflags-y)c
- riscv-march-aflags-$(CONFIG_ARCH_RV32I) := rv32ima
- riscv-march-aflags-$(CONFIG_ARCH_RV64I) := rv64ima
- riscv-march-aflags-$(CONFIG_FPU) := $(riscv-march-aflags-y)fd
- riscv-march-aflags-$(CONFIG_RISCV_ISA_C) := $(riscv-march-aflags-y)c
- riscv-march-aflags-$(CONFIG_VECTOR_1_0) := $(riscv-march-aflags-y)v
- riscv-march-aflags-$(CONFIG_VECTOR_0_7) := $(riscv-march-aflags-y)v0p7
- riscv-march-aflags-$(CONFIG_THEAD_ISA) := $(riscv-march-aflags-y)_xtheadc
- KBUILD_CFLAGS += -march=$(riscv-march-cflags-y) -Wa,-march=$(riscv-march-aflags-y)
- KBUILD_AFLAGS += -march=$(riscv-march-aflags-y)
- KBUILD_CFLAGS += -mno-save-restore
- KBUILD_CFLAGS += -DCONFIG_PAGE_OFFSET=$(CONFIG_PAGE_OFFSET)
- ifeq ($(CONFIG_CMODEL_MEDLOW),y)
- KBUILD_CFLAGS += -mcmodel=medlow
- endif
- ifeq ($(CONFIG_CMODEL_MEDANY),y)
- KBUILD_CFLAGS += -mcmodel=medany
- endif
- ifeq ($(CONFIG_PERF_EVENTS),y)
- KBUILD_CFLAGS += -fno-omit-frame-pointer
- endif
- KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax)
- # GCC versions that support the "-mstrict-align" option default to allowing
- # unaligned accesses. While unaligned accesses are explicitly allowed in the
- # RISC-V ISA, they're emulated by machine mode traps on all extant
- # architectures. It's faster to have GCC emit only aligned accesses.
- KBUILD_CFLAGS += $(call cc-option,-mstrict-align)
- # arch specific predefines for sparse
- CHECKFLAGS += -D__riscv -D__riscv_xlen=$(BITS)
- # Default target when executing plain make
- boot := arch/riscv/boot
- KBUILD_IMAGE := $(boot)/Image.gz
- head-y := arch/riscv/kernel/head.o
- core-y += arch/riscv/
- core-$(CONFIG_KVM) += arch/riscv/kvm/
- libs-y += arch/riscv/lib/
- libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
- PHONY += vdso_install
- vdso_install:
- $(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso $@
- $(if $(CONFIG_COMPAT),$(Q)$(MAKE) \
- $(build)=arch/riscv/kernel/compat_vdso $@)
- ifeq ($(KBUILD_EXTMOD),)
- ifeq ($(CONFIG_MMU),y)
- prepare: vdso_prepare
- vdso_prepare: prepare0
- $(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso include/generated/vdso-offsets.h
- $(if $(CONFIG_COMPAT),$(Q)$(MAKE) \
- $(build)=arch/riscv/kernel/compat_vdso include/generated/compat_vdso-offsets.h)
- endif
- endif
- ifeq ($(CONFIG_RISCV_M_MODE)$(CONFIG_SOC_KENDRYTE),yy)
- KBUILD_IMAGE := $(boot)/loader.bin
- else
- KBUILD_IMAGE := $(boot)/Image.gz
- endif
- BOOT_TARGETS := Image Image.gz loader loader.bin
- all: $(notdir $(KBUILD_IMAGE))
- $(BOOT_TARGETS): vmlinux
- $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
- @$(kecho) ' Kernel: $(boot)/$@ is ready'
- zinstall install:
- $(Q)$(MAKE) $(build)=$(boot) $@
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