| # This file is included by the global makefile so that you can add your own |
| # architecture-specific flags and dependencies. |
| # |
| # 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 |
| ifndef CONFIG_AS_IS_LLVM |
| KBUILD_CFLAGS += -Wa,-mno-relax |
| KBUILD_AFLAGS += -Wa,-mno-relax |
| endif |
| endif |
| |
| # ISA string setting |
| riscv-march-$(CONFIG_ARCH_RV32I) := rv32ima |
| riscv-march-$(CONFIG_ARCH_RV64I) := rv64ima |
| riscv-march-$(CONFIG_FPU) := $(riscv-march-y)fd |
| riscv-march-$(CONFIG_RISCV_ISA_C) := $(riscv-march-y)c |
| |
| # 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) := $(riscv-march-y)_zicsr_zifencei |
| |
| KBUILD_CFLAGS += -march=$(subst fd,,$(riscv-march-y)) |
| KBUILD_AFLAGS += -march=$(riscv-march-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 += $(call cc-option,-mstrict-align) |
| |
| ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y) |
| prepare: stack_protector_prepare |
| stack_protector_prepare: prepare0 |
| $(eval KBUILD_CFLAGS += -mstack-protector-guard=tls \ |
| -mstack-protector-guard-reg=tp \ |
| -mstack-protector-guard-offset=$(shell \ |
| awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}' \ |
| include/generated/asm-offsets.h)) |
| endif |
| |
| # arch specific predefines for sparse |
| CHECKFLAGS += -D__riscv -D__riscv_xlen=$(BITS) |
| |
| # Default target when executing plain make |
| boot := arch/riscv/boot |
| ifeq ($(CONFIG_XIP_KERNEL),y) |
| KBUILD_IMAGE := $(boot)/xipImage |
| else |
| KBUILD_IMAGE := $(boot)/Image.gz |
| endif |
| |
| head-y := arch/riscv/kernel/head.o |
| |
| libs-y += arch/riscv/lib/ |
| libs-$(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) \ |
| $(build)=arch/riscv/kernel/compat_vdso include/generated/compat_vdso-offsets.h) |
| |
| endif |
| endif |
| |
| ifneq ($(CONFIG_XIP_KERNEL),y) |
| ifeq ($(CONFIG_RISCV_M_MODE)$(CONFIG_SOC_CANAAN),yy) |
| KBUILD_IMAGE := $(boot)/loader.bin |
| else |
| KBUILD_IMAGE := $(boot)/Image.gz |
| endif |
| endif |
| BOOT_TARGETS := Image Image.gz loader loader.bin xipImage |
| |
| all: $(notdir $(KBUILD_IMAGE)) |
| |
| $(BOOT_TARGETS): vmlinux |
| $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ |
| @$(kecho) ' Kernel: $(boot)/$@ is ready' |
| |
| Image.%: Image |
| $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ |
| |
| install: KBUILD_IMAGE := $(boot)/Image |
| zinstall: KBUILD_IMAGE := $(boot)/Image.gz |
| install zinstall: |
| $(call cmd,install) |
| |
| PHONY += rv32_randconfig |
| rv32_randconfig: |
| $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/riscv/configs/32-bit.config \ |
| -f $(srctree)/Makefile randconfig |
| |
| PHONY += rv64_randconfig |
| rv64_randconfig: |
| $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/riscv/configs/64-bit.config \ |
| -f $(srctree)/Makefile randconfig |
| |
| PHONY += rv32_defconfig |
| rv32_defconfig: |
| $(Q)$(MAKE) -f $(srctree)/Makefile defconfig 32-bit.config |