1# This file is included by the global makefile so that you can add your own 2# architecture-specific flags and dependencies. Remember to do have actions 3# for "archclean" and "archdep" for cleaning up and making dependencies for 4# this architecture 5# 6# This file is subject to the terms and conditions of the GNU General Public 7# License. See the file "COPYING" in the main directory of this archive 8# for more details. 9# 10 11OBJCOPYFLAGS := -O binary 12LDFLAGS_vmlinux := 13ifeq ($(CONFIG_DYNAMIC_FTRACE),y) 14 LDFLAGS_vmlinux := --no-relax 15endif 16 17ifeq ($(CONFIG_CMODEL_MEDLOW),y) 18KBUILD_CFLAGS_MODULE += -mcmodel=medany 19endif 20 21export BITS 22ifeq ($(CONFIG_ARCH_RV64I),y) 23 BITS := 64 24 UTS_MACHINE := riscv64 25 26 KBUILD_CFLAGS += -mabi=lp64 27 KBUILD_AFLAGS += -mabi=lp64 28 29 KBUILD_LDFLAGS += -melf64lriscv 30else 31 BITS := 32 32 UTS_MACHINE := riscv32 33 34 KBUILD_CFLAGS += -mabi=ilp32 35 KBUILD_AFLAGS += -mabi=ilp32 36 KBUILD_LDFLAGS += -melf32lriscv 37endif 38 39ifeq ($(CONFIG_LD_IS_LLD),y) 40ifeq ($(shell test $(CONFIG_LLD_VERSION) -lt 150000; echo $$?),0) 41 KBUILD_CFLAGS += -mno-relax 42 KBUILD_AFLAGS += -mno-relax 43ifndef CONFIG_AS_IS_LLVM 44 KBUILD_CFLAGS += -Wa,-mno-relax 45 KBUILD_AFLAGS += -Wa,-mno-relax 46endif 47endif 48endif 49 50# ISA string setting 51riscv-march-$(CONFIG_ARCH_RV32I) := rv32ima 52riscv-march-$(CONFIG_ARCH_RV64I) := rv64ima 53riscv-march-$(CONFIG_FPU) := $(riscv-march-y)fd 54riscv-march-$(CONFIG_RISCV_ISA_C) := $(riscv-march-y)c 55 56ifdef CONFIG_TOOLCHAIN_NEEDS_OLD_ISA_SPEC 57KBUILD_CFLAGS += -Wa,-misa-spec=2.2 58KBUILD_AFLAGS += -Wa,-misa-spec=2.2 59else 60riscv-march-$(CONFIG_TOOLCHAIN_NEEDS_EXPLICIT_ZICSR_ZIFENCEI) := $(riscv-march-y)_zicsr_zifencei 61endif 62 63KBUILD_CFLAGS += -march=$(subst fd,,$(riscv-march-y)) 64KBUILD_AFLAGS += -march=$(riscv-march-y) 65 66KBUILD_CFLAGS += -mno-save-restore 67KBUILD_CFLAGS += -DCONFIG_PAGE_OFFSET=$(CONFIG_PAGE_OFFSET) 68 69ifeq ($(CONFIG_CMODEL_MEDLOW),y) 70 KBUILD_CFLAGS += -mcmodel=medlow 71endif 72ifeq ($(CONFIG_CMODEL_MEDANY),y) 73 KBUILD_CFLAGS += -mcmodel=medany 74endif 75ifeq ($(CONFIG_PERF_EVENTS),y) 76 KBUILD_CFLAGS += -fno-omit-frame-pointer 77endif 78 79# Avoid generating .eh_frame sections. 80KBUILD_CFLAGS += -fno-asynchronous-unwind-tables -fno-unwind-tables 81 82KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax) 83KBUILD_AFLAGS_MODULE += $(call as-option,-Wa$(comma)-mno-relax) 84 85# GCC versions that support the "-mstrict-align" option default to allowing 86# unaligned accesses. While unaligned accesses are explicitly allowed in the 87# RISC-V ISA, they're emulated by machine mode traps on all extant 88# architectures. It's faster to have GCC emit only aligned accesses. 89KBUILD_CFLAGS += $(call cc-option,-mstrict-align) 90 91# arch specific predefines for sparse 92CHECKFLAGS += -D__riscv -D__riscv_xlen=$(BITS) 93 94# Default target when executing plain make 95boot := arch/riscv/boot 96KBUILD_IMAGE := $(boot)/Image.gz 97 98head-y := arch/riscv/kernel/head.o 99 100core-y += arch/riscv/ 101 102libs-y += arch/riscv/lib/ 103libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a 104 105PHONY += vdso_install 106vdso_install: 107 $(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso $@ 108 109prepare: vdso_prepare 110vdso_prepare: prepare0 111 $(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso include/generated/vdso-offsets.h 112 113ifeq ($(CONFIG_RISCV_M_MODE)$(CONFIG_SOC_CANAAN),yy) 114KBUILD_IMAGE := $(boot)/loader.bin 115else 116KBUILD_IMAGE := $(boot)/Image.gz 117endif 118BOOT_TARGETS := Image Image.gz loader loader.bin 119 120all: $(notdir $(KBUILD_IMAGE)) 121 122$(BOOT_TARGETS): vmlinux 123 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 124 @$(kecho) ' Kernel: $(boot)/$@ is ready' 125 126zinstall install: 127 $(Q)$(MAKE) $(build)=$(boot) $@ 128