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) 40 KBUILD_CFLAGS += -mno-relax 41 KBUILD_AFLAGS += -mno-relax 42ifneq ($(LLVM_IAS),1) 43 KBUILD_CFLAGS += -Wa,-mno-relax 44 KBUILD_AFLAGS += -Wa,-mno-relax 45endif 46endif 47 48# ISA string setting 49riscv-march-$(CONFIG_ARCH_RV32I) := rv32ima 50riscv-march-$(CONFIG_ARCH_RV64I) := rv64ima 51riscv-march-$(CONFIG_FPU) := $(riscv-march-y)fd 52riscv-march-$(CONFIG_RISCV_ISA_C) := $(riscv-march-y)c 53KBUILD_CFLAGS += -march=$(subst fd,,$(riscv-march-y)) 54KBUILD_AFLAGS += -march=$(riscv-march-y) 55 56KBUILD_CFLAGS += -mno-save-restore 57KBUILD_CFLAGS += -DCONFIG_PAGE_OFFSET=$(CONFIG_PAGE_OFFSET) 58 59ifeq ($(CONFIG_CMODEL_MEDLOW),y) 60 KBUILD_CFLAGS += -mcmodel=medlow 61endif 62ifeq ($(CONFIG_CMODEL_MEDANY),y) 63 KBUILD_CFLAGS += -mcmodel=medany 64endif 65ifeq ($(CONFIG_PERF_EVENTS),y) 66 KBUILD_CFLAGS += -fno-omit-frame-pointer 67endif 68 69KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax) 70 71# GCC versions that support the "-mstrict-align" option default to allowing 72# unaligned accesses. While unaligned accesses are explicitly allowed in the 73# RISC-V ISA, they're emulated by machine mode traps on all extant 74# architectures. It's faster to have GCC emit only aligned accesses. 75KBUILD_CFLAGS += $(call cc-option,-mstrict-align) 76 77# arch specific predefines for sparse 78CHECKFLAGS += -D__riscv -D__riscv_xlen=$(BITS) 79 80# Default target when executing plain make 81boot := arch/riscv/boot 82KBUILD_IMAGE := $(boot)/Image.gz 83 84head-y := arch/riscv/kernel/head.o 85 86core-y += arch/riscv/ 87 88libs-y += arch/riscv/lib/ 89libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a 90 91PHONY += vdso_install 92vdso_install: 93 $(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso $@ 94 95ifeq ($(CONFIG_RISCV_M_MODE)$(CONFIG_SOC_KENDRYTE),yy) 96KBUILD_IMAGE := $(boot)/loader.bin 97else 98KBUILD_IMAGE := $(boot)/Image.gz 99endif 100BOOT_TARGETS := Image Image.gz loader loader.bin 101 102all: $(notdir $(KBUILD_IMAGE)) 103 104$(BOOT_TARGETS): vmlinux 105 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 106 @$(kecho) ' Kernel: $(boot)/$@ is ready' 107 108zinstall install: 109 $(Q)$(MAKE) $(build)=$(boot) $@ 110