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 11LDFLAGS := 12OBJCOPYFLAGS := -O binary 13LDFLAGS_vmlinux := 14ifeq ($(CONFIG_DYNAMIC_FTRACE),y) 15 LDFLAGS_vmlinux := --no-relax 16endif 17KBUILD_AFLAGS_MODULE += -fPIC 18KBUILD_CFLAGS_MODULE += -fPIC 19 20KBUILD_DEFCONFIG = defconfig 21 22export BITS 23ifeq ($(CONFIG_ARCH_RV64I),y) 24 BITS := 64 25 UTS_MACHINE := riscv64 26 27 KBUILD_CFLAGS += -mabi=lp64 28 KBUILD_AFLAGS += -mabi=lp64 29 KBUILD_MARCH = rv64im 30 LDFLAGS += -melf64lriscv 31else 32 BITS := 32 33 UTS_MACHINE := riscv32 34 35 KBUILD_CFLAGS += -mabi=ilp32 36 KBUILD_AFLAGS += -mabi=ilp32 37 KBUILD_MARCH = rv32im 38 LDFLAGS += -melf32lriscv 39endif 40 41KBUILD_CFLAGS += -Wall 42 43ifeq ($(CONFIG_RISCV_ISA_A),y) 44 KBUILD_ARCH_A = a 45endif 46ifeq ($(CONFIG_RISCV_ISA_C),y) 47 KBUILD_ARCH_C = c 48endif 49 50KBUILD_AFLAGS += -march=$(KBUILD_MARCH)$(KBUILD_ARCH_A)fd$(KBUILD_ARCH_C) 51 52KBUILD_CFLAGS += -march=$(KBUILD_MARCH)$(KBUILD_ARCH_A)$(KBUILD_ARCH_C) 53KBUILD_CFLAGS += -mno-save-restore 54KBUILD_CFLAGS += -DCONFIG_PAGE_OFFSET=$(CONFIG_PAGE_OFFSET) 55 56ifeq ($(CONFIG_CMODEL_MEDLOW),y) 57 KBUILD_CFLAGS += -mcmodel=medlow 58endif 59ifeq ($(CONFIG_CMODEL_MEDANY),y) 60 KBUILD_CFLAGS += -mcmodel=medany 61endif 62ifeq ($(CONFIG_MODULE_SECTIONS),y) 63 KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/riscv/kernel/module.lds 64endif 65 66KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax) 67 68# GCC versions that support the "-mstrict-align" option default to allowing 69# unaligned accesses. While unaligned accesses are explicitly allowed in the 70# RISC-V ISA, they're emulated by machine mode traps on all extant 71# architectures. It's faster to have GCC emit only aligned accesses. 72KBUILD_CFLAGS += $(call cc-option,-mstrict-align) 73 74# arch specific predefines for sparse 75CHECKFLAGS += -D__riscv -D__riscv_xlen=$(BITS) 76 77head-y := arch/riscv/kernel/head.o 78 79core-y += arch/riscv/kernel/ arch/riscv/mm/ 80 81libs-y += arch/riscv/lib/ 82 83all: vmlinux 84