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 := 14KBUILD_AFLAGS_MODULE += -fPIC 15KBUILD_CFLAGS_MODULE += -fPIC 16 17KBUILD_DEFCONFIG = defconfig 18 19export BITS 20ifeq ($(CONFIG_ARCH_RV64I),y) 21 BITS := 64 22 UTS_MACHINE := riscv64 23 24 KBUILD_CFLAGS += -mabi=lp64 25 KBUILD_AFLAGS += -mabi=lp64 26 KBUILD_MARCH = rv64im 27 LDFLAGS += -melf64lriscv 28else 29 BITS := 32 30 UTS_MACHINE := riscv32 31 32 KBUILD_CFLAGS += -mabi=ilp32 33 KBUILD_AFLAGS += -mabi=ilp32 34 KBUILD_MARCH = rv32im 35 LDFLAGS += -melf32lriscv 36endif 37 38KBUILD_CFLAGS += -Wall 39 40ifeq ($(CONFIG_RISCV_ISA_A),y) 41 KBUILD_ARCH_A = a 42endif 43ifeq ($(CONFIG_RISCV_ISA_C),y) 44 KBUILD_ARCH_C = c 45endif 46 47KBUILD_AFLAGS += -march=$(KBUILD_MARCH)$(KBUILD_ARCH_A)fd$(KBUILD_ARCH_C) 48 49KBUILD_CFLAGS += -march=$(KBUILD_MARCH)$(KBUILD_ARCH_A)$(KBUILD_ARCH_C) 50KBUILD_CFLAGS += -mno-save-restore 51KBUILD_CFLAGS += -DCONFIG_PAGE_OFFSET=$(CONFIG_PAGE_OFFSET) 52 53ifeq ($(CONFIG_CMODEL_MEDLOW),y) 54 KBUILD_CFLAGS += -mcmodel=medlow 55endif 56ifeq ($(CONFIG_CMODEL_MEDANY),y) 57 KBUILD_CFLAGS += -mcmodel=medany 58endif 59 60# GCC versions that support the "-mstrict-align" option default to allowing 61# unaligned accesses. While unaligned accesses are explicitly allowed in the 62# RISC-V ISA, they're emulated by machine mode traps on all extant 63# architectures. It's faster to have GCC emit only aligned accesses. 64KBUILD_CFLAGS += $(call cc-option,-mstrict-align) 65 66head-y := arch/riscv/kernel/head.o 67 68core-y += arch/riscv/kernel/ arch/riscv/mm/ 69 70libs-y += arch/riscv/lib/ 71 72all: vmlinux 73