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 ($(CONFIG_DYNAMIC_FTRACE),y) 14 LDFLAGS_vmlinux := --no-relax 15endif 16KBUILD_AFLAGS_MODULE += -fPIC 17KBUILD_CFLAGS_MODULE += -fPIC 18 19KBUILD_DEFCONFIG = defconfig 20 21export BITS 22ifeq ($(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 39KBUILD_CFLAGS += -Wall 40 41# ISA string setting 42riscv-march-$(CONFIG_ARCH_RV32I) := rv32im 43riscv-march-$(CONFIG_ARCH_RV64I) := rv64im 44riscv-march-$(CONFIG_RISCV_ISA_A) := $(riscv-march-y)a 45riscv-march-$(CONFIG_FPU) := $(riscv-march-y)fd 46riscv-march-$(CONFIG_RISCV_ISA_C) := $(riscv-march-y)c 47KBUILD_CFLAGS += -march=$(subst fd,,$(riscv-march-y)) 48KBUILD_AFLAGS += -march=$(riscv-march-y) 49 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 ($(CONFIG_CMODEL_MEDANY),y) 57 KBUILD_CFLAGS += -mcmodel=medany 58endif 59ifeq ($(CONFIG_MODULE_SECTIONS),y) 60 KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/riscv/kernel/module.lds 61endif 62 63KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax) 64 65# GCC versions that support the "-mstrict-align" option default to allowing 66# unaligned accesses. While unaligned accesses are explicitly allowed in the 67# RISC-V ISA, they're emulated by machine mode traps on all extant 68# architectures. It's faster to have GCC emit only aligned accesses. 69KBUILD_CFLAGS += $(call cc-option,-mstrict-align) 70 71# arch specific predefines for sparse 72CHECKFLAGS += -D__riscv -D__riscv_xlen=$(BITS) 73 74# Default target when executing plain make 75boot := arch/riscv/boot 76KBUILD_IMAGE := $(boot)/Image.gz 77 78head-y := arch/riscv/kernel/head.o 79 80core-y += arch/riscv/kernel/ arch/riscv/mm/ 81 82libs-y += arch/riscv/lib/ 83 84PHONY += vdso_install 85vdso_install: 86 $(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso $@ 87 88all: Image.gz 89 90Image: vmlinux 91 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 92 93Image.%: Image 94 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 95 96zinstall install: 97 $(Q)$(MAKE) $(build)=$(boot) $@ 98