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-$(CONFIG_ARCH_RV32I) := rv32ima 43riscv-march-$(CONFIG_ARCH_RV64I) := rv64ima 44riscv-march-$(CONFIG_FPU) := $(riscv-march-y)fd 45riscv-march-$(CONFIG_RISCV_ISA_C) := $(riscv-march-y)c 46KBUILD_CFLAGS += -march=$(subst fd,,$(riscv-march-y)) 47KBUILD_AFLAGS += -march=$(riscv-march-y) 48 49KBUILD_CFLAGS += -mno-save-restore 50KBUILD_CFLAGS += -DCONFIG_PAGE_OFFSET=$(CONFIG_PAGE_OFFSET) 51 52ifeq ($(CONFIG_CMODEL_MEDLOW),y) 53 KBUILD_CFLAGS += -mcmodel=medlow 54endif 55ifeq ($(CONFIG_CMODEL_MEDANY),y) 56 KBUILD_CFLAGS += -mcmodel=medany 57endif 58ifeq ($(CONFIG_MODULE_SECTIONS),y) 59 KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/riscv/kernel/module.lds 60endif 61 62KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax) 63 64# GCC versions that support the "-mstrict-align" option default to allowing 65# unaligned accesses. While unaligned accesses are explicitly allowed in the 66# RISC-V ISA, they're emulated by machine mode traps on all extant 67# architectures. It's faster to have GCC emit only aligned accesses. 68KBUILD_CFLAGS += $(call cc-option,-mstrict-align) 69 70# arch specific predefines for sparse 71CHECKFLAGS += -D__riscv -D__riscv_xlen=$(BITS) 72 73# Default target when executing plain make 74boot := arch/riscv/boot 75KBUILD_IMAGE := $(boot)/Image.gz 76 77head-y := arch/riscv/kernel/head.o 78 79core-y += arch/riscv/kernel/ arch/riscv/mm/ arch/riscv/net/ 80 81libs-y += arch/riscv/lib/ 82 83PHONY += vdso_install 84vdso_install: 85 $(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso $@ 86 87all: Image.gz 88 89Image: vmlinux 90 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 91 92Image.%: Image 93 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 94 95zinstall install: 96 $(Q)$(MAKE) $(build)=$(boot) $@ 97