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 ($(CONFIG_DYNAMIC_FTRACE),y) 14 LDFLAGS_vmlinux := --no-relax 15endif 16KBUILD_AFLAGS_MODULE += -fPIC 17KBUILD_CFLAGS_MODULE += -fPIC 18 19export BITS 20ifeq ($(CONFIG_ARCH_RV64I),y) 21 BITS := 64 22 UTS_MACHINE := riscv64 23 24 KBUILD_CFLAGS += -mabi=lp64 25 KBUILD_AFLAGS += -mabi=lp64 26 27 KBUILD_LDFLAGS += -melf64lriscv 28else 29 BITS := 32 30 UTS_MACHINE := riscv32 31 32 KBUILD_CFLAGS += -mabi=ilp32 33 KBUILD_AFLAGS += -mabi=ilp32 34 KBUILD_LDFLAGS += -melf32lriscv 35endif 36 37# ISA string setting 38riscv-march-$(CONFIG_ARCH_RV32I) := rv32ima 39riscv-march-$(CONFIG_ARCH_RV64I) := rv64ima 40riscv-march-$(CONFIG_FPU) := $(riscv-march-y)fd 41riscv-march-$(CONFIG_RISCV_ISA_C) := $(riscv-march-y)c 42KBUILD_CFLAGS += -march=$(subst fd,,$(riscv-march-y)) 43KBUILD_AFLAGS += -march=$(riscv-march-y) 44 45KBUILD_CFLAGS += -mno-save-restore 46KBUILD_CFLAGS += -DCONFIG_PAGE_OFFSET=$(CONFIG_PAGE_OFFSET) 47 48ifeq ($(CONFIG_CMODEL_MEDLOW),y) 49 KBUILD_CFLAGS += -mcmodel=medlow 50endif 51ifeq ($(CONFIG_CMODEL_MEDANY),y) 52 KBUILD_CFLAGS += -mcmodel=medany 53endif 54ifeq ($(CONFIG_MODULE_SECTIONS),y) 55 KBUILD_LDS_MODULE += $(srctree)/arch/riscv/kernel/module.lds 56endif 57ifeq ($(CONFIG_PERF_EVENTS),y) 58 KBUILD_CFLAGS += -fno-omit-frame-pointer 59endif 60 61KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax) 62 63# GCC versions that support the "-mstrict-align" option default to allowing 64# unaligned accesses. While unaligned accesses are explicitly allowed in the 65# RISC-V ISA, they're emulated by machine mode traps on all extant 66# architectures. It's faster to have GCC emit only aligned accesses. 67KBUILD_CFLAGS += $(call cc-option,-mstrict-align) 68 69# arch specific predefines for sparse 70CHECKFLAGS += -D__riscv -D__riscv_xlen=$(BITS) 71 72# Default target when executing plain make 73boot := arch/riscv/boot 74KBUILD_IMAGE := $(boot)/Image.gz 75 76head-y := arch/riscv/kernel/head.o 77 78core-y += arch/riscv/ 79 80libs-y += arch/riscv/lib/ 81 82PHONY += vdso_install 83vdso_install: 84 $(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso $@ 85 86all: Image.gz 87 88Image: vmlinux 89 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 90 91Image.%: Image 92 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 93 94zinstall install: 95 $(Q)$(MAKE) $(build)=$(boot) $@ 96