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 ($(CONFIG_DYNAMIC_FTRACE),y) 14 LDFLAGS_vmlinux := --no-relax 15endif 16 17ifeq ($(CONFIG_64BIT)$(CONFIG_CMODEL_MEDLOW),yy) 18KBUILD_CFLAGS_MODULE += -mcmodel=medany 19endif 20 21export BITS 22ifeq ($(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 39# ISA string setting 40riscv-march-$(CONFIG_ARCH_RV32I) := rv32ima 41riscv-march-$(CONFIG_ARCH_RV64I) := rv64ima 42riscv-march-$(CONFIG_FPU) := $(riscv-march-y)fd 43riscv-march-$(CONFIG_RISCV_ISA_C) := $(riscv-march-y)c 44KBUILD_CFLAGS += -march=$(subst fd,,$(riscv-march-y)) 45KBUILD_AFLAGS += -march=$(riscv-march-y) 46 47KBUILD_CFLAGS += -mno-save-restore 48KBUILD_CFLAGS += -DCONFIG_PAGE_OFFSET=$(CONFIG_PAGE_OFFSET) 49 50ifeq ($(CONFIG_CMODEL_MEDLOW),y) 51 KBUILD_CFLAGS += -mcmodel=medlow 52endif 53ifeq ($(CONFIG_CMODEL_MEDANY),y) 54 KBUILD_CFLAGS += -mcmodel=medany 55endif 56ifeq ($(CONFIG_PERF_EVENTS),y) 57 KBUILD_CFLAGS += -fno-omit-frame-pointer 58endif 59 60KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax) 61 62# GCC versions that support the "-mstrict-align" option default to allowing 63# unaligned accesses. While unaligned accesses are explicitly allowed in the 64# RISC-V ISA, they're emulated by machine mode traps on all extant 65# architectures. It's faster to have GCC emit only aligned accesses. 66KBUILD_CFLAGS += $(call cc-option,-mstrict-align) 67 68# arch specific predefines for sparse 69CHECKFLAGS += -D__riscv -D__riscv_xlen=$(BITS) 70 71# Default target when executing plain make 72boot := arch/riscv/boot 73KBUILD_IMAGE := $(boot)/Image.gz 74 75head-y := arch/riscv/kernel/head.o 76 77core-y += arch/riscv/ 78 79libs-y += arch/riscv/lib/ 80libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a 81 82PHONY += vdso_install 83vdso_install: 84 $(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso $@ 85 86ifeq ($(CONFIG_RISCV_M_MODE)$(CONFIG_SOC_KENDRYTE),yy) 87KBUILD_IMAGE := $(boot)/loader.bin 88else 89KBUILD_IMAGE := $(boot)/Image.gz 90endif 91BOOT_TARGETS := Image Image.gz loader loader.bin 92 93all: $(notdir $(KBUILD_IMAGE)) 94 95$(BOOT_TARGETS): vmlinux 96 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 97 @$(kecho) ' Kernel: $(boot)/$@ is ready' 98 99Image.%: Image 100 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 101 102zinstall install: 103 $(Q)$(MAKE) $(build)=$(boot) $@ 104 105archclean: 106 $(Q)$(MAKE) $(clean)=$(boot) 107