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_MODULE_SECTIONS),y) 57 KBUILD_LDS_MODULE += $(srctree)/arch/riscv/kernel/module.lds 58endif 59ifeq ($(CONFIG_PERF_EVENTS),y) 60 KBUILD_CFLAGS += -fno-omit-frame-pointer 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/ 81 82libs-y += arch/riscv/lib/ 83 84PHONY += vdso_install 85vdso_install: 86 $(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso $@ 87 88ifeq ($(CONFIG_RISCV_M_MODE)$(CONFIG_SOC_KENDRYTE),yy) 89KBUILD_IMAGE := $(boot)/loader.bin 90else 91KBUILD_IMAGE := $(boot)/Image.gz 92endif 93BOOT_TARGETS := Image Image.gz loader loader.bin 94 95all: $(notdir $(KBUILD_IMAGE)) 96 97$(BOOT_TARGETS): vmlinux 98 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 99 @$(kecho) ' Kernel: $(boot)/$@ is ready' 100 101zinstall install: 102 $(Q)$(MAKE) $(build)=$(boot) $@ 103