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 ($(CONFIG_DYNAMIC_FTRACE),y) 14 LDFLAGS_vmlinux := --no-relax 15 KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY 16 CC_FLAGS_FTRACE := -fpatchable-function-entry=8 17endif 18 19ifeq ($(CONFIG_64BIT)$(CONFIG_CMODEL_MEDLOW),yy) 20KBUILD_CFLAGS_MODULE += -mcmodel=medany 21endif 22 23export BITS 24ifeq ($(CONFIG_ARCH_RV64I),y) 25 BITS := 64 26 UTS_MACHINE := riscv64 27 28 KBUILD_CFLAGS += -mabi=lp64 29 KBUILD_AFLAGS += -mabi=lp64 30 31 KBUILD_LDFLAGS += -melf64lriscv 32else 33 BITS := 32 34 UTS_MACHINE := riscv32 35 36 KBUILD_CFLAGS += -mabi=ilp32 37 KBUILD_AFLAGS += -mabi=ilp32 38 KBUILD_LDFLAGS += -melf32lriscv 39endif 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_PERF_EVENTS),y) 59 KBUILD_CFLAGS += -fno-omit-frame-pointer 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 += $(call cc-option,-mstrict-align) 69 70ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y) 71prepare: stack_protector_prepare 72stack_protector_prepare: prepare0 73 $(eval KBUILD_CFLAGS += -mstack-protector-guard=tls \ 74 -mstack-protector-guard-reg=tp \ 75 -mstack-protector-guard-offset=$(shell \ 76 awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}' \ 77 include/generated/asm-offsets.h)) 78endif 79 80# arch specific predefines for sparse 81CHECKFLAGS += -D__riscv -D__riscv_xlen=$(BITS) 82 83# Default target when executing plain make 84boot := arch/riscv/boot 85KBUILD_IMAGE := $(boot)/Image.gz 86 87head-y := arch/riscv/kernel/head.o 88 89core-y += arch/riscv/ 90 91libs-y += arch/riscv/lib/ 92libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a 93 94PHONY += vdso_install 95vdso_install: 96 $(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso $@ 97 98ifeq ($(CONFIG_RISCV_M_MODE)$(CONFIG_SOC_CANAAN),yy) 99KBUILD_IMAGE := $(boot)/loader.bin 100else 101KBUILD_IMAGE := $(boot)/Image.gz 102endif 103BOOT_TARGETS := Image Image.gz loader loader.bin 104 105all: $(notdir $(KBUILD_IMAGE)) 106 107$(BOOT_TARGETS): vmlinux 108 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 109 @$(kecho) ' Kernel: $(boot)/$@ is ready' 110 111Image.%: Image 112 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 113 114zinstall install: 115 $(Q)$(MAKE) $(build)=$(boot) $@ 116 117archclean: 118 $(Q)$(MAKE) $(clean)=$(boot) 119