| # This file is included by the global makefile so that you can add your own |
| # architecture-specific flags and dependencies. Remember to do have actions |
| # for "archclean" and "archdep" for cleaning up and making dependencies for |
| # this architecture |
| # |
| # This file is subject to the terms and conditions of the GNU General Public |
| # License. See the file "COPYING" in the main directory of this archive |
| # for more details. |
| # |
| |
| OBJCOPYFLAGS := -O binary |
| LDFLAGS_vmlinux := |
| ifeq ($(CONFIG_DYNAMIC_FTRACE),y) |
| LDFLAGS_vmlinux := --no-relax |
| endif |
| KBUILD_AFLAGS_MODULE += -fPIC |
| KBUILD_CFLAGS_MODULE += -fPIC |
| |
| export BITS |
| ifeq ($(CONFIG_ARCH_RV64I),y) |
| BITS := 64 |
| UTS_MACHINE := riscv64 |
| |
| KBUILD_CFLAGS += -mabi=lp64 |
| KBUILD_AFLAGS += -mabi=lp64 |
| |
| KBUILD_LDFLAGS += -melf64lriscv |
| else |
| BITS := 32 |
| UTS_MACHINE := riscv32 |
| |
| KBUILD_CFLAGS += -mabi=ilp32 |
| KBUILD_AFLAGS += -mabi=ilp32 |
| KBUILD_LDFLAGS += -melf32lriscv |
| endif |
| |
| ifeq ($(CONFIG_LD_IS_LLD),y) |
| KBUILD_CFLAGS += -mno-relax |
| KBUILD_AFLAGS += -mno-relax |
| ifneq ($(LLVM_IAS),1) |
| KBUILD_CFLAGS += -Wa,-mno-relax |
| KBUILD_AFLAGS += -Wa,-mno-relax |
| endif |
| endif |
| |
| # ISA string setting |
| riscv-march-$(CONFIG_ARCH_RV32I) := rv32ima |
| riscv-march-$(CONFIG_ARCH_RV64I) := rv64ima |
| riscv-march-$(CONFIG_FPU) := $(riscv-march-y)fd |
| riscv-march-$(CONFIG_RISCV_ISA_C) := $(riscv-march-y)c |
| KBUILD_CFLAGS += -march=$(subst fd,,$(riscv-march-y)) |
| KBUILD_AFLAGS += -march=$(riscv-march-y) |
| |
| KBUILD_CFLAGS += -mno-save-restore |
| KBUILD_CFLAGS += -DCONFIG_PAGE_OFFSET=$(CONFIG_PAGE_OFFSET) |
| |
| ifeq ($(CONFIG_CMODEL_MEDLOW),y) |
| KBUILD_CFLAGS += -mcmodel=medlow |
| endif |
| ifeq ($(CONFIG_CMODEL_MEDANY),y) |
| KBUILD_CFLAGS += -mcmodel=medany |
| endif |
| ifeq ($(CONFIG_MODULE_SECTIONS),y) |
| KBUILD_LDS_MODULE += $(srctree)/arch/riscv/kernel/module.lds |
| endif |
| ifeq ($(CONFIG_PERF_EVENTS),y) |
| KBUILD_CFLAGS += -fno-omit-frame-pointer |
| endif |
| |
| KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax) |
| |
| # GCC versions that support the "-mstrict-align" option default to allowing |
| # unaligned accesses. While unaligned accesses are explicitly allowed in the |
| # RISC-V ISA, they're emulated by machine mode traps on all extant |
| # architectures. It's faster to have GCC emit only aligned accesses. |
| KBUILD_CFLAGS += $(call cc-option,-mstrict-align) |
| |
| # arch specific predefines for sparse |
| CHECKFLAGS += -D__riscv -D__riscv_xlen=$(BITS) |
| |
| # Default target when executing plain make |
| boot := arch/riscv/boot |
| KBUILD_IMAGE := $(boot)/Image.gz |
| |
| head-y := arch/riscv/kernel/head.o |
| |
| core-y += arch/riscv/ |
| |
| libs-y += arch/riscv/lib/ |
| |
| PHONY += vdso_install |
| vdso_install: |
| $(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso $@ |
| |
| all: Image.gz |
| |
| Image: vmlinux |
| $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ |
| |
| Image.%: Image |
| $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ |
| |
| zinstall install: |
| $(Q)$(MAKE) $(build)=$(boot) $@ |