diff options
Diffstat (limited to 'arch/riscv/Makefile')
| -rw-r--r-- | arch/riscv/Makefile | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/arch/riscv/Makefile b/arch/riscv/Makefile new file mode 100644 index 000000000..daa679440 --- /dev/null +++ b/arch/riscv/Makefile @@ -0,0 +1,123 @@ +# 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 ($(CONFIG_DYNAMIC_FTRACE),y) + LDFLAGS_vmlinux := --no-relax +endif + +ifeq ($(CONFIG_CMODEL_MEDLOW),y) +KBUILD_CFLAGS_MODULE += -mcmodel=medany +endif + +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) +ifeq ($(shell test $(CONFIG_LLD_VERSION) -lt 150000; echo $$?),0) + KBUILD_CFLAGS += -mno-relax + KBUILD_AFLAGS += -mno-relax +ifndef CONFIG_AS_IS_LLVM + KBUILD_CFLAGS += -Wa,-mno-relax + KBUILD_AFLAGS += -Wa,-mno-relax +endif +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) := $(riscv-march-y)c + +ifdef CONFIG_TOOLCHAIN_NEEDS_OLD_ISA_SPEC +KBUILD_CFLAGS += -Wa,-misa-spec=2.2 +KBUILD_AFLAGS += -Wa,-misa-spec=2.2 +else +riscv-march-$(CONFIG_TOOLCHAIN_NEEDS_EXPLICIT_ZICSR_ZIFENCEI) := $(riscv-march-y)_zicsr_zifencei +endif + +KBUILD_CFLAGS += -march=$(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_PERF_EVENTS),y) + KBUILD_CFLAGS += -fno-omit-frame-pointer +endif + +# Avoid generating .eh_frame sections. +KBUILD_CFLAGS += -fno-asynchronous-unwind-tables -fno-unwind-tables + +KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax) +KBUILD_AFLAGS_MODULE += $(call as-option,-Wa$(comma)-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 := $(boot)/Image.gz + +head-y := arch/riscv/kernel/head.o + +core-y += arch/riscv/ + +libs-y += arch/riscv/lib/ +libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a + +PHONY += vdso_install +vdso_install: + $(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso $@ + +ifeq ($(CONFIG_RISCV_M_MODE)$(CONFIG_SOC_KENDRYTE),yy) +KBUILD_IMAGE := $(boot)/loader.bin +else +KBUILD_IMAGE := $(boot)/Image.gz +endif +BOOT_TARGETS := Image Image.gz loader loader.bin + +all: $(notdir $(KBUILD_IMAGE)) + +$(BOOT_TARGETS): vmlinux + $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ + @$(kecho) ' Kernel: $(boot)/$@ is ready' + +zinstall install: + $(Q)$(MAKE) $(build)=$(boot) $@ |