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118 lines
3.3 KiB
118 lines
3.3 KiB
# This file is included by the global makefile so that you can add your own |
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# architecture-specific flags and dependencies. Remember to do have actions |
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# for "archclean" and "archdep" for cleaning up and making dependencies for |
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# this architecture |
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# |
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# This file is subject to the terms and conditions of the GNU General Public |
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# License. See the file "COPYING" in the main directory of this archive |
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# for more details. |
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# |
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OBJCOPYFLAGS := -O binary |
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LDFLAGS_vmlinux := |
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ifeq ($(CONFIG_DYNAMIC_FTRACE),y) |
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LDFLAGS_vmlinux := --no-relax |
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KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY |
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CC_FLAGS_FTRACE := -fpatchable-function-entry=8 |
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endif |
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ifeq ($(CONFIG_64BIT)$(CONFIG_CMODEL_MEDLOW),yy) |
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KBUILD_CFLAGS_MODULE += -mcmodel=medany |
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endif |
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export BITS |
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ifeq ($(CONFIG_ARCH_RV64I),y) |
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BITS := 64 |
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UTS_MACHINE := riscv64 |
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KBUILD_CFLAGS += -mabi=lp64 |
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KBUILD_AFLAGS += -mabi=lp64 |
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KBUILD_LDFLAGS += -melf64lriscv |
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else |
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BITS := 32 |
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UTS_MACHINE := riscv32 |
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KBUILD_CFLAGS += -mabi=ilp32 |
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KBUILD_AFLAGS += -mabi=ilp32 |
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KBUILD_LDFLAGS += -melf32lriscv |
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endif |
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# ISA string setting |
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riscv-march-$(CONFIG_ARCH_RV32I) := rv32ima |
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riscv-march-$(CONFIG_ARCH_RV64I) := rv64ima |
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riscv-march-$(CONFIG_FPU) := $(riscv-march-y)fd |
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riscv-march-$(CONFIG_RISCV_ISA_C) := $(riscv-march-y)c |
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KBUILD_CFLAGS += -march=$(subst fd,,$(riscv-march-y)) |
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KBUILD_AFLAGS += -march=$(riscv-march-y) |
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KBUILD_CFLAGS += -mno-save-restore |
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KBUILD_CFLAGS += -DCONFIG_PAGE_OFFSET=$(CONFIG_PAGE_OFFSET) |
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ifeq ($(CONFIG_CMODEL_MEDLOW),y) |
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KBUILD_CFLAGS += -mcmodel=medlow |
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endif |
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ifeq ($(CONFIG_CMODEL_MEDANY),y) |
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KBUILD_CFLAGS += -mcmodel=medany |
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endif |
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ifeq ($(CONFIG_PERF_EVENTS),y) |
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KBUILD_CFLAGS += -fno-omit-frame-pointer |
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endif |
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KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax) |
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# GCC versions that support the "-mstrict-align" option default to allowing |
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# unaligned accesses. While unaligned accesses are explicitly allowed in the |
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# RISC-V ISA, they're emulated by machine mode traps on all extant |
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# architectures. It's faster to have GCC emit only aligned accesses. |
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KBUILD_CFLAGS += $(call cc-option,-mstrict-align) |
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ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y) |
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prepare: stack_protector_prepare |
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stack_protector_prepare: prepare0 |
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$(eval KBUILD_CFLAGS += -mstack-protector-guard=tls \ |
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-mstack-protector-guard-reg=tp \ |
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-mstack-protector-guard-offset=$(shell \ |
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awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}' \ |
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include/generated/asm-offsets.h)) |
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endif |
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# arch specific predefines for sparse |
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CHECKFLAGS += -D__riscv -D__riscv_xlen=$(BITS) |
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# Default target when executing plain make |
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boot := arch/riscv/boot |
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KBUILD_IMAGE := $(boot)/Image.gz |
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head-y := arch/riscv/kernel/head.o |
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core-y += arch/riscv/ |
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libs-y += arch/riscv/lib/ |
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libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a |
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PHONY += vdso_install |
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vdso_install: |
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$(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso $@ |
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ifeq ($(CONFIG_RISCV_M_MODE)$(CONFIG_SOC_CANAAN),yy) |
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KBUILD_IMAGE := $(boot)/loader.bin |
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else |
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KBUILD_IMAGE := $(boot)/Image.gz |
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endif |
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BOOT_TARGETS := Image Image.gz loader loader.bin |
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all: $(notdir $(KBUILD_IMAGE)) |
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$(BOOT_TARGETS): vmlinux |
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$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ |
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@$(kecho) ' Kernel: $(boot)/$@ is ready' |
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Image.%: Image |
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$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ |
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zinstall install: |
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$(Q)$(MAKE) $(build)=$(boot) $@ |
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archclean: |
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$(Q)$(MAKE) $(clean)=$(boot)
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