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
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
11 OBJCOPYFLAGS := -O binary
13 ifeq ($(CONFIG_DYNAMIC_FTRACE),y)
14 LDFLAGS_vmlinux := --no-relax
17 ifeq ($(CONFIG_CMODEL_MEDLOW),y)
18 KBUILD_CFLAGS_MODULE += -mcmodel=medany
22 ifeq ($(CONFIG_ARCH_RV64I),y)
24 UTS_MACHINE := riscv64
26 KBUILD_CFLAGS += -mabi=lp64
27 KBUILD_AFLAGS += -mabi=lp64
29 KBUILD_LDFLAGS += -melf64lriscv
32 UTS_MACHINE := riscv32
34 KBUILD_CFLAGS += -mabi=ilp32
35 KBUILD_AFLAGS += -mabi=ilp32
36 KBUILD_LDFLAGS += -melf32lriscv
39 ifeq ($(CONFIG_LD_IS_LLD),y)
40 ifeq ($(shell test $(CONFIG_LLD_VERSION) -lt 150000; echo $$?),0)
41 KBUILD_CFLAGS += -mno-relax
42 KBUILD_AFLAGS += -mno-relax
43 ifndef CONFIG_AS_IS_LLVM
44 KBUILD_CFLAGS += -Wa,-mno-relax
45 KBUILD_AFLAGS += -Wa,-mno-relax
51 riscv-march-$(CONFIG_ARCH_RV32I) := rv32ima
52 riscv-march-$(CONFIG_ARCH_RV64I) := rv64ima
53 riscv-march-$(CONFIG_FPU) := $(riscv-march-y)fd
54 riscv-march-$(CONFIG_RISCV_ISA_C) := $(riscv-march-y)c
56 ifdef CONFIG_TOOLCHAIN_NEEDS_OLD_ISA_SPEC
57 KBUILD_CFLAGS += -Wa,-misa-spec=2.2
58 KBUILD_AFLAGS += -Wa,-misa-spec=2.2
60 riscv-march-$(CONFIG_TOOLCHAIN_NEEDS_EXPLICIT_ZICSR_ZIFENCEI) := $(riscv-march-y)_zicsr_zifencei
63 KBUILD_CFLAGS += -march=$(subst fd,,$(riscv-march-y))
64 KBUILD_AFLAGS += -march=$(riscv-march-y)
66 KBUILD_CFLAGS += -mno-save-restore
67 KBUILD_CFLAGS += -DCONFIG_PAGE_OFFSET=$(CONFIG_PAGE_OFFSET)
69 ifeq ($(CONFIG_CMODEL_MEDLOW),y)
70 KBUILD_CFLAGS += -mcmodel=medlow
72 ifeq ($(CONFIG_CMODEL_MEDANY),y)
73 KBUILD_CFLAGS += -mcmodel=medany
75 ifeq ($(CONFIG_PERF_EVENTS),y)
76 KBUILD_CFLAGS += -fno-omit-frame-pointer
79 # Avoid generating .eh_frame sections.
80 KBUILD_CFLAGS += -fno-asynchronous-unwind-tables -fno-unwind-tables
82 KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax)
83 KBUILD_AFLAGS_MODULE += $(call as-option,-Wa$(comma)-mno-relax)
85 # GCC versions that support the "-mstrict-align" option default to allowing
86 # unaligned accesses. While unaligned accesses are explicitly allowed in the
87 # RISC-V ISA, they're emulated by machine mode traps on all extant
88 # architectures. It's faster to have GCC emit only aligned accesses.
89 KBUILD_CFLAGS += $(call cc-option,-mstrict-align)
91 ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y)
92 prepare: stack_protector_prepare
93 stack_protector_prepare: prepare0
94 $(eval KBUILD_CFLAGS += -mstack-protector-guard=tls \
95 -mstack-protector-guard-reg=tp \
96 -mstack-protector-guard-offset=$(shell \
97 awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}' \
98 include/generated/asm-offsets.h))
101 # arch specific predefines for sparse
102 CHECKFLAGS += -D__riscv -D__riscv_xlen=$(BITS)
104 # Default target when executing plain make
105 boot := arch/riscv/boot
106 KBUILD_IMAGE := $(boot)/Image.gz
108 head-y := arch/riscv/kernel/head.o
110 core-y += arch/riscv/
112 libs-y += arch/riscv/lib/
113 libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
115 PHONY += vdso_install
117 $(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso $@
119 ifeq ($(CONFIG_RISCV_M_MODE)$(CONFIG_SOC_KENDRYTE),yy)
120 KBUILD_IMAGE := $(boot)/loader.bin
122 KBUILD_IMAGE := $(boot)/Image.gz
124 BOOT_TARGETS := Image Image.gz loader loader.bin
126 all: $(notdir $(KBUILD_IMAGE))
128 $(BOOT_TARGETS): vmlinux
129 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
130 @$(kecho) ' Kernel: $(boot)/$@ is ready'
133 $(Q)$(MAKE) $(build)=$(boot) $@