1 # This file is included by the global makefile so that you can add your own
2 # architecture-specific flags and dependencies.
4 # This file is subject to the terms and conditions of the GNU General Public
5 # License. See the file "COPYING" in the main directory of this archive
9 OBJCOPYFLAGS
:= -O binary
11 ifeq ($(CONFIG_DYNAMIC_FTRACE
),y
)
12 LDFLAGS_vmlinux
:= --no-relax
13 KBUILD_CPPFLAGS
+= -DCC_USING_PATCHABLE_FUNCTION_ENTRY
14 CC_FLAGS_FTRACE
:= -fpatchable-function-entry
=8
17 ifeq ($(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 KBUILD_CFLAGS
+= -mno-relax
41 KBUILD_AFLAGS
+= -mno-relax
42 ifndef CONFIG_AS_IS_LLVM
43 KBUILD_CFLAGS
+= -Wa
,-mno-relax
44 KBUILD_AFLAGS
+= -Wa
,-mno-relax
49 riscv-march-
$(CONFIG_ARCH_RV32I
) := rv32ima
50 riscv-march-
$(CONFIG_ARCH_RV64I
) := rv64ima
51 riscv-march-
$(CONFIG_FPU
) := $(riscv-march-y
)fd
52 riscv-march-
$(CONFIG_RISCV_ISA_C
) := $(riscv-march-y
)c
54 # Newer binutils versions default to ISA spec version 20191213 which moves some
55 # instructions from the I extension to the Zicsr and Zifencei extensions.
56 toolchain-need-zicsr-zifencei
:= $(call cc-option-yn
, -march
=$(riscv-march-y
)_zicsr_zifencei
)
57 riscv-march-
$(toolchain-need-zicsr-zifencei
) := $(riscv-march-y
)_zicsr_zifencei
59 KBUILD_CFLAGS
+= -march
=$(subst fd
,,$(riscv-march-y
))
60 KBUILD_AFLAGS
+= -march
=$(riscv-march-y
)
62 KBUILD_CFLAGS
+= -mno-save-restore
63 KBUILD_CFLAGS
+= -DCONFIG_PAGE_OFFSET
=$(CONFIG_PAGE_OFFSET
)
65 ifeq ($(CONFIG_CMODEL_MEDLOW
),y
)
66 KBUILD_CFLAGS
+= -mcmodel
=medlow
68 ifeq ($(CONFIG_CMODEL_MEDANY
),y
)
69 KBUILD_CFLAGS
+= -mcmodel
=medany
71 ifeq ($(CONFIG_PERF_EVENTS
),y
)
72 KBUILD_CFLAGS
+= -fno-omit-frame-pointer
75 KBUILD_CFLAGS_MODULE
+= $(call cc-option
,-mno-relax
)
76 KBUILD_AFLAGS_MODULE
+= $(call as-option
,-Wa
$(comma
)-mno-relax
)
78 # GCC versions that support the "-mstrict-align" option default to allowing
79 # unaligned accesses. While unaligned accesses are explicitly allowed in the
80 # RISC-V ISA, they're emulated by machine mode traps on all extant
81 # architectures. It's faster to have GCC emit only aligned accesses.
82 KBUILD_CFLAGS
+= $(call cc-option
,-mstrict-align
)
84 ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK
),y
)
85 prepare
: stack_protector_prepare
86 stack_protector_prepare
: prepare0
87 $(eval KBUILD_CFLAGS
+= -mstack-protector-guard
=tls \
88 -mstack-protector-guard-reg
=tp \
89 -mstack-protector-guard-offset
=$(shell \
90 awk
'{if ($$2 == "TSK_STACK_CANARY") print $$3;}' \
91 include/generated
/asm-offsets.h
))
94 # arch specific predefines for sparse
95 CHECKFLAGS
+= -D__riscv
-D__riscv_xlen
=$(BITS
)
97 # Default target when executing plain make
98 boot
:= arch
/riscv
/boot
99 ifeq ($(CONFIG_XIP_KERNEL
),y
)
100 KBUILD_IMAGE
:= $(boot
)/xipImage
102 KBUILD_IMAGE
:= $(boot
)/Image.gz
105 head-y
:= arch
/riscv
/kernel
/head.o
107 libs-y
+= arch
/riscv
/lib
/
108 libs-
$(CONFIG_EFI_STUB
) += $(objtree
)/drivers
/firmware
/efi
/libstub
/lib.a
110 PHONY
+= vdso_install
112 $(Q
)$(MAKE
) $(build
)=arch
/riscv
/kernel
/vdso
$@
113 $(if
$(CONFIG_COMPAT
),$(Q
)$(MAKE
) \
114 $(build
)=arch
/riscv
/kernel
/compat_vdso compat_
$@
)
116 ifeq ($(KBUILD_EXTMOD
),)
117 ifeq ($(CONFIG_MMU
),y
)
118 prepare
: vdso_prepare
119 vdso_prepare
: prepare0
120 $(Q
)$(MAKE
) $(build
)=arch
/riscv
/kernel
/vdso
include/generated
/vdso-offsets.h
121 $(if
$(CONFIG_COMPAT
),$(Q
)$(MAKE
) \
122 $(build
)=arch
/riscv
/kernel
/compat_vdso
include/generated
/compat_vdso-offsets.h
)
127 ifneq ($(CONFIG_XIP_KERNEL
),y
)
128 ifeq ($(CONFIG_RISCV_M_MODE
)$(CONFIG_SOC_CANAAN
),yy
)
129 KBUILD_IMAGE
:= $(boot
)/loader.bin
131 KBUILD_IMAGE
:= $(boot
)/Image.gz
134 BOOT_TARGETS
:= Image Image.gz loader loader.bin xipImage
136 all: $(notdir $(KBUILD_IMAGE
))
138 $(BOOT_TARGETS
): vmlinux
139 $(Q
)$(MAKE
) $(build
)=$(boot
) $(boot
)/$@
140 @
$(kecho
) ' Kernel: $(boot)/$@ is ready'
143 $(Q
)$(MAKE
) $(build
)=$(boot
) $(boot
)/$@
145 install: KBUILD_IMAGE
:= $(boot
)/Image
146 zinstall
: KBUILD_IMAGE
:= $(boot
)/Image.gz
150 PHONY
+= rv32_randconfig
152 $(Q
)$(MAKE
) KCONFIG_ALLCONFIG
=$(srctree
)/arch
/riscv
/configs
/32-bit.config \
153 -f
$(srctree
)/Makefile randconfig
155 PHONY
+= rv64_randconfig
157 $(Q
)$(MAKE
) KCONFIG_ALLCONFIG
=$(srctree
)/arch
/riscv
/configs
/64-bit.config \
158 -f
$(srctree
)/Makefile randconfig
160 PHONY
+= rv32_defconfig
162 $(Q
)$(MAKE
) -f
$(srctree
)/Makefile defconfig
32-bit.config