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 ($(CONFIG_DYNAMIC_FTRACE
),y
)
14 LDFLAGS_vmlinux
:= --no-relax
15 KBUILD_CPPFLAGS
+= -DCC_USING_PATCHABLE_FUNCTION_ENTRY
16 CC_FLAGS_FTRACE
:= -fpatchable-function-entry
=8
19 ifeq ($(CONFIG_CMODEL_MEDLOW
),y
)
20 KBUILD_CFLAGS_MODULE
+= -mcmodel
=medany
24 ifeq ($(CONFIG_ARCH_RV64I
),y
)
26 UTS_MACHINE
:= riscv64
28 KBUILD_CFLAGS
+= -mabi
=lp64
29 KBUILD_AFLAGS
+= -mabi
=lp64
31 KBUILD_LDFLAGS
+= -melf64lriscv
34 UTS_MACHINE
:= riscv32
36 KBUILD_CFLAGS
+= -mabi
=ilp32
37 KBUILD_AFLAGS
+= -mabi
=ilp32
38 KBUILD_LDFLAGS
+= -melf32lriscv
41 ifeq ($(CONFIG_LD_IS_LLD
),y
)
42 KBUILD_CFLAGS
+= -mno-relax
43 KBUILD_AFLAGS
+= -mno-relax
44 ifndef CONFIG_AS_IS_LLVM
45 KBUILD_CFLAGS
+= -Wa
,-mno-relax
46 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
) := $(riscv-march-y
)c
55 KBUILD_CFLAGS
+= -march
=$(subst fd
,,$(riscv-march-y
))
56 KBUILD_AFLAGS
+= -march
=$(riscv-march-y
)
58 KBUILD_CFLAGS
+= -mno-save-restore
59 KBUILD_CFLAGS
+= -DCONFIG_PAGE_OFFSET
=$(CONFIG_PAGE_OFFSET
)
61 ifeq ($(CONFIG_CMODEL_MEDLOW
),y
)
62 KBUILD_CFLAGS
+= -mcmodel
=medlow
64 ifeq ($(CONFIG_CMODEL_MEDANY
),y
)
65 KBUILD_CFLAGS
+= -mcmodel
=medany
67 ifeq ($(CONFIG_PERF_EVENTS
),y
)
68 KBUILD_CFLAGS
+= -fno-omit-frame-pointer
71 KBUILD_CFLAGS_MODULE
+= $(call cc-option
,-mno-relax
)
73 # GCC versions that support the "-mstrict-align" option default to allowing
74 # unaligned accesses. While unaligned accesses are explicitly allowed in the
75 # RISC-V ISA, they're emulated by machine mode traps on all extant
76 # architectures. It's faster to have GCC emit only aligned accesses.
77 KBUILD_CFLAGS
+= $(call cc-option
,-mstrict-align
)
79 ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK
),y
)
80 prepare
: stack_protector_prepare
81 stack_protector_prepare
: prepare0
82 $(eval KBUILD_CFLAGS
+= -mstack-protector-guard
=tls \
83 -mstack-protector-guard-reg
=tp \
84 -mstack-protector-guard-offset
=$(shell \
85 awk
'{if ($$2 == "TSK_STACK_CANARY") print $$3;}' \
86 include/generated
/asm-offsets.h
))
89 # arch specific predefines for sparse
90 CHECKFLAGS
+= -D__riscv
-D__riscv_xlen
=$(BITS
)
92 # Default target when executing plain make
93 boot
:= arch
/riscv
/boot
94 ifeq ($(CONFIG_XIP_KERNEL
),y
)
95 KBUILD_IMAGE
:= $(boot
)/xipImage
97 KBUILD_IMAGE
:= $(boot
)/Image.gz
100 head-y
:= arch
/riscv
/kernel
/head.o
102 core-
$(CONFIG_RISCV_ERRATA_ALTERNATIVE
) += arch
/riscv
/errata
/
104 libs-y
+= arch
/riscv
/lib
/
105 libs-
$(CONFIG_EFI_STUB
) += $(objtree
)/drivers
/firmware
/efi
/libstub
/lib.a
107 PHONY
+= vdso_install
109 $(Q
)$(MAKE
) $(build
)=arch
/riscv
/kernel
/vdso
$@
111 ifeq ($(CONFIG_MMU
),y
)
112 prepare
: vdso_prepare
113 vdso_prepare
: prepare0
114 $(Q
)$(MAKE
) $(build
)=arch
/riscv
/kernel
/vdso
include/generated
/vdso-offsets.h
117 ifneq ($(CONFIG_XIP_KERNEL
),y
)
118 ifeq ($(CONFIG_RISCV_M_MODE
)$(CONFIG_SOC_CANAAN
),yy
)
119 KBUILD_IMAGE
:= $(boot
)/loader.bin
121 KBUILD_IMAGE
:= $(boot
)/Image.gz
124 BOOT_TARGETS
:= Image Image.gz loader loader.bin xipImage
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
) $(boot
)/$@
136 $(Q
)$(MAKE
) $(build
)=$(boot
) $@
139 $(Q
)$(MAKE
) $(clean)=$(boot
)