summaryrefslogtreecommitdiff
path: root/arch/riscv/Makefile
blob: 6ec6d52a4180442ab44dd9d91b30d9ee71debcca (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
# This file is included by the global makefile so that you can add your own
# architecture-specific flags and dependencies.
#
# 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 := -z norelro
ifeq ($(CONFIG_RELOCATABLE),y)
	LDFLAGS_vmlinux += -shared -Bsymbolic -z notext --emit-relocs
	KBUILD_CFLAGS += -fPIE
endif
ifeq ($(CONFIG_DYNAMIC_FTRACE),y)
	LDFLAGS_vmlinux += --no-relax
	KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY
ifeq ($(CONFIG_RISCV_ISA_C),y)
	CC_FLAGS_FTRACE := -fpatchable-function-entry=4
else
	CC_FLAGS_FTRACE := -fpatchable-function-entry=2
endif
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 ($(CONFIG_LD_IS_LLD),y)
ifeq ($(call test-lt, $(CONFIG_LLD_VERSION), 150000),y)
	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)	:= $(riscv-march-y)c
riscv-march-$(CONFIG_RISCV_ISA_V)	:= $(riscv-march-y)v

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

# Check if the toolchain supports Zihintpause extension
riscv-march-$(CONFIG_TOOLCHAIN_HAS_ZIHINTPAUSE) := $(riscv-march-y)_zihintpause

# Remove F,D,V from isa string for all. Keep extensions between "fd" and "v" by
# matching non-v and non-multi-letter extensions out with the filter ([^v_]*)
KBUILD_CFLAGS += -march=$(shell echo $(riscv-march-y) | sed -E 's/(rv32ima|rv64ima)fd([^v_]*)v?/\1\2/')

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

# The RISC-V attributes frequently cause compatibility issues and provide no
# information, so just turn them off.
KBUILD_CFLAGS += $(call cc-option,-mno-riscv-attribute)
KBUILD_AFLAGS += $(call cc-option,-mno-riscv-attribute)
KBUILD_CFLAGS += $(call as-option,-Wa$(comma)-mno-arch-attr)
KBUILD_AFLAGS += $(call as-option,-Wa$(comma)-mno-arch-attr)

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)

ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y)
prepare: stack_protector_prepare
stack_protector_prepare: prepare0
	$(eval KBUILD_CFLAGS += -mstack-protector-guard=tls		  \
				-mstack-protector-guard-reg=tp		  \
				-mstack-protector-guard-offset=$(shell	  \
			awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}' \
					include/generated/asm-offsets.h))
endif

# arch specific predefines for sparse
CHECKFLAGS += -D__riscv -D__riscv_xlen=$(BITS)

# Default target when executing plain make
boot		:= arch/riscv/boot
ifeq ($(CONFIG_XIP_KERNEL),y)
KBUILD_IMAGE := $(boot)/xipImage
else
KBUILD_IMAGE	:= $(boot)/Image.gz
endif

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 $@
	$(if $(CONFIG_COMPAT),$(Q)$(MAKE) \
		$(build)=arch/riscv/kernel/compat_vdso compat_$@)

ifeq ($(KBUILD_EXTMOD),)
ifeq ($(CONFIG_MMU),y)
prepare: vdso_prepare
vdso_prepare: prepare0
	$(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso include/generated/vdso-offsets.h
	$(if $(CONFIG_COMPAT),$(Q)$(MAKE) \
		$(build)=arch/riscv/kernel/compat_vdso include/generated/compat_vdso-offsets.h)

endif
endif

ifneq ($(CONFIG_XIP_KERNEL),y)
ifeq ($(CONFIG_RISCV_M_MODE)$(CONFIG_ARCH_CANAAN),yy)
KBUILD_IMAGE := $(boot)/loader.bin
else
ifeq ($(CONFIG_EFI_ZBOOT),)
KBUILD_IMAGE := $(boot)/Image.gz
else
KBUILD_IMAGE := $(boot)/vmlinuz.efi
endif
endif
endif
BOOT_TARGETS := Image Image.gz loader loader.bin xipImage vmlinuz.efi

all:	$(notdir $(KBUILD_IMAGE))

$(BOOT_TARGETS): vmlinux
	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
	@$(kecho) '  Kernel: $(boot)/$@ is ready'

Image.%: Image
	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@

install: KBUILD_IMAGE := $(boot)/Image
zinstall: KBUILD_IMAGE := $(boot)/Image.gz
install zinstall:
	$(call cmd,install)

PHONY += rv32_randconfig
rv32_randconfig:
	$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/riscv/configs/32-bit.config \
		-f $(srctree)/Makefile randconfig

PHONY += rv64_randconfig
rv64_randconfig:
	$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/riscv/configs/64-bit.config \
		-f $(srctree)/Makefile randconfig

PHONY += rv32_defconfig
rv32_defconfig:
	$(Q)$(MAKE) -f $(srctree)/Makefile defconfig 32-bit.config

PHONY += rv32_nommu_virt_defconfig
rv32_nommu_virt_defconfig:
	$(Q)$(MAKE) -f $(srctree)/Makefile nommu_virt_defconfig 32-bit.config