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1# SPDX-License-Identifier: GPL-2.0
2#
3# For a description of the syntax of this configuration file,
4# see Documentation/kbuild/kconfig-language.rst.
5#
6
7config OPENRISC
8 def_bool y
9 select ARCH_32BIT_OFF_T
10 select ARCH_HAS_DMA_SET_UNCACHED
11 select ARCH_HAS_DMA_CLEAR_UNCACHED
12 select ARCH_HAS_SYNC_DMA_FOR_DEVICE
13 select COMMON_CLK
14 select OF
15 select OF_EARLY_FLATTREE
16 select IRQ_DOMAIN
17 select GPIOLIB
18 select HAVE_ARCH_TRACEHOOK
19 select SPARSE_IRQ
20 select GENERIC_IRQ_CHIP
21 select GENERIC_IRQ_PROBE
22 select GENERIC_IRQ_SHOW
23 select GENERIC_PCI_IOMAP
24 select GENERIC_CPU_DEVICES
25 select HAVE_PCI
26 select HAVE_UID16
27 select GENERIC_ATOMIC64
28 select GENERIC_CLOCKEVENTS_BROADCAST
29 select GENERIC_SMP_IDLE_THREAD
30 select MODULES_USE_ELF_RELA
31 select HAVE_DEBUG_STACKOVERFLOW
32 select OR1K_PIC
33 select CPU_NO_EFFICIENT_FFS if !OPENRISC_HAVE_INST_FF1
34 select ARCH_USE_QUEUED_RWLOCKS
35 select OMPIC if SMP
36 select PCI_DOMAINS_GENERIC if PCI
37 select PCI_MSI if PCI
38 select ARCH_WANT_FRAME_POINTERS
39 select GENERIC_IRQ_MULTI_HANDLER
40 select MMU_GATHER_NO_RANGE if MMU
41 select TRACE_IRQFLAGS_SUPPORT
42
43config CPU_BIG_ENDIAN
44 def_bool y
45
46config MMU
47 def_bool y
48
49config GENERIC_HWEIGHT
50 def_bool y
51
52config NO_IOPORT_MAP
53 def_bool y
54
55# For now, use generic checksum functions
56#These can be reimplemented in assembly later if so inclined
57config GENERIC_CSUM
58 def_bool y
59
60config STACKTRACE_SUPPORT
61 def_bool y
62
63config LOCKDEP_SUPPORT
64 def_bool y
65
66menu "Processor type and features"
67
68choice
69 prompt "Subarchitecture"
70 default OR1K_1200
71
72config OR1K_1200
73 bool "OR1200"
74 help
75 Generic OpenRISC 1200 architecture
76
77endchoice
78
79config DCACHE_WRITETHROUGH
80 bool "Have write through data caches"
81 default n
82 help
83 Select this if your implementation features write through data caches.
84 Selecting 'N' here will allow the kernel to force flushing of data
85 caches at relevant times. Most OpenRISC implementations support write-
86 through data caches.
87
88 If unsure say N here
89
90config OPENRISC_BUILTIN_DTB
91 string "Builtin DTB"
92 default ""
93
94menu "Class II Instructions"
95
96config OPENRISC_HAVE_INST_FF1
97 bool "Have instruction l.ff1"
98 default y
99 help
100 Select this if your implementation has the Class II instruction l.ff1
101
102config OPENRISC_HAVE_INST_FL1
103 bool "Have instruction l.fl1"
104 default y
105 help
106 Select this if your implementation has the Class II instruction l.fl1
107
108config OPENRISC_HAVE_INST_MUL
109 bool "Have instruction l.mul for hardware multiply"
110 default y
111 help
112 Select this if your implementation has a hardware multiply instruction
113
114config OPENRISC_HAVE_INST_DIV
115 bool "Have instruction l.div for hardware divide"
116 default y
117 help
118 Select this if your implementation has a hardware divide instruction
119
120config OPENRISC_HAVE_INST_CMOV
121 bool "Have instruction l.cmov for conditional move"
122 default n
123 help
124 This config enables gcc to generate l.cmov instructions when compiling
125 the kernel which in general will improve performance and reduce the
126 binary size.
127
128 Select this if your implementation has support for the Class II
129 l.cmov conistional move instruction.
130
131 Say N if you are unsure.
132
133config OPENRISC_HAVE_INST_ROR
134 bool "Have instruction l.ror for rotate right"
135 default n
136 help
137 This config enables gcc to generate l.ror instructions when compiling
138 the kernel which in general will improve performance and reduce the
139 binary size.
140
141 Select this if your implementation has support for the Class II
142 l.ror rotate right instruction.
143
144 Say N if you are unsure.
145
146config OPENRISC_HAVE_INST_RORI
147 bool "Have instruction l.rori for rotate right with immediate"
148 default n
149 help
150 This config enables gcc to generate l.rori instructions when compiling
151 the kernel which in general will improve performance and reduce the
152 binary size.
153
154 Select this if your implementation has support for the Class II
155 l.rori rotate right with immediate instruction.
156
157 Say N if you are unsure.
158
159config OPENRISC_HAVE_INST_SEXT
160 bool "Have instructions l.ext* for sign extension"
161 default n
162 help
163 This config enables gcc to generate l.ext* instructions when compiling
164 the kernel which in general will improve performance and reduce the
165 binary size.
166
167 Select this if your implementation has support for the Class II
168 l.exths, l.extbs, l.exthz and l.extbz size extend instructions.
169
170 Say N if you are unsure.
171
172endmenu
173
174config NR_CPUS
175 int "Maximum number of CPUs (2-32)"
176 range 2 32
177 depends on SMP
178 default "2"
179
180config SMP
181 bool "Symmetric Multi-Processing support"
182 help
183 This enables support for systems with more than one CPU. If you have
184 a system with only one CPU, say N. If you have a system with more
185 than one CPU, say Y.
186
187 If you don't know what to do here, say N.
188
189source "kernel/Kconfig.hz"
190
191config OPENRISC_NO_SPR_SR_DSX
192 bool "use SPR_SR_DSX software emulation" if OR1K_1200
193 default y
194 help
195 SPR_SR_DSX bit is status register bit indicating whether
196 the last exception has happened in delay slot.
197
198 OpenRISC architecture makes it optional to have it implemented
199 in hardware and the OR1200 does not have it.
200
201 Say N here if you know that your OpenRISC processor has
202 SPR_SR_DSX bit implemented. Say Y if you are unsure.
203
204config OPENRISC_HAVE_SHADOW_GPRS
205 bool "Support for shadow gpr files" if !SMP
206 default y if SMP
207 help
208 Say Y here if your OpenRISC processor features shadowed
209 register files. They will in such case be used as a
210 scratch reg storage on exception entry.
211
212 On SMP systems, this feature is mandatory.
213 On a unicore system it's safe to say N here if you are unsure.
214
215config CMDLINE
216 string "Default kernel command string"
217 default ""
218 help
219 On some architectures there is currently no way for the boot loader
220 to pass arguments to the kernel. For these architectures, you should
221 supply some command-line options at build time by entering them
222 here.
223
224menu "Debugging options"
225
226config JUMP_UPON_UNHANDLED_EXCEPTION
227 bool "Try to die gracefully"
228 default y
229 help
230 Now this puts kernel into infinite loop after first oops. Till
231 your kernel crashes this doesn't have any influence.
232
233 Say Y if you are unsure.
234
235config OPENRISC_ESR_EXCEPTION_BUG_CHECK
236 bool "Check for possible ESR exception bug"
237 default n
238 help
239 This option enables some checks that might expose some problems
240 in kernel.
241
242 Say N if you are unsure.
243
244endmenu
245
246endmenu
1#
2# For a description of the syntax of this configuration file,
3# see Documentation/kbuild/kconfig-language.txt.
4#
5
6config OPENRISC
7 def_bool y
8 select OF
9 select OF_EARLY_FLATTREE
10 select IRQ_DOMAIN
11 select HAVE_MEMBLOCK
12 select ARCH_WANT_OPTIONAL_GPIOLIB
13 select HAVE_ARCH_TRACEHOOK
14 select HAVE_GENERIC_HARDIRQS
15 select GENERIC_IRQ_CHIP
16 select GENERIC_IRQ_PROBE
17 select GENERIC_IRQ_SHOW
18 select GENERIC_IOMAP
19 select GENERIC_CPU_DEVICES
20 select GENERIC_ATOMIC64
21 select GENERIC_CLOCKEVENTS
22 select GENERIC_STRNCPY_FROM_USER
23 select GENERIC_STRNLEN_USER
24
25config MMU
26 def_bool y
27
28config SYMBOL_PREFIX
29 string
30 default ""
31
32config HAVE_DMA_ATTRS
33 def_bool y
34
35config UID16
36 def_bool y
37
38config RWSEM_GENERIC_SPINLOCK
39 def_bool y
40
41config RWSEM_XCHGADD_ALGORITHM
42 def_bool n
43
44config GENERIC_HWEIGHT
45 def_bool y
46
47config NO_IOPORT
48 def_bool y
49
50config GENERIC_GPIO
51 def_bool y
52
53config TRACE_IRQFLAGS_SUPPORT
54 def_bool y
55
56# For now, use generic checksum functions
57#These can be reimplemented in assembly later if so inclined
58config GENERIC_CSUM
59 def_bool y
60
61config GENERIC_FIND_NEXT_BIT
62 def_bool y
63
64source "init/Kconfig"
65
66
67menu "Processor type and features"
68
69choice
70 prompt "Subarchitecture"
71 default OR1K_1200
72
73config OR1K_1200
74 bool "OR1200"
75 help
76 Generic OpenRISC 1200 architecture
77
78endchoice
79
80config OPENRISC_BUILTIN_DTB
81 string "Builtin DTB"
82 default ""
83
84menu "Class II Instructions"
85
86config OPENRISC_HAVE_INST_FF1
87 bool "Have instruction l.ff1"
88 default y
89 help
90 Select this if your implementation has the Class II instruction l.ff1
91
92config OPENRISC_HAVE_INST_FL1
93 bool "Have instruction l.fl1"
94 default y
95 help
96 Select this if your implementation has the Class II instruction l.fl1
97
98config OPENRISC_HAVE_INST_MUL
99 bool "Have instruction l.mul for hardware multiply"
100 default y
101 help
102 Select this if your implementation has a hardware multiply instruction
103
104config OPENRISC_HAVE_INST_DIV
105 bool "Have instruction l.div for hardware divide"
106 default y
107 help
108 Select this if your implementation has a hardware divide instruction
109endmenu
110
111
112source kernel/Kconfig.hz
113source kernel/Kconfig.preempt
114source "mm/Kconfig"
115
116config OPENRISC_NO_SPR_SR_DSX
117 bool "use SPR_SR_DSX software emulation" if OR1K_1200
118 default y
119 help
120 SPR_SR_DSX bit is status register bit indicating whether
121 the last exception has happened in delay slot.
122
123 OpenRISC architecture makes it optional to have it implemented
124 in hardware and the OR1200 does not have it.
125
126 Say N here if you know that your OpenRISC processor has
127 SPR_SR_DSX bit implemented. Say Y if you are unsure.
128
129config CMDLINE
130 string "Default kernel command string"
131 default ""
132 help
133 On some architectures there is currently no way for the boot loader
134 to pass arguments to the kernel. For these architectures, you should
135 supply some command-line options at build time by entering them
136 here.
137
138menu "Debugging options"
139
140config DEBUG_STACKOVERFLOW
141 bool "Check for kernel stack overflow"
142 default y
143 help
144 Make extra checks for space available on stack in some
145 critical functions. This will cause kernel to run a bit slower,
146 but will catch most of kernel stack overruns and exit gracefuly.
147
148 Say Y if you are unsure.
149
150config JUMP_UPON_UNHANDLED_EXCEPTION
151 bool "Try to die gracefully"
152 default y
153 help
154 Now this puts kernel into infinite loop after first oops. Till
155 your kernel crashes this doesn't have any influence.
156
157 Say Y if you are unsure.
158
159config OPENRISC_ESR_EXCEPTION_BUG_CHECK
160 bool "Check for possible ESR exception bug"
161 default n
162 help
163 This option enables some checks that might expose some problems
164 in kernel.
165
166 Say N if you are unsure.
167
168endmenu
169
170endmenu
171
172menu "Executable file formats"
173
174source "fs/Kconfig.binfmt"
175
176endmenu
177
178source "net/Kconfig"
179
180source "drivers/Kconfig"
181
182source "fs/Kconfig"
183
184source "security/Kconfig"
185
186source "crypto/Kconfig"
187
188source "lib/Kconfig"
189
190menu "Kernel hacking"
191
192source "lib/Kconfig.debug"
193
194endmenu