1 # SPDX-License-Identifier: GPL-2.0
3 # For a description of the syntax of this configuration file,
4 # see Documentation/kbuild/kconfig-language.txt.
10 select OF_EARLY_FLATTREE
12 select HANDLE_DOMAIN_IRQ
15 select HAVE_ARCH_TRACEHOOK
17 select GENERIC_IRQ_CHIP
18 select GENERIC_IRQ_PROBE
19 select GENERIC_IRQ_SHOW
21 select GENERIC_CPU_DEVICES
23 select GENERIC_ATOMIC64
24 select GENERIC_CLOCKEVENTS
25 select GENERIC_CLOCKEVENTS_BROADCAST
26 select GENERIC_STRNCPY_FROM_USER
27 select GENERIC_STRNLEN_USER
28 select GENERIC_SMP_IDLE_THREAD
29 select MODULES_USE_ELF_RELA
30 select HAVE_DEBUG_STACKOVERFLOW
32 select CPU_NO_EFFICIENT_FFS if !OPENRISC_HAVE_INST_FF1
34 select ARCH_USE_QUEUED_SPINLOCKS
35 select ARCH_USE_QUEUED_RWLOCKS
37 select ARCH_WANT_FRAME_POINTERS
38 select GENERIC_IRQ_MULTI_HANDLER
46 config RWSEM_GENERIC_SPINLOCK
49 config RWSEM_XCHGADD_ALGORITHM
52 config GENERIC_HWEIGHT
58 config TRACE_IRQFLAGS_SUPPORT
61 # For now, use generic checksum functions
62 #These can be reimplemented in assembly later if so inclined
66 config STACKTRACE_SUPPORT
69 config LOCKDEP_SUPPORT
74 source "kernel/Kconfig.freezer"
76 menu "Processor type and features"
79 prompt "Subarchitecture"
85 Generic OpenRISC 1200 architecture
89 config DCACHE_WRITETHROUGH
90 bool "Have write through data caches"
93 Select this if your implementation features write through data caches.
94 Selecting 'N' here will allow the kernel to force flushing of data
95 caches at relevant times. Most OpenRISC implementations support write-
100 config OPENRISC_BUILTIN_DTB
104 menu "Class II Instructions"
106 config OPENRISC_HAVE_INST_FF1
107 bool "Have instruction l.ff1"
110 Select this if your implementation has the Class II instruction l.ff1
112 config OPENRISC_HAVE_INST_FL1
113 bool "Have instruction l.fl1"
116 Select this if your implementation has the Class II instruction l.fl1
118 config OPENRISC_HAVE_INST_MUL
119 bool "Have instruction l.mul for hardware multiply"
122 Select this if your implementation has a hardware multiply instruction
124 config OPENRISC_HAVE_INST_DIV
125 bool "Have instruction l.div for hardware divide"
128 Select this if your implementation has a hardware divide instruction
132 int "Maximum number of CPUs (2-32)"
138 bool "Symmetric Multi-Processing support"
140 This enables support for systems with more than one CPU. If you have
141 a system with only one CPU, say N. If you have a system with more
144 If you don't know what to do here, say N.
146 source kernel/Kconfig.hz
147 source kernel/Kconfig.preempt
150 config OPENRISC_NO_SPR_SR_DSX
151 bool "use SPR_SR_DSX software emulation" if OR1K_1200
154 SPR_SR_DSX bit is status register bit indicating whether
155 the last exception has happened in delay slot.
157 OpenRISC architecture makes it optional to have it implemented
158 in hardware and the OR1200 does not have it.
160 Say N here if you know that your OpenRISC processor has
161 SPR_SR_DSX bit implemented. Say Y if you are unsure.
163 config OPENRISC_HAVE_SHADOW_GPRS
164 bool "Support for shadow gpr files" if !SMP
167 Say Y here if your OpenRISC processor features shadowed
168 register files. They will in such case be used as a
169 scratch reg storage on exception entry.
171 On SMP systems, this feature is mandatory.
172 On a unicore system it's safe to say N here if you are unsure.
175 string "Default kernel command string"
178 On some architectures there is currently no way for the boot loader
179 to pass arguments to the kernel. For these architectures, you should
180 supply some command-line options at build time by entering them
183 menu "Debugging options"
185 config JUMP_UPON_UNHANDLED_EXCEPTION
186 bool "Try to die gracefully"
189 Now this puts kernel into infinite loop after first oops. Till
190 your kernel crashes this doesn't have any influence.
192 Say Y if you are unsure.
194 config OPENRISC_ESR_EXCEPTION_BUG_CHECK
195 bool "Check for possible ESR exception bug"
198 This option enables some checks that might expose some problems
201 Say N if you are unsure.
207 menu "Executable file formats"
209 source "fs/Kconfig.binfmt"
215 source "drivers/Kconfig"
219 source "security/Kconfig"
221 source "crypto/Kconfig"
225 menu "Kernel hacking"
227 source "lib/Kconfig.debug"