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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 OF
14 select OF_EARLY_FLATTREE
15 select IRQ_DOMAIN
16 select GPIOLIB
17 select HAVE_ARCH_TRACEHOOK
18 select SPARSE_IRQ
19 select GENERIC_IRQ_CHIP
20 select GENERIC_IRQ_PROBE
21 select GENERIC_IRQ_SHOW
22 select GENERIC_IOMAP
23 select GENERIC_CPU_DEVICES
24 select HAVE_UID16
25 select GENERIC_ATOMIC64
26 select GENERIC_CLOCKEVENTS_BROADCAST
27 select GENERIC_SMP_IDLE_THREAD
28 select MODULES_USE_ELF_RELA
29 select HAVE_DEBUG_STACKOVERFLOW
30 select OR1K_PIC
31 select CPU_NO_EFFICIENT_FFS if !OPENRISC_HAVE_INST_FF1
32 select ARCH_USE_QUEUED_SPINLOCKS
33 select ARCH_USE_QUEUED_RWLOCKS
34 select OMPIC if SMP
35 select ARCH_WANT_FRAME_POINTERS
36 select GENERIC_IRQ_MULTI_HANDLER
37 select MMU_GATHER_NO_RANGE if MMU
38 select SET_FS
39 select TRACE_IRQFLAGS_SUPPORT
40
41config CPU_BIG_ENDIAN
42 def_bool y
43
44config MMU
45 def_bool y
46
47config GENERIC_HWEIGHT
48 def_bool y
49
50config NO_IOPORT_MAP
51 def_bool y
52
53
54
55config GENERIC_CSUM
56 def_bool y
57
58config STACKTRACE_SUPPORT
59 def_bool y
60
61config LOCKDEP_SUPPORT
62 def_bool y
63
64menu "Processor type and features"
65
66choice
67 prompt "Subarchitecture"
68 default OR1K_1200
69
70config OR1K_1200
71 bool "OR1200"
72 help
73 Generic OpenRISC 1200 architecture
74
75endchoice
76
77config DCACHE_WRITETHROUGH
78 bool "Have write through data caches"
79 default n
80 help
81 Select this if your implementation features write through data caches.
82 Selecting 'N' here will allow the kernel to force flushing of data
83 caches at relevant times. Most OpenRISC implementations support write-
84 through data caches.
85
86 If unsure say N here
87
88config OPENRISC_BUILTIN_DTB
89 string "Builtin DTB"
90 default ""
91
92menu "Class II Instructions"
93
94config OPENRISC_HAVE_INST_FF1
95 bool "Have instruction l.ff1"
96 default y
97 help
98 Select this if your implementation has the Class II instruction l.ff1
99
100config OPENRISC_HAVE_INST_FL1
101 bool "Have instruction l.fl1"
102 default y
103 help
104 Select this if your implementation has the Class II instruction l.fl1
105
106config OPENRISC_HAVE_INST_MUL
107 bool "Have instruction l.mul for hardware multiply"
108 default y
109 help
110 Select this if your implementation has a hardware multiply instruction
111
112config OPENRISC_HAVE_INST_DIV
113 bool "Have instruction l.div for hardware divide"
114 default y
115 help
116 Select this if your implementation has a hardware divide instruction
117endmenu
118
119config NR_CPUS
120 int "Maximum number of CPUs (2-32)"
121 range 2 32
122 depends on SMP
123 default "2"
124
125config SMP
126 bool "Symmetric Multi-Processing support"
127 help
128 This enables support for systems with more than one CPU. If you have
129 a system with only one CPU, say N. If you have a system with more
130 than one CPU, say Y.
131
132 If you don't know what to do here, say N.
133
134source "kernel/Kconfig.hz"
135
136config OPENRISC_NO_SPR_SR_DSX
137 bool "use SPR_SR_DSX software emulation" if OR1K_1200
138 default y
139 help
140 SPR_SR_DSX bit is status register bit indicating whether
141 the last exception has happened in delay slot.
142
143 OpenRISC architecture makes it optional to have it implemented
144 in hardware and the OR1200 does not have it.
145
146 Say N here if you know that your OpenRISC processor has
147 SPR_SR_DSX bit implemented. Say Y if you are unsure.
148
149config OPENRISC_HAVE_SHADOW_GPRS
150 bool "Support for shadow gpr files" if !SMP
151 default y if SMP
152 help
153 Say Y here if your OpenRISC processor features shadowed
154 register files. They will in such case be used as a
155 scratch reg storage on exception entry.
156
157 On SMP systems, this feature is mandatory.
158 On a unicore system it's safe to say N here if you are unsure.
159
160config CMDLINE
161 string "Default kernel command string"
162 default ""
163 help
164 On some architectures there is currently no way for the boot loader
165 to pass arguments to the kernel. For these architectures, you should
166 supply some command-line options at build time by entering them
167 here.
168
169menu "Debugging options"
170
171config JUMP_UPON_UNHANDLED_EXCEPTION
172 bool "Try to die gracefully"
173 default y
174 help
175 Now this puts kernel into infinite loop after first oops. Till
176 your kernel crashes this doesn't have any influence.
177
178 Say Y if you are unsure.
179
180config OPENRISC_ESR_EXCEPTION_BUG_CHECK
181 bool "Check for possible ESR exception bug"
182 default n
183 help
184 This option enables some checks that might expose some problems
185 in kernel.
186
187 Say N if you are unsure.
188
189endmenu
190
191endmenu
192
