1
2config METAG
3 def_bool y
4 select EMBEDDED
5 select GENERIC_ATOMIC64
6 select GENERIC_CLOCKEVENTS
7 select GENERIC_IRQ_SHOW
8 select GENERIC_SMP_IDLE_THREAD
9 select HAVE_64BIT_ALIGNED_ACCESS
10 select HAVE_ARCH_TRACEHOOK
11 select HAVE_C_RECORDMCOUNT
12 select HAVE_DEBUG_KMEMLEAK
13 select HAVE_DEBUG_STACKOVERFLOW
14 select HAVE_DYNAMIC_FTRACE
15 select HAVE_EXIT_THREAD
16 select HAVE_FTRACE_MCOUNT_RECORD
17 select HAVE_FUNCTION_TRACER
18 select HAVE_KERNEL_BZIP2
19 select HAVE_KERNEL_GZIP
20 select HAVE_KERNEL_LZO
21 select HAVE_KERNEL_XZ
22 select HAVE_MEMBLOCK
23 select HAVE_MEMBLOCK_NODE_MAP
24 select HAVE_MOD_ARCH_SPECIFIC
25 select HAVE_OPROFILE
26 select HAVE_PERF_EVENTS
27 select HAVE_SYSCALL_TRACEPOINTS
28 select HAVE_UNDERSCORE_SYMBOL_PREFIX
29 select IRQ_DOMAIN
30 select GENERIC_IRQ_EFFECTIVE_AFF_MASK
31 select MODULES_USE_ELF_RELA
32 select OF
33 select OF_EARLY_FLATTREE
34 select SPARSE_IRQ
35 select CPU_NO_EFFICIENT_FFS
36
37config STACKTRACE_SUPPORT
38 def_bool y
39
40config LOCKDEP_SUPPORT
41 def_bool y
42
43config RWSEM_GENERIC_SPINLOCK
44 def_bool y
45
46config RWSEM_XCHGADD_ALGORITHM
47 bool
48
49config GENERIC_HWEIGHT
50 def_bool y
51
52config GENERIC_CALIBRATE_DELAY
53 def_bool y
54
55config NO_IOPORT_MAP
56 def_bool y
57
58source "init/Kconfig"
59
60source "kernel/Kconfig.freezer"
61
62menu "Processor type and features"
63
64config MMU
65 def_bool y
66
67config STACK_GROWSUP
68 def_bool y
69
70config HOTPLUG_CPU
71 bool "Enable CPU hotplug support"
72 depends on SMP
73 help
74 Say Y here to allow turning CPUs off and on. CPUs can be
75 controlled through /sys/devices/system/cpu.
76
77 Say N if you want to disable CPU hotplug.
78
79config HIGHMEM
80 bool "High Memory Support"
81 help
82 The address space of Meta processors is only 4 Gigabytes large
83 and it has to accommodate user address space, kernel address
84 space as well as some memory mapped IO. That means that, if you
85 have a large amount of physical memory and/or IO, not all of the
86 memory can be "permanently mapped" by the kernel. The physical
87 memory that is not permanently mapped is called "high memory".
88
89 Depending on the selected kernel/user memory split, minimum
90 vmalloc space and actual amount of RAM, you may not need this
91 option which should result in a slightly faster kernel.
92
93 If unsure, say n.
94
95source "arch/metag/mm/Kconfig"
96
97source "arch/metag/Kconfig.soc"
98
99config METAG_META12
100 bool
101 help
102 Select this from the SoC config symbol to indicate that it contains a
103 Meta 1.2 core.
104
105config METAG_META21
106 bool
107 help
108 Select this from the SoC config symbol to indicate that it contains a
109 Meta 2.1 core.
110
111config SMP
112 bool "Symmetric multi-processing support"
113 depends on METAG_META21 && METAG_META21_MMU
114 help
115 This enables support for systems with more than one thread running
116 Linux. If you have a system with only one thread running Linux,
117 say N. Otherwise, say Y.
118
119config NR_CPUS
120 int "Maximum number of CPUs (2-4)" if SMP
121 range 2 4 if SMP
122 default "1" if !SMP
123 default "4" if SMP
124
125config METAG_SMP_WRITE_REORDERING
126 bool
127 help
128 This attempts to prevent cache-memory incoherence due to external
129 reordering of writes from different hardware threads when SMP is
130 enabled. It adds fences (system event 0) to smp_mb and smp_rmb in an
131 attempt to catch some of the cases, and also before writes to shared
132 memory in LOCK1 protected atomics and spinlocks.
133 This will not completely prevent cache incoherency on affected cores.
134
135config METAG_LNKGET_AROUND_CACHE
136 bool
137 depends on METAG_META21
138 help
139 This indicates that the LNKGET/LNKSET instructions go around the
140 cache, which requires some extra cache flushes when the memory needs
141 to be accessed by normal GET/SET instructions too.
142
143choice
144 prompt "Atomicity primitive"
145 default METAG_ATOMICITY_LNKGET
146 help
147 This option selects the mechanism for performing atomic operations.
148
149config METAG_ATOMICITY_IRQSOFF
150 depends on !SMP
151 bool "irqsoff"
152 help
153 This option disables interrupts to achieve atomicity. This mechanism
154 is not SMP-safe.
155
156config METAG_ATOMICITY_LNKGET
157 depends on METAG_META21
158 bool "lnkget/lnkset"
159 help
160 This option uses the LNKGET and LNKSET instructions to achieve
161 atomicity. LNKGET/LNKSET are load-link/store-conditional instructions.
162 Choose this option if your system requires low latency.
163
164config METAG_ATOMICITY_LOCK1
165 depends on SMP
166 bool "lock1"
167 help
168 This option uses the LOCK1 instruction for atomicity. This is mainly
169 provided as a debugging aid if the lnkget/lnkset atomicity primitive
170 isn't working properly.
171
172endchoice
173
174config METAG_FPU
175 bool "FPU Support"
176 depends on METAG_META21
177 default y
178 help
179 This option allows processes to use FPU hardware available with this
180 CPU. If this option is not enabled FPU registers will not be saved
181 and restored on context-switch.
182
183 If you plan on running programs which are compiled to use hard floats
184 say Y here.
185
186config METAG_DSP
187 bool "DSP Support"
188 help
189 This option allows processes to use DSP hardware available
190 with this CPU. If this option is not enabled DSP registers
191 will not be saved and restored on context-switch.
192
193 If you plan on running DSP programs say Y here.
194
195config METAG_PERFCOUNTER_IRQS
196 bool "PerfCounters interrupt support"
197 depends on METAG_META21
198 help
199 This option enables using interrupts to collect information from
200 Performance Counters. This option is supported in new META21
201 (starting from HTP265).
202
203 When disabled, Performance Counters information will be collected
204 based on Timer Interrupt.
205
206config HW_PERF_EVENTS
207 def_bool METAG_PERFCOUNTER_IRQS && PERF_EVENTS
208
209config METAG_DA
210 bool "DA support"
211 help
212 Say Y if you plan to use a DA debug adapter with Linux. The presence
213 of the DA will be detected automatically at boot, so it is safe to say
214 Y to this option even when booting without a DA.
215
216 This enables support for services provided by DA JTAG debug adapters,
217 such as:
218 - communication over DA channels (such as the console driver).
219 - use of the DA filesystem.
220
221menu "Boot options"
222
223config METAG_BUILTIN_DTB
224 bool "Embed DTB in kernel image"
225 default y
226 help
227 Embeds a device tree binary in the kernel image.
228
229config METAG_BUILTIN_DTB_NAME
230 string "Built in DTB"
231 depends on METAG_BUILTIN_DTB
232 help
233 Set the name of the DTB to embed (leave blank to pick one
234 automatically based on kernel configuration).
235
236config CMDLINE_BOOL
237 bool "Default bootloader kernel arguments"
238
239config CMDLINE
240 string "Kernel command line"
241 depends on CMDLINE_BOOL
242 help
243 On some architectures there is currently no way for the boot loader
244 to pass arguments to the kernel. For these architectures, you should
245 supply some command-line options at build time by entering them
246 here.
247
248config CMDLINE_FORCE
249 bool "Force default kernel command string"
250 depends on CMDLINE_BOOL
251 help
252 Set this to have arguments from the default kernel command string
253 override those passed by the boot loader.
254
255endmenu
256
257source "kernel/Kconfig.preempt"
258
259source kernel/Kconfig.hz
260
261endmenu
262
263menu "Power management options"
264
265source kernel/power/Kconfig
266
267endmenu
268
269menu "Executable file formats"
270
271source "fs/Kconfig.binfmt"
272
273endmenu
274
275source "net/Kconfig"
276
277source "drivers/Kconfig"
278
279source "fs/Kconfig"
280
281source "arch/metag/Kconfig.debug"
282
283source "security/Kconfig"
284
285source "crypto/Kconfig"
286
287source "lib/Kconfig"
288
