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Linux/arch/metag/Kconfig

  1 config METAG
  2         def_bool y
  3         select EMBEDDED
  4         select GENERIC_ATOMIC64
  5         select GENERIC_CLOCKEVENTS
  6         select GENERIC_IRQ_SHOW
  7         select GENERIC_SMP_IDLE_THREAD
  8         select HAVE_64BIT_ALIGNED_ACCESS
  9         select HAVE_ARCH_TRACEHOOK
 10         select HAVE_C_RECORDMCOUNT
 11         select HAVE_DEBUG_KMEMLEAK
 12         select HAVE_DYNAMIC_FTRACE
 13         select HAVE_FTRACE_MCOUNT_RECORD
 14         select HAVE_FUNCTION_TRACER
 15         select HAVE_FUNCTION_TRACE_MCOUNT_TEST
 16         select HAVE_KERNEL_BZIP2
 17         select HAVE_KERNEL_GZIP
 18         select HAVE_KERNEL_LZO
 19         select HAVE_KERNEL_XZ
 20         select HAVE_MEMBLOCK
 21         select HAVE_MEMBLOCK_NODE_MAP
 22         select HAVE_MOD_ARCH_SPECIFIC
 23         select HAVE_OPROFILE
 24         select HAVE_PERF_EVENTS
 25         select HAVE_SYSCALL_TRACEPOINTS
 26         select HAVE_UNDERSCORE_SYMBOL_PREFIX
 27         select IRQ_DOMAIN
 28         select MODULES_USE_ELF_RELA
 29         select OF
 30         select OF_EARLY_FLATTREE
 31         select SPARSE_IRQ
 32         select HAVE_DEBUG_STACKOVERFLOW
 33 
 34 config STACKTRACE_SUPPORT
 35         def_bool y
 36 
 37 config LOCKDEP_SUPPORT
 38         def_bool y
 39 
 40 config HAVE_LATENCYTOP_SUPPORT
 41         def_bool y
 42 
 43 config RWSEM_GENERIC_SPINLOCK
 44         def_bool y
 45 
 46 config RWSEM_XCHGADD_ALGORITHM
 47         bool
 48 
 49 config GENERIC_HWEIGHT
 50         def_bool y
 51 
 52 config GENERIC_CALIBRATE_DELAY
 53         def_bool y
 54 
 55 config NO_IOPORT
 56         def_bool y
 57 
 58 source "init/Kconfig"
 59 
 60 source "kernel/Kconfig.freezer"
 61 
 62 menu "Processor type and features"
 63 
 64 config MMU
 65         def_bool y
 66 
 67 config STACK_GROWSUP
 68         def_bool y
 69 
 70 config 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 
 79 config 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 
 95 source "arch/metag/mm/Kconfig"
 96 
 97 source "arch/metag/Kconfig.soc"
 98 
 99 config 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 
105 config 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 
111 config 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 
119 config 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 
125 config 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 
135 config 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 
143 choice
144         prompt "Atomicity primitive"
145         default METAG_ATOMICITY_LNKGET
146         help
147           This option selects the mechanism for performing atomic operations.
148 
149 config 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 
156 config 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 
164 config 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 
172 endchoice
173 
174 config 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 
186 config 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 
195 config 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 
206 config HW_PERF_EVENTS
207         def_bool METAG_PERFCOUNTER_IRQS && PERF_EVENTS
208 
209 config 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 
221 menu "Boot options"
222 
223 config 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 
229 config 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 
236 config CMDLINE_BOOL
237         bool "Default bootloader kernel arguments"
238 
239 config 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 
248 config 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 
255 endmenu
256 
257 source "kernel/Kconfig.preempt"
258 
259 source kernel/Kconfig.hz
260 
261 endmenu
262 
263 menu "Power management options"
264 
265 source kernel/power/Kconfig
266 
267 endmenu
268 
269 menu "Executable file formats"
270 
271 source "fs/Kconfig.binfmt"
272 
273 endmenu
274 
275 source "net/Kconfig"
276 
277 source "drivers/Kconfig"
278 
279 source "fs/Kconfig"
280 
281 source "arch/metag/Kconfig.debug"
282 
283 source "security/Kconfig"
284 
285 source "crypto/Kconfig"
286 
287 source "lib/Kconfig"

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