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

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