arch/metag/Kconfig

   1 config SYMBOL_PREFIX
   2         string
   3         default "_"
   4
   5 config METAG
   6         def_bool y
   7         select EMBEDDED
   8         select GENERIC_ATOMIC64
   9         select GENERIC_CLOCKEVENTS
  10         select GENERIC_IRQ_SHOW
  11         select GENERIC_SMP_IDLE_THREAD
  12         select HAVE_64BIT_ALIGNED_ACCESS
  13         select HAVE_ARCH_TRACEHOOK
  14         select HAVE_C_RECORDMCOUNT
  15         select HAVE_DEBUG_KMEMLEAK
  16         select HAVE_DYNAMIC_FTRACE
  17         select HAVE_FTRACE_MCOUNT_RECORD
  18         select HAVE_FUNCTION_TRACER
  19         select HAVE_FUNCTION_TRACE_MCOUNT_TEST
  20         select HAVE_GENERIC_HARDIRQS
  21         select HAVE_KERNEL_BZIP2
  22         select HAVE_KERNEL_GZIP
  23         select HAVE_KERNEL_LZO
  24         select HAVE_KERNEL_XZ
  25         select HAVE_MEMBLOCK
  26         select HAVE_MEMBLOCK_NODE_MAP
  27         select HAVE_MOD_ARCH_SPECIFIC
  28         select HAVE_OPROFILE
  29         select HAVE_PERF_EVENTS
  30         select HAVE_SYSCALL_TRACEPOINTS
  31         select IRQ_DOMAIN
  32         select MODULES_USE_ELF_RELA
  33         select OF
  34         select OF_EARLY_FLATTREE
  35         select SPARSE_IRQ
  36
  37 config STACKTRACE_SUPPORT
  38         def_bool y
  39
  40 config LOCKDEP_SUPPORT
  41         def_bool y
  42
  43 config HAVE_LATENCYTOP_SUPPORT
  44         def_bool y
  45
  46 config RWSEM_GENERIC_SPINLOCK
  47         def_bool y
  48
  49 config RWSEM_XCHGADD_ALGORITHM
  50         bool
  51
  52 config GENERIC_HWEIGHT
  53         def_bool y
  54
  55 config GENERIC_CALIBRATE_DELAY
  56         def_bool y
  57
  58 config GENERIC_GPIO
  59         def_bool n
  60
  61 config NO_IOPORT
  62         def_bool y
  63
  64 source "init/Kconfig"
  65
  66 source "kernel/Kconfig.freezer"
  67
  68 menu "Processor type and features"
  69
  70 config MMU
  71         def_bool y
  72
  73 config STACK_GROWSUP
  74         def_bool y
  75
  76 config HOTPLUG_CPU
  77         bool "Enable CPU hotplug support"
  78         depends on SMP
  79         help
  80           Say Y here to allow turning CPUs off and on. CPUs can be
  81           controlled through /sys/devices/system/cpu.
  82
  83           Say N if you want to disable CPU hotplug.
  84
  85 config HIGHMEM
  86         bool "High Memory Support"
  87         help
  88           The address space of Meta processors is only 4 Gigabytes large
  89           and it has to accommodate user address space, kernel address
  90           space as well as some memory mapped IO. That means that, if you
  91           have a large amount of physical memory and/or IO, not all of the
  92           memory can be "permanently mapped" by the kernel. The physical
  93           memory that is not permanently mapped is called "high memory".
  94
  95           Depending on the selected kernel/user memory split, minimum
  96           vmalloc space and actual amount of RAM, you may not need this
  97           option which should result in a slightly faster kernel.
  98
  99           If unsure, say n.
 100
 101 source "arch/metag/mm/Kconfig"
 102
 103 source "arch/metag/Kconfig.soc"
 104
 105 config METAG_META12
 106         bool
 107         help
 108           Select this from the SoC config symbol to indicate that it contains a
 109           Meta 1.2 core.
 110
 111 config METAG_META21
 112         bool
 113         help
 114           Select this from the SoC config symbol to indicate that it contains a
 115           Meta 2.1 core.
 116
 117 config SMP
 118         bool "Symmetric multi-processing support"
 119         depends on METAG_META21 && METAG_META21_MMU
 120         select USE_GENERIC_SMP_HELPERS
 121         help
 122           This enables support for systems with more than one thread running
 123           Linux. If you have a system with only one thread running Linux,
 124           say N. Otherwise, say Y.
 125
 126 config NR_CPUS
 127         int "Maximum number of CPUs (2-4)" if SMP
 128         range 2 4 if SMP
 129         default "1" if !SMP
 130         default "4" if SMP
 131
 132 config METAG_SMP_WRITE_REORDERING
 133         bool
 134         help
 135           This attempts to prevent cache-memory incoherence due to external
 136           reordering of writes from different hardware threads when SMP is
 137           enabled. It adds fences (system event 0) to smp_mb and smp_rmb in an
 138           attempt to catch some of the cases, and also before writes to shared
 139           memory in LOCK1 protected atomics and spinlocks.
 140           This will not completely prevent cache incoherency on affected cores.
 141
 142 config METAG_LNKGET_AROUND_CACHE
 143         bool
 144         depends on METAG_META21
 145         help
 146           This indicates that the LNKGET/LNKSET instructions go around the
 147           cache, which requires some extra cache flushes when the memory needs
 148           to be accessed by normal GET/SET instructions too.
 149
 150 choice
 151         prompt "Atomicity primitive"
 152         default METAG_ATOMICITY_LNKGET
 153         help
 154           This option selects the mechanism for performing atomic operations.
 155
 156 config METAG_ATOMICITY_IRQSOFF
 157         depends on !SMP
 158         bool "irqsoff"
 159         help
 160           This option disables interrupts to achieve atomicity. This mechanism
 161           is not SMP-safe.
 162
 163 config METAG_ATOMICITY_LNKGET
 164         depends on METAG_META21
 165         bool "lnkget/lnkset"
 166         help
 167           This option uses the LNKGET and LNKSET instructions to achieve
 168           atomicity. LNKGET/LNKSET are load-link/store-conditional instructions.
 169           Choose this option if your system requires low latency.
 170
 171 config METAG_ATOMICITY_LOCK1
 172         depends on SMP
 173         bool "lock1"
 174         help
 175           This option uses the LOCK1 instruction for atomicity. This is mainly
 176           provided as a debugging aid if the lnkget/lnkset atomicity primitive
 177           isn't working properly.
 178
 179 endchoice
 180
 181 config METAG_FPU
 182         bool "FPU Support"
 183         depends on METAG_META21
 184         default y
 185         help
 186           This option allows processes to use FPU hardware available with this
 187           CPU. If this option is not enabled FPU registers will not be saved
 188           and restored on context-switch.
 189
 190           If you plan on running programs which are compiled to use hard floats
 191           say Y here.
 192
 193 config METAG_DSP
 194         bool "DSP Support"
 195         help
 196           This option allows processes to use DSP hardware available
 197           with this CPU. If this option is not enabled DSP registers
 198           will not be saved and restored on context-switch.
 199
 200           If you plan on running DSP programs say Y here.
 201
 202 config METAG_PERFCOUNTER_IRQS
 203         bool "PerfCounters interrupt support"
 204         depends on METAG_META21
 205         help
 206           This option enables using interrupts to collect information from
 207           Performance Counters. This option is supported in new META21
 208           (starting from HTP265).
 209
 210           When disabled, Performance Counters information will be collected
 211           based on Timer Interrupt.
 212
 213 config HW_PERF_EVENTS
 214         def_bool METAG_PERFCOUNTER_IRQS && PERF_EVENTS
 215
 216 config METAG_DA
 217         bool "DA support"
 218         help
 219           Say Y if you plan to use a DA debug adapter with Linux. The presence
 220           of the DA will be detected automatically at boot, so it is safe to say
 221           Y to this option even when booting without a DA.
 222
 223           This enables support for services provided by DA JTAG debug adapters,
 224           such as:
 225           - communication over DA channels (such as the console driver).
 226           - use of the DA filesystem.
 227
 228 menu "Boot options"
 229
 230 config METAG_BUILTIN_DTB
 231         bool "Embed DTB in kernel image"
 232         default y
 233         help
 234           Embeds a device tree binary in the kernel image.
 235
 236 config METAG_BUILTIN_DTB_NAME
 237         string "Built in DTB"
 238         depends on METAG_BUILTIN_DTB
 239         help
 240           Set the name of the DTB to embed (leave blank to pick one
 241           automatically based on kernel configuration).
 242
 243 config CMDLINE_BOOL
 244         bool "Default bootloader kernel arguments"
 245
 246 config CMDLINE
 247         string "Kernel command line"
 248         depends on CMDLINE_BOOL
 249         help
 250           On some architectures there is currently no way for the boot loader
 251           to pass arguments to the kernel. For these architectures, you should
 252           supply some command-line options at build time by entering them
 253           here.
 254
 255 config CMDLINE_FORCE
 256         bool "Force default kernel command string"
 257         depends on CMDLINE_BOOL
 258         help
 259           Set this to have arguments from the default kernel command string
 260           override those passed by the boot loader.
 261
 262 endmenu
 263
 264 source "kernel/Kconfig.preempt"
 265
 266 source kernel/Kconfig.hz
 267
 268 endmenu
 269
 270 menu "Power management options"
 271
 272 source kernel/power/Kconfig
 273
 274 endmenu
 275
 276 menu "Executable file formats"
 277
 278 source "fs/Kconfig.binfmt"
 279
 280 endmenu
 281
 282 source "net/Kconfig"
 283
 284 source "drivers/Kconfig"
 285
 286 source "fs/Kconfig"
 287
 288 source "arch/metag/Kconfig.debug"
 289
 290 source "security/Kconfig"
 291
 292 source "crypto/Kconfig"
 293
 294 source "lib/Kconfig"