linux/arch/metag/Kconfig
<<
>>
Prefs
   1config 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_GENERIC_HARDIRQS
  17        select HAVE_KERNEL_BZIP2
  18        select HAVE_KERNEL_GZIP
  19        select HAVE_KERNEL_LZO
  20        select HAVE_KERNEL_XZ
  21        select HAVE_MEMBLOCK
  22        select HAVE_MEMBLOCK_NODE_MAP
  23        select HAVE_MOD_ARCH_SPECIFIC
  24        select HAVE_OPROFILE
  25        select HAVE_PERF_EVENTS
  26        select HAVE_SYSCALL_TRACEPOINTS
  27        select HAVE_UNDERSCORE_SYMBOL_PREFIX
  28        select IRQ_DOMAIN
  29        select MODULES_USE_ELF_RELA
  30        select OF
  31        select OF_EARLY_FLATTREE
  32        select SPARSE_IRQ
  33        select HAVE_DEBUG_STACKOVERFLOW
  34
  35config STACKTRACE_SUPPORT
  36        def_bool y
  37
  38config LOCKDEP_SUPPORT
  39        def_bool y
  40
  41config HAVE_LATENCYTOP_SUPPORT
  42        def_bool y
  43
  44config RWSEM_GENERIC_SPINLOCK
  45        def_bool y
  46
  47config RWSEM_XCHGADD_ALGORITHM
  48        bool
  49
  50config GENERIC_HWEIGHT
  51        def_bool y
  52
  53config GENERIC_CALIBRATE_DELAY
  54        def_bool y
  55
  56config NO_IOPORT
  57        def_bool y
  58
  59source "init/Kconfig"
  60
  61source "kernel/Kconfig.freezer"
  62
  63menu "Processor type and features"
  64
  65config MMU
  66        def_bool y
  67
  68config STACK_GROWSUP
  69        def_bool y
  70
  71config HOTPLUG_CPU
  72        bool "Enable CPU hotplug support"
  73        depends on SMP
  74        help
  75          Say Y here to allow turning CPUs off and on. CPUs can be
  76          controlled through /sys/devices/system/cpu.
  77
  78          Say N if you want to disable CPU hotplug.
  79
  80config HIGHMEM
  81        bool "High Memory Support"
  82        help
  83          The address space of Meta processors is only 4 Gigabytes large
  84          and it has to accommodate user address space, kernel address
  85          space as well as some memory mapped IO. That means that, if you
  86          have a large amount of physical memory and/or IO, not all of the
  87          memory can be "permanently mapped" by the kernel. The physical
  88          memory that is not permanently mapped is called "high memory".
  89
  90          Depending on the selected kernel/user memory split, minimum
  91          vmalloc space and actual amount of RAM, you may not need this
  92          option which should result in a slightly faster kernel.
  93
  94          If unsure, say n.
  95
  96source "arch/metag/mm/Kconfig"
  97
  98source "arch/metag/Kconfig.soc"
  99
 100config METAG_META12
 101        bool
 102        help
 103          Select this from the SoC config symbol to indicate that it contains a
 104          Meta 1.2 core.
 105
 106config METAG_META21
 107        bool
 108        help
 109          Select this from the SoC config symbol to indicate that it contains a
 110          Meta 2.1 core.
 111
 112config SMP
 113        bool "Symmetric multi-processing support"
 114        depends on METAG_META21 && METAG_META21_MMU
 115        select USE_GENERIC_SMP_HELPERS
 116        help
 117          This enables support for systems with more than one thread running
 118          Linux. If you have a system with only one thread running Linux,
 119          say N. Otherwise, say Y.
 120
 121config NR_CPUS
 122        int "Maximum number of CPUs (2-4)" if SMP
 123        range 2 4 if SMP
 124        default "1" if !SMP
 125        default "4" if SMP
 126
 127config METAG_SMP_WRITE_REORDERING
 128        bool
 129        help
 130          This attempts to prevent cache-memory incoherence due to external
 131          reordering of writes from different hardware threads when SMP is
 132          enabled. It adds fences (system event 0) to smp_mb and smp_rmb in an
 133          attempt to catch some of the cases, and also before writes to shared
 134          memory in LOCK1 protected atomics and spinlocks.
 135          This will not completely prevent cache incoherency on affected cores.
 136
 137config METAG_LNKGET_AROUND_CACHE
 138        bool
 139        depends on METAG_META21
 140        help
 141          This indicates that the LNKGET/LNKSET instructions go around the
 142          cache, which requires some extra cache flushes when the memory needs
 143          to be accessed by normal GET/SET instructions too.
 144
 145choice
 146        prompt "Atomicity primitive"
 147        default METAG_ATOMICITY_LNKGET
 148        help
 149          This option selects the mechanism for performing atomic operations.
 150
 151config METAG_ATOMICITY_IRQSOFF
 152        depends on !SMP
 153        bool "irqsoff"
 154        help
 155          This option disables interrupts to achieve atomicity. This mechanism
 156          is not SMP-safe.
 157
 158config METAG_ATOMICITY_LNKGET
 159        depends on METAG_META21
 160        bool "lnkget/lnkset"
 161        help
 162          This option uses the LNKGET and LNKSET instructions to achieve
 163          atomicity. LNKGET/LNKSET are load-link/store-conditional instructions.
 164          Choose this option if your system requires low latency.
 165
 166config METAG_ATOMICITY_LOCK1
 167        depends on SMP
 168        bool "lock1"
 169        help
 170          This option uses the LOCK1 instruction for atomicity. This is mainly
 171          provided as a debugging aid if the lnkget/lnkset atomicity primitive
 172          isn't working properly.
 173
 174endchoice
 175
 176config METAG_FPU
 177        bool "FPU Support"
 178        depends on METAG_META21
 179        default y
 180        help
 181          This option allows processes to use FPU hardware available with this
 182          CPU. If this option is not enabled FPU registers will not be saved
 183          and restored on context-switch.
 184
 185          If you plan on running programs which are compiled to use hard floats
 186          say Y here.
 187
 188config METAG_DSP
 189        bool "DSP Support"
 190        help
 191          This option allows processes to use DSP hardware available
 192          with this CPU. If this option is not enabled DSP registers
 193          will not be saved and restored on context-switch.
 194
 195          If you plan on running DSP programs say Y here.
 196
 197config METAG_PERFCOUNTER_IRQS
 198        bool "PerfCounters interrupt support"
 199        depends on METAG_META21
 200        help
 201          This option enables using interrupts to collect information from
 202          Performance Counters. This option is supported in new META21
 203          (starting from HTP265).
 204
 205          When disabled, Performance Counters information will be collected
 206          based on Timer Interrupt.
 207
 208config HW_PERF_EVENTS
 209        def_bool METAG_PERFCOUNTER_IRQS && PERF_EVENTS
 210
 211config METAG_DA
 212        bool "DA support"
 213        help
 214          Say Y if you plan to use a DA debug adapter with Linux. The presence
 215          of the DA will be detected automatically at boot, so it is safe to say
 216          Y to this option even when booting without a DA.
 217
 218          This enables support for services provided by DA JTAG debug adapters,
 219          such as:
 220          - communication over DA channels (such as the console driver).
 221          - use of the DA filesystem.
 222
 223menu "Boot options"
 224
 225config METAG_BUILTIN_DTB
 226        bool "Embed DTB in kernel image"
 227        default y
 228        help
 229          Embeds a device tree binary in the kernel image.
 230
 231config METAG_BUILTIN_DTB_NAME
 232        string "Built in DTB"
 233        depends on METAG_BUILTIN_DTB
 234        help
 235          Set the name of the DTB to embed (leave blank to pick one
 236          automatically based on kernel configuration).
 237
 238config CMDLINE_BOOL
 239        bool "Default bootloader kernel arguments"
 240
 241config CMDLINE
 242        string "Kernel command line"
 243        depends on CMDLINE_BOOL
 244        help
 245          On some architectures there is currently no way for the boot loader
 246          to pass arguments to the kernel. For these architectures, you should
 247          supply some command-line options at build time by entering them
 248          here.
 249
 250config CMDLINE_FORCE
 251        bool "Force default kernel command string"
 252        depends on CMDLINE_BOOL
 253        help
 254          Set this to have arguments from the default kernel command string
 255          override those passed by the boot loader.
 256
 257endmenu
 258
 259source "kernel/Kconfig.preempt"
 260
 261source kernel/Kconfig.hz
 262
 263endmenu
 264
 265menu "Power management options"
 266
 267source kernel/power/Kconfig
 268
 269endmenu
 270
 271menu "Executable file formats"
 272
 273source "fs/Kconfig.binfmt"
 274
 275endmenu
 276
 277source "net/Kconfig"
 278
 279source "drivers/Kconfig"
 280
 281source "fs/Kconfig"
 282
 283source "arch/metag/Kconfig.debug"
 284
 285source "security/Kconfig"
 286
 287source "crypto/Kconfig"
 288
 289source "lib/Kconfig"
 290
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.