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