target/linux/ubicom32/files/arch/ubicom32/Kconfig

   1 #
   2 # For a description of the syntax of this configuration file,
   3 # see Documentation/kbuild/kconfig-language.txt.
   4 #
   5
   6 mainmenu "uClinux/ubicom32 (w/o MMU) Kernel Configuration"
   7
   8 config UBICOM32
   9         bool
  10         select HAVE_OPROFILE
  11         default y
  12
  13 config RAMKERNEL
  14         bool
  15         default y
  16
  17 config CPU_BIG_ENDIAN
  18         bool
  19         default y
  20
  21 config FORCE_MAX_ZONEORDER
  22         int
  23         default "14"
  24
  25 config HAVE_CLK
  26         bool
  27         default y
  28
  29 config MMU
  30         bool
  31         default n
  32
  33 config FPU
  34         bool
  35         default n
  36
  37 config ZONE_DMA
  38         bool
  39         default y
  40
  41 config RWSEM_GENERIC_SPINLOCK
  42         bool
  43         default y
  44
  45 config RWSEM_XCHGADD_ALGORITHM
  46         bool
  47         default n
  48
  49 config ARCH_HAS_ILOG2_U32
  50         bool
  51         default n
  52
  53 config ARCH_HAS_ILOG2_U64
  54         bool
  55         default n
  56
  57 config GENERIC_FIND_NEXT_BIT
  58         bool
  59         default y
  60
  61 config GENERIC_GPIO
  62         bool
  63         default y
  64
  65 config GPIOLIB
  66         bool
  67         default y
  68
  69 config GENERIC_HWEIGHT
  70         bool
  71         default y
  72
  73 config GENERIC_HARDIRQS
  74         bool
  75         default y
  76
  77 config STACKTRACE_SUPPORT
  78         bool
  79         default y
  80
  81 config LOCKDEP_SUPPORT
  82         bool
  83         default y
  84
  85 config GENERIC_CALIBRATE_DELAY
  86         bool
  87         default y
  88
  89 config GENERIC_TIME
  90         bool
  91         default y
  92
  93 config TIME_LOW_RES
  94         bool
  95         default y
  96
  97 config GENERIC_CLOCKEVENTS
  98         bool
  99         default y
 100
 101 config GENERIC_CLOCKEVENTS_BROADCAST
 102         bool
 103         depends on GENERIC_CLOCKEVENTS
 104         default y if SMP && !LOCAL_TIMERS
 105
 106 config NO_IOPORT
 107         def_bool y
 108
 109 config ARCH_SUPPORTS_AOUT
 110         def_bool y
 111
 112 config IRQ_PER_CPU
 113         bool
 114         default y
 115
 116 config SCHED_NO_NO_OMIT_FRAME_POINTER
 117         bool
 118         default y
 119
 120 config UBICOM32_PLIO
 121         bool
 122         default n
 123
 124 menu "Processor type and features"
 125
 126 comment "Processor type will be selected by Board"
 127
 128 config UBICOM32_V3
 129         bool
 130         help
 131           Ubicom IP5xxx series processor support.
 132
 133 config UBICOM32_V4
 134         bool
 135         help
 136           Ubicom IP7xxx series processor support.
 137
 138 comment "Board"
 139 choice
 140         prompt "Board type"
 141         help
 142                 Select your board.
 143
 144 config NOBOARD
 145         bool "No board selected"
 146         help
 147                 Default. Don't select any board specific config. Will not build unless you change!
 148
 149 # Add your boards here
 150 source "arch/ubicom32/mach-ip5k/Kconfig"
 151 source "arch/ubicom32/mach-ip7k/Kconfig"
 152
 153 endchoice
 154
 155 comment "Kernel Options"
 156 config SMP
 157         bool "Symmetric multi-processing support"
 158         select USE_GENERIC_SMP_HELPERS
 159         default n
 160         help
 161           Enables multithreading support.  Enabling SMP support increases
 162           the size of system data structures.  SMP support can have either
 163           positive or negative impact on performance depending on workloads.
 164
 165           If you do not know what to do here, say N.
 166 config OLD_40400010_SYSTEM_CALL
 167         bool "Provide old system call interface at 0x40400010"
 168         default y
 169         help
 170           Provides the old system call interface, does not affect the
 171           new system_call interface.
 172
 173 config NR_CPUS
 174         int "Number of configured CPUs"
 175         range 2 32
 176         default 2
 177         depends on SMP
 178         help
 179                 Upper bound on the number of CPUs. Space is reserved
 180                 at compile time for this many CPUs.
 181
 182 config LOCAL_TIMERS
 183         bool "Use local timer interrupts"
 184         depends on SMP
 185         default y
 186         help
 187           Enable support for local timers on SMP platforms, rather then the
 188           legacy IPI broadcast method.  Local timers allows the system
 189           accounting to be spread across the timer interval, preventing a
 190           "thundering herd" at every timer tick.  A physical timer is allocated
 191           per cpu.
 192
 193 config TIMER_EXTRA_ALLOC
 194         int "Number of additional physical timer events to create"
 195         depends on GENERIC_CLOCKEVENTS
 196         default 0
 197         help
 198                 The Ubicom32 processor has a number of event timers that can be wrapped
 199                 in Linux clock event structures (assuming that the timers are not being
 200                 used for another purpose).  Based on the value of LOCAL_TIMERS, either
 201                 2 timers will be used or a timer will be used for every CPU.  This value
 202                 allows the programmer to select additional timers over that amount.
 203
 204 config IRQSTACKS
 205         bool "Create separate stacks for interrupt handling"
 206         default n
 207         help
 208                 Selecting this causes interrupts to be created on a separate
 209                 stack instead of nesting the interrupts on the kernel stack.
 210
 211 config IRQSTACKS_USEOCM
 212         bool "Use OCM for interrupt stacks"
 213         default n
 214         depends on IRQSTACKS
 215         help
 216                 Selecting this cause the interrupt stacks to be placed in OCM
 217                 reducing cache misses at the expense of using the OCM for servicing
 218                 interrupts.
 219
 220 menu "OCM Instruction Heap"
 221
 222 config OCM_MODULES_RESERVATION
 223         int "OCM Instruction heap reservation. 0-192 kB"
 224         range 0 192
 225         default "0"
 226         help
 227           The minimum amount of OCM memory to reserve for kernel loadable module
 228           code. If you are not using this memory it cannot be used for anything
 229           else. Leave it as 0 if you have prebuilt modules that are compiled with
 230           OCM support.
 231
 232 config OCM_MODULES_MAY_CONSUME_REMAINING_CODESPACE
 233         bool "Give all unused ocm code space to the ocm instruction heap."
 234         default n
 235         help
 236           Allow the OCM instruction heap allocation to consume any remaining
 237           unused OCM code space.  The result of this is that you will not have
 238           and deterministic results, but you will not have any waste either.
 239
 240 config OCM_MODULES_FALLBACK_TO_DDR
 241         bool "Loadable Modules requiring OCM may fallback to use DDR."
 242         default n
 243         help
 244           If a module cannot get the OCM code it requires allow DDR to
 245           be used instead.
 246 endmenu
 247
 248 config HZ
 249         int "Frequency of 'jiffies' (for polling)"
 250         default 1000
 251         help
 252                 100 is common for embedded systems, but 1000 allows
 253                 you to do more drivers without actually having
 254                 interrupts working properly.
 255
 256 comment "RAM configuration"
 257
 258 config MIN_RAMSIZE
 259         hex "Minimum Size of RAM (in bytes)"
 260         range 0x01000000 0x08000000
 261         default "0x02000000"
 262         help
 263                 Define the minimum acceptable size of the system
 264                 RAM. Must be at least 16MB (0x01000000)
 265
 266 comment "Build options"
 267 config LINKER_RELAXATION
 268         bool "Linker Relaxation"
 269         default y
 270         help
 271           Turns on linker relaxation that will produce smaller
 272           faster code. Increases link time.
 273
 274 comment "Driver options"
 275 menu "PCI Bus"
 276 config PCI
 277         bool "PCI bus"
 278         default true
 279         help
 280           Enable/Disable PCI bus
 281         source "drivers/pci/Kconfig"
 282
 283
 284 config PCI_DEV0_IDSEL
 285         hex "slot 0 address"
 286         depends on PCI
 287         default "0x01000000"
 288         help
 289           Slot 0 address.  This address should correspond to the address line
 290           which the IDSEL bit for this slot is connected to.
 291
 292 config PCI_DEV1_IDSEL
 293         hex "slot 1 address"
 294         depends on PCI
 295         default "0x02000000"
 296         help
 297           Slot 1 address.  This address should correspond to the address line
 298           which the IDSEL bit for this slot is connected to.
 299 endmenu
 300 # End PCI
 301
 302 menu "Input devices"
 303 config UBICOM_INPUT
 304         bool "Ubicom polled GPIO input driver"
 305         select INPUT
 306         select INPUT_POLLDEV
 307         help
 308                 Polling input driver, much like the GPIO input driver, except that it doesn't
 309                 rely on interrupts.  It will report events via the input subsystem.
 310         default n
 311
 312 config UBICOM_INPUT_I2C
 313         bool "Ubicom polled GPIO input driver over I2C"
 314         select INPUT
 315         select INPUT_POLLDEV
 316         help
 317                 Polling input driver, much like the PCA953x driver, it can support a variety of
 318                 different I2C I/O expanders.  This device polls the I2C I/O expander for events
 319                 and reports them via the input subsystem.
 320         default n
 321 endmenu
 322 # Input devices
 323
 324 source "arch/ubicom32/mach-common/Kconfig.switch"
 325
 326 menu "Misc devices"
 327 config UBICOM_HID
 328         bool "Ubicom HID driver"
 329         select INPUT
 330         select INPUT_POLLDEV
 331         select LCD_CLASS_DEVICE
 332         help
 333                 Driver for HID chip found on some Ubicom reference designs.  This chip handles
 334                 PWM, button input, and IR remote control.  It registers as an input device and
 335                 a backlight device.
 336         default n
 337 endmenu
 338 # Misc devices
 339
 340 config CMDLINE_BOOL
 341         bool "Built-in kernel command line"
 342         default n
 343         help
 344           Allow for specifying boot arguments to the kernel at
 345           build time.  On some systems (e.g. embedded ones), it is
 346           necessary or convenient to provide some or all of the
 347           kernel boot arguments with the kernel itself (that is,
 348           to not rely on the boot loader to provide them.)
 349
 350           To compile command line arguments into the kernel,
 351           set this option to 'Y', then fill in the
 352           the boot arguments in CONFIG_CMDLINE.
 353
 354           Systems with fully functional boot loaders (i.e. non-embedded)
 355           should leave this option set to 'N'.
 356
 357 config CMDLINE
 358         string "Built-in kernel command string"
 359         depends on CMDLINE_BOOL
 360         default ""
 361         help
 362           Enter arguments here that should be compiled into the kernel
 363           image and used at boot time.  If the boot loader provides a
 364           command line at boot time, it is appended to this string to
 365           form the full kernel command line, when the system boots.
 366
 367           However, you can use the CONFIG_CMDLINE_OVERRIDE option to
 368           change this behavior.
 369
 370           In most cases, the command line (whether built-in or provided
 371           by the boot loader) should specify the device for the root
 372           file system.
 373
 374 config CMDLINE_OVERRIDE
 375         bool "Built-in command line overrides boot loader arguments"
 376         default n
 377         depends on CMDLINE_BOOL
 378         help
 379           Set this option to 'Y' to have the kernel ignore the boot loader
 380           command line, and use ONLY the built-in command line.
 381
 382           This is used to work around broken boot loaders.  This should
 383           be set to 'N' under normal conditions.
 384
 385 endmenu
 386 # End Processor type and features
 387
 388 source "arch/ubicom32/Kconfig.debug"
 389
 390 menu "Executable file formats"
 391 source "fs/Kconfig.binfmt"
 392 endmenu
 393
 394 source "init/Kconfig"
 395 source "kernel/Kconfig.preempt"
 396 source "kernel/time/Kconfig"
 397 source "mm/Kconfig"
 398 source "net/Kconfig"
 399 source "drivers/Kconfig"
 400 source "fs/Kconfig"
 401 source "security/Kconfig"
 402 source "crypto/Kconfig"
 403 source "lib/Kconfig"