The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/i386/conf/NOTES

Version: -  FREEBSD  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-2  -  FREEBSD-11-1  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-4  -  FREEBSD-10-3  -  FREEBSD-10-2  -  FREEBSD-10-1  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-3  -  FREEBSD-9-2  -  FREEBSD-9-1  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-4  -  FREEBSD-8-3  -  FREEBSD-8-2  -  FREEBSD-8-1  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-4  -  FREEBSD-7-3  -  FREEBSD-7-2  -  FREEBSD-7-1  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-4  -  FREEBSD-6-3  -  FREEBSD-6-2  -  FREEBSD-6-1  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-5  -  FREEBSD-5-4  -  FREEBSD-5-3  -  FREEBSD-5-2  -  FREEBSD-5-1  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  linux-2.6  -  linux-2.4.22  -  MK83  -  MK84  -  PLAN9  -  DFBSD  -  NETBSD  -  NETBSD5  -  NETBSD4  -  NETBSD3  -  NETBSD20  -  OPENBSD  -  xnu-517  -  xnu-792  -  xnu-792.6.70  -  xnu-1228  -  xnu-1456.1.26  -  xnu-1699.24.8  -  xnu-2050.18.24  -  OPENSOLARIS  -  minix-3-1-1 
SearchContext: -  none  -  3  -  10 

    1 #
    2 # NOTES -- Lines that can be cut/pasted into kernel and hints configs.
    3 #
    4 # This file contains machine dependent kernel configuration notes.  For
    5 # machine independent notes, look in /sys/conf/NOTES.
    6 #
    7 # $FreeBSD$
    8 #
    9 
   10 #
   11 # We want LINT to cover profiling as well.
   12 profile         2
   13 
   14 
   15 #####################################################################
   16 # SMP OPTIONS:
   17 #
   18 # The apic device enables the use of the I/O APIC for interrupt delivery.
   19 # The apic device can be used in both UP and SMP kernels, but is required
   20 # for SMP kernels.  Thus, the apic device is not strictly an SMP option,
   21 # but it is a prerequisite for SMP.
   22 #
   23 # Notes:
   24 #
   25 # HTT CPUs should only be used if they are enabled in the BIOS.  For
   26 # the ACPI case, ACPI only correctly tells us about any HTT CPUs if
   27 # they are enabled.  However, most HTT systems do not list HTT CPUs
   28 # in the MP Table if they are enabled, thus we guess at the HTT CPUs
   29 # for the MP Table case.  However, we shouldn't try to guess and use
   30 # these CPUs if HTT is disabled.  Thus, HTT guessing is only enabled
   31 # for the MP Table if the user explicitly asks for it via the
   32 # MPTABLE_FORCE_HTT option.  Do NOT use this option if you have HTT
   33 # disabled in your BIOS.
   34 #
   35 # IPI_PREEMPTION instructs the kernel to preempt threads running on other
   36 # CPUS if needed.  Relies on the PREEMPTION option
   37 
   38 # Mandatory:
   39 device          apic                    # I/O apic
   40 
   41 # Optional:
   42 options         MPTABLE_FORCE_HTT       # Enable HTT CPUs with the MP Table
   43 options         IPI_PREEMPTION
   44 
   45 #
   46 # Watchdog routines.
   47 #
   48 options         MP_WATCHDOG
   49 
   50 # Debugging options.
   51 #
   52 options         STOP_NMI                # Stop CPUS using NMI instead of IPI
   53 options         COUNT_XINVLTLB_HITS     # Counters for TLB events
   54 options         COUNT_IPIS              # Per-CPU IPI interrupt counters
   55 
   56 
   57 
   58 #####################################################################
   59 # CPU OPTIONS
   60 
   61 #
   62 # You must specify at least one CPU (the one you intend to run on);
   63 # deleting the specification for CPUs you don't need to use may make
   64 # parts of the system run faster.
   65 #
   66 cpu             I486_CPU
   67 cpu             I586_CPU                # aka Pentium(tm)
   68 cpu             I686_CPU                # aka Pentium Pro(tm)
   69 
   70 #
   71 # Options for CPU features.
   72 #
   73 # CPU_ATHLON_SSE_HACK tries to enable SSE instructions when the BIOS has
   74 # forgotten to enable them.
   75 #
   76 # CPU_BLUELIGHTNING_3X enables triple-clock mode on IBM Blue Lightning
   77 # CPU if CPU supports it.  The default is double-clock mode on
   78 # BlueLightning CPU box.
   79 #
   80 # CPU_BLUELIGHTNING_FPU_OP_CACHE enables FPU operand cache on IBM
   81 # BlueLightning CPU.  It works only with Cyrix FPU, and this option
   82 # should not be used with Intel FPU.
   83 #
   84 # CPU_BTB_EN enables branch target buffer on Cyrix 5x86 (NOTE 1).
   85 #
   86 # CPU_CYRIX_NO_LOCK enables weak locking for the entire address space
   87 # of Cyrix 6x86 and 6x86MX CPUs by setting the NO_LOCK bit of CCR1.
   88 # Otherwise, the NO_LOCK bit of CCR1 is cleared.  (NOTE 3)
   89 #
   90 # CPU_DIRECT_MAPPED_CACHE sets L1 cache of Cyrix 486DLC CPU in direct
   91 # mapped mode.  Default is 2-way set associative mode.
   92 #
   93 # CPU_DISABLE_5X86_LSSER disables load store serialize (i.e., enables
   94 # reorder).  This option should not be used if you use memory mapped
   95 # I/O device(s).
   96 #
   97 # CPU_DISABLE_CMPXCHG disables the CMPXCHG instruction on > i386 IA32
   98 # machines.  VmWare 3.x seems to emulate this instruction poorly, causing
   99 # the guest OS to run very slowly.  This problem appears to be fixed in
  100 # VmWare 4.x, at least in version 4.5.2, so that enabling this option with
  101 # VmWare 4.x will result in locking operations to be 20-30 times slower.
  102 # Enabling this with an SMP kernel will cause the kernel to be unusable.
  103 #
  104 # CPU_DISABLE_SSE explicitly prevents I686_CPU from turning on SSE.
  105 #
  106 # CPU_ELAN enables support for AMDs ElanSC520 CPU.
  107 #    CPU_ELAN_PPS enables precision timestamp code.
  108 #    CPU_ELAN_XTAL sets the clock crystal frequency in Hz.
  109 #
  110 # CPU_ENABLE_LONGRUN enables support for Transmeta Crusoe LongRun
  111 # technology which allows to restrict power consumption of the CPU by
  112 # using group of hw.crusoe.* sysctls.
  113 #
  114 # CPU_FASTER_5X86_FPU enables faster FPU exception handler.
  115 #
  116 # CPU_GEODE is for the SC1100 Geode embedded processor.  This option
  117 # is necessary because the i8254 timecounter is toast.
  118 #
  119 # CPU_I486_ON_386 enables CPU cache on i486 based CPU upgrade products
  120 # for i386 machines.
  121 #
  122 # CPU_IORT defines I/O clock delay time (NOTE 1).  Default values of
  123 # I/O clock delay time on Cyrix 5x86 and 6x86 are 0 and 7,respectively
  124 # (no clock delay).
  125 #
  126 # CPU_L2_LATENCY specifies the L2 cache latency value.  This option is used
  127 # only when CPU_PPRO2CELERON is defined and Mendocino Celeron is detected.
  128 # The default value is 5.
  129 #
  130 # CPU_LOOP_EN prevents flushing the prefetch buffer if the destination
  131 # of a jump is already present in the prefetch buffer on Cyrix 5x86(NOTE
  132 # 1).
  133 #
  134 # CPU_PPRO2CELERON enables L2 cache of Mendocino Celeron CPUs.  This option
  135 # is useful when you use Socket 8 to Socket 370 converter, because most Pentium
  136 # Pro BIOSs do not enable L2 cache of Mendocino Celeron CPUs.
  137 #
  138 # CPU_RSTK_EN enables return stack on Cyrix 5x86 (NOTE 1).
  139 #
  140 # CPU_SOEKRIS enables support www.soekris.com hardware.
  141 #
  142 # CPU_SUSP_HLT enables suspend on HALT.  If this option is set, CPU
  143 # enters suspend mode following execution of HALT instruction.
  144 #
  145 # CPU_UPGRADE_HW_CACHE eliminates unneeded cache flush instruction(s).
  146 #
  147 # CPU_WT_ALLOC enables write allocation on Cyrix 6x86/6x86MX and AMD
  148 # K5/K6/K6-2 CPUs.
  149 #
  150 # CYRIX_CACHE_WORKS enables CPU cache on Cyrix 486 CPUs with cache
  151 # flush at hold state.
  152 #
  153 # CYRIX_CACHE_REALLY_WORKS enables (1) CPU cache on Cyrix 486 CPUs
  154 # without cache flush at hold state, and (2) write-back CPU cache on
  155 # Cyrix 6x86 whose revision < 2.7 (NOTE 2).
  156 #
  157 # NO_F00F_HACK disables the hack that prevents Pentiums (and ONLY
  158 # Pentiums) from locking up when a LOCK CMPXCHG8B instruction is
  159 # executed.  This option is only needed if I586_CPU is also defined,
  160 # and should be included for any non-Pentium CPU that defines it.
  161 #
  162 # NO_MEMORY_HOLE is an optimisation for systems with AMD K6 processors
  163 # which indicates that the 15-16MB range is *definitely* not being
  164 # occupied by an ISA memory hole.
  165 #
  166 # NOTE 1: The options, CPU_BTB_EN, CPU_LOOP_EN, CPU_IORT,
  167 # CPU_LOOP_EN and CPU_RSTK_EN should not be used because of CPU bugs.
  168 # These options may crash your system.
  169 #
  170 # NOTE 2: If CYRIX_CACHE_REALLY_WORKS is not set, CPU cache is enabled
  171 # in write-through mode when revision < 2.7.  If revision of Cyrix
  172 # 6x86 >= 2.7, CPU cache is always enabled in write-back mode.
  173 #
  174 # NOTE 3: This option may cause failures for software that requires
  175 # locked cycles in order to operate correctly.
  176 #
  177 options         CPU_ATHLON_SSE_HACK
  178 options         CPU_BLUELIGHTNING_3X
  179 options         CPU_BLUELIGHTNING_FPU_OP_CACHE
  180 options         CPU_BTB_EN
  181 options         CPU_DIRECT_MAPPED_CACHE
  182 options         CPU_DISABLE_5X86_LSSER
  183 options         CPU_DISABLE_CMPXCHG
  184 #options        CPU_DISABLE_SSE
  185 options         CPU_ELAN
  186 options         CPU_ELAN_PPS
  187 options         CPU_ELAN_XTAL=32768000
  188 options         CPU_ENABLE_LONGRUN
  189 options         CPU_FASTER_5X86_FPU
  190 options         CPU_GEODE
  191 options         CPU_I486_ON_386
  192 options         CPU_IORT
  193 options         CPU_L2_LATENCY=5
  194 options         CPU_LOOP_EN
  195 options         CPU_PPRO2CELERON
  196 options         CPU_RSTK_EN
  197 options         CPU_SOEKRIS
  198 options         CPU_SUSP_HLT
  199 options         CPU_UPGRADE_HW_CACHE
  200 options         CPU_WT_ALLOC
  201 options         CYRIX_CACHE_WORKS
  202 options         CYRIX_CACHE_REALLY_WORKS
  203 #options        NO_F00F_HACK
  204 
  205 # Debug options
  206 options         NPX_DEBUG       # enable npx debugging
  207 
  208 #
  209 # PERFMON causes the driver for Pentium/Pentium Pro performance counters
  210 # to be compiled.  See perfmon(4) for more information.
  211 #
  212 options         PERFMON
  213 
  214 #
  215 # XBOX causes the kernel to be bootable on the Microsoft XBox console system.
  216 # The resulting kernel will auto-detect whether it is being booted on a XBox,
  217 # so kernels compiled with this option will also work on an ordinary PC.
  218 # This option require I686_CPU.
  219 #
  220 # xboxfb includes support for the XBox frame buffer device. It is fully USB-
  221 # keyboard aware, and will only be used if an xbox is detected. This option
  222 # (obviously) requires XBOX support in your kernel.
  223 #
  224 # NOTE: xboxfb currently conflicts with syscons(4); if you have an XBOX and
  225 # include both in your kernel; you will not get any video output. Ordinary
  226 # PC's do not suffer from this.
  227 #
  228 options         XBOX
  229 device          xboxfb
  230 
  231 
  232 #####################################################################
  233 # NETWORKING OPTIONS
  234 
  235 #
  236 # DEVICE_POLLING adds support for mixed interrupt-polling handling
  237 # of network device drivers, which has significant benefits in terms
  238 # of robustness to overloads and responsivity, as well as permitting
  239 # accurate scheduling of the CPU time between kernel network processing
  240 # and other activities.  The drawback is a moderate (up to 1/HZ seconds)
  241 # potential increase in response times.
  242 # It is strongly recommended to use HZ=1000 or 2000 with DEVICE_POLLING
  243 # to achieve smoother behaviour.
  244 # Additionally, you can enable/disable polling at runtime with help of
  245 # the ifconfig(8) utility, and select the CPU fraction reserved to
  246 # userland with the sysctl variable kern.polling.user_frac
  247 # (default 50, range 0..100).
  248 #
  249 # Not all device drivers support this mode of operation at the time of
  250 # this writing.  See polling(4) for more details.
  251 
  252 options         DEVICE_POLLING
  253 
  254 
  255 #####################################################################
  256 # CLOCK OPTIONS
  257 
  258 # The following options are used for debugging clock behavior only, and
  259 # should not be used for production systems.
  260 
  261 # CLK_CALIBRATION_LOOP causes clock calibration to be run in a loop at
  262 # startup until the user presses a key.  (The i8254 clock is always
  263 # calibrated relative to the RTC (mc146818a) and this option causes the
  264 # calibration to be repeated.)
  265 options         CLK_CALIBRATION_LOOP
  266 
  267 # CLK_USE_I8254_CALIBRATION causes the calibrated frequency of the i8254
  268 # clock to actually be used.
  269 options         CLK_USE_I8254_CALIBRATION
  270 
  271 # Provide read/write access to the memory in the clock chip.
  272 device          nvram           # Access to rtc cmos via /dev/nvram
  273 
  274 
  275 #####################################################################
  276 # MISCELLANEOUS DEVICES AND OPTIONS
  277 
  278 # 
  279 # sio: serial ports (see sio(4)), including support for various
  280 #      PC Card devices, such as Modem and NICs
  281 #
  282 device          sio
  283 hint.sio.0.at="isa"
  284 hint.sio.0.port="0x3F8"
  285 hint.sio.0.flags="0x10"
  286 hint.sio.0.irq="4"
  287 
  288 # `flags' specific to sio(4).
  289 #       0x10    enable console support for this unit.  Other console flags
  290 #               (if applicable) are ignored unless this is set.  Enabling
  291 #               console support does not make the unit the preferred console.
  292 #               Boot with -h or set boot_serial=YES in the loader.  For sio(4)
  293 #               specifically, the 0x20 flag can also be set (see above).
  294 #               Currently, at most one unit can have console support; the
  295 #               first one (in config file order) with this flag set is
  296 #               preferred.  Setting this flag for sio0 gives the old behaviour.
  297 #       0x20    force this unit to be the console (unless there is another
  298 #               higher priority console).  This replaces the COMCONSOLE option.
  299 #       0x40    reserve this unit for low level console operations.  Do not
  300 #               access the device in any normal way.
  301 #       0x80    use this port for serial line gdb support in ddb.  Also known
  302 #               as debug port.
  303 # PnP `flags'
  304 #       0x1     disable probing of this device.  Used to prevent your modem
  305 #               from being attached as a PnP modem.
  306 # Other flags for sio that aren't documented in the man page.
  307 #       0x20000 enable hardware RTS/CTS and larger FIFOs.  Only works for
  308 #               ST16650A-compatible UARTs.
  309 
  310 # Options for sio:
  311 options         COM_ESP                 # Code for Hayes ESP.
  312 options         COM_MULTIPORT           # Code for some cards with shared IRQs.
  313 options         CONSPEED=115200         # Speed for serial console
  314                                         # (default 9600).
  315 
  316 device          speaker         #Play IBM BASIC-style noises out your speaker
  317 hint.speaker.0.at="isa"
  318 hint.speaker.0.port="0x61"
  319 device          gzip            #Exec gzipped a.out's.  REQUIRES COMPAT_AOUT!
  320 device          apm_saver       # Requires APM
  321 
  322 
  323 #####################################################################
  324 # HARDWARE BUS CONFIGURATION
  325 
  326 #
  327 # ISA bus
  328 #
  329 device          isa             # Required by npx(4)
  330 
  331 #
  332 # Options for `isa':
  333 #
  334 # AUTO_EOI_1 enables the `automatic EOI' feature for the master 8259A
  335 # interrupt controller.  This saves about 0.7-1.25 usec for each interrupt.
  336 # This option breaks suspend/resume on some portables.
  337 #
  338 # AUTO_EOI_2 enables the `automatic EOI' feature for the slave 8259A
  339 # interrupt controller.  This saves about 0.7-1.25 usec for each interrupt.
  340 # Automatic EOI is documented not to work for for the slave with the
  341 # original i8259A, but it works for some clones and some integrated
  342 # versions.
  343 #
  344 # MAXMEM specifies the amount of RAM on the machine; if this is not
  345 # specified, FreeBSD will first read the amount of memory from the CMOS
  346 # RAM, so the amount of memory will initially be limited to 64MB or 16MB
  347 # depending on the BIOS.  If the BIOS reports 64MB, a memory probe will
  348 # then attempt to detect the installed amount of RAM.  If this probe
  349 # fails to detect >64MB RAM you will have to use the MAXMEM option.
  350 # The amount is in kilobytes, so for a machine with 128MB of RAM, it would
  351 # be 131072 (128 * 1024).
  352 #
  353 # BROKEN_KEYBOARD_RESET disables the use of the keyboard controller to
  354 # reset the CPU for reboot.  This is needed on some systems with broken
  355 # keyboard controllers.
  356 
  357 options         AUTO_EOI_1
  358 #options        AUTO_EOI_2
  359 
  360 options         MAXMEM=(128*1024)
  361 #options        BROKEN_KEYBOARD_RESET
  362 
  363 #
  364 # EISA bus
  365 #
  366 # The EISA bus device is `eisa'.  It provides auto-detection and
  367 # configuration support for all devices on the EISA bus.
  368 
  369 device          eisa
  370 
  371 # By default, only 10 EISA slots are probed, since the slot numbers
  372 # above clash with the configuration address space of the PCI subsystem,
  373 # and the EISA probe is not very smart about this.  This is sufficient
  374 # for most machines, but in particular the HP NetServer LC series comes
  375 # with an onboard AIC7770 dual-channel SCSI controller on EISA slot #11,
  376 # thus you need to bump this figure to 12 for them.
  377 options         EISA_SLOTS=12
  378 
  379 #
  380 # MCA bus:
  381 #
  382 # The MCA bus device is `mca'.  It provides auto-detection and
  383 # configuration support for all devices on the MCA bus.
  384 # No hints are required for MCA.
  385 
  386 device          mca
  387 
  388 #
  389 # PCI bus & PCI options:
  390 #
  391 device          pci
  392 
  393 #
  394 # AGP GART support
  395 device          agp
  396 
  397 
  398 #####################################################################
  399 # HARDWARE DEVICE CONFIGURATION
  400 
  401 # To include support for VGA VESA video modes
  402 options         VESA
  403 
  404 # Turn on extra debugging checks and output for VESA support.
  405 options         VESA_DEBUG
  406 
  407 #
  408 # The Numeric Processing eXtension driver.  This is non-optional.
  409 device          npx
  410 hint.npx.0.flags="0x0"
  411 hint.npx.0.irq="13"
  412 
  413 #
  414 # `flags' for npx0:
  415 #       0x01    don't use the npx registers to optimize bcopy.
  416 #       0x02    don't use the npx registers to optimize bzero.
  417 #       0x04    don't use the npx registers to optimize copyin or copyout.
  418 # The npx registers are normally used to optimize copying and zeroing when
  419 # all of the following conditions are satisfied:
  420 #       I586_CPU is an option
  421 #       the cpu is an i586 (perhaps not a Pentium)
  422 #       the probe for npx0 succeeds
  423 #       INT 16 exception handling works.
  424 # Then copying and zeroing using the npx registers is normally 30-100% faster.
  425 # The flags can be used to control cases where it doesn't work or is slower.
  426 # Setting them at boot time using hints works right (the optimizations
  427 # are not used until later in the bootstrap when npx0 is attached).
  428 # Flag 0x08 automatically disables the i586 optimized routines.
  429 #
  430 
  431 #
  432 # Optional devices:
  433 #
  434 
  435 # PS/2 mouse
  436 device          psm
  437 hint.psm.0.at="atkbdc"
  438 hint.psm.0.irq="12"
  439 
  440 # Options for psm:
  441 options         PSM_HOOKRESUME          #hook the system resume event, useful
  442                                         #for some laptops
  443 options         PSM_RESETAFTERSUSPEND   #reset the device at the resume event
  444 
  445 # The keyboard controller; it controls the keyboard and the PS/2 mouse.
  446 device          atkbdc
  447 hint.atkbdc.0.at="isa"
  448 hint.atkbdc.0.port="0x060"
  449 
  450 # The AT keyboard
  451 device          atkbd
  452 hint.atkbd.0.at="atkbdc"
  453 hint.atkbd.0.irq="1"
  454 
  455 # Options for atkbd:
  456 options         ATKBD_DFLT_KEYMAP       # specify the built-in keymap
  457 makeoptions     ATKBD_DFLT_KEYMAP=jp.106
  458 
  459 # `flags' for atkbd:
  460 #       0x01    Force detection of keyboard, else we always assume a keyboard
  461 #       0x02    Don't reset keyboard, useful for some newer ThinkPads
  462 #       0x03    Force detection and avoid reset, might help with certain
  463 #               dockingstations
  464 #       0x04    Old-style (XT) keyboard support, useful for older ThinkPads
  465 
  466 # Video card driver for VGA adapters.
  467 device          vga
  468 hint.vga.0.at="isa"
  469 
  470 # Options for vga:
  471 # Try the following option if the mouse pointer is not drawn correctly
  472 # or font does not seem to be loaded properly.  May cause flicker on
  473 # some systems.
  474 options         VGA_ALT_SEQACCESS
  475 
  476 # If you can dispense with some vga driver features, you may want to
  477 # use the following options to save some memory.
  478 #options        VGA_NO_FONT_LOADING     # don't save/load font
  479 #options        VGA_NO_MODE_CHANGE      # don't change video modes
  480 
  481 # Older video cards may require this option for proper operation.
  482 options         VGA_SLOW_IOACCESS       # do byte-wide i/o's to TS and GDC regs
  483 
  484 # The following option probably won't work with the LCD displays.
  485 options         VGA_WIDTH90             # support 90 column modes
  486 
  487 # Debugging.
  488 options         VGA_DEBUG
  489 
  490 # 3Dfx Voodoo Graphics, Voodoo II /dev/3dfx CDEV support.  This will create
  491 # the /dev/3dfx0 device to work with glide implementations.  This should get
  492 # linked to /dev/3dfx and /dev/voodoo.  Note that this is not the same as
  493 # the tdfx DRI module from XFree86 and is completely unrelated.
  494 #
  495 # To enable Linuxulator support, one must also include COMPAT_LINUX in the
  496 # config as well.  The other option is to load both as modules.
  497 
  498 device          tdfx                    # Enable 3Dfx Voodoo support
  499 device          tdfx_linux              # Enable Linuxulator support
  500 
  501 #
  502 # ACPI support using the Intel ACPI Component Architecture reference
  503 # implementation.
  504 #
  505 # ACPI_DEBUG enables the use of the debug.acpi.level and debug.acpi.layer
  506 # kernel environment variables to select initial debugging levels for the
  507 # Intel ACPICA code.  (Note that the Intel code must also have USE_DEBUGGER
  508 # defined when it is built).
  509 #
  510 # ACPI_NO_SEMAPHORES makes the AcpiOs*Semaphore routines a no-op.
  511 #
  512 # Note that building ACPI into the kernel is deprecated; the module is
  513 # normally loaded automatically by the loader.
  514 
  515 device          acpi
  516 options         ACPI_DEBUG
  517 #!options       ACPI_NO_SEMAPHORES
  518 
  519 # ACPI Asus Desktop Extras. (voltage, temp, fan)
  520 device          acpi_aiboost
  521 
  522 # ACPI Asus Extras (LCD backlight/brightness, video output, etc.)
  523 device          acpi_asus
  524 
  525 # ACPI Fujitsu Extras (Buttons)
  526 device          acpi_fujitsu
  527 
  528 # ACPI extras driver for IBM laptops
  529 device         acpi_ibm
  530 
  531 # ACPI Panasonic Extras (LCD backlight/brightness, video output, etc.)
  532 device          acpi_panasonic
  533 
  534 # ACPI Sony extra (LCD brightness)
  535 device          acpi_sony
  536 
  537 # ACPI Toshiba Extras (LCD backlight/brightness, video output, etc.)
  538 device          acpi_toshiba
  539 
  540 # ACPI Video Extensions (LCD backlight/brightness, video output, etc.)
  541 device          acpi_video
  542 
  543 # ACPI Docking Station
  544 device          acpi_dock
  545 
  546 # The cpufreq(4) driver provides support for non-ACPI CPU frequency control
  547 device          cpufreq
  548 
  549 # Direct Rendering modules for 3D acceleration.
  550 device          drm             # DRM core module required by DRM drivers
  551 device          i915drm         # Intel i830 through i915
  552 device          mach64drm       # ATI Rage Pro, Rage Mobility P/M, Rage XL
  553 device          mgadrm          # AGP Matrox G200, G400, G450, G550
  554 device          r128drm         # ATI Rage 128
  555 device          radeondrm       # ATI Radeon
  556 device          savagedrm       # S3 Savage3D, Savage4
  557 device          sisdrm          # SiS 300/305, 540, 630
  558 device          tdfxdrm         # 3dfx Voodoo 3/4/5 and Banshee
  559 options         DRM_DEBUG       # Include debug printfs (slow)
  560 
  561 #
  562 # mse: Logitech and ATI InPort bus mouse ports
  563 
  564 device          mse
  565 hint.mse.0.at="isa"
  566 hint.mse.0.port="0x23c"
  567 hint.mse.0.irq="5"
  568 
  569 #
  570 # Network interfaces:
  571 #
  572 
  573 # ar:   Arnet SYNC/570i hdlc sync 2/4 port V.35/X.21 serial driver
  574 #       (requires sppp)
  575 # arl:  Aironet Arlan 655 wireless adapters.
  576 # ath:  Atheros a/b/g WiFi adapters (requires ath_hal and wlan)
  577 # ce:   Cronyx Tau-PCI/32 sync single/dual port G.703/E1 serial adaptor
  578 #       with 32 HDLC subchannels (requires sppp (default), or NETGRAPH if
  579 #       NETGRAPH_CRONYX is configured)
  580 # cp:   Cronyx Tau-PCI sync single/dual/four port
  581 #       V.35/RS-232/RS-530/RS-449/X.21/G.703/E1/E3/T3/STS-1
  582 #       serial adaptor (requires sppp (default), or NETGRAPH if
  583 #       NETGRAPH_CRONYX is configured)
  584 # cs:   IBM Etherjet and other Crystal Semi CS89x0-based adapters
  585 # ctau: Cronyx Tau sync dual port V.35/RS-232/RS-530/RS-449/X.21/G.703/E1
  586 #       serial adaptor (requires sppp (default), or NETGRAPH if
  587 #       NETGRAPH_CRONYX is configured)
  588 # cx:   Cronyx Sigma multiport sync/async adapter (requires sppp (default),
  589 #       or NETGRAPH if NETGRAPH_CRONYX is configured)
  590 # ed:   Western Digital and SMC 80xx; Novell NE1000 and NE2000; 3Com 3C503
  591 #       HP PC Lan+, various PC Card devices
  592 #       (requires miibus)
  593 # ie:   AT&T StarLAN 10 and EN100; 3Com 3C507; unknown NI5210;
  594 #       Intel EtherExpress
  595 # ipw:  Intel PRO/Wireless 2100 IEEE 802.11 adapter
  596 # iwi:  Intel PRO/Wireless 2200BG/2225BG/2915ABG IEEE 802.11 adapters
  597 # nfe:  nVidia nForce MCP on-board Ethernet Networking (BSD open source)
  598 # nve:  nVidia nForce MCP on-board Ethernet Networking
  599 # oltr: Olicom ISA token-ring adapters OC-3115, OC-3117, OC-3118 and OC-3133.
  600 #       Olicom PCI token-ring adapters OC-3136, OC-3137, OC-3139, OC-3140,
  601 #       OC-3141, OC-3540 and OC-3250.
  602 # ral:  Ralink Technology IEEE 802.11 wireless adapter
  603 # sbni: Granch SBNI12-xx ISA and PCI adapters
  604 # sr:   RISCom/N2 hdlc sync 1/2 port V.35/X.21 serial driver (requires sppp)
  605 # ural: Ralink Technology RT2500USB IEEE 802.11 wireless adapter
  606 # wl:   Lucent Wavelan (ISA card only).
  607 # wpi:  Intel 3945ABG Wireless LAN controller
  608 
  609 # Order for ISA/EISA devices is important here
  610 
  611 device          ar
  612 hint.ar.0.at="isa"
  613 hint.ar.0.port="0x300"
  614 hint.ar.0.irq="10"
  615 hint.ar.0.maddr="0xd0000"
  616 device          arl
  617 hint.arl.0.at="isa"
  618 hint.arl.0.irq="9"
  619 hint.arl.0.maddr="0xd0000"
  620 device          ce
  621 device          cp
  622 device          cs
  623 hint.cs.0.at="isa"
  624 hint.cs.0.port="0x300"
  625 device          ctau
  626 hint.ctau.0.at="isa"
  627 hint.ctau.0.port="0x240"
  628 hint.ctau.0.irq="15"
  629 hint.ctau.0.drq="7"
  630 device          cx
  631 hint.cx.0.at="isa"
  632 hint.cx.0.port="0x240"
  633 hint.cx.0.irq="15"
  634 hint.cx.0.drq="7"
  635 #options        NETGRAPH_CRONYX         # Enable NETGRAPH support for Cronyx adapter(s)
  636 device          ed
  637 options         ED_3C503
  638 options         ED_HPP
  639 options         ED_SIC
  640 hint.ed.0.at="isa"
  641 hint.ed.0.port="0x280"
  642 hint.ed.0.irq="5"
  643 hint.ed.0.maddr="0xd8000"
  644 device          ie                      # Hints only required for Starlan
  645 hint.ie.2.at="isa"
  646 hint.ie.2.port="0x300"
  647 hint.ie.2.irq="5"
  648 hint.ie.2.maddr="0xd0000"
  649 device          iwi
  650 device          ipw
  651 # Hint for the i386-only ISA front-end of le(4).
  652 hint.le.0.at="isa"
  653 hint.le.0.port="0x280"
  654 hint.le.0.irq="10"
  655 hint.le.0.drq="0"
  656 device          nfe             # nVidia nForce MCP on-board Ethernet Networking
  657 device          nve             # nVidia nForce MCP on-board Ethernet Networking
  658 device          oltr
  659 hint.oltr.0.at="isa"
  660 device          ral
  661 device          sbni
  662 hint.sbni.0.at="isa"
  663 hint.sbni.0.port="0x210"
  664 hint.sbni.0.irq="0xefdead"
  665 hint.sbni.0.flags="0"
  666 device          sr
  667 hint.sr.0.at="isa"
  668 hint.sr.0.port="0x300"
  669 hint.sr.0.irq="5"
  670 hint.sr.0.maddr="0xd0000"
  671 device          ural
  672 device          wl
  673 hint.wl.0.at="isa"
  674 hint.wl.0.port="0x300"
  675 options         WLCACHE         # enables the signal-strength cache
  676 options         WLDEBUG         # enables verbose debugging output
  677 device          wpi
  678 
  679 device          ath
  680 device          ath_hal         # Atheros HAL (includes binary component)
  681 #device         ath_rate_amrr   # AMRR rate control for ath driver
  682 #device         ath_rate_onoe   # Onoe rate control for ath driver
  683 device          ath_rate_sample # SampleRate rate control for the ath driver
  684 #device         wlan            # 802.11 layer
  685 
  686 #
  687 # ATA raid adapters
  688 #
  689 device          pst
  690 
  691 #
  692 # Areca 11xx and 12xx series of SATA II RAID controllers.
  693 # CAM is required.
  694 #
  695 device          arcmsr          # Areca SATA II RAID
  696 
  697 #
  698 # 3ware 9000 series PATA/SATA RAID controller driver and options.
  699 # The driver is implemented as a SIM, and so, needs the CAM infrastructure.
  700 #
  701 options         TWA_DEBUG               # 0-10; 10 prints the most messages.
  702 options         TWA_FLASH_FIRMWARE      # firmware image bundled when defined.
  703 device          twa                     # 3ware 9000 series PATA/SATA RAID
  704 
  705 #
  706 # SCSI host adapters:
  707 #
  708 # ncv: NCR 53C500 based SCSI host adapters.
  709 # nsp: Workbit Ninja SCSI-3 based PC Card SCSI host adapters.
  710 # stg: TMC 18C30, 18C50 based SCSI host adapters.
  711 
  712 device          ncv
  713 device          nsp
  714 device          stg
  715 hint.stg.0.at="isa"
  716 hint.stg.0.port="0x140"
  717 hint.stg.0.port="11"
  718 
  719 #
  720 # Adaptec FSA RAID controllers, including integrated DELL controllers,
  721 # the Dell PERC 2/QC and the HP NetRAID-4M
  722 device          aac
  723 device          aacp    # SCSI Passthrough interface (optional, CAM required)
  724 
  725 # The 'asr' driver provides support for current DPT/Adaptec SCSI RAID
  726 # controllers (SmartRAID V and VI and later).
  727 # These controllers require the CAM infrastructure.
  728 #
  729 device          asr
  730 
  731 #
  732 # Highpoint RocketRAID 182x.
  733 device          hptmv
  734 
  735 #
  736 # Highpoint RocketRAID.  Supports RR172x, RR222x, RR2240, RR232x, RR2340,
  737 # RR2210, RR174x, RR2522, RR231x, RR230x.
  738 device          hptrr
  739 
  740 #
  741 # Highpoint RocketRaid 3xxx series SATA RAID
  742 device          hptiop
  743 
  744 #
  745 # IBM (now Adaptec) ServeRAID controllers
  746 device          ips
  747 
  748 #
  749 # SafeNet crypto driver: can be moved to the MI NOTES as soon as
  750 # it's tested on a big-endian machine
  751 #
  752 device          safe            # SafeNet 1141
  753 options         SAFE_DEBUG      # enable debugging support: hw.safe.debug
  754 options         SAFE_RNDTEST    # enable rndtest support
  755 
  756 #####################################################################
  757 
  758 #
  759 # Miscellaneous hardware:
  760 #
  761 # apm: Laptop Advanced Power Management (experimental)
  762 # ipmi: Intelligent Platform Management Interface
  763 # pmtimer: Timer device driver for power management events (APM or ACPI)
  764 # smapi: System Management Application Program Interface driver
  765 # smbios: DMI/SMBIOS entry point
  766 # vpd: Vital Product Data kernel interface
  767 # cy: Cyclades serial driver
  768 # digi: Digiboard driver
  769 # spic: Sony Programmable I/O controller (VAIO notebooks)
  770 
  771 # Notes on APM
  772 #  The flags takes the following meaning for apm0:
  773 #    0x0020  Statclock is broken.
  774 
  775 # Notes on the Specialix SI/XIO driver:
  776 #  The host card is memory, not IO mapped.
  777 #  The Rev 1 host cards use a 64K chunk, on a 32K boundary.
  778 #  The Rev 2 host cards use a 32K chunk, on a 32K boundary.
  779 #  The cards can use an IRQ of 11, 12 or 15.
  780 
  781 # Notes on the Sony Programmable I/O controller
  782 #  This is a temporary driver that should someday be replaced by something
  783 #  that hooks into the ACPI layer.  The device is hooked to the PIIX4's
  784 #  General Device 10 decoder, which means you have to fiddle with PCI
  785 #  registers to map it in, even though it is otherwise treated here as
  786 #  an ISA device.  At the moment, the driver polls, although the device
  787 #  is capable of generating interrupts.  It largely undocumented.
  788 #  The port location in the hint is where you WANT the device to be
  789 #  mapped.  0x10a0 seems to be traditional.  At the moment the jogdial
  790 #  is the only thing truly supported, but apparently a fair percentage
  791 #  of the Vaio extra features are controlled by this device.
  792 
  793 device          apm
  794 hint.apm.0.flags="0x20"
  795 device          ipmi
  796 device          smapi
  797 device          smbios
  798 device          vpd
  799 device          pmtimer                 # Adjust system timer at wakeup time
  800 device          cy
  801 options         CY_PCI_FASTINTR         # Use with cy_pci unless irq is shared
  802 hint.cy.0.at="isa"
  803 hint.cy.0.irq="10"
  804 hint.cy.0.maddr="0xd4000"
  805 hint.cy.0.msize="0x2000"
  806 device          digi
  807 hint.digi.0.at="isa"
  808 hint.digi.0.port="0x104"
  809 hint.digi.0.maddr="0xd0000"
  810 # BIOS & FEP/OS components of device digi.
  811 device          digi_CX
  812 device          digi_CX_PCI
  813 device          digi_EPCX
  814 device          digi_EPCX_PCI
  815 device          digi_Xe
  816 device          digi_Xem
  817 device          digi_Xr
  818 # Parallel (8255 PPI) basic I/O (mode 0) port (e.g. Advantech PCL-724)
  819 device          pbio
  820 hint.pbio.0.at="isa"
  821 hint.pbio.0.port="0x360"
  822 device          spic
  823 hint.spic.0.at="isa"
  824 hint.spic.0.port="0x10a0"
  825 # HOT1 Xilinx 6200 card (http://www.vcc.com/)
  826 device          xrpu
  827 
  828 #
  829 # Laptop/Notebook options:
  830 #
  831 # See also:
  832 #  apm under `Miscellaneous hardware'
  833 # above.
  834 
  835 # For older notebooks that signal a powerfail condition (external
  836 # power supply dropped, or battery state low) by issuing an NMI:
  837 
  838 options         POWERFAIL_NMI   # make it beep instead of panicing
  839 
  840 #
  841 # I2C Bus
  842 #
  843 # Philips i2c bus support is provided by the `iicbus' device.
  844 #
  845 # Supported interfaces:
  846 # pcf   Philips PCF8584 ISA-bus controller
  847 #
  848 device          pcf
  849 hint.pcf.0.at="isa"
  850 hint.pcf.0.port="0x320"
  851 hint.pcf.0.irq="5"
  852 
  853 #
  854 # Hardware watchdog timers:
  855 #
  856 # ichwd: Intel ICH watchdog timer
  857 #
  858 device          ichwd
  859 
  860 #
  861 # Temperature sensors:
  862 #
  863 # coretemp: on-die sensor on Intel Core and newer CPUs
  864 #
  865 device          coretemp
  866 
  867 #---------------------------------------------------------------------------
  868 # ISDN4BSD
  869 #
  870 # See /usr/share/examples/isdn/ROADMAP for an introduction to isdn4bsd.
  871 #
  872 # i4b passive ISDN cards support contains the following hardware drivers:
  873 #
  874 #       isic  - Siemens/Infineon ISDN ISAC/HSCX/IPAC chipset driver
  875 #       iwic  - Winbond W6692 PCI bus ISDN S/T interface controller
  876 #       ifpi  - AVM Fritz!Card PCI driver
  877 #       ifpi2  - AVM Fritz!Card PCI version 2 driver
  878 #       ihfc  - Cologne Chip HFC ISA/ISA-PnP chipset driver
  879 #       ifpnp - AVM Fritz!Card PnP driver
  880 #       itjc  - Siemens ISAC / TJNet Tiger300/320 chipset
  881 #
  882 # i4b active ISDN cards support contains the following hardware drivers:
  883 #
  884 #       iavc  - AVM B1 PCI, AVM B1 ISA, AVM T1
  885 #
  886 # Note that the ``options'' (if given) and ``device'' lines must BOTH
  887 # be uncommented to enable support for a given card !
  888 #
  889 # In addition to a hardware driver (and probably an option) the mandatory
  890 # ISDN protocol stack devices and the mandatory support device must be
  891 # enabled as well as one or more devices from the optional devices section.
  892 #
  893 #---------------------------------------------------------------------------
  894 #       isic driver (Siemens/Infineon chipsets)
  895 #
  896 device  isic
  897 #
  898 # ISA bus non-PnP Cards:
  899 # ----------------------
  900 #
  901 # Teles S0/8 or Niccy 1008
  902 options         TEL_S0_8
  903 hint.isic.0.at="isa"
  904 hint.isic.0.maddr="0xd0000"
  905 hint.isic.0.irq="5"
  906 hint.isic.0.flags="1"
  907 #
  908 # Teles S0/16 or Creatix ISDN-S0 or Niccy 1016
  909 options         TEL_S0_16
  910 hint.isic.0.at="isa"
  911 hint.isic.0.port="0xd80"
  912 hint.isic.0.maddr="0xd0000"
  913 hint.isic.0.irq="5"
  914 hint.isic.0.flags="2"
  915 #
  916 # Teles S0/16.3
  917 options         TEL_S0_16_3
  918 hint.isic.0.at="isa"
  919 hint.isic.0.port="0xd80"
  920 hint.isic.0.irq="5"
  921 hint.isic.0.flags="3"
  922 #
  923 # AVM A1 or AVM Fritz!Card
  924 options         AVM_A1
  925 hint.isic.0.at="isa"
  926 hint.isic.0.port="0x340"
  927 hint.isic.0.irq="5"
  928 hint.isic.0.flags="4"
  929 #
  930 # USRobotics Sportster ISDN TA intern
  931 options         USR_STI
  932 hint.isic.0.at="isa"
  933 hint.isic.0.port="0x268"
  934 hint.isic.0.irq="5"
  935 hint.isic.0.flags="7"
  936 #
  937 # ITK ix1 Micro ( < V.3, non-PnP version )
  938 options         ITKIX1
  939 hint.isic.0.at="isa"
  940 hint.isic.0.port="0x398"
  941 hint.isic.0.irq="10"
  942 hint.isic.0.flags="18"
  943 #
  944 # ELSA PCC-16
  945 options         ELSA_PCC16
  946 hint.isic.0.at="isa"
  947 hint.isic.0.port="0x360"
  948 hint.isic.0.irq="10"
  949 hint.isic.0.flags="20"
  950 #
  951 # ISA bus PnP Cards:
  952 # ------------------
  953 #
  954 # Teles S0/16.3 PnP
  955 options         TEL_S0_16_3_P
  956 #
  957 # Creatix ISDN-S0 P&P
  958 options         CRTX_S0_P
  959 #
  960 # Dr. Neuhaus Niccy Go@
  961 options         DRN_NGO
  962 #
  963 # Sedlbauer Win Speed
  964 options         SEDLBAUER
  965 #
  966 # Dynalink IS64PH
  967 options         DYNALINK
  968 #
  969 # ELSA QuickStep 1000pro ISA
  970 options         ELSA_QS1ISA
  971 #
  972 # Siemens I-Surf 2.0
  973 options         SIEMENS_ISURF2
  974 #
  975 # Asuscom ISDNlink 128K ISA
  976 options         ASUSCOM_IPAC
  977 #
  978 # Eicon Diehl DIVA 2.0 and 2.02
  979 options         EICON_DIVA
  980 #
  981 # Compaq Microcom 610 ISDN card (Compaq series PSB2222I)
  982 options         COMPAQ_M610
  983 #
  984 # PCI bus Cards:
  985 # --------------
  986 #
  987 # ELSA MicroLink ISDN/PCI (same as ELSA QuickStep 1000pro PCI)
  988 options         ELSA_QS1PCI
  989 #
  990 #---------------------------------------------------------------------------
  991 #       ifpnp driver for AVM Fritz!Card PnP
  992 #
  993 # AVM Fritz!Card PnP
  994 device          ifpnp
  995 #
  996 #---------------------------------------------------------------------------
  997 #       ihfc driver for Cologne Chip ISA chipsets (experimental!)
  998 #
  999 # Teles 16.3c ISA PnP
 1000 # AcerISDN P10 ISA PnP
 1001 # TELEINT ISDN SPEED No.1
 1002 device          ihfc
 1003 #
 1004 #---------------------------------------------------------------------------
 1005 #       ifpi driver for AVM Fritz!Card PCI
 1006 #
 1007 # AVM Fritz!Card PCI
 1008 device          ifpi
 1009 #
 1010 #---------------------------------------------------------------------------
 1011 #       ifpi2 driver for AVM Fritz!Card PCI version 2
 1012 #
 1013 # AVM Fritz!Card PCI version 2
 1014 device          ifpi2
 1015 #
 1016 #---------------------------------------------------------------------------
 1017 #       iwic driver for Winbond W6692 chipset
 1018 #
 1019 # ASUSCOM P-IN100-ST-D (and other Winbond W6692 based cards)
 1020 device          iwic
 1021 #
 1022 #---------------------------------------------------------------------------
 1023 #       itjc driver for Siemens ISAC / TJNet Tiger300/320 chipset
 1024 #
 1025 # Traverse Technologies NETjet-S
 1026 # Teles PCI-TJ
 1027 device          itjc
 1028 #
 1029 #---------------------------------------------------------------------------
 1030 #       iavc driver (AVM active cards, needs i4bcapi driver!)
 1031 #
 1032 device          iavc
 1033 #
 1034 # AVM B1 ISA bus (PnP mode not supported!)
 1035 # ----------------------------------------
 1036 hint.iavc.0.at="isa"
 1037 hint.iavc.0.port="0x150"
 1038 hint.iavc.0.irq="5"
 1039 #
 1040 #---------------------------------------------------------------------------
 1041 #       ISDN Protocol Stack - mandatory for all hardware drivers
 1042 #
 1043 # Q.921 / layer 2 - i4b passive cards D channel handling
 1044 device          i4bq921
 1045 #
 1046 # Q.931 / layer 3 - i4b passive cards D channel handling
 1047 device          i4bq931
 1048 #
 1049 # layer 4 - i4b common passive and active card handling
 1050 device          i4b
 1051 #
 1052 #---------------------------------------------------------------------------
 1053 #       ISDN devices - mandatory for all hardware drivers
 1054 #
 1055 # userland driver to do ISDN tracing (for passive cards only)
 1056 device          i4btrc
 1057 options         NI4BTRC=4
 1058 #
 1059 # userland driver to control the whole thing
 1060 device          i4bctl
 1061 #
 1062 #---------------------------------------------------------------------------
 1063 #       ISDN devices - optional
 1064 #
 1065 # userland driver for access to raw B channel
 1066 device          i4brbch
 1067 options         NI4BRBCH=4
 1068 #
 1069 # userland driver for telephony
 1070 device          i4btel
 1071 options         NI4BTEL=2
 1072 #
 1073 #XXXBZ# IPR and ISPPP are not usable until I4B is locked.
 1074 # network driver for IP over raw HDLC ISDN
 1075 #XXXBZ#device           i4bipr
 1076 #XXXBZ#options  NI4BIPR=4
 1077 # enable VJ header compression detection for ipr i/f
 1078 #XXXBZ#options  IPR_VJ
 1079 # enable logging of the first n IP packets to isdnd (n=32 here)
 1080 #XXXBZ#options  IPR_LOG=32
 1081 #
 1082 # network driver for sync PPP over ISDN; requires an equivalent
 1083 # number of sppp device to be configured
 1084 #XXXBZ#device           i4bisppp
 1085 #XXXBZ#options  NI4BISPPP=4
 1086 #
 1087 # B-channel interface to the netgraph subsystem
 1088 #XXXBZ#device           i4bing
 1089 #XXXBZ#options  NI4BING=2
 1090 #
 1091 # CAPI driver needed for active ISDN cards (see iavc driver above)
 1092 device          i4bcapi
 1093 #
 1094 #---------------------------------------------------------------------------
 1095 
 1096 #
 1097 # System Management Bus (SMB)
 1098 #
 1099 options         ENABLE_ALART            # Control alarm on Intel intpm driver
 1100 
 1101 #
 1102 # Set the number of PV entries per process.  Increasing this can
 1103 # stop panics related to heavy use of shared memory.  However, that can
 1104 # (combined with large amounts of physical memory) cause panics at
 1105 # boot time due the kernel running out of VM space.
 1106 #
 1107 # If you're tweaking this, you might also want to increase the sysctls
 1108 # "vm.v_free_min", "vm.v_free_reserved", and "vm.v_free_target".
 1109 #
 1110 # The value below is the one more than the default.
 1111 #
 1112 options         PMAP_SHPGPERPROC=201
 1113 
 1114 #
 1115 # Change the size of the kernel virtual address space.  Due to
 1116 # constraints in loader(8) on i386, this must be a multiple of 4.
 1117 # 256 = 1 GB of kernel address space.  Increasing this also causes
 1118 # a reduction of the address space in user processes.  512 splits
 1119 # the 4GB cpu address space in half (2GB user, 2GB kernel).  For PAE
 1120 # kernels, the value will need to be double non-PAE.  A value of 1024
 1121 # for PAE kernels is necessary to split the address space in half.
 1122 # This will likely need to be increased to handle memory sizes >4GB.
 1123 # PAE kernels default to a value of 512.
 1124 #
 1125 options         KVA_PAGES=260
 1126 
 1127 
 1128 #####################################################################
 1129 # ABI Emulation
 1130 
 1131 # Enable iBCS2 runtime support for SCO and ISC binaries
 1132 options         IBCS2
 1133 
 1134 # Emulate spx device for client side of SVR3 local X interface
 1135 options         SPX_HACK
 1136 
 1137 # Enable Linux ABI emulation
 1138 options         COMPAT_LINUX
 1139 
 1140 # Enable i386 a.out binary support
 1141 options         COMPAT_AOUT
 1142 
 1143 # Enable the linux-like proc filesystem support (requires COMPAT_LINUX
 1144 # and PSEUDOFS)
 1145 options         LINPROCFS
 1146 
 1147 #Enable the linux-like sys filesystem support (requires COMPAT_LINUX
 1148 # and PSEUDOFS)
 1149 options         LINSYSFS
 1150 
 1151 #
 1152 # SysVR4 ABI emulation
 1153 #
 1154 # The svr4 ABI emulator can be statically compiled into the kernel or loaded as
 1155 # a KLD module.
 1156 # The STREAMS network emulation code can also be compiled statically or as a
 1157 # module.  If loaded as a module, it must be loaded before the svr4 module
 1158 # (the /usr/sbin/svr4 script does this for you).  If compiling statically,
 1159 # the `streams' device must be configured into any kernel which also
 1160 # specifies COMPAT_SVR4.  It is possible to have a statically-configured
 1161 # STREAMS device and a dynamically loadable svr4 emulator;  the /usr/sbin/svr4
 1162 # script understands that it doesn't need to load the `streams' module under
 1163 # those circumstances.
 1164 # Caveat:  At this time, `options KTRACE' is required for the svr4 emulator
 1165 # (whether static or dynamic).
 1166 #
 1167 options         COMPAT_SVR4     # build emulator statically
 1168 options         DEBUG_SVR4      # enable verbose debugging
 1169 device          streams         # STREAMS network driver (required for svr4).
 1170 
 1171 # Enable NDIS binary driver support
 1172 options         NDISAPI
 1173 device          ndis
 1174 
 1175 
 1176 #####################################################################
 1177 # VM OPTIONS
 1178 
 1179 # Disable the 4 MByte page PSE CPU feature.  The PSE feature allows the
 1180 # kernel to use 4 MByte pages to map the kernel instead of 4k pages.
 1181 # This saves on the amount of memory needed for page tables needed to
 1182 # map the kernel.  You should only disable this feature as a temporary
 1183 # workaround if you are having problems with it enabled.
 1184 #
 1185 #options        DISABLE_PSE
 1186 
 1187 # Disable the global pages PGE CPU feature.  The PGE feature allows pages
 1188 # to be marked with the PG_G bit.  TLB entries for these pages are not
 1189 # flushed from the cache when %cr3 is reloaded.  This can make context
 1190 # switches less expensive.  You should only disable this feature as a
 1191 # temporary workaround if you are having problems with it enabled.
 1192 #
 1193 #options        DISABLE_PG_G
 1194 
 1195 # KSTACK_PAGES is the number of memory pages to assign to the kernel
 1196 # stack of each thread.
 1197 
 1198 options         KSTACK_PAGES=3
 1199 
 1200 #####################################################################
 1201 
 1202 # More undocumented options for linting.
 1203 # Note that documenting these are not considered an affront.
 1204 
 1205 options         FB_INSTALL_CDEV         # install a CDEV entry in /dev
 1206 
 1207 # PECOFF module (Win32 Execution Format)
 1208 options         PECOFF_SUPPORT
 1209 options         PECOFF_DEBUG
 1210 
 1211 options         I4B_SMP_WORKAROUND
 1212 options         I586_PMC_GUPROF=0x70000
 1213 options         KBDIO_DEBUG=2
 1214 options         KBD_MAXRETRY=4
 1215 options         KBD_MAXWAIT=6
 1216 options         KBD_RESETDELAY=201
 1217 
 1218 options         PSM_DEBUG=1
 1219 
 1220 options         TIMER_FREQ=((14318182+6)/12)
 1221 
 1222 options         VM_KMEM_SIZE
 1223 options         VM_KMEM_SIZE_MAX
 1224 options         VM_KMEM_SIZE_SCALE
 1225 
 1226 
 1227 # asr old ioctls support, needed by raidutils
 1228 
 1229 options         ASR_COMPAT

Cache object: 090565e759b5617a78e027f0efc44cac


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.