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


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

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    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: releng/5.3/sys/i386/conf/NOTES 136919 2004-10-24 18:02:52Z scottl $
    8 #
    9 
   10 #
   11 # This directive is mandatory; it defines the architecture to be
   12 # configured for; in this case, the 386 family based IBM-PC and
   13 # compatibles.
   14 #
   15 machine         i386
   16 
   17 #
   18 # We want LINT to cover profiling as well.
   19 profile         2
   20 
   21 
   22 #####################################################################
   23 # SMP OPTIONS:
   24 #
   25 # The apic device enables the use of the I/O APIC for interrupt delivery.
   26 # The apic device can be used in both UP and SMP kernels, but is required
   27 # for SMP kernels.  Thus, the apic device is not strictly an SMP option,
   28 # but it is a prerequisite for SMP.
   29 #
   30 # Notes:
   31 #
   32 # Be sure to disable 'cpu I386_CPU' for SMP kernels.
   33 #
   34 # By default, mixed mode is used to route IRQ0 from the AT timer via
   35 # the 8259A master PIC through the ExtINT pin on the first I/O APIC.
   36 # This can be disabled via the NO_MIXED_MODE option.  In that case,
   37 # IRQ0 will be routed via an intpin on the first I/O APIC.  Not all
   38 # motherboards hook IRQ0 up to the first I/O APIC even though their
   39 # MP table or MADT may claim to do so.  That is why mixed mode is
   40 # enabled by default.
   41 #
   42 # HTT CPUs should only be used if they are enabled in the BIOS.  For
   43 # the ACPI case, ACPI only correctly tells us about any HTT CPUs if
   44 # they are enabled.  However, most HTT systems do not list HTT CPUs
   45 # in the MP Table if they are enabled, thus we guess at the HTT CPUs
   46 # for the MP Table case.  However, we shouldn't try to guess and use
   47 # these CPUs if HTT is disabled.  Thus, HTT guessing is only enabled
   48 # for the MP Table if the user explicitly asks for it via the
   49 # MPTABLE_FORCE_HTT option.  Do NOT use this option if you have HTT
   50 # disabled in your BIOS.
   51 #
   52 
   53 # Mandatory:
   54 device          apic                    # I/O apic
   55 
   56 # Optional:
   57 options         MPTABLE_FORCE_HTT       # Enable HTT CPUs with the MP Table
   58 options         NO_MIXED_MODE           # Disable use of mixed mode
   59 
   60 
   61 #####################################################################
   62 # CPU OPTIONS
   63 
   64 #
   65 # You must specify at least one CPU (the one you intend to run on);
   66 # deleting the specification for CPUs you don't need to use may make
   67 # parts of the system run faster.
   68 # I386_CPU is mutually exclusive with the other CPU types.
   69 # I386_CPU is deprecated and will be removed in 6.0-RELEASE.
   70 #
   71 #cpu            I386_CPU
   72 cpu             I486_CPU
   73 cpu             I586_CPU                # aka Pentium(tm)
   74 cpu             I686_CPU                # aka Pentium Pro(tm)
   75 
   76 #
   77 # Options for CPU features.
   78 #
   79 # CPU_ATHLON_SSE_HACK tries to enable SSE instructions when the BIOS has
   80 # forgotten to enable them.
   81 #
   82 # CPU_BLUELIGHTNING_3X enables triple-clock mode on IBM Blue Lightning
   83 # CPU if CPU supports it.  The default is double-clock mode on
   84 # BlueLightning CPU box.
   85 #
   86 # CPU_BLUELIGHTNING_FPU_OP_CACHE enables FPU operand cache on IBM
   87 # BlueLightning CPU.  It works only with Cyrix FPU, and this option
   88 # should not be used with Intel FPU.
   89 #
   90 # CPU_BTB_EN enables branch target buffer on Cyrix 5x86 (NOTE 1).
   91 #
   92 # CPU_CYRIX_NO_LOCK enables weak locking for the entire address space
   93 # of Cyrix 6x86 and 6x86MX CPUs by setting the NO_LOCK bit of CCR1.
   94 # Otherwise, the NO_LOCK bit of CCR1 is cleared.  (NOTE 3)
   95 #
   96 # CPU_DIRECT_MAPPED_CACHE sets L1 cache of Cyrix 486DLC CPU in direct
   97 # mapped mode.  Default is 2-way set associative mode.
   98 #
   99 # CPU_DISABLE_5X86_LSSER disables load store serialize (i.e., enables
  100 # reorder).  This option should not be used if you use memory mapped
  101 # I/O device(s).
  102 #
  103 # CPU_DISABLE_CMPXCHG disables the CMPXCHG instruction on > i386 IA32
  104 # machines.  VmWare 3.x seems to emulate this instruction poorly, causing
  105 # the guest OS to run very slowly.  This problem appears to be fixed in
  106 # VmWare 4.x, at least in version 4.5.2, so that enabling this option with
  107 # VmWare 4.x will result in locking operations to be 20-30 times slower.
  108 # Enabling this with an SMP kernel will cause the kernel to be unusable.
  109 #
  110 # CPU_DISABLE_SSE explicitly prevents I686_CPU from turning on SSE.
  111 #
  112 # CPU_ELAN enables support for AMDs ElanSC520 CPU.
  113 #    CPU_ELAN_PPS enables precision timestamp code.
  114 #    CPU_ELAN_XTAL sets the clock crystal frequency in Hz.
  115 #
  116 # CPU_ENABLE_LONGRUN enables support for Transmeta Crusoe LongRun
  117 # technology which allows to restrict power consumption of the CPU by
  118 # using group of hw.crusoe.* sysctls.
  119 #
  120 # CPU_ENABLE_SSE enables SSE/MMX2 instructions support.  This is default
  121 # on I686_CPU and above.
  122 #
  123 # CPU_ENABLE_TCC enables Thermal Control Circuitry (TCC) found in some
  124 # Pentium(tm) 4 and (possibly) later CPUs.  When enabled and detected,
  125 # TCC supports restricting power consumption using the hw.p4tcc.*
  126 # sysctls.  This operates independently of SpeedStep and is useful on
  127 # systems where other mechanisms such as apm(4) or acpi(4) don't work.
  128 #
  129 # CPU_FASTER_5X86_FPU enables faster FPU exception handler.
  130 #
  131 # CPU_GEODE is for the SC1100 Geode embedded processor.  This option
  132 # is necessary because the i8254 timecounter is toast.
  133 #
  134 # CPU_I486_ON_386 enables CPU cache on i486 based CPU upgrade products
  135 # for i386 machines.
  136 #
  137 # CPU_IORT defines I/O clock delay time (NOTE 1).  Default values of
  138 # I/O clock delay time on Cyrix 5x86 and 6x86 are 0 and 7,respectively
  139 # (no clock delay).
  140 #
  141 # CPU_L2_LATENCY specifies the L2 cache latency value.  This option is used
  142 # only when CPU_PPRO2CELERON is defined and Mendocino Celeron is detected.
  143 # The default value is 5.
  144 #
  145 # CPU_LOOP_EN prevents flushing the prefetch buffer if the destination
  146 # of a jump is already present in the prefetch buffer on Cyrix 5x86(NOTE
  147 # 1).
  148 #
  149 # CPU_PPRO2CELERON enables L2 cache of Mendocino Celeron CPUs.  This option
  150 # is useful when you use Socket 8 to Socket 370 converter, because most Pentium
  151 # Pro BIOSs do not enable L2 cache of Mendocino Celeron CPUs.
  152 #
  153 # CPU_RSTK_EN enables return stack on Cyrix 5x86 (NOTE 1).
  154 #
  155 # CPU_SOEKRIS enables support www.soekris.com hardware.
  156 #
  157 # CPU_SUSP_HLT enables suspend on HALT.  If this option is set, CPU
  158 # enters suspend mode following execution of HALT instruction.
  159 #
  160 # CPU_UPGRADE_HW_CACHE eliminates unneeded cache flush instruction(s).
  161 #
  162 # CPU_WT_ALLOC enables write allocation on Cyrix 6x86/6x86MX and AMD
  163 # K5/K6/K6-2 CPUs.
  164 #
  165 # CYRIX_CACHE_WORKS enables CPU cache on Cyrix 486 CPUs with cache
  166 # flush at hold state.
  167 #
  168 # CYRIX_CACHE_REALLY_WORKS enables (1) CPU cache on Cyrix 486 CPUs
  169 # without cache flush at hold state, and (2) write-back CPU cache on
  170 # Cyrix 6x86 whose revision < 2.7 (NOTE 2).
  171 #
  172 # NO_F00F_HACK disables the hack that prevents Pentiums (and ONLY
  173 # Pentiums) from locking up when a LOCK CMPXCHG8B instruction is
  174 # executed.  This option is only needed if I586_CPU is also defined,
  175 # and should be included for any non-Pentium CPU that defines it.
  176 #
  177 # NO_MEMORY_HOLE is an optimisation for systems with AMD K6 processors
  178 # which indicates that the 15-16MB range is *definitely* not being
  179 # occupied by an ISA memory hole.
  180 #
  181 # NOTE 1: The options, CPU_BTB_EN, CPU_LOOP_EN, CPU_IORT,
  182 # CPU_LOOP_EN and CPU_RSTK_EN should not be used because of CPU bugs.
  183 # These options may crash your system.
  184 #
  185 # NOTE 2: If CYRIX_CACHE_REALLY_WORKS is not set, CPU cache is enabled
  186 # in write-through mode when revision < 2.7.  If revision of Cyrix
  187 # 6x86 >= 2.7, CPU cache is always enabled in write-back mode.
  188 #
  189 # NOTE 3: This option may cause failures for software that requires
  190 # locked cycles in order to operate correctly.
  191 #
  192 options         CPU_ATHLON_SSE_HACK
  193 options         CPU_BLUELIGHTNING_3X
  194 options         CPU_BLUELIGHTNING_FPU_OP_CACHE
  195 options         CPU_BTB_EN
  196 options         CPU_DIRECT_MAPPED_CACHE
  197 options         CPU_DISABLE_5X86_LSSER
  198 options         CPU_DISABLE_CMPXCHG
  199 #options        CPU_DISABLE_SSE
  200 options         CPU_ELAN
  201 options         CPU_ELAN_PPS
  202 options         CPU_ELAN_XTAL=32768000
  203 options         CPU_ENABLE_LONGRUN
  204 options         CPU_ENABLE_SSE
  205 options         CPU_ENABLE_TCC
  206 options         CPU_FASTER_5X86_FPU
  207 options         CPU_GEODE
  208 options         CPU_I486_ON_386
  209 options         CPU_IORT
  210 options         CPU_L2_LATENCY=5
  211 options         CPU_LOOP_EN
  212 options         CPU_PPRO2CELERON
  213 options         CPU_RSTK_EN
  214 options         CPU_SOEKRIS
  215 options         CPU_SUSP_HLT
  216 options         CPU_UPGRADE_HW_CACHE
  217 options         CPU_WT_ALLOC
  218 options         CYRIX_CACHE_WORKS
  219 options         CYRIX_CACHE_REALLY_WORKS
  220 #options        NO_F00F_HACK
  221 
  222 # Debug options
  223 options         NPX_DEBUG       # enable npx debugging
  224 
  225 #
  226 # PERFMON causes the driver for Pentium/Pentium Pro performance counters
  227 # to be compiled.  See perfmon(4) for more information.
  228 #
  229 options         PERFMON
  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 the
  245 # sysctl variable kern.polling.enable (defaults off), and select
  246 # the CPU fraction reserved to userland with the sysctl variable
  247 # kern.polling.user_frac (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 
  272 #####################################################################
  273 # MISCELLANEOUS DEVICES AND OPTIONS
  274 
  275 device          speaker         #Play IBM BASIC-style noises out your speaker
  276 hint.speaker.0.at="isa"
  277 hint.speaker.0.port="0x61"
  278 device          gzip            #Exec gzipped a.out's.  REQUIRES COMPAT_AOUT!
  279 device          apm_saver       # Requires APM
  280 
  281 
  282 #####################################################################
  283 # HARDWARE BUS CONFIGURATION
  284 
  285 #
  286 # ISA bus
  287 #
  288 device          isa             # Required by npx(4)
  289 
  290 #
  291 # Options for `isa':
  292 #
  293 # AUTO_EOI_1 enables the `automatic EOI' feature for the master 8259A
  294 # interrupt controller.  This saves about 0.7-1.25 usec for each interrupt.
  295 # This option breaks suspend/resume on some portables.
  296 #
  297 # AUTO_EOI_2 enables the `automatic EOI' feature for the slave 8259A
  298 # interrupt controller.  This saves about 0.7-1.25 usec for each interrupt.
  299 # Automatic EOI is documented not to work for for the slave with the
  300 # original i8259A, but it works for some clones and some integrated
  301 # versions.
  302 #
  303 # MAXMEM specifies the amount of RAM on the machine; if this is not
  304 # specified, FreeBSD will first read the amount of memory from the CMOS
  305 # RAM, so the amount of memory will initially be limited to 64MB or 16MB
  306 # depending on the BIOS.  If the BIOS reports 64MB, a memory probe will
  307 # then attempt to detect the installed amount of RAM.  If this probe
  308 # fails to detect >64MB RAM you will have to use the MAXMEM option.
  309 # The amount is in kilobytes, so for a machine with 128MB of RAM, it would
  310 # be 131072 (128 * 1024).
  311 #
  312 # BROKEN_KEYBOARD_RESET disables the use of the keyboard controller to
  313 # reset the CPU for reboot.  This is needed on some systems with broken
  314 # keyboard controllers.
  315 
  316 options         AUTO_EOI_1
  317 #options        AUTO_EOI_2
  318 
  319 options         MAXMEM=(128*1024)
  320 #options        BROKEN_KEYBOARD_RESET
  321 
  322 #
  323 # EISA bus
  324 #
  325 # The EISA bus device is `eisa'.  It provides auto-detection and
  326 # configuration support for all devices on the EISA bus.
  327 
  328 device          eisa
  329 
  330 # By default, only 10 EISA slots are probed, since the slot numbers
  331 # above clash with the configuration address space of the PCI subsystem,
  332 # and the EISA probe is not very smart about this.  This is sufficient
  333 # for most machines, but in particular the HP NetServer LC series comes
  334 # with an onboard AIC7770 dual-channel SCSI controller on EISA slot #11,
  335 # thus you need to bump this figure to 12 for them.
  336 options         EISA_SLOTS=12
  337 
  338 #
  339 # MCA bus:
  340 #
  341 # The MCA bus device is `mca'.  It provides auto-detection and
  342 # configuration support for all devices on the MCA bus.
  343 # No hints are required for MCA.
  344 
  345 device          mca
  346 
  347 #
  348 # PCI bus & PCI options:
  349 #
  350 device          pci
  351 
  352 #
  353 # AGP GART support
  354 device          agp
  355 options         AGP_AMD64_GART  # Included GART code for AMD64 machines.
  356 
  357 
  358 #####################################################################
  359 # HARDWARE DEVICE CONFIGURATION
  360 
  361 # To include support for VGA VESA video modes
  362 options         VESA
  363 
  364 # Turn on extra debugging checks and output for VESA support.
  365 options         VESA_DEBUG
  366 
  367 # The pcvt console driver (vt220 compatible).
  368 device          vt
  369 hint.vt.0.at="isa"
  370 options         XSERVER                 # support for running an X server on vt
  371 options         FAT_CURSOR              # start with block cursor
  372 # This PCVT option is for keyboards such as those used on really old ThinkPads
  373 options         PCVT_SCANSET=2
  374 # Other PCVT options are documented in pcvt(4).
  375 options         PCVT_24LINESDEF
  376 options         PCVT_CTRL_ALT_DEL
  377 options         PCVT_META_ESC
  378 options         PCVT_NSCREENS=9
  379 options         PCVT_PRETTYSCRNS
  380 options         PCVT_SCREENSAVER
  381 options         PCVT_USEKBDSEC
  382 options         PCVT_VT220KEYB
  383 options         PCVT_GREENSAVER
  384 
  385 #
  386 # The Numeric Processing eXtension driver.  This is non-optional.
  387 device          npx
  388 hint.npx.0.flags="0x0"
  389 hint.npx.0.irq="13"
  390 
  391 #
  392 # `flags' for npx0:
  393 #       0x01    don't use the npx registers to optimize bcopy.
  394 #       0x02    don't use the npx registers to optimize bzero.
  395 #       0x04    don't use the npx registers to optimize copyin or copyout.
  396 # The npx registers are normally used to optimize copying and zeroing when
  397 # all of the following conditions are satisfied:
  398 #       I586_CPU is an option
  399 #       the cpu is an i586 (perhaps not a Pentium)
  400 #       the probe for npx0 succeeds
  401 #       INT 16 exception handling works.
  402 # Then copying and zeroing using the npx registers is normally 30-100% faster.
  403 # The flags can be used to control cases where it doesn't work or is slower.
  404 # Setting them at boot time using userconfig works right (the optimizations
  405 # are not used until later in the bootstrap when npx0 is attached).
  406 # Flag 0x08 automatically disables the i586 optimized routines.
  407 #
  408 
  409 #
  410 # Optional devices:
  411 #
  412 
  413 # 3Dfx Voodoo Graphics, Voodoo II /dev/3dfx CDEV support.  This will create
  414 # the /dev/3dfx0 device to work with glide implementations.  This should get
  415 # linked to /dev/3dfx and /dev/voodoo.  Note that this is not the same as
  416 # the tdfx DRI module from XFree86 and is completely unrelated.
  417 #
  418 # To enable Linuxulator support, one must also include COMPAT_LINUX in the
  419 # config as well, or you will not have the dependencies.  The other option
  420 # is to load both as modules.
  421 
  422 device          tdfx                    # Enable 3Dfx Voodoo support
  423 options         TDFX_LINUX              # Enable Linuxulator support
  424 
  425 #
  426 # ACPI support using the Intel ACPI Component Architecture reference
  427 # implementation.
  428 #
  429 # ACPI_DEBUG enables the use of the debug.acpi.level and debug.acpi.layer
  430 # kernel environment variables to select initial debugging levels for the
  431 # Intel ACPICA code.  (Note that the Intel code must also have USE_DEBUGGER
  432 # defined when it is built).
  433 #
  434 # ACPI_MAX_THREADS sets the number of task threads started.
  435 #
  436 # ACPI_NO_SEMAPHORES makes the AcpiOs*Semaphore routines a no-op.
  437 #
  438 # ACPICA_PEDANTIC enables strict checking of AML.  Our default is to
  439 # relax these checks to allow code generated by the Microsoft compiler
  440 # to still execute.
  441 #
  442 # Note that building ACPI into the kernel is deprecated; the module is
  443 # normally loaded automatically by the loader.
  444 
  445 device          acpi
  446 options         ACPI_DEBUG
  447 options         ACPI_MAX_THREADS=1
  448 #!options       ACPI_NO_SEMAPHORES
  449 #!options       ACPICA_PEDANTIC
  450 
  451 # ACPI Asus Extras (LCD backlight/brightness, video output, etc.)
  452 device          acpi_asus
  453 
  454 # ACPI Panasonic Extras (LCD backlight/brightness, video output, etc.)
  455 device          acpi_panasonic
  456 
  457 # ACPI Toshiba Extras (LCD backlight/brightness, video output, etc.)
  458 device          acpi_toshiba
  459 
  460 # ACPI Video Extensions (LCD backlight/brightness, video output, etc.)
  461 device          acpi_video
  462 
  463 # DRM options:
  464 # mgadrm:    AGP Matrox G200, G400, G450, G550
  465 # r128drm:   ATI Rage 128
  466 # radeondrm: ATI Radeon up to 9000/9100
  467 # sisdrm:    SiS 300/305,540,630
  468 # tdfxdrm:   3dfx Voodoo 3/4/5 and Banshee
  469 # DRM_DEBUG: include debug printfs, very slow
  470 #
  471 # mga requires AGP in the kernel, and it is recommended
  472 # for AGP r128 and radeon cards.
  473 
  474 device          mgadrm
  475 device          "r128drm"
  476 device          radeondrm
  477 device          sisdrm
  478 device          tdfxdrm
  479 
  480 options         DRM_DEBUG
  481 
  482 #
  483 # mse: Logitech and ATI InPort bus mouse ports
  484 
  485 device          mse
  486 hint.mse.0.at="isa"
  487 hint.mse.0.port="0x23c"
  488 hint.mse.0.irq="5"
  489 
  490 #
  491 # Network interfaces:
  492 #
  493 
  494 # ar:   Arnet SYNC/570i hdlc sync 2/4 port V.35/X.21 serial driver
  495 #       (requires sppp)
  496 # arl:  Aironet Arlan 655 wireless adapters.
  497 # ath:  Atheros a/b/g WiFi adapters (requires ath_hal and wlan)
  498 # cp:   Cronyx Tau-PCI sync single/dual/four port
  499 #       V.35/RS-232/RS-530/RS-449/X.21/G.703/E1/E3/T3/STS-1
  500 #       serial adaptor (requires sppp (default), or NETGRAPH if
  501 #       NETGRAPH_CRONYX is configured)
  502 # ctau: Cronyx Tau sync dual port V.35/RS-232/RS-530/RS-449/X.21/G.703/E1
  503 #       serial adaptor (requires sppp (default), or NETGRAPH if
  504 #       NETGRAPH_CRONYX is configured)
  505 # cx:   Cronyx Sigma multiport sync/async adapter (requires sppp (default),
  506 #       or NETGRAPH if NETGRAPH_CRONYX is configured)
  507 # ed:   Western Digital and SMC 80xx; Novell NE1000 and NE2000; 3Com 3C503
  508 #       HP PC Lan+, various PC Card devices (refer to etc/defaults/pccard.conf)
  509 #       (requires miibus)
  510 # el:   3Com 3C501 (slow!)
  511 # ie:   AT&T StarLAN 10 and EN100; 3Com 3C507; unknown NI5210;
  512 #       Intel EtherExpress
  513 # lnc:  Lance/PCnet cards (Isolan, Novell NE2100, NE32-VL, AMD Am7990 and
  514 #       Am79C960)
  515 # oltr: Olicom ISA token-ring adapters OC-3115, OC-3117, OC-3118 and OC-3133.
  516 #       Olicom PCI token-ring adapters OC-3136, OC-3137, OC-3139, OC-3140,
  517 #       OC-3141, OC-3540 and OC-3250.
  518 # sbni: Granch SBNI12-xx ISA and PCI adapters
  519 # sr:   RISCom/N2 hdlc sync 1/2 port V.35/X.21 serial driver (requires sppp)
  520 # wl:   Lucent Wavelan (ISA card only).
  521 
  522 # Order for ISA/EISA devices is important here
  523 
  524 device          ar
  525 hint.ar.0.at="isa"
  526 hint.ar.0.port="0x300"
  527 hint.ar.0.irq="10"
  528 hint.ar.0.maddr="0xd0000"
  529 device          arl
  530 hint.arl.0.at="isa"
  531 hint.arl.0.irq="9"
  532 hint.arl.0.maddr="0xd0000"
  533 device          cp
  534 device          ctau
  535 hint.ctau.0.at="isa"
  536 hint.ctau.0.port="0x240"
  537 hint.ctau.0.irq="15"
  538 hint.ctau.0.drq="7"
  539 device          cx
  540 hint.cx.0.at="isa"
  541 hint.cx.0.port="0x240"
  542 hint.cx.0.irq="15"
  543 hint.cx.0.drq="7"
  544 #options        NETGRAPH_CRONYX         # Enable NETGRAPH support for Cronyx adapter(s)
  545 device          ed
  546 #options        ED_NO_MIIBUS            # Disable ed miibus support
  547 hint.ed.0.at="isa"
  548 hint.ed.0.port="0x280"
  549 hint.ed.0.irq="5"
  550 hint.ed.0.maddr="0xd8000"
  551 device          el
  552 hint.el.0.at="isa"
  553 hint.el.0.port="0x300"
  554 hint.el.0.irq="9"
  555 device          ie                      # Hints only required for Starlan
  556 hint.ie.2.at="isa"
  557 hint.ie.2.port="0x300"
  558 hint.ie.2.irq="5"
  559 hint.ie.2.maddr="0xd0000"
  560 device          lnc
  561 hint.lnc.0.at="isa"
  562 hint.lnc.0.port="0x280"
  563 hint.lnc.0.irq="10"
  564 hint.lnc.0.drq="0"
  565 device          sbni
  566 hint.sbni.0.at="isa"
  567 hint.sbni.0.port="0x210"
  568 hint.sbni.0.irq="0xefdead"
  569 hint.sbni.0.flags="0"
  570 device          sr
  571 hint.sr.0.at="isa"
  572 hint.sr.0.port="0x300"
  573 hint.sr.0.irq="5"
  574 hint.sr.0.maddr="0xd0000"
  575 device          oltr
  576 hint.oltr.0.at="isa"
  577 device          wl
  578 hint.wl.0.at="isa"
  579 hint.wl.0.port="0x300"
  580 options         WLCACHE         # enables the signal-strength cache
  581 options         WLDEBUG         # enables verbose debugging output
  582 
  583 device          ath
  584 device          ath_hal         # Atheros HAL (includes binary component)
  585 #device         wlan            # 802.11 layer
  586 
  587 #
  588 # ATA raid adapters
  589 #
  590 device          pst
  591 
  592 #
  593 # 3ware 9000 series PATA/SATA RAID controller driver and options.
  594 # The driver is implemented as a SIM, and so, needs the CAM infrastructure.
  595 #
  596 options         TWA_DEBUG               # 0-10; 10 prints the most messages.
  597 options         TWA_FLASH_FIRMWARE      # firmware image bundled when defined.
  598 device          twa                     # 3ware 9000 series PATA/SATA RAID
  599 
  600 #
  601 # SCSI host adapters:
  602 #
  603 # ncv: NCR 53C500 based SCSI host adapters.
  604 # nsp: Workbit Ninja SCSI-3 based PC Card SCSI host adapters.
  605 # stg: TMC 18C30, 18C50 based SCSI host adapters.
  606 
  607 device          ncv
  608 device          nsp
  609 device          stg
  610 hint.stg.0.at="isa"
  611 hint.stg.0.port="0x140"
  612 hint.stg.0.port="11"
  613 
  614 #
  615 # Adaptec FSA RAID controllers, including integrated DELL controllers,
  616 # the Dell PERC 2/QC and the HP NetRAID-4M
  617 device          aac
  618 device          aacp    # SCSI Passthrough interface (optional, CAM required)
  619 
  620 #
  621 # Highpoint RocketRAID 182x.  This is really just software RAID on a
  622 # Marvell SATA chip.
  623 device          hptmv
  624 
  625 #
  626 # IBM (now Adaptec) ServeRAID controllers
  627 device          ips
  628 
  629 #
  630 # SafeNet crypto driver: can be moved to the MI NOTES as soon as
  631 # it's tested on a big-endian machine
  632 #
  633 device          safe            # SafeNet 1141
  634 options         SAFE_DEBUG      # enable debugging support: hw.safe.debug
  635 options         SAFE_RNDTEST    # enable rndtest support
  636 
  637 #####################################################################
  638 
  639 #
  640 # Miscellaneous hardware:
  641 #
  642 # apm: Laptop Advanced Power Management (experimental)
  643 # pmtimer: Timer device driver for power management events (APM or ACPI)
  644 # cy: Cyclades serial driver
  645 # digi: Digiboard driver
  646 # spic: Sony Programmable I/O controller (VAIO notebooks)
  647 
  648 # Notes on APM
  649 #  The flags takes the following meaning for apm0:
  650 #    0x0020  Statclock is broken.
  651 
  652 # Notes on the Specialix SI/XIO driver:
  653 #  The host card is memory, not IO mapped.
  654 #  The Rev 1 host cards use a 64K chunk, on a 32K boundary.
  655 #  The Rev 2 host cards use a 32K chunk, on a 32K boundary.
  656 #  The cards can use an IRQ of 11, 12 or 15.
  657 
  658 # Notes on the Sony Programmable I/O controller
  659 #  This is a temporary driver that should someday be replaced by something
  660 #  that hooks into the ACPI layer.  The device is hooked to the PIIX4's
  661 #  General Device 10 decoder, which means you have to fiddle with PCI
  662 #  registers to map it in, even though it is otherwise treated here as
  663 #  an ISA device.  At the moment, the driver polls, although the device
  664 #  is capable of generating interrupts.  It largely undocumented.
  665 #  The port location in the hint is where you WANT the device to be
  666 #  mapped.  0x10a0 seems to be traditional.  At the moment the jogdial
  667 #  is the only thing truly supported, but apparently a fair percentage
  668 #  of the Vaio extra features are controlled by this device.
  669 
  670 device          apm
  671 hint.apm.0.flags="0x20"
  672 device          pmtimer                 # Adjust system timer at wakeup time
  673 device          cy
  674 options         CY_PCI_FASTINTR         # Use with cy_pci unless irq is shared
  675 hint.cy.0.at="isa"
  676 hint.cy.0.irq="10"
  677 hint.cy.0.maddr="0xd4000"
  678 hint.cy.0.msize="0x2000"
  679 device          digi
  680 hint.digi.0.at="isa"
  681 hint.digi.0.port="0x104"
  682 hint.digi.0.maddr="0xd0000"
  683 # BIOS & FEP/OS components of device digi.
  684 device          digi_CX
  685 device          digi_CX_PCI
  686 device          digi_EPCX
  687 device          digi_EPCX_PCI
  688 device          digi_Xe
  689 device          digi_Xem
  690 device          digi_Xr
  691 device          spic
  692 hint.spic.0.at="isa"
  693 hint.spic.0.port="0x10a0"
  694 # sx device is i386 and pc98 only at the moment.
  695 device          sx
  696 options         SX_DEBUG
  697 # HOT1 Xilinx 6200 card (http://www.vcc.com/)
  698 device          xrpu
  699 
  700 #
  701 # Laptop/Notebook options:
  702 #
  703 # See also:
  704 #  apm under `Miscellaneous hardware'
  705 # above.
  706 
  707 # For older notebooks that signal a powerfail condition (external
  708 # power supply dropped, or battery state low) by issuing an NMI:
  709 
  710 options         POWERFAIL_NMI   # make it beep instead of panicing
  711 
  712 #
  713 # I2C Bus
  714 #
  715 # Philips i2c bus support is provided by the `iicbus' device.
  716 #
  717 # Supported interfaces:
  718 # pcf   Philips PCF8584 ISA-bus controller
  719 #
  720 device          pcf
  721 hint.pcf.0.at="isa"
  722 hint.pcf.0.port="0x320"
  723 hint.pcf.0.irq="5"
  724 
  725 #---------------------------------------------------------------------------
  726 # ISDN4BSD
  727 #
  728 # See /usr/share/examples/isdn/ROADMAP for an introduction to isdn4bsd.
  729 #
  730 # i4b passive ISDN cards support contains the following hardware drivers:
  731 #
  732 #       isic  - Siemens/Infineon ISDN ISAC/HSCX/IPAC chipset driver
  733 #       iwic  - Winbond W6692 PCI bus ISDN S/T interface controller
  734 #       ifpi  - AVM Fritz!Card PCI driver
  735 #       ifpi2  - AVM Fritz!Card PCI version 2 driver
  736 #       ihfc  - Cologne Chip HFC ISA/ISA-PnP chipset driver
  737 #       ifpnp - AVM Fritz!Card PnP driver
  738 #       itjc  - Siemens ISAC / TJNet Tiger300/320 chipset
  739 #
  740 # i4b active ISDN cards support contains the following hardware drivers:
  741 #
  742 #       iavc  - AVM B1 PCI, AVM B1 ISA, AVM T1
  743 #
  744 # Note that the ``options'' (if given) and ``device'' lines must BOTH
  745 # be uncommented to enable support for a given card !
  746 #
  747 # In addition to a hardware driver (and probably an option) the mandatory
  748 # ISDN protocol stack devices and the mandatory support device must be
  749 # enabled as well as one or more devices from the optional devices section.
  750 #
  751 #---------------------------------------------------------------------------
  752 #       isic driver (Siemens/Infineon chipsets)
  753 #
  754 device  isic
  755 #
  756 # ISA bus non-PnP Cards:
  757 # ----------------------
  758 #
  759 # Teles S0/8 or Niccy 1008
  760 options         TEL_S0_8
  761 hint.isic.0.at="isa"
  762 hint.isic.0.maddr="0xd0000"
  763 hint.isic.0.irq="5"
  764 hint.isic.0.flags="1"
  765 #
  766 # Teles S0/16 or Creatix ISDN-S0 or Niccy 1016
  767 options         TEL_S0_16
  768 hint.isic.0.at="isa"
  769 hint.isic.0.port="0xd80"
  770 hint.isic.0.maddr="0xd0000"
  771 hint.isic.0.irq="5"
  772 hint.isic.0.flags="2"
  773 #
  774 # Teles S0/16.3
  775 options         TEL_S0_16_3
  776 hint.isic.0.at="isa"
  777 hint.isic.0.port="0xd80"
  778 hint.isic.0.irq="5"
  779 hint.isic.0.flags="3"
  780 #
  781 # AVM A1 or AVM Fritz!Card
  782 options         AVM_A1
  783 hint.isic.0.at="isa"
  784 hint.isic.0.port="0x340"
  785 hint.isic.0.irq="5"
  786 hint.isic.0.flags="4"
  787 #
  788 # USRobotics Sportster ISDN TA intern
  789 options         USR_STI
  790 hint.isic.0.at="isa"
  791 hint.isic.0.port="0x268"
  792 hint.isic.0.irq="5"
  793 hint.isic.0.flags="7"
  794 #
  795 # ITK ix1 Micro ( < V.3, non-PnP version )
  796 options         ITKIX1
  797 hint.isic.0.at="isa"
  798 hint.isic.0.port="0x398"
  799 hint.isic.0.irq="10"
  800 hint.isic.0.flags="18"
  801 #
  802 # ELSA PCC-16
  803 options         ELSA_PCC16
  804 hint.isic.0.at="isa"
  805 hint.isic.0.port="0x360"
  806 hint.isic.0.irq="10"
  807 hint.isic.0.flags="20"
  808 #
  809 # ISA bus PnP Cards:
  810 # ------------------
  811 #
  812 # Teles S0/16.3 PnP
  813 options         TEL_S0_16_3_P
  814 #
  815 # Creatix ISDN-S0 P&P
  816 options         CRTX_S0_P
  817 #
  818 # Dr. Neuhaus Niccy Go@
  819 options         DRN_NGO
  820 #
  821 # Sedlbauer Win Speed
  822 options         SEDLBAUER
  823 #
  824 # Dynalink IS64PH
  825 options         DYNALINK
  826 #
  827 # ELSA QuickStep 1000pro ISA
  828 options         ELSA_QS1ISA
  829 #
  830 # Siemens I-Surf 2.0
  831 options         SIEMENS_ISURF2
  832 #
  833 # Asuscom ISDNlink 128K ISA
  834 options         ASUSCOM_IPAC
  835 #
  836 # Eicon Diehl DIVA 2.0 and 2.02
  837 options         EICON_DIVA
  838 #
  839 # Compaq Microcom 610 ISDN card (Compaq series PSB2222I)
  840 options         COMPAQ_M610
  841 #
  842 # PCI bus Cards:
  843 # --------------
  844 #
  845 # ELSA MicroLink ISDN/PCI (same as ELSA QuickStep 1000pro PCI)
  846 options         ELSA_QS1PCI
  847 #
  848 #---------------------------------------------------------------------------
  849 #       ifpnp driver for AVM Fritz!Card PnP
  850 #
  851 # AVM Fritz!Card PnP
  852 device          ifpnp
  853 #
  854 #---------------------------------------------------------------------------
  855 #       ihfc driver for Cologne Chip ISA chipsets (experimental!)
  856 #
  857 # Teles 16.3c ISA PnP
  858 # AcerISDN P10 ISA PnP
  859 # TELEINT ISDN SPEED No.1
  860 device          ihfc
  861 #
  862 #---------------------------------------------------------------------------
  863 #       ifpi driver for AVM Fritz!Card PCI
  864 #
  865 # AVM Fritz!Card PCI
  866 device          ifpi
  867 #
  868 #---------------------------------------------------------------------------
  869 #       ifpi2 driver for AVM Fritz!Card PCI version 2
  870 #
  871 # AVM Fritz!Card PCI version 2
  872 device          "ifpi2"
  873 #
  874 #---------------------------------------------------------------------------
  875 #       iwic driver for Winbond W6692 chipset
  876 #
  877 # ASUSCOM P-IN100-ST-D (and other Winbond W6692 based cards)
  878 device          iwic
  879 #
  880 #---------------------------------------------------------------------------
  881 #       itjc driver for Siemens ISAC / TJNet Tiger300/320 chipset
  882 #
  883 # Traverse Technologies NETjet-S
  884 # Teles PCI-TJ
  885 device          itjc
  886 #
  887 #---------------------------------------------------------------------------
  888 #       iavc driver (AVM active cards, needs i4bcapi driver!)
  889 #
  890 device          iavc
  891 #
  892 # AVM B1 ISA bus (PnP mode not supported!)
  893 # ----------------------------------------
  894 hint.iavc.0.at="isa"
  895 hint.iavc.0.port="0x150"
  896 hint.iavc.0.irq="5"
  897 #
  898 #---------------------------------------------------------------------------
  899 #       ISDN Protocol Stack - mandatory for all hardware drivers
  900 #
  901 # Q.921 / layer 2 - i4b passive cards D channel handling
  902 device          "i4bq921"
  903 #
  904 # Q.931 / layer 3 - i4b passive cards D channel handling
  905 device          "i4bq931"
  906 #
  907 # layer 4 - i4b common passive and active card handling
  908 device          "i4b"
  909 #
  910 #---------------------------------------------------------------------------
  911 #       ISDN devices - mandatory for all hardware drivers
  912 #
  913 # userland driver to do ISDN tracing (for passive cards only)
  914 device          "i4btrc"        4
  915 #
  916 # userland driver to control the whole thing
  917 device          "i4bctl"
  918 #
  919 #---------------------------------------------------------------------------
  920 #       ISDN devices - optional
  921 #
  922 # userland driver for access to raw B channel
  923 device          "i4brbch"       4
  924 #
  925 # userland driver for telephony
  926 device          "i4btel"        2
  927 #
  928 # network driver for IP over raw HDLC ISDN
  929 device          "i4bipr"        4
  930 # enable VJ header compression detection for ipr i/f
  931 options         IPR_VJ
  932 # enable logging of the first n IP packets to isdnd (n=32 here)
  933 options         IPR_LOG=32
  934 #
  935 # network driver for sync PPP over ISDN; requires an equivalent
  936 # number of sppp device to be configured
  937 device          "i4bisppp"      4
  938 #
  939 # B-channel interface to the netgraph subsystem
  940 device          "i4bing"        2
  941 #
  942 # CAPI driver needed for active ISDN cards (see iavc driver above)
  943 device          "i4bcapi"
  944 #
  945 #---------------------------------------------------------------------------
  946 
  947 #
  948 # System Management Bus (SMB)
  949 #
  950 options         ENABLE_ALART            # Control alarm on Intel intpm driver
  951 
  952 #
  953 # Set the number of PV entries per process.  Increasing this can
  954 # stop panics related to heavy use of shared memory.  However, that can
  955 # (combined with large amounts of physical memory) cause panics at
  956 # boot time due the kernel running out of VM space.
  957 #
  958 # If you're tweaking this, you might also want to increase the sysctls
  959 # "vm.v_free_min", "vm.v_free_reserved", and "vm.v_free_target".
  960 #
  961 # The value below is the one more than the default.
  962 #
  963 options         PMAP_SHPGPERPROC=201
  964 
  965 #
  966 # Change the size of the kernel virtual address space.  Due to
  967 # constraints in loader(8) on i386, this must be a multiple of 4.
  968 # 256 = 1 GB of kernel address space.  Increasing this also causes
  969 # a reduction of the address space in user processes.  512 splits
  970 # the 4GB cpu address space in half (2GB user, 2GB kernel).
  971 #
  972 options         KVA_PAGES=260
  973 
  974 
  975 #####################################################################
  976 # ABI Emulation
  977 
  978 # Enable iBCS2 runtime support for SCO and ISC binaries
  979 options         IBCS2
  980 
  981 # Emulate spx device for client side of SVR3 local X interface
  982 options         SPX_HACK
  983 
  984 # Enable Linux ABI emulation
  985 options         COMPAT_LINUX
  986 
  987 # Enable i386 a.out binary support
  988 options         COMPAT_AOUT
  989 
  990 # Enable the linux-like proc filesystem support (requires COMPAT_LINUX
  991 # and PSEUDOFS)
  992 options         LINPROCFS
  993 
  994 #
  995 # SysVR4 ABI emulation
  996 #
  997 # The svr4 ABI emulator can be statically compiled into the kernel or loaded as
  998 # a KLD module.
  999 # The STREAMS network emulation code can also be compiled statically or as a
 1000 # module.  If loaded as a module, it must be loaded before the svr4 module
 1001 # (the /usr/sbin/svr4 script does this for you).  If compiling statically,
 1002 # the `streams' device must be configured into any kernel which also
 1003 # specifies COMPAT_SVR4.  It is possible to have a statically-configured
 1004 # STREAMS device and a dynamically loadable svr4 emulator;  the /usr/sbin/svr4
 1005 # script understands that it doesn't need to load the `streams' module under
 1006 # those circumstances.
 1007 # Caveat:  At this time, `options KTRACE' is required for the svr4 emulator
 1008 # (whether static or dynamic).
 1009 #
 1010 options         COMPAT_SVR4     # build emulator statically
 1011 options         DEBUG_SVR4      # enable verbose debugging
 1012 device          streams         # STREAMS network driver (required for svr4).
 1013 
 1014 
 1015 #####################################################################
 1016 # VM OPTIONS
 1017 
 1018 # Disable the 4 MByte page PSE CPU feature.  The PSE feature allows the
 1019 # kernel to use 4 MByte pages to map the kernel instead of 4k pages.
 1020 # This saves on the amount of memory needed for page tables needed to
 1021 # map the kernel.  You should only disable this feature as a temporary
 1022 # workaround if you are having problems with it enabled.
 1023 #
 1024 #options        DISABLE_PSE
 1025 
 1026 # Disable the global pages PGE CPU feature.  The PGE feature allows pages
 1027 # to be marked with the PG_G bit.  TLB entries for these pages are not
 1028 # flushed from the cache when %cr3 is reloaded.  This can make context
 1029 # switches less expensive.  You should only disable this feature as a
 1030 # temporary workaround if you are having problems with it enabled.
 1031 #
 1032 #options        DISABLE_PG_G
 1033 
 1034 # KSTACK_PAGES is the number of memory pages to assign to the kernel
 1035 # stack of each thread.
 1036 
 1037 options         KSTACK_PAGES=3
 1038 
 1039 #####################################################################
 1040 
 1041 # More undocumented options for linting.
 1042 # Note that documenting these are not considered an affront.
 1043 
 1044 options         FB_INSTALL_CDEV         # install a CDEV entry in /dev
 1045 
 1046 # PECOFF module (Win32 Execution Format)
 1047 options         PECOFF_SUPPORT
 1048 options         PECOFF_DEBUG
 1049 
 1050 options         I4B_SMP_WORKAROUND
 1051 options         I586_PMC_GUPROF=0x70000
 1052 options         KBDIO_DEBUG=2
 1053 options         KBD_MAXRETRY=4
 1054 options         KBD_MAXWAIT=6
 1055 options         KBD_RESETDELAY=201
 1056 
 1057 options         PSM_DEBUG=1
 1058 
 1059 options         TIMER_FREQ=((14318182+6)/12)
 1060 
 1061 options         VM_KMEM_SIZE
 1062 options         VM_KMEM_SIZE_MAX
 1063 options         VM_KMEM_SIZE_SCALE
 1064 
 1065 
 1066 # The I/O device
 1067 device          io

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