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/5.0/sys/i386/conf/NOTES 106658 2002-11-08 20:04:38Z jhb $
    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 # APIC_IO enables the use of the IO APIC for Symmetric I/O.
   26 #
   27 # Notes:
   28 #
   29 #  An SMP kernel will ONLY run on an Intel MP spec. qualified motherboard.
   30 #
   31 #  Be sure to disable 'cpu I386_CPU' && 'cpu I486_CPU' for SMP kernels.
   32 #
   33 #  Check the 'Rogue SMP hardware' section to see if additional options
   34 #   are required by your hardware.
   35 #
   36 
   37 # Mandatory:
   38 options         APIC_IO                 # Symmetric (APIC) I/O
   39 
   40 #
   41 # Rogue SMP hardware:
   42 #
   43 
   44 # Bridged PCI cards:
   45 #
   46 # The MP tables of most of the current generation MP motherboards
   47 #  do NOT properly support bridged PCI cards.  To use one of these
   48 #  cards you should refer to ???
   49 
   50 
   51 #####################################################################
   52 # CPU OPTIONS
   53 
   54 #
   55 # You must specify at least one CPU (the one you intend to run on);
   56 # deleting the specification for CPUs you don't need to use may make
   57 # parts of the system run faster.
   58 # I386_CPU is mutually exclusive with the other CPU types.
   59 #
   60 #cpu            I386_CPU                
   61 cpu             I486_CPU
   62 cpu             I586_CPU                # aka Pentium(tm)
   63 cpu             I686_CPU                # aka Pentium Pro(tm)
   64 
   65 #
   66 # Options for CPU features.
   67 #
   68 # CPU_ATHLON_SSE_HACK tries to enable SSE instructions when the BIOS has
   69 # forgotten to enable them.
   70 #
   71 # CPU_BLUELIGHTNING_FPU_OP_CACHE enables FPU operand cache on IBM
   72 # BlueLightning CPU.  It works only with Cyrix FPU, and this option
   73 # should not be used with Intel FPU.
   74 #
   75 # CPU_BLUELIGHTNING_3X enables triple-clock mode on IBM Blue Lightning
   76 # CPU if CPU supports it. The default is double-clock mode on
   77 # BlueLightning CPU box.
   78 #
   79 # CPU_BTB_EN enables branch target buffer on Cyrix 5x86 (NOTE 1).
   80 #
   81 # CPU_DIRECT_MAPPED_CACHE sets L1 cache of Cyrix 486DLC CPU in direct
   82 # mapped mode.  Default is 2-way set associative mode.
   83 #
   84 # CPU_CYRIX_NO_LOCK enables weak locking for the entire address space
   85 # of Cyrix 6x86 and 6x86MX CPUs by setting the NO_LOCK bit of CCR1.
   86 # Otherwise, the NO_LOCK bit of CCR1 is cleared.  (NOTE 3)
   87 #
   88 # CPU_DISABLE_5X86_LSSER disables load store serialize (i.e. enables
   89 # reorder).  This option should not be used if you use memory mapped
   90 # I/O device(s).
   91 #
   92 # CPU_ELAN enables support for AMDs ElanSC520 CPU.
   93 #
   94 # CPU_ENABLE_SSE enables SSE/MMX2 instructions support.  This is default
   95 # on I686_CPU and above.
   96 # CPU_DISABLE_SSE explicitly prevent I686_CPU from turning on SSE.
   97 #
   98 # CPU_FASTER_5X86_FPU enables faster FPU exception handler.
   99 #
  100 # CPU_I486_ON_386 enables CPU cache on i486 based CPU upgrade products
  101 # for i386 machines.
  102 #
  103 # CPU_IORT defines I/O clock delay time (NOTE 1).  Default values of
  104 # I/O clock delay time on Cyrix 5x86 and 6x86 are 0 and 7,respectively
  105 # (no clock delay).
  106 #
  107 # CPU_L2_LATENCY specifed the L2 cache latency value.  This option is used
  108 # only when CPU_PPRO2CELERON is defined and Mendocino Celeron is detected.
  109 # The default value is 5.
  110 #
  111 # CPU_LOOP_EN prevents flushing the prefetch buffer if the destination
  112 # of a jump is already present in the prefetch buffer on Cyrix 5x86(NOTE
  113 # 1).
  114 #
  115 # CPU_PPRO2CELERON enables L2 cache of Mendocino Celeron CPUs.  This option
  116 # is useful when you use Socket 8 to Socket 370 converter, because most Pentium
  117 # Pro BIOSs do not enable L2 cache of Mendocino Celeron CPUs.
  118 #
  119 # CPU_RSTK_EN enables return stack on Cyrix 5x86 (NOTE 1).
  120 #
  121 # CPU_SUSP_HLT enables suspend on HALT.  If this option is set, CPU
  122 # enters suspend mode following execution of HALT instruction.
  123 #
  124 # CPU_UPGRADE_HW_CACHE eliminates unneeded cache flush instruction(s).
  125 #
  126 # CPU_WT_ALLOC enables write allocation on Cyrix 6x86/6x86MX and AMD
  127 # K5/K6/K6-2 cpus.
  128 #
  129 # CYRIX_CACHE_WORKS enables CPU cache on Cyrix 486 CPUs with cache
  130 # flush at hold state.
  131 #
  132 # CYRIX_CACHE_REALLY_WORKS enables (1) CPU cache on Cyrix 486 CPUs
  133 # without cache flush at hold state, and (2) write-back CPU cache on
  134 # Cyrix 6x86 whose revision < 2.7 (NOTE 2).
  135 #
  136 # NO_F00F_HACK disables the hack that prevents Pentiums (and ONLY
  137 # Pentiums) from locking up when a LOCK CMPXCHG8B instruction is
  138 # executed.  This option is only needed if I586_CPU is also defined,
  139 # and should be included for any non-Pentium CPU that defines it.
  140 #
  141 # NO_MEMORY_HOLE is an optimisation for systems with AMD K6 processors
  142 # which indicates that the 15-16MB range is *definitely* not being
  143 # occupied by an ISA memory hole.
  144 #
  145 # CPU_DISABLE_CMPXCHG disables the CMPXCHG instruction on > i386 IA32 
  146 # machines.  VmWare seems to emulate this instruction poorly, causing 
  147 # the guest OS to run very slowly.  Enabling this with a SMP kernel
  148 # will cause the kernel to be unusable.
  149 #
  150 # NOTE 1: The options, CPU_BTB_EN, CPU_LOOP_EN, CPU_IORT,
  151 # CPU_LOOP_EN and CPU_RSTK_EN should not be used because of CPU bugs.
  152 # These options may crash your system.
  153 #
  154 # NOTE 2: If CYRIX_CACHE_REALLY_WORKS is not set, CPU cache is enabled
  155 # in write-through mode when revision < 2.7.  If revision of Cyrix
  156 # 6x86 >= 2.7, CPU cache is always enabled in write-back mode.
  157 #
  158 # NOTE 3: This option may cause failures for software that requires
  159 # locked cycles in order to operate correctly.
  160 #
  161 options         CPU_ATHLON_SSE_HACK
  162 options         CPU_BLUELIGHTNING_FPU_OP_CACHE
  163 options         CPU_BLUELIGHTNING_3X
  164 options         CPU_BTB_EN
  165 options         CPU_DIRECT_MAPPED_CACHE
  166 options         CPU_DISABLE_5X86_LSSER
  167 options         CPU_ELAN
  168 options         CPU_ENABLE_SSE
  169 #options        CPU_DISABLE_SSE
  170 options         CPU_FASTER_5X86_FPU
  171 options         CPU_I486_ON_386
  172 options         CPU_IORT
  173 options         CPU_L2_LATENCY=5
  174 options         CPU_LOOP_EN
  175 options         CPU_PPRO2CELERON
  176 options         CPU_RSTK_EN
  177 options         CPU_SUSP_HLT
  178 options         CPU_UPGRADE_HW_CACHE
  179 options         CPU_WT_ALLOC
  180 options         CYRIX_CACHE_WORKS
  181 options         CYRIX_CACHE_REALLY_WORKS
  182 #options        NO_F00F_HACK
  183 options         CPU_DISABLE_CMPXCHG
  184 
  185 #
  186 # A math emulator is mandatory if you wish to run on hardware which
  187 # does not have a floating-point processor.  Pick either the original,
  188 # bogus (but freely-distributable) math emulator, or a much more
  189 # fully-featured but GPL-licensed emulator taken from Linux.
  190 #
  191 options         MATH_EMULATE            #Support for x87 emulation
  192 # Don't enable both of these in a real config.
  193 options         GPL_MATH_EMULATE        #Support for x87 emulation via
  194                                         #new math emulator
  195 
  196 #
  197 # PERFMON causes the driver for Pentium/Pentium Pro performance counters
  198 # to be compiled.  See perfmon(4) for more information.
  199 #
  200 options         PERFMON
  201 
  202 
  203 #####################################################################
  204 # NETWORKING OPTIONS
  205 
  206 #
  207 # DEVICE_POLLING adds support for mixed interrupt-polling handling
  208 # of network device drivers, which has significant benefits in terms
  209 # of robustness to overloads and responsivity, as well as permitting
  210 # accurate scheduling of the CPU time between kernel network processing
  211 # and other activities. The drawback is a moderate (up to 1/HZ seconds)
  212 # potential increase in response times.
  213 # It is strongly recommended to use HZ=1000 or 2000 with DEVICE_POLLING
  214 # to achieve smoother behaviour.
  215 # Additionally, you can enable/disable polling at runtime with the
  216 # sysctl variable kern.polling.enable (defaults off), and select
  217 # the CPU fraction reserved to userland with the sysctl variable
  218 # kern.polling.user_frac (default 50, range 0..100).
  219 #
  220 # Only the "dc" "fxp" and "sis" devices support this mode of operation at
  221 # the time of this writing.
  222 
  223 options         DEVICE_POLLING
  224 
  225 
  226 #####################################################################
  227 # CLOCK OPTIONS
  228 
  229 # The following options are used for debugging clock behavior only, and
  230 # should not be used for production systems.
  231 #
  232 # CLK_CALIBRATION_LOOP will run the clock calibration loop at startup
  233 # until the user presses a key.
  234 
  235 options         CLK_CALIBRATION_LOOP
  236 
  237 # The following two options measure the frequency of the corresponding
  238 # clock relative to the RTC (onboard mc146818a).
  239 
  240 options         CLK_USE_I8254_CALIBRATION
  241 options         CLK_USE_TSC_CALIBRATION
  242 
  243 
  244 #####################################################################
  245 # MISCELLANEOUS DEVICES AND OPTIONS
  246 
  247 device          speaker         #Play IBM BASIC-style noises out your speaker
  248 hint.speaker.0.at="isa"
  249 hint.speaker.0.port="0x61"
  250 device          gzip            #Exec gzipped a.out's. REQUIRES COMPAT_AOUT!
  251 device          apm_saver       # Requires APM
  252 
  253 
  254 #####################################################################
  255 # HARDWARE BUS CONFIGURATION
  256 
  257 #
  258 # ISA bus
  259 #
  260 device          isa
  261 
  262 #
  263 # Options for `isa':
  264 #
  265 # AUTO_EOI_1 enables the `automatic EOI' feature for the master 8259A
  266 # interrupt controller.  This saves about 0.7-1.25 usec for each interrupt.
  267 # This option breaks suspend/resume on some portables.
  268 #
  269 # AUTO_EOI_2 enables the `automatic EOI' feature for the slave 8259A
  270 # interrupt controller.  This saves about 0.7-1.25 usec for each interrupt.
  271 # Automatic EOI is documented not to work for for the slave with the
  272 # original i8259A, but it works for some clones and some integrated
  273 # versions.
  274 #
  275 # MAXMEM specifies the amount of RAM on the machine; if this is not
  276 # specified, FreeBSD will first read the amount of memory from the CMOS
  277 # RAM, so the amount of memory will initially be limited to 64MB or 16MB
  278 # depending on the BIOS.  If the BIOS reports 64MB, a memory probe will
  279 # then attempt to detect the installed amount of RAM.  If this probe
  280 # fails to detect >64MB RAM you will have to use the MAXMEM option.
  281 # The amount is in kilobytes, so for a machine with 128MB of RAM, it would
  282 # be 131072 (128 * 1024).
  283 #
  284 # BROKEN_KEYBOARD_RESET disables the use of the keyboard controller to
  285 # reset the CPU for reboot.  This is needed on some systems with broken
  286 # keyboard controllers.
  287 
  288 options         COMPAT_OLDISA   #Use ISA shims and glue for old drivers
  289 options         AUTO_EOI_1
  290 #options        AUTO_EOI_2
  291 
  292 options         MAXMEM=(128*1024)
  293 #options        BROKEN_KEYBOARD_RESET
  294 
  295 # 
  296 # EISA bus
  297 #
  298 # The EISA bus device is `eisa'.  It provides auto-detection and
  299 # configuration support for all devices on the EISA bus.
  300 
  301 device          eisa
  302 
  303 # By default, only 10 EISA slots are probed, since the slot numbers
  304 # above clash with the configuration address space of the PCI subsystem,
  305 # and the EISA probe is not very smart about this.  This is sufficient
  306 # for most machines, but in particular the HP NetServer LC series comes
  307 # with an onboard AIC7770 dual-channel SCSI controller on EISA slot #11,
  308 # thus you need to bump this figure to 12 for them.
  309 options         EISA_SLOTS=12
  310 
  311 #
  312 # MCA bus:
  313 #
  314 # The MCA bus device is `mca'.  It provides auto-detection and
  315 # configuration support for all devices on the MCA bus.
  316 # No hints are required for MCA.
  317 
  318 device          mca
  319 
  320 #
  321 # PCI bus & PCI options:
  322 #
  323 device          pci
  324 
  325 #
  326 # AGP GART support
  327 device          agp
  328 
  329 
  330 #####################################################################
  331 # HARDWARE DEVICE CONFIGURATION
  332 
  333 #
  334 # Mandatory devices:
  335 #
  336 
  337 # To include support for VGA VESA video modes
  338 options         VESA
  339 
  340 # Turn on extra debugging checks and output for VESA support.
  341 options         VESA_DEBUG
  342 
  343 # The pcvt console driver (vt220 compatible).
  344 device          vt
  345 hint.vt.0.at="isa"
  346 options         XSERVER                 # support for running an X server on vt
  347 options         FAT_CURSOR              # start with block cursor
  348 # This PCVT option is for keyboards such as those used on really old ThinkPads
  349 options         PCVT_SCANSET=2
  350 # Other PCVT options are documented in pcvt(4).
  351 options         PCVT_24LINESDEF
  352 options         PCVT_CTRL_ALT_DEL
  353 options         PCVT_META_ESC
  354 options         PCVT_NSCREENS=9
  355 options         PCVT_PRETTYSCRNS
  356 options         PCVT_SCREENSAVER
  357 options         PCVT_USEKBDSEC
  358 options         PCVT_VT220KEYB
  359 options         PCVT_GREENSAVER
  360 
  361 #
  362 # The Numeric Processing eXtension driver.  In addition to this, you
  363 # may configure a math emulator (see above).  If your machine has a
  364 # hardware FPU and the kernel configuration includes the npx device
  365 # *and* a math emulator compiled into the kernel, the hardware FPU
  366 # will be used, unless it is found to be broken or unless "flags" to
  367 # npx0 includes "0x08", which requests preference for the emulator.
  368 device          npx
  369 hint.npx.0.flags="0x0"
  370 hint.npx.0.irq="13"
  371 
  372 #
  373 # `flags' for npx0:
  374 #       0x01    don't use the npx registers to optimize bcopy.
  375 #       0x02    don't use the npx registers to optimize bzero.
  376 #       0x04    don't use the npx registers to optimize copyin or copyout.
  377 #       0x08    use emulator even if hardware FPU is available.
  378 # The npx registers are normally used to optimize copying and zeroing when
  379 # all of the following conditions are satisfied:
  380 #       I586_CPU is an option
  381 #       the cpu is an i586 (perhaps not a Pentium)
  382 #       the probe for npx0 succeeds
  383 #       INT 16 exception handling works.
  384 # Then copying and zeroing using the npx registers is normally 30-100% faster.
  385 # The flags can be used to control cases where it doesn't work or is slower.
  386 # Setting them at boot time using userconfig works right (the optimizations
  387 # are not used until later in the bootstrap when npx0 is attached).
  388 # Flag 0x08 automatically disables the i586 optimized routines.
  389 #
  390 
  391 #
  392 # Optional devices:
  393 #
  394 
  395 # 3Dfx Voodoo Graphics, Voodoo II /dev/3dfx CDEV support. This will create
  396 # the /dev/3dfx0 device to work with glide implementations. This should get
  397 # linked to /dev/3dfx and /dev/voodoo. Note that this is not the same as
  398 # the tdfx DRI module from XFree86 and is completely unrelated.
  399 #
  400 # To enable Linuxulator support, one must also include COMPAT_LINUX in the
  401 # config as well, or you will not have the dependencies. The other option
  402 # is to load both as modules.
  403 
  404 device          tdfx                    # Enable 3Dfx Voodoo support
  405 options         TDFX_LINUX              # Enable Linuxulator support
  406 
  407 #
  408 # ACPI support using the Intel ACPI Component Architecture reference
  409 # implementation.
  410 #
  411 # ACPI_DEBUG enables the use of the debug.acpi.level and debug.acpi.layer
  412 # kernel environment variables to select initial debugging levels for the
  413 # Intel ACPICA code.  (Note that the Intel code must also have USE_DEBUGGER
  414 # defined when it is built).
  415 #
  416 # Note that building ACPI into the kernel is deprecated; the module is
  417 # normally loaded automatically by the loader.
  418 #
  419 device          acpi
  420 options         ACPI_DEBUG
  421 
  422 # DRM options:
  423 # gammadrm:  3Dlabs Oxygen GMX 2000
  424 # mgadrm:    AGP Matrox G200, G400, G450, G550
  425 # tdfxdrm:   3dfx Voodoo 3/4/5 and Banshee
  426 # r128drm:   AGP ATI Rage 128
  427 # radeondrm: AGP ATI Radeon, including 7200 and 7500
  428 # DRM_LINUX: include linux compatibility, requires COMPAT_LINUX
  429 # DRM_DEBUG: inlcude debugging code, very slow
  430 #
  431 # mga, r128, and radeon require AGP in the kernel
  432 
  433 device          gammadrm
  434 device          mgadrm
  435 device          "r128drm"
  436 device          radeondrm
  437 device          tdfxdrm
  438 
  439 options         DRM_DEBUG
  440 options         DRM_LINUX
  441 
  442 # M-systems DiskOnchip products see src/sys/contrib/dev/fla/README
  443 device          fla
  444 hint.fla.0.at="isa"
  445 
  446 #
  447 # mse: Logitech and ATI InPort bus mouse ports
  448 
  449 device          mse
  450 hint.mse.0.at="isa"
  451 hint.mse.0.port="0x23c"
  452 hint.mse.0.irq="5"
  453 
  454 #
  455 # Network interfaces:
  456 #
  457 
  458 # ar:   Arnet SYNC/570i hdlc sync 2/4 port V.35/X.21 serial driver
  459 #       (requires sppp)
  460 # cx:   Cronyx/Sigma multiport sync/async (with Cisco or PPP framing)
  461 # ed:   Western Digital and SMC 80xx; Novell NE1000 and NE2000; 3Com 3C503
  462 #       HP PC Lan+, various PC Card devices (refer to etc/defauls/pccard.conf)
  463 #       (requires miibus)
  464 # el:   3Com 3C501 (slow!)
  465 # ie:   AT&T StarLAN 10 and EN100; 3Com 3C507; unknown NI5210;
  466 #       Intel EtherExpress
  467 # le:   Digital Equipment EtherWorks 2 and EtherWorks 3 (DEPCA, DE100,
  468 #       DE101, DE200, DE201, DE202, DE203, DE204, DE205, DE422)
  469 # lnc:  Lance/PCnet cards (Isolan, Novell NE2100, NE32-VL, AMD Am7990 and
  470 #       Am79C960)
  471 # oltr: Olicom ISA token-ring adapters OC-3115, OC-3117, OC-3118 and OC-3133
  472 #       (no hints needed).
  473 #       Olicom PCI token-ring adapters OC-3136, OC-3137, OC-3139, OC-3140,
  474 #       OC-3141, OC-3540, OC-3250
  475 # rdp:  RealTek RTL 8002-based pocket ethernet adapters
  476 # sbni: Granch SBNI12-xx ISA and PCI adapters
  477 # sr:   RISCom/N2 hdlc sync 1/2 port V.35/X.21 serial driver (requires sppp)
  478 # wl:   Lucent Wavelan (ISA card only).
  479 
  480 # Order for ISA/EISA devices is important here
  481 
  482 device          ar
  483 hint.ar.0.at="isa"
  484 hint.ar.0.port="0x300"
  485 hint.ar.0.irq="10"
  486 hint.ar.0.maddr="0xd0000"
  487 device          cx      1
  488 hint.cx.0.at="isa"
  489 hint.cx.0.port="0x240"
  490 hint.cx.0.irq="15"
  491 hint.cx.0.drq="7"
  492 device          ed
  493 #options        ED_NO_MIIBUS            # Disable ed miibus support
  494 hint.ed.0.at="isa"
  495 hint.ed.0.port="0x280"
  496 hint.ed.0.irq="5"
  497 hint.ed.0.maddr="0xd8000"
  498 device          el      1
  499 hint.el.0.at="isa"
  500 hint.el.0.port="0x300"
  501 hint.el.0.irq="9"
  502 device          ie      2
  503 hint.ie.0.at="isa"
  504 hint.ie.0.port="0x300"
  505 hint.ie.0.irq="5"
  506 hint.ie.0.maddr="0xd0000"
  507 hint.ie.1.at="isa"
  508 hint.ie.1.port="0x360"
  509 hint.ie.1.irq="7"
  510 hint.ie.1.maddr="0xd0000"
  511 device          le      1
  512 hint.le.0.at="isa"
  513 hint.le.0.port="0x300"
  514 hint.le.0.irq="5"
  515 hint.le.0.maddr="0xd0000"
  516 device          lnc
  517 hint.lnc.0.at="isa"
  518 hint.lnc.0.port="0x280"
  519 hint.lnc.0.irq="10"
  520 hint.lnc.0.drq="0"
  521 device          rdp     1
  522 hint.rdp.0.at="isa"
  523 hint.rdp.0.port="0x378"
  524 hint.rdp.0.irq="7"
  525 hint.rdp.0.flags="2"
  526 device          sbni
  527 hint.sbni.0.at="isa"
  528 hint.sbni.0.port="0x210"
  529 hint.sbni.0.irq="0xefdead"
  530 hint.sbni.0.flags="0"
  531 device          sr
  532 hint.sr.0.at="isa"
  533 hint.sr.0.port="0x300"
  534 hint.sr.0.irq="5"
  535 hint.sr.0.maddr="0xd0000"
  536 device          oltr
  537 hint.oltr.0.at="isa"
  538 device          wl
  539 hint.wl.0.at="isa"
  540 hint.wl.0.port="0x300"
  541 options         WLCACHE         # enables the signal-strength cache
  542 options         WLDEBUG         # enables verbose debugging output
  543 
  544 #
  545 # Audio drivers: `pca'
  546 #
  547 # pca: PCM audio through your PC speaker
  548 
  549 device          pca
  550 hint.pca.0.at="isa"
  551 hint.pca.0.port="0x040"
  552 
  553 # 
  554 # SCSI host adapters:
  555 # 
  556 # ncv: NCR 53C500 based SCSI host adapters.
  557 # nsp: Workbit Ninja SCSI-3 based PC Card SCSI host adapters.
  558 # stg: TMC 18C30, 18C50 based SCSI host adapters.
  559 
  560 device          ncv
  561 device          nsp
  562 device          stg
  563 hint.stg.0.at="isa"
  564 hint.stg.0.port="0x140"
  565 hint.stg.0.port="11"
  566 
  567 #
  568 # Adaptec FSA RAID controllers, including integrated DELL controllers,
  569 # the Dell PERC 2/QC and the HP NetRAID-4M
  570 device          aac
  571 device          aacp    # SCSI Passthrough interface (optional, CAM required)
  572 
  573 #
  574 # Miscellaneous hardware:
  575 #
  576 # wt: Wangtek and Archive QIC-02/QIC-36 tape drives
  577 # ctx: Cortex-I frame grabber
  578 # apm: Laptop Advanced Power Management (experimental)
  579 # pmtimer: Timer device driver for power management events (APM or ACPI)
  580 # spigot: The Creative Labs Video Spigot video-acquisition board
  581 # dgb: Digiboard PC/Xi and PC/Xe series driver (ALPHA QUALITY!)
  582 # digi: Digiboard driver
  583 # gp:  National Instruments AT-GPIB and AT-GPIB/TNT board, PCMCIA-GPIB
  584 # asc: GI1904-based hand scanners, e.g. the Trust Amiscan Grey
  585 # gsc: Genius GS-4500 hand scanner.
  586 # tw: TW-523 power line interface for use with X-10 home control products
  587 # spic: Sony Programmable I/O controller (VAIO notebooks)
  588 # stl: Stallion EasyIO and EasyConnection 8/32 (cd1400 based)
  589 # stli: Stallion EasyConnection 8/64, ONboard, Brumby (intelligent)
  590 
  591 # Notes on APM
  592 #  The flags takes the following meaning for apm0:
  593 #    0x0020  Statclock is broken.
  594 #  If apm is omitted, some systems require sysctl kern.timecounter.method=1
  595 #  for correct timekeeping.
  596 
  597 # Notes on the spigot:
  598 #  The video spigot is at 0xad6.  This port address can not be changed.
  599 #  The irq values may only be 10, 11, or 15
  600 #  I/O memory is an 8kb region.  Possible values are:
  601 #    0a0000, 0a2000, ..., 0fffff, f00000, f02000, ..., ffffff
  602 #    The start address must be on an even boundary.
  603 #  Add the following option if you want to allow non-root users to be able
  604 #  to access the spigot.  This option is not secure because it allows users
  605 #  direct access to the I/O page.
  606 #       options SPIGOT_UNSECURE
  607 
  608 # Notes on the Specialix SI/XIO driver:
  609 #  The host card is memory, not IO mapped.
  610 #  The Rev 1 host cards use a 64K chunk, on a 32K boundary.
  611 #  The Rev 2 host cards use a 32K chunk, on a 32K boundary.
  612 #  The cards can use an IRQ of 11, 12 or 15.
  613 
  614 # Notes on the Sony Programmable I/O controller
  615 #  This is a temporary driver that should someday be replaced by something
  616 #  that hooks into the ACPI layer. The device is hooked to the PIIX4's
  617 #  General Device 10 decoder, which means you have to fiddle with PCI
  618 #  registers to map it in, even though it is otherwise treated here as
  619 #  an ISA device. At the moment, the driver polls, although the device
  620 #  is capable of generating interrupts. It largely undocumented.
  621 #  The port location in the hint is where you WANT the device to be
  622 #  mapped. 0x10a0 seems to be traditional. At the moment the jogdial
  623 #  is the only thing truly supported, but aparently a fair percentage
  624 #  of the Vaio extra features are controlled by this device.
  625 
  626 # Notes on the Stallion stl and stli drivers:
  627 #  See src/i386/isa/README.stl for complete instructions.
  628 #  This is version 0.0.5alpha, unsupported by Stallion.
  629 #  The stl driver has a secondary IO port hard coded at 0x280.  You need
  630 #     to change src/i386/isa/stallion.c if you reconfigure this on the boards.
  631 #  The "flags" and "msize" settings on the stli driver depend on the board:
  632 #       EasyConnection 8/64 ISA:     flags 23         msize 0x1000
  633 #       EasyConnection 8/64 EISA:    flags 24         msize 0x10000
  634 #       EasyConnection 8/64 MCA:     flags 25         msize 0x1000
  635 #       ONboard ISA:                 flags 4          msize 0x10000
  636 #       ONboard EISA:                flags 7          msize 0x10000
  637 #       ONboard MCA:                 flags 3          msize 0x10000
  638 #       Brumby:                      flags 2          msize 0x4000
  639 #       Stallion:                    flags 1          msize 0x10000
  640 
  641 # Notes on the Digiboard PC/Xi and PC/Xe series driver
  642 #               
  643 # The NDGBPORTS option specifies the number of ports controlled by the
  644 # dgb(4) driver.  The default value is 16 ports per device.
  645 #
  646 # The following flag values have special meanings in dgb:
  647 #       0x01 - alternate layout of pins
  648 #       0x02 - use the windowed PC/Xe in 64K mode
  649 
  650 device          wt      1
  651 hint.wt.0.at="isa"
  652 hint.wt.0.port="0x300"
  653 hint.wt.0.irq="5"
  654 hint.wt.0.drq="1"
  655 device          ctx     1
  656 hint.ctx.0.at="isa"
  657 hint.ctx.0.port="0x230"
  658 hint.ctx.0.maddr="0xd0000"
  659 device          spigot  1
  660 hint.spigot.0.at="isa"
  661 hint.spigot.0.port="0xad6"
  662 hint.spigot.0.irq="15"
  663 hint.spigot.0.maddr="0xee000"
  664 device          apm
  665 hint.apm.0.flags="0x20"
  666 device          pmtimer                 # Adjust system timer at wakeup time
  667 device          gp
  668 hint.gp.0.at="isa"
  669 hint.gp.0.port="0x2c0"
  670 device          gsc     1
  671 hint.gsc.0.at="isa"
  672 hint.gsc.0.port="0x270"
  673 hint.gsc.0.drq="3"
  674 device          dgb     1   
  675 options         NDGBPORTS=17
  676 hint.dgb.0.at="isa"
  677 hint.dgb.0.port="0x220"
  678 hint.dgb.0.maddr="0xfc000"
  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 # the port and irq for tw0 are fictitious
  692 device          tw      1
  693 hint.tw.0.at="isa"
  694 hint.tw.0.port="0x380"
  695 hint.tw.0.irq="11"
  696 device          asc     1
  697 hint.asc.0.at="isa"
  698 hint.asc.0.port="0x3EB"
  699 hint.asc.0.drq="3"
  700 hint.asc.0.irq="10"
  701 device          spic
  702 hint.spic.0.at="isa"
  703 hint.spic.0.port="0x10a0"
  704 device          stl
  705 hint.stl.0.at="isa"
  706 hint.stl.0.port="0x2a0"
  707 hint.stl.0.irq="10"
  708 device          stli
  709 hint.stli.0.at="isa"
  710 hint.stli.0.port="0x2a0"
  711 hint.stli.0.maddr="0xcc000"
  712 hint.stli.0.flags="23"
  713 hint.stli.0.msize="0x1000"
  714 # You are unlikely to have the hardware for loran <phk@FreeBSD.org>
  715 device          loran
  716 hint.loran.0.at="isa"
  717 hint.loran.0.irq="5"
  718 # HOT1 Xilinx 6200 card (http://www.vcc.com/)
  719 device          xrpu
  720 
  721 #
  722 # Laptop/Notebook options:
  723 #
  724 # See also:
  725 #  apm under `Miscellaneous hardware'
  726 # above.
  727 
  728 # For older notebooks that signal a powerfail condition (external
  729 # power supply dropped, or battery state low) by issuing an NMI:
  730 
  731 options         POWERFAIL_NMI   # make it beep instead of panicing
  732 
  733 #
  734 # I2C Bus
  735 #
  736 # Philips i2c bus support is provided by the `iicbus' device.
  737 #
  738 # Supported interfaces:
  739 # pcf   Philips PCF8584 ISA-bus controller
  740 #
  741 device          pcf
  742 hint.pcf.0.at="isa"
  743 hint.pcf.0.port="0x320"
  744 hint.pcf.0.irq="5"
  745 
  746 #---------------------------------------------------------------------------
  747 # ISDN4BSD
  748 #
  749 # See /usr/share/examples/isdn/ROADMAP for an introduction to isdn4bsd.
  750 #
  751 # i4b passive ISDN cards support contains the following hardware drivers:
  752 #
  753 #       isic  - Siemens/Infineon ISDN ISAC/HSCX/IPAC chipset driver
  754 #       iwic  - Winbond W6692 PCI bus ISDN S/T interface controller
  755 #       ifpi  - AVM Fritz!Card PCI driver
  756 #       ifpi2  - AVM Fritz!Card PCI version 2 driver
  757 #       ihfc  - Cologne Chip HFC ISA/ISA-PnP chipset driver
  758 #       ifpnp - AVM Fritz!Card PnP driver 
  759 #       itjc  - Siemens ISAC / TJNet Tiger300/320 chipset
  760 #
  761 # i4b active ISDN cards support contains the following hardware drivers:
  762 #
  763 #       iavc  - AVM B1 PCI, AVM B1 ISA, AVM T1
  764 #
  765 # Note that the ``options'' (if given) and ``device'' lines must BOTH
  766 # be uncommented to enable support for a given card !
  767 #
  768 # In addition to a hardware driver (and probably an option) the mandatory
  769 # ISDN protocol stack devices and the mandatory support device must be 
  770 # enabled as well as one or more devices from the optional devices section.
  771 #
  772 #---------------------------------------------------------------------------
  773 #       isic driver (Siemens/Infineon chipsets)
  774 #
  775 device  isic
  776 #
  777 # ISA bus non-PnP Cards:
  778 # ----------------------
  779 #
  780 # Teles S0/8 or Niccy 1008
  781 options         TEL_S0_8
  782 hint.isic.0.at="isa"
  783 hint.isic.0.maddr="0xd0000"
  784 hint.isic.0.irq="5"
  785 hint.isic.0.flags="1"
  786 #
  787 # Teles S0/16 or Creatix ISDN-S0 or Niccy 1016
  788 options         TEL_S0_16
  789 hint.isic.0.at="isa"
  790 hint.isic.0.port="0xd80"
  791 hint.isic.0.maddr="0xd0000"
  792 hint.isic.0.irq="5"
  793 hint.isic.0.flags="2"
  794 #
  795 # Teles S0/16.3
  796 options         TEL_S0_16_3
  797 hint.isic.0.at="isa"
  798 hint.isic.0.port="0xd80"
  799 hint.isic.0.irq="5"
  800 hint.isic.0.flags="3"
  801 #
  802 # AVM A1 or AVM Fritz!Card
  803 options         AVM_A1
  804 hint.isic.0.at="isa"
  805 hint.isic.0.port="0x340"
  806 hint.isic.0.irq="5"
  807 hint.isic.0.flags="4"
  808 #
  809 # USRobotics Sportster ISDN TA intern
  810 options         USR_STI
  811 hint.isic.0.at="isa"
  812 hint.isic.0.port="0x268"
  813 hint.isic.0.irq="5"
  814 hint.isic.0.flags="7"
  815 #
  816 # ITK ix1 Micro ( < V.3, non-PnP version )
  817 options         ITKIX1
  818 hint.isic.0.at="isa"
  819 hint.isic.0.port="0x398"
  820 hint.isic.0.irq="10"
  821 hint.isic.0.flags="18"
  822 #
  823 # ELSA PCC-16
  824 options         ELSA_PCC16
  825 hint.isic.0.at="isa"
  826 hint.isic.0.port="0x360"
  827 hint.isic.0.irq="10"
  828 hint.isic.0.flags="20"
  829 #
  830 # ISA bus PnP Cards:
  831 # ------------------
  832 #
  833 # Teles S0/16.3 PnP
  834 options         TEL_S0_16_3_P
  835 #
  836 # Creatix ISDN-S0 P&P
  837 options         CRTX_S0_P
  838 #
  839 # Dr. Neuhaus Niccy Go@
  840 options         DRN_NGO
  841 #
  842 # Sedlbauer Win Speed
  843 options         SEDLBAUER
  844 #
  845 # Dynalink IS64PH
  846 options         DYNALINK 
  847 #
  848 # ELSA QuickStep 1000pro ISA
  849 options         ELSA_QS1ISA
  850 #
  851 # Siemens I-Surf 2.0
  852 options         SIEMENS_ISURF2
  853 #
  854 # Asuscom ISDNlink 128K ISA
  855 options         ASUSCOM_IPAC
  856 #
  857 # Eicon Diehl DIVA 2.0 and 2.02
  858 options         EICON_DIVA
  859 #
  860 # Compaq Microcom 610 ISDN card (Compaq series PSB2222I)
  861 options         COMPAQ_M610
  862 #
  863 # PCI bus Cards:
  864 # --------------
  865 #
  866 # Cyclades Cyclom-Y PCI serial driver
  867 device          cy      1
  868 options         CY_PCI_FASTINTR         # Use with cy_pci unless irq is shared
  869 hint.cy.0.at="isa"
  870 hint.cy.0.irq="10"
  871 hint.cy.0.maddr="0xd4000"
  872 hint.cy.0.msize="0x2000"
  873 #
  874 #---------------------------------------------------------------------------
  875 # ELSA MicroLink ISDN/PCI (same as ELSA QuickStep 1000pro PCI)
  876 options         ELSA_QS1PCI
  877 #
  878 #
  879 #---------------------------------------------------------------------------
  880 #       ifpnp driver for AVM Fritz!Card PnP
  881 #
  882 # AVM Fritz!Card PnP
  883 device ifpnp
  884 #
  885 #---------------------------------------------------------------------------
  886 #       ihfc driver for Cologne Chip ISA chipsets (experimental!)
  887 #
  888 # Teles 16.3c ISA PnP
  889 # AcerISDN P10 ISA PnP
  890 # TELEINT ISDN SPEED No.1
  891 device ihfc
  892 #
  893 #---------------------------------------------------------------------------
  894 #       ifpi driver for AVM Fritz!Card PCI
  895 #
  896 # AVM Fritz!Card PCI
  897 device  ifpi
  898 #
  899 #---------------------------------------------------------------------------
  900 #       ifpi2 driver for AVM Fritz!Card PCI version 2
  901 #
  902 # AVM Fritz!Card PCI version 2
  903 device  "ifpi2"
  904 #
  905 #---------------------------------------------------------------------------
  906 #       iwic driver for Winbond W6692 chipset
  907 #
  908 # ASUSCOM P-IN100-ST-D (and other Winbond W6692 based cards)
  909 device  iwic
  910 #
  911 #---------------------------------------------------------------------------
  912 #       itjc driver for Simens ISAC / TJNet Tiger300/320 chipset
  913 #
  914 # Traverse Technologies NETjet-S
  915 # Teles PCI-TJ
  916 device  itjc
  917 #
  918 #---------------------------------------------------------------------------
  919 #       iavc driver (AVM active cards, needs i4bcapi driver!)
  920 #
  921 device  iavc
  922 #
  923 # AVM B1 ISA bus (PnP mode not supported!)
  924 # ----------------------------------------
  925 hint.iavc.0.at="isa"
  926 hint.iavc.0.port="0x150"
  927 hint.iavc.0.irq="5"
  928 #
  929 #---------------------------------------------------------------------------
  930 #       ISDN Protocol Stack - mandatory for all hardware drivers
  931 #
  932 # Q.921 / layer 2 - i4b passive cards D channel handling
  933 device          "i4bq921"
  934 #
  935 # Q.931 / layer 3 - i4b passive cards D channel handling
  936 device          "i4bq931"
  937 #
  938 # layer 4 - i4b common passive and active card handling
  939 device          "i4b"
  940 #
  941 #---------------------------------------------------------------------------
  942 #       ISDN devices - mandatory for all hardware drivers
  943 #
  944 # userland driver to do ISDN tracing (for passive cards only)
  945 device          "i4btrc"        4
  946 #
  947 # userland driver to control the whole thing
  948 device          "i4bctl"
  949 #
  950 #---------------------------------------------------------------------------
  951 #       ISDN devices - optional
  952 #
  953 # userland driver for access to raw B channel
  954 device          "i4brbch"       4
  955 #
  956 # userland driver for telephony
  957 device          "i4btel"        2
  958 #
  959 # network driver for IP over raw HDLC ISDN
  960 device          "i4bipr"        4
  961 # enable VJ header compression detection for ipr i/f
  962 options         IPR_VJ
  963 # enable logging of the first n IP packets to isdnd (n=32 here)
  964 options         IPR_LOG=32
  965 #
  966 # network driver for sync PPP over ISDN; requires an equivalent
  967 # number of sppp device to be configured
  968 device          "i4bisppp"      4
  969 #
  970 # B-channel interface to the netgraph subsystem
  971 device          "i4bing"        2
  972 #
  973 # CAPI driver needed for active ISDN cards (see iavc driver above)
  974 device          "i4bcapi"
  975 #
  976 #---------------------------------------------------------------------------
  977 
  978 #
  979 # Set the number of PV entries per process.  Increasing this can
  980 # stop panics related to heavy use of shared memory. However, that can
  981 # (combined with large amounts of physical memory) cause panics at
  982 # boot time due the kernel running out of VM space.
  983 #
  984 # If you're tweaking this, you might also want to increase the sysctls
  985 # "vm.v_free_min", "vm.v_free_reserved", and "vm.v_free_target".
  986 #
  987 # The value below is the one more than the default.
  988 #
  989 options         PMAP_SHPGPERPROC=201
  990 
  991 #
  992 # Change the size of the kernel virtual address space.  Due to
  993 # constraints in loader(8) on i386, this must be a multiple of 4.
  994 # 256 = 1 GB of kernel address space.  Increasing this also causes
  995 # a reduction of the address space in user processes.  512 splits
  996 # the 4GB cpu address space in half (2GB user, 2GB kernel).
  997 #
  998 options         KVA_PAGES=260
  999 
 1000 
 1001 #####################################################################
 1002 # ABI Emulation
 1003 
 1004 # Enable iBCS2 runtime support for SCO and ISC binaries
 1005 options         IBCS2
 1006 
 1007 # Emulate spx device for client side of SVR3 local X interface
 1008 options         SPX_HACK
 1009 
 1010 # Enable Linux ABI emulation
 1011 options         COMPAT_LINUX
 1012 
 1013 # Enable i386 a.out binary support
 1014 options         COMPAT_AOUT
 1015 
 1016 # Enable the linux-like proc filesystem support (requires COMPAT_LINUX
 1017 # and PSEUDOFS)
 1018 options         LINPROCFS
 1019 
 1020 #
 1021 # SysVR4 ABI emulation
 1022 #
 1023 # The svr4 ABI emulator can be statically compiled into the kernel or loaded as
 1024 # a KLD module.  
 1025 # The STREAMS network emulation code can also be compiled statically or as a 
 1026 # module.  If loaded as a module, it must be loaded before the svr4 module
 1027 # (the /usr/sbin/svr4 script does this for you).  If compiling statically,
 1028 # the `streams' device must be configured into any kernel which also
 1029 # specifies COMPAT_SVR4.  It is possible to have a statically-configured 
 1030 # STREAMS device and a dynamically loadable svr4 emulator;  the /usr/sbin/svr4
 1031 # script understands that it doesn't need to load the `streams' module under
 1032 # those circumstances.
 1033 # Caveat:  At this time, `options KTRACE' is required for the svr4 emulator
 1034 # (whether static or dynamic).  
 1035 # 
 1036 options         COMPAT_SVR4     # build emulator statically
 1037 options         DEBUG_SVR4      # enable verbose debugging
 1038 device          streams         # STREAMS network driver (required for svr4).
 1039 
 1040 
 1041 #####################################################################
 1042 # VM OPTIONS
 1043 
 1044 # Disable the 4 MByte page PSE CPU feature.  The PSE feature allows the
 1045 # kernel to use a 4 MByte pages to map the kernel instead of 4k pages.
 1046 # This saves on the amount of memory needed for page tables needed to
 1047 # map the kernel.  You should only disable this feature as a temporary
 1048 # workaround if you are having problems with it enabled.
 1049 #
 1050 #options        DISABLE_PSE
 1051 
 1052 # Disable the global pages PGE CPU feature.  The PGE feature allows pages
 1053 # to be marked with the PG_G bit.  TLB entries for these pages are not
 1054 # flushed from the cache when %cr3 is reloaded.  This can make context
 1055 # switches less expensive.  You should only disable this feature as a
 1056 # temporary workaround if you are having problems with it enabled.
 1057 #
 1058 #options        DISABLE_PG_G
 1059 
 1060 # KSTACK_PAGES is the number of memory pages to assign to the kernel
 1061 # stack of each thread.
 1062 
 1063 options         KSTACK_PAGES=3
 1064 
 1065 #####################################################################
 1066 
 1067 # More undocumented options for linting.
 1068 # Note that documenting these are not considered an affront.
 1069 
 1070 # PECOFF module (Win32 Execution Format)
 1071 options         PECOFF_SUPPORT
 1072 options         PECOFF_DEBUG
 1073 
 1074 options         ENABLE_ALART
 1075 options         I4B_SMP_WORKAROUND
 1076 options         I586_PMC_GUPROF=0x70000
 1077 options         KBDIO_DEBUG=2
 1078 options         KBD_MAXRETRY=4
 1079 options         KBD_MAXWAIT=6
 1080 options         KBD_RESETDELAY=201
 1081 
 1082 options         PSM_DEBUG=1
 1083 
 1084 options         TIMER_FREQ=((14318182+6)/12)
 1085 
 1086 options         VM_KMEM_SIZE
 1087 options         VM_KMEM_SIZE_MAX
 1088 options         VM_KMEM_SIZE_SCALE
 1089 
 1090 # Yet more undocumented options for linting.
 1091 options         COMPAT_SUNOS

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