The Design and Implementation of the FreeBSD Operating System, Second Edition
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sys/conf/NOTES

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    1 # $FreeBSD: releng/6.4/sys/conf/NOTES 182404 2008-08-28 20:29:33Z emaste $
    2 #
    3 # NOTES -- Lines that can be cut/pasted into kernel and hints configs.
    4 #
    5 # Lines that begin with 'device', 'options', 'machine', 'ident', 'maxusers',
    6 # 'makeoptions', 'hints', etc. go into the kernel configuration that you
    7 # run config(8) with.
    8 #
    9 # Lines that begin with 'hint.' are NOT for config(8), they go into your
   10 # hints file.  See /boot/device.hints and/or the 'hints' config(8) directive.
   11 #
   12 # Please use ``make LINT'' to create an old-style LINT file if you want to
   13 # do kernel test-builds.
   14 #
   15 # This file contains machine independent kernel configuration notes.  For
   16 # machine dependent notes, look in /sys/<arch>/conf/NOTES.
   17 #
   18 
   19 #
   20 # NOTES conventions and style guide:
   21 #
   22 # Large block comments should begin and end with a line containing only a
   23 # comment character.
   24 #
   25 # To describe a particular object, a block comment (if it exists) should
   26 # come first.  Next should come device, options, and hints lines in that
   27 # order.  All device and option lines must be described by a comment that
   28 # doesn't just expand the device or option name.  Use only a concise
   29 # comment on the same line if possible.  Very detailed descriptions of
   30 # devices and subsystems belong in man pages.
   31 #
   32 # A space followed by a tab separates 'options' from an option name.  Two
   33 # spaces followed by a tab separate 'device' from a device name.  Comments
   34 # after an option or device should use one space after the comment character.
   35 # To comment out a negative option that disables code and thus should not be
   36 # enabled for LINT builds, precede 'options' with "#!".
   37 #
   38 
   39 #
   40 # This is the ``identification'' of the kernel.  Usually this should
   41 # be the same as the name of your kernel.
   42 #
   43 ident           LINT
   44 
   45 #
   46 # The `maxusers' parameter controls the static sizing of a number of
   47 # internal system tables by a formula defined in subr_param.c.
   48 # Omitting this parameter or setting it to 0 will cause the system to
   49 # auto-size based on physical memory.
   50 #
   51 maxusers        10
   52 
   53 #
   54 # The `makeoptions' parameter allows variables to be passed to the
   55 # generated Makefile in the build area.
   56 #
   57 # CONF_CFLAGS gives some extra compiler flags that are added to ${CFLAGS}
   58 # after most other flags.  Here we use it to inhibit use of non-optimal
   59 # gcc builtin functions (e.g., memcmp).
   60 #
   61 # DEBUG happens to be magic.
   62 # The following is equivalent to 'config -g KERNELNAME' and creates
   63 # 'kernel.debug' compiled with -g debugging as well as a normal
   64 # 'kernel'.  Use 'make install.debug' to install the debug kernel
   65 # but that isn't normally necessary as the debug symbols are not loaded
   66 # by the kernel and are not useful there anyway.
   67 #
   68 # KERNEL can be overridden so that you can change the default name of your
   69 # kernel.
   70 #
   71 # MODULES_OVERRIDE can be used to limit modules built to a specific list.
   72 #
   73 makeoptions     CONF_CFLAGS=-fno-builtin  #Don't allow use of memcmp, etc.
   74 #makeoptions    DEBUG=-g                #Build kernel with gdb(1) debug symbols
   75 #makeoptions    KERNEL=foo              #Build kernel "foo" and install "/foo"
   76 # Only build Linux API modules and plus those parts of the sound system I need.
   77 #makeoptions    MODULES_OVERRIDE="linux sound/sound sound/driver/maestro3"
   78 makeoptions     DESTDIR=/tmp
   79 
   80 #
   81 # FreeBSD processes are subject to certain limits to their consumption
   82 # of system resources.  See getrlimit(2) for more details.  Each
   83 # resource limit has two values, a "soft" limit and a "hard" limit.
   84 # The soft limits can be modified during normal system operation, but
   85 # the hard limits are set at boot time.  Their default values are
   86 # in sys/<arch>/include/vmparam.h.  There are two ways to change them:
   87 # 
   88 # 1.  Set the values at kernel build time.  The options below are one
   89 #     way to allow that limit to grow to 1GB.  They can be increased
   90 #     further by changing the parameters:
   91 #       
   92 # 2.  In /boot/loader.conf, set the tunables kern.maxswzone,
   93 #     kern.maxbcache, kern.maxtsiz, kern.dfldsiz, kern.maxdsiz,
   94 #     kern.dflssiz, kern.maxssiz and kern.sgrowsiz.
   95 #
   96 # The options in /boot/loader.conf override anything in the kernel
   97 # configuration file.  See the function init_param1 in
   98 # sys/kern/subr_param.c for more details.
   99 #
  100 
  101 options         MAXDSIZ=(1024UL*1024*1024)
  102 options         MAXSSIZ=(128UL*1024*1024)
  103 options         DFLDSIZ=(1024UL*1024*1024)
  104 
  105 #
  106 # BLKDEV_IOSIZE sets the default block size used in user block
  107 # device I/O.  Note that this value will be overridden by the label
  108 # when specifying a block device from a label with a non-0
  109 # partition blocksize.  The default is PAGE_SIZE.
  110 #
  111 options         BLKDEV_IOSIZE=8192
  112 
  113 # Options for the VM subsystem
  114 # L2 cache size (in KB) can be specified in PQ_CACHESIZE
  115 options         PQ_CACHESIZE=512        # color for 512k cache
  116 # Deprecated options supported for backwards compatibility
  117 #options        PQ_NOOPT                # No coloring
  118 #options        PQ_LARGECACHE           # color for 512k cache
  119 #options        PQ_HUGECACHE            # color for 1024k cache
  120 #options        PQ_MEDIUMCACHE          # color for 256k cache
  121 #options        PQ_NORMALCACHE          # color for 64k cache
  122 
  123 # This allows you to actually store this configuration file into
  124 # the kernel binary itself, where it may be later read by saying:
  125 #    strings -n 3 /boot/kernel/kernel | sed -n 's/^___//p' > MYKERNEL
  126 #
  127 options         INCLUDE_CONFIG_FILE     # Include this file in kernel
  128 
  129 options         GEOM_AES                # Don't use, use GEOM_BDE
  130 options         GEOM_APPLE              # Apple partitioning
  131 options         GEOM_BDE                # Disk encryption.
  132 options         GEOM_BSD                # BSD disklabels
  133 options         GEOM_CONCAT             # Disk concatenation.
  134 options         GEOM_ELI                # Disk encryption.
  135 options         GEOM_FOX                # Redundant path mitigation
  136 options         GEOM_GATE               # Userland services.
  137 options         GEOM_GPT                # GPT partitioning
  138 options         GEOM_LABEL              # Providers labelization.
  139 options         GEOM_MBR                # DOS/MBR partitioning
  140 options         GEOM_MIRROR             # Disk mirroring.
  141 options         GEOM_NOP                # Test class.
  142 options         GEOM_PC98               # NEC PC9800 partitioning
  143 options         GEOM_RAID3              # RAID3 functionality.
  144 options         GEOM_SHSEC              # Shared secret.
  145 options         GEOM_STRIPE             # Disk striping.
  146 options         GEOM_SUNLABEL           # Sun/Solaris partitioning
  147 options         GEOM_UZIP               # Read-only compressed disks
  148 options         GEOM_VOL                # Volume names from UFS superblock
  149 options         GEOM_ZERO               # Peformance testing helper.
  150 
  151 #
  152 # The root device and filesystem type can be compiled in;
  153 # this provides a fallback option if the root device cannot
  154 # be correctly guessed by the bootstrap code, or an override if
  155 # the RB_DFLTROOT flag (-r) is specified when booting the kernel.
  156 #
  157 options         ROOTDEVNAME=\"ufs:da0s2e\"
  158 
  159 
  160 #####################################################################
  161 # Scheduler options:
  162 #
  163 # Specifying one of SCHED_4BSD or SCHED_ULE is mandatory.  These options
  164 # select which scheduler is compiled in.
  165 #
  166 # SCHED_4BSD is the historical, proven, BSD scheduler.  It has a global run
  167 # queue and no cpu affinity which makes it suboptimal for SMP.  It has very
  168 # good interactivity and priority selection.
  169 #
  170 # SCHED_ULE is a new scheduler that has been designed for SMP and has some
  171 # advantages for UP as well.  It is intended to replace the 4BSD scheduler
  172 # over time.  NOTE: SCHED_ULE is currently considered experimental and is
  173 # not recommended for production use at this time.
  174 #
  175 options         SCHED_4BSD
  176 #options        SCHED_ULE
  177 
  178 #####################################################################
  179 # SMP OPTIONS:
  180 #
  181 # SMP enables building of a Symmetric MultiProcessor Kernel.
  182 
  183 # Mandatory:
  184 options         SMP                     # Symmetric MultiProcessor Kernel
  185 
  186 # ADAPTIVE_MUTEXES changes the behavior of blocking mutexes to spin
  187 # if the thread that currently owns the mutex is executing on another
  188 # CPU.  This behaviour is enabled by default, so this option can be used
  189 # to disable it.
  190 options         NO_ADAPTIVE_MUTEXES
  191 
  192 # ADAPTIVE_RWLOCKS changes the behavior of reader/writer locks to spin
  193 # if the thread that currently owns the rwlock is executing on another
  194 # CPU.  This behaviour is enabled by default, so this option can be used
  195 # to disable it.
  196 options         NO_ADAPTIVE_RWLOCKS
  197 
  198 
  199 # ADAPTIVE_GIANT causes the Giant lock to also be made adaptive when
  200 # running without NO_ADAPTIVE_MUTEXES.  Normally, because Giant is assumed
  201 # to be held for extended periods, contention on Giant will cause a thread
  202 # to sleep rather than spinning.
  203 options         ADAPTIVE_GIANT
  204 
  205  
  206 # ADAPTIVE_SX changes the behavior of sx locks to spin if the thread
  207 # that currently owns the lock is executing on another CPU.  Note that
  208 # in addition to enabling this option, individual sx locks must be
  209 # initialized with the SX_ADAPTIVESPIN flag.
  210 options   ADAPTIVE_SX
  211 
  212 # MUTEX_NOINLINE forces mutex operations to call functions to perform each
  213 # operation rather than inlining the simple cases.  This can be used to
  214 # shrink the size of the kernel text segment.  Note that this behavior is
  215 # already implied by the INVARIANT_SUPPORT, INVARIANTS, MUTEX_PROFILING,
  216 # and WITNESS options.
  217 options         MUTEX_NOINLINE
  218 
  219 # MUTEX_WAKE_ALL changes the mutex unlock algorithm to wake all waiters
  220 # when a contested mutex is released rather than just awaking the highest
  221 # priority waiter.
  222 options         MUTEX_WAKE_ALL
  223 
  224 # RWLOCK_NOINLINE forces rwlock operations to call functions to perform each
  225 # operation rather than inlining the simple cases.  This can be used to
  226 # shrink the size of the kernel text segment.  Note that this behavior is
  227 # already implied by the INVARIANT_SUPPORT, INVARIANTS, KTR, LOCK_PROFILING,
  228 # and WITNESS options.
  229 options         RWLOCK_NOINLINE
  230 
  231 # SX_NOINLINE forces sx lock operations to call functions to perform each
  232 # operation rather than inlining the simple cases.  This can be used to
  233 # shrink the size of the kernel text segment.  Note that this behavior is
  234 # already implied by the INVARIANT_SUPPORT, INVARIANTS, KTR, LOCK_PROFILING,
  235 # and WITNESS options.
  236 options    SX_NOINLINE
  237 
  238 # SMP Debugging Options:
  239 #
  240 # PREEMPTION allows the threads that are in the kernel to be preempted
  241 #         by higher priority threads.  It helps with interactivity and
  242 #         allows interrupt threads to run sooner rather than waiting.
  243 #         WARNING! Only tested on alpha, amd64, and i386.
  244 # FULL_PREEMPTION instructs the kernel to preempt non-realtime kernel
  245 #         threads.  Its sole use is to expose race conditions and other
  246 #         bugs during development.  Enabling this option will reduce
  247 #         performance and increase the frequency of kernel panics by
  248 #         design.  If you aren't sure that you need it then you don't.
  249 #         Relies on the PREEMPTION option.  DON'T TURN THIS ON.
  250 # MUTEX_DEBUG enables various extra assertions in the mutex code.
  251 # SLEEPQUEUE_PROFILING enables rudimentary profiling of the hash table
  252 #         used to hold active sleep queues.
  253 # TURNSTILE_PROFILING enables rudimentary profiling of the hash table
  254 #         used to hold active lock queues.
  255 # WITNESS enables the witness code which detects deadlocks and cycles
  256 #         during locking operations.
  257 # WITNESS_KDB causes the witness code to drop into the kernel debugger if
  258 #         a lock hierarchy violation occurs or if locks are held when going to
  259 #         sleep.
  260 # WITNESS_SKIPSPIN disables the witness checks on spin mutexes.
  261 options         PREEMPTION
  262 options         FULL_PREEMPTION
  263 options         MUTEX_DEBUG
  264 options         WITNESS
  265 options         WITNESS_KDB
  266 options         WITNESS_SKIPSPIN
  267 
  268 # MUTEX_PROFILING - Profiling mutual exclusion locks (mutexes).  See
  269 # MUTEX_PROFILING(9) for details.
  270 options         MUTEX_PROFILING
  271 # Set the number of buffers and the hash size.  The hash size MUST be larger
  272 # than the number of buffers.  Hash size should be prime.
  273 options         MPROF_BUFFERS="1536"
  274 options         MPROF_HASH_SIZE="1543"
  275 
  276 # Profiling for internal hash tables.
  277 options         SLEEPQUEUE_PROFILING
  278 options         TURNSTILE_PROFILING
  279 
  280 
  281 #####################################################################
  282 # COMPATIBILITY OPTIONS
  283 
  284 #
  285 # Implement system calls compatible with 4.3BSD and older versions of
  286 # FreeBSD.  You probably do NOT want to remove this as much current code
  287 # still relies on the 4.3 emulation.  Note that some architectures that
  288 # are supported by FreeBSD do not include support for certain important
  289 # aspects of this compatibility option, namely those related to the
  290 # signal delivery mechanism.
  291 #
  292 options         COMPAT_43
  293 
  294 # Enable FreeBSD4 compatibility syscalls
  295 options         COMPAT_FREEBSD4
  296 
  297 # Enable FreeBSD5 compatibility syscalls
  298 options         COMPAT_FREEBSD5
  299 
  300 #
  301 # These three options provide support for System V Interface
  302 # Definition-style interprocess communication, in the form of shared
  303 # memory, semaphores, and message queues, respectively.
  304 #
  305 options         SYSVSHM
  306 options         SYSVSEM
  307 options         SYSVMSG
  308 
  309 
  310 #####################################################################
  311 # DEBUGGING OPTIONS
  312 
  313 #
  314 # Compile with kernel debugger related code.
  315 #
  316 options         KDB
  317 
  318 #
  319 # Print a stack trace of the current thread on the console for a panic.
  320 #
  321 options         KDB_TRACE
  322 
  323 #
  324 # Don't enter the debugger for a panic. Intended for unattended operation
  325 # where you may want to enter the debugger from the console, but still want
  326 # the machine to recover from a panic.
  327 #
  328 options         KDB_UNATTENDED
  329 
  330 #
  331 # Enable the ddb debugger backend.
  332 #
  333 options         DDB
  334 
  335 #
  336 # Print the numerical value of symbols in addition to the symbolic
  337 # representation.
  338 #
  339 options         DDB_NUMSYM
  340 
  341 #
  342 # Enable the remote gdb debugger backend.
  343 #
  344 options         GDB
  345 
  346 #
  347 # SYSCTL_DEBUG enables a 'sysctl' debug tree that can be used to dump the
  348 # contents of the registered sysctl nodes on the console.  It is disabled by
  349 # default because it generates excessively verbose consol output that can
  350 # interfere with serial console operation.
  351 #
  352 options         SYSCTL_DEBUG
  353 
  354 #
  355 # DEBUG_MEMGUARD builds and enables memguard(9), a replacement allocator
  356 # for the kernel used to detect modify-after-free scenarios.  See the
  357 # memguard(9) man page for more information on usage.
  358 #
  359 options         DEBUG_MEMGUARD
  360 
  361 #
  362 # DEBUG_REDZONE enables buffer underflows and buffer overflows detection for
  363 # malloc(9).
  364 #
  365 options         DEBUG_REDZONE
  366 
  367 #
  368 # KTRACE enables the system-call tracing facility ktrace(2).  To be more
  369 # SMP-friendly, KTRACE uses a worker thread to process most trace events
  370 # asynchronously to the thread generating the event.  This requires a
  371 # pre-allocated store of objects representing trace events.  The
  372 # KTRACE_REQUEST_POOL option specifies the initial size of this store.
  373 # The size of the pool can be adjusted both at boottime and runtime via
  374 # the kern.ktrace_request_pool tunable and sysctl.
  375 #
  376 options         KTRACE                  #kernel tracing
  377 options         KTRACE_REQUEST_POOL=101
  378 
  379 #
  380 # KTR is a kernel tracing mechanism imported from BSD/OS.  Currently
  381 # it has no userland interface aside from a few sysctl's.  It is
  382 # enabled with the KTR option.  KTR_ENTRIES defines the number of
  383 # entries in the circular trace buffer; it must be a power of two.
  384 # KTR_COMPILE defines the mask of events to compile into the kernel as
  385 # defined by the KTR_* constants in <sys/ktr.h>.  KTR_MASK defines the
  386 # initial value of the ktr_mask variable which determines at runtime
  387 # what events to trace.  KTR_CPUMASK determines which CPU's log
  388 # events, with bit X corresponding to cpu X.  KTR_VERBOSE enables
  389 # dumping of KTR events to the console by default.  This functionality
  390 # can be toggled via the debug.ktr_verbose sysctl and defaults to off
  391 # if KTR_VERBOSE is not defined.
  392 #
  393 options         KTR
  394 options         KTR_ENTRIES=1024
  395 options         KTR_COMPILE=(KTR_INTR|KTR_PROC)
  396 options         KTR_MASK=KTR_INTR
  397 options         KTR_CPUMASK=0x3
  398 options         KTR_VERBOSE
  399 
  400 #
  401 # ALQ(9) is a facilty for the asynchronous queuing of records from the kernel
  402 # to a vnode, and is employed by services such as KTR(4) to produce trace
  403 # files based on a kernel event stream.  Records are written asynchronously
  404 # in a worker thread.
  405 #
  406 options         ALQ
  407 options         KTR_ALQ
  408 
  409 #
  410 # Print information on which SYSINIT mi_startup() is up to.  If DDB is
  411 # enabled, DDB will be used to look up the name of the function and print
  412 # that instead of the function pointer.
  413 #
  414 options         VERBOSE_SYSINIT
  415 
  416 #
  417 # The INVARIANTS option is used in a number of source files to enable
  418 # extra sanity checking of internal structures.  This support is not
  419 # enabled by default because of the extra time it would take to check
  420 # for these conditions, which can only occur as a result of
  421 # programming errors.
  422 #
  423 options         INVARIANTS
  424 
  425 #
  426 # The INVARIANT_SUPPORT option makes us compile in support for
  427 # verifying some of the internal structures.  It is a prerequisite for
  428 # 'INVARIANTS', as enabling 'INVARIANTS' will make these functions be
  429 # called.  The intent is that you can set 'INVARIANTS' for single
  430 # source files (by changing the source file or specifying it on the
  431 # command line) if you have 'INVARIANT_SUPPORT' enabled.  Also, if you
  432 # wish to build a kernel module with 'INVARIANTS', then adding
  433 # 'INVARIANT_SUPPORT' to your kernel will provide all the necessary
  434 # infrastructure without the added overhead.
  435 #
  436 options         INVARIANT_SUPPORT
  437 
  438 #
  439 # The DIAGNOSTIC option is used to enable extra debugging information
  440 # from some parts of the kernel.  As this makes everything more noisy,
  441 # it is disabled by default.
  442 #
  443 options         DIAGNOSTIC
  444 
  445 #
  446 # REGRESSION causes optional kernel interfaces necessary only for regression
  447 # testing to be enabled.  These interfaces may constitute security risks
  448 # when enabled, as they permit processes to easily modify aspects of the
  449 # run-time environment to reproduce unlikely or unusual (possibly normally
  450 # impossible) scenarios.
  451 #
  452 options         REGRESSION
  453 
  454 #
  455 # RESTARTABLE_PANICS allows one to continue from a panic as if it were
  456 # a call to the debugger via the Debugger() function instead.  It is only
  457 # useful if a kernel debugger is present.  To restart from a panic, reset
  458 # the panicstr variable to NULL and continue execution.  This option is
  459 # for development use only and should NOT be used in production systems
  460 # to "workaround" a panic.
  461 #
  462 #options        RESTARTABLE_PANICS
  463 
  464 #
  465 # This option let some drivers co-exist that can't co-exist in a running
  466 # system.  This is used to be able to compile all kernel code in one go for
  467 # quality assurance purposes (like this file, which the option takes it name
  468 # from.)
  469 #
  470 options         COMPILING_LINT
  471 
  472 
  473 #####################################################################
  474 # PERFORMANCE MONITORING OPTIONS
  475 
  476 #
  477 # The hwpmc driver that allows the use of in-CPU performance monitoring
  478 # counters for performance monitoring.  The base kernel needs to configured
  479 # with the 'options' line, while the hwpmc device can be either compiled
  480 # in or loaded as a loadable kernel module.
  481 #
  482 # Additional configuration options may be required on specific architectures,
  483 # please see hwpmc(4).
  484 #
  485 device          hwpmc                   # Driver (also a loadable module)
  486 options         HWPMC_HOOKS             # Other necessary kernel hooks
  487 
  488 
  489 #####################################################################
  490 # NETWORKING OPTIONS
  491 
  492 #
  493 # Protocol families:
  494 #  Only the INET (Internet) family is officially supported in FreeBSD.
  495 #
  496 options         INET                    #Internet communications protocols
  497 options         INET6                   #IPv6 communications protocols
  498 options         IPSEC                   #IP security
  499 options         IPSEC_ESP               #IP security (crypto; define w/ IPSEC)
  500 options         IPSEC_DEBUG             #debug for IP security
  501 #
  502 # Set IPSEC_FILTERGIF to force packets coming through a gif tunnel
  503 # to be processed by any configured packet filtering (ipfw, ipf).
  504 # The default is that packets coming from a tunnel are _not_ processed;
  505 # they are assumed trusted.
  506 #
  507 # IPSEC history is preserved for such packets, and can be filtered
  508 # using ipfw(8)'s 'ipsec' keyword, when this option is enabled.
  509 #
  510 #options        IPSEC_FILTERGIF         #filter ipsec packets from a tunnel
  511 
  512 #options        FAST_IPSEC              #new IPsec (cannot define w/ IPSEC)
  513 
  514 options         IPX                     #IPX/SPX communications protocols
  515 options         IPXIP                   #IPX in IP encapsulation (not available)
  516 
  517 options         NCP                     #NetWare Core protocol
  518 
  519 options         NETATALK                #Appletalk communications protocols
  520 options         NETATALKDEBUG           #Appletalk debugging
  521 
  522 #
  523 # SMB/CIFS requester
  524 # NETSMB enables support for SMB protocol, it requires LIBMCHAIN and LIBICONV
  525 # options.
  526 options         NETSMB                  #SMB/CIFS requester
  527 
  528 # mchain library. It can be either loaded as KLD or compiled into kernel
  529 options         LIBMCHAIN
  530 
  531 # libalias library, performing NAT
  532 options         LIBALIAS
  533 
  534 # altq(9). Enable the base part of the hooks with the ALTQ option.
  535 # Individual disciplines must be built into the base system and can not be
  536 # loaded as modules at this point. In order to build a SMP kernel you must
  537 # also have the ALTQ_NOPCC option.
  538 options         ALTQ
  539 options         ALTQ_CBQ        # Class Bases Queueing
  540 options         ALTQ_RED        # Random Early Detection
  541 options         ALTQ_RIO        # RED In/Out
  542 options         ALTQ_HFSC       # Hierarchical Packet Scheduler
  543 options         ALTQ_CDNR       # Traffic conditioner
  544 options         ALTQ_PRIQ       # Priority Queueing
  545 options         ALTQ_NOPCC      # Required for SMP build
  546 options         ALTQ_DEBUG
  547 
  548 # netgraph(4). Enable the base netgraph code with the NETGRAPH option.
  549 # Individual node types can be enabled with the corresponding option
  550 # listed below; however, this is not strictly necessary as netgraph
  551 # will automatically load the corresponding KLD module if the node type
  552 # is not already compiled into the kernel. Each type below has a
  553 # corresponding man page, e.g., ng_async(8).
  554 options         NETGRAPH                # netgraph(4) system
  555 options         NETGRAPH_DEBUG          # enable extra debugging, this
  556                                         # affects netgraph(4) and nodes
  557 # Node types
  558 options         NETGRAPH_ASYNC
  559 options         NETGRAPH_ATMLLC
  560 options         NETGRAPH_ATM_ATMPIF
  561 options         NETGRAPH_BLUETOOTH              # ng_bluetooth(4)
  562 options         NETGRAPH_BLUETOOTH_BT3C         # ng_bt3c(4)
  563 options         NETGRAPH_BLUETOOTH_H4           # ng_h4(4)
  564 options         NETGRAPH_BLUETOOTH_HCI          # ng_hci(4)
  565 options         NETGRAPH_BLUETOOTH_L2CAP        # ng_l2cap(4)
  566 options         NETGRAPH_BLUETOOTH_SOCKET       # ng_btsocket(4)
  567 options         NETGRAPH_BLUETOOTH_UBT          # ng_ubt(4)
  568 options         NETGRAPH_BLUETOOTH_UBTBCMFW     # ubtbcmfw(4)
  569 options         NETGRAPH_BPF
  570 options         NETGRAPH_BRIDGE
  571 options         NETGRAPH_CISCO
  572 options         NETGRAPH_DEFLATE
  573 options         NETGRAPH_DEVICE
  574 options         NETGRAPH_ECHO
  575 options         NETGRAPH_EIFACE
  576 options         NETGRAPH_ETHER
  577 options         NETGRAPH_FEC
  578 options         NETGRAPH_FRAME_RELAY
  579 options         NETGRAPH_GIF
  580 options         NETGRAPH_GIF_DEMUX
  581 options         NETGRAPH_HOLE
  582 options         NETGRAPH_IFACE
  583 options         NETGRAPH_IP_INPUT
  584 options         NETGRAPH_IPFW
  585 options         NETGRAPH_KSOCKET
  586 options         NETGRAPH_L2TP
  587 options         NETGRAPH_LMI
  588 # MPPC compression requires proprietary files (not included)
  589 #options        NETGRAPH_MPPC_COMPRESSION
  590 options         NETGRAPH_MPPC_ENCRYPTION
  591 options         NETGRAPH_NETFLOW
  592 options         NETGRAPH_NAT
  593 options         NETGRAPH_ONE2MANY
  594 options         NETGRAPH_PPP
  595 options         NETGRAPH_PPPOE
  596 options         NETGRAPH_PPTPGRE
  597 options         NETGRAPH_PRED1
  598 options         NETGRAPH_RFC1490
  599 options         NETGRAPH_SOCKET
  600 options         NETGRAPH_SPLIT
  601 options         NETGRAPH_SPPP
  602 options         NETGRAPH_TAG
  603 options         NETGRAPH_TCPMSS
  604 options         NETGRAPH_TEE
  605 options         NETGRAPH_TTY
  606 options         NETGRAPH_UI
  607 options         NETGRAPH_VJC
  608 
  609 # NgATM - Netgraph ATM
  610 options         NGATM_ATM
  611 options         NGATM_ATMBASE
  612 options         NGATM_SSCOP
  613 options         NGATM_SSCFU
  614 options         NGATM_UNI
  615 options         NGATM_CCATM
  616 
  617 device          mn      # Munich32x/Falc54 Nx64kbit/sec cards.
  618 
  619 #
  620 # Network interfaces:
  621 #  The `loop' device is MANDATORY when networking is enabled.
  622 #  The `ether' device provides generic code to handle
  623 #  Ethernets; it is MANDATORY when an Ethernet device driver is
  624 #  configured or token-ring is enabled.
  625 #  The `vlan' device implements the VLAN tagging of Ethernet frames
  626 #  according to IEEE 802.1Q.  It requires `device miibus'.
  627 #  The `wlan' device provides generic code to support 802.11
  628 #  drivers, including host AP mode; it is MANDATORY for the wi,
  629 #  ath, and awi drivers and will eventually be required by all 802.11 drivers.
  630 #  The `wlan_wep', `wlan_tkip', and `wlan_ccmp' devices provide
  631 #  support for WEP, TKIP, and AES-CCMP crypto protocols optionally
  632 #  used with 802.11 devices that depend on the `wlan' module.
  633 #  The `wlan_xauth' device provides support for external (i.e. user-mode)
  634 #  authenticators for use with 802.11 drivers that use the `wlan'
  635 #  module and support 802.1x and/or WPA security protocols.
  636 #  The `wlan_acl' device provides a MAC-based access control mechanism
  637 #  for use with 802.11 drivers operating in ap mode and using the
  638 #  `wlan' module.
  639 #  The `fddi' device provides generic code to support FDDI.
  640 #  The `arcnet' device provides generic code to support Arcnet.
  641 #  The `sppp' device serves a similar role for certain types
  642 #  of synchronous PPP links (like `cx', `ar').
  643 #  The `sl' device implements the Serial Line IP (SLIP) service.
  644 #  The `ppp' device implements the Point-to-Point Protocol.
  645 #  The `bpf' device enables the Berkeley Packet Filter.  Be
  646 #  aware of the legal and administrative consequences of enabling this
  647 #  option.  The number of devices determines the maximum number of
  648 #  simultaneous BPF clients programs runnable.  DHCP requires bpf.
  649 #  The `disc' device implements a minimal network interface,
  650 #  which throws away all packets sent and never receives any.  It is
  651 #  included for testing and benchmarking purposes.
  652 #  The `edsc' device implements a minimal Ethernet interface,
  653 #  which discards all packets sent and receives none.
  654 #  The `tap' device is a pty-like virtual Ethernet interface
  655 #  The `tun' device implements (user-)ppp and nos-tun
  656 #  The `gif' device implements IPv6 over IP4 tunneling,
  657 #  IPv4 over IPv6 tunneling, IPv4 over IPv4 tunneling and
  658 #  IPv6 over IPv6 tunneling.
  659 #  The `gre' device implements two types of IP4 over IP4 tunneling:
  660 #  GRE and MOBILE, as specified in the RFC1701 and RFC2004.
  661 #  The XBONEHACK option allows the same pair of addresses to be configured on
  662 #  multiple gif interfaces.
  663 #  The `faith' device captures packets sent to it and diverts them
  664 #  to the IPv4/IPv6 translation daemon.
  665 #  The `stf' device implements 6to4 encapsulation.
  666 #  The `ef' device provides support for multiple ethernet frame types
  667 #  specified via ETHER_* options. See ef(4) for details.
  668 #
  669 # The pf packet filter consists of three devices:
  670 #  The `pf' device provides /dev/pf and the firewall code itself.
  671 #  The `pflog' device provides the pflog0 interface which logs packets.
  672 #  The `pfsync' device provides the pfsync0 interface used for
  673 #   synchronization of firewall state tables (over the net).
  674 #
  675 # The PPP_BSDCOMP option enables support for compress(1) style entire
  676 # packet compression, the PPP_DEFLATE is for zlib/gzip style compression.
  677 # PPP_FILTER enables code for filtering the ppp data stream and selecting
  678 # events for resetting the demand dial activity timer - requires bpf.
  679 # See pppd(8) for more details.
  680 #
  681 device          ether                   #Generic Ethernet
  682 device          vlan                    #VLAN support (needs miibus)
  683 device          wlan                    #802.11 support
  684 device          wlan_wep                #802.11 WEP support
  685 device          wlan_ccmp               #802.11 CCMP support
  686 device          wlan_tkip               #802.11 TKIP support
  687 device          wlan_xauth              #802.11 external authenticator support
  688 device          wlan_acl                #802.11 MAC ACL support
  689 device          token                   #Generic TokenRing
  690 device          fddi                    #Generic FDDI
  691 device          arcnet                  #Generic Arcnet
  692 device          sppp                    #Generic Synchronous PPP
  693 device          loop                    #Network loopback device
  694 device          bpf                     #Berkeley packet filter
  695 device          disc                    #Discard device based on loopback
  696 device          edsc                    #Ethernet discard device
  697 device          tap                     #Virtual Ethernet driver
  698 device          tun                     #Tunnel driver (ppp(8), nos-tun(8))
  699 device          sl                      #Serial Line IP
  700 device          gre                     #IP over IP tunneling
  701 device          if_bridge               #Bridge interface
  702 device          pf                      #PF OpenBSD packet-filter firewall
  703 device          pflog                   #logging support interface for PF
  704 device          pfsync                  #synchronization interface for PF
  705 device          carp                    #Common Address Redundancy Protocol
  706 device          ppp                     #Point-to-point protocol
  707 options         PPP_BSDCOMP             #PPP BSD-compress support
  708 options         PPP_DEFLATE             #PPP zlib/deflate/gzip support
  709 options         PPP_FILTER              #enable bpf filtering (needs bpf)
  710 device          lagg                    #Link aggregation interface
  711 
  712 device          ef                      # Multiple ethernet frames support
  713 options         ETHER_II                # enable Ethernet_II frame
  714 options         ETHER_8023              # enable Ethernet_802.3 (Novell) frame
  715 options         ETHER_8022              # enable Ethernet_802.2 frame
  716 options         ETHER_SNAP              # enable Ethernet_802.2/SNAP frame
  717 
  718 # for IPv6
  719 device          gif                     #IPv6 and IPv4 tunneling
  720 options         XBONEHACK
  721 device          faith                   #for IPv6 and IPv4 translation
  722 device          stf                     #6to4 IPv6 over IPv4 encapsulation
  723 
  724 #
  725 # Internet family options:
  726 #
  727 # MROUTING enables the kernel multicast packet forwarder, which works
  728 # with mrouted(8).
  729 #
  730 # PIM enables Protocol Independent Multicast in the kernel.
  731 # Requires MROUTING enabled.
  732 #
  733 # IPFIREWALL enables support for IP firewall construction, in
  734 # conjunction with the `ipfw' program.  IPFIREWALL_VERBOSE sends
  735 # logged packets to the system logger.  IPFIREWALL_VERBOSE_LIMIT
  736 # limits the number of times a matching entry can be logged.
  737 #
  738 # WARNING:  IPFIREWALL defaults to a policy of "deny ip from any to any"
  739 # and if you do not add other rules during startup to allow access,
  740 # YOU WILL LOCK YOURSELF OUT.  It is suggested that you set firewall_type=open
  741 # in /etc/rc.conf when first enabling this feature, then refining the
  742 # firewall rules in /etc/rc.firewall after you've tested that the new kernel
  743 # feature works properly.
  744 #
  745 # IPFIREWALL_DEFAULT_TO_ACCEPT causes the default rule (at boot) to
  746 # allow everything.  Use with care, if a cracker can crash your
  747 # firewall machine, they can get to your protected machines.  However,
  748 # if you are using it as an as-needed filter for specific problems as
  749 # they arise, then this may be for you.  Changing the default to 'allow'
  750 # means that you won't get stuck if the kernel and /sbin/ipfw binary get
  751 # out of sync.
  752 #
  753 # IPDIVERT enables the divert IP sockets, used by ``ipfw divert''.  It
  754 # depends on IPFIREWALL if compiled into the kernel.
  755 #
  756 # IPFIREWALL_FORWARD enables changing of the packet destination either
  757 # to do some sort of policy routing or transparent proxying.  Used by
  758 # ``ipfw forward''. All  redirections apply to locally generated
  759 # packets too.  Because of this great care is required when
  760 # crafting the ruleset.
  761 #
  762 # IPSTEALTH enables code to support stealth forwarding (i.e., forwarding
  763 # packets without touching the ttl).  This can be useful to hide firewalls
  764 # from traceroute and similar tools.
  765 #
  766 # TCPDEBUG enables code which keeps traces of the TCP state machine
  767 # for sockets with the SO_DEBUG option set, which can then be examined
  768 # using the trpt(8) utility.
  769 #
  770 options         MROUTING                # Multicast routing
  771 options         PIM                     # Protocol Independent Multicast
  772 options         IPFIREWALL              #firewall
  773 options         IPFIREWALL_VERBOSE      #enable logging to syslogd(8)
  774 options         IPFIREWALL_VERBOSE_LIMIT=100    #limit verbosity
  775 options         IPFIREWALL_DEFAULT_TO_ACCEPT    #allow everything by default
  776 options         IPFIREWALL_FORWARD      #packet destination changes
  777 options         IPV6FIREWALL            #firewall for IPv6
  778 options         IPV6FIREWALL_VERBOSE
  779 options         IPV6FIREWALL_VERBOSE_LIMIT=100
  780 options         IPV6FIREWALL_DEFAULT_TO_ACCEPT
  781 options         IPDIVERT                #divert sockets
  782 options         IPFILTER                #ipfilter support
  783 options         IPFILTER_LOG            #ipfilter logging
  784 options         IPFILTER_LOOKUP         #ipfilter pools
  785 options         IPFILTER_DEFAULT_BLOCK  #block all packets by default
  786 options         IPSTEALTH               #support for stealth forwarding
  787 options         TCPDEBUG
  788 
  789 # The MBUF_STRESS_TEST option enables options which create
  790 # various random failures / extreme cases related to mbuf
  791 # functions.  See mbuf(9) for a list of available test cases.
  792 options         MBUF_STRESS_TEST
  793 
  794 # Statically Link in accept filters
  795 options         ACCEPT_FILTER_DATA
  796 options         ACCEPT_FILTER_HTTP
  797 
  798 # TCP_DROP_SYNFIN adds support for ignoring TCP packets with SYN+FIN. This
  799 # prevents nmap et al. from identifying the TCP/IP stack, but breaks support
  800 # for RFC1644 extensions and is not recommended for web servers.
  801 #
  802 options         TCP_DROP_SYNFIN         #drop TCP packets with SYN+FIN
  803 
  804 # TCP_SIGNATURE adds support for RFC 2385 (TCP-MD5) digests. These are
  805 # carried in TCP option 19. This option is commonly used to protect
  806 # TCP sessions (e.g. BGP) where IPSEC is not available nor desirable.
  807 # This is enabled on a per-socket basis using the TCP_MD5SIG socket option.
  808 # This requires the use of 'device crypto', 'options FAST_IPSEC' or 'options
  809 # IPSEC', and 'device cryptodev'.
  810 #options        TCP_SIGNATURE           #include support for RFC 2385
  811 
  812 # DUMMYNET enables the "dummynet" bandwidth limiter.  You need IPFIREWALL
  813 # as well.  See dummynet(4) and ipfw(8) for more info.  When you run
  814 # DUMMYNET it is advisable to also have at least "options HZ=1000" to achieve
  815 # a smooth scheduling of the traffic.
  816 #
  817 options         DUMMYNET
  818 
  819 # BRIDGE enables bridging between ethernet cards -- see bridge(4).
  820 # You can use IPFIREWALL and DUMMYNET together with bridging.
  821 # NOTE: This option is deprecated and will be removed in the future.
  822 #       See if_bridge(4) for an alternative.
  823 #
  824 options         BRIDGE
  825 
  826 # Zero copy sockets support.  This enables "zero copy" for sending and
  827 # receiving data via a socket.  The send side works for any type of NIC,
  828 # the receive side only works for NICs that support MTUs greater than the
  829 # page size of your architecture and that support header splitting.  See
  830 # zero_copy(9) for more details.
  831 options         ZERO_COPY_SOCKETS
  832 
  833 #
  834 # ATM (HARP version) options
  835 #
  836 # ATM_CORE includes the base ATM functionality code.  This must be included
  837 #       for ATM support.
  838 #
  839 # ATM_IP includes support for running IP over ATM.
  840 #
  841 # At least one (and usually only one) of the following signalling managers
  842 # must be included (note that all signalling managers include PVC support):
  843 # ATM_SIGPVC includes support for the PVC-only signalling manager `sigpvc'.
  844 # ATM_SPANS includes support for the `spans' signalling manager, which runs
  845 #       the FORE Systems's proprietary SPANS signalling protocol.
  846 # ATM_UNI includes support for the `uni30' and `uni31' signalling managers,
  847 #       which run the ATM Forum UNI 3.x signalling protocols.
  848 #
  849 # The `hfa' driver provides support for the FORE Systems, Inc.
  850 # PCA-200E ATM PCI Adapter.
  851 #
  852 # The `harp' pseudo-driver makes all NATM interface drivers available to HARP.
  853 #
  854 options         ATM_CORE                #core ATM protocol family
  855 options         ATM_IP                  #IP over ATM support
  856 options         ATM_SIGPVC              #SIGPVC signalling manager
  857 options         ATM_SPANS               #SPANS signalling manager
  858 options         ATM_UNI                 #UNI signalling manager
  859 
  860 device          hfa                     #FORE PCA-200E ATM PCI
  861 device          harp                    #Pseudo-interface for NATM
  862 
  863 
  864 #####################################################################
  865 # FILESYSTEM OPTIONS
  866 
  867 #
  868 # Only the root, /usr, and /tmp filesystems need be statically
  869 # compiled; everything else will be automatically loaded at mount
  870 # time.  (Exception: the UFS family--- FFS --- cannot
  871 # currently be demand-loaded.)  Some people still prefer to statically
  872 # compile other filesystems as well.
  873 #
  874 # NB: The PORTAL, UMAP and UNION filesystems are known to be buggy, and
  875 # WILL panic your system if you attempt to do anything with them.  They
  876 # are included here as an incentive for some enterprising soul to sit
  877 # down and fix them.
  878 #
  879 
  880 # One of these is mandatory:
  881 options         FFS                     #Fast filesystem
  882 options         NFSCLIENT               #Network File System client
  883 
  884 # The rest are optional:
  885 options         CD9660                  #ISO 9660 filesystem
  886 options         FDESCFS                 #File descriptor filesystem
  887 options         HPFS                    #OS/2 File system
  888 options         MSDOSFS                 #MS DOS File System (FAT, FAT32)
  889 options         NFSSERVER               #Network File System server
  890 # XXX don't build NFSLOCKD since it conflicts with ATM_SPANS
  891 #options        NFSLOCKD                #Network Lock Manager
  892 options         NTFS                    #NT File System
  893 options         NULLFS                  #NULL filesystem
  894 # Broken (depends on NCP):
  895 #options        NWFS                    #NetWare filesystem
  896 options         PORTALFS                #Portal filesystem
  897 options         PROCFS                  #Process filesystem (requires PSEUDOFS)
  898 options         PSEUDOFS                #Pseudo-filesystem framework
  899 options         PSEUDOFS_TRACE          #Debugging support for PSEUDOFS
  900 options         SMBFS                   #SMB/CIFS filesystem
  901 options         UDF                     #Universal Disk Format
  902 # Broken (seriously (functionally) broken):
  903 #options        UMAPFS                  #UID map filesystem
  904 options         UNIONFS                 #Union filesystem
  905 # The xFS_ROOT options REQUIRE the associated ``options xFS''
  906 options         NFS_ROOT                #NFS usable as root device
  907 
  908 # Soft updates is a technique for improving filesystem speed and
  909 # making abrupt shutdown less risky.
  910 #
  911 options         SOFTUPDATES
  912 
  913 # Extended attributes allow additional data to be associated with files,
  914 # and is used for ACLs, Capabilities, and MAC labels.
  915 # See src/sys/ufs/ufs/README.extattr for more information.
  916 options         UFS_EXTATTR
  917 options         UFS_EXTATTR_AUTOSTART
  918 
  919 # Access Control List support for UFS filesystems.  The current ACL
  920 # implementation requires extended attribute support, UFS_EXTATTR,
  921 # for the underlying filesystem.
  922 # See src/sys/ufs/ufs/README.acls for more information.
  923 options         UFS_ACL
  924 
  925 # Directory hashing improves the speed of operations on very large
  926 # directories at the expense of some memory.
  927 options         UFS_DIRHASH
  928 
  929 # Make space in the kernel for a root filesystem on a md device.
  930 # Define to the number of kilobytes to reserve for the filesystem.
  931 options         MD_ROOT_SIZE=10
  932 
  933 # Make the md device a potential root device, either with preloaded
  934 # images of type mfs_root or md_root.
  935 options         MD_ROOT
  936 
  937 # Disk quotas are supported when this option is enabled.
  938 options         QUOTA                   #enable disk quotas
  939 
  940 # If you are running a machine just as a fileserver for PC and MAC
  941 # users, using SAMBA or Netatalk, you may consider setting this option
  942 # and keeping all those users' directories on a filesystem that is
  943 # mounted with the suiddir option. This gives new files the same
  944 # ownership as the directory (similar to group). It's a security hole
  945 # if you let these users run programs, so confine it to file-servers
  946 # (but it'll save you lots of headaches in those cases). Root owned
  947 # directories are exempt and X bits are cleared. The suid bit must be
  948 # set on the directory as well; see chmod(1) PC owners can't see/set
  949 # ownerships so they keep getting their toes trodden on. This saves
  950 # you all the support calls as the filesystem it's used on will act as
  951 # they expect: "It's my dir so it must be my file".
  952 #
  953 options         SUIDDIR
  954 
  955 # NFS options:
  956 options         NFS_MINATTRTIMO=3       # VREG attrib cache timeout in sec
  957 options         NFS_MAXATTRTIMO=60
  958 options         NFS_MINDIRATTRTIMO=30   # VDIR attrib cache timeout in sec
  959 options         NFS_MAXDIRATTRTIMO=60
  960 options         NFS_GATHERDELAY=10      # Default write gather delay (msec)
  961 options         NFS_WDELAYHASHSIZ=16    # and with this
  962 options         NFS_DEBUG               # Enable NFS Debugging
  963 
  964 # Coda stuff:
  965 options         CODA                    #CODA filesystem.
  966 device          vcoda                   #coda minicache <-> venus comm.
  967 # Use the old Coda 5.x venus<->kernel interface instead of the new
  968 # realms-aware 6.x protocol.
  969 #options        CODA_COMPAT_5
  970 
  971 #
  972 # Add support for the EXT2FS filesystem of Linux fame.  Be a bit
  973 # careful with this - the ext2fs code has a tendency to lag behind
  974 # changes and not be exercised very much, so mounting read/write could
  975 # be dangerous (and even mounting read only could result in panics.)
  976 #
  977 options         EXT2FS
  978 
  979 #
  980 # Add support for the ReiserFS filesystem (used in Linux). Currently,
  981 # this is limited to read-only access.
  982 #
  983 options         REISERFS
  984 
  985 # Use real implementations of the aio_* system calls.  There are numerous
  986 # stability and security issues in the current aio code that make it
  987 # unsuitable for inclusion on machines with untrusted local users.
  988 options         VFS_AIO
  989 
  990 # Cryptographically secure random number generator; /dev/random
  991 device          random
  992 
  993 # The system memory devices; /dev/mem, /dev/kmem
  994 device          mem
  995 
  996 # Optional character code conversion support with LIBICONV.
  997 # Each option requires their base file system and LIBICONV.
  998 options         CD9660_ICONV
  999 options         MSDOSFS_ICONV
 1000 options         NTFS_ICONV
 1001 options         UDF_ICONV
 1002 
 1003 
 1004 #####################################################################
 1005 # POSIX P1003.1B
 1006 
 1007 # Real time extensions added in the 1993 Posix
 1008 # _KPOSIX_PRIORITY_SCHEDULING: Build in _POSIX_PRIORITY_SCHEDULING
 1009 
 1010 options         _KPOSIX_PRIORITY_SCHEDULING
 1011 # p1003_1b_semaphores are very experimental,
 1012 # user should be ready to assist in debugging if problems arise.
 1013 options         P1003_1B_SEMAPHORES
 1014 
 1015 
 1016 #####################################################################
 1017 # SECURITY POLICY PARAMETERS
 1018 
 1019 # Support for BSM audit
 1020 options         AUDIT
 1021 
 1022 # Support for Mandatory Access Control (MAC):
 1023 options         MAC
 1024 options         MAC_BIBA
 1025 options         MAC_BSDEXTENDED
 1026 options         MAC_DEBUG
 1027 options         MAC_IFOFF
 1028 options         MAC_LOMAC
 1029 options         MAC_MLS
 1030 options         MAC_NONE
 1031 options         MAC_PARTITION
 1032 options         MAC_PORTACL
 1033 options         MAC_SEEOTHERUIDS
 1034 options         MAC_STUB
 1035 options         MAC_TEST
 1036 
 1037 
 1038 #####################################################################
 1039 # CLOCK OPTIONS
 1040 
 1041 # The granularity of operation is controlled by the kernel option HZ whose
 1042 # default value (1000 on most architectures) means a granularity of 1ms
 1043 # (1s/HZ).  Historically, the default was 100, but finer granularity is
 1044 # required for DUMMYNET and other systems on modern hardware.  There are
 1045 # reasonable arguments that HZ should, in fact, be 100 still; consider,
 1046 # that reducing the granularity too much might cause excessive overhead in
 1047 # clock interrupt processing, potentially causing ticks to be missed and thus
 1048 # actually reducing the accuracy of operation.
 1049 
 1050 options         HZ=100
 1051 
 1052 # Enable support for the kernel PLL to use an external PPS signal,
 1053 # under supervision of [x]ntpd(8)
 1054 # More info in ntpd documentation: http://www.eecis.udel.edu/~ntp
 1055 
 1056 options         PPS_SYNC
 1057 
 1058 
 1059 #####################################################################
 1060 # SCSI DEVICES
 1061 
 1062 # SCSI DEVICE CONFIGURATION
 1063 
 1064 # The SCSI subsystem consists of the `base' SCSI code, a number of
 1065 # high-level SCSI device `type' drivers, and the low-level host-adapter
 1066 # device drivers.  The host adapters are listed in the ISA and PCI
 1067 # device configuration sections below.
 1068 #
 1069 # It is possible to wire down your SCSI devices so that a given bus,
 1070 # target, and LUN always come on line as the same device unit.  In
 1071 # earlier versions the unit numbers were assigned in the order that
 1072 # the devices were probed on the SCSI bus.  This means that if you
 1073 # removed a disk drive, you may have had to rewrite your /etc/fstab
 1074 # file, and also that you had to be careful when adding a new disk
 1075 # as it may have been probed earlier and moved your device configuration
 1076 # around.  (See also option GEOM_VOL for a different solution to this
 1077 # problem.)
 1078 
 1079 # This old behavior is maintained as the default behavior.  The unit
 1080 # assignment begins with the first non-wired down unit for a device
 1081 # type.  For example, if you wire a disk as "da3" then the first
 1082 # non-wired disk will be assigned da4.
 1083 
 1084 # The syntax for wiring down devices is:
 1085 
 1086 hint.scbus.0.at="ahc0"
 1087 hint.scbus.1.at="ahc1"
 1088 hint.scbus.1.bus="0"
 1089 hint.scbus.3.at="ahc2"
 1090 hint.scbus.3.bus="0"
 1091 hint.scbus.2.at="ahc2"
 1092 hint.scbus.2.bus="1"
 1093 hint.da.0.at="scbus0"
 1094 hint.da.0.target="0"
 1095 hint.da.0.unit="0"
 1096 hint.da.1.at="scbus3"
 1097 hint.da.1.target="1"
 1098 hint.da.2.at="scbus2"
 1099 hint.da.2.target="3"
 1100 hint.sa.1.at="scbus1"
 1101 hint.sa.1.target="6"
 1102 
 1103 # "units" (SCSI logical unit number) that are not specified are
 1104 # treated as if specified as LUN 0.
 1105 
 1106 # All SCSI devices allocate as many units as are required.
 1107 
 1108 # The ch driver drives SCSI Media Changer ("jukebox") devices.
 1109 #
 1110 # The da driver drives SCSI Direct Access ("disk") and Optical Media
 1111 # ("WORM") devices.
 1112 #
 1113 # The sa driver drives SCSI Sequential Access ("tape") devices.
 1114 #
 1115 # The cd driver drives SCSI Read Only Direct Access ("cd") devices.
 1116 #
 1117 # The ses driver drives SCSI Environment Services ("ses") and
 1118 # SAF-TE ("SCSI Accessible Fault-Tolerant Enclosure") devices.
 1119 #
 1120 # The pt driver drives SCSI Processor devices.
 1121 #
 1122 # The sg driver provides a passthrough API that is compatible with the
 1123 # Linux SG driver.  It will work in conjunction with the COMPAT_LINUX
 1124 # option to run linux SG apps.  It can also stand on its own and provide
 1125 # source level API compatiblity for porting apps to FreeBSD.
 1126 #
 1127 # Target Mode support is provided here but also requires that a SIM
 1128 # (SCSI Host Adapter Driver) provide support as well.
 1129 #
 1130 # The targ driver provides target mode support as a Processor type device.
 1131 # It exists to give the minimal context necessary to respond to Inquiry
 1132 # commands. There is a sample user application that shows how the rest
 1133 # of the command support might be done in /usr/share/examples/scsi_target.
 1134 #
 1135 # The targbh driver provides target mode support and exists to respond
 1136 # to incoming commands that do not otherwise have a logical unit assigned
 1137 # to them.
 1138 #
 1139 # The "unknown" device (uk? in pre-2.0.5) is now part of the base SCSI
 1140 # configuration as the "pass" driver.
 1141 
 1142 device          scbus           #base SCSI code
 1143 device          ch              #SCSI media changers
 1144 device          da              #SCSI direct access devices (aka disks)
 1145 device          sa              #SCSI tapes
 1146 device          cd              #SCSI CD-ROMs
 1147 device          ses             #SCSI Environmental Services (and SAF-TE)
 1148 device          pt              #SCSI processor
 1149 device          targ            #SCSI Target Mode Code
 1150 device          targbh          #SCSI Target Mode Blackhole Device
 1151 device          pass            #CAM passthrough driver
 1152 device          sg              #Linux SCSI passthrough
 1153 
 1154 # CAM OPTIONS:
 1155 # debugging options:
 1156 # -- NOTE --  If you specify one of the bus/target/lun options, you must
 1157 #             specify them all!
 1158 # CAMDEBUG: When defined enables debugging macros
 1159 # CAM_DEBUG_BUS:  Debug the given bus.  Use -1 to debug all busses.
 1160 # CAM_DEBUG_TARGET:  Debug the given target.  Use -1 to debug all targets.
 1161 # CAM_DEBUG_LUN:  Debug the given lun.  Use -1 to debug all luns.
 1162 # CAM_DEBUG_FLAGS:  OR together CAM_DEBUG_INFO, CAM_DEBUG_TRACE,
 1163 #                   CAM_DEBUG_SUBTRACE, and CAM_DEBUG_CDB
 1164 #
 1165 # CAM_MAX_HIGHPOWER: Maximum number of concurrent high power (start unit) cmds
 1166 # CAM_NEW_TRAN_CODE: this is the new transport layer code that will be switched
 1167 #                       to soon
 1168 # SCSI_NO_SENSE_STRINGS: When defined disables sense descriptions
 1169 # SCSI_NO_OP_STRINGS: When defined disables opcode descriptions
 1170 # SCSI_DELAY: The number of MILLISECONDS to freeze the SIM (scsi adapter)
 1171 #             queue after a bus reset, and the number of milliseconds to
 1172 #             freeze the device queue after a bus device reset.  This
 1173 #             can be changed at boot and runtime with the
 1174 #             kern.cam.scsi_delay tunable/sysctl.
 1175 options         CAMDEBUG
 1176 options         CAM_DEBUG_BUS=-1
 1177 options         CAM_DEBUG_TARGET=-1
 1178 options         CAM_DEBUG_LUN=-1
 1179 options         CAM_DEBUG_FLAGS=(CAM_DEBUG_INFO|CAM_DEBUG_TRACE|CAM_DEBUG_CDB)
 1180 options         CAM_MAX_HIGHPOWER=4
 1181 options         SCSI_NO_SENSE_STRINGS
 1182 options         SCSI_NO_OP_STRINGS
 1183 options         SCSI_DELAY=5000 # Be pessimistic about Joe SCSI device
 1184 
 1185 # Options for the CAM CDROM driver:
 1186 # CHANGER_MIN_BUSY_SECONDS: Guaranteed minimum time quantum for a changer LUN
 1187 # CHANGER_MAX_BUSY_SECONDS: Maximum time quantum per changer LUN, only
 1188 #                           enforced if there is I/O waiting for another LUN
 1189 # The compiled in defaults for these variables are 2 and 10 seconds,
 1190 # respectively.
 1191 #
 1192 # These can also be changed on the fly with the following sysctl variables:
 1193 # kern.cam.cd.changer.min_busy_seconds
 1194 # kern.cam.cd.changer.max_busy_seconds
 1195 #
 1196 options         CHANGER_MIN_BUSY_SECONDS=2
 1197 options         CHANGER_MAX_BUSY_SECONDS=10
 1198 
 1199 # Options for the CAM sequential access driver:
 1200 # SA_IO_TIMEOUT: Timeout for read/write/wfm  operations, in minutes
 1201 # SA_SPACE_TIMEOUT: Timeout for space operations, in minutes
 1202 # SA_REWIND_TIMEOUT: Timeout for rewind operations, in minutes
 1203 # SA_ERASE_TIMEOUT: Timeout for erase operations, in minutes
 1204 # SA_1FM_AT_EOD: Default to model which only has a default one filemark at EOT.
 1205 options         SA_IO_TIMEOUT=4
 1206 options         SA_SPACE_TIMEOUT=60
 1207 options         SA_REWIND_TIMEOUT=(2*60)
 1208 options         SA_ERASE_TIMEOUT=(4*60)
 1209 options         SA_1FM_AT_EOD
 1210 
 1211 # Optional timeout for the CAM processor target (pt) device
 1212 # This is specified in seconds.  The default is 60 seconds.
 1213 options         SCSI_PT_DEFAULT_TIMEOUT=60
 1214 
 1215 # Optional enable of doing SES passthrough on other devices (e.g., disks)
 1216 #
 1217 # Normally disabled because a lot of newer SCSI disks report themselves
 1218 # as having SES capabilities, but this can then clot up attempts to build
 1219 # build a topology with the SES device that's on the box these drives
 1220 # are in....
 1221 options         SES_ENABLE_PASSTHROUGH
 1222 
 1223 
 1224 #####################################################################
 1225 # MISCELLANEOUS DEVICES AND OPTIONS
 1226 
 1227 # The `pty' device usually turns out to be ``effectively mandatory'',
 1228 # as it is required for `telnetd', `rlogind', `screen', `emacs', and
 1229 # `xterm', among others.
 1230 
 1231 device          pty             #Pseudo ttys
 1232 device          nmdm            #back-to-back tty devices
 1233 device          md              #Memory/malloc disk
 1234 device          snp             #Snoop device - to look at pty/vty/etc..
 1235 device          ccd             #Concatenated disk driver
 1236 device          firmware        #firmware(9) support
 1237 
 1238 # Kernel side iconv library
 1239 options         LIBICONV
 1240 
 1241 # Size of the kernel message buffer.  Should be N * pagesize.
 1242 options         MSGBUF_SIZE=40960
 1243 
 1244 # Maximum size of a tty or pty input buffer.
 1245 options         TTYHOG=8193
 1246 
 1247 
 1248 #####################################################################
 1249 # HARDWARE DEVICE CONFIGURATION
 1250 
 1251 # For ISA the required hints are listed.
 1252 # EISA, MCA, PCI and pccard are self identifying buses, so no hints
 1253 # are needed.
 1254 
 1255 #
 1256 # Mandatory devices:
 1257 #
 1258 
 1259 # The keyboard controller; it controls the keyboard and the PS/2 mouse.
 1260 device          atkbdc
 1261 hint.atkbdc.0.at="isa"
 1262 hint.atkbdc.0.port="0x060"
 1263 
 1264 # The AT keyboard
 1265 device          atkbd
 1266 hint.atkbd.0.at="atkbdc"
 1267 hint.atkbd.0.irq="1"
 1268 
 1269 # Options for atkbd:
 1270 options         ATKBD_DFLT_KEYMAP       # specify the built-in keymap
 1271 makeoptions     ATKBD_DFLT_KEYMAP=jp.106
 1272 
 1273 # These options are valid for other keyboard drivers as well.
 1274 options         KBD_DISABLE_KEYMAP_LOAD # refuse to load a keymap
 1275 options         KBD_INSTALL_CDEV        # install a CDEV entry in /dev
 1276 
 1277 # `flags' for atkbd:
 1278 #       0x01    Force detection of keyboard, else we always assume a keyboard
 1279 #       0x02    Don't reset keyboard, useful for some newer ThinkPads
 1280 #       0x03    Force detection and avoid reset, might help with certain
 1281 #               dockingstations
 1282 #       0x04    Old-style (XT) keyboard support, useful for older ThinkPads
 1283 
 1284 # PS/2 mouse
 1285 device          psm
 1286 hint.psm.0.at="atkbdc"
 1287 hint.psm.0.irq="12"
 1288 
 1289 # Options for psm:
 1290 options         PSM_HOOKRESUME          #hook the system resume event, useful
 1291                                         #for some laptops
 1292 options         PSM_RESETAFTERSUSPEND   #reset the device at the resume event
 1293 
 1294 # Video card driver for VGA adapters.
 1295 device          vga
 1296 hint.vga.0.at="isa"
 1297 
 1298 # Options for vga:
 1299 # Try the following option if the mouse pointer is not drawn correctly
 1300 # or font does not seem to be loaded properly.  May cause flicker on
 1301 # some systems.
 1302 options         VGA_ALT_SEQACCESS
 1303 
 1304 # If you can dispense with some vga driver features, you may want to
 1305 # use the following options to save some memory.
 1306 #options        VGA_NO_FONT_LOADING     # don't save/load font
 1307 #options        VGA_NO_MODE_CHANGE      # don't change video modes
 1308 
 1309 # Older video cards may require this option for proper operation.
 1310 options         VGA_SLOW_IOACCESS       # do byte-wide i/o's to TS and GDC regs
 1311 
 1312 # The following option probably won't work with the LCD displays.
 1313 options         VGA_WIDTH90             # support 90 column modes
 1314 
 1315 options         FB_DEBUG                # Frame buffer debugging
 1316 
 1317 device          splash                  # Splash screen and screen saver support
 1318 
 1319 # Various screen savers.
 1320 device          blank_saver
 1321 device          daemon_saver
 1322 device          dragon_saver
 1323 device          fade_saver
 1324 device          fire_saver
 1325 device          green_saver
 1326 device          logo_saver
 1327 device          rain_saver
 1328 device          snake_saver
 1329 device          star_saver
 1330 device          warp_saver
 1331 
 1332 # The syscons console driver (sco color console compatible).
 1333 device          sc
 1334 hint.sc.0.at="isa"
 1335 options         MAXCONS=16              # number of virtual consoles
 1336 options         SC_ALT_MOUSE_IMAGE      # simplified mouse cursor in text mode
 1337 options         SC_DFLT_FONT            # compile font in
 1338 makeoptions     SC_DFLT_FONT=cp850
 1339 options         SC_DISABLE_KDBKEY       # disable `debug' key
 1340 options         SC_DISABLE_REBOOT       # disable reboot key sequence
 1341 options         SC_HISTORY_SIZE=200     # number of history buffer lines
 1342 options         SC_MOUSE_CHAR=0x3       # char code for text mode mouse cursor
 1343 options         SC_PIXEL_MODE           # add support for the raster text mode
 1344 
 1345 # The following options will let you change the default colors of syscons.
 1346 options         SC_NORM_ATTR=(FG_GREEN|BG_BLACK)
 1347 options         SC_NORM_REV_ATTR=(FG_YELLOW|BG_GREEN)
 1348 options         SC_KERNEL_CONS_ATTR=(FG_RED|BG_BLACK)
 1349 options         SC_KERNEL_CONS_REV_ATTR=(FG_BLACK|BG_RED)
 1350 
 1351 # The following options will let you change the default behaviour of
 1352 # cut-n-paste feature
 1353 options         SC_CUT_SPACES2TABS      # convert leading spaces into tabs
 1354 options         SC_CUT_SEPCHARS=\"x09\" # set of characters that delimit words
 1355                                         # (default is single space - \"x20\")
 1356 
 1357 # If you have a two button mouse, you may want to add the following option
 1358 # to use the right button of the mouse to paste text.
 1359 options         SC_TWOBUTTON_MOUSE
 1360 
 1361 # You can selectively disable features in syscons.
 1362 options         SC_NO_CUTPASTE
 1363 options         SC_NO_FONT_LOADING
 1364 options         SC_NO_HISTORY
 1365 options         SC_NO_SYSMOUSE
 1366 options         SC_NO_SUSPEND_VTYSWITCH
 1367 
 1368 # `flags' for sc
 1369 #       0x80    Put the video card in the VESA 800x600 dots, 16 color mode
 1370 #       0x100   Probe for a keyboard device periodically if one is not present
 1371 
 1372 #
 1373 # Optional devices:
 1374 #
 1375 
 1376 #
 1377 # SCSI host adapters:
 1378 #
 1379 # adv: All Narrow SCSI bus AdvanSys controllers.
 1380 # adw: Second Generation AdvanSys controllers including the ADV940UW.
 1381 # aha: Adaptec 154x/1535/1640
 1382 # ahb: Adaptec 174x EISA controllers
 1383 # ahc: Adaptec 274x/284x/2910/293x/294x/394x/3950x/3960x/398X/4944/
 1384 #      19160x/29160x, aic7770/aic78xx
 1385 # ahd: Adaptec 29320/39320 Controllers.
 1386 # aic: Adaptec 6260/6360, APA-1460 (PC Card), NEC PC9801-100 (C-BUS)
 1387 # amd: Support for the AMD 53C974 SCSI host adapter chip as found on devices
 1388 #      such as the Tekram DC-390(T).
 1389 # bt:  Most Buslogic controllers: including BT-445, BT-54x, BT-64x, BT-74x,
 1390 #      BT-75x, BT-946, BT-948, BT-956, BT-958, SDC3211B, SDC3211F, SDC3222F
 1391 # esp: NCR53c9x.  Only for SBUS hardware right now.
 1392 # isp: Qlogic ISP 1020, 1040 and 1040B PCI SCSI host adapters,
 1393 #      ISP 1240 Dual Ultra SCSI, ISP 1080 and 1280 (Dual) Ultra2,
 1394 #      ISP 12160 Ultra3 SCSI,
 1395 #      Qlogic ISP 2100 and ISP 2200 1Gb Fibre Channel host adapters.
 1396 #      Qlogic ISP 2300 and ISP 2312 2Gb Fibre Channel host adapters.
 1397 # ispfw: Firmware module for Qlogic host adapters
 1398 # mpt: LSI-Logic MPT/Fusion 53c1020 or 53c1030 Ultra4
 1399 #      or FC9x9 Fibre Channel host adapters.
 1400 # ncr: NCR 53C810, 53C825 self-contained SCSI host adapters.
 1401 # sym: Symbios/Logic 53C8XX family of PCI-SCSI I/O processors:
 1402 #      53C810, 53C810A, 53C815, 53C825,  53C825A, 53C860, 53C875,
 1403 #      53C876, 53C885,  53C895, 53C895A, 53C896,  53C897, 53C1510D,
 1404 #      53C1010-33, 53C1010-66.
 1405 # trm: Tekram DC395U/UW/F DC315U adapters.
 1406 # wds: WD7000
 1407 
 1408 #
 1409 # Note that the order is important in order for Buslogic ISA/EISA cards to be
 1410 # probed correctly.
 1411 #
 1412 device          bt
 1413 hint.bt.0.at="isa"
 1414 hint.bt.0.port="0x330"
 1415 device          adv
 1416 hint.adv.0.at="isa"
 1417 device          adw
 1418 device          aha
 1419 hint.aha.0.at="isa"
 1420 device          aic
 1421 hint.aic.0.at="isa"
 1422 device          ahb
 1423 device          ahc
 1424 device          ahd
 1425 device          amd
 1426 device          esp
 1427 device          isp
 1428 hint.isp.0.disable="1"
 1429 hint.isp.0.role="3"
 1430 hint.isp.0.prefer_iomap="1"
 1431 hint.isp.0.prefer_memmap="1"
 1432 hint.isp.0.fwload_disable="1"
 1433 hint.isp.0.ignore_nvram="1"
 1434 hint.isp.0.fullduplex="1"
 1435 hint.isp.0.topology="lport"
 1436 hint.isp.0.topology="nport"
 1437 hint.isp.0.topology="lport-only"
 1438 hint.isp.0.topology="nport-only"
 1439 # we can't get u_int64_t types, nor can we get strings if it's got
 1440 # a leading 0x, hence this silly dodge.
 1441 hint.isp.0.portwnn="w50000000aaaa0000"
 1442 hint.isp.0.nodewnn="w50000000aaaa0001"
 1443 device          ispfw
 1444 device          mpt
 1445 device          ncr
 1446 device          sym
 1447 device          trm
 1448 device          wds
 1449 hint.wds.0.at="isa"
 1450 hint.wds.0.port="0x350"
 1451 hint.wds.0.irq="11"
 1452 hint.wds.0.drq="6"
 1453 
 1454 # The aic7xxx driver will attempt to use memory mapped I/O for all PCI
 1455 # controllers that have it configured only if this option is set. Unfortunately,
 1456 # this doesn't work on some motherboards, which prevents it from being the
 1457 # default.
 1458 options         AHC_ALLOW_MEMIO
 1459 
 1460 # Dump the contents of the ahc controller configuration PROM.
 1461 options         AHC_DUMP_EEPROM
 1462 
 1463 # Bitmap of units to enable targetmode operations.
 1464 options         AHC_TMODE_ENABLE
 1465 
 1466 # Compile in Aic7xxx Debugging code.
 1467 options         AHC_DEBUG
 1468 
 1469 # Aic7xxx driver debugging options. See sys/dev/aic7xxx/aic7xxx.h
 1470 options         AHC_DEBUG_OPTS
 1471 
 1472 # Print register bitfields in debug output.  Adds ~128k to driver
 1473 # See ahc(4).
 1474 options         AHC_REG_PRETTY_PRINT
 1475 
 1476 # Compile in aic79xx debugging code.
 1477 options         AHD_DEBUG
 1478 
 1479 # Aic79xx driver debugging options.  Adds ~215k to driver.  See ahd(4).
 1480 options         AHD_DEBUG_OPTS=0xFFFFFFFF
 1481 
 1482 # Print human-readable register definitions when debugging
 1483 options         AHD_REG_PRETTY_PRINT
 1484 
 1485 # Bitmap of units to enable targetmode operations.
 1486 options         AHD_TMODE_ENABLE
 1487 
 1488 # The adw driver will attempt to use memory mapped I/O for all PCI
 1489 # controllers that have it configured only if this option is set.
 1490 options         ADW_ALLOW_MEMIO
 1491 
 1492 # Options used in dev/isp/ (Qlogic SCSI/FC driver).
 1493 #
 1494 #       ISP_TARGET_MODE         -       enable target mode operation
 1495 #
 1496 options         ISP_TARGET_MODE=1
 1497 
 1498 # Options used in dev/sym/ (Symbios SCSI driver).
 1499 #options        SYM_SETUP_LP_PROBE_MAP  #-Low Priority Probe Map (bits)
 1500                                         # Allows the ncr to take precedence
 1501                                         # 1 (1<<0) -> 810a, 860
 1502                                         # 2 (1<<1) -> 825a, 875, 885, 895
 1503                                         # 4 (1<<2) -> 895a, 896, 1510d
 1504 #options        SYM_SETUP_SCSI_DIFF     #-HVD support for 825a, 875, 885
 1505                                         # disabled:0 (default), enabled:1
 1506 #options        SYM_SETUP_PCI_PARITY    #-PCI parity checking
 1507                                         # disabled:0, enabled:1 (default)
 1508 #options        SYM_SETUP_MAX_LUN       #-Number of LUNs supported
 1509                                         # default:8, range:[1..64]
 1510 
 1511 # The 'asr' driver provides support for current DPT/Adaptec SCSI RAID
 1512 # controllers (SmartRAID V and VI and later).
 1513 # These controllers require the CAM infrastructure.
 1514 #
 1515 device          asr
 1516 
 1517 # The 'dpt' driver provides support for old DPT controllers (http://www.dpt.com/).
 1518 # These have hardware RAID-{0,1,5} support, and do multi-initiator I/O.
 1519 # The DPT controllers are commonly re-licensed under other brand-names -
 1520 # some controllers by Olivetti, Dec, HP, AT&T, SNI, AST, Alphatronic, NEC and
 1521 # Compaq are actually DPT controllers.
 1522 #
 1523 # See src/sys/dev/dpt for debugging and other subtle options.
 1524 #   DPT_MEASURE_PERFORMANCE Enables a set of (semi)invasive metrics. Various
 1525 #                           instruments are enabled.  The tools in
 1526 #                           /usr/sbin/dpt_* assume these to be enabled.
 1527 #   DPT_HANDLE_TIMEOUTS     Normally device timeouts are handled by the DPT.
 1528 #                           If you ant the driver to handle timeouts, enable
 1529 #                           this option.  If your system is very busy, this
 1530 #                           option will create more trouble than solve.
 1531 #   DPT_TIMEOUT_FACTOR      Used to compute the excessive amount of time to
 1532 #                           wait when timing out with the above option.
 1533 #  DPT_DEBUG_xxxx           These are controllable from sys/dev/dpt/dpt.h
 1534 #  DPT_LOST_IRQ             When enabled, will try, once per second, to catch
 1535 #                           any interrupt that got lost.  Seems to help in some
 1536 #                           DPT-firmware/Motherboard combinations.  Minimal
 1537 #                           cost, great benefit.
 1538 #  DPT_RESET_HBA            Make "reset" actually reset the controller
 1539 #                           instead of fudging it.  Only enable this if you
 1540 #                           are 100% certain you need it.
 1541 
 1542 device          dpt
 1543 
 1544 # DPT options
 1545 #!CAM# options  DPT_MEASURE_PERFORMANCE
 1546 #!CAM# options  DPT_HANDLE_TIMEOUTS
 1547 options         DPT_TIMEOUT_FACTOR=4
 1548 options         DPT_LOST_IRQ
 1549 options         DPT_RESET_HBA
 1550 
 1551 #
 1552 # Compaq "CISS" RAID controllers (SmartRAID 5* series)
 1553 # These controllers have a SCSI-like interface, and require the
 1554 # CAM infrastructure.
 1555 #
 1556 device          ciss
 1557 
 1558 #
 1559 # Intel Integrated RAID controllers.
 1560 # This driver was developed and is maintained by Intel.  Contacts
 1561 # at Intel for this driver are
 1562 # "Kannanthanam, Boji T" <boji.t.kannanthanam@intel.com> and
 1563 # "Leubner, Achim" <achim.leubner@intel.com>.
 1564 #
 1565 device          iir
 1566 
 1567 #
 1568 # Mylex AcceleRAID and eXtremeRAID controllers with v6 and later
 1569 # firmware.  These controllers have a SCSI-like interface, and require
 1570 # the CAM infrastructure.
 1571 #
 1572 device          mly
 1573 
 1574 #
 1575 # Compaq Smart RAID, Mylex DAC960 and AMI MegaRAID controllers.  Only
 1576 # one entry is needed; the code will find and configure all supported
 1577 # controllers.
 1578 #
 1579 device          ida             # Compaq Smart RAID
 1580 device          mlx             # Mylex DAC960
 1581 device          amr             # AMI MegaRAID
 1582 device          mfi             # LSI MegaRAID SAS
 1583 device          mfip            # LSI MegaRAID SAS passthrough, requires CAM
 1584 options         MFI_DEBUG
 1585 
 1586 #
 1587 # 3ware ATA RAID
 1588 #
 1589 device          twe             # 3ware ATA RAID
 1590 
 1591 #
 1592 # The 'ATA' driver supports all ATA and ATAPI devices, including PC Card
 1593 # devices. You only need one "device ata" for it to find all
 1594 # PCI and PC Card ATA/ATAPI devices on modern machines.
 1595 device          ata
 1596 device          atadisk         # ATA disk drives
 1597 device          ataraid         # ATA RAID drives
 1598 device          atapicd         # ATAPI CDROM drives
 1599 device          atapifd         # ATAPI floppy drives
 1600 device          atapist         # ATAPI tape drives
 1601 device          atapicam        # emulate ATAPI devices as SCSI ditto via CAM
 1602                                 # needs CAM to be present (scbus & pass)
 1603 #
 1604 # For older non-PCI, non-PnPBIOS systems, these are the hints lines to add:
 1605 hint.ata.0.at="isa"
 1606 hint.ata.0.port="0x1f0"
 1607 hint.ata.0.irq="14"
 1608 hint.ata.1.at="isa"
 1609 hint.ata.1.port="0x170"
 1610 hint.ata.1.irq="15"
 1611 
 1612 #
 1613 # The following options are valid on the ATA driver:
 1614 #
 1615 # ATA_STATIC_ID:        controller numbering is static ie depends on location
 1616 #                       else the device numbers are dynamically allocated.
 1617 
 1618 options         ATA_STATIC_ID
 1619 
 1620 #
 1621 # Standard floppy disk controllers and floppy tapes, supports
 1622 # the Y-E DATA External FDD (PC Card)
 1623 #
 1624 device          fdc
 1625 hint.fdc.0.at="isa"
 1626 hint.fdc.0.port="0x3F0"
 1627 hint.fdc.0.irq="6"
 1628 hint.fdc.0.drq="2"
 1629 #
 1630 # FDC_DEBUG enables floppy debugging.  Since the debug output is huge, you
 1631 # gotta turn it actually on by setting the variable fd_debug with DDB,
 1632 # however.
 1633 options         FDC_DEBUG
 1634 #
 1635 # Activate this line if you happen to have an Insight floppy tape.
 1636 # Probing them proved to be dangerous for people with floppy disks only,
 1637 # so it's "hidden" behind a flag:
 1638 #hint.fdc.0.flags="1"
 1639 
 1640 # Specify floppy devices
 1641 hint.fd.0.at="fdc0"
 1642 hint.fd.0.drive="0"
 1643 hint.fd.1.at="fdc0"
 1644 hint.fd.1.drive="1"
 1645 
 1646 #
 1647 # sio: serial ports (see sio(4)), including support for various
 1648 #      PC Card devices, such as Modem and NICs (see etc/defaults/pccard.conf)
 1649 #
 1650 device          sio
 1651 hint.sio.0.at="isa"
 1652 hint.sio.0.port="0x3F8"
 1653 hint.sio.0.flags="0x10"
 1654 hint.sio.0.irq="4"
 1655 
 1656 # Options for sio:
 1657 options         COM_ESP                 # Code for Hayes ESP.
 1658 options         COM_MULTIPORT           # Code for some cards with shared IRQs.
 1659 options         CONSPEED=115200         # Speed for serial console
 1660                                         # (default 9600).
 1661 
 1662 # `flags' specific to sio(4).  See below for flags used by both sio(4) and
 1663 # uart(4).
 1664 #       0x20    force this unit to be the console (unless there is another
 1665 #               higher priority console).  This replaces the COMCONSOLE option.
 1666 #       0x40    reserve this unit for low level console operations.  Do not
 1667 #               access the device in any normal way.
 1668 # PnP `flags'
 1669 #       0x1     disable probing of this device.  Used to prevent your modem
 1670 #               from being attached as a PnP modem.
 1671 # Other flags for sio that aren't documented in the man page.
 1672 #       0x20000 enable hardware RTS/CTS and larger FIFOs.  Only works for
 1673 #               ST16650A-compatible UARTs.
 1674 
 1675 #
 1676 # uart: newbusified driver for serial interfaces.  It consolidates the sio(4),
 1677 #       sab(4) and zs(4) drivers.
 1678 #
 1679 device          uart
 1680 
 1681 # Options for uart(4)
 1682 options         UART_PPS_ON_CTS         # Do time pulse capturing using CTS
 1683                                         # instead of DCD.
 1684 
 1685 # The following hint should only be used for pure ISA devices.  It is not
 1686 # needed otherwise.  Use of hints is strongly discouraged.
 1687 hint.uart.0.at="isa"
 1688 
 1689 # The following 3 hints are used when the UART is a system device (i.e., a
 1690 # console or debug port), but only on platforms that don't have any other
 1691 # means to pass the information to the kernel.  The unit number of the hint
 1692 # is only used to bundle the hints together.  There is no relation to the
 1693 # unit number of the probed UART.
 1694 hint.uart.0.port="0x3f8"
 1695 hint.uart.0.flags="0x10"
 1696 hint.uart.0.baud="115200"
 1697 
 1698 # `flags' for serial drivers that support consoles like sio(4) and uart(4):
 1699 #       0x10    enable console support for this unit.  Other console flags
 1700 #               (if applicable) are ignored unless this is set.  Enabling
 1701 #               console support does not make the unit the preferred console.
 1702 #               Boot with -h or set boot_serial=YES in the loader.  For sio(4)
 1703 #               specifically, the 0x20 flag can also be set (see above).
 1704 #               Currently, at most one unit can have console support; the
 1705 #               first one (in config file order) with this flag set is
 1706 #               preferred.  Setting this flag for sio0 gives the old behaviour.
 1707 #       0x80    use this port for serial line gdb support in ddb.  Also known
 1708 #               as debug port.
 1709 #
 1710 
 1711 # Options for serial drivers that support consoles:
 1712 options         BREAK_TO_DEBUGGER       # A BREAK on a serial console goes to
 1713                                         # ddb, if available.
 1714 
 1715 # Solaris implements a new BREAK which is initiated by a character
 1716 # sequence CR ~ ^b which is similar to a familiar pattern used on
 1717 # Sun servers by the Remote Console.
 1718 options         ALT_BREAK_TO_DEBUGGER
 1719 
 1720 # PCI Universal Communications driver
 1721 # Supports various single and multi port PCI serial cards. Maybe later
 1722 # also the parallel ports on combination serial/parallel cards. New cards
 1723 # can be added in src/sys/dev/puc/pucdata.c.
 1724 #
 1725 # If the PUC_FASTINTR option is used the driver will try to use fast
 1726 # interrupts. The card must then be the only user of that interrupt.
 1727 # Interrupts cannot be shared when using PUC_FASTINTR.
 1728 device          puc
 1729 options         PUC_FASTINTR
 1730 
 1731 #
 1732 # Network interfaces:
 1733 #
 1734 # MII bus support is required for some PCI 10/100 ethernet NICs,
 1735 # namely those which use MII-compliant transceivers or implement
 1736 # transceiver control interfaces that operate like an MII. Adding
 1737 # "device miibus" to the kernel config pulls in support for
 1738 # the generic miibus API and all of the PHY drivers, including a
 1739 # generic one for PHYs that aren't specifically handled by an
 1740 # individual driver.
 1741 device          miibus
 1742 
 1743 # an:   Aironet 4500/4800 802.11 wireless adapters. Supports the PCMCIA,
 1744 #       PCI and ISA varieties.
 1745 # awi:  Support for IEEE 802.11 PC Card devices using the AMD Am79C930 and
 1746 #       Harris (Intersil) Chipset with PCnetMobile firmware by AMD.
 1747 # bge:  Support for gigabit ethernet adapters based on the Broadcom
 1748 #       BCM570x family of controllers, including the 3Com 3c996-T,
 1749 #       the Netgear GA302T, the SysKonnect SK-9D21 and SK-9D41, and
 1750 #       the embedded gigE NICs on Dell PowerEdge 2550 servers.
 1751 # cm:   Arcnet SMC COM90c26 / SMC COM90c56
 1752 #       (and SMC COM90c66 in '56 compatibility mode) adapters.
 1753 # cnw:  Xircom CNW/Netware Airsurfer PC Card adapter
 1754 # cs:   IBM Etherjet and other Crystal Semi CS89x0-based adapters
 1755 # dc:   Support for PCI fast ethernet adapters based on the DEC/Intel 21143
 1756 #       and various workalikes including:
 1757 #       the ADMtek AL981 Comet and AN985 Centaur, the ASIX Electronics
 1758 #       AX88140A and AX88141, the Davicom DM9100 and DM9102, the Lite-On
 1759 #       82c168 and 82c169 PNIC, the Lite-On/Macronix LC82C115 PNIC II
 1760 #       and the Macronix 98713/98713A/98715/98715A/98725 PMAC. This driver
 1761 #       replaces the old al, ax, dm, pn and mx drivers.  List of brands:
 1762 #       Digital DE500-BA, Kingston KNE100TX, D-Link DFE-570TX, SOHOware SFA110,
 1763 #       SVEC PN102-TX, CNet Pro110B, 120A, and 120B, Compex RL100-TX,
 1764 #       LinkSys LNE100TX, LNE100TX V2.0, Jaton XpressNet, Alfa Inc GFC2204,
 1765 #       KNE110TX.
 1766 # de:   Digital Equipment DC21040
 1767 # em:   Intel Pro/1000 Gigabit Ethernet 82542, 82543, 82544 based adapters.
 1768 # ep:   3Com 3C509, 3C529, 3C556, 3C562D, 3C563D, 3C572, 3C574X, 3C579, 3C589
 1769 #       and PC Card devices using these chipsets.
 1770 # ex:   Intel EtherExpress Pro/10 and other i82595-based adapters,
 1771 #       Olicom Ethernet PC Card devices.
 1772 # fe:   Fujitsu MB86960A/MB86965A Ethernet
 1773 # fea:  DEC DEFEA EISA FDDI adapter
 1774 # fpa:  Support for the Digital DEFPA PCI FDDI. `device fddi' is also needed.
 1775 # fxp:  Intel EtherExpress Pro/100B
 1776 #       (hint of prefer_iomap can be done to prefer I/O instead of Mem mapping)
 1777 # gem:  Apple GMAC/Sun ERI/Sun GEM
 1778 # hme:  Sun HME (Happy Meal Ethernet)
 1779 # jme:  JMicron JMC260 Fast Ethernet/JMC250 Gigabit Ethernet based adapters.
 1780 # le:   AMD Am7900 LANCE and Am79C9xx PCnet
 1781 # lge:  Support for PCI gigabit ethernet adapters based on the Level 1
 1782 #       LXT1001 NetCellerator chipset. This includes the D-Link DGE-500SX,
 1783 #       SMC TigerCard 1000 (SMC9462SX), and some Addtron cards.
 1784 # msk:  Support for gigabit ethernet adapters based on the Marvell/SysKonnect
 1785 #       Yukon II Gigabit controllers, including 88E8021, 88E8022, 88E8061,
 1786 #       88E8062, 88E8035, 88E8036, 88E8038, 88E8050, 88E8052, 88E8053,
 1787 #       88E8055, 88E8056 and D-Link 560T/550SX.
 1788 # my:   Myson Fast Ethernet (MTD80X, MTD89X)
 1789 # nge:  Support for PCI gigabit ethernet adapters based on the National
 1790 #       Semiconductor DP83820 and DP83821 chipset. This includes the
 1791 #       SMC EZ Card 1000 (SMC9462TX), D-Link DGE-500T, Asante FriendlyNet
 1792 #       GigaNIX 1000TA and 1000TPC, the Addtron AEG320T, the LinkSys
 1793 #       EG1032 and EG1064, the Surecom EP-320G-TX and the Netgear GA622T.
 1794 # pcn:  Support for PCI fast ethernet adapters based on the AMD Am79c97x
 1795 #       chipsets, including the PCnet/FAST, PCnet/FAST+, PCnet/PRO and
 1796 #       PCnet/Home. These were previously handled by the lnc driver (and
 1797 #       still will be if you leave this driver out of the kernel).
 1798 # re:   RealTek 8139C+/8169/816xS/811xS/8101E PCI/PCIe Ethernet adapter
 1799 # rl:   Support for PCI fast ethernet adapters based on the RealTek 8129/8139
 1800 #       chipset.  Note that the RealTek driver defaults to using programmed
 1801 #       I/O to do register accesses because memory mapped mode seems to cause
 1802 #       severe lockups on SMP hardware.  This driver also supports the
 1803 #       Accton EN1207D `Cheetah' adapter, which uses a chip called
 1804 #       the MPX 5030/5038, which is either a RealTek in disguise or a
 1805 #       RealTek workalike.  Note that the D-Link DFE-530TX+ uses the RealTek
 1806 #       chipset and is supported by this driver, not the 'vr' driver.
 1807 # sf:   Support for Adaptec Duralink PCI fast ethernet adapters based on the
 1808 #       Adaptec AIC-6915 "starfire" controller.
 1809 #       This includes dual and quad port cards, as well as one 100baseFX card.
 1810 #       Most of these are 64-bit PCI devices, except for one single port
 1811 #       card which is 32-bit.
 1812 # sis:  Support for NICs based on the Silicon Integrated Systems SiS 900,
 1813 #       SiS 7016 and NS DP83815 PCI fast ethernet controller chips.
 1814 # sbsh: Support for Granch SBNI16 SHDSL modem PCI adapters
 1815 # sk:   Support for the SysKonnect SK-984x series PCI gigabit ethernet NICs.
 1816 #       This includes the SK-9841 and SK-9842 single port cards (single mode
 1817 #       and multimode fiber) and the SK-9843 and SK-9844 dual port cards
 1818 #       (also single mode and multimode).
 1819 #       The driver will autodetect the number of ports on the card and
 1820 #       attach each one as a separate network interface.
 1821 # sn:   Support for ISA and PC Card Ethernet devices using the
 1822 #       SMC91C90/92/94/95 chips.
 1823 # ste:  Sundance Technologies ST201 PCI fast ethernet controller, includes
 1824 #       the D-Link DFE-550TX.
 1825 # stge: Support for gigabit ethernet adapters based on the Sundance/Tamarack
 1826 #       TC9021 family of controllers, including the Sundance ST2021/ST2023,
 1827 #       the Sundance/Tamarack TC9021, the D-Link DL-4000 and ASUS NX1101.
 1828 # ti:   Support for PCI gigabit ethernet NICs based on the Alteon Networks
 1829 #       Tigon 1 and Tigon 2 chipsets.  This includes the Alteon AceNIC, the
 1830 #       3Com 3c985, the Netgear GA620 and various others.  Note that you will
 1831 #       probably want to bump up kern.ipc.nmbclusters a lot to use this driver.
 1832 # tl:   Support for the Texas Instruments TNETE100 series 'ThunderLAN'
 1833 #       cards and integrated ethernet controllers.  This includes several
 1834 #       Compaq Netelligent 10/100 cards and the built-in ethernet controllers
 1835 #       in several Compaq Prosignia, Proliant and Deskpro systems.  It also
 1836 #       supports several Olicom 10Mbps and 10/100 boards.
 1837 # tx:   SMC 9432 TX, BTX and FTX cards. (SMC EtherPower II series)
 1838 # txp:  Support for 3Com 3cR990 cards with the "Typhoon" chipset
 1839 # vr:   Support for various fast ethernet adapters based on the VIA
 1840 #       Technologies VT3043 `Rhine I' and VT86C100A `Rhine II' chips,
 1841 #       including the D-Link DFE530TX (see 'rl' for DFE530TX+), the Hawking
 1842 #       Technologies PN102TX, and the AOpen/Acer ALN-320.
 1843 # vx:   3Com 3C590 and 3C595
 1844 # wb:   Support for fast ethernet adapters based on the Winbond W89C840F chip.
 1845 #       Note: this is not the same as the Winbond W89C940F, which is a
 1846 #       NE2000 clone.
 1847 # wi:   Lucent WaveLAN/IEEE 802.11 PCMCIA adapters. Note: this supports both
 1848 #       the PCMCIA and ISA cards: the ISA card is really a PCMCIA to ISA
 1849 #       bridge with a PCMCIA adapter plugged into it.
 1850 # xe:   Xircom/Intel EtherExpress Pro100/16 PC Card ethernet controller,
 1851 #       Accton Fast EtherCard-16, Compaq Netelligent 10/100 PC Card,
 1852 #       Toshiba 10/100 Ethernet PC Card, Xircom 16-bit Ethernet + Modem 56
 1853 # xl:   Support for the 3Com 3c900, 3c905, 3c905B and 3c905C (Fast)
 1854 #       Etherlink XL cards and integrated controllers.  This includes the
 1855 #       integrated 3c905B-TX chips in certain Dell Optiplex and Dell
 1856 #       Precision desktop machines and the integrated 3c905-TX chips
 1857 #       in Dell Latitude laptop docking stations.
 1858 #       Also supported: 3Com 3c980(C)-TX, 3Com 3cSOHO100-TX, 3Com 3c450-TX
 1859 
 1860 # Order for ISA/EISA devices is important here
 1861 
 1862 device          cm
 1863 hint.cm.0.at="isa"
 1864 hint.cm.0.port="0x2e0"
 1865 hint.cm.0.irq="9"
 1866 hint.cm.0.maddr="0xdc000"
 1867 device          cs
 1868 hint.cs.0.at="isa"
 1869 hint.cs.0.port="0x300"
 1870 device          ep
 1871 device          ex
 1872 device          fe
 1873 hint.fe.0.at="isa"
 1874 hint.fe.0.port="0x300"
 1875 device          fea
 1876 device          sn
 1877 hint.sn.0.at="isa"
 1878 hint.sn.0.port="0x300"
 1879 hint.sn.0.irq="10"
 1880 device          an
 1881 device          awi
 1882 device          cnw
 1883 device          wi
 1884 device          xe
 1885 
 1886 # PCI Ethernet NICs that use the common MII bus controller code.
 1887 device          dc              # DEC/Intel 21143 and various workalikes
 1888 device          fxp             # Intel EtherExpress PRO/100B (82557, 82558)
 1889 hint.fxp.0.prefer_iomap="0"
 1890 device          gem             # Apple GMAC/Sun ERI/Sun GEM
 1891 device          hme             # Sun HME (Happy Meal Ethernet)
 1892 device          jme             # JMicron JMC250 Gigabit/JMC260 Fast Ethernet
 1893 device          msk             # Marvell/SysKonnect Yukon II Gigabit Ethernet
 1894 device          my              # Myson Fast Ethernet (MTD80X, MTD89X)
 1895 device          re              # RealTek 8139C+/8169/8169S/8110S
 1896 device          rl              # RealTek 8129/8139
 1897 device          pcn             # AMD Am79C97x PCI 10/100 NICs
 1898 device          sf              # Adaptec AIC-6915 (``Starfire'')
 1899 device          sbsh            # Granch SBNI16 SHDSL modem
 1900 device          sis             # Silicon Integrated Systems SiS 900/SiS 7016
 1901 device          ste             # Sundance ST201 (D-Link DFE-550TX)
 1902 device          stge            # Sundance/Tamarack TC9021 gigabit Ethernet
 1903 device          tl              # Texas Instruments ThunderLAN
 1904 device          tx              # SMC EtherPower II (83c170 ``EPIC'')
 1905 device          vr              # VIA Rhine, Rhine II
 1906 device          wb              # Winbond W89C840F
 1907 device          xl              # 3Com 3c90x (``Boomerang'', ``Cyclone'')
 1908 
 1909 # PCI Ethernet NICs.
 1910 device          de              # DEC/Intel DC21x4x (``Tulip'')
 1911 device          le              # AMD Am7900 LANCE and Am79C9xx PCnet
 1912 device          txp             # 3Com 3cR990 (``Typhoon'')
 1913 device          vx              # 3Com 3c590, 3c595 (``Vortex'')
 1914 
 1915 # PCI Gigabit & FDDI NICs.
 1916 device          bge
 1917 device          cxgb            # Chelsio T3 10 Gigabit Ethernet
 1918 device          lge
 1919 device          nge
 1920 device          sk
 1921 device          ti
 1922 device          fpa
 1923 
 1924 # Use "private" jumbo buffers allocated exclusively for the ti(4) driver.
 1925 # This option is incompatible with the TI_JUMBO_HDRSPLIT option below.
 1926 #options        TI_PRIVATE_JUMBOS
 1927 # Turn on the header splitting option for the ti(4) driver firmware.  This
 1928 # only works for Tigon II chips, and has no effect for Tigon I chips.
 1929 options         TI_JUMBO_HDRSPLIT
 1930 
 1931 # These two options allow manipulating the mbuf cluster size and mbuf size,
 1932 # respectively.  Be very careful with NIC driver modules when changing
 1933 # these from their default values, because that can potentially cause a
 1934 # mismatch between the mbuf size assumed by the kernel and the mbuf size
 1935 # assumed by a module.  The only driver that currently has the ability to
 1936 # detect a mismatch is ti(4).
 1937 options         MCLSHIFT=12     # mbuf cluster shift in bits, 12 == 4KB
 1938 options         MSIZE=512       # mbuf size in bytes
 1939 
 1940 #
 1941 # ATM related options (Cranor version)
 1942 # (note: this driver cannot be used with the HARP ATM stack)
 1943 #
 1944 # The `en' device provides support for Efficient Networks (ENI)
 1945 # ENI-155 PCI midway cards, and the Adaptec 155Mbps PCI ATM cards (ANA-59x0).
 1946 #
 1947 # The `hatm' device provides support for Fore/Marconi HE155 and HE622
 1948 # ATM PCI cards.
 1949 #
 1950 # The `fatm' device provides support for Fore PCA200E ATM PCI cards.
 1951 #
 1952 # The `patm' device provides support for IDT77252 based cards like
 1953 # ProSum's ProATM-155 and ProATM-25 and IDT's evaluation boards.
 1954 #
 1955 # atm device provides generic atm functions and is required for
 1956 # atm devices.
 1957 # NATM enables the netnatm protocol family that can be used to
 1958 # bypass TCP/IP.
 1959 #
 1960 # utopia provides the access to the ATM PHY chips and is required for en,
 1961 # hatm and fatm.
 1962 #
 1963 # the current driver supports only PVC operations (no atm-arp, no multicast).
 1964 # for more details, please read the original documents at
 1965 # http://www.ccrc.wustl.edu/pub/chuck/tech/bsdatm/bsdatm.html
 1966 #
 1967 device          atm
 1968 device          en
 1969 device          fatm                    #Fore PCA200E
 1970 device          hatm                    #Fore/Marconi HE155/622
 1971 device          patm                    #IDT77252 cards (ProATM and IDT)
 1972 device          utopia                  #ATM PHY driver
 1973 options         NATM                    #native ATM
 1974 
 1975 options         LIBMBPOOL               #needed by patm, iatm
 1976 
 1977 #
 1978 # Sound drivers
 1979 #
 1980 # sound: The generic sound driver.
 1981 #
 1982 
 1983 device          sound
 1984 
 1985 #
 1986 # snd_*: Device-specific drivers.
 1987 #
 1988 # The flags of the device tells the device a bit more info about the
 1989 # device that normally is obtained through the PnP interface.
 1990 #       bit  2..0   secondary DMA channel;
 1991 #       bit  4      set if the board uses two dma channels;
 1992 #       bit 15..8   board type, overrides autodetection; leave it
 1993 #                   zero if don't know what to put in (and you don't,
 1994 #                   since this is unsupported at the moment...).
 1995 #
 1996 # snd_ad1816:           Analog Devices AD1816 ISA PnP/non-PnP.
 1997 # snd_als4000:          Avance Logic ALS4000 PCI.
 1998 # snd_atiixp:           ATI IXP 200/300/400 PCI.
 1999 # snd_au88x0            Aureal Vortex 1/2/Advantage PCI. This driver
 2000 #                       lacks support for playback and recording.
 2001 # snd_audiocs:          Crystal Semiconductor CS4231 SBus/EBus. Only
 2002 #                       for sparc64.
 2003 # snd_cmi:              CMedia CMI8338/CMI8738 PCI.
 2004 # snd_cs4281:           Crystal Semiconductor CS4281 PCI.
 2005 # snd_csa:              Crystal Semiconductor CS461x/428x PCI. (except
 2006 #                       4281)
 2007 # snd_ds1:              Yamaha DS-1 PCI.
 2008 # snd_emu10k1:          Creative EMU10K1 PCI and EMU10K2 (Audigy) PCI.
 2009 # snd_envy24:           VIA Envy24 and compatible, needs snd_spicds.
 2010 # snd_envy24ht:         VIA Envy24HT and compatible, needs snd_spicds.
 2011 # snd_es137x:           Ensoniq AudioPCI ES137x PCI.
 2012 # snd_ess:              Ensoniq ESS ISA PnP/non-PnP, to be used in
 2013 #                       conjunction with snd_sbc.
 2014 # snd_fm801:            Forte Media FM801 PCI.
 2015 # snd_gusc:             Gravis UltraSound ISA PnP/non-PnP.
 2016 # snd_hda:              Intel High Definition Audio (Controller) and
 2017 #                       compatible.
 2018 # snd_ich:              Intel ICH PCI and some more audio controllers
 2019 #                       embedded in a chipset, for example nVidia
 2020 #                       nForce controllers.
 2021 # snd_maestro:          ESS Technology Maestro-1/2x PCI.
 2022 # snd_maestro3:         ESS Technology Maestro-3/Allegro PCI.
 2023 # snd_mss:              Microsoft Sound System ISA PnP/non-PnP.
 2024 # snd_neomagic:         Neomagic 256 AV/ZX PCI.
 2025 # snd_sb16:             Creative SoundBlaster16, to be used in
 2026 #                       conjuction with snd_sbc.
 2027 # snd_sb8:              Creative SoundBlaster (pre-16), to be used in
 2028 #                       conjuction with snd_sbc.
 2029 # snd_sbc:              Creative SoundBlaster ISA PnP/non-PnP.
 2030 #                       Supports ESS and Avance ISA chips as well.
 2031 # snd_solo:             ESS Solo-1x PCI.
 2032 # snd_t4dwave:          Trident 4DWave DX/NX PCI, Sis 7018 PCI and Acer Labs
 2033 #                       M5451 PCI.
 2034 # snd_via8233:          VIA VT8233x PCI.
 2035 # snd_via82c686:        VIA VT82C686A PCI.
 2036 # snd_vibes:            S3 Sonicvibes PCI.
 2037 # snd_uaudio:           USB audio.
 2038 
 2039 device          snd_ad1816
 2040 device          snd_als4000
 2041 device          snd_atiixp
 2042 #device         snd_au88x0
 2043 #device         snd_audiocs
 2044 device          snd_cmi
 2045 device          snd_cs4281
 2046 device          snd_csa
 2047 device          snd_ds1
 2048 device          snd_emu10k1
 2049 device          snd_envy24
 2050 device          snd_envy24ht
 2051 device          snd_es137x
 2052 device          snd_ess
 2053 device          snd_fm801
 2054 device          snd_gusc
 2055 device          snd_hda
 2056 device          snd_ich
 2057 device          snd_maestro
 2058 device          snd_maestro3
 2059 device          snd_mss
 2060 device          snd_neomagic
 2061 device          snd_sb16
 2062 device          snd_sb8
 2063 device          snd_sbc
 2064 device          snd_solo
 2065 device          snd_spicds
 2066 device          snd_t4dwave
 2067 device          snd_via8233
 2068 device          snd_via82c686
 2069 device          snd_vibes
 2070 device          snd_uaudio
 2071 
 2072 # For non-pnp sound cards:
 2073 hint.pcm.0.at="isa"
 2074 hint.pcm.0.irq="10"
 2075 hint.pcm.0.drq="1"
 2076 hint.pcm.0.flags="0x0"
 2077 hint.sbc.0.at="isa"
 2078 hint.sbc.0.port="0x220"
 2079 hint.sbc.0.irq="5"
 2080 hint.sbc.0.drq="1"
 2081 hint.sbc.0.flags="0x15"
 2082 hint.gusc.0.at="isa"
 2083 hint.gusc.0.port="0x220"
 2084 hint.gusc.0.irq="5"
 2085 hint.gusc.0.drq="1"
 2086 hint.gusc.0.flags="0x13"
 2087 
 2088 #
 2089 # IEEE-488 hardware:
 2090 #       pcii:   PCIIA cards (uPD7210 based isa cards)
 2091 device  pcii
 2092 hint.pcii.0.at="isa"
 2093 hint.pcii.0.port="0x2e1"
 2094 hint.pcii.0.irq="5"
 2095 hint.pcii.0.drq="1"
 2096 
 2097 #
 2098 # Miscellaneous hardware:
 2099 #
 2100 # scd: Sony CD-ROM using proprietary (non-ATAPI) interface
 2101 # mcd: Mitsumi CD-ROM using proprietary (non-ATAPI) interface
 2102 # bktr: Brooktree bt848/848a/849a/878/879 video capture and TV Tuner board
 2103 # cy: Cyclades serial driver
 2104 # joy: joystick (including IO DATA PCJOY PC Card joystick)
 2105 # rc: RISCom/8 multiport card
 2106 # rp: Comtrol Rocketport(ISA/PCI) - single card
 2107 # si: Specialix SI/XIO 4-32 port terminal multiplexor
 2108 # nmdm: nullmodem terminal driver (see nmdm(4))
 2109 
 2110 # Notes on the Comtrol Rocketport driver:
 2111 #
 2112 # The exact values used for rp0 depend on how many boards you have
 2113 # in the system.  The manufacturer's sample configs are listed as:
 2114 #
 2115 #               device  rp      # core driver support
 2116 #
 2117 #   Comtrol Rocketport ISA single card
 2118 #               hint.rp.0.at="isa"
 2119 #               hint.rp.0.port="0x280"
 2120 #
 2121 #   If instead you have two ISA cards, one installed at 0x100 and the
 2122 #   second installed at 0x180, then you should add the following to
 2123 #   your kernel probe hints:
 2124 #               hint.rp.0.at="isa"
 2125 #               hint.rp.0.port="0x100"
 2126 #               hint.rp.1.at="isa"
 2127 #               hint.rp.1.port="0x180"
 2128 #
 2129 #   For 4 ISA cards, it might be something like this:
 2130 #               hint.rp.0.at="isa"
 2131 #               hint.rp.0.port="0x180"
 2132 #               hint.rp.1.at="isa"
 2133 #               hint.rp.1.port="0x100"
 2134 #               hint.rp.2.at="isa"
 2135 #               hint.rp.2.port="0x340"
 2136 #               hint.rp.3.at="isa"
 2137 #               hint.rp.3.port="0x240"
 2138 #
 2139 #   For PCI cards, you need no hints.
 2140 
 2141 # Mitsumi CD-ROM
 2142 device          mcd
 2143 hint.mcd.0.at="isa"
 2144 hint.mcd.0.port="0x300"
 2145 # for the Sony CDU31/33A CDROM
 2146 device          scd
 2147 hint.scd.0.at="isa"
 2148 hint.scd.0.port="0x230"
 2149 device          joy                     # PnP aware, hints for nonpnp only
 2150 hint.joy.0.at="isa"
 2151 hint.joy.0.port="0x201"
 2152 device          rc
 2153 hint.rc.0.at="isa"
 2154 hint.rc.0.port="0x220"
 2155 hint.rc.0.irq="12"
 2156 device          rp
 2157 hint.rp.0.at="isa"
 2158 hint.rp.0.port="0x280"
 2159 device          si
 2160 options         SI_DEBUG
 2161 hint.si.0.at="isa"
 2162 hint.si.0.maddr="0xd0000"
 2163 hint.si.0.irq="12"
 2164 device          nmdm
 2165 
 2166 #
 2167 # The 'bktr' device is a PCI video capture device using the Brooktree
 2168 # bt848/bt848a/bt849a/bt878/bt879 chipset. When used with a TV Tuner it forms a
 2169 # TV card, e.g. Miro PC/TV, Hauppauge WinCast/TV WinTV, VideoLogic Captivator,
 2170 # Intel Smart Video III, AverMedia, IMS Turbo, FlyVideo.
 2171 #
 2172 # options       OVERRIDE_CARD=xxx
 2173 # options       OVERRIDE_TUNER=xxx
 2174 # options       OVERRIDE_MSP=1
 2175 # options       OVERRIDE_DBX=1
 2176 # These options can be used to override the auto detection
 2177 # The current values for xxx are found in src/sys/dev/bktr/bktr_card.h
 2178 # Using sysctl(8) run-time overrides on a per-card basis can be made
 2179 #
 2180 # options       BROOKTREE_SYSTEM_DEFAULT=BROOKTREE_PAL
 2181 # or
 2182 # options       BROOKTREE_SYSTEM_DEFAULT=BROOKTREE_NTSC
 2183 # Specifies the default video capture mode.
 2184 # This is required for Dual Crystal (28&35Mhz) boards where PAL is used
 2185 # to prevent hangs during initialisation, e.g. VideoLogic Captivator PCI.
 2186 #
 2187 # options       BKTR_USE_PLL
 2188 # This is required for PAL or SECAM boards with a 28Mhz crystal and no 35Mhz
 2189 # crystal, e.g. some new Bt878 cards.
 2190 #
 2191 # options       BKTR_GPIO_ACCESS
 2192 # This enable IOCTLs which give user level access to the GPIO port.
 2193 #
 2194 # options       BKTR_NO_MSP_RESET
 2195 # Prevents the MSP34xx reset. Good if you initialise the MSP in another OS first
 2196 #
 2197 # options       BKTR_430_FX_MODE
 2198 # Switch Bt878/879 cards into Intel 430FX chipset compatibility mode.
 2199 #
 2200 # options       BKTR_SIS_VIA_MODE
 2201 # Switch Bt878/879 cards into SIS/VIA chipset compatibility mode which is
 2202 # needed for some old SiS and VIA chipset motherboards.
 2203 # This also allows Bt878/879 chips to work on old OPTi (<1997) chipset
 2204 # motherboards and motherboards with bad or incomplete PCI 2.1 support.
 2205 # As a rough guess, old = before 1998
 2206 #
 2207 # options       BKTR_NEW_MSP34XX_DRIVER
 2208 # Use new, more complete initialization scheme for the msp34* soundchip.
 2209 # Should fix stereo autodetection if the old driver does only output
 2210 # mono sound.
 2211 
 2212 #
 2213 # options       BKTR_USE_FREEBSD_SMBUS
 2214 # Compile with FreeBSD SMBus implementation
 2215 #
 2216 # Brooktree driver has been ported to the new I2C framework. Thus,
 2217 # you'll need to have the following 3 lines in the kernel config.
 2218 #     device smbus
 2219 #     device iicbus
 2220 #     device iicbb
 2221 #     device iicsmb
 2222 # The iic and smb devices are only needed if you want to control other
 2223 # I2C slaves connected to the external connector of some cards.
 2224 #
 2225 device          bktr
 2226 
 2227 #
 2228 # PC Card/PCMCIA and Cardbus
 2229 # (NEWCARD)
 2230 #
 2231 # pccbb: pci/cardbus bridge implementing YENTA interface
 2232 # pccard: pccard slots
 2233 # cardbus: cardbus slots
 2234 device          cbb
 2235 device          pccard
 2236 device          cardbus
 2237 
 2238 #
 2239 # SMB bus
 2240 #
 2241 # System Management Bus support is provided by the 'smbus' device.
 2242 # Access to the SMBus device is via the 'smb' device (/dev/smb*),
 2243 # which is a child of the 'smbus' device.
 2244 #
 2245 # Supported devices:
 2246 # smb           standard I/O through /dev/smb*
 2247 #
 2248 # Supported SMB interfaces:
 2249 # iicsmb        I2C to SMB bridge with any iicbus interface
 2250 # bktr          brooktree848 I2C hardware interface
 2251 # intpm         Intel PIIX4 (82371AB, 82443MX) Power Management Unit
 2252 # alpm          Acer Aladdin-IV/V/Pro2 Power Management Unit
 2253 # ichsmb        Intel ICH SMBus controller chips (82801AA, 82801AB, 82801BA)
 2254 # viapm         VIA VT82C586B/596B/686A and VT8233 Power Management Unit
 2255 # amdpm         AMD 756 Power Management Unit
 2256 # amdsmb        AMD 8111 SMBus 2.0 Controller
 2257 # nfpm          NVIDIA nForce Power Management Unit
 2258 # nfsmb         NVIDIA nForce2/3/4 MCP SMBus 2.0 Controller
 2259 #
 2260 device          smbus           # Bus support, required for smb below.
 2261 
 2262 device          intpm
 2263 device          alpm
 2264 device          ichsmb
 2265 device          viapm
 2266 device          amdpm
 2267 device          amdsmb
 2268 device          nfpm
 2269 device          nfsmb
 2270 
 2271 device          smb
 2272 
 2273 #
 2274 # I2C Bus
 2275 #
 2276 # Philips i2c bus support is provided by the `iicbus' device.
 2277 #
 2278 # Supported devices:
 2279 # ic    i2c network interface
 2280 # iic   i2c standard io
 2281 # iicsmb i2c to smb bridge. Allow i2c i/o with smb commands.
 2282 #
 2283 # Supported interfaces:
 2284 # bktr  brooktree848 I2C software interface
 2285 #
 2286 # Other:
 2287 # iicbb generic I2C bit-banging code (needed by lpbb, bktr)
 2288 #
 2289 device          iicbus          # Bus support, required for ic/iic/iicsmb below.
 2290 device          iicbb
 2291 
 2292 device          ic
 2293 device          iic
 2294 device          iicsmb          # smb over i2c bridge
 2295 
 2296 # Parallel-Port Bus
 2297 #
 2298 # Parallel port bus support is provided by the `ppbus' device.
 2299 # Multiple devices may be attached to the parallel port, devices
 2300 # are automatically probed and attached when found.
 2301 #
 2302 # Supported devices:
 2303 # vpo   Iomega Zip Drive
 2304 #       Requires SCSI disk support ('scbus' and 'da'), best
 2305 #       performance is achieved with ports in EPP 1.9 mode.
 2306 # lpt   Parallel Printer
 2307 # plip  Parallel network interface
 2308 # ppi   General-purpose I/O ("Geek Port") + IEEE1284 I/O
 2309 # pps   Pulse per second Timing Interface
 2310 # lpbb  Philips official parallel port I2C bit-banging interface
 2311 #
 2312 # Supported interfaces:
 2313 # ppc   ISA-bus parallel port interfaces.
 2314 #
 2315 
 2316 options         PPC_PROBE_CHIPSET # Enable chipset specific detection
 2317                                   # (see flags in ppc(4))
 2318 options         DEBUG_1284      # IEEE1284 signaling protocol debug
 2319 options         PERIPH_1284     # Makes your computer act as an IEEE1284
 2320                                 # compliant peripheral
 2321 options         DONTPROBE_1284  # Avoid boot detection of PnP parallel devices
 2322 options         VP0_DEBUG       # ZIP/ZIP+ debug
 2323 options         LPT_DEBUG       # Printer driver debug
 2324 options         PPC_DEBUG       # Parallel chipset level debug
 2325 options         PLIP_DEBUG      # Parallel network IP interface debug
 2326 options         PCFCLOCK_VERBOSE         # Verbose pcfclock driver
 2327 options         PCFCLOCK_MAX_RETRIES=5   # Maximum read tries (default 10)
 2328 
 2329 device          ppc
 2330 hint.ppc.0.at="isa"
 2331 hint.ppc.0.irq="7"
 2332 device          ppbus
 2333 device          vpo
 2334 device          lpt
 2335 device          plip
 2336 device          ppi
 2337 device          pps
 2338 device          lpbb
 2339 device          pcfclock
 2340 
 2341 # Kernel BOOTP support
 2342 
 2343 options         BOOTP           # Use BOOTP to obtain IP address/hostname
 2344                                 # Requires NFSCLIENT and NFS_ROOT
 2345 options         BOOTP_NFSROOT   # NFS mount root filesystem using BOOTP info
 2346 options         BOOTP_NFSV3     # Use NFS v3 to NFS mount root
 2347 options         BOOTP_COMPAT    # Workaround for broken bootp daemons.
 2348 options         BOOTP_WIRED_TO=fxp0 # Use interface fxp0 for BOOTP
 2349 
 2350 #
 2351 # Add software watchdog routines.
 2352 #
 2353 options         SW_WATCHDOG
 2354 
 2355 #
 2356 # Disable swapping of stack pages.  This option removes all
 2357 # code which actually performs swapping, so it's not possible to turn
 2358 # it back on at run-time.
 2359 #
 2360 # This is sometimes usable for systems which don't have any swap space
 2361 # (see also sysctls "vm.defer_swapspace_pageouts" and
 2362 # "vm.disable_swapspace_pageouts")
 2363 #
 2364 #options        NO_SWAPPING
 2365 
 2366 # Set the number of sf_bufs to allocate. sf_bufs are virtual buffers
 2367 # for sendfile(2) that are used to map file VM pages, and normally
 2368 # default to a quantity that is roughly 16*MAXUSERS+512. You would
 2369 # typically want about 4 of these for each simultaneous file send.
 2370 #
 2371 options         NSFBUFS=1024
 2372 
 2373 #
 2374 # Enable extra debugging code for locks.  This stores the filename and
 2375 # line of whatever acquired the lock in the lock itself, and change a
 2376 # number of function calls to pass around the relevant data.  This is
 2377 # not at all useful unless you are debugging lock code.  Also note
 2378 # that it is likely to break e.g. fstat(1) unless you recompile your
 2379 # userland with -DDEBUG_LOCKS as well.
 2380 #
 2381 options         DEBUG_LOCKS
 2382 
 2383 
 2384 #####################################################################
 2385 # USB support
 2386 # UHCI controller
 2387 device          uhci
 2388 # OHCI controller
 2389 device          ohci
 2390 # EHCI controller
 2391 device          ehci
 2392 # General USB code (mandatory for USB)
 2393 device          usb
 2394 #
 2395 # USB Double Bulk Pipe devices
 2396 device          udbp
 2397 # USB Fm Radio
 2398 device          ufm
 2399 # Generic USB device driver
 2400 device          ugen
 2401 # Human Interface Device (anything with buttons and dials)
 2402 device          uhid
 2403 # USB keyboard
 2404 device          ukbd
 2405 # USB printer
 2406 device          ulpt
 2407 # USB Iomega Zip 100 Drive (Requires scbus and da)
 2408 device          umass
 2409 # USB support for Belkin F5U109 and Magic Control Technology serial adapters
 2410 device          umct
 2411 # USB modem support
 2412 device          umodem
 2413 # USB mouse
 2414 device          ums
 2415 # Diamond Rio 500 Mp3 player
 2416 device          urio
 2417 # USB scanners
 2418 device          uscanner
 2419 #
 2420 # USB serial support
 2421 device          ucom
 2422 # USB support for Arkmicro Technologies ARK3116 based serial adapters
 2423 device          uark
 2424 # USB support for Belkin F5U103 and compatible serial adapters
 2425 device          ubsa
 2426 # USB support for BWCT console serial adapters
 2427 device          ubser
 2428 # USB support for serial adapters based on the FT8U100AX and FT8U232AM
 2429 device          uftdi
 2430 # USB support for Prolific PL-2303 serial adapters
 2431 device          uplcom
 2432 # USB Visor and Palm devices
 2433 device          uvisor
 2434 # USB serial support for DDI pocket's PHS
 2435 device          uvscom
 2436 #
 2437 # ADMtek USB ethernet. Supports the LinkSys USB100TX,
 2438 # the Billionton USB100, the Melco LU-ATX, the D-Link DSB-650TX
 2439 # and the SMC 2202USB. Also works with the ADMtek AN986 Pegasus
 2440 # eval board.
 2441 device          aue
 2442 
 2443 # ASIX Electronics AX88172 USB 2.0 ethernet driver. Used in the
 2444 # LinkSys USB200M and various other adapters.
 2445 
 2446 device          axe
 2447 
 2448 #
 2449 # Devices which communicate using Ethernet over USB, particularly
 2450 # Communication Device Class (CDC) Ethernet specification. Supports
 2451 # Sharp Zaurus PDAs, some DOCSIS cable modems and so on.
 2452 device          cdce
 2453 #
 2454 # CATC USB-EL1201A USB ethernet. Supports the CATC Netmate
 2455 # and Netmate II, and the Belkin F5U111.
 2456 device          cue
 2457 #
 2458 # Kawasaki LSI ethernet. Supports the LinkSys USB10T,
 2459 # Entrega USB-NET-E45, Peracom Ethernet Adapter, the
 2460 # 3Com 3c19250, the ADS Technologies USB-10BT, the ATen UC10T,
 2461 # the Netgear EA101, the D-Link DSB-650, the SMC 2102USB
 2462 # and 2104USB, and the Corega USB-T.
 2463 device          kue
 2464 #
 2465 # RealTek RTL8150 USB to fast ethernet. Supports the Melco LUA-KTX
 2466 # and the GREEN HOUSE GH-USB100B.
 2467 device          rue
 2468 #
 2469 # Davicom DM9601E USB to fast ethernet. Supports the Corega FEther USB-TXC.
 2470 device          udav
 2471 
 2472 
 2473 # debugging options for the USB subsystem
 2474 #
 2475 options         USB_DEBUG
 2476 
 2477 # options for ukbd:
 2478 options         UKBD_DFLT_KEYMAP        # specify the built-in keymap
 2479 makeoptions     UKBD_DFLT_KEYMAP=it.iso
 2480 
 2481 # options for uplcom:
 2482 options         UPLCOM_INTR_INTERVAL=100        # interrupt pipe interval
 2483                                                 # in milliseconds
 2484 
 2485 # options for uvscom:
 2486 options         UVSCOM_DEFAULT_OPKTSIZE=8       # default output packet size
 2487 options         UVSCOM_INTR_INTERVAL=100        # interrupt pipe interval
 2488                                                 # in milliseconds
 2489 
 2490 #####################################################################
 2491 # FireWire support
 2492 
 2493 device          firewire        # FireWire bus code
 2494 device          sbp             # SCSI over Firewire (Requires scbus and da)
 2495 device          sbp_targ        # SBP-2 Target mode  (Requires scbus and targ)
 2496 device          fwe             # Ethernet over FireWire (non-standard!)
 2497 device          fwip            # IP over FireWire (rfc2734 and rfc3146)
 2498 
 2499 #####################################################################
 2500 # dcons support (Dumb Console Device)
 2501 
 2502 device          dcons                   # dumb console driver
 2503 device          dcons_crom              # FireWire attachment
 2504 options         DCONS_BUF_SIZE=16384    # buffer size
 2505 options         DCONS_POLL_HZ=100       # polling rate
 2506 options         DCONS_FORCE_CONSOLE=0   # force to be the primary console
 2507 options         DCONS_FORCE_GDB=1       # force to be the gdb device
 2508 
 2509 #####################################################################
 2510 # crypto subsystem
 2511 #
 2512 # This is a port of the openbsd crypto framework.  Include this when
 2513 # configuring FAST_IPSEC and when you have a h/w crypto device to accelerate
 2514 # user applications that link to openssl.
 2515 #
 2516 # Drivers are ports from openbsd with some simple enhancements that have
 2517 # been fed back to openbsd.
 2518 
 2519 device          crypto          # core crypto support
 2520 device          cryptodev       # /dev/crypto for access to h/w
 2521 
 2522 device          rndtest         # FIPS 140-2 entropy tester
 2523 
 2524 device          hifn            # Hifn 7951, 7781, etc.
 2525 options         HIFN_DEBUG      # enable debugging support: hw.hifn.debug
 2526 options         HIFN_RNDTEST    # enable rndtest support
 2527 
 2528 device          ubsec           # Broadcom 5501, 5601, 58xx
 2529 options         UBSEC_DEBUG     # enable debugging support: hw.ubsec.debug
 2530 options         UBSEC_RNDTEST   # enable rndtest support
 2531 
 2532 #####################################################################
 2533 
 2534 
 2535 #
 2536 # Embedded system options:
 2537 #
 2538 # An embedded system might want to run something other than init.
 2539 options         INIT_PATH=/sbin/init:/stand/sysinstall
 2540 
 2541 # Debug options
 2542 options         BUS_DEBUG       # enable newbus debugging
 2543 options         DEBUG_VFS_LOCKS # enable vfs lock debugging
 2544 options         SOCKBUF_DEBUG   # enable sockbuf last record/mb tail checking
 2545 
 2546 #####################################################################
 2547 # SYSV IPC KERNEL PARAMETERS
 2548 #
 2549 # Maximum number of entries in a semaphore map.
 2550 options         SEMMAP=31
 2551 
 2552 # Maximum number of System V semaphores that can be used on the system at
 2553 # one time.
 2554 options         SEMMNI=11
 2555 
 2556 # Total number of semaphores system wide
 2557 options         SEMMNS=61
 2558 
 2559 # Total number of undo structures in system
 2560 options         SEMMNU=31
 2561 
 2562 # Maximum number of System V semaphores that can be used by a single process
 2563 # at one time.
 2564 options         SEMMSL=61
 2565 
 2566 # Maximum number of operations that can be outstanding on a single System V
 2567 # semaphore at one time.
 2568 options         SEMOPM=101
 2569 
 2570 # Maximum number of undo operations that can be outstanding on a single
 2571 # System V semaphore at one time.
 2572 options         SEMUME=11
 2573 
 2574 # Maximum number of shared memory pages system wide.
 2575 options         SHMALL=1025
 2576 
 2577 # Maximum size, in bytes, of a single System V shared memory region.
 2578 options         SHMMAX=(SHMMAXPGS*PAGE_SIZE+1)
 2579 options         SHMMAXPGS=1025
 2580 
 2581 # Minimum size, in bytes, of a single System V shared memory region.
 2582 options         SHMMIN=2
 2583 
 2584 # Maximum number of shared memory regions that can be used on the system
 2585 # at one time.
 2586 options         SHMMNI=33
 2587 
 2588 # Maximum number of System V shared memory regions that can be attached to
 2589 # a single process at one time.
 2590 options         SHMSEG=9
 2591 
 2592 # Set the amount of time (in seconds) the system will wait before
 2593 # rebooting automatically when a kernel panic occurs.  If set to (-1),
 2594 # the system will wait indefinitely until a key is pressed on the
 2595 # console.
 2596 options         PANIC_REBOOT_WAIT_TIME=16
 2597 
 2598 # Attempt to bypass the buffer cache and put data directly into the
 2599 # userland buffer for read operation when O_DIRECT flag is set on the
 2600 # file.  Both offset and length of the read operation must be
 2601 # multiples of the physical media sector size.
 2602 #
 2603 options         DIRECTIO
 2604 
 2605 # Specify a lower limit for the number of swap I/O buffers.  They are
 2606 # (among other things) used when bypassing the buffer cache due to
 2607 # DIRECTIO kernel option enabled and O_DIRECT flag set on file.
 2608 #
 2609 options         NSWBUF_MIN=120
 2610 
 2611 #####################################################################
 2612 
 2613 # More undocumented options for linting.
 2614 # Note that documenting these are not considered an affront.
 2615 
 2616 options         CAM_DEBUG_DELAY
 2617 
 2618 # VFS cluster debugging.
 2619 options         CLUSTERDEBUG
 2620 
 2621 options         DEBUG
 2622 
 2623 # Kernel filelock debugging.
 2624 options         LOCKF_DEBUG
 2625 
 2626 # System V compatible message queues
 2627 # Please note that the values provided here are used to test kernel
 2628 # building.  The defaults in the sources provide almost the same numbers.
 2629 # MSGSSZ must be a power of 2 between 8 and 1024.
 2630 options         MSGMNB=2049     # Max number of chars in queue
 2631 options         MSGMNI=41       # Max number of message queue identifiers
 2632 options         MSGSEG=2049     # Max number of message segments
 2633 options         MSGSSZ=16       # Size of a message segment
 2634 options         MSGTQL=41       # Max number of messages in system
 2635 
 2636 options         NBUF=512        # Number of buffer headers
 2637 
 2638 options         SCSI_NCR_DEBUG
 2639 options         SCSI_NCR_MAX_SYNC=10000
 2640 options         SCSI_NCR_MAX_WIDE=1
 2641 options         SCSI_NCR_MYADDR=7
 2642 
 2643 options         SC_DEBUG_LEVEL=5        # Syscons debug level
 2644 options         SC_RENDER_DEBUG # syscons rendering debugging
 2645 
 2646 options         SHOW_BUSYBUFS   # List buffers that prevent root unmount
 2647 options         SLIP_IFF_OPTS
 2648 options         VFS_BIO_DEBUG   # VFS buffer I/O debugging
 2649 
 2650 options         KSTACK_MAX_PAGES=32 # Maximum pages to give the kernel stack
 2651 
 2652 # Adaptec Array Controller driver options
 2653 options         AAC_DEBUG       # Debugging levels:
 2654                                 # 0 - quiet, only emit warnings
 2655                                 # 1 - noisy, emit major function
 2656                                 #     points and things done
 2657                                 # 2 - extremely noisy, emit trace
 2658                                 #     items in loops, etc.
 2659 
 2660 # Yet more undocumented options for linting.
 2661 # BKTR_ALLOC_PAGES has no effect except to cause warnings, and
 2662 # BROOKTREE_ALLOC_PAGES hasn't actually been superseded by it, since the
 2663 # driver still mostly spells this option BROOKTREE_ALLOC_PAGES.
 2664 ##options       BKTR_ALLOC_PAGES=(217*4+1)
 2665 options         BROOKTREE_ALLOC_PAGES=(217*4+1)
 2666 options         MAXFILES=999
 2667 options         NDEVFSINO=1025
 2668 options         NDEVFSOVERFLOW=32769
 2669 
 2670 # Yet more undocumented options for linting.
 2671 options         VGA_DEBUG

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