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


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

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    1 #
    2 # NOTES -- Lines that can be cut/pasted into kernel and hints configs.
    3 #
    4 # This file contains machine dependent kernel configuration notes.  For
    5 # machine independent notes, look in /sys/conf/NOTES.
    6 #
    7 # $FreeBSD: releng/10.3/sys/i386/conf/NOTES 285809 2015-07-23 05:26:09Z scottl $
    8 #
    9 
   10 #
   11 # We want LINT to cover profiling as well.
   12 profile         2
   13 
   14 #
   15 # Enable the kernel DTrace hooks which are required to load the DTrace
   16 # kernel modules.
   17 #
   18 options         KDTRACE_HOOKS
   19 
   20 
   21 #####################################################################
   22 # SMP OPTIONS:
   23 #
   24 # The apic device enables the use of the I/O APIC for interrupt delivery.
   25 # The apic device can be used in both UP and SMP kernels, but is required
   26 # for SMP kernels.  Thus, the apic device is not strictly an SMP option,
   27 # but it is a prerequisite for SMP.
   28 #
   29 # Notes:
   30 #
   31 # HTT CPUs should only be used if they are enabled in the BIOS.  For
   32 # the ACPI case, ACPI only correctly tells us about any HTT CPUs if
   33 # they are enabled.  However, most HTT systems do not list HTT CPUs
   34 # in the MP Table if they are enabled, thus we guess at the HTT CPUs
   35 # for the MP Table case.  However, we shouldn't try to guess and use
   36 # these CPUs if HTT is disabled.  Thus, HTT guessing is only enabled
   37 # for the MP Table if the user explicitly asks for it via the
   38 # MPTABLE_FORCE_HTT option.  Do NOT use this option if you have HTT
   39 # disabled in your BIOS.
   40 #
   41 # IPI_PREEMPTION instructs the kernel to preempt threads running on other
   42 # CPUS if needed.  Relies on the PREEMPTION option
   43 
   44 # Mandatory:
   45 device          apic                    # I/O apic
   46 
   47 # Optional:
   48 options         MPTABLE_FORCE_HTT       # Enable HTT CPUs with the MP Table
   49 options         IPI_PREEMPTION
   50 
   51 #
   52 # Watchdog routines.
   53 #
   54 options         MP_WATCHDOG
   55 
   56 # Debugging options.
   57 #
   58 options         COUNT_XINVLTLB_HITS     # Counters for TLB events
   59 options         COUNT_IPIS              # Per-CPU IPI interrupt counters
   60 
   61 
   62 
   63 #####################################################################
   64 # CPU OPTIONS
   65 
   66 #
   67 # You must specify at least one CPU (the one you intend to run on);
   68 # deleting the specification for CPUs you don't need to use may make
   69 # parts of the system run faster.
   70 #
   71 cpu             I486_CPU
   72 cpu             I586_CPU                # aka Pentium(tm)
   73 cpu             I686_CPU                # aka Pentium Pro(tm)
   74 
   75 #
   76 # Options for CPU features.
   77 #
   78 # CPU_ATHLON_SSE_HACK tries to enable SSE instructions when the BIOS has
   79 # forgotten to enable them.
   80 #
   81 # CPU_BLUELIGHTNING_3X enables triple-clock mode on IBM Blue Lightning
   82 # CPU if CPU supports it.  The default is double-clock mode on
   83 # BlueLightning CPU box.
   84 #
   85 # CPU_BLUELIGHTNING_FPU_OP_CACHE enables FPU operand cache on IBM
   86 # BlueLightning CPU.  It works only with Cyrix FPU, and this option
   87 # should not be used with Intel FPU.
   88 #
   89 # CPU_BTB_EN enables branch target buffer on Cyrix 5x86 (NOTE 1).
   90 #
   91 # CPU_CYRIX_NO_LOCK enables weak locking for the entire address space
   92 # of Cyrix 6x86 and 6x86MX CPUs by setting the NO_LOCK bit of CCR1.
   93 # Otherwise, the NO_LOCK bit of CCR1 is cleared.  (NOTE 3)
   94 #
   95 # CPU_DIRECT_MAPPED_CACHE sets L1 cache of Cyrix 486DLC CPU in direct
   96 # mapped mode.  Default is 2-way set associative mode.
   97 #
   98 # CPU_DISABLE_5X86_LSSER disables load store serialize (i.e., enables
   99 # reorder).  This option should not be used if you use memory mapped
  100 # I/O device(s).
  101 #
  102 # CPU_DISABLE_CMPXCHG disables the CMPXCHG instruction on > i386 IA32
  103 # machines.  VmWare 3.x seems to emulate this instruction poorly, causing
  104 # the guest OS to run very slowly.  This problem appears to be fixed in
  105 # VmWare 4.x, at least in version 4.5.2, so that enabling this option with
  106 # VmWare 4.x will result in locking operations to be 20-30 times slower.
  107 # Enabling this with an SMP kernel will cause the kernel to be unusable.
  108 #
  109 # CPU_DISABLE_SSE explicitly prevents I686_CPU from turning on SSE.
  110 #
  111 # CPU_ELAN enables support for AMDs ElanSC520 CPU.
  112 #    CPU_ELAN_PPS enables precision timestamp code.
  113 #    CPU_ELAN_XTAL sets the clock crystal frequency in Hz.
  114 #
  115 # CPU_ENABLE_LONGRUN enables support for Transmeta Crusoe LongRun
  116 # technology which allows to restrict power consumption of the CPU by
  117 # using group of hw.crusoe.* sysctls.
  118 #
  119 # CPU_FASTER_5X86_FPU enables faster FPU exception handler.
  120 #
  121 # CPU_GEODE is for the SC1100 Geode embedded processor.  This option
  122 # is necessary because the i8254 timecounter is toast.
  123 #
  124 # CPU_I486_ON_386 enables CPU cache on i486 based CPU upgrade products
  125 # for i386 machines.
  126 #
  127 # CPU_IORT defines I/O clock delay time (NOTE 1).  Default values of
  128 # I/O clock delay time on Cyrix 5x86 and 6x86 are 0 and 7,respectively
  129 # (no clock delay).
  130 #
  131 # CPU_L2_LATENCY specifies the L2 cache latency value.  This option is used
  132 # only when CPU_PPRO2CELERON is defined and Mendocino Celeron is detected.
  133 # The default value is 5.
  134 #
  135 # CPU_LOOP_EN prevents flushing the prefetch buffer if the destination
  136 # of a jump is already present in the prefetch buffer on Cyrix 5x86(NOTE
  137 # 1).
  138 #
  139 # CPU_PPRO2CELERON enables L2 cache of Mendocino Celeron CPUs.  This option
  140 # is useful when you use Socket 8 to Socket 370 converter, because most Pentium
  141 # Pro BIOSs do not enable L2 cache of Mendocino Celeron CPUs.
  142 #
  143 # CPU_RSTK_EN enables return stack on Cyrix 5x86 (NOTE 1).
  144 #
  145 # CPU_SOEKRIS enables support www.soekris.com hardware.
  146 #
  147 # CPU_SUSP_HLT enables suspend on HALT.  If this option is set, CPU
  148 # enters suspend mode following execution of HALT instruction.
  149 #
  150 # CPU_UPGRADE_HW_CACHE eliminates unneeded cache flush instruction(s).
  151 #
  152 # CPU_WT_ALLOC enables write allocation on Cyrix 6x86/6x86MX and AMD
  153 # K5/K6/K6-2 CPUs.
  154 #
  155 # CYRIX_CACHE_WORKS enables CPU cache on Cyrix 486 CPUs with cache
  156 # flush at hold state.
  157 #
  158 # CYRIX_CACHE_REALLY_WORKS enables (1) CPU cache on Cyrix 486 CPUs
  159 # without cache flush at hold state, and (2) write-back CPU cache on
  160 # Cyrix 6x86 whose revision < 2.7 (NOTE 2).
  161 #
  162 # NO_F00F_HACK disables the hack that prevents Pentiums (and ONLY
  163 # Pentiums) from locking up when a LOCK CMPXCHG8B instruction is
  164 # executed.  This option is only needed if I586_CPU is also defined,
  165 # and should be included for any non-Pentium CPU that defines it.
  166 #
  167 # NO_MEMORY_HOLE is an optimisation for systems with AMD K6 processors
  168 # which indicates that the 15-16MB range is *definitely* not being
  169 # occupied by an ISA memory hole.
  170 #
  171 # NOTE 1: The options, CPU_BTB_EN, CPU_LOOP_EN, CPU_IORT,
  172 # CPU_LOOP_EN and CPU_RSTK_EN should not be used because of CPU bugs.
  173 # These options may crash your system.
  174 #
  175 # NOTE 2: If CYRIX_CACHE_REALLY_WORKS is not set, CPU cache is enabled
  176 # in write-through mode when revision < 2.7.  If revision of Cyrix
  177 # 6x86 >= 2.7, CPU cache is always enabled in write-back mode.
  178 #
  179 # NOTE 3: This option may cause failures for software that requires
  180 # locked cycles in order to operate correctly.
  181 #
  182 options         CPU_ATHLON_SSE_HACK
  183 options         CPU_BLUELIGHTNING_3X
  184 options         CPU_BLUELIGHTNING_FPU_OP_CACHE
  185 options         CPU_BTB_EN
  186 options         CPU_DIRECT_MAPPED_CACHE
  187 options         CPU_DISABLE_5X86_LSSER
  188 options         CPU_DISABLE_CMPXCHG
  189 #options        CPU_DISABLE_SSE
  190 options         CPU_ELAN
  191 options         CPU_ELAN_PPS
  192 options         CPU_ELAN_XTAL=32768000
  193 options         CPU_ENABLE_LONGRUN
  194 options         CPU_FASTER_5X86_FPU
  195 options         CPU_GEODE
  196 options         CPU_I486_ON_386
  197 options         CPU_IORT
  198 options         CPU_L2_LATENCY=5
  199 options         CPU_LOOP_EN
  200 options         CPU_PPRO2CELERON
  201 options         CPU_RSTK_EN
  202 options         CPU_SOEKRIS
  203 options         CPU_SUSP_HLT
  204 options         CPU_UPGRADE_HW_CACHE
  205 options         CPU_WT_ALLOC
  206 options         CYRIX_CACHE_WORKS
  207 options         CYRIX_CACHE_REALLY_WORKS
  208 #options        NO_F00F_HACK
  209 
  210 # Debug options
  211 options         NPX_DEBUG       # enable npx debugging
  212 
  213 #
  214 # PERFMON causes the driver for Pentium/Pentium Pro performance counters
  215 # to be compiled.  See perfmon(4) for more information.
  216 #
  217 options         PERFMON
  218 
  219 #
  220 # XBOX causes the kernel to be bootable on the Microsoft XBox console system.
  221 # The resulting kernel will auto-detect whether it is being booted on a XBox,
  222 # so kernels compiled with this option will also work on an ordinary PC.
  223 # This option require I686_CPU.
  224 #
  225 # xboxfb includes support for the XBox frame buffer device. It is fully USB-
  226 # keyboard aware, and will only be used if an xbox is detected. This option
  227 # (obviously) requires XBOX support in your kernel.
  228 #
  229 # NOTE: xboxfb currently conflicts with syscons(4); if you have an XBOX and
  230 # include both in your kernel; you will not get any video output. Ordinary
  231 # PC's do not suffer from this.
  232 #
  233 options         XBOX
  234 device          xboxfb
  235 
  236 
  237 #####################################################################
  238 # NETWORKING OPTIONS
  239 
  240 #
  241 # DEVICE_POLLING adds support for mixed interrupt-polling handling
  242 # of network device drivers, which has significant benefits in terms
  243 # of robustness to overloads and responsivity, as well as permitting
  244 # accurate scheduling of the CPU time between kernel network processing
  245 # and other activities.  The drawback is a moderate (up to 1/HZ seconds)
  246 # potential increase in response times.
  247 # It is strongly recommended to use HZ=1000 or 2000 with DEVICE_POLLING
  248 # to achieve smoother behaviour.
  249 # Additionally, you can enable/disable polling at runtime with help of
  250 # the ifconfig(8) utility, and select the CPU fraction reserved to
  251 # userland with the sysctl variable kern.polling.user_frac
  252 # (default 50, range 0..100).
  253 #
  254 # Not all device drivers support this mode of operation at the time of
  255 # this writing.  See polling(4) for more details.
  256 
  257 options         DEVICE_POLLING
  258 
  259 # BPF_JITTER adds support for BPF just-in-time compiler.
  260 
  261 options         BPF_JITTER
  262 
  263 # OpenFabrics Enterprise Distribution (Infiniband).
  264 options         OFED
  265 options         OFED_DEBUG_INIT
  266 
  267 # Sockets Direct Protocol
  268 options         SDP
  269 options         SDP_DEBUG
  270 
  271 # IP over Infiniband
  272 options         IPOIB
  273 options         IPOIB_DEBUG
  274 options         IPOIB_CM
  275 
  276 
  277 #####################################################################
  278 # CLOCK OPTIONS
  279 
  280 # Provide read/write access to the memory in the clock chip.
  281 device          nvram           # Access to rtc cmos via /dev/nvram
  282 
  283 
  284 #####################################################################
  285 # MISCELLANEOUS DEVICES AND OPTIONS
  286 
  287 device          speaker         #Play IBM BASIC-style noises out your speaker
  288 hint.speaker.0.at="isa"
  289 hint.speaker.0.port="0x61"
  290 device          gzip            #Exec gzipped a.out's.  REQUIRES COMPAT_AOUT!
  291 device          apm_saver       # Requires APM
  292 
  293 
  294 #####################################################################
  295 # HARDWARE BUS CONFIGURATION
  296 
  297 #
  298 # ISA bus
  299 #
  300 device          isa             # Required by npx(4)
  301 
  302 #
  303 # Options for `isa':
  304 #
  305 # AUTO_EOI_1 enables the `automatic EOI' feature for the master 8259A
  306 # interrupt controller.  This saves about 0.7-1.25 usec for each interrupt.
  307 # This option breaks suspend/resume on some portables.
  308 #
  309 # AUTO_EOI_2 enables the `automatic EOI' feature for the slave 8259A
  310 # interrupt controller.  This saves about 0.7-1.25 usec for each interrupt.
  311 # Automatic EOI is documented not to work for for the slave with the
  312 # original i8259A, but it works for some clones and some integrated
  313 # versions.
  314 #
  315 # MAXMEM specifies the amount of RAM on the machine; if this is not
  316 # specified, FreeBSD will first read the amount of memory from the CMOS
  317 # RAM, so the amount of memory will initially be limited to 64MB or 16MB
  318 # depending on the BIOS.  If the BIOS reports 64MB, a memory probe will
  319 # then attempt to detect the installed amount of RAM.  If this probe
  320 # fails to detect >64MB RAM you will have to use the MAXMEM option.
  321 # The amount is in kilobytes, so for a machine with 128MB of RAM, it would
  322 # be 131072 (128 * 1024).
  323 #
  324 # BROKEN_KEYBOARD_RESET disables the use of the keyboard controller to
  325 # reset the CPU for reboot.  This is needed on some systems with broken
  326 # keyboard controllers.
  327 
  328 options         AUTO_EOI_1
  329 #options        AUTO_EOI_2
  330 
  331 options         MAXMEM=(128*1024)
  332 #options        BROKEN_KEYBOARD_RESET
  333 
  334 #
  335 # EISA bus
  336 #
  337 # The EISA bus device is `eisa'.  It provides auto-detection and
  338 # configuration support for all devices on the EISA bus.
  339 
  340 device          eisa
  341 
  342 # By default, only 10 EISA slots are probed, since the slot numbers
  343 # above clash with the configuration address space of the PCI subsystem,
  344 # and the EISA probe is not very smart about this.  This is sufficient
  345 # for most machines, but in particular the HP NetServer LC series comes
  346 # with an onboard AIC7770 dual-channel SCSI controller on EISA slot #11,
  347 # thus you need to bump this figure to 12 for them.
  348 options         EISA_SLOTS=12
  349 
  350 #
  351 # MCA bus:
  352 #
  353 # The MCA bus device is `mca'.  It provides auto-detection and
  354 # configuration support for all devices on the MCA bus.
  355 # No hints are required for MCA.
  356 
  357 device          mca
  358 
  359 #
  360 # PCI bus & PCI options:
  361 #
  362 device          pci
  363 
  364 #
  365 # AGP GART support
  366 device          agp
  367 
  368 # AGP debugging.
  369 options         AGP_DEBUG
  370 
  371 
  372 #####################################################################
  373 # HARDWARE DEVICE CONFIGURATION
  374 
  375 # To include support for VGA VESA video modes
  376 options         VESA
  377 
  378 # Turn on extra debugging checks and output for VESA support.
  379 options         VESA_DEBUG
  380 
  381 device          dpms            # DPMS suspend & resume via VESA BIOS
  382 
  383 # x86 real mode BIOS emulator, required by atkbdc/dpms/vesa
  384 options         X86BIOS
  385 
  386 #
  387 # The Numeric Processing eXtension driver.  This is non-optional.
  388 device          npx
  389 hint.npx.0.flags="0x0"
  390 hint.npx.0.irq="13"
  391 
  392 #
  393 # `flags' for npx0:
  394 #       0x01    don't use the npx registers to optimize bcopy.
  395 #       0x02    don't use the npx registers to optimize bzero.
  396 #       0x04    don't use the npx registers to optimize copyin or copyout.
  397 # The npx registers are normally used to optimize copying and zeroing when
  398 # all of the following conditions are satisfied:
  399 #       I586_CPU is an option
  400 #       the cpu is an i586 (perhaps not a Pentium)
  401 #       the probe for npx0 succeeds
  402 #       INT 16 exception handling works.
  403 # Then copying and zeroing using the npx registers is normally 30-100% faster.
  404 # The flags can be used to control cases where it doesn't work or is slower.
  405 # Setting them at boot time using hints works right (the optimizations
  406 # are not used until later in the bootstrap when npx0 is attached).
  407 # Flag 0x08 automatically disables the i586 optimized routines.
  408 #
  409 
  410 #
  411 # Optional devices:
  412 #
  413 
  414 # PS/2 mouse
  415 device          psm
  416 hint.psm.0.at="atkbdc"
  417 hint.psm.0.irq="12"
  418 
  419 # Options for psm:
  420 options         PSM_HOOKRESUME          #hook the system resume event, useful
  421                                         #for some laptops
  422 options         PSM_RESETAFTERSUSPEND   #reset the device at the resume event
  423 
  424 # The keyboard controller; it controls the keyboard and the PS/2 mouse.
  425 device          atkbdc
  426 hint.atkbdc.0.at="isa"
  427 hint.atkbdc.0.port="0x060"
  428 
  429 # The AT keyboard
  430 device          atkbd
  431 hint.atkbd.0.at="atkbdc"
  432 hint.atkbd.0.irq="1"
  433 
  434 # Options for atkbd:
  435 options         ATKBD_DFLT_KEYMAP       # specify the built-in keymap
  436 makeoptions     ATKBD_DFLT_KEYMAP=jp.106
  437 
  438 # `flags' for atkbd:
  439 #       0x01    Force detection of keyboard, else we always assume a keyboard
  440 #       0x02    Don't reset keyboard, useful for some newer ThinkPads
  441 #       0x03    Force detection and avoid reset, might help with certain
  442 #               dockingstations
  443 #       0x04    Old-style (XT) keyboard support, useful for older ThinkPads
  444 
  445 # Video card driver for VGA adapters.
  446 device          vga
  447 hint.vga.0.at="isa"
  448 
  449 # Options for vga:
  450 # Try the following option if the mouse pointer is not drawn correctly
  451 # or font does not seem to be loaded properly.  May cause flicker on
  452 # some systems.
  453 options         VGA_ALT_SEQACCESS
  454 
  455 # If you can dispense with some vga driver features, you may want to
  456 # use the following options to save some memory.
  457 #options        VGA_NO_FONT_LOADING     # don't save/load font
  458 #options        VGA_NO_MODE_CHANGE      # don't change video modes
  459 
  460 # Older video cards may require this option for proper operation.
  461 options         VGA_SLOW_IOACCESS       # do byte-wide i/o's to TS and GDC regs
  462 
  463 # The following option probably won't work with the LCD displays.
  464 options         VGA_WIDTH90             # support 90 column modes
  465 
  466 # Debugging.
  467 options         VGA_DEBUG
  468 
  469 # Linear framebuffer driver for S3 VESA 1.2 cards. Works on top of VESA.
  470 device          s3pci
  471 
  472 # 3Dfx Voodoo Graphics, Voodoo II /dev/3dfx CDEV support.  This will create
  473 # the /dev/3dfx0 device to work with glide implementations.  This should get
  474 # linked to /dev/3dfx and /dev/voodoo.  Note that this is not the same as
  475 # the tdfx DRI module from XFree86 and is completely unrelated.
  476 #
  477 # To enable Linuxulator support, one must also include COMPAT_LINUX in the
  478 # config as well.  The other option is to load both as modules.
  479 
  480 device          tdfx                    # Enable 3Dfx Voodoo support
  481 device          tdfx_linux              # Enable Linuxulator support
  482 
  483 #
  484 # ACPI support using the Intel ACPI Component Architecture reference
  485 # implementation.
  486 #
  487 # ACPI_DEBUG enables the use of the debug.acpi.level and debug.acpi.layer
  488 # kernel environment variables to select initial debugging levels for the
  489 # Intel ACPICA code.  (Note that the Intel code must also have USE_DEBUGGER
  490 # defined when it is built).
  491 
  492 device          acpi
  493 options         ACPI_DEBUG
  494 options         ACPI_DMAR
  495 
  496 # ACPI WMI Mapping driver
  497 device          acpi_wmi
  498 
  499 # ACPI Asus Extras (LCD backlight/brightness, video output, etc.)
  500 device          acpi_asus
  501 
  502 # ACPI Fujitsu Extras (Buttons)
  503 device          acpi_fujitsu
  504 
  505 # ACPI extras driver for HP laptops
  506 device          acpi_hp
  507 
  508 # ACPI extras driver for IBM laptops
  509 device          acpi_ibm
  510 
  511 # ACPI Panasonic Extras (LCD backlight/brightness, video output, etc.)
  512 device          acpi_panasonic
  513 
  514 # ACPI Sony extra (LCD brightness)
  515 device          acpi_sony
  516 
  517 # ACPI Toshiba Extras (LCD backlight/brightness, video output, etc.)
  518 device          acpi_toshiba
  519 
  520 # ACPI Video Extensions (LCD backlight/brightness, video output, etc.)
  521 device          acpi_video
  522 
  523 # ACPI Docking Station
  524 device          acpi_dock
  525 
  526 # ACPI ASOC ATK0110 ASUSTeK AI Booster (voltage, temperature and fan sensors)
  527 device          aibs
  528 
  529 # The cpufreq(4) driver provides support for non-ACPI CPU frequency control
  530 device          cpufreq
  531 
  532 # Direct Rendering modules for 3D acceleration.
  533 device          drm             # DRM core module required by DRM drivers
  534 device          i915drm         # Intel i830 through i915
  535 device          mach64drm       # ATI Rage Pro, Rage Mobility P/M, Rage XL
  536 device          mgadrm          # AGP Matrox G200, G400, G450, G550
  537 device          r128drm         # ATI Rage 128
  538 device          radeondrm       # ATI Radeon
  539 device          savagedrm       # S3 Savage3D, Savage4
  540 device          sisdrm          # SiS 300/305, 540, 630
  541 device          tdfxdrm         # 3dfx Voodoo 3/4/5 and Banshee
  542 device          viadrm          # VIA
  543 options         DRM_DEBUG       # Include debug printfs (slow)
  544 
  545 #
  546 # mse: Logitech and ATI InPort bus mouse ports
  547 
  548 device          mse
  549 hint.mse.0.at="isa"
  550 hint.mse.0.port="0x23c"
  551 hint.mse.0.irq="5"
  552 
  553 #
  554 # Network interfaces:
  555 #
  556 
  557 # bxe:  Broadcom NetXtreme II (BCM5771X/BCM578XX) PCIe 10Gb Ethernet
  558 #       adapters.
  559 # ce:   Cronyx Tau-PCI/32 sync single/dual port G.703/E1 serial adaptor
  560 #       with 32 HDLC subchannels (requires sppp (default), or NETGRAPH if
  561 #       NETGRAPH_CRONYX is configured)
  562 # cp:   Cronyx Tau-PCI sync single/dual/four port
  563 #       V.35/RS-232/RS-530/RS-449/X.21/G.703/E1/E3/T3/STS-1
  564 #       serial adaptor (requires sppp (default), or NETGRAPH if
  565 #       NETGRAPH_CRONYX is configured)
  566 # cs:   IBM Etherjet and other Crystal Semi CS89x0-based adapters
  567 # ctau: Cronyx Tau sync dual port V.35/RS-232/RS-530/RS-449/X.21/G.703/E1
  568 #       serial adaptor (requires sppp (default), or NETGRAPH if
  569 #       NETGRAPH_CRONYX is configured)
  570 # ed:   Western Digital and SMC 80xx; Novell NE1000 and NE2000; 3Com 3C503
  571 #       HP PC Lan+, various PC Card devices
  572 #       (requires miibus)
  573 # ie:   AT&T StarLAN 10 and EN100; 3Com 3C507; unknown NI5210;
  574 #       Intel EtherExpress
  575 # ipw:  Intel PRO/Wireless 2100 IEEE 802.11 adapter
  576 # iwi:  Intel PRO/Wireless 2200BG/2225BG/2915ABG IEEE 802.11 adapters
  577 #       Requires the iwi firmware module
  578 # iwn:  Intel Wireless WiFi Link 4965AGN 802.11 network adapters
  579 #       Requires the iwn firmware module
  580 # mlx4ib: Mellanox ConnectX HCA InfiniBand
  581 # mlxen: Mellanox ConnectX HCA Ethernet
  582 # mthca: Mellanox HCA InfiniBand
  583 # nfe:  nVidia nForce MCP on-board Ethernet Networking (BSD open source)
  584 # nve:  nVidia nForce MCP on-board Ethernet Networking
  585 # sbni: Granch SBNI12-xx ISA and PCI adapters
  586 # vmx:  VMware VMXNET3 Ethernet (BSD open source)
  587 # wl:   Lucent Wavelan (ISA card only).
  588 # wpi:  Intel 3945ABG Wireless LAN controller
  589 #       Requires the wpi firmware module
  590 
  591 # Order for ISA/EISA devices is important here
  592 
  593 device          bxe             # Broadcom NetXtreme II BCM5771X/BCM578XX 10GbE
  594 device          ce
  595 device          cp
  596 device          cs              # Crystal Semiconductor CS89x0 NIC
  597 hint.cs.0.at="isa"
  598 hint.cs.0.port="0x300"
  599 device          ctau
  600 hint.ctau.0.at="isa"
  601 hint.ctau.0.port="0x240"
  602 hint.ctau.0.irq="15"
  603 hint.ctau.0.drq="7"
  604 #options        NETGRAPH_CRONYX         # Enable NETGRAPH support for Cronyx adapter(s)
  605 device          ed              # NE[12]000, SMC Ultra, 3c503, DS8390 cards
  606 options         ED_3C503
  607 options         ED_HPP
  608 options         ED_SIC
  609 hint.ed.0.at="isa"
  610 hint.ed.0.port="0x280"
  611 hint.ed.0.irq="5"
  612 hint.ed.0.maddr="0xd8000"
  613 device          ie              # EtherExpress 8/16, 3C507, StarLAN 10 etc.
  614 # Hints only required for Starlan
  615 hint.ie.2.at="isa"
  616 hint.ie.2.port="0x300"
  617 hint.ie.2.irq="5"
  618 hint.ie.2.maddr="0xd0000"
  619 device          ipw             # Intel 2100 wireless NICs.
  620 device          iwi             # Intel 2200BG/2225BG/2915ABG wireless NICs.
  621 device          iwn             # Intel 4965/1000/5000/6000 wireless NICs.
  622 # Hint for the i386-only ISA front-end of le(4).
  623 hint.le.0.at="isa"
  624 hint.le.0.port="0x280"
  625 hint.le.0.irq="10"
  626 hint.le.0.drq="0"
  627 device          mlx4ib          # Mellanox ConnectX HCA InfiniBand
  628 device          mlxen           # Mellanox ConnectX HCA Ethernet
  629 device          mthca           # Mellanox HCA InfiniBand
  630 device          nfe             # nVidia nForce MCP on-board Ethernet
  631 device          nve             # nVidia nForce MCP on-board Ethernet Networking
  632 device          sbni
  633 hint.sbni.0.at="isa"
  634 hint.sbni.0.port="0x210"
  635 hint.sbni.0.irq="0xefdead"
  636 hint.sbni.0.flags="0"
  637 device          vmx             # VMware VMXNET3 Ethernet
  638 device          wl
  639 hint.wl.0.at="isa"
  640 hint.wl.0.port="0x300"
  641 options         WLCACHE         # enables the signal-strength cache
  642 options         WLDEBUG         # enables verbose debugging output
  643 device          wpi             # Intel 3945ABG wireless NICs.
  644 
  645 # IEEE 802.11 adapter firmware modules
  646 
  647 # Intel PRO/Wireless 2100 firmware:
  648 #   ipwfw:              BSS/IBSS/monitor mode firmware
  649 #   ipwbssfw:           BSS mode firmware
  650 #   ipwibssfw:          IBSS mode firmware
  651 #   ipwmonitorfw:       Monitor mode firmware
  652 # Intel PRO/Wireless 2200BG/2225BG/2915ABG firmware:
  653 #   iwifw:              BSS/IBSS/monitor mode firmware
  654 #   iwibssfw:           BSS mode firmware
  655 #   iwiibssfw:          IBSS mode firmware
  656 #   iwimonitorfw:       Monitor mode firmware
  657 # Intel Wireless WiFi Link 4965/1000/5000/6000 series firmware:
  658 #   iwnfw:              Single module to support the 4965/1000/5000/5150/6000
  659 #   iwn4965fw:          Specific module for the 4965 only
  660 #   iwn1000fw:          Specific module for the 1000 only
  661 #   iwn5000fw:          Specific module for the 5000 only
  662 #   iwn5150fw:          Specific module for the 5150 only
  663 #   iwn6000fw:          Specific module for the 6000 only
  664 #   iwn6050fw:          Specific module for the 6050 only
  665 # wpifw:        Intel 3945ABG Wireless LAN Controller firmware
  666 
  667 device          iwifw
  668 device          iwibssfw
  669 device          iwiibssfw
  670 device          iwimonitorfw
  671 device          ipwfw
  672 device          ipwbssfw
  673 device          ipwibssfw
  674 device          ipwmonitorfw
  675 device          iwnfw
  676 device          iwn4965fw
  677 device          iwn1000fw
  678 device          iwn5000fw
  679 device          iwn5150fw
  680 device          iwn6000fw
  681 device          iwn6050fw
  682 device          wpifw
  683 
  684 #
  685 # ATA raid adapters
  686 #
  687 device          pst
  688 
  689 #
  690 # Areca 11xx and 12xx series of SATA II RAID controllers.
  691 # CAM is required.
  692 #
  693 device          arcmsr          # Areca SATA II RAID
  694 
  695 #
  696 # 3ware 9000 series PATA/SATA RAID controller driver and options.
  697 # The driver is implemented as a SIM, and so, needs the CAM infrastructure.
  698 #
  699 options         TWA_DEBUG               # 0-10; 10 prints the most messages.
  700 options         TWA_FLASH_FIRMWARE      # firmware image bundled when defined.
  701 device          twa                     # 3ware 9000 series PATA/SATA RAID
  702 
  703 #
  704 # SCSI host adapters:
  705 #
  706 # ncv: NCR 53C500 based SCSI host adapters.
  707 # nsp: Workbit Ninja SCSI-3 based PC Card SCSI host adapters.
  708 # stg: TMC 18C30, 18C50 based SCSI host adapters.
  709 
  710 device          ncv
  711 device          nsp
  712 device          stg
  713 hint.stg.0.at="isa"
  714 hint.stg.0.port="0x140"
  715 hint.stg.0.port="11"
  716 
  717 #
  718 # Adaptec FSA RAID controllers, including integrated DELL controllers,
  719 # the Dell PERC 2/QC and the HP NetRAID-4M
  720 device          aac
  721 device          aacp    # SCSI Passthrough interface (optional, CAM required)
  722 
  723 #
  724 # Adaptec by PMC RAID controllers, Series 6/7/8 and upcoming families
  725 device          aacraid         # Container interface, CAM required
  726 
  727 # The 'asr' driver provides support for current DPT/Adaptec SCSI RAID
  728 # controllers (SmartRAID V and VI and later).
  729 # These controllers require the CAM infrastructure.
  730 #
  731 device          asr
  732 
  733 #
  734 # Highpoint RocketRAID 27xx.
  735 device          hpt27xx
  736 
  737 #
  738 # Highpoint RocketRAID 182x.
  739 device          hptmv
  740 
  741 #
  742 # Highpoint DC7280 and R750.
  743 device          hptnr
  744 
  745 #
  746 # Highpoint RocketRAID.  Supports RR172x, RR222x, RR2240, RR232x, RR2340,
  747 # RR2210, RR174x, RR2522, RR231x, RR230x.
  748 device          hptrr
  749 
  750 #
  751 # Highpoint RocketRaid 3xxx series SATA RAID
  752 device          hptiop
  753 
  754 #
  755 # IBM (now Adaptec) ServeRAID controllers
  756 device          ips
  757 
  758 #
  759 # Intel C600 (Patsburg) integrated SAS controller
  760 device          isci
  761 options         ISCI_LOGGING    # enable debugging in isci HAL
  762 
  763 #
  764 # NVM Express (NVMe) support
  765 device         nvme    # base NVMe driver
  766 device         nvd     # expose NVMe namespaces as disks, depends on nvme
  767 
  768 #
  769 # PMC-Sierra SAS/SATA controller
  770 device          pmspcv
  771 #
  772 # SafeNet crypto driver: can be moved to the MI NOTES as soon as
  773 # it's tested on a big-endian machine
  774 #
  775 device          safe            # SafeNet 1141
  776 options         SAFE_DEBUG      # enable debugging support: hw.safe.debug
  777 options         SAFE_RNDTEST    # enable rndtest support
  778 
  779 #
  780 # glxiic is an I2C driver for the AMD Geode LX CS5536 System Management Bus
  781 # controller.  Requires 'device iicbus'.
  782 #
  783 device          glxiic          # AMD Geode LX CS5536 System Management Bus
  784 
  785 #
  786 # glxsb is a driver for the Security Block in AMD Geode LX processors.
  787 # Requires 'device crypto'.
  788 #
  789 device          glxsb           # AMD Geode LX Security Block
  790 
  791 #
  792 # VirtIO support
  793 #
  794 # The virtio entry provides a generic bus for use by the device drivers.
  795 # It must be combined with an interface that communicates with the host.
  796 # Multiple such interfaces defined by the VirtIO specification. FreeBSD
  797 # only has support for PCI. Therefore, virtio_pci must be statically
  798 # compiled in or loaded as a module for the device drivers to function.
  799 #
  800 device          virtio          # Generic VirtIO bus (required)
  801 device          virtio_pci      # VirtIO PCI Interface
  802 device          vtnet           # VirtIO Ethernet device
  803 device          virtio_blk      # VirtIO Block device
  804 device          virtio_scsi     # VirtIO SCSI device
  805 device          virtio_balloon  # VirtIO Memory Balloon device
  806 device          virtio_random   # VirtIO Entropy device
  807 device          virtio_console  # VirtIO Console device
  808 
  809 device          hyperv          # HyperV drivers
  810 
  811 #####################################################################
  812 
  813 #
  814 # Miscellaneous hardware:
  815 #
  816 # apm: Laptop Advanced Power Management (experimental)
  817 # ipmi: Intelligent Platform Management Interface
  818 # smapi: System Management Application Program Interface driver
  819 # smbios: DMI/SMBIOS entry point
  820 # vpd: Vital Product Data kernel interface
  821 # pmtimer: Adjust system timer at wakeup time
  822 # pbio: Parallel (8255 PPI) basic I/O (mode 0) port (e.g. Advantech PCL-724)
  823 # spic: Sony Programmable I/O controller (VAIO notebooks)
  824 # asmc: Apple System Management Controller
  825 # si: Specialix International SI/XIO or SX intelligent serial card driver
  826 # tpm: Trusted Platform Module
  827 
  828 # Notes on APM
  829 #  The flags takes the following meaning for apm0:
  830 #    0x0020  Statclock is broken.
  831 
  832 # Notes on the Specialix SI/XIO driver:
  833 #  The host card is memory, not IO mapped.
  834 #  The Rev 1 host cards use a 64K chunk, on a 32K boundary.
  835 #  The Rev 2 host cards use a 32K chunk, on a 32K boundary.
  836 #  The cards can use an IRQ of 11, 12 or 15.
  837 
  838 # Notes on the Sony Programmable I/O controller
  839 #  This is a temporary driver that should someday be replaced by something
  840 #  that hooks into the ACPI layer.  The device is hooked to the PIIX4's
  841 #  General Device 10 decoder, which means you have to fiddle with PCI
  842 #  registers to map it in, even though it is otherwise treated here as
  843 #  an ISA device.  At the moment, the driver polls, although the device
  844 #  is capable of generating interrupts.  It largely undocumented.
  845 #  The port location in the hint is where you WANT the device to be
  846 #  mapped.  0x10a0 seems to be traditional.  At the moment the jogdial
  847 #  is the only thing truly supported, but apparently a fair percentage
  848 #  of the Vaio extra features are controlled by this device.
  849 
  850 device          apm
  851 hint.apm.0.flags="0x20"
  852 device          ipmi
  853 device          smapi
  854 device          smbios
  855 device          vpd
  856 device          pmtimer
  857 device          pbio
  858 hint.pbio.0.at="isa"
  859 hint.pbio.0.port="0x360"
  860 device          spic
  861 hint.spic.0.at="isa"
  862 hint.spic.0.port="0x10a0"
  863 device          asmc
  864 #device         si
  865 device          tpm
  866 device          padlock_rng     # VIA Padlock RNG
  867 device          rdrand_rng      # Intel Bull Mountain RNG
  868 device          aesni           # AES-NI OpenCrypto module
  869 
  870 #
  871 # Laptop/Notebook options:
  872 #
  873 # See also:
  874 #  apm under `Miscellaneous hardware'
  875 # above.
  876 
  877 # For older notebooks that signal a powerfail condition (external
  878 # power supply dropped, or battery state low) by issuing an NMI:
  879 
  880 options         POWERFAIL_NMI   # make it beep instead of panicing
  881 
  882 #
  883 # I2C Bus
  884 #
  885 # Philips i2c bus support is provided by the `iicbus' device.
  886 #
  887 # Supported interfaces:
  888 # pcf   Philips PCF8584 ISA-bus controller
  889 #
  890 device          pcf
  891 hint.pcf.0.at="isa"
  892 hint.pcf.0.port="0x320"
  893 hint.pcf.0.irq="5"
  894 
  895 #
  896 # Hardware watchdog timers:
  897 #
  898 # ichwd: Intel ICH watchdog timer
  899 # amdsbwd: AMD SB7xx watchdog timer
  900 # viawd: VIA south bridge watchdog timer
  901 # wbwd: Winbond watchdog timer
  902 #
  903 device          ichwd
  904 device          amdsbwd
  905 device          viawd
  906 device          wbwd
  907 
  908 #
  909 # Temperature sensors:
  910 #
  911 # coretemp: on-die sensor on Intel Core and newer CPUs
  912 # amdtemp: on-die sensor on AMD K8/K10/K11 CPUs
  913 #
  914 device          coretemp
  915 device          amdtemp
  916 
  917 #
  918 # CPU control pseudo-device. Provides access to MSRs, CPUID info and
  919 # microcode update feature.
  920 #
  921 device          cpuctl
  922 
  923 #
  924 # System Management Bus (SMB)
  925 #
  926 options         ENABLE_ALART            # Control alarm on Intel intpm driver
  927 
  928 #
  929 # Set the number of PV entries per process.  Increasing this can
  930 # stop panics related to heavy use of shared memory.  However, that can
  931 # (combined with large amounts of physical memory) cause panics at
  932 # boot time due the kernel running out of VM space.
  933 #
  934 # If you're tweaking this, you might also want to increase the sysctls
  935 # "vm.v_free_min", "vm.v_free_reserved", and "vm.v_free_target".
  936 #
  937 # The value below is the one more than the default.
  938 #
  939 options         PMAP_SHPGPERPROC=201
  940 
  941 #
  942 # Change the size of the kernel virtual address space.  Due to
  943 # constraints in loader(8) on i386, this must be a multiple of 4.
  944 # 256 = 1 GB of kernel address space.  Increasing this also causes
  945 # a reduction of the address space in user processes.  512 splits
  946 # the 4GB cpu address space in half (2GB user, 2GB kernel).  For PAE
  947 # kernels, the value will need to be double non-PAE.  A value of 1024
  948 # for PAE kernels is necessary to split the address space in half.
  949 # This will likely need to be increased to handle memory sizes >4GB.
  950 # PAE kernels default to a value of 512.
  951 #
  952 options         KVA_PAGES=260
  953 
  954 #
  955 # Number of initial kernel page table pages used for early bootstrap.
  956 # This number should include enough pages to map the kernel, any
  957 # modules or other data loaded with the kernel by the loader, and data
  958 # structures allocated before the VM system is initialized such as the
  959 # vm_page_t array.  Each page table page maps 4MB (2MB with PAE).
  960 #
  961 options         NKPT=31
  962 
  963 
  964 #####################################################################
  965 # ABI Emulation
  966 
  967 # Enable iBCS2 runtime support for SCO and ISC binaries
  968 options         IBCS2
  969 
  970 # Emulate spx device for client side of SVR3 local X interface
  971 options         SPX_HACK
  972 
  973 # Enable Linux ABI emulation
  974 options         COMPAT_LINUX
  975 
  976 # Enable i386 a.out binary support
  977 options         COMPAT_AOUT
  978 
  979 # Enable the linux-like proc filesystem support (requires COMPAT_LINUX
  980 # and PSEUDOFS)
  981 options         LINPROCFS
  982 
  983 #Enable the linux-like sys filesystem support (requires COMPAT_LINUX
  984 # and PSEUDOFS)
  985 options         LINSYSFS
  986 
  987 #
  988 # SysVR4 ABI emulation
  989 #
  990 # The svr4 ABI emulator can be statically compiled into the kernel or loaded as
  991 # a KLD module.
  992 # The STREAMS network emulation code can also be compiled statically or as a
  993 # module.  If loaded as a module, it must be loaded before the svr4 module
  994 # (the /usr/sbin/svr4 script does this for you).  If compiling statically,
  995 # the `streams' device must be configured into any kernel which also
  996 # specifies COMPAT_SVR4.  It is possible to have a statically-configured
  997 # STREAMS device and a dynamically loadable svr4 emulator;  the /usr/sbin/svr4
  998 # script understands that it doesn't need to load the `streams' module under
  999 # those circumstances.
 1000 # Caveat:  At this time, `options KTRACE' is required for the svr4 emulator
 1001 # (whether static or dynamic).
 1002 #
 1003 options         COMPAT_SVR4     # build emulator statically
 1004 options         DEBUG_SVR4      # enable verbose debugging
 1005 device          streams         # STREAMS network driver (required for svr4).
 1006 
 1007 # Enable NDIS binary driver support
 1008 options         NDISAPI
 1009 device          ndis
 1010 
 1011 # Linux-specific pseudo devices support
 1012 device          lindev
 1013 
 1014 
 1015 #####################################################################
 1016 # VM OPTIONS
 1017 
 1018 # Disable the 4 MByte page PSE CPU feature.  The PSE feature allows the
 1019 # kernel to use 4 MByte pages to map the kernel instead of 4k pages.
 1020 # This saves on the amount of memory needed for page tables needed to
 1021 # map the kernel.  You should only disable this feature as a temporary
 1022 # workaround if you are having problems with it enabled.
 1023 #
 1024 #options        DISABLE_PSE
 1025 
 1026 # Disable the global pages PGE CPU feature.  The PGE feature allows pages
 1027 # to be marked with the PG_G bit.  TLB entries for these pages are not
 1028 # flushed from the cache when %cr3 is reloaded.  This can make context
 1029 # switches less expensive.  You should only disable this feature as a
 1030 # temporary workaround if you are having problems with it enabled.
 1031 #
 1032 #options        DISABLE_PG_G
 1033 
 1034 # KSTACK_PAGES is the number of memory pages to assign to the kernel
 1035 # stack of each thread.
 1036 
 1037 options         KSTACK_PAGES=3
 1038 
 1039 # Enable detailed accounting by the PV entry allocator.
 1040 
 1041 options         PV_STATS
 1042 
 1043 #####################################################################
 1044 
 1045 # More undocumented options for linting.
 1046 # Note that documenting these are not considered an affront.
 1047 
 1048 options         FB_INSTALL_CDEV         # install a CDEV entry in /dev
 1049 
 1050 options         I586_PMC_GUPROF=0x70000
 1051 options         KBDIO_DEBUG=2
 1052 options         KBD_MAXRETRY=4
 1053 options         KBD_MAXWAIT=6
 1054 options         KBD_RESETDELAY=201
 1055 
 1056 options         PSM_DEBUG=1
 1057 
 1058 options         TIMER_FREQ=((14318182+6)/12)
 1059 
 1060 options         VM_KMEM_SIZE
 1061 options         VM_KMEM_SIZE_MAX
 1062 options         VM_KMEM_SIZE_SCALE
 1063 
 1064 
 1065 # asr old ioctls support, needed by raidutils
 1066 
 1067 options         ASR_COMPAT
 1068 
 1069 # Module to enable execution of application via emulators like QEMU
 1070 options         IMAGACT_BINMISC

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