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/9.2/sys/i386/conf/NOTES 252903 2013-07-06 23:26:36Z delphij $
    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 
  495 # ACPI WMI Mapping driver
  496 device          acpi_wmi
  497 
  498 # ACPI Asus Extras (LCD backlight/brightness, video output, etc.)
  499 device          acpi_asus
  500 
  501 # ACPI Fujitsu Extras (Buttons)
  502 device          acpi_fujitsu
  503 
  504 # ACPI extras driver for HP laptops
  505 device          acpi_hp
  506 
  507 # ACPI extras driver for IBM laptops
  508 device          acpi_ibm
  509 
  510 # ACPI Panasonic Extras (LCD backlight/brightness, video output, etc.)
  511 device          acpi_panasonic
  512 
  513 # ACPI Sony extra (LCD brightness)
  514 device          acpi_sony
  515 
  516 # ACPI Toshiba Extras (LCD backlight/brightness, video output, etc.)
  517 device          acpi_toshiba
  518 
  519 # ACPI Video Extensions (LCD backlight/brightness, video output, etc.)
  520 device          acpi_video
  521 
  522 # ACPI Docking Station
  523 device          acpi_dock
  524 
  525 # ACPI ASOC ATK0110 ASUSTeK AI Booster (voltage, temperature and fan sensors)
  526 device          aibs
  527 
  528 # The cpufreq(4) driver provides support for non-ACPI CPU frequency control
  529 device          cpufreq
  530 
  531 # Direct Rendering modules for 3D acceleration.
  532 device          drm             # DRM core module required by DRM drivers
  533 device          i915drm         # Intel i830 through i915
  534 device          mach64drm       # ATI Rage Pro, Rage Mobility P/M, Rage XL
  535 device          mgadrm          # AGP Matrox G200, G400, G450, G550
  536 device          r128drm         # ATI Rage 128
  537 device          radeondrm       # ATI Radeon
  538 device          savagedrm       # S3 Savage3D, Savage4
  539 device          sisdrm          # SiS 300/305, 540, 630
  540 device          tdfxdrm         # 3dfx Voodoo 3/4/5 and Banshee
  541 device          viadrm          # VIA
  542 options         DRM_DEBUG       # Include debug printfs (slow)
  543 
  544 #
  545 # mse: Logitech and ATI InPort bus mouse ports
  546 
  547 device          mse
  548 hint.mse.0.at="isa"
  549 hint.mse.0.port="0x23c"
  550 hint.mse.0.irq="5"
  551 
  552 #
  553 # Network interfaces:
  554 #
  555 
  556 # ce:   Cronyx Tau-PCI/32 sync single/dual port G.703/E1 serial adaptor
  557 #       with 32 HDLC subchannels (requires sppp (default), or NETGRAPH if
  558 #       NETGRAPH_CRONYX is configured)
  559 # cp:   Cronyx Tau-PCI sync single/dual/four port
  560 #       V.35/RS-232/RS-530/RS-449/X.21/G.703/E1/E3/T3/STS-1
  561 #       serial adaptor (requires sppp (default), or NETGRAPH if
  562 #       NETGRAPH_CRONYX is configured)
  563 # cs:   IBM Etherjet and other Crystal Semi CS89x0-based adapters
  564 # ctau: Cronyx Tau sync dual port V.35/RS-232/RS-530/RS-449/X.21/G.703/E1
  565 #       serial adaptor (requires sppp (default), or NETGRAPH if
  566 #       NETGRAPH_CRONYX is configured)
  567 # ed:   Western Digital and SMC 80xx; Novell NE1000 and NE2000; 3Com 3C503
  568 #       HP PC Lan+, various PC Card devices
  569 #       (requires miibus)
  570 # ie:   AT&T StarLAN 10 and EN100; 3Com 3C507; unknown NI5210;
  571 #       Intel EtherExpress
  572 # ipw:  Intel PRO/Wireless 2100 IEEE 802.11 adapter
  573 # iwi:  Intel PRO/Wireless 2200BG/2225BG/2915ABG IEEE 802.11 adapters
  574 #       Requires the iwi firmware module
  575 # iwn:  Intel Wireless WiFi Link 4965AGN 802.11 network adapters
  576 #       Requires the iwn firmware module
  577 # mlx4ib: Mellanox ConnectX HCA InfiniBand
  578 # mlxen: Mellanox ConnectX HCA Ethernet
  579 # mthca: Mellanox HCA InfiniBand
  580 # mwl:  Marvell 88W8363 IEEE 802.11 adapter
  581 #       Requires the mwl firmware module
  582 # nfe:  nVidia nForce MCP on-board Ethernet Networking (BSD open source)
  583 # nve:  nVidia nForce MCP on-board Ethernet Networking
  584 # sbni: Granch SBNI12-xx ISA and PCI adapters
  585 # wl:   Lucent Wavelan (ISA card only).
  586 # wpi:  Intel 3945ABG Wireless LAN controller
  587 #       Requires the wpi firmware module
  588 
  589 # Order for ISA/EISA devices is important here
  590 
  591 device          ce
  592 device          cp
  593 device          cs              # Crystal Semiconductor CS89x0 NIC
  594 hint.cs.0.at="isa"
  595 hint.cs.0.port="0x300"
  596 device          ctau
  597 hint.ctau.0.at="isa"
  598 hint.ctau.0.port="0x240"
  599 hint.ctau.0.irq="15"
  600 hint.ctau.0.drq="7"
  601 #options        NETGRAPH_CRONYX         # Enable NETGRAPH support for Cronyx adapter(s)
  602 device          ed              # NE[12]000, SMC Ultra, 3c503, DS8390 cards
  603 options         ED_3C503
  604 options         ED_HPP
  605 options         ED_SIC
  606 hint.ed.0.at="isa"
  607 hint.ed.0.port="0x280"
  608 hint.ed.0.irq="5"
  609 hint.ed.0.maddr="0xd8000"
  610 device          ie              # EtherExpress 8/16, 3C507, StarLAN 10 etc.
  611 # Hints only required for Starlan
  612 hint.ie.2.at="isa"
  613 hint.ie.2.port="0x300"
  614 hint.ie.2.irq="5"
  615 hint.ie.2.maddr="0xd0000"
  616 device          ipw             # Intel 2100 wireless NICs.
  617 device          iwi             # Intel 2200BG/2225BG/2915ABG wireless NICs.
  618 device          iwn             # Intel 4965/1000/5000/6000 wireless NICs.
  619 # Hint for the i386-only ISA front-end of le(4).
  620 hint.le.0.at="isa"
  621 hint.le.0.port="0x280"
  622 hint.le.0.irq="10"
  623 hint.le.0.drq="0"
  624 device          mlx4ib          # Mellanox ConnectX HCA InfiniBand
  625 device          mlxen           # Mellanox ConnectX HCA Ethernet
  626 device          mthca           # Mellanox HCA InfiniBand
  627 device          mwl             # Marvell 88W8363 802.11n wireless NICs.
  628 device          nfe             # nVidia nForce MCP on-board Ethernet
  629 device          nve             # nVidia nForce MCP on-board Ethernet Networking
  630 device          sbni
  631 hint.sbni.0.at="isa"
  632 hint.sbni.0.port="0x210"
  633 hint.sbni.0.irq="0xefdead"
  634 hint.sbni.0.flags="0"
  635 device          wl
  636 hint.wl.0.at="isa"
  637 hint.wl.0.port="0x300"
  638 options         WLCACHE         # enables the signal-strength cache
  639 options         WLDEBUG         # enables verbose debugging output
  640 device          wpi             # Intel 3945ABG wireless NICs.
  641 
  642 # IEEE 802.11 adapter firmware modules
  643 
  644 # Intel PRO/Wireless 2100 firmware:
  645 #   ipwfw:              BSS/IBSS/monitor mode firmware
  646 #   ipwbssfw:           BSS mode firmware
  647 #   ipwibssfw:          IBSS mode firmware
  648 #   ipwmonitorfw:       Monitor mode firmware
  649 # Intel PRO/Wireless 2200BG/2225BG/2915ABG firmware:
  650 #   iwifw:              BSS/IBSS/monitor mode firmware
  651 #   iwibssfw:           BSS mode firmware
  652 #   iwiibssfw:          IBSS mode firmware
  653 #   iwimonitorfw:       Monitor mode firmware
  654 # Intel Wireless WiFi Link 4965/1000/5000/6000 series firmware:
  655 #   iwnfw:              Single module to support the 4965/1000/5000/5150/6000
  656 #   iwn4965fw:          Specific module for the 4965 only
  657 #   iwn1000fw:          Specific module for the 1000 only
  658 #   iwn5000fw:          Specific module for the 5000 only
  659 #   iwn5150fw:          Specific module for the 5150 only
  660 #   iwn6000fw:          Specific module for the 6000 only
  661 #   iwn6050fw:          Specific module for the 6050 only
  662 # mwlfw:        Marvell 88W8363 firmware
  663 # wpifw:        Intel 3945ABG Wireless LAN Controller firmware
  664 
  665 device          iwifw
  666 device          iwibssfw
  667 device          iwiibssfw
  668 device          iwimonitorfw
  669 device          ipwfw
  670 device          ipwbssfw
  671 device          ipwibssfw
  672 device          ipwmonitorfw
  673 device          iwnfw
  674 device          iwn4965fw
  675 device          iwn1000fw
  676 device          iwn5000fw
  677 device          iwn5150fw
  678 device          iwn6000fw
  679 device          iwn6050fw
  680 device          mwlfw
  681 device          wpifw
  682 
  683 #
  684 # ATA raid adapters
  685 #
  686 device          pst
  687 
  688 #
  689 # Areca 11xx and 12xx series of SATA II RAID controllers.
  690 # CAM is required.
  691 #
  692 device          arcmsr          # Areca SATA II RAID
  693 
  694 #
  695 # 3ware 9000 series PATA/SATA RAID controller driver and options.
  696 # The driver is implemented as a SIM, and so, needs the CAM infrastructure.
  697 #
  698 options         TWA_DEBUG               # 0-10; 10 prints the most messages.
  699 options         TWA_FLASH_FIRMWARE      # firmware image bundled when defined.
  700 device          twa                     # 3ware 9000 series PATA/SATA RAID
  701 
  702 #
  703 # SCSI host adapters:
  704 #
  705 # ncv: NCR 53C500 based SCSI host adapters.
  706 # nsp: Workbit Ninja SCSI-3 based PC Card SCSI host adapters.
  707 # stg: TMC 18C30, 18C50 based SCSI host adapters.
  708 
  709 device          ncv
  710 device          nsp
  711 device          stg
  712 hint.stg.0.at="isa"
  713 hint.stg.0.port="0x140"
  714 hint.stg.0.port="11"
  715 
  716 #
  717 # Adaptec FSA RAID controllers, including integrated DELL controllers,
  718 # the Dell PERC 2/QC and the HP NetRAID-4M
  719 device          aac
  720 device          aacp    # SCSI Passthrough interface (optional, CAM required)
  721 
  722 #
  723 # Adaptec by PMC RAID controllers, Series 6/7/8 and upcoming families
  724 device          aacraid         # Container interface, CAM required
  725 
  726 # The 'asr' driver provides support for current DPT/Adaptec SCSI RAID
  727 # controllers (SmartRAID V and VI and later).
  728 # These controllers require the CAM infrastructure.
  729 #
  730 device          asr
  731 
  732 #
  733 # Highpoint RocketRAID 27xx.
  734 device          hpt27xx
  735 
  736 #
  737 # Highpoint RocketRAID 182x.
  738 device          hptmv
  739 
  740 #
  741 # Highpoint DC7280 and R750.
  742 device          hptnr
  743 
  744 #
  745 # Highpoint RocketRAID.  Supports RR172x, RR222x, RR2240, RR232x, RR2340,
  746 # RR2210, RR174x, RR2522, RR231x, RR230x.
  747 device          hptrr
  748 
  749 #
  750 # Highpoint RocketRaid 3xxx series SATA RAID
  751 device          hptiop
  752 
  753 #
  754 # IBM (now Adaptec) ServeRAID controllers
  755 device          ips
  756 
  757 #
  758 # Intel C600 (Patsburg) integrated SAS controller
  759 device          isci
  760 options         ISCI_LOGGING    # enable debugging in isci HAL
  761 
  762 #
  763 # NVM Express (NVMe) support
  764 device         nvme    # base NVMe driver
  765 device         nvd     # expose NVMe namespaces as disks, depends on nvme
  766 
  767 #
  768 # SafeNet crypto driver: can be moved to the MI NOTES as soon as
  769 # it's tested on a big-endian machine
  770 #
  771 device          safe            # SafeNet 1141
  772 options         SAFE_DEBUG      # enable debugging support: hw.safe.debug
  773 options         SAFE_RNDTEST    # enable rndtest support
  774 
  775 #
  776 # glxiic is an I2C driver for the AMD Geode LX CS5536 System Management Bus
  777 # controller.  Requires 'device iicbus'.
  778 #
  779 device          glxiic          # AMD Geode LX CS5536 System Management Bus
  780 
  781 #
  782 # glxsb is a driver for the Security Block in AMD Geode LX processors.
  783 # Requires 'device crypto'.
  784 #
  785 device          glxsb           # AMD Geode LX Security Block
  786 
  787 #
  788 # VirtIO support
  789 #
  790 # The virtio entry provides a generic bus for use by the device drivers.
  791 # It must be combined with an interface that communicates with the host.
  792 # Multiple such interfaces defined by the VirtIO specification. FreeBSD
  793 # only has support for PCI. Therefore, virtio_pci must be statically
  794 # compiled in or loaded as a module for the device drivers to function.
  795 #
  796 device          virtio          # Generic VirtIO bus (required)
  797 device          virtio_pci      # VirtIO PCI Interface
  798 device          vtnet           # VirtIO Ethernet device
  799 device          virtio_blk      # VirtIO Block device
  800 device          virtio_scsi     # VirtIO SCSI device
  801 device          virtio_balloon  # VirtIO Memory Balloon device
  802 
  803 #####################################################################
  804 
  805 #
  806 # Miscellaneous hardware:
  807 #
  808 # apm: Laptop Advanced Power Management (experimental)
  809 # ipmi: Intelligent Platform Management Interface
  810 # smapi: System Management Application Program Interface driver
  811 # smbios: DMI/SMBIOS entry point
  812 # vpd: Vital Product Data kernel interface
  813 # pmtimer: Adjust system timer at wakeup time
  814 # pbio: Parallel (8255 PPI) basic I/O (mode 0) port (e.g. Advantech PCL-724)
  815 # spic: Sony Programmable I/O controller (VAIO notebooks)
  816 # asmc: Apple System Management Controller
  817 # si: Specialix International SI/XIO or SX intelligent serial card driver
  818 # tpm: Trusted Platform Module
  819 
  820 # Notes on APM
  821 #  The flags takes the following meaning for apm0:
  822 #    0x0020  Statclock is broken.
  823 
  824 # Notes on the Specialix SI/XIO driver:
  825 #  The host card is memory, not IO mapped.
  826 #  The Rev 1 host cards use a 64K chunk, on a 32K boundary.
  827 #  The Rev 2 host cards use a 32K chunk, on a 32K boundary.
  828 #  The cards can use an IRQ of 11, 12 or 15.
  829 
  830 # Notes on the Sony Programmable I/O controller
  831 #  This is a temporary driver that should someday be replaced by something
  832 #  that hooks into the ACPI layer.  The device is hooked to the PIIX4's
  833 #  General Device 10 decoder, which means you have to fiddle with PCI
  834 #  registers to map it in, even though it is otherwise treated here as
  835 #  an ISA device.  At the moment, the driver polls, although the device
  836 #  is capable of generating interrupts.  It largely undocumented.
  837 #  The port location in the hint is where you WANT the device to be
  838 #  mapped.  0x10a0 seems to be traditional.  At the moment the jogdial
  839 #  is the only thing truly supported, but apparently a fair percentage
  840 #  of the Vaio extra features are controlled by this device.
  841 
  842 device          apm
  843 hint.apm.0.flags="0x20"
  844 device          ipmi
  845 device          smapi
  846 device          smbios
  847 device          vpd
  848 device          pmtimer
  849 device          pbio
  850 hint.pbio.0.at="isa"
  851 hint.pbio.0.port="0x360"
  852 device          spic
  853 hint.spic.0.at="isa"
  854 hint.spic.0.port="0x10a0"
  855 device          asmc
  856 #device         si
  857 device          tpm
  858 
  859 #
  860 # Laptop/Notebook options:
  861 #
  862 # See also:
  863 #  apm under `Miscellaneous hardware'
  864 # above.
  865 
  866 # For older notebooks that signal a powerfail condition (external
  867 # power supply dropped, or battery state low) by issuing an NMI:
  868 
  869 options         POWERFAIL_NMI   # make it beep instead of panicing
  870 
  871 #
  872 # I2C Bus
  873 #
  874 # Philips i2c bus support is provided by the `iicbus' device.
  875 #
  876 # Supported interfaces:
  877 # pcf   Philips PCF8584 ISA-bus controller
  878 #
  879 device          pcf
  880 hint.pcf.0.at="isa"
  881 hint.pcf.0.port="0x320"
  882 hint.pcf.0.irq="5"
  883 
  884 #
  885 # Hardware watchdog timers:
  886 #
  887 # ichwd: Intel ICH watchdog timer
  888 # amdsbwd: AMD SB7xx watchdog timer
  889 # wbwd: Winbond watchdog timer
  890 #
  891 device          ichwd
  892 device          amdsbwd
  893 device          viawd
  894 device          wbwd
  895 
  896 #
  897 # Temperature sensors:
  898 #
  899 # coretemp: on-die sensor on Intel Core and newer CPUs
  900 # amdtemp: on-die sensor on AMD K8/K10/K11 CPUs
  901 #
  902 device          coretemp
  903 device          amdtemp
  904 
  905 #
  906 # CPU control pseudo-device. Provides access to MSRs, CPUID info and
  907 # microcode update feature.
  908 #
  909 device          cpuctl
  910 
  911 #
  912 # System Management Bus (SMB)
  913 #
  914 options         ENABLE_ALART            # Control alarm on Intel intpm driver
  915 
  916 #
  917 # Set the number of PV entries per process.  Increasing this can
  918 # stop panics related to heavy use of shared memory.  However, that can
  919 # (combined with large amounts of physical memory) cause panics at
  920 # boot time due the kernel running out of VM space.
  921 #
  922 # If you're tweaking this, you might also want to increase the sysctls
  923 # "vm.v_free_min", "vm.v_free_reserved", and "vm.v_free_target".
  924 #
  925 # The value below is the one more than the default.
  926 #
  927 options         PMAP_SHPGPERPROC=201
  928 
  929 #
  930 # Change the size of the kernel virtual address space.  Due to
  931 # constraints in loader(8) on i386, this must be a multiple of 4.
  932 # 256 = 1 GB of kernel address space.  Increasing this also causes
  933 # a reduction of the address space in user processes.  512 splits
  934 # the 4GB cpu address space in half (2GB user, 2GB kernel).  For PAE
  935 # kernels, the value will need to be double non-PAE.  A value of 1024
  936 # for PAE kernels is necessary to split the address space in half.
  937 # This will likely need to be increased to handle memory sizes >4GB.
  938 # PAE kernels default to a value of 512.
  939 #
  940 options         KVA_PAGES=260
  941 
  942 #
  943 # Number of initial kernel page table pages used for early bootstrap.
  944 # This number should include enough pages to map the kernel, any
  945 # modules or other data loaded with the kernel by the loader, and data
  946 # structures allocated before the VM system is initialized such as the
  947 # vm_page_t array.  Each page table page maps 4MB (2MB with PAE).
  948 #
  949 options         NKPT=31
  950 
  951 
  952 #####################################################################
  953 # ABI Emulation
  954 
  955 # Enable iBCS2 runtime support for SCO and ISC binaries
  956 options         IBCS2
  957 
  958 # Emulate spx device for client side of SVR3 local X interface
  959 options         SPX_HACK
  960 
  961 # Enable Linux ABI emulation
  962 options         COMPAT_LINUX
  963 
  964 # Enable i386 a.out binary support
  965 options         COMPAT_AOUT
  966 
  967 # Enable the linux-like proc filesystem support (requires COMPAT_LINUX
  968 # and PSEUDOFS)
  969 options         LINPROCFS
  970 
  971 #Enable the linux-like sys filesystem support (requires COMPAT_LINUX
  972 # and PSEUDOFS)
  973 options         LINSYSFS
  974 
  975 #
  976 # SysVR4 ABI emulation
  977 #
  978 # The svr4 ABI emulator can be statically compiled into the kernel or loaded as
  979 # a KLD module.
  980 # The STREAMS network emulation code can also be compiled statically or as a
  981 # module.  If loaded as a module, it must be loaded before the svr4 module
  982 # (the /usr/sbin/svr4 script does this for you).  If compiling statically,
  983 # the `streams' device must be configured into any kernel which also
  984 # specifies COMPAT_SVR4.  It is possible to have a statically-configured
  985 # STREAMS device and a dynamically loadable svr4 emulator;  the /usr/sbin/svr4
  986 # script understands that it doesn't need to load the `streams' module under
  987 # those circumstances.
  988 # Caveat:  At this time, `options KTRACE' is required for the svr4 emulator
  989 # (whether static or dynamic).
  990 #
  991 options         COMPAT_SVR4     # build emulator statically
  992 options         DEBUG_SVR4      # enable verbose debugging
  993 device          streams         # STREAMS network driver (required for svr4).
  994 
  995 # Enable NDIS binary driver support
  996 options         NDISAPI
  997 device          ndis
  998 
  999 # Linux-specific pseudo devices support
 1000 device          lindev
 1001 
 1002 
 1003 #####################################################################
 1004 # VM OPTIONS
 1005 
 1006 # Disable the 4 MByte page PSE CPU feature.  The PSE feature allows the
 1007 # kernel to use 4 MByte pages to map the kernel instead of 4k pages.
 1008 # This saves on the amount of memory needed for page tables needed to
 1009 # map the kernel.  You should only disable this feature as a temporary
 1010 # workaround if you are having problems with it enabled.
 1011 #
 1012 #options        DISABLE_PSE
 1013 
 1014 # Disable the global pages PGE CPU feature.  The PGE feature allows pages
 1015 # to be marked with the PG_G bit.  TLB entries for these pages are not
 1016 # flushed from the cache when %cr3 is reloaded.  This can make context
 1017 # switches less expensive.  You should only disable this feature as a
 1018 # temporary workaround if you are having problems with it enabled.
 1019 #
 1020 #options        DISABLE_PG_G
 1021 
 1022 # KSTACK_PAGES is the number of memory pages to assign to the kernel
 1023 # stack of each thread.
 1024 
 1025 options         KSTACK_PAGES=3
 1026 
 1027 # Enable detailed accounting by the PV entry allocator.
 1028 
 1029 options         PV_STATS
 1030 
 1031 #####################################################################
 1032 
 1033 # More undocumented options for linting.
 1034 # Note that documenting these are not considered an affront.
 1035 
 1036 options         FB_INSTALL_CDEV         # install a CDEV entry in /dev
 1037 
 1038 options         I586_PMC_GUPROF=0x70000
 1039 options         KBDIO_DEBUG=2
 1040 options         KBD_MAXRETRY=4
 1041 options         KBD_MAXWAIT=6
 1042 options         KBD_RESETDELAY=201
 1043 
 1044 options         PSM_DEBUG=1
 1045 
 1046 options         TIMER_FREQ=((14318182+6)/12)
 1047 
 1048 options         VM_KMEM_SIZE
 1049 options         VM_KMEM_SIZE_MAX
 1050 options         VM_KMEM_SIZE_SCALE
 1051 
 1052 
 1053 # asr old ioctls support, needed by raidutils
 1054 
 1055 options         ASR_COMPAT

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