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/11.2/sys/i386/conf/NOTES 331769 2018-03-30 18:06:29Z hselasky $
    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 # DTrace core
   21 # NOTE: introduces CDDL-licensed components into the kernel
   22 #device         dtrace
   23 
   24 # DTrace modules
   25 #device         dtrace_profile
   26 #device         dtrace_sdt
   27 #device         dtrace_fbt
   28 #device         dtrace_systrace
   29 #device         dtrace_prototype
   30 #device         dtnfscl
   31 #device         dtmalloc
   32 
   33 # Alternatively include all the DTrace modules
   34 #device         dtraceall
   35 
   36 
   37 #####################################################################
   38 # SMP OPTIONS:
   39 #
   40 # The apic device enables the use of the I/O APIC for interrupt delivery.
   41 # The apic device can be used in both UP and SMP kernels, but is required
   42 # for SMP kernels.  Thus, the apic device is not strictly an SMP option,
   43 # but it is a prerequisite for SMP.
   44 #
   45 # Notes:
   46 #
   47 # HTT CPUs should only be used if they are enabled in the BIOS.  For
   48 # the ACPI case, ACPI only correctly tells us about any HTT CPUs if
   49 # they are enabled.  However, most HTT systems do not list HTT CPUs
   50 # in the MP Table if they are enabled, thus we guess at the HTT CPUs
   51 # for the MP Table case.  However, we shouldn't try to guess and use
   52 # these CPUs if HTT is disabled.  Thus, HTT guessing is only enabled
   53 # for the MP Table if the user explicitly asks for it via the
   54 # MPTABLE_FORCE_HTT option.  Do NOT use this option if you have HTT
   55 # disabled in your BIOS.
   56 #
   57 # IPI_PREEMPTION instructs the kernel to preempt threads running on other
   58 # CPUS if needed.  Relies on the PREEMPTION option
   59 
   60 # Mandatory:
   61 device          apic                    # I/O apic
   62 
   63 # Optional:
   64 options         MPTABLE_FORCE_HTT       # Enable HTT CPUs with the MP Table
   65 options         IPI_PREEMPTION
   66 
   67 #
   68 # Watchdog routines.
   69 #
   70 options         MP_WATCHDOG
   71 
   72 # Debugging options.
   73 #
   74 options         COUNT_XINVLTLB_HITS     # Counters for TLB events
   75 options         COUNT_IPIS              # Per-CPU IPI interrupt counters
   76 
   77 
   78 
   79 #####################################################################
   80 # CPU OPTIONS
   81 
   82 #
   83 # You must specify at least one CPU (the one you intend to run on);
   84 # deleting the specification for CPUs you don't need to use may make
   85 # parts of the system run faster.
   86 #
   87 cpu             I486_CPU
   88 cpu             I586_CPU                # aka Pentium(tm)
   89 cpu             I686_CPU                # aka Pentium Pro(tm)
   90 
   91 #
   92 # Options for CPU features.
   93 #
   94 # CPU_ATHLON_SSE_HACK tries to enable SSE instructions when the BIOS has
   95 # forgotten to enable them.
   96 #
   97 # CPU_BLUELIGHTNING_3X enables triple-clock mode on IBM Blue Lightning
   98 # CPU if CPU supports it.  The default is double-clock mode on
   99 # BlueLightning CPU box.
  100 #
  101 # CPU_BLUELIGHTNING_FPU_OP_CACHE enables FPU operand cache on IBM
  102 # BlueLightning CPU.  It works only with Cyrix FPU, and this option
  103 # should not be used with Intel FPU.
  104 #
  105 # CPU_BTB_EN enables branch target buffer on Cyrix 5x86 (NOTE 1).
  106 #
  107 # CPU_CYRIX_NO_LOCK enables weak locking for the entire address space
  108 # of Cyrix 6x86 and 6x86MX CPUs by setting the NO_LOCK bit of CCR1.
  109 # Otherwise, the NO_LOCK bit of CCR1 is cleared.  (NOTE 3)
  110 #
  111 # CPU_DIRECT_MAPPED_CACHE sets L1 cache of Cyrix 486DLC CPU in direct
  112 # mapped mode.  Default is 2-way set associative mode.
  113 #
  114 # CPU_DISABLE_5X86_LSSER disables load store serialize (i.e., enables
  115 # reorder).  This option should not be used if you use memory mapped
  116 # I/O device(s).
  117 #
  118 # CPU_ELAN enables support for AMDs ElanSC520 CPU.
  119 #    CPU_ELAN_PPS enables precision timestamp code.
  120 #    CPU_ELAN_XTAL sets the clock crystal frequency in Hz.
  121 #
  122 # CPU_ENABLE_LONGRUN enables support for Transmeta Crusoe LongRun
  123 # technology which allows to restrict power consumption of the CPU by
  124 # using group of hw.crusoe.* sysctls.
  125 #
  126 # CPU_FASTER_5X86_FPU enables faster FPU exception handler.
  127 #
  128 # CPU_GEODE is for the SC1100 Geode embedded processor.  This option
  129 # is necessary because the i8254 timecounter is toast.
  130 #
  131 # CPU_I486_ON_386 enables CPU cache on i486 based CPU upgrade products
  132 # for i386 machines.
  133 #
  134 # CPU_IORT defines I/O clock delay time (NOTE 1).  Default values of
  135 # I/O clock delay time on Cyrix 5x86 and 6x86 are 0 and 7,respectively
  136 # (no clock delay).
  137 #
  138 # CPU_L2_LATENCY specifies the L2 cache latency value.  This option is used
  139 # only when CPU_PPRO2CELERON is defined and Mendocino Celeron is detected.
  140 # The default value is 5.
  141 #
  142 # CPU_LOOP_EN prevents flushing the prefetch buffer if the destination
  143 # of a jump is already present in the prefetch buffer on Cyrix 5x86(NOTE
  144 # 1).
  145 #
  146 # CPU_PPRO2CELERON enables L2 cache of Mendocino Celeron CPUs.  This option
  147 # is useful when you use Socket 8 to Socket 370 converter, because most Pentium
  148 # Pro BIOSs do not enable L2 cache of Mendocino Celeron CPUs.
  149 #
  150 # CPU_RSTK_EN enables return stack on Cyrix 5x86 (NOTE 1).
  151 #
  152 # CPU_SOEKRIS enables support www.soekris.com hardware.
  153 #
  154 # CPU_SUSP_HLT enables suspend on HALT.  If this option is set, CPU
  155 # enters suspend mode following execution of HALT instruction.
  156 #
  157 # CPU_UPGRADE_HW_CACHE eliminates unneeded cache flush instruction(s).
  158 #
  159 # CPU_WT_ALLOC enables write allocation on Cyrix 6x86/6x86MX and AMD
  160 # K5/K6/K6-2 CPUs.
  161 #
  162 # CYRIX_CACHE_WORKS enables CPU cache on Cyrix 486 CPUs with cache
  163 # flush at hold state.
  164 #
  165 # CYRIX_CACHE_REALLY_WORKS enables (1) CPU cache on Cyrix 486 CPUs
  166 # without cache flush at hold state, and (2) write-back CPU cache on
  167 # Cyrix 6x86 whose revision < 2.7 (NOTE 2).
  168 #
  169 # NO_F00F_HACK disables the hack that prevents Pentiums (and ONLY
  170 # Pentiums) from locking up when a LOCK CMPXCHG8B instruction is
  171 # executed.  This option is only needed if I586_CPU is also defined,
  172 # and should be included for any non-Pentium CPU that defines it.
  173 #
  174 # NO_MEMORY_HOLE is an optimisation for systems with AMD K6 processors
  175 # which indicates that the 15-16MB range is *definitely* not being
  176 # occupied by an ISA memory hole.
  177 #
  178 # NOTE 1: The options, CPU_BTB_EN, CPU_LOOP_EN, CPU_IORT,
  179 # CPU_LOOP_EN and CPU_RSTK_EN should not be used because of CPU bugs.
  180 # These options may crash your system.
  181 #
  182 # NOTE 2: If CYRIX_CACHE_REALLY_WORKS is not set, CPU cache is enabled
  183 # in write-through mode when revision < 2.7.  If revision of Cyrix
  184 # 6x86 >= 2.7, CPU cache is always enabled in write-back mode.
  185 #
  186 # NOTE 3: This option may cause failures for software that requires
  187 # locked cycles in order to operate correctly.
  188 #
  189 options         CPU_ATHLON_SSE_HACK
  190 options         CPU_BLUELIGHTNING_3X
  191 options         CPU_BLUELIGHTNING_FPU_OP_CACHE
  192 options         CPU_BTB_EN
  193 options         CPU_DIRECT_MAPPED_CACHE
  194 options         CPU_DISABLE_5X86_LSSER
  195 options         CPU_ELAN
  196 options         CPU_ELAN_PPS
  197 options         CPU_ELAN_XTAL=32768000
  198 options         CPU_ENABLE_LONGRUN
  199 options         CPU_FASTER_5X86_FPU
  200 options         CPU_GEODE
  201 options         CPU_I486_ON_386
  202 options         CPU_IORT
  203 options         CPU_L2_LATENCY=5
  204 options         CPU_LOOP_EN
  205 options         CPU_PPRO2CELERON
  206 options         CPU_RSTK_EN
  207 options         CPU_SOEKRIS
  208 options         CPU_SUSP_HLT
  209 options         CPU_UPGRADE_HW_CACHE
  210 options         CPU_WT_ALLOC
  211 options         CYRIX_CACHE_WORKS
  212 options         CYRIX_CACHE_REALLY_WORKS
  213 #options        NO_F00F_HACK
  214 
  215 # Debug options
  216 options         NPX_DEBUG       # enable npx debugging
  217 
  218 #
  219 # PERFMON causes the driver for Pentium/Pentium Pro performance counters
  220 # to be compiled.  See perfmon(4) for more information.
  221 #
  222 options         PERFMON
  223 
  224 #
  225 # XBOX causes the kernel to be bootable on the Microsoft XBox console system.
  226 # The resulting kernel will auto-detect whether it is being booted on a XBox,
  227 # so kernels compiled with this option will also work on an ordinary PC.
  228 # This option require I686_CPU.
  229 #
  230 # xboxfb includes support for the XBox frame buffer device. It is fully USB-
  231 # keyboard aware, and will only be used if an xbox is detected. This option
  232 # (obviously) requires XBOX support in your kernel.
  233 #
  234 # NOTE: xboxfb currently conflicts with syscons(4); if you have an XBOX and
  235 # include both in your kernel; you will not get any video output. Ordinary
  236 # PC's do not suffer from this.
  237 #
  238 options         XBOX
  239 device          xboxfb
  240 
  241 
  242 #####################################################################
  243 # NETWORKING OPTIONS
  244 
  245 #
  246 # DEVICE_POLLING adds support for mixed interrupt-polling handling
  247 # of network device drivers, which has significant benefits in terms
  248 # of robustness to overloads and responsivity, as well as permitting
  249 # accurate scheduling of the CPU time between kernel network processing
  250 # and other activities.  The drawback is a moderate (up to 1/HZ seconds)
  251 # potential increase in response times.
  252 # It is strongly recommended to use HZ=1000 or 2000 with DEVICE_POLLING
  253 # to achieve smoother behaviour.
  254 # Additionally, you can enable/disable polling at runtime with help of
  255 # the ifconfig(8) utility, and select the CPU fraction reserved to
  256 # userland with the sysctl variable kern.polling.user_frac
  257 # (default 50, range 0..100).
  258 #
  259 # Not all device drivers support this mode of operation at the time of
  260 # this writing.  See polling(4) for more details.
  261 
  262 options         DEVICE_POLLING
  263 
  264 # BPF_JITTER adds support for BPF just-in-time compiler.
  265 
  266 options         BPF_JITTER
  267 
  268 # OpenFabrics Enterprise Distribution (Infiniband).
  269 options         OFED
  270 options         OFED_DEBUG_INIT
  271 
  272 # Sockets Direct Protocol
  273 options         SDP
  274 options         SDP_DEBUG
  275 
  276 # IP over Infiniband
  277 options         IPOIB
  278 options         IPOIB_DEBUG
  279 options         IPOIB_CM
  280 
  281 
  282 #####################################################################
  283 # CLOCK OPTIONS
  284 
  285 # Provide read/write access to the memory in the clock chip.
  286 device          nvram           # Access to rtc cmos via /dev/nvram
  287 
  288 
  289 #####################################################################
  290 # MISCELLANEOUS DEVICES AND OPTIONS
  291 
  292 device          speaker         #Play IBM BASIC-style noises out your speaker
  293 hint.speaker.0.at="isa"
  294 hint.speaker.0.port="0x61"
  295 device          gzip            #Exec gzipped a.out's.  REQUIRES COMPAT_AOUT!
  296 device          apm_saver       # Requires APM
  297 
  298 
  299 #####################################################################
  300 # HARDWARE BUS CONFIGURATION
  301 
  302 #
  303 # ISA bus
  304 #
  305 device          isa
  306 
  307 #
  308 # Options for `isa':
  309 #
  310 # AUTO_EOI_1 enables the `automatic EOI' feature for the master 8259A
  311 # interrupt controller.  This saves about 0.7-1.25 usec for each interrupt.
  312 # This option breaks suspend/resume on some portables.
  313 #
  314 # AUTO_EOI_2 enables the `automatic EOI' feature for the slave 8259A
  315 # interrupt controller.  This saves about 0.7-1.25 usec for each interrupt.
  316 # Automatic EOI is documented not to work for for the slave with the
  317 # original i8259A, but it works for some clones and some integrated
  318 # versions.
  319 #
  320 # MAXMEM specifies the amount of RAM on the machine; if this is not
  321 # specified, FreeBSD will first read the amount of memory from the CMOS
  322 # RAM, so the amount of memory will initially be limited to 64MB or 16MB
  323 # depending on the BIOS.  If the BIOS reports 64MB, a memory probe will
  324 # then attempt to detect the installed amount of RAM.  If this probe
  325 # fails to detect >64MB RAM you will have to use the MAXMEM option.
  326 # The amount is in kilobytes, so for a machine with 128MB of RAM, it would
  327 # be 131072 (128 * 1024).
  328 #
  329 # BROKEN_KEYBOARD_RESET disables the use of the keyboard controller to
  330 # reset the CPU for reboot.  This is needed on some systems with broken
  331 # keyboard controllers.
  332 
  333 options         AUTO_EOI_1
  334 #options        AUTO_EOI_2
  335 
  336 options         MAXMEM=(128*1024)
  337 #options        BROKEN_KEYBOARD_RESET
  338 
  339 #
  340 # EISA bus
  341 #
  342 # The EISA bus device is `eisa'.  It provides auto-detection and
  343 # configuration support for all devices on the EISA bus.
  344 
  345 device          eisa
  346 
  347 # By default, only 10 EISA slots are probed, since the slot numbers
  348 # above clash with the configuration address space of the PCI subsystem,
  349 # and the EISA probe is not very smart about this.  This is sufficient
  350 # for most machines, but in particular the HP NetServer LC series comes
  351 # with an onboard AIC7770 dual-channel SCSI controller on EISA slot #11,
  352 # thus you need to bump this figure to 12 for them.
  353 options         EISA_SLOTS=12
  354 
  355 #
  356 # MCA bus:
  357 #
  358 # The MCA bus device is `mca'.  It provides auto-detection and
  359 # configuration support for all devices on the MCA bus.
  360 # No hints are required for MCA.
  361 
  362 device          mca
  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 # Hints for the non-optional Numeric Processing eXtension driver.
  388 hint.npx.0.flags="0x0"
  389 hint.npx.0.irq="13"
  390 
  391 #
  392 # `flags' for npx0:
  393 #       0x01    don't use the npx registers to optimize bcopy.
  394 #       0x02    don't use the npx registers to optimize bzero.
  395 #       0x04    don't use the npx registers to optimize copyin or copyout.
  396 # The npx registers are normally used to optimize copying and zeroing when
  397 # all of the following conditions are satisfied:
  398 #       I586_CPU is an option
  399 #       the cpu is an i586 (perhaps not a Pentium)
  400 #       the probe for npx0 succeeds
  401 #       INT 16 exception handling works.
  402 # Then copying and zeroing using the npx registers is normally 30-100% faster.
  403 # The flags can be used to control cases where it doesn't work or is slower.
  404 # Setting them at boot time using hints works right (the optimizations
  405 # are not used until later in the bootstrap when npx0 is attached).
  406 # Flag 0x08 automatically disables the i586 optimized routines.
  407 #
  408 
  409 #
  410 # Optional devices:
  411 #
  412 
  413 # PS/2 mouse
  414 device          psm
  415 hint.psm.0.at="atkbdc"
  416 hint.psm.0.irq="12"
  417 
  418 # Options for psm:
  419 options         PSM_HOOKRESUME          #hook the system resume event, useful
  420                                         #for some laptops
  421 options         PSM_RESETAFTERSUSPEND   #reset the device at the resume event
  422 
  423 # The keyboard controller; it controls the keyboard and the PS/2 mouse.
  424 device          atkbdc
  425 hint.atkbdc.0.at="isa"
  426 hint.atkbdc.0.port="0x060"
  427 
  428 # The AT keyboard
  429 device          atkbd
  430 hint.atkbd.0.at="atkbdc"
  431 hint.atkbd.0.irq="1"
  432 
  433 # Options for atkbd:
  434 options         ATKBD_DFLT_KEYMAP       # specify the built-in keymap
  435 makeoptions     ATKBD_DFLT_KEYMAP=fr.dvorak
  436 
  437 # `flags' for atkbd:
  438 #       0x01    Force detection of keyboard, else we always assume a keyboard
  439 #       0x02    Don't reset keyboard, useful for some newer ThinkPads
  440 #       0x03    Force detection and avoid reset, might help with certain
  441 #               dockingstations
  442 #       0x04    Old-style (XT) keyboard support, useful for older ThinkPads
  443 
  444 # Video card driver for VGA adapters.
  445 device          vga
  446 hint.vga.0.at="isa"
  447 
  448 # Options for vga:
  449 # Try the following option if the mouse pointer is not drawn correctly
  450 # or font does not seem to be loaded properly.  May cause flicker on
  451 # some systems.
  452 options         VGA_ALT_SEQACCESS
  453 
  454 # If you can dispense with some vga driver features, you may want to
  455 # use the following options to save some memory.
  456 #options        VGA_NO_FONT_LOADING     # don't save/load font
  457 #options        VGA_NO_MODE_CHANGE      # don't change video modes
  458 
  459 # Older video cards may require this option for proper operation.
  460 options         VGA_SLOW_IOACCESS       # do byte-wide i/o's to TS and GDC regs
  461 
  462 # The following option probably won't work with the LCD displays.
  463 options         VGA_WIDTH90             # support 90 column modes
  464 
  465 # Debugging.
  466 options         VGA_DEBUG
  467 
  468 # vt(4) drivers.
  469 device          vt_vga
  470 
  471 # Linear framebuffer driver for S3 VESA 1.2 cards. Works on top of VESA.
  472 device          s3pci
  473 
  474 # 3Dfx Voodoo Graphics, Voodoo II /dev/3dfx CDEV support.  This will create
  475 # the /dev/3dfx0 device to work with glide implementations.  This should get
  476 # linked to /dev/3dfx and /dev/voodoo.  Note that this is not the same as
  477 # the tdfx DRI module from XFree86 and is completely unrelated.
  478 #
  479 # To enable Linuxulator support, one must also include COMPAT_LINUX in the
  480 # config as well.  The other option is to load both as modules.
  481 
  482 device          tdfx                    # Enable 3Dfx Voodoo support
  483 device          tdfx_linux              # Enable Linuxulator support
  484 
  485 #
  486 # ACPI support using the Intel ACPI Component Architecture reference
  487 # implementation.
  488 #
  489 # ACPI_DEBUG enables the use of the debug.acpi.level and debug.acpi.layer
  490 # kernel environment variables to select initial debugging levels for the
  491 # Intel ACPICA code.  (Note that the Intel code must also have USE_DEBUGGER
  492 # defined when it is built).
  493 
  494 device          acpi
  495 options         ACPI_DEBUG
  496 options         ACPI_DMAR
  497 
  498 # ACPI WMI Mapping driver
  499 device          acpi_wmi
  500 
  501 # ACPI Asus Extras (LCD backlight/brightness, video output, etc.)
  502 device          acpi_asus
  503 
  504 # ACPI Fujitsu Extras (Buttons)
  505 device          acpi_fujitsu
  506 
  507 # ACPI extras driver for HP laptops
  508 device          acpi_hp
  509 
  510 # ACPI extras driver for IBM laptops
  511 device          acpi_ibm
  512 
  513 # ACPI Panasonic Extras (LCD backlight/brightness, video output, etc.)
  514 device          acpi_panasonic
  515 
  516 # ACPI Sony extra (LCD brightness)
  517 device          acpi_sony
  518 
  519 # ACPI Toshiba Extras (LCD backlight/brightness, video output, etc.)
  520 device          acpi_toshiba
  521 
  522 # ACPI Video Extensions (LCD backlight/brightness, video output, etc.)
  523 device          acpi_video
  524 
  525 # ACPI Docking Station
  526 device          acpi_dock
  527 
  528 # ACPI ASOC ATK0110 ASUSTeK AI Booster (voltage, temperature and fan sensors)
  529 device          aibs
  530 
  531 # The cpufreq(4) driver provides support for non-ACPI CPU frequency control
  532 device          cpufreq
  533 
  534 # Direct Rendering modules for 3D acceleration.
  535 device          drm             # DRM core module required by DRM drivers
  536 device          i915drm         # Intel i830 through i915
  537 device          mach64drm       # ATI Rage Pro, Rage Mobility P/M, Rage XL
  538 device          mgadrm          # AGP Matrox G200, G400, G450, G550
  539 device          r128drm         # ATI Rage 128
  540 device          radeondrm       # ATI Radeon
  541 device          savagedrm       # S3 Savage3D, Savage4
  542 device          sisdrm          # SiS 300/305, 540, 630
  543 device          tdfxdrm         # 3dfx Voodoo 3/4/5 and Banshee
  544 device          viadrm          # VIA
  545 options         DRM_DEBUG       # Include debug printfs (slow)
  546 
  547 #
  548 # mse: Logitech and ATI InPort bus mouse ports
  549 
  550 device          mse
  551 hint.mse.0.at="isa"
  552 hint.mse.0.port="0x23c"
  553 hint.mse.0.irq="5"
  554 
  555 #
  556 # Network interfaces:
  557 #
  558 
  559 # bxe:  Broadcom NetXtreme II (BCM5771X/BCM578XX) PCIe 10Gb Ethernet
  560 #       adapters.
  561 # ce:   Cronyx Tau-PCI/32 sync single/dual port G.703/E1 serial adaptor
  562 #       with 32 HDLC subchannels (requires sppp (default), or NETGRAPH if
  563 #       NETGRAPH_CRONYX is configured)
  564 # cp:   Cronyx Tau-PCI sync single/dual/four port
  565 #       V.35/RS-232/RS-530/RS-449/X.21/G.703/E1/E3/T3/STS-1
  566 #       serial adaptor (requires sppp (default), or NETGRAPH if
  567 #       NETGRAPH_CRONYX is configured)
  568 # cs:   IBM Etherjet and other Crystal Semi CS89x0-based adapters
  569 # ctau: Cronyx Tau sync dual port V.35/RS-232/RS-530/RS-449/X.21/G.703/E1
  570 #       serial adaptor (requires sppp (default), or NETGRAPH if
  571 #       NETGRAPH_CRONYX is configured)
  572 # ed:   Western Digital and SMC 80xx; Novell NE1000 and NE2000; 3Com 3C503
  573 #       HP PC Lan+, various PC Card devices
  574 #       (requires miibus)
  575 # ie:   AT&T StarLAN 10 and EN100; 3Com 3C507; unknown NI5210;
  576 #       Intel EtherExpress
  577 # ipw:  Intel PRO/Wireless 2100 IEEE 802.11 adapter
  578 # iwi:  Intel PRO/Wireless 2200BG/2225BG/2915ABG IEEE 802.11 adapters
  579 #       Requires the iwi firmware module
  580 # iwn:  Intel Wireless WiFi Link 1000/105/135/2000/4965/5000/6000/6050 abgn
  581 #       802.11 network adapters
  582 #       Requires the iwn firmware module
  583 # mthca: Mellanox HCA InfiniBand
  584 # mlx4ib: Mellanox ConnectX HCA InfiniBand
  585 # mlx4en: Mellanox ConnectX HCA Ethernet
  586 # nfe:  nVidia nForce MCP on-board Ethernet Networking (BSD open source)
  587 # sbni: Granch SBNI12-xx ISA and PCI adapters
  588 # vmx:  VMware VMXNET3 Ethernet (BSD open source)
  589 # wl:   Lucent Wavelan (ISA card only).
  590 # wpi:  Intel 3945ABG Wireless LAN controller
  591 #       Requires the wpi firmware module
  592 
  593 # Order for ISA/EISA devices is important here
  594 
  595 device          bxe             # Broadcom NetXtreme II BCM5771X/BCM578XX 10GbE
  596 device          ce
  597 device          cp
  598 device          cs              # Crystal Semiconductor CS89x0 NIC
  599 hint.cs.0.at="isa"
  600 hint.cs.0.port="0x300"
  601 device          ctau
  602 hint.ctau.0.at="isa"
  603 hint.ctau.0.port="0x240"
  604 hint.ctau.0.irq="15"
  605 hint.ctau.0.drq="7"
  606 #options        NETGRAPH_CRONYX         # Enable NETGRAPH support for Cronyx adapter(s)
  607 device          ed              # NE[12]000, SMC Ultra, 3c503, DS8390 cards
  608 options         ED_3C503
  609 options         ED_HPP
  610 options         ED_SIC
  611 hint.ed.0.at="isa"
  612 hint.ed.0.port="0x280"
  613 hint.ed.0.irq="5"
  614 hint.ed.0.maddr="0xd8000"
  615 device          ie              # EtherExpress 8/16, 3C507, StarLAN 10 etc.
  616 # Hints only required for Starlan
  617 hint.ie.2.at="isa"
  618 hint.ie.2.port="0x300"
  619 hint.ie.2.irq="5"
  620 hint.ie.2.maddr="0xd0000"
  621 device          ipw             # Intel 2100 wireless NICs.
  622 device          iwi             # Intel 2200BG/2225BG/2915ABG wireless NICs.
  623 device          iwn             # Intel 4965/1000/5000/6000 wireless NICs.
  624 # Hint for the i386-only ISA front-end of le(4).
  625 hint.le.0.at="isa"
  626 hint.le.0.port="0x280"
  627 hint.le.0.irq="10"
  628 hint.le.0.drq="0"
  629 device          mthca           # Mellanox HCA InfiniBand
  630 device          mlx4            # Shared code module between IB and Ethernet
  631 device          mlx4ib          # Mellanox ConnectX HCA InfiniBand
  632 device          mlx4en          # Mellanox ConnectX HCA Ethernet
  633 device          nfe             # nVidia nForce MCP on-board Ethernet
  634 device          sbni
  635 hint.sbni.0.at="isa"
  636 hint.sbni.0.port="0x210"
  637 hint.sbni.0.irq="0xefdead"
  638 hint.sbni.0.flags="0"
  639 device          vmx             # VMware VMXNET3 Ethernet
  640 device          wl
  641 hint.wl.0.at="isa"
  642 hint.wl.0.port="0x300"
  643 options         WLCACHE         # enables the signal-strength cache
  644 options         WLDEBUG         # enables verbose debugging output
  645 device          wpi             # Intel 3945ABG wireless NICs.
  646 
  647 # IEEE 802.11 adapter firmware modules
  648 
  649 # Intel PRO/Wireless 2100 firmware:
  650 #   ipwfw:              BSS/IBSS/monitor mode firmware
  651 #   ipwbssfw:           BSS mode firmware
  652 #   ipwibssfw:          IBSS mode firmware
  653 #   ipwmonitorfw:       Monitor mode firmware
  654 # Intel PRO/Wireless 2200BG/2225BG/2915ABG firmware:
  655 #   iwifw:              BSS/IBSS/monitor mode firmware
  656 #   iwibssfw:           BSS mode firmware
  657 #   iwiibssfw:          IBSS mode firmware
  658 #   iwimonitorfw:       Monitor mode firmware
  659 # Intel Wireless WiFi Link 4965/1000/5000/6000 series firmware:
  660 #   iwnfw:              Single module to support all devices
  661 #   iwn1000fw:          Specific module for the 1000 only
  662 #   iwn105fw:           Specific module for the 105 only
  663 #   iwn135fw:           Specific module for the 135 only
  664 #   iwn2000fw:          Specific module for the 2000 only
  665 #   iwn2030fw:          Specific module for the 2030 only
  666 #   iwn4965fw:          Specific module for the 4965 only
  667 #   iwn5000fw:          Specific module for the 5000 only
  668 #   iwn5150fw:          Specific module for the 5150 only
  669 #   iwn6000fw:          Specific module for the 6000 only
  670 #   iwn6000g2afw:       Specific module for the 6000g2a only
  671 #   iwn6000g2bfw:       Specific module for the 6000g2b only
  672 #   iwn6050fw:          Specific module for the 6050 only
  673 # wpifw:        Intel 3945ABG Wireless LAN Controller firmware
  674 
  675 device          iwifw
  676 device          iwibssfw
  677 device          iwiibssfw
  678 device          iwimonitorfw
  679 device          ipwfw
  680 device          ipwbssfw
  681 device          ipwibssfw
  682 device          ipwmonitorfw
  683 device          iwnfw
  684 device          iwn1000fw
  685 device          iwn105fw
  686 device          iwn135fw
  687 device          iwn2000fw
  688 device          iwn2030fw
  689 device          iwn4965fw
  690 device          iwn5000fw
  691 device          iwn5150fw
  692 device          iwn6000fw
  693 device          iwn6000g2afw
  694 device          iwn6000g2bfw
  695 device          iwn6050fw
  696 device          wpifw
  697 
  698 #
  699 # Non-Transparent Bridge (NTB) drivers
  700 #
  701 device          if_ntb          # Virtual NTB network interface
  702 device          ntb_transport   # NTB packet transport driver
  703 device          ntb             # NTB hardware interface
  704 device          ntb_hw_intel    # Intel NTB hardware driver
  705 device          ntb_hw_plx      # PLX NTB hardware driver
  706 
  707 #
  708 # ATA raid adapters
  709 #
  710 device          pst
  711 
  712 #
  713 # Areca 11xx and 12xx series of SATA II RAID controllers.
  714 # CAM is required.
  715 #
  716 device          arcmsr          # Areca SATA II RAID
  717 
  718 #
  719 # 3ware 9000 series PATA/SATA RAID controller driver and options.
  720 # The driver is implemented as a SIM, and so, needs the CAM infrastructure.
  721 #
  722 options         TWA_DEBUG               # 0-10; 10 prints the most messages.
  723 options         TWA_FLASH_FIRMWARE      # firmware image bundled when defined.
  724 device          twa                     # 3ware 9000 series PATA/SATA RAID
  725 
  726 #
  727 # SCSI host adapters:
  728 #
  729 # ncv: NCR 53C500 based SCSI host adapters.
  730 # nsp: Workbit Ninja SCSI-3 based PC Card SCSI host adapters.
  731 # stg: TMC 18C30, 18C50 based SCSI host adapters.
  732 
  733 device          ncv
  734 device          nsp
  735 device          stg
  736 hint.stg.0.at="isa"
  737 hint.stg.0.port="0x140"
  738 hint.stg.0.port="11"
  739 
  740 #
  741 # Adaptec FSA RAID controllers, including integrated DELL controllers,
  742 # the Dell PERC 2/QC and the HP NetRAID-4M
  743 device          aac
  744 device          aacp    # SCSI Passthrough interface (optional, CAM required)
  745 
  746 #
  747 # Adaptec by PMC RAID controllers, Series 6/7/8 and upcoming families
  748 device          aacraid         # Container interface, CAM required
  749 
  750 #
  751 # Highpoint RocketRAID 27xx.
  752 device          hpt27xx
  753 
  754 #
  755 # Highpoint RocketRAID 182x.
  756 device          hptmv
  757 
  758 #
  759 # Highpoint DC7280 and R750.
  760 device          hptnr
  761 
  762 #
  763 # Highpoint RocketRAID.  Supports RR172x, RR222x, RR2240, RR232x, RR2340,
  764 # RR2210, RR174x, RR2522, RR231x, RR230x.
  765 device          hptrr
  766 
  767 #
  768 # Highpoint RocketRaid 3xxx series SATA RAID
  769 device          hptiop
  770 
  771 #
  772 # Intel integrated Memory Controller (iMC) SMBus controller
  773 #       Sandybridge-Xeon, Ivybridge-Xeon, Haswell-Xeon, Broadwell-Xeon
  774 device          imcsmb
  775 
  776 #
  777 # IBM (now Adaptec) ServeRAID controllers
  778 device          ips
  779 
  780 #
  781 # Intel C600 (Patsburg) integrated SAS controller
  782 device          isci
  783 options         ISCI_LOGGING    # enable debugging in isci HAL
  784 
  785 #
  786 # NVM Express (NVMe) support
  787 device         nvme    # base NVMe driver
  788 device         nvd     # expose NVMe namespaces as disks, depends on nvme
  789 
  790 #
  791 # PMC-Sierra SAS/SATA controller
  792 device          pmspcv
  793 #
  794 # SafeNet crypto driver: can be moved to the MI NOTES as soon as
  795 # it's tested on a big-endian machine
  796 #
  797 device          safe            # SafeNet 1141
  798 options         SAFE_DEBUG      # enable debugging support: hw.safe.debug
  799 options         SAFE_RNDTEST    # enable rndtest support
  800 
  801 #
  802 # glxiic is an I2C driver for the AMD Geode LX CS5536 System Management Bus
  803 # controller.  Requires 'device iicbus'.
  804 #
  805 device          glxiic          # AMD Geode LX CS5536 System Management Bus
  806 
  807 #
  808 # glxsb is a driver for the Security Block in AMD Geode LX processors.
  809 # Requires 'device crypto'.
  810 #
  811 device          glxsb           # AMD Geode LX Security Block
  812 
  813 #
  814 # VirtIO support
  815 #
  816 # The virtio entry provides a generic bus for use by the device drivers.
  817 # It must be combined with an interface that communicates with the host.
  818 # Multiple such interfaces defined by the VirtIO specification. FreeBSD
  819 # only has support for PCI. Therefore, virtio_pci must be statically
  820 # compiled in or loaded as a module for the device drivers to function.
  821 #
  822 device          virtio          # Generic VirtIO bus (required)
  823 device          virtio_pci      # VirtIO PCI Interface
  824 device          vtnet           # VirtIO Ethernet device
  825 device          virtio_blk      # VirtIO Block device
  826 device          virtio_scsi     # VirtIO SCSI device
  827 device          virtio_balloon  # VirtIO Memory Balloon device
  828 device          virtio_random   # VirtIO Entropy device
  829 device          virtio_console  # VirtIO Console device
  830 
  831 device          hyperv          # HyperV drivers
  832 
  833 #####################################################################
  834 
  835 #
  836 # Miscellaneous hardware:
  837 #
  838 # apm: Laptop Advanced Power Management (experimental)
  839 # ipmi: Intelligent Platform Management Interface
  840 # smapi: System Management Application Program Interface driver
  841 # smbios: DMI/SMBIOS entry point
  842 # vpd: Vital Product Data kernel interface
  843 # pmtimer: Adjust system timer at wakeup time
  844 # pbio: Parallel (8255 PPI) basic I/O (mode 0) port (e.g. Advantech PCL-724)
  845 # spic: Sony Programmable I/O controller (VAIO notebooks)
  846 # asmc: Apple System Management Controller
  847 # si: Specialix International SI/XIO or SX intelligent serial card driver
  848 # tpm: Trusted Platform Module
  849 
  850 # Notes on APM
  851 #  The flags takes the following meaning for apm0:
  852 #    0x0020  Statclock is broken.
  853 
  854 # Notes on the Specialix SI/XIO driver:
  855 #  The host card is memory, not IO mapped.
  856 #  The Rev 1 host cards use a 64K chunk, on a 32K boundary.
  857 #  The Rev 2 host cards use a 32K chunk, on a 32K boundary.
  858 #  The cards can use an IRQ of 11, 12 or 15.
  859 
  860 # Notes on the Sony Programmable I/O controller
  861 #  This is a temporary driver that should someday be replaced by something
  862 #  that hooks into the ACPI layer.  The device is hooked to the PIIX4's
  863 #  General Device 10 decoder, which means you have to fiddle with PCI
  864 #  registers to map it in, even though it is otherwise treated here as
  865 #  an ISA device.  At the moment, the driver polls, although the device
  866 #  is capable of generating interrupts.  It largely undocumented.
  867 #  The port location in the hint is where you WANT the device to be
  868 #  mapped.  0x10a0 seems to be traditional.  At the moment the jogdial
  869 #  is the only thing truly supported, but apparently a fair percentage
  870 #  of the Vaio extra features are controlled by this device.
  871 
  872 device          apm
  873 hint.apm.0.flags="0x20"
  874 device          ipmi
  875 device          smapi
  876 device          smbios
  877 device          vpd
  878 device          pmtimer
  879 device          pbio
  880 hint.pbio.0.at="isa"
  881 hint.pbio.0.port="0x360"
  882 device          spic
  883 hint.spic.0.at="isa"
  884 hint.spic.0.port="0x10a0"
  885 device          asmc
  886 device          si
  887 device          tpm
  888 device          padlock_rng     # VIA Padlock RNG
  889 device          rdrand_rng      # Intel Bull Mountain RNG
  890 device          aesni           # AES-NI OpenCrypto module
  891 
  892 #
  893 # Laptop/Notebook options:
  894 #
  895 # See also:
  896 #  apm under `Miscellaneous hardware'
  897 # above.
  898 
  899 # For older notebooks that signal a powerfail condition (external
  900 # power supply dropped, or battery state low) by issuing an NMI:
  901 
  902 options         POWERFAIL_NMI   # make it beep instead of panicing
  903 
  904 #
  905 # I2C Bus
  906 #
  907 # Philips i2c bus support is provided by the `iicbus' device.
  908 #
  909 # Supported interfaces:
  910 # pcf   Philips PCF8584 ISA-bus controller
  911 #
  912 device          pcf
  913 hint.pcf.0.at="isa"
  914 hint.pcf.0.port="0x320"
  915 hint.pcf.0.irq="5"
  916 
  917 #
  918 # Hardware watchdog timers:
  919 #
  920 # ichwd: Intel ICH watchdog timer
  921 # amdsbwd: AMD SB7xx watchdog timer
  922 # viawd: VIA south bridge watchdog timer
  923 # wbwd: Winbond watchdog timer
  924 #
  925 device          ichwd
  926 device          amdsbwd
  927 device          viawd
  928 device          wbwd
  929 
  930 #
  931 # Temperature sensors:
  932 #
  933 # coretemp: on-die sensor on Intel Core and newer CPUs
  934 # amdtemp: on-die sensor on AMD K8/K10/K11 CPUs
  935 #
  936 device          coretemp
  937 device          amdtemp
  938 
  939 #
  940 # CPU control pseudo-device. Provides access to MSRs, CPUID info and
  941 # microcode update feature.
  942 #
  943 device          cpuctl
  944 
  945 #
  946 # System Management Bus (SMB)
  947 #
  948 options         ENABLE_ALART            # Control alarm on Intel intpm driver
  949 
  950 #
  951 # Set the number of PV entries per process.  Increasing this can
  952 # stop panics related to heavy use of shared memory.  However, that can
  953 # (combined with large amounts of physical memory) cause panics at
  954 # boot time due the kernel running out of VM space.
  955 #
  956 # If you're tweaking this, you might also want to increase the sysctls
  957 # "vm.v_free_min", "vm.v_free_reserved", and "vm.v_free_target".
  958 #
  959 # The value below is the one more than the default.
  960 #
  961 options         PMAP_SHPGPERPROC=201
  962 
  963 #
  964 # Change the size of the kernel virtual address space.  Due to
  965 # constraints in loader(8) on i386, this must be a multiple of 4.
  966 # 256 = 1 GB of kernel address space.  Increasing this also causes
  967 # a reduction of the address space in user processes.  512 splits
  968 # the 4GB cpu address space in half (2GB user, 2GB kernel).  For PAE
  969 # kernels, the value will need to be double non-PAE.  A value of 1024
  970 # for PAE kernels is necessary to split the address space in half.
  971 # This will likely need to be increased to handle memory sizes >4GB.
  972 # PAE kernels default to a value of 512.
  973 #
  974 options         KVA_PAGES=260
  975 
  976 #
  977 # Number of initial kernel page table pages used for early bootstrap.
  978 # This number should include enough pages to map the kernel, any
  979 # modules or other data loaded with the kernel by the loader, and data
  980 # structures allocated before the VM system is initialized such as the
  981 # vm_page_t array.  Each page table page maps 4MB (2MB with PAE).
  982 #
  983 options         NKPT=31
  984 
  985 
  986 #####################################################################
  987 # ABI Emulation
  988 
  989 # Enable iBCS2 runtime support for SCO and ISC binaries
  990 #options        IBCS2
  991 
  992 # Emulate spx device for client side of SVR3 local X interface
  993 options         SPX_HACK
  994 
  995 # Enable 32-bit runtime support for CloudABI binaries.
  996 options         COMPAT_CLOUDABI32
  997 
  998 # Enable Linux ABI emulation
  999 options         COMPAT_LINUX
 1000 
 1001 # Enable i386 a.out binary support
 1002 options         COMPAT_AOUT
 1003 
 1004 # Enable the linux-like proc filesystem support (requires COMPAT_LINUX
 1005 # and PSEUDOFS)
 1006 options         LINPROCFS
 1007 
 1008 #Enable the linux-like sys filesystem support (requires COMPAT_LINUX
 1009 # and PSEUDOFS)
 1010 options         LINSYSFS
 1011 
 1012 #
 1013 # SysVR4 ABI emulation
 1014 #
 1015 # The svr4 ABI emulator can be statically compiled into the kernel or loaded as
 1016 # a KLD module.
 1017 # The STREAMS network emulation code can also be compiled statically or as a
 1018 # module.  If loaded as a module, it must be loaded before the svr4 module
 1019 # (the /usr/sbin/svr4 script does this for you).  If compiling statically,
 1020 # the `streams' device must be configured into any kernel which also
 1021 # specifies COMPAT_SVR4.  It is possible to have a statically-configured
 1022 # STREAMS device and a dynamically loadable svr4 emulator;  the /usr/sbin/svr4
 1023 # script understands that it doesn't need to load the `streams' module under
 1024 # those circumstances.
 1025 # Caveat:  At this time, `options KTRACE' is required for the svr4 emulator
 1026 # (whether static or dynamic).
 1027 #
 1028 options         COMPAT_SVR4     # build emulator statically
 1029 options         DEBUG_SVR4      # enable verbose debugging
 1030 device          streams         # STREAMS network driver (required for svr4).
 1031 
 1032 # Enable NDIS binary driver support
 1033 options         NDISAPI
 1034 device          ndis
 1035 
 1036 
 1037 #####################################################################
 1038 # VM OPTIONS
 1039 
 1040 # Disable the 4 MByte page PSE CPU feature.  The PSE feature allows the
 1041 # kernel to use 4 MByte pages to map the kernel instead of 4k pages.
 1042 # This saves on the amount of memory needed for page tables needed to
 1043 # map the kernel.  You should only disable this feature as a temporary
 1044 # workaround if you are having problems with it enabled.
 1045 #
 1046 #options        DISABLE_PSE
 1047 
 1048 # Disable the global pages PGE CPU feature.  The PGE feature allows pages
 1049 # to be marked with the PG_G bit.  TLB entries for these pages are not
 1050 # flushed from the cache when %cr3 is reloaded.  This can make context
 1051 # switches less expensive.  You should only disable this feature as a
 1052 # temporary workaround if you are having problems with it enabled.
 1053 #
 1054 #options        DISABLE_PG_G
 1055 
 1056 # KSTACK_PAGES is the number of memory pages to assign to the kernel
 1057 # stack of each thread.
 1058 
 1059 options         KSTACK_PAGES=3
 1060 
 1061 # Enable detailed accounting by the PV entry allocator.
 1062 
 1063 options         PV_STATS
 1064 
 1065 #####################################################################
 1066 
 1067 # More undocumented options for linting.
 1068 # Note that documenting these are not considered an affront.
 1069 
 1070 options         FB_INSTALL_CDEV         # install a CDEV entry in /dev
 1071 
 1072 options         I586_PMC_GUPROF=0x70000
 1073 options         KBDIO_DEBUG=2
 1074 options         KBD_MAXRETRY=4
 1075 options         KBD_MAXWAIT=6
 1076 options         KBD_RESETDELAY=201
 1077 
 1078 options         PSM_DEBUG=1
 1079 
 1080 options         TIMER_FREQ=((14318182+6)/12)
 1081 
 1082 options         VM_KMEM_SIZE
 1083 options         VM_KMEM_SIZE_MAX
 1084 options         VM_KMEM_SIZE_SCALE
 1085 
 1086 

Cache object: 5e9c3c89b38b4e32ff9f22a03727e1ed


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