2 # NOTES -- Lines that can be cut/pasted into kernel and hints configs.
4 # This file contains machine dependent kernel configuration notes. For
5 # machine independent notes, look in /sys/conf/NOTES.
11 # Enable the kernel DTrace hooks which are required to load the DTrace
17 # NOTE: introduces CDDL-licensed components into the kernel
21 #device dtrace_profile
24 #device dtrace_systrace
25 #device dtrace_prototype
29 # Alternatively include all the DTrace modules
33 #####################################################################
36 # The apic device enables the use of the I/O APIC for interrupt delivery.
37 # The apic device can be used in both UP and SMP kernels, but is required
38 # for SMP kernels. Thus, the apic device is not strictly an SMP option,
39 # but it is a prerequisite for SMP.
43 # HTT CPUs should only be used if they are enabled in the BIOS. For
44 # the ACPI case, ACPI only correctly tells us about any HTT CPUs if
45 # they are enabled. However, most HTT systems do not list HTT CPUs
46 # in the MP Table if they are enabled, thus we guess at the HTT CPUs
47 # for the MP Table case. However, we shouldn't try to guess and use
48 # these CPUs if HTT is disabled. Thus, HTT guessing is only enabled
49 # for the MP Table if the user explicitly asks for it via the
50 # MPTABLE_FORCE_HTT option. Do NOT use this option if you have HTT
51 # disabled in your BIOS.
53 # IPI_PREEMPTION instructs the kernel to preempt threads running on other
54 # CPUS if needed. Relies on the PREEMPTION option
57 device apic # I/O apic
60 options MPTABLE_FORCE_HTT # Enable HTT CPUs with the MP Table
61 options IPI_PREEMPTION
65 options COUNT_XINVLTLB_HITS # Counters for TLB events
66 options COUNT_IPIS # Per-CPU IPI interrupt counters
70 #####################################################################
74 # You must specify at least one CPU (the one you intend to run on);
75 # deleting the specification for CPUs you don't need to use may make
76 # parts of the system run faster.
79 cpu I586_CPU # aka Pentium(tm)
80 cpu I686_CPU # aka Pentium Pro(tm)
83 # Options for CPU features.
85 # CPU_ATHLON_SSE_HACK tries to enable SSE instructions when the BIOS has
86 # forgotten to enable them.
88 # CPU_BLUELIGHTNING_3X enables triple-clock mode on IBM Blue Lightning
89 # CPU if CPU supports it. The default is double-clock mode on
90 # BlueLightning CPU box.
92 # CPU_BLUELIGHTNING_FPU_OP_CACHE enables FPU operand cache on IBM
93 # BlueLightning CPU. It works only with Cyrix FPU, and this option
94 # should not be used with Intel FPU.
96 # CPU_BTB_EN enables branch target buffer on Cyrix 5x86 (NOTE 1).
98 # CPU_CYRIX_NO_LOCK enables weak locking for the entire address space
99 # of Cyrix 6x86 and 6x86MX CPUs by setting the NO_LOCK bit of CCR1.
100 # Otherwise, the NO_LOCK bit of CCR1 is cleared. (NOTE 3)
102 # CPU_DIRECT_MAPPED_CACHE sets L1 cache of Cyrix 486DLC CPU in direct
103 # mapped mode. Default is 2-way set associative mode.
105 # CPU_DISABLE_5X86_LSSER disables load store serialize (i.e., enables
106 # reorder). This option should not be used if you use memory mapped
109 # CPU_ELAN enables support for AMDs ElanSC520 CPU.
110 # CPU_ELAN_PPS enables precision timestamp code.
111 # CPU_ELAN_XTAL sets the clock crystal frequency in Hz.
113 # CPU_ENABLE_LONGRUN enables support for Transmeta Crusoe LongRun
114 # technology which allows to restrict power consumption of the CPU by
115 # using group of hw.crusoe.* sysctls.
117 # CPU_FASTER_5X86_FPU enables faster FPU exception handler.
119 # CPU_GEODE is for the SC1100 Geode embedded processor. This option
120 # is necessary because the i8254 timecounter is toast.
122 # CPU_I486_ON_386 enables CPU cache on i486 based CPU upgrade products
125 # CPU_IORT defines I/O clock delay time (NOTE 1). Default values of
126 # I/O clock delay time on Cyrix 5x86 and 6x86 are 0 and 7,respectively
129 # CPU_L2_LATENCY specifies the L2 cache latency value. This option is used
130 # only when CPU_PPRO2CELERON is defined and Mendocino Celeron is detected.
131 # The default value is 5.
133 # CPU_LOOP_EN prevents flushing the prefetch buffer if the destination
134 # of a jump is already present in the prefetch buffer on Cyrix 5x86(NOTE
137 # CPU_PPRO2CELERON enables L2 cache of Mendocino Celeron CPUs. This option
138 # is useful when you use Socket 8 to Socket 370 converter, because most Pentium
139 # Pro BIOSs do not enable L2 cache of Mendocino Celeron CPUs.
141 # CPU_RSTK_EN enables return stack on Cyrix 5x86 (NOTE 1).
143 # CPU_SOEKRIS enables support www.soekris.com hardware.
145 # CPU_SUSP_HLT enables suspend on HALT. If this option is set, CPU
146 # enters suspend mode following execution of HALT instruction.
148 # CPU_UPGRADE_HW_CACHE eliminates unneeded cache flush instruction(s).
150 # CPU_WT_ALLOC enables write allocation on Cyrix 6x86/6x86MX and AMD
153 # CYRIX_CACHE_WORKS enables CPU cache on Cyrix 486 CPUs with cache
154 # flush at hold state.
156 # CYRIX_CACHE_REALLY_WORKS enables (1) CPU cache on Cyrix 486 CPUs
157 # without cache flush at hold state, and (2) write-back CPU cache on
158 # Cyrix 6x86 whose revision < 2.7 (NOTE 2).
160 # NO_F00F_HACK disables the hack that prevents Pentiums (and ONLY
161 # Pentiums) from locking up when a LOCK CMPXCHG8B instruction is
162 # executed. This option is only needed if I586_CPU is also defined,
163 # and should be included for any non-Pentium CPU that defines it.
165 # NO_MEMORY_HOLE is an optimisation for systems with AMD K6 processors
166 # which indicates that the 15-16MB range is *definitely* not being
167 # occupied by an ISA memory hole.
169 # NOTE 1: The options, CPU_BTB_EN, CPU_LOOP_EN, CPU_IORT,
170 # CPU_LOOP_EN and CPU_RSTK_EN should not be used because of CPU bugs.
171 # These options may crash your system.
173 # NOTE 2: If CYRIX_CACHE_REALLY_WORKS is not set, CPU cache is enabled
174 # in write-through mode when revision < 2.7. If revision of Cyrix
175 # 6x86 >= 2.7, CPU cache is always enabled in write-back mode.
177 # NOTE 3: This option may cause failures for software that requires
178 # locked cycles in order to operate correctly.
180 options CPU_ATHLON_SSE_HACK
181 options CPU_BLUELIGHTNING_3X
182 options CPU_BLUELIGHTNING_FPU_OP_CACHE
184 options CPU_DIRECT_MAPPED_CACHE
185 options CPU_DISABLE_5X86_LSSER
188 options CPU_ELAN_XTAL=32768000
189 options CPU_ENABLE_LONGRUN
190 options CPU_FASTER_5X86_FPU
192 options CPU_I486_ON_386
194 options CPU_L2_LATENCY=5
196 options CPU_PPRO2CELERON
200 options CPU_UPGRADE_HW_CACHE
202 options CYRIX_CACHE_WORKS
203 options CYRIX_CACHE_REALLY_WORKS
204 #options NO_F00F_HACK
207 options NPX_DEBUG # enable npx debugging
210 # PERFMON causes the driver for Pentium/Pentium Pro performance counters
211 # to be compiled. See perfmon(4) for more information.
216 #####################################################################
220 # DEVICE_POLLING adds support for mixed interrupt-polling handling
221 # of network device drivers, which has significant benefits in terms
222 # of robustness to overloads and responsivity, as well as permitting
223 # accurate scheduling of the CPU time between kernel network processing
224 # and other activities. The drawback is a moderate (up to 1/HZ seconds)
225 # potential increase in response times.
226 # It is strongly recommended to use HZ=1000 or 2000 with DEVICE_POLLING
227 # to achieve smoother behaviour.
228 # Additionally, you can enable/disable polling at runtime with help of
229 # the ifconfig(8) utility, and select the CPU fraction reserved to
230 # userland with the sysctl variable kern.polling.user_frac
231 # (default 50, range 0..100).
233 # Not all device drivers support this mode of operation at the time of
234 # this writing. See polling(4) for more details.
236 options DEVICE_POLLING
238 # BPF_JITTER adds support for BPF just-in-time compiler.
242 # OpenFabrics Enterprise Distribution (Infiniband).
244 options OFED_DEBUG_INIT
246 # Sockets Direct Protocol
256 #####################################################################
259 # Provide read/write access to the memory in the clock chip.
260 device nvram # Access to rtc cmos via /dev/nvram
263 #####################################################################
264 # MISCELLANEOUS DEVICES AND OPTIONS
266 device speaker #Play IBM BASIC-style noises out your speaker
267 envvar hint.speaker.0.at="isa"
268 envvar hint.speaker.0.port="0x61"
271 #####################################################################
272 # HARDWARE BUS CONFIGURATION
282 # AUTO_EOI_1 enables the `automatic EOI' feature for the master 8259A
283 # interrupt controller. This saves about 0.7-1.25 usec for each interrupt.
284 # This option breaks suspend/resume on some portables.
286 # AUTO_EOI_2 enables the `automatic EOI' feature for the slave 8259A
287 # interrupt controller. This saves about 0.7-1.25 usec for each interrupt.
288 # Automatic EOI is documented not to work for the slave with the
289 # original i8259A, but it works for some clones and some integrated
292 # MAXMEM specifies the amount of RAM on the machine; if this is not
293 # specified, FreeBSD will first read the amount of memory from the CMOS
294 # RAM, so the amount of memory will initially be limited to 64MB or 16MB
295 # depending on the BIOS. If the BIOS reports 64MB, a memory probe will
296 # then attempt to detect the installed amount of RAM. If this probe
297 # fails to detect >64MB RAM you will have to use the MAXMEM option.
298 # The amount is in kilobytes, so for a machine with 128MB of RAM, it would
299 # be 131072 (128 * 1024).
301 # BROKEN_KEYBOARD_RESET disables the use of the keyboard controller to
302 # reset the CPU for reboot. This is needed on some systems with broken
303 # keyboard controllers.
308 options MAXMEM=(128*1024)
309 #options BROKEN_KEYBOARD_RESET
319 #####################################################################
320 # HARDWARE DEVICE CONFIGURATION
322 # To include support for VGA VESA video modes
325 # Turn on extra debugging checks and output for VESA support.
328 device dpms # DPMS suspend & resume via VESA BIOS
330 # x86 real mode BIOS emulator, required by atkbdc/dpms/vesa
334 # Hints for the non-optional Numeric Processing eXtension driver.
335 envvar hint.npx.0.flags="0x0"
336 envvar hint.npx.0.irq="13"
340 # 0x01 don't use the npx registers to optimize bcopy.
341 # 0x02 don't use the npx registers to optimize bzero.
342 # 0x04 don't use the npx registers to optimize copyin or copyout.
343 # The npx registers are normally used to optimize copying and zeroing when
344 # all of the following conditions are satisfied:
345 # I586_CPU is an option
346 # the cpu is an i586 (perhaps not a Pentium)
347 # the probe for npx0 succeeds
348 # INT 16 exception handling works.
349 # Then copying and zeroing using the npx registers is normally 30-100% faster.
350 # The flags can be used to control cases where it doesn't work or is slower.
351 # Setting them at boot time using hints works right (the optimizations
352 # are not used until later in the bootstrap when npx0 is attached).
353 # Flag 0x08 automatically disables the i586 optimized routines.
362 envvar hint.psm.0.at="atkbdc"
363 envvar hint.psm.0.irq="12"
366 options PSM_HOOKRESUME #hook the system resume event, useful
368 options PSM_RESETAFTERSUSPEND #reset the device at the resume event
370 # The keyboard controller; it controls the keyboard and the PS/2 mouse.
372 envvar hint.atkbdc.0.at="isa"
373 envvar hint.atkbdc.0.port="0x060"
377 envvar hint.atkbd.0.at="atkbdc"
378 envvar hint.atkbd.0.irq="1"
381 options ATKBD_DFLT_KEYMAP # specify the built-in keymap
382 makeoptions ATKBD_DFLT_KEYMAP=fr.dvorak
385 # 0x01 Force detection of keyboard, else we always assume a keyboard
386 # 0x02 Don't reset keyboard, useful for some newer ThinkPads
387 # 0x03 Force detection and avoid reset, might help with certain
389 # 0x04 Old-style (XT) keyboard support, useful for older ThinkPads
391 # Video card driver for VGA adapters.
393 envvar hint.vga.0.at="isa"
396 # Try the following option if the mouse pointer is not drawn correctly
397 # or font does not seem to be loaded properly. May cause flicker on
399 options VGA_ALT_SEQACCESS
401 # If you can dispense with some vga driver features, you may want to
402 # use the following options to save some memory.
403 #options VGA_NO_FONT_LOADING # don't save/load font
404 #options VGA_NO_MODE_CHANGE # don't change video modes
406 # Older video cards may require this option for proper operation.
407 options VGA_SLOW_IOACCESS # do byte-wide i/o's to TS and GDC regs
409 # The following option probably won't work with the LCD displays.
410 options VGA_WIDTH90 # support 90 column modes
419 # Linear framebuffer driver for S3 VESA 1.2 cards. Works on top of VESA.
422 # 3Dfx Voodoo Graphics, Voodoo II /dev/3dfx CDEV support. This will create
423 # the /dev/3dfx0 device to work with glide implementations. This should get
424 # linked to /dev/3dfx and /dev/voodoo. Note that this is not the same as
425 # the tdfx DRI module from XFree86 and is completely unrelated.
427 # To enable Linuxulator support, one must also load linux.ko and tdfx_linux.ko.
429 device tdfx # Enable 3Dfx Voodoo support
431 options IOMMU # Enable IOMMU support
434 # ACPI support using the Intel ACPI Component Architecture reference
437 # ACPI_DEBUG enables the use of the debug.acpi.level and debug.acpi.layer
438 # kernel environment variables to select initial debugging levels for the
439 # Intel ACPICA code. (Note that the Intel code must also have USE_DEBUGGER
440 # defined when it is built).
445 # ACPI WMI Mapping driver
448 # ACPI Asus Extras (LCD backlight/brightness, video output, etc.)
451 # ACPI Fujitsu Extras (Buttons)
454 # ACPI extras driver for HP laptops
457 # ACPI extras driver for IBM laptops
460 # ACPI Panasonic Extras (LCD backlight/brightness, video output, etc.)
461 device acpi_panasonic
463 # ACPI Sony extra (LCD brightness)
466 # ACPI Toshiba Extras (LCD backlight/brightness, video output, etc.)
469 # ACPI Video Extensions (LCD backlight/brightness, video output, etc.)
472 # ACPI Docking Station
475 # ACPI ASOC ATK0110 ASUSTeK AI Booster (voltage, temperature and fan sensors)
478 # The cpufreq(4) driver provides support for non-ACPI CPU frequency control
482 # Network interfaces:
485 # bxe: Broadcom NetXtreme II (BCM5771X/BCM578XX) PCIe 10Gb Ethernet
487 # igc: Intel I225 2.5G Ethernet adapter
488 # ipw: Intel PRO/Wireless 2100 IEEE 802.11 adapter
489 # iwi: Intel PRO/Wireless 2200BG/2225BG/2915ABG IEEE 802.11 adapters
490 # Requires the iwi firmware module
491 # iwn: Intel Wireless WiFi Link 1000/105/135/2000/4965/5000/6000/6050 abgn
492 # 802.11 network adapters
493 # Requires the iwn firmware module
494 # mthca: Mellanox HCA InfiniBand
495 # mlx4ib: Mellanox ConnectX HCA InfiniBand
496 # mlx4en: Mellanox ConnectX HCA Ethernet
497 # nfe: nVidia nForce MCP on-board Ethernet Networking (BSD open source)
498 # sbni: Granch SBNI12-xx ISA and PCI adapters
499 # vmx: VMware VMXNET3 Ethernet (BSD open source)
500 # wpi: Intel 3945ABG Wireless LAN controller
501 # Requires the wpi firmware module
503 # Order for ISA/EISA devices is important here
505 device bxe # Broadcom NetXtreme II BCM5771X/BCM578XX 10GbE
506 envvar hint.cs.0.at="isa"
507 envvar hint.cs.0.port="0x300"
508 envvar hint.ed.0.at="isa"
509 envvar hint.ed.0.port="0x280"
510 envvar hint.ed.0.irq="5"
511 envvar hint.ed.0.maddr="0xd8000"
512 device igc # Intel I225 2.5G Ethernet
513 device ipw # Intel 2100 wireless NICs.
514 device iwi # Intel 2200BG/2225BG/2915ABG wireless NICs.
515 device iwn # Intel 4965/1000/5000/6000 wireless NICs.
516 # Hint for the i386-only ISA front-end of le(4).
517 envvar hint.le.0.at="isa"
518 envvar hint.le.0.port="0x280"
519 envvar hint.le.0.irq="10"
520 envvar hint.le.0.drq="0"
521 device mthca # Mellanox HCA InfiniBand
522 device mlx4 # Shared code module between IB and Ethernet
523 device mlx4ib # Mellanox ConnectX HCA InfiniBand
524 device mlx4en # Mellanox ConnectX HCA Ethernet
525 device nfe # nVidia nForce MCP on-board Ethernet
527 envvar hint.sbni.0.at="isa"
528 envvar hint.sbni.0.port="0x210"
529 envvar hint.sbni.0.irq="0xefdead"
530 envvar hint.sbni.0.flags="0"
531 device vmx # VMware VMXNET3 Ethernet
532 device wpi # Intel 3945ABG wireless NICs.
534 # IEEE 802.11 adapter firmware modules
536 # Intel PRO/Wireless 2100 firmware:
537 # ipwfw: BSS/IBSS/monitor mode firmware
538 # ipwbssfw: BSS mode firmware
539 # ipwibssfw: IBSS mode firmware
540 # ipwmonitorfw: Monitor mode firmware
541 # Intel PRO/Wireless 2200BG/2225BG/2915ABG firmware:
542 # iwifw: BSS/IBSS/monitor mode firmware
543 # iwibssfw: BSS mode firmware
544 # iwiibssfw: IBSS mode firmware
545 # iwimonitorfw: Monitor mode firmware
546 # Intel Wireless WiFi Link 4965/1000/5000/6000 series firmware:
547 # iwnfw: Single module to support all devices
548 # iwn1000fw: Specific module for the 1000 only
549 # iwn105fw: Specific module for the 105 only
550 # iwn135fw: Specific module for the 135 only
551 # iwn2000fw: Specific module for the 2000 only
552 # iwn2030fw: Specific module for the 2030 only
553 # iwn4965fw: Specific module for the 4965 only
554 # iwn5000fw: Specific module for the 5000 only
555 # iwn5150fw: Specific module for the 5150 only
556 # iwn6000fw: Specific module for the 6000 only
557 # iwn6000g2afw: Specific module for the 6000g2a only
558 # iwn6000g2bfw: Specific module for the 6000g2b only
559 # iwn6050fw: Specific module for the 6050 only
560 # wpifw: Intel 3945ABG Wireless LAN Controller firmware
586 # Non-Transparent Bridge (NTB) drivers
588 device if_ntb # Virtual NTB network interface
589 device ntb_transport # NTB packet transport driver
590 device ntb # NTB hardware interface
591 device ntb_hw_amd # AMD NTB hardware driver
592 device ntb_hw_intel # Intel NTB hardware driver
593 device ntb_hw_plx # PLX NTB hardware driver
601 # Areca 11xx and 12xx series of SATA II RAID controllers.
604 device arcmsr # Areca SATA II RAID
607 # Adaptec FSA RAID controllers, including integrated DELL controllers,
608 # the Dell PERC 2/QC and the HP NetRAID-4M
610 device aacp # SCSI Passthrough interface (optional, CAM required)
613 # Adaptec by PMC RAID controllers, Series 6/7/8 and upcoming families
614 device aacraid # Container interface, CAM required
617 # Highpoint RocketRAID 27xx.
621 # Highpoint RocketRAID 182x.
625 # Highpoint DC7280 and R750.
629 # Highpoint RocketRAID. Supports RR172x, RR222x, RR2240, RR232x, RR2340,
630 # RR2210, RR174x, RR2522, RR231x, RR230x.
634 # Highpoint RocketRaid 3xxx series SATA RAID
638 # Intel integrated Memory Controller (iMC) SMBus controller
639 # Sandybridge-Xeon, Ivybridge-Xeon, Haswell-Xeon, Broadwell-Xeon
643 # IBM (now Adaptec) ServeRAID controllers
647 # Intel C600 (Patsburg) integrated SAS controller
649 options ISCI_LOGGING # enable debugging in isci HAL
652 # NVM Express (NVMe) support
653 device nvme # base NVMe driver
654 device nvd # expose NVMe namespaces as disks, depends on nvme
657 # Intel Volume Management Device (VMD) support
661 # PMC-Sierra SAS/SATA controller
664 # SafeNet crypto driver: can be moved to the MI NOTES as soon as
665 # it's tested on a big-endian machine
667 device safe # SafeNet 1141
668 options SAFE_DEBUG # enable debugging support: hw.safe.debug
669 options SAFE_RNDTEST # enable rndtest support
672 # glxiic is an I2C driver for the AMD Geode LX CS5536 System Management Bus
673 # controller. Requires 'device iicbus'.
675 device glxiic # AMD Geode LX CS5536 System Management Bus
678 # glxsb is a driver for the Security Block in AMD Geode LX processors.
679 # Requires 'device crypto'.
681 device glxsb # AMD Geode LX Security Block
686 # The virtio entry provides a generic bus for use by the device drivers.
687 # It must be combined with an interface that communicates with the host.
688 # Multiple such interfaces defined by the VirtIO specification. FreeBSD
689 # only has support for PCI. Therefore, virtio_pci must be statically
690 # compiled in or loaded as a module for the device drivers to function.
692 device virtio # Generic VirtIO bus (required)
693 device virtio_pci # VirtIO PCI Interface
694 device vtnet # VirtIO Ethernet device
695 device virtio_blk # VirtIO Block device
696 device virtio_scsi # VirtIO SCSI device
697 device virtio_balloon # VirtIO Memory Balloon device
698 device virtio_random # VirtIO Entropy device
699 device virtio_console # VirtIO Console device
701 # Linux KVM paravirtualization support
702 device kvm_clock # KVM paravirtual clock driver
705 device hyperv # HyperV drivers
707 #####################################################################
710 # Miscellaneous hardware:
712 # ipmi: Intelligent Platform Management Interface
713 # smapi: System Management Application Program Interface driver
714 # smbios: DMI/SMBIOS entry point
715 # vpd: Vital Product Data kernel interface
716 # pbio: Parallel (8255 PPI) basic I/O (mode 0) port (e.g. Advantech PCL-724)
717 # asmc: Apple System Management Controller
718 # si: Specialix International SI/XIO or SX intelligent serial card driver
719 # tpm: Trusted Platform Module
721 # Notes on the Specialix SI/XIO driver:
722 # The host card is memory, not IO mapped.
723 # The Rev 1 host cards use a 64K chunk, on a 32K boundary.
724 # The Rev 2 host cards use a 32K chunk, on a 32K boundary.
725 # The cards can use an IRQ of 11, 12 or 15.
727 # Notes on the Sony Programmable I/O controller
728 # This is a temporary driver that should someday be replaced by something
729 # that hooks into the ACPI layer. The device is hooked to the PIIX4's
730 # General Device 10 decoder, which means you have to fiddle with PCI
731 # registers to map it in, even though it is otherwise treated here as
732 # an ISA device. At the moment, the driver polls, although the device
733 # is capable of generating interrupts. It largely undocumented.
734 # The port location in the hint is where you WANT the device to be
735 # mapped. 0x10a0 seems to be traditional. At the moment the jogdial
736 # is the only thing truly supported, but apparently a fair percentage
737 # of the Vaio extra features are controlled by this device.
744 envvar hint.pbio.0.at="isa"
745 envvar hint.pbio.0.port="0x360"
748 device padlock_rng # VIA Padlock RNG
749 device rdrand_rng # Intel Bull Mountain RNG
750 device aesni # AES-NI OpenCrypto module
751 device ossl # OpenSSL OpenCrypto module
754 # Laptop/Notebook options:
757 # apm under `Miscellaneous hardware'
762 # For older notebooks that signal a powerfail condition (external
763 # power supply dropped, or battery state low) by issuing an NMI:
765 options POWERFAIL_NMI # make it beep instead of panicing
770 # Philips i2c bus support is provided by the `iicbus' device.
772 # Supported interfaces:
773 # pcf Philips PCF8584 ISA-bus controller
776 envvar hint.pcf.0.at="isa"
777 envvar hint.pcf.0.port="0x320"
778 envvar hint.pcf.0.irq="5"
781 # Hardware watchdog timers:
783 # ichwd: Intel ICH watchdog timer
784 # amdsbwd: AMD SB7xx watchdog timer
785 # viawd: VIA south bridge watchdog timer
786 # wbwd: Winbond watchdog timer
787 # itwd: ITE Super I/O watchdog timer
796 # Temperature sensors:
798 # coretemp: on-die sensor on Intel Core and newer CPUs
799 # amdtemp: on-die sensor on AMD K8/K10/K11 CPUs
805 # CPU control pseudo-device. Provides access to MSRs, CPUID info and
806 # microcode update feature.
816 # System Management Bus (SMB)
818 options ENABLE_ALART # Control alarm on Intel intpm driver
821 # Set the number of PV entries per process. Increasing this can
822 # stop panics related to heavy use of shared memory. However, that can
823 # (combined with large amounts of physical memory) cause panics at
824 # boot time due the kernel running out of VM space.
826 # If you're tweaking this, you might also want to increase the sysctls
827 # "vm.v_free_min", "vm.v_free_reserved", and "vm.v_free_target".
829 # The value below is the one more than the default.
831 options PMAP_SHPGPERPROC=201
834 # Number of initial kernel page table pages used for early bootstrap.
835 # This number should include enough pages to map the kernel, any
836 # modules or other data loaded with the kernel by the loader, and data
837 # structures allocated before the VM system is initialized such as the
838 # vm_page_t array. Each page table page maps 4MB (2MB with PAE).
843 # HID-over-I2C support
845 device iichid # HID-over-I2C support
846 options IICHID_DEBUG # Enable HID-over-I2C debug messages
847 options IICHID_SAMPLING # Workaround missing GPIO INTR support
849 #####################################################################
852 # Enable (32-bit) a.out binary support
855 #####################################################################
858 # KSTACK_PAGES is the number of memory pages to assign to the kernel
859 # stack of each thread.
861 options KSTACK_PAGES=5
863 # Enable detailed accounting by the PV entry allocator.
867 #####################################################################
869 # More undocumented options for linting.
870 # Note that documenting these are not considered an affront.
872 options KBDIO_DEBUG=2
873 options KBD_MAXRETRY=4
874 options KBD_MAXWAIT=6
875 options KBD_RESETDELAY=201
879 options TIMER_FREQ=((14318182+6)/12)
882 options VM_KMEM_SIZE_MAX
883 options VM_KMEM_SIZE_SCALE
886 #####################################################################
887 # Items broken on i386 that are generally available elsewhere
889 # Device uses bus_read_8 and friends, so can't work. Remove it from lint.