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 # We want LINT to cover profiling as well.
15 #####################################################################
20 # IPI_PREEMPTION instructs the kernel to preempt threads running on other
21 # CPUS if needed. Relies on the PREEMPTION option
24 options IPI_PREEMPTION
25 device atpic # Optional legacy pic support
26 device mptable # Optional MPSPEC mptable support
36 options STOP_NMI # Stop CPUS using NMI instead of IPI
40 #####################################################################
44 # You must specify at least one CPU (the one you intend to run on);
45 # deleting the specification for CPUs you don't need to use may make
46 # parts of the system run faster.
48 cpu HAMMER # aka K8, aka Opteron & Athlon64
51 # Options for CPU features.
55 # PERFMON causes the driver for Pentium/Pentium Pro performance counters
56 # to be compiled. See perfmon(4) for more information.
61 #####################################################################
65 # DEVICE_POLLING adds support for mixed interrupt-polling handling
66 # of network device drivers, which has significant benefits in terms
67 # of robustness to overloads and responsivity, as well as permitting
68 # accurate scheduling of the CPU time between kernel network processing
69 # and other activities. The drawback is a moderate (up to 1/HZ seconds)
70 # potential increase in response times.
71 # It is strongly recommended to use HZ=1000 or 2000 with DEVICE_POLLING
72 # to achieve smoother behaviour.
73 # Additionally, you can enable/disable polling at runtime with help of
74 # the ifconfig(8) utility, and select the CPU fraction reserved to
75 # userland with the sysctl variable kern.polling.user_frac
76 # (default 50, range 0..100).
78 # Not all device drivers support this mode of operation at the time of
79 # this writing. See polling(4) for more details.
81 options DEVICE_POLLING
84 #####################################################################
87 # The following options are used for debugging clock behavior only, and
88 # should not be used for production systems.
90 # CLK_CALIBRATION_LOOP causes clock calibration to be run in a loop at
91 # startup until the user presses a key. (The i8254 clock is always
92 # calibrated relative to the RTC (mc146818a) and this option causes the
93 # calibration to be repeated.)
94 options CLK_CALIBRATION_LOOP
96 # CLK_USE_I8254_CALIBRATION causes the calibrated frequency of the i8254
97 # clock to actually be used.
98 options CLK_USE_I8254_CALIBRATION
101 #####################################################################
102 # MISCELLANEOUS DEVICES AND OPTIONS
105 # sio: serial ports (see sio(4)), including support for various
106 # PC Card devices, such as Modem and NICs (see etc/defaults/pccard.conf)
110 hint.sio.0.port="0x3F8"
111 hint.sio.0.flags="0x10"
114 # `flags' specific to sio(4).
115 # 0x10 enable console support for this unit. Other console flags
116 # (if applicable) are ignored unless this is set. Enabling
117 # console support does not make the unit the preferred console.
118 # Boot with -h or set boot_serial=YES in the loader. For sio(4)
119 # specifically, the 0x20 flag can also be set (see above).
120 # Currently, at most one unit can have console support; the
121 # first one (in config file order) with this flag set is
122 # preferred. Setting this flag for sio0 gives the old behaviour.
123 # 0x20 force this unit to be the console (unless there is another
124 # higher priority console). This replaces the COMCONSOLE option.
125 # 0x40 reserve this unit for low level console operations. Do not
126 # access the device in any normal way.
127 # 0x80 use this port for serial line gdb support in ddb. Also known
130 # 0x1 disable probing of this device. Used to prevent your modem
131 # from being attached as a PnP modem.
132 # Other flags for sio that aren't documented in the man page.
133 # 0x20000 enable hardware RTS/CTS and larger FIFOs. Only works for
134 # ST16650A-compatible UARTs.
137 options COM_ESP # Code for Hayes ESP.
138 options COM_MULTIPORT # Code for some cards with shared IRQs.
139 options CONSPEED=115200 # Speed for serial console
142 device speaker #Play IBM BASIC-style noises out your speaker
143 hint.speaker.0.at="isa"
144 hint.speaker.0.port="0x61"
145 device gzip #Exec gzipped a.out's. REQUIRES COMPAT_AOUT!
148 #####################################################################
149 # HARDWARE BUS CONFIGURATION
159 # AUTO_EOI_1 enables the `automatic EOI' feature for the master 8259A
160 # interrupt controller. This saves about 0.7-1.25 usec for each interrupt.
161 # This option breaks suspend/resume on some portables.
163 # AUTO_EOI_2 enables the `automatic EOI' feature for the slave 8259A
164 # interrupt controller. This saves about 0.7-1.25 usec for each interrupt.
165 # Automatic EOI is documented not to work for for the slave with the
166 # original i8259A, but it works for some clones and some integrated
169 # MAXMEM specifies the amount of RAM on the machine; if this is not
170 # specified, FreeBSD will first read the amount of memory from the CMOS
171 # RAM, so the amount of memory will initially be limited to 64MB or 16MB
172 # depending on the BIOS. If the BIOS reports 64MB, a memory probe will
173 # then attempt to detect the installed amount of RAM. If this probe
174 # fails to detect >64MB RAM you will have to use the MAXMEM option.
175 # The amount is in kilobytes, so for a machine with 128MB of RAM, it would
176 # be 131072 (128 * 1024).
178 # BROKEN_KEYBOARD_RESET disables the use of the keyboard controller to
179 # reset the CPU for reboot. This is needed on some systems with broken
180 # keyboard controllers.
185 options MAXMEM=(128*1024)
186 #options BROKEN_KEYBOARD_RESET
189 # PCI bus & PCI options:
198 #####################################################################
199 # HARDWARE DEVICE CONFIGURATION
205 # 3Dfx Voodoo Graphics, Voodoo II /dev/3dfx CDEV support. This will create
206 # the /dev/3dfx0 device to work with glide implementations. This should get
207 # linked to /dev/3dfx and /dev/voodoo. Note that this is not the same as
208 # the tdfx DRI module from XFree86 and is completely unrelated.
210 # To enable Linuxulator support, one must also include COMPAT_LINUX in the
211 # config as well. The other option is to load both as modules.
213 device tdfx # Enable 3Dfx Voodoo support
214 #XXX#device tdfx_linux # Enable Linuxulator support
217 # ACPI support using the Intel ACPI Component Architecture reference
220 # ACPI_DEBUG enables the use of the debug.acpi.level and debug.acpi.layer
221 # kernel environment variables to select initial debugging levels for the
222 # Intel ACPICA code. (Note that the Intel code must also have USE_DEBUGGER
223 # defined when it is built).
225 # ACPI_NO_SEMAPHORES makes the AcpiOs*Semaphore routines a no-op.
227 # ACPICA_PEDANTIC enables strict checking of AML. Our default is to
228 # relax these checks to allow code generated by the Microsoft compiler
231 # Note that building ACPI into the kernel is deprecated; the module is
232 # normally loaded automatically by the loader.
236 #!options ACPI_NO_SEMAPHORES
237 #!options ACPICA_PEDANTIC
239 # The cpufreq(4) driver provides support for non-ACPI CPU frequency control
242 # Direct Rendering modules for 3D acceleration.
243 device drm # DRM core module required by DRM drivers
244 device i915drm # Intel i830 through i915
245 device mach64drm # ATI Rage Pro, Rage Mobility P/M, Rage XL
246 device mgadrm # AGP Matrox G200, G400, G450, G550
247 device r128drm # ATI Rage 128
248 device radeondrm # ATI Radeon
249 device savagedrm # S3 Savage3D, Savage4
250 device sisdrm # SiS 300/305, 540, 630
251 device tdfxdrm # 3dfx Voodoo 3/4/5 and Banshee
252 options DRM_DEBUG # Include debug printfs (slow)
255 # Network interfaces:
258 # ath: Atheros a/b/g WiFi adapters (requires ath_hal and wlan)
259 # ed: Western Digital and SMC 80xx; Novell NE1000 and NE2000; 3Com 3C503
260 # HP PC Lan+, various PC Card devices (refer to etc/defaults/pccard.conf)
262 # ipw: Intel PRO/Wireless 2100 IEEE 802.11 adapter
263 # iwi: Intel PRO/Wireless 2200BG/2225BG/2915ABG IEEE 802.11 adapters
264 # nfe: nVidia nForce MCP on-board Ethernet Networking (BSD open source)
265 # nve: nVidia nForce MCP on-board Ethernet Networking
266 # ral: Ralink Technology IEEE 802.11 wireless adapter
267 # ural: Ralink Technology RT2500USB IEEE 802.11 wireless adapter
275 device nfe # nVidia nForce MCP on-board Ethernet Networking
276 device nve # nVidia nForce MCP on-board Ethernet Networking
281 device ath_hal # Atheros HAL (includes binary component)
282 #device ath_rate_amrr # AMRR rate control for ath driver
283 #device ath_rate_onoe # Onoe rate control for ath driver
284 device ath_rate_sample # SampleRate rate control for the ath driver
285 #device wlan # 802.11 layer
288 #XXX this stores pointers in a 32bit field that is defined by the hardware
292 # Areca 11xx and 12xx series of SATA II RAID controllers.
295 device arcmsr # Areca SATA II RAID
298 # 3ware 9000 series PATA/SATA RAID controller driver and options.
299 # The driver is implemented as a SIM, and so, needs the CAM infrastructure.
301 options TWA_DEBUG # 0-10; 10 prints the most messages.
302 options TWA_FLASH_FIRMWARE # firmware image bundled when defined.
303 device twa # 3ware 9000 series PATA/SATA RAID
306 # SCSI host adapters:
308 # ncv: NCR 53C500 based SCSI host adapters.
309 # nsp: Workbit Ninja SCSI-3 based PC Card SCSI host adapters.
310 # stg: TMC 18C30, 18C50 based SCSI host adapters.
317 # Adaptec FSA RAID controllers, including integrated DELL controllers,
318 # the Dell PERC 2/QC and the HP NetRAID-4M
320 device aacp # SCSI Passthrough interface (optional, CAM required)
323 # Highpoint RocketRAID 182x. This is really just software RAID on a
328 # Highpoint RocketRAID 232x. This is software RAID but with hardware
329 # acceleration assistance for RAID_5.
333 # IBM (now Adaptec) ServeRAID controllers
337 # SafeNet crypto driver: can be moved to the MI NOTES as soon as
338 # it's tested on a big-endian machine
340 device safe # SafeNet 1141
341 options SAFE_DEBUG # enable debugging support: hw.safe.debug
342 options SAFE_RNDTEST # enable rndtest support
344 #####################################################################
347 # Miscellaneous hardware:
349 # smbios: DMI/SMBIOS entry point
350 # vpd: Vital Product Data kernel interface
351 # cy: Cyclades serial driver
352 # digi: Digiboard driver
354 # Notes on the Specialix SI/XIO driver:
355 # The host card is memory, not IO mapped.
356 # The Rev 1 host cards use a 64K chunk, on a 32K boundary.
357 # The Rev 2 host cards use a 32K chunk, on a 32K boundary.
358 # The cards can use an IRQ of 11, 12 or 15.
361 options CY_PCI_FASTINTR # Use with cy_pci unless irq is shared
363 # BIOS & FEP/OS components of device digi.
371 # Parallel (8255 PPI) basic I/O (mode 0) port (e.g. Advantech PCL-724)
374 hint.pbio.0.port="0x360"
377 # HOT1 Xilinx 6200 card (http://www.vcc.com/)
381 # Laptop/Notebook options:
390 # Hardware watchdog timers:
392 # ichwd: Intel ICH watchdog timer
396 #---------------------------------------------------------------------------
399 # See /usr/share/examples/isdn/ROADMAP for an introduction to isdn4bsd.
401 # i4b passive ISDN cards support contains the following hardware drivers:
403 # isic - Siemens/Infineon ISDN ISAC/HSCX/IPAC chipset driver
404 # iwic - Winbond W6692 PCI bus ISDN S/T interface controller
405 # ifpi - AVM Fritz!Card PCI driver
406 # ifpi2 - AVM Fritz!Card PCI version 2 driver
407 # itjc - Siemens ISAC / TJNet Tiger300/320 chipset
409 # i4b active ISDN cards support contains the following hardware drivers:
411 # iavc - AVM B1 PCI, AVM B1 ISA, AVM T1
413 # Note that the ``options'' (if given) and ``device'' lines must BOTH
414 # be uncommented to enable support for a given card !
416 # In addition to a hardware driver (and probably an option) the mandatory
417 # ISDN protocol stack devices and the mandatory support device must be
418 # enabled as well as one or more devices from the optional devices section.
420 #---------------------------------------------------------------------------
421 # isic driver (Siemens/Infineon chipsets)
428 # ELSA MicroLink ISDN/PCI (same as ELSA QuickStep 1000pro PCI)
431 #---------------------------------------------------------------------------
432 # ifpi2 driver for AVM Fritz!Card PCI version 2
434 # AVM Fritz!Card PCI version 2
437 #---------------------------------------------------------------------------
438 # iwic driver for Winbond W6692 chipset
440 # ASUSCOM P-IN100-ST-D (and other Winbond W6692 based cards)
443 #---------------------------------------------------------------------------
444 # itjc driver for Siemens ISAC / TJNet Tiger300/320 chipset
446 # Traverse Technologies NETjet-S
450 #---------------------------------------------------------------------------
451 # iavc driver (AVM active cards, needs i4bcapi driver!)
455 #---------------------------------------------------------------------------
456 # ISDN Protocol Stack - mandatory for all hardware drivers
458 # Q.921 / layer 2 - i4b passive cards D channel handling
461 # Q.931 / layer 3 - i4b passive cards D channel handling
464 # layer 4 - i4b common passive and active card handling
467 #---------------------------------------------------------------------------
468 # ISDN devices - mandatory for all hardware drivers
470 # userland driver to do ISDN tracing (for passive cards only)
472 #XXX#options NI4BTRC=4
474 # userland driver to control the whole thing
477 #---------------------------------------------------------------------------
478 # ISDN devices - optional
480 # userland driver for access to raw B channel
482 #XXX#options NI4BRBCH=4
484 # userland driver for telephony
486 #XXX#options NI4BTEL=2
488 # network driver for IP over raw HDLC ISDN
490 #XXX#options NI4BIPR=4
491 # enable VJ header compression detection for ipr i/f
493 # enable logging of the first n IP packets to isdnd (n=32 here)
496 # network driver for sync PPP over ISDN; requires an equivalent
497 # number of sppp device to be configured
499 #XXX#options NI4BISPPP=4
501 # B-channel interface to the netgraph subsystem
503 #XXX#options NI4BING=2
505 # CAPI driver needed for active ISDN cards (see iavc driver above)
508 #---------------------------------------------------------------------------
511 # System Management Bus (SMB)
513 options ENABLE_ALART # Control alarm on Intel intpm driver
516 # Set the number of PV entries per process. Increasing this can
517 # stop panics related to heavy use of shared memory. However, that can
518 # (combined with large amounts of physical memory) cause panics at
519 # boot time due the kernel running out of VM space.
521 # If you're tweaking this, you might also want to increase the sysctls
522 # "vm.v_free_min", "vm.v_free_reserved", and "vm.v_free_target".
524 # The value below is the one more than the default.
526 options PMAP_SHPGPERPROC=201
529 #####################################################################
532 #XXX keep these here for now and reactivate when support for emulating
533 #XXX these 32 bit binaries is added.
535 # Enable 32-bit runtime support for FreeBSD/i386 binaries.
538 # Enable iBCS2 runtime support for SCO and ISC binaries
541 # Emulate spx device for client side of SVR3 local X interface
542 #XXX#options SPX_HACK
544 # Enable Linux ABI emulation
545 #XXX#options COMPAT_LINUX
547 # Enable 32-bit Linux ABI emulation (requires COMPAT_43 and COMPAT_IA32)
548 options COMPAT_LINUX32
550 # Enable the linux-like proc filesystem support (requires COMPAT_LINUX32
554 #Enable the linux-like sys filesystem support (requires COMPAT_LINUX32
559 # SysVR4 ABI emulation
561 # The svr4 ABI emulator can be statically compiled into the kernel or loaded as
563 # The STREAMS network emulation code can also be compiled statically or as a
564 # module. If loaded as a module, it must be loaded before the svr4 module
565 # (the /usr/sbin/svr4 script does this for you). If compiling statically,
566 # the `streams' device must be configured into any kernel which also
567 # specifies COMPAT_SVR4. It is possible to have a statically-configured
568 # STREAMS device and a dynamically loadable svr4 emulator; the /usr/sbin/svr4
569 # script understands that it doesn't need to load the `streams' module under
570 # those circumstances.
571 # Caveat: At this time, `options KTRACE' is required for the svr4 emulator
572 # (whether static or dynamic).
574 #XXX#options COMPAT_SVR4 # build emulator statically
575 #XXX#options DEBUG_SVR4 # enable verbose debugging
576 #XXX#device streams # STREAMS network driver (required for svr4).
579 #####################################################################
582 # KSTACK_PAGES is the number of memory pages to assign to the kernel
583 # stack of each thread.
585 options KSTACK_PAGES=3
587 #####################################################################
589 # More undocumented options for linting.
590 # Note that documenting these are not considered an affront.
592 options FB_INSTALL_CDEV # install a CDEV entry in /dev
594 options KBDIO_DEBUG=2
595 options KBD_MAXRETRY=4
596 options KBD_MAXWAIT=6
597 options KBD_RESETDELAY=201
601 options TIMER_FREQ=((14318182+6)/12)
604 options VM_KMEM_SIZE_MAX
605 options VM_KMEM_SIZE_SCALE
607 # Enable NDIS binary driver support