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
35 #####################################################################
39 # You must specify at least one CPU (the one you intend to run on);
40 # deleting the specification for CPUs you don't need to use may make
41 # parts of the system run faster.
43 cpu HAMMER # aka K8, aka Opteron & Athlon64
46 # Options for CPU features.
50 # PERFMON causes the driver for Pentium/Pentium Pro performance counters
51 # to be compiled. See perfmon(4) for more information.
56 #####################################################################
60 # DEVICE_POLLING adds support for mixed interrupt-polling handling
61 # of network device drivers, which has significant benefits in terms
62 # of robustness to overloads and responsivity, as well as permitting
63 # accurate scheduling of the CPU time between kernel network processing
64 # and other activities. The drawback is a moderate (up to 1/HZ seconds)
65 # potential increase in response times.
66 # It is strongly recommended to use HZ=1000 or 2000 with DEVICE_POLLING
67 # to achieve smoother behaviour.
68 # Additionally, you can enable/disable polling at runtime with help of
69 # the ifconfig(8) utility, and select the CPU fraction reserved to
70 # userland with the sysctl variable kern.polling.user_frac
71 # (default 50, range 0..100).
73 # Not all device drivers support this mode of operation at the time of
74 # this writing. See polling(4) for more details.
76 options DEVICE_POLLING
78 # BPF_JITTER adds support for BPF just-in-time compiler.
83 #####################################################################
86 # Provide read/write access to the memory in the clock chip.
87 device nvram # Access to rtc cmos via /dev/nvram
90 #####################################################################
91 # MISCELLANEOUS DEVICES AND OPTIONS
93 device speaker #Play IBM BASIC-style noises out your speaker
94 hint.speaker.0.at="isa"
95 hint.speaker.0.port="0x61"
96 device gzip #Exec gzipped a.out's. REQUIRES COMPAT_AOUT!
99 #####################################################################
100 # HARDWARE BUS CONFIGURATION
110 # AUTO_EOI_1 enables the `automatic EOI' feature for the master 8259A
111 # interrupt controller. This saves about 0.7-1.25 usec for each interrupt.
112 # This option breaks suspend/resume on some portables.
114 # AUTO_EOI_2 enables the `automatic EOI' feature for the slave 8259A
115 # interrupt controller. This saves about 0.7-1.25 usec for each interrupt.
116 # Automatic EOI is documented not to work for for the slave with the
117 # original i8259A, but it works for some clones and some integrated
120 # MAXMEM specifies the amount of RAM on the machine; if this is not
121 # specified, FreeBSD will first read the amount of memory from the CMOS
122 # RAM, so the amount of memory will initially be limited to 64MB or 16MB
123 # depending on the BIOS. If the BIOS reports 64MB, a memory probe will
124 # then attempt to detect the installed amount of RAM. If this probe
125 # fails to detect >64MB RAM you will have to use the MAXMEM option.
126 # The amount is in kilobytes, so for a machine with 128MB of RAM, it would
127 # be 131072 (128 * 1024).
129 # BROKEN_KEYBOARD_RESET disables the use of the keyboard controller to
130 # reset the CPU for reboot. This is needed on some systems with broken
131 # keyboard controllers.
136 options MAXMEM=(128*1024)
137 #options BROKEN_KEYBOARD_RESET
140 # PCI bus & PCI options:
154 #####################################################################
155 # HARDWARE DEVICE CONFIGURATION
163 hint.psm.0.at="atkbdc"
167 options PSM_HOOKRESUME #hook the system resume event, useful
169 options PSM_RESETAFTERSUSPEND #reset the device at the resume event
171 # The keyboard controller; it controls the keyboard and the PS/2 mouse.
173 hint.atkbdc.0.at="isa"
174 hint.atkbdc.0.port="0x060"
178 hint.atkbd.0.at="atkbdc"
182 options ATKBD_DFLT_KEYMAP # specify the built-in keymap
183 makeoptions ATKBD_DFLT_KEYMAP=jp.106
186 # 0x01 Force detection of keyboard, else we always assume a keyboard
187 # 0x02 Don't reset keyboard, useful for some newer ThinkPads
188 # 0x03 Force detection and avoid reset, might help with certain
190 # 0x04 Old-style (XT) keyboard support, useful for older ThinkPads
192 # Video card driver for VGA adapters.
197 # Try the following option if the mouse pointer is not drawn correctly
198 # or font does not seem to be loaded properly. May cause flicker on
200 options VGA_ALT_SEQACCESS
202 # If you can dispense with some vga driver features, you may want to
203 # use the following options to save some memory.
204 #options VGA_NO_FONT_LOADING # don't save/load font
205 #options VGA_NO_MODE_CHANGE # don't change video modes
207 # Older video cards may require this option for proper operation.
208 options VGA_SLOW_IOACCESS # do byte-wide i/o's to TS and GDC regs
210 # The following option probably won't work with the LCD displays.
211 options VGA_WIDTH90 # support 90 column modes
216 # 3Dfx Voodoo Graphics, Voodoo II /dev/3dfx CDEV support. This will create
217 # the /dev/3dfx0 device to work with glide implementations. This should get
218 # linked to /dev/3dfx and /dev/voodoo. Note that this is not the same as
219 # the tdfx DRI module from XFree86 and is completely unrelated.
221 # To enable Linuxulator support, one must also include COMPAT_LINUX in the
222 # config as well. The other option is to load both as modules.
224 device tdfx # Enable 3Dfx Voodoo support
225 #XXX#device tdfx_linux # Enable Linuxulator support
228 # ACPI support using the Intel ACPI Component Architecture reference
231 # ACPI_DEBUG enables the use of the debug.acpi.level and debug.acpi.layer
232 # kernel environment variables to select initial debugging levels for the
233 # Intel ACPICA code. (Note that the Intel code must also have USE_DEBUGGER
234 # defined when it is built).
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 # ed: Western Digital and SMC 80xx; Novell NE1000 and NE2000; 3Com 3C503
259 # HP PC Lan+, various PC Card devices
261 # ipw: Intel PRO/Wireless 2100 IEEE 802.11 adapter
262 # iwi: Intel PRO/Wireless 2200BG/2225BG/2915ABG IEEE 802.11 adapters
263 # iwn: Intel Wireless WiFi Link 4965AGN 802.11 network 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 # wpi: Intel 3945ABG Wireless LAN controller
281 device ath # Atheros pci/cardbus NIC's
282 device ath_hal # pci/cardbus chip support
283 options AH_SUPPORT_AR5416 # enable AR5416 tx/rx descriptors
284 device ath_rate_sample # SampleRate tx rate control for ath
285 #device ath_rate_amrr # AMRR rate control for ath driver
286 #device ath_rate_onoe # Onoe rate control for ath driver
289 #XXX this stores pointers in a 32bit field that is defined by the hardware
293 # Areca 11xx and 12xx series of SATA II RAID controllers.
296 device arcmsr # Areca SATA II RAID
299 # 3ware 9000 series PATA/SATA RAID controller driver and options.
300 # The driver is implemented as a SIM, and so, needs the CAM infrastructure.
302 options TWA_DEBUG # 0-10; 10 prints the most messages.
303 options TWA_FLASH_FIRMWARE # firmware image bundled when defined.
304 device twa # 3ware 9000 series PATA/SATA RAID
307 # SCSI host adapters:
309 # ncv: NCR 53C500 based SCSI host adapters.
310 # nsp: Workbit Ninja SCSI-3 based PC Card SCSI host adapters.
311 # stg: TMC 18C30, 18C50 based SCSI host adapters.
318 # Adaptec FSA RAID controllers, including integrated DELL controllers,
319 # the Dell PERC 2/QC and the HP NetRAID-4M
321 device aacp # SCSI Passthrough interface (optional, CAM required)
324 # Highpoint RocketRAID 182x.
328 # Highpoint RocketRAID. Supports RR172x, RR222x, RR2240, RR232x, RR2340,
329 # RR2210, RR174x, RR2522, RR231x, RR230x.
333 # Highpoint RocketRaid 3xxx series SATA RAID
337 # IBM (now Adaptec) ServeRAID controllers
341 # SafeNet crypto driver: can be moved to the MI NOTES as soon as
342 # it's tested on a big-endian machine
344 device safe # SafeNet 1141
345 options SAFE_DEBUG # enable debugging support: hw.safe.debug
346 options SAFE_RNDTEST # enable rndtest support
348 #####################################################################
351 # Miscellaneous hardware:
353 # ipmi: Intelligent Platform Management Interface
354 # pbio: Parallel (8255 PPI) basic I/O (mode 0) port (e.g. Advantech PCL-724)
355 # smbios: DMI/SMBIOS entry point
356 # vpd: Vital Product Data kernel interface
357 # asmc: Apple System Management Controller
358 # si: Specialix International SI/XIO or SX intelligent serial card
360 # Notes on the Specialix SI/XIO driver:
361 # The host card is memory, not IO mapped.
362 # The Rev 1 host cards use a 64K chunk, on a 32K boundary.
363 # The Rev 2 host cards use a 32K chunk, on a 32K boundary.
364 # The cards can use an IRQ of 11, 12 or 15.
369 hint.pbio.0.port="0x360"
376 # Laptop/Notebook options:
385 # Hardware watchdog timers:
387 # ichwd: Intel ICH watchdog timer
392 # Temperature sensors:
394 # coretemp: on-die sensor on Intel Core and newer CPUs
395 # amdtemp: on-die sensor on AMD K8/K10/K11 CPUs
401 # CPU control pseudo-device. Provides access to MSRs, CPUID info and
402 # microcode update feature.
407 # System Management Bus (SMB)
409 options ENABLE_ALART # Control alarm on Intel intpm driver
412 # Set the number of PV entries per process. Increasing this can
413 # stop panics related to heavy use of shared memory. However, that can
414 # (combined with large amounts of physical memory) cause panics at
415 # boot time due the kernel running out of VM space.
417 # If you're tweaking this, you might also want to increase the sysctls
418 # "vm.v_free_min", "vm.v_free_reserved", and "vm.v_free_target".
420 # The value below is the one more than the default.
422 options PMAP_SHPGPERPROC=201
425 #####################################################################
428 #XXX keep these here for now and reactivate when support for emulating
429 #XXX these 32 bit binaries is added.
431 # Enable 32-bit runtime support for FreeBSD/i386 binaries.
434 # Enable iBCS2 runtime support for SCO and ISC binaries
437 # Emulate spx device for client side of SVR3 local X interface
438 #XXX#options SPX_HACK
440 # Enable Linux ABI emulation
441 #XXX#options COMPAT_LINUX
443 # Enable 32-bit Linux ABI emulation (requires COMPAT_43 and COMPAT_IA32)
444 options COMPAT_LINUX32
446 # Enable the linux-like proc filesystem support (requires COMPAT_LINUX32
450 #Enable the linux-like sys filesystem support (requires COMPAT_LINUX32
455 # SysVR4 ABI emulation
457 # The svr4 ABI emulator can be statically compiled into the kernel or loaded as
459 # The STREAMS network emulation code can also be compiled statically or as a
460 # module. If loaded as a module, it must be loaded before the svr4 module
461 # (the /usr/sbin/svr4 script does this for you). If compiling statically,
462 # the `streams' device must be configured into any kernel which also
463 # specifies COMPAT_SVR4. It is possible to have a statically-configured
464 # STREAMS device and a dynamically loadable svr4 emulator; the /usr/sbin/svr4
465 # script understands that it doesn't need to load the `streams' module under
466 # those circumstances.
467 # Caveat: At this time, `options KTRACE' is required for the svr4 emulator
468 # (whether static or dynamic).
470 #XXX#options COMPAT_SVR4 # build emulator statically
471 #XXX#options DEBUG_SVR4 # enable verbose debugging
472 #XXX#device streams # STREAMS network driver (required for svr4).
475 #####################################################################
478 # KSTACK_PAGES is the number of memory pages to assign to the kernel
479 # stack of each thread.
481 options KSTACK_PAGES=3
483 #####################################################################
485 # More undocumented options for linting.
486 # Note that documenting these are not considered an affront.
488 options FB_INSTALL_CDEV # install a CDEV entry in /dev
490 options KBDIO_DEBUG=2
491 options KBD_MAXRETRY=4
492 options KBD_MAXWAIT=6
493 options KBD_RESETDELAY=201
497 options TIMER_FREQ=((14318182+6)/12)
500 options VM_KMEM_SIZE_MAX
501 options VM_KMEM_SIZE_SCALE
503 # Enable NDIS binary driver support