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
83 # BPF_JITTER adds support for BPF just-in-time compiler.
88 #####################################################################
91 # Provide read/write access to the memory in the clock chip.
92 device nvram # Access to rtc cmos via /dev/nvram
95 #####################################################################
96 # MISCELLANEOUS DEVICES AND OPTIONS
98 device speaker #Play IBM BASIC-style noises out your speaker
99 hint.speaker.0.at="isa"
100 hint.speaker.0.port="0x61"
101 device gzip #Exec gzipped a.out's. REQUIRES COMPAT_AOUT!
104 #####################################################################
105 # HARDWARE BUS CONFIGURATION
115 # AUTO_EOI_1 enables the `automatic EOI' feature for the master 8259A
116 # interrupt controller. This saves about 0.7-1.25 usec for each interrupt.
117 # This option breaks suspend/resume on some portables.
119 # AUTO_EOI_2 enables the `automatic EOI' feature for the slave 8259A
120 # interrupt controller. This saves about 0.7-1.25 usec for each interrupt.
121 # Automatic EOI is documented not to work for for the slave with the
122 # original i8259A, but it works for some clones and some integrated
125 # MAXMEM specifies the amount of RAM on the machine; if this is not
126 # specified, FreeBSD will first read the amount of memory from the CMOS
127 # RAM, so the amount of memory will initially be limited to 64MB or 16MB
128 # depending on the BIOS. If the BIOS reports 64MB, a memory probe will
129 # then attempt to detect the installed amount of RAM. If this probe
130 # fails to detect >64MB RAM you will have to use the MAXMEM option.
131 # The amount is in kilobytes, so for a machine with 128MB of RAM, it would
132 # be 131072 (128 * 1024).
134 # BROKEN_KEYBOARD_RESET disables the use of the keyboard controller to
135 # reset the CPU for reboot. This is needed on some systems with broken
136 # keyboard controllers.
141 options MAXMEM=(128*1024)
142 #options BROKEN_KEYBOARD_RESET
145 # 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).
236 # ACPI_NO_SEMAPHORES makes the AcpiOs*Semaphore routines a no-op.
240 #!options ACPI_NO_SEMAPHORES
242 # The cpufreq(4) driver provides support for non-ACPI CPU frequency control
245 # Direct Rendering modules for 3D acceleration.
246 device drm # DRM core module required by DRM drivers
247 device i915drm # Intel i830 through i915
248 device mach64drm # ATI Rage Pro, Rage Mobility P/M, Rage XL
249 device mgadrm # AGP Matrox G200, G400, G450, G550
250 device r128drm # ATI Rage 128
251 device radeondrm # ATI Radeon
252 device savagedrm # S3 Savage3D, Savage4
253 device sisdrm # SiS 300/305, 540, 630
254 device tdfxdrm # 3dfx Voodoo 3/4/5 and Banshee
255 options DRM_DEBUG # Include debug printfs (slow)
258 # Network interfaces:
261 # ath: Atheros a/b/g WiFi adapters (requires ath_hal and wlan)
262 # ed: Western Digital and SMC 80xx; Novell NE1000 and NE2000; 3Com 3C503
263 # HP PC Lan+, various PC Card devices
265 # ipw: Intel PRO/Wireless 2100 IEEE 802.11 adapter
266 # iwi: Intel PRO/Wireless 2200BG/2225BG/2915ABG IEEE 802.11 adapters
267 # iwn: Intel Wireless WiFi Link 4965AGN 802.11 network adapters
268 # nfe: nVidia nForce MCP on-board Ethernet Networking (BSD open source)
269 # nve: nVidia nForce MCP on-board Ethernet Networking
270 # ral: Ralink Technology IEEE 802.11 wireless adapter
271 # ural: Ralink Technology RT2500USB IEEE 802.11 wireless adapter
272 # wpi: Intel 3945ABG Wireless LAN controller
281 device nfe # nVidia nForce MCP on-board Ethernet Networking
282 device nve # nVidia nForce MCP on-board Ethernet Networking
288 device ath_hal # Atheros HAL (includes binary component)
289 #device ath_rate_amrr # AMRR rate control for ath driver
290 #device ath_rate_onoe # Onoe rate control for ath driver
291 device ath_rate_sample # SampleRate rate control for the ath driver
292 #device wlan # 802.11 layer
295 #XXX this stores pointers in a 32bit field that is defined by the hardware
299 # Areca 11xx and 12xx series of SATA II RAID controllers.
302 device arcmsr # Areca SATA II RAID
305 # 3ware 9000 series PATA/SATA RAID controller driver and options.
306 # The driver is implemented as a SIM, and so, needs the CAM infrastructure.
308 options TWA_DEBUG # 0-10; 10 prints the most messages.
309 options TWA_FLASH_FIRMWARE # firmware image bundled when defined.
310 device twa # 3ware 9000 series PATA/SATA RAID
313 # SCSI host adapters:
315 # ncv: NCR 53C500 based SCSI host adapters.
316 # nsp: Workbit Ninja SCSI-3 based PC Card SCSI host adapters.
317 # stg: TMC 18C30, 18C50 based SCSI host adapters.
324 # Adaptec FSA RAID controllers, including integrated DELL controllers,
325 # the Dell PERC 2/QC and the HP NetRAID-4M
327 device aacp # SCSI Passthrough interface (optional, CAM required)
330 # Highpoint RocketRAID 182x.
334 # Highpoint RocketRAID. Supports RR172x, RR222x, RR2240, RR232x, RR2340,
335 # RR2210, RR174x, RR2522, RR231x, RR230x.
339 # Highpoint RocketRaid 3xxx series SATA RAID
343 # IBM (now Adaptec) ServeRAID controllers
347 # SafeNet crypto driver: can be moved to the MI NOTES as soon as
348 # it's tested on a big-endian machine
350 device safe # SafeNet 1141
351 options SAFE_DEBUG # enable debugging support: hw.safe.debug
352 options SAFE_RNDTEST # enable rndtest support
354 #####################################################################
357 # Miscellaneous hardware:
359 # ipmi: Intelligent Platform Management Interface
360 # smbios: DMI/SMBIOS entry point
361 # vpd: Vital Product Data kernel interface
362 # asmc: Apple System Management Controller
364 # Notes on the Specialix SI/XIO driver:
365 # The host card is memory, not IO mapped.
366 # The Rev 1 host cards use a 64K chunk, on a 32K boundary.
367 # The Rev 2 host cards use a 32K chunk, on a 32K boundary.
368 # The cards can use an IRQ of 11, 12 or 15.
371 # Parallel (8255 PPI) basic I/O (mode 0) port (e.g. Advantech PCL-724)
374 hint.pbio.0.port="0x360"
379 # Laptop/Notebook options:
388 # Hardware watchdog timers:
390 # ichwd: Intel ICH watchdog timer
395 # Temperature sensors:
397 # coretemp: on-die sensor on Intel Core and newer CPUs
398 # k8temp: on-die sensor on AMD K8 CPUs
404 # CPU control pseudo-device. Provides access to MSRs, CPUID info and
405 # microcode update feature.
410 # System Management Bus (SMB)
412 options ENABLE_ALART # Control alarm on Intel intpm driver
415 # Set the number of PV entries per process. Increasing this can
416 # stop panics related to heavy use of shared memory. However, that can
417 # (combined with large amounts of physical memory) cause panics at
418 # boot time due the kernel running out of VM space.
420 # If you're tweaking this, you might also want to increase the sysctls
421 # "vm.v_free_min", "vm.v_free_reserved", and "vm.v_free_target".
423 # The value below is the one more than the default.
425 options PMAP_SHPGPERPROC=201
428 #####################################################################
431 #XXX keep these here for now and reactivate when support for emulating
432 #XXX these 32 bit binaries is added.
434 # Enable 32-bit runtime support for FreeBSD/i386 binaries.
437 # Enable iBCS2 runtime support for SCO and ISC binaries
440 # Emulate spx device for client side of SVR3 local X interface
441 #XXX#options SPX_HACK
443 # Enable Linux ABI emulation
444 #XXX#options COMPAT_LINUX
446 # Enable 32-bit Linux ABI emulation (requires COMPAT_43 and COMPAT_IA32)
447 options COMPAT_LINUX32
449 # Enable the linux-like proc filesystem support (requires COMPAT_LINUX32
453 #Enable the linux-like sys filesystem support (requires COMPAT_LINUX32
458 # SysVR4 ABI emulation
460 # The svr4 ABI emulator can be statically compiled into the kernel or loaded as
462 # The STREAMS network emulation code can also be compiled statically or as a
463 # module. If loaded as a module, it must be loaded before the svr4 module
464 # (the /usr/sbin/svr4 script does this for you). If compiling statically,
465 # the `streams' device must be configured into any kernel which also
466 # specifies COMPAT_SVR4. It is possible to have a statically-configured
467 # STREAMS device and a dynamically loadable svr4 emulator; the /usr/sbin/svr4
468 # script understands that it doesn't need to load the `streams' module under
469 # those circumstances.
470 # Caveat: At this time, `options KTRACE' is required for the svr4 emulator
471 # (whether static or dynamic).
473 #XXX#options COMPAT_SVR4 # build emulator statically
474 #XXX#options DEBUG_SVR4 # enable verbose debugging
475 #XXX#device streams # STREAMS network driver (required for svr4).
478 #####################################################################
481 # KSTACK_PAGES is the number of memory pages to assign to the kernel
482 # stack of each thread.
484 options KSTACK_PAGES=3
486 #####################################################################
488 # More undocumented options for linting.
489 # Note that documenting these are not considered an affront.
491 options FB_INSTALL_CDEV # install a CDEV entry in /dev
493 options KBDIO_DEBUG=2
494 options KBD_MAXRETRY=4
495 options KBD_MAXWAIT=6
496 options KBD_RESETDELAY=201
500 options TIMER_FREQ=((14318182+6)/12)
503 options VM_KMEM_SIZE_MAX
504 options VM_KMEM_SIZE_SCALE
506 # Enable NDIS binary driver support