NOTES (revision 4a5216a6dc0c3ce4cf5f2d3ee8af0c3ff3402c4f) - OpenGrok cross reference for /freebsd/sys/i386/conf/NOTES

#
# NOTES -- Lines that can be cut/pasted into kernel and hints configs.
#
# This file contains machine dependent kernel configuration notes.  For
# machine independent notes, look in /sys/conf/NOTES.
#
# $FreeBSD$
#

#
# We want LINT to cover profiling as well.
profile         2


#####################################################################
# SMP OPTIONS:
#
# The apic device enables the use of the I/O APIC for interrupt delivery.
# The apic device can be used in both UP and SMP kernels, but is required
# for SMP kernels.  Thus, the apic device is not strictly an SMP option,
# but it is a prerequisite for SMP.
#
# Notes:
#
# HTT CPUs should only be used if they are enabled in the BIOS.  For
# the ACPI case, ACPI only correctly tells us about any HTT CPUs if
# they are enabled.  However, most HTT systems do not list HTT CPUs
# in the MP Table if they are enabled, thus we guess at the HTT CPUs
# for the MP Table case.  However, we shouldn't try to guess and use
# these CPUs if HTT is disabled.  Thus, HTT guessing is only enabled
# for the MP Table if the user explicitly asks for it via the
# MPTABLE_FORCE_HTT option.  Do NOT use this option if you have HTT
# disabled in your BIOS.
#
# IPI_PREEMPTION instructs the kernel to preempt threads running on other
# CPUS if needed.  Relies on the PREEMPTION option

# Mandatory:
device		apic			# I/O apic

# Optional:
options 	MPTABLE_FORCE_HTT	# Enable HTT CPUs with the MP Table
options 	IPI_PREEMPTION

#
# Watchdog routines.
#
options 	MP_WATCHDOG

# Debugging options.
#
options		STOP_NMI		# Stop CPUS using NMI instead of IPI
options 	COUNT_XINVLTLB_HITS	# Counters for TLB events
options 	COUNT_IPIS		# Per-CPU IPI interrupt counters


#####################################################################
# CPU OPTIONS

#
# You must specify at least one CPU (the one you intend to run on);
# deleting the specification for CPUs you don't need to use may make
# parts of the system run faster.
#
cpu		I486_CPU
cpu		I586_CPU		# aka Pentium(tm)
cpu		I686_CPU		# aka Pentium Pro(tm)

#
# Options for CPU features.
#
# CPU_ATHLON_SSE_HACK tries to enable SSE instructions when the BIOS has
# forgotten to enable them.
#
# CPU_BLUELIGHTNING_3X enables triple-clock mode on IBM Blue Lightning
# CPU if CPU supports it.  The default is double-clock mode on
# BlueLightning CPU box.
#
# CPU_BLUELIGHTNING_FPU_OP_CACHE enables FPU operand cache on IBM
# BlueLightning CPU.  It works only with Cyrix FPU, and this option
# should not be used with Intel FPU.
#
# CPU_BTB_EN enables branch target buffer on Cyrix 5x86 (NOTE 1).
#
# CPU_CYRIX_NO_LOCK enables weak locking for the entire address space
# of Cyrix 6x86 and 6x86MX CPUs by setting the NO_LOCK bit of CCR1.
# Otherwise, the NO_LOCK bit of CCR1 is cleared.  (NOTE 3)
#
# CPU_DIRECT_MAPPED_CACHE sets L1 cache of Cyrix 486DLC CPU in direct
# mapped mode.  Default is 2-way set associative mode.
#
# CPU_DISABLE_5X86_LSSER disables load store serialize (i.e., enables
# reorder).  This option should not be used if you use memory mapped
# I/O device(s).
#
# CPU_DISABLE_CMPXCHG disables the CMPXCHG instruction on > i386 IA32
# machines.  VmWare 3.x seems to emulate this instruction poorly, causing
# the guest OS to run very slowly.  This problem appears to be fixed in
# VmWare 4.x, at least in version 4.5.2, so that enabling this option with
# VmWare 4.x will result in locking operations to be 20-30 times slower.
# Enabling this with an SMP kernel will cause the kernel to be unusable.
#
# CPU_DISABLE_SSE explicitly prevents I686_CPU from turning on SSE.
#
# CPU_ELAN enables support for AMDs ElanSC520 CPU.
#    CPU_ELAN_PPS enables precision timestamp code.
#    CPU_ELAN_XTAL sets the clock crystal frequency in Hz.
#
# CPU_ENABLE_LONGRUN enables support for Transmeta Crusoe LongRun
# technology which allows to restrict power consumption of the CPU by
# using group of hw.crusoe.* sysctls.
#
# CPU_FASTER_5X86_FPU enables faster FPU exception handler.
#
# CPU_GEODE is for the SC1100 Geode embedded processor.  This option
# is necessary because the i8254 timecounter is toast.
#
# CPU_I486_ON_386 enables CPU cache on i486 based CPU upgrade products
# for i386 machines.
#
# CPU_IORT defines I/O clock delay time (NOTE 1).  Default values of
# I/O clock delay time on Cyrix 5x86 and 6x86 are 0 and 7,respectively
# (no clock delay).
#
# CPU_L2_LATENCY specifies the L2 cache latency value.  This option is used
# only when CPU_PPRO2CELERON is defined and Mendocino Celeron is detected.
# The default value is 5.
#
# CPU_LOOP_EN prevents flushing the prefetch buffer if the destination
# of a jump is already present in the prefetch buffer on Cyrix 5x86(NOTE
# 1).
#
# CPU_PPRO2CELERON enables L2 cache of Mendocino Celeron CPUs.  This option
# is useful when you use Socket 8 to Socket 370 converter, because most Pentium
# Pro BIOSs do not enable L2 cache of Mendocino Celeron CPUs.
#
# CPU_RSTK_EN enables return stack on Cyrix 5x86 (NOTE 1).
#
# CPU_SOEKRIS enables support www.soekris.com hardware.
#
# CPU_SUSP_HLT enables suspend on HALT.  If this option is set, CPU
# enters suspend mode following execution of HALT instruction.
#
# CPU_UPGRADE_HW_CACHE eliminates unneeded cache flush instruction(s).
#
# CPU_WT_ALLOC enables write allocation on Cyrix 6x86/6x86MX and AMD
# K5/K6/K6-2 CPUs.
#
# CYRIX_CACHE_WORKS enables CPU cache on Cyrix 486 CPUs with cache
# flush at hold state.
#
# CYRIX_CACHE_REALLY_WORKS enables (1) CPU cache on Cyrix 486 CPUs
# without cache flush at hold state, and (2) write-back CPU cache on
# Cyrix 6x86 whose revision < 2.7 (NOTE 2).
#
# NO_F00F_HACK disables the hack that prevents Pentiums (and ONLY
# Pentiums) from locking up when a LOCK CMPXCHG8B instruction is
# executed.  This option is only needed if I586_CPU is also defined,
# and should be included for any non-Pentium CPU that defines it.
#
# NO_MEMORY_HOLE is an optimisation for systems with AMD K6 processors
# which indicates that the 15-16MB range is *definitely* not being
# occupied by an ISA memory hole.
#
# NOTE 1: The options, CPU_BTB_EN, CPU_LOOP_EN, CPU_IORT,
# CPU_LOOP_EN and CPU_RSTK_EN should not be used because of CPU bugs.
# These options may crash your system.
#
# NOTE 2: If CYRIX_CACHE_REALLY_WORKS is not set, CPU cache is enabled
# in write-through mode when revision < 2.7.  If revision of Cyrix
# 6x86 >= 2.7, CPU cache is always enabled in write-back mode.
#
# NOTE 3: This option may cause failures for software that requires
# locked cycles in order to operate correctly.
#
options 	CPU_ATHLON_SSE_HACK
options 	CPU_BLUELIGHTNING_3X
options 	CPU_BLUELIGHTNING_FPU_OP_CACHE
options 	CPU_BTB_EN
options 	CPU_DIRECT_MAPPED_CACHE
options 	CPU_DISABLE_5X86_LSSER
options 	CPU_DISABLE_CMPXCHG
#options 	CPU_DISABLE_SSE
options 	CPU_ELAN
options 	CPU_ELAN_PPS
options 	CPU_ELAN_XTAL=32768000
options 	CPU_ENABLE_LONGRUN
options 	CPU_FASTER_5X86_FPU
options 	CPU_GEODE
options 	CPU_I486_ON_386
options 	CPU_IORT
options 	CPU_L2_LATENCY=5
options 	CPU_LOOP_EN
options 	CPU_PPRO2CELERON
options 	CPU_RSTK_EN
options 	CPU_SOEKRIS
options 	CPU_SUSP_HLT
options 	CPU_UPGRADE_HW_CACHE
options 	CPU_WT_ALLOC
options 	CYRIX_CACHE_WORKS
options 	CYRIX_CACHE_REALLY_WORKS
#options 	NO_F00F_HACK

# Debug options
options 	NPX_DEBUG	# enable npx debugging

#
# PERFMON causes the driver for Pentium/Pentium Pro performance counters
# to be compiled.  See perfmon(4) for more information.
#
options 	PERFMON

#
# XBOX causes the kernel to be bootable on the Microsoft XBox console system.
# The resulting kernel will auto-detect whether it is being booted on a XBox,
# so kernels compiled with this option will also work on an ordinary PC.
# This option require I686_CPU.
#
# xboxfb includes support for the XBox frame buffer device. It is fully USB-
# keyboard aware, and will only be used if an xbox is detected. This option
# (obviously) requires XBOX support in your kernel.
#
# NOTE: xboxfb currently conflicts with syscons(4); if you have an XBOX and
# include both in your kernel; you will not get any video output. Ordinary
# PC's do not suffer from this.
#
options		XBOX
device		xboxfb


#####################################################################
# NETWORKING OPTIONS

#
# DEVICE_POLLING adds support for mixed interrupt-polling handling
# of network device drivers, which has significant benefits in terms
# of robustness to overloads and responsivity, as well as permitting
# accurate scheduling of the CPU time between kernel network processing
# and other activities.  The drawback is a moderate (up to 1/HZ seconds)
# potential increase in response times.
# It is strongly recommended to use HZ=1000 or 2000 with DEVICE_POLLING
# to achieve smoother behaviour.
# Additionally, you can enable/disable polling at runtime with help of
# the ifconfig(8) utility, and select the CPU fraction reserved to
# userland with the sysctl variable kern.polling.user_frac
# (default 50, range 0..100).
#
# Not all device drivers support this mode of operation at the time of
# this writing.  See polling(4) for more details.

options 	DEVICE_POLLING

# BPF_JITTER adds support for BPF just-in-time compiler.

options		BPF_JITTER


#####################################################################
# CLOCK OPTIONS

# Provide read/write access to the memory in the clock chip.
device		nvram		# Access to rtc cmos via /dev/nvram


#####################################################################
# MISCELLANEOUS DEVICES AND OPTIONS

device		speaker		#Play IBM BASIC-style noises out your speaker
hint.speaker.0.at="isa"
hint.speaker.0.port="0x61"
device		gzip		#Exec gzipped a.out's.  REQUIRES COMPAT_AOUT!
device		apm_saver	# Requires APM


#####################################################################
# HARDWARE BUS CONFIGURATION

#
# ISA bus
#
device		isa		# Required by npx(4)

#
# Options for `isa':
#
# AUTO_EOI_1 enables the `automatic EOI' feature for the master 8259A
# interrupt controller.  This saves about 0.7-1.25 usec for each interrupt.
# This option breaks suspend/resume on some portables.
#
# AUTO_EOI_2 enables the `automatic EOI' feature for the slave 8259A
# interrupt controller.  This saves about 0.7-1.25 usec for each interrupt.
# Automatic EOI is documented not to work for for the slave with the
# original i8259A, but it works for some clones and some integrated
# versions.
#
# MAXMEM specifies the amount of RAM on the machine; if this is not
# specified, FreeBSD will first read the amount of memory from the CMOS
# RAM, so the amount of memory will initially be limited to 64MB or 16MB
# depending on the BIOS.  If the BIOS reports 64MB, a memory probe will
# then attempt to detect the installed amount of RAM.  If this probe
# fails to detect >64MB RAM you will have to use the MAXMEM option.
# The amount is in kilobytes, so for a machine with 128MB of RAM, it would
# be 131072 (128 * 1024).
#
# BROKEN_KEYBOARD_RESET disables the use of the keyboard controller to
# reset the CPU for reboot.  This is needed on some systems with broken
# keyboard controllers.

options 	AUTO_EOI_1
#options 	AUTO_EOI_2

options 	MAXMEM=(128*1024)
#options 	BROKEN_KEYBOARD_RESET

#
# EISA bus
#
# The EISA bus device is `eisa'.  It provides auto-detection and
# configuration support for all devices on the EISA bus.

device		eisa

# By default, only 10 EISA slots are probed, since the slot numbers
# above clash with the configuration address space of the PCI subsystem,
# and the EISA probe is not very smart about this.  This is sufficient
# for most machines, but in particular the HP NetServer LC series comes
# with an onboard AIC7770 dual-channel SCSI controller on EISA slot #11,
# thus you need to bump this figure to 12 for them.
options 	EISA_SLOTS=12

#
# MCA bus:
#
# The MCA bus device is `mca'.  It provides auto-detection and
# configuration support for all devices on the MCA bus.
# No hints are required for MCA.

device		mca

#
# PCI bus & PCI options:
#
device		pci

#
# AGP GART support
device		agp


#####################################################################
# HARDWARE DEVICE CONFIGURATION

# To include support for VGA VESA video modes
options 	VESA

# Turn on extra debugging checks and output for VESA support.
options 	VESA_DEBUG

device		dpms		# DPMS suspend & resume via VESA BIOS

#
# The Numeric Processing eXtension driver.  This is non-optional.
device		npx
hint.npx.0.flags="0x0"
hint.npx.0.irq="13"

#
# `flags' for npx0:
#	0x01	don't use the npx registers to optimize bcopy.
#	0x02	don't use the npx registers to optimize bzero.
#	0x04	don't use the npx registers to optimize copyin or copyout.
# The npx registers are normally used to optimize copying and zeroing when
# all of the following conditions are satisfied:
#	I586_CPU is an option
#	the cpu is an i586 (perhaps not a Pentium)
#	the probe for npx0 succeeds
#	INT 16 exception handling works.
# Then copying and zeroing using the npx registers is normally 30-100% faster.
# The flags can be used to control cases where it doesn't work or is slower.
# Setting them at boot time using hints works right (the optimizations
# are not used until later in the bootstrap when npx0 is attached).
# Flag 0x08 automatically disables the i586 optimized routines.
#

#
# Optional devices:
#

# PS/2 mouse
device		psm
hint.psm.0.at="atkbdc"
hint.psm.0.irq="12"

# Options for psm:
options 	PSM_HOOKRESUME		#hook the system resume event, useful
					#for some laptops
options 	PSM_RESETAFTERSUSPEND	#reset the device at the resume event

# The keyboard controller; it controls the keyboard and the PS/2 mouse.
device		atkbdc
hint.atkbdc.0.at="isa"
hint.atkbdc.0.port="0x060"

# The AT keyboard
device		atkbd
hint.atkbd.0.at="atkbdc"
hint.atkbd.0.irq="1"

# Options for atkbd:
options 	ATKBD_DFLT_KEYMAP	# specify the built-in keymap
makeoptions	ATKBD_DFLT_KEYMAP=jp.106

# `flags' for atkbd:
#       0x01    Force detection of keyboard, else we always assume a keyboard
#       0x02    Don't reset keyboard, useful for some newer ThinkPads
#	0x03	Force detection and avoid reset, might help with certain
#		dockingstations
#       0x04    Old-style (XT) keyboard support, useful for older ThinkPads

# Video card driver for VGA adapters.
device		vga
hint.vga.0.at="isa"

# Options for vga:
# Try the following option if the mouse pointer is not drawn correctly
# or font does not seem to be loaded properly.  May cause flicker on
# some systems.
options 	VGA_ALT_SEQACCESS

# If you can dispense with some vga driver features, you may want to
# use the following options to save some memory.
#options 	VGA_NO_FONT_LOADING	# don't save/load font
#options 	VGA_NO_MODE_CHANGE	# don't change video modes

# Older video cards may require this option for proper operation.
options 	VGA_SLOW_IOACCESS	# do byte-wide i/o's to TS and GDC regs

# The following option probably won't work with the LCD displays.
options 	VGA_WIDTH90		# support 90 column modes

# Debugging.
options 	VGA_DEBUG

# 3Dfx Voodoo Graphics, Voodoo II /dev/3dfx CDEV support.  This will create
# the /dev/3dfx0 device to work with glide implementations.  This should get
# linked to /dev/3dfx and /dev/voodoo.  Note that this is not the same as
# the tdfx DRI module from XFree86 and is completely unrelated.
#
# To enable Linuxulator support, one must also include COMPAT_LINUX in the
# config as well.  The other option is to load both as modules.

device		tdfx			# Enable 3Dfx Voodoo support
device		tdfx_linux		# Enable Linuxulator support

#
# ACPI support using the Intel ACPI Component Architecture reference
# implementation.
#
# ACPI_DEBUG enables the use of the debug.acpi.level and debug.acpi.layer
# kernel environment variables to select initial debugging levels for the
# Intel ACPICA code.  (Note that the Intel code must also have USE_DEBUGGER
# defined when it is built).
#
# ACPI_NO_SEMAPHORES makes the AcpiOs*Semaphore routines a no-op.
#
# Note that building ACPI into the kernel is deprecated; the module is
# normally loaded automatically by the loader.

device		acpi
options 	ACPI_DEBUG
#!options 	ACPI_NO_SEMAPHORES

# ACPI Asus Desktop Extras. (voltage, temp, fan)
device		acpi_aiboost

# ACPI Asus Extras (LCD backlight/brightness, video output, etc.)
device		acpi_asus

# ACPI Fujitsu Extras (Buttons)
device		acpi_fujitsu

# ACPI extras driver for IBM laptops
device         acpi_ibm

# ACPI Panasonic Extras (LCD backlight/brightness, video output, etc.)
device		acpi_panasonic

# ACPI Sony extra (LCD brightness)
device		acpi_sony

# ACPI Toshiba Extras (LCD backlight/brightness, video output, etc.)
device		acpi_toshiba

# ACPI Video Extensions (LCD backlight/brightness, video output, etc.)
device		acpi_video

# ACPI Docking Station
device		acpi_dock

# The cpufreq(4) driver provides support for non-ACPI CPU frequency control
device		cpufreq

# Direct Rendering modules for 3D acceleration.
device		drm		# DRM core module required by DRM drivers
device		i915drm		# Intel i830 through i915
device		mach64drm	# ATI Rage Pro, Rage Mobility P/M, Rage XL
device		mgadrm		# AGP Matrox G200, G400, G450, G550
device		r128drm		# ATI Rage 128
device		radeondrm	# ATI Radeon
device		savagedrm	# S3 Savage3D, Savage4
device		sisdrm		# SiS 300/305, 540, 630
device		tdfxdrm		# 3dfx Voodoo 3/4/5 and Banshee
options 	DRM_DEBUG	# Include debug printfs (slow)

#
# mse: Logitech and ATI InPort bus mouse ports

device		mse
hint.mse.0.at="isa"
hint.mse.0.port="0x23c"
hint.mse.0.irq="5"

#
# Network interfaces:
#

# ar:   Arnet SYNC/570i hdlc sync 2/4 port V.35/X.21 serial driver
#       (requires sppp)
# ath:  Atheros a/b/g WiFi adapters (requires ath_hal and wlan)
# ce:   Cronyx Tau-PCI/32 sync single/dual port G.703/E1 serial adaptor
#       with 32 HDLC subchannels (requires sppp (default), or NETGRAPH if
#       NETGRAPH_CRONYX is configured)
# cp:   Cronyx Tau-PCI sync single/dual/four port
#       V.35/RS-232/RS-530/RS-449/X.21/G.703/E1/E3/T3/STS-1
#       serial adaptor (requires sppp (default), or NETGRAPH if
#       NETGRAPH_CRONYX is configured)
# cs:   IBM Etherjet and other Crystal Semi CS89x0-based adapters
# ctau: Cronyx Tau sync dual port V.35/RS-232/RS-530/RS-449/X.21/G.703/E1
#       serial adaptor (requires sppp (default), or NETGRAPH if
#       NETGRAPH_CRONYX is configured)
# cx:   Cronyx Sigma multiport sync/async adapter (requires sppp (default),
#       or NETGRAPH if NETGRAPH_CRONYX is configured)
# ed:   Western Digital and SMC 80xx; Novell NE1000 and NE2000; 3Com 3C503
#       HP PC Lan+, various PC Card devices
#       (requires miibus)
# ie:   AT&T StarLAN 10 and EN100; 3Com 3C507; unknown NI5210;
#       Intel EtherExpress
# ipw:	Intel PRO/Wireless 2100 IEEE 802.11 adapter
# iwi:	Intel PRO/Wireless 2200BG/2225BG/2915ABG IEEE 802.11 adapters
# iwn:	Intel Wireless WiFi Link 4965AGN 802.11 network adapters
# nfe:	nVidia nForce MCP on-board Ethernet Networking (BSD open source)
# nve:	nVidia nForce MCP on-board Ethernet Networking
# ral:	Ralink Technology IEEE 802.11 wireless adapter
# sbni: Granch SBNI12-xx ISA and PCI adapters
# sr:   RISCom/N2 hdlc sync 1/2 port V.35/X.21 serial driver (requires sppp)
# ural:	Ralink Technology RT2500USB IEEE 802.11 wireless adapter
# wl:   Lucent Wavelan (ISA card only).
# wpi:	Intel 3945ABG Wireless LAN controller

# Order for ISA/EISA devices is important here

device		ar
hint.ar.0.at="isa"
hint.ar.0.port="0x300"
hint.ar.0.irq="10"
hint.ar.0.maddr="0xd0000"
device		ce
device		cp
device		cs
hint.cs.0.at="isa"
hint.cs.0.port="0x300"
device		ctau
hint.ctau.0.at="isa"
hint.ctau.0.port="0x240"
hint.ctau.0.irq="15"
hint.ctau.0.drq="7"
#options 	NETGRAPH_CRONYX		# Enable NETGRAPH support for Cronyx adapter(s)
device		ed
options 	ED_3C503
options 	ED_HPP
options 	ED_SIC
hint.ed.0.at="isa"
hint.ed.0.port="0x280"
hint.ed.0.irq="5"
hint.ed.0.maddr="0xd8000"
device		ie			# Hints only required for Starlan
hint.ie.2.at="isa"
hint.ie.2.port="0x300"
hint.ie.2.irq="5"
hint.ie.2.maddr="0xd0000"
device		iwi
device		iwn
device		ipw
# Hint for the i386-only ISA front-end of le(4).
hint.le.0.at="isa"
hint.le.0.port="0x280"
hint.le.0.irq="10"
hint.le.0.drq="0"
device		nfe		# nVidia nForce MCP on-board Ethernet Networking
device		nve		# nVidia nForce MCP on-board Ethernet Networking
device		ral
device		sbni
hint.sbni.0.at="isa"
hint.sbni.0.port="0x210"
hint.sbni.0.irq="0xefdead"
hint.sbni.0.flags="0"
device		sr
hint.sr.0.at="isa"
hint.sr.0.port="0x300"
hint.sr.0.irq="5"
hint.sr.0.maddr="0xd0000"
device		ural
device		wl
hint.wl.0.at="isa"
hint.wl.0.port="0x300"
options 	WLCACHE		# enables the signal-strength cache
options 	WLDEBUG		# enables verbose debugging output
device		wpi

device		ath
device		ath_hal		# Atheros HAL (includes binary component)
#device		ath_rate_amrr	# AMRR rate control for ath driver
#device		ath_rate_onoe	# Onoe rate control for ath driver
device		ath_rate_sample	# SampleRate rate control for the ath driver
#device		wlan		# 802.11 layer

#
# ATA raid adapters
#
device		pst

#
# Areca 11xx and 12xx series of SATA II RAID controllers.
# CAM is required.
#
device		arcmsr		# Areca SATA II RAID

#
# 3ware 9000 series PATA/SATA RAID controller driver and options.
# The driver is implemented as a SIM, and so, needs the CAM infrastructure.
#
options 	TWA_DEBUG		# 0-10; 10 prints the most messages.
options 	TWA_FLASH_FIRMWARE	# firmware image bundled when defined.
device		twa			# 3ware 9000 series PATA/SATA RAID

#
# SCSI host adapters:
#
# ncv: NCR 53C500 based SCSI host adapters.
# nsp: Workbit Ninja SCSI-3 based PC Card SCSI host adapters.
# stg: TMC 18C30, 18C50 based SCSI host adapters.

device		ncv
device		nsp
device		stg
hint.stg.0.at="isa"
hint.stg.0.port="0x140"
hint.stg.0.port="11"

#
# Adaptec FSA RAID controllers, including integrated DELL controllers,
# the Dell PERC 2/QC and the HP NetRAID-4M
device		aac
device		aacp	# SCSI Passthrough interface (optional, CAM required)

# The 'asr' driver provides support for current DPT/Adaptec SCSI RAID
# controllers (SmartRAID V and VI and later).
# These controllers require the CAM infrastructure.
#
device		asr

#
# Highpoint RocketRAID 182x.
device		hptmv

#
# Highpoint RocketRAID.  Supports RR172x, RR222x, RR2240, RR232x, RR2340,
# RR2210, RR174x, RR2522, RR231x, RR230x.
device		hptrr

#
# Highpoint RocketRaid 3xxx series SATA RAID
device		hptiop

#
# IBM (now Adaptec) ServeRAID controllers
device		ips

#
# SafeNet crypto driver: can be moved to the MI NOTES as soon as
# it's tested on a big-endian machine
#
device		safe		# SafeNet 1141
options 	SAFE_DEBUG	# enable debugging support: hw.safe.debug
options 	SAFE_RNDTEST	# enable rndtest support

#
# glxsb is a driver for the Security Block in AMD Geode LX processors.
# Requires 'device crypto'.
#
device		glxsb		# AMD Geode LX Security Block

#####################################################################

#
# Miscellaneous hardware:
#
# apm: Laptop Advanced Power Management (experimental)
# ipmi: Intelligent Platform Management Interface
# pmtimer: Timer device driver for power management events (APM or ACPI)
# smapi: System Management Application Program Interface driver
# smbios: DMI/SMBIOS entry point
# vpd: Vital Product Data kernel interface
# spic: Sony Programmable I/O controller (VAIO notebooks)
# asmc: Apple System Management Controller

# Notes on APM
#  The flags takes the following meaning for apm0:
#    0x0020  Statclock is broken.

# Notes on the Specialix SI/XIO driver:
#  The host card is memory, not IO mapped.
#  The Rev 1 host cards use a 64K chunk, on a 32K boundary.
#  The Rev 2 host cards use a 32K chunk, on a 32K boundary.
#  The cards can use an IRQ of 11, 12 or 15.

# Notes on the Sony Programmable I/O controller
#  This is a temporary driver that should someday be replaced by something
#  that hooks into the ACPI layer.  The device is hooked to the PIIX4's
#  General Device 10 decoder, which means you have to fiddle with PCI
#  registers to map it in, even though it is otherwise treated here as
#  an ISA device.  At the moment, the driver polls, although the device
#  is capable of generating interrupts.  It largely undocumented.
#  The port location in the hint is where you WANT the device to be
#  mapped.  0x10a0 seems to be traditional.  At the moment the jogdial
#  is the only thing truly supported, but apparently a fair percentage
#  of the Vaio extra features are controlled by this device.

device		apm
hint.apm.0.flags="0x20"
device		ipmi
device		smapi
device		smbios
device		vpd
device		pmtimer			# Adjust system timer at wakeup time
# Parallel (8255 PPI) basic I/O (mode 0) port (e.g. Advantech PCL-724)
device		pbio
hint.pbio.0.at="isa"
hint.pbio.0.port="0x360"
device		spic
hint.spic.0.at="isa"
hint.spic.0.port="0x10a0"
device		asmc
#
# Laptop/Notebook options:
#
# See also:
#  apm under `Miscellaneous hardware'
# above.

# For older notebooks that signal a powerfail condition (external
# power supply dropped, or battery state low) by issuing an NMI:

options 	POWERFAIL_NMI	# make it beep instead of panicing

#
# I2C Bus
#
# Philips i2c bus support is provided by the `iicbus' device.
#
# Supported interfaces:
# pcf	Philips PCF8584 ISA-bus controller
#
device		pcf
hint.pcf.0.at="isa"
hint.pcf.0.port="0x320"
hint.pcf.0.irq="5"

#
# Hardware watchdog timers:
#
# ichwd: Intel ICH watchdog timer
#
device		ichwd

#
# Temperature sensors:
#
# coretemp: on-die sensor on Intel Core and newer CPUs
#
device		coretemp

#
# CPU control pseudo-device. Provides access to MSRs, CPUID info and
# microcode update feature.
#
device		cpuctl

#
# System Management Bus (SMB)
#
options 	ENABLE_ALART		# Control alarm on Intel intpm driver

#
# Set the number of PV entries per process.  Increasing this can
# stop panics related to heavy use of shared memory.  However, that can
# (combined with large amounts of physical memory) cause panics at
# boot time due the kernel running out of VM space.
#
# If you're tweaking this, you might also want to increase the sysctls
# "vm.v_free_min", "vm.v_free_reserved", and "vm.v_free_target".
#
# The value below is the one more than the default.
#
options 	PMAP_SHPGPERPROC=201

#
# Change the size of the kernel virtual address space.  Due to
# constraints in loader(8) on i386, this must be a multiple of 4.
# 256 = 1 GB of kernel address space.  Increasing this also causes
# a reduction of the address space in user processes.  512 splits
# the 4GB cpu address space in half (2GB user, 2GB kernel).  For PAE
# kernels, the value will need to be double non-PAE.  A value of 1024
# for PAE kernels is necessary to split the address space in half.
# This will likely need to be increased to handle memory sizes >4GB.
# PAE kernels default to a value of 512.
#
options 	KVA_PAGES=260


#####################################################################
# ABI Emulation

# Enable iBCS2 runtime support for SCO and ISC binaries
options 	IBCS2

# Emulate spx device for client side of SVR3 local X interface
options 	SPX_HACK

# Enable Linux ABI emulation
options 	COMPAT_LINUX

# Enable i386 a.out binary support
options 	COMPAT_AOUT

# Enable the linux-like proc filesystem support (requires COMPAT_LINUX
# and PSEUDOFS)
options 	LINPROCFS

#Enable the linux-like sys filesystem support (requires COMPAT_LINUX
# and PSEUDOFS)
options		LINSYSFS

#
# SysVR4 ABI emulation
#
# The svr4 ABI emulator can be statically compiled into the kernel or loaded as
# a KLD module.
# The STREAMS network emulation code can also be compiled statically or as a
# module.  If loaded as a module, it must be loaded before the svr4 module
# (the /usr/sbin/svr4 script does this for you).  If compiling statically,
# the `streams' device must be configured into any kernel which also
# specifies COMPAT_SVR4.  It is possible to have a statically-configured
# STREAMS device and a dynamically loadable svr4 emulator;  the /usr/sbin/svr4
# script understands that it doesn't need to load the `streams' module under
# those circumstances.
# Caveat:  At this time, `options KTRACE' is required for the svr4 emulator
# (whether static or dynamic).
#
options 	COMPAT_SVR4	# build emulator statically
options 	DEBUG_SVR4	# enable verbose debugging
device		streams		# STREAMS network driver (required for svr4).

# Enable NDIS binary driver support
options 	NDISAPI
device		ndis


#####################################################################
# VM OPTIONS

# Disable the 4 MByte page PSE CPU feature.  The PSE feature allows the
# kernel to use 4 MByte pages to map the kernel instead of 4k pages.
# This saves on the amount of memory needed for page tables needed to
# map the kernel.  You should only disable this feature as a temporary
# workaround if you are having problems with it enabled.
#
#options 	DISABLE_PSE

# Disable the global pages PGE CPU feature.  The PGE feature allows pages
# to be marked with the PG_G bit.  TLB entries for these pages are not
# flushed from the cache when %cr3 is reloaded.  This can make context
# switches less expensive.  You should only disable this feature as a
# temporary workaround if you are having problems with it enabled.
#
#options 	DISABLE_PG_G

# KSTACK_PAGES is the number of memory pages to assign to the kernel
# stack of each thread.

options 	KSTACK_PAGES=3

#####################################################################

# More undocumented options for linting.
# Note that documenting these are not considered an affront.

options 	FB_INSTALL_CDEV		# install a CDEV entry in /dev

options 	I586_PMC_GUPROF=0x70000
options 	KBDIO_DEBUG=2
options 	KBD_MAXRETRY=4
options 	KBD_MAXWAIT=6
options 	KBD_RESETDELAY=201

options 	PSM_DEBUG=1

options 	TIMER_FREQ=((14318182+6)/12)

options 	VM_KMEM_SIZE
options 	VM_KMEM_SIZE_MAX
options 	VM_KMEM_SIZE_SCALE


# asr old ioctls support, needed by raidutils

options		ASR_COMPAT