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freebsd-skq/sys/ia64/conf/GENERIC
ed cc3116a938 Integrate the new MPSAFE TTY layer to the FreeBSD operating system. 
The last half year I've been working on a replacement TTY layer for the
FreeBSD kernel. The new TTY layer was designed to improve the following:

- Improved driver model:

  The old TTY layer has a driver model that is not abstract enough to
  make it friendly to use. A good example is the output path, where the
  device drivers directly access the output buffers. This means that an
  in-kernel PPP implementation must always convert network buffers into
  TTY buffers.

  If a PPP implementation would be built on top of the new TTY layer
  (still needs a hooks layer, though), it would allow the PPP
  implementation to directly hand the data to the TTY driver.

- Improved hotplugging:

  With the old TTY layer, it isn't entirely safe to destroy TTY's from
  the system. This implementation has a two-step destructing design,
  where the driver first abandons the TTY. After all threads have left
  the TTY, the TTY layer calls a routine in the driver, which can be
  used to free resources (unit numbers, etc).

  The pts(4) driver also implements this feature, which means
  posix_openpt() will now return PTY's that are created on the fly.

- Improved performance:

  One of the major improvements is the per-TTY mutex, which is expected
  to improve scalability when compared to the old Giant locking.
  Another change is the unbuffered copying to userspace, which is both
  used on TTY device nodes and PTY masters.

Upgrading should be quite straightforward. Unlike previous versions,
existing kernel configuration files do not need to be changed, except
when they reference device drivers that are listed in UPDATING.

Obtained from:		//depot/projects/mpsafetty/...
Approved by:		philip (ex-mentor)
Discussed:		on the lists, at BSDCan, at the DevSummit
Sponsored by:		Snow B.V., the Netherlands
dcons(4) fixed by:	kan
2008-08-20 08:31:58 +00:00

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#
# GENERIC -- Generic kernel configuration file for FreeBSD/ia64
#
# For more information on this file, please read the handbook section on
# Kernel Configuration Files:
#
# http://www.FreeBSD.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig-config.html
#
# The handbook is also available locally in /usr/share/doc/handbook
# if you've installed the doc distribution, otherwise always see the
# FreeBSD World Wide Web server (http://www.FreeBSD.org/) for the
# latest information.
#
# An exhaustive list of options and more detailed explanations of the
# device lines is also present in the ../../conf/NOTES and NOTES files.
# If you are in doubt as to the purpose or necessity of a line, check
# first in NOTES.
#
# For hardware specific information check HARDWARE.TXT
#
# $FreeBSD$
cpu ITANIUM
ident GENERIC
makeoptions DEBUG=-g # Build kernel with debug information.
options AUDIT # Security event auditing
options CD9660 # ISO 9660 Filesystem
options COMPAT_43TTY # BSD 4.3 TTY compat [KEEP THIS!]
options COMPAT_FREEBSD6 # Compatible with FreeBSD6
options COMPAT_FREEBSD7 # Compatible with FreeBSD7
options DDB # Support DDB
options FFS # Berkeley Fast Filesystem
options GDB # Support remote GDB
options GEOM_LABEL # Provides labelization
options INET # InterNETworking
options INET6 # IPv6 communications protocols
options INVARIANTS # Enable calls of extra sanity checking
options INVARIANT_SUPPORT # required by INVARIANTS
options KDB # Enable kernel debugger support
options KTRACE # ktrace(1) syscall trace support
options MD_ROOT # MD usable as root device
options MSDOSFS # MSDOS Filesystem
options NFSCLIENT # Network Filesystem Client
options NFSSERVER # Network Filesystem Server
options NFSLOCKD # Network Lock Manager
options NFS_ROOT # NFS usable as root device
options PROCFS # Process filesystem (/proc)
options PSEUDOFS # Pseudo-filesystem framework
options SCHED_ULE # ULE scheduler
options SCSI_DELAY=5000 # Delay (in ms) before probing SCSI
options SCTP # Stream Control Transmission Protocol
options SMP # Symmetric Multi-Processor support
options SOFTUPDATES # Enable FFS soft updates support
options STACK # stack(9) support
options SYSVMSG # SYSV-style message queues
options SYSVSEM # SYSV-style semaphores
options SYSVSHM # SYSV-style shared memory
options UFS_ACL # Support for access control lists
options UFS_DIRHASH # Hash-based directory lookup scheme
options UFS_GJOURNAL # Enable gjournal-based UFS journaling
options WITNESS # Enable checks to detect deadlocks and cycles
options WITNESS_SKIPSPIN # Don't run witness on spinlocks for speed
options _KPOSIX_PRIORITY_SCHEDULING # Posix P1003_1B RT extensions
options HWPMC_HOOKS # Necessary kernel hooks for hwpmc(4)
# Various "busses"
device firewire # FireWire bus code
device miibus # MII bus support (Ethernet)
device pci # PCI bus support
device scbus # SCSI bus (required for SCSI)
device usb # USB Bus (required for USB)
# ATA and ATAPI devices
device ata # ATA controller
device atadisk # ATA disk drives
device atapicd # ATAPI CDROM drives
device atapifd # ATAPI floppy drives
device ataraid # ATA RAID drives
# SCSI Controllers
device ahc # AHA2940 and AIC7xxx devices
device ahd # AHA39320/29320 and AIC79xx devices
device isp # Qlogic family
device mpt # LSI-Logic MPT-Fusion
device sym # NCR/Symbios Logic
# RAID controllers interfaced to the SCSI subsystem
device ciss # Compaq Smart RAID 5*
device dpt # DPT Smartcache III, IV
device iir # Intel Integrated RAID
device mly # Mylex AcceleRAID/eXtremeRAID
# SCSI peripherals
device cd # CD-ROM, DVD-ROM etc.
device ch # Media changer
device da # Direct Access (ie disk)
device pass # Passthrough (direct SCSI access)
device sa # Sequential Access (ie tape)
device ses # Environmental Services (and SAF-TE)
# RAID controllers
device aac # Adaptec FSA RAID
device aacp # SCSI passthrough for aac (requires CAM)
device amr # AMI MegaRAID
device ida # Compaq Smart RAID
device mlx # Mylex DAC960 family
# USB host controllers and peripherals
device ehci # EHCI host controller
device ohci # OHCI PCI->USB interface
device ugen # Generic device
device uhci # UHCI PCI->USB interface
device uhid # Human Interface Devices
device ukbd # Keyboard
device ulpt # Printer
device umass # Disks/Mass storage (need scbus & da)
device ums # Mouse
# PCI Ethernet NICs.
device de # DEC/Intel DC21x4x (``Tulip'')
device em # Intel PRO/1000 adapter Gigabit Ethernet Card
device le # AMD Am7900 LANCE and Am79C9xx PCnet
device txp # 3Com 3cR990 (``Typhoon'')
device vx # 3Com 3c590, 3c595 (``Vortex'')
# PCI Ethernet NICs that use the common MII bus controller code.
device bge # Broadcom BCM570xx Gigabit Ethernet
device dc # DEC/Intel 21143 and various workalikes
device fxp # Intel EtherExpress PRO/100B (82557, 82558)
device pcn # AMD Am79C97x PCI 10/100 (precedence over 'le')
device re # RealTek 8139C+/8169/8169S/8110S
device rl # RealTek 8129/8139
device sf # Adaptec AIC-6915 (``Starfire'')
device sis # Silicon Integrated Systems SiS 900/SiS 7016
device xl # 3Com 3c90x ("Boomerang", "Cyclone")
# USB Ethernet
device aue # ADMtek USB Ethernet
device cdce # Generic USB over Ethernet
device cue # CATC USB Ethernet
device kue # Kawasaki LSI USB Ethernet
# FireWire support
device sbp # SCSI over FireWire (need scbus & da)
# Various (pseudo) devices
device ether # Ethernet support
device faith # IPv6-to-IPv4 relaying (translation)
device gif # IPv6 and IPv4 tunneling
device loop # Network loopback
device md # Memory "disks"
device pty # BSD-style compatibility pseudo ttys
device puc # Multi I/O cards and multi-channel UARTs
device random # Entropy device
device tun # Packet tunnel.
device uart # Serial port (UART)
device firmware # firmware assist module
# The `bpf' device enables the Berkeley Packet Filter.
# Be aware of the administrative consequences of enabling this!
# Note that 'bpf' is required for DHCP.
device bpf # Berkeley packet filter
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