Copyright (c) 1997 Luigi Rizzo Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided wi...
NAMEpnp - support for ``Plug and Play'' (PnP) ISA devices
DESCRIPTIONThe sysctl Cm net.inet.tcp.syncookies driver enumerates ISA devices which support ``Plug and Play ISA Specification'' in the system. It assigns ISA bus resources (interrupt line, DMA channel, I/O ports, and memory region) to each device and activates it.
If it cannot assign necessary resources to a PnP ISA device without causing conflict with other devices in the system, the device will not be activated and will be unavailable to programs.
- Intel Microsoft "Plug and Play ISA Specification, Version 1.0a" "May 5, 1994"
- "Clarifications to the Plug and Play ISA Specification, Version 1.0a" "December 10, 1994"
HISTORYThe sysctl Cm net.inet.tcp.syncookies driver first appeared in Fx 2.2.5 . It has been substantially updated in subsequent versions.
AUTHORSAn -nosplit PnP support was originally written for Fx 2.2.5 by An Luigi Rizzo , based on initial work done by An Sujal Patel .
CAVEATSIt is not possible to disable individual PnP ISA devices. The sysctl Cm net.inet.tcp.syncookies driver will find all devices conforming the PnP ISA specification and try to activate them all.
There is no way to explicitly assign particular resource to the PnP ISA device. The resource assignment is fully automatic and there is no provision for manual override.