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In computing, busdma, bus_dma and bus_space is a set of application programming interfaces designed to help make device drivers less dependent on platform-specific code, thereby allowing the host operating system to be more easily ported to new computer hardware. This is accomplished by having abstractions for direct memory access (DMA) mapping across popular machine-independent computer buses like PCI, which are used on distinct architectures from IA-32 (NetBSD/i386) to DEC Alpha (NetBSD/alpha). Additionally, some devices may come in multiple flavours supporting more than one bus, e.g., ISA, EISA, VESA Local Bus and PCI, still sharing the same core logic irrespective of the bus, and such device drivers would also benefit from this same abstraction. Thus the rationale of busdma is to facil

Attributes	Values
rdfs:label	Busdma (en)
rdfs:comment	In computing, busdma, bus_dma and bus_space is a set of application programming interfaces designed to help make device drivers less dependent on platform-specific code, thereby allowing the host operating system to be more easily ported to new computer hardware. This is accomplished by having abstractions for direct memory access (DMA) mapping across popular machine-independent computer buses like PCI, which are used on distinct architectures from IA-32 (NetBSD/i386) to DEC Alpha (NetBSD/alpha). Additionally, some devices may come in multiple flavours supporting more than one bus, e.g., ISA, EISA, VESA Local Bus and PCI, still sharing the same core logic irrespective of the bus, and such device drivers would also benefit from this same abstraction. Thus the rationale of busdma is to facil (en)
dcterms:subject	Operating system APIs DragonFly BSD FreeBSD NetBSD OpenBSD Application programming interfaces BSD software Operating system technology
Wikipage page ID	590670 (xsd:integer)
Wikipage revision ID	1073678792 (xsd:integer)
Link from a Wikipage to another Wikipage	Operating system APIs Peripheral Component Interconnect VESA Local Bus Device driver DragonFly BSD FreeBSD NetBSD OpenBSD FreeBSD Application programming interface Linux Computing DEC Alpha DragonFly BSD Extended Industry Standard Architecture Direct memory access Fork (software development) Application programming interfaces BSD software Operating system technology Code reuse Industry Standard Architecture NetBSD OpenBSD Operating system Man page IA-32 Platform (computing) Portability (software) Computer bus
Link from a Wikipage to an external page	http://www.freebsd.org/projects/busdma/ https://web.archive.org/web/20100729125804/http:/www.freebsd.org/projects/busdma/ https://wiki.freebsd.org/UnifiedBusDma
sameAs	Busdma Busdma Busdma Busdma Busdma
dbp:wikiPageUsesTemplate	dbt:Lowercase_title dbt:R dbt:Reflist dbt:Short_description dbt:Webarchive dbt:OpenBSD dbt:DragonFly dbt:FreeBSD dbt:NetBSD dbt:Unix-stub
date	2010-07-29 (xsd:date)
url	https://web.archive.org/web/20100729125804/http:/www.freebsd.org/projects/busdma/
has abstract	In computing, busdma, bus_dma and bus_space is a set of application programming interfaces designed to help make device drivers less dependent on platform-specific code, thereby allowing the host operating system to be more easily ported to new computer hardware. This is accomplished by having abstractions for direct memory access (DMA) mapping across popular machine-independent computer buses like PCI, which are used on distinct architectures from IA-32 (NetBSD/i386) to DEC Alpha (NetBSD/alpha). Additionally, some devices may come in multiple flavours supporting more than one bus, e.g., ISA, EISA, VESA Local Bus and PCI, still sharing the same core logic irrespective of the bus, and such device drivers would also benefit from this same abstraction. Thus the rationale of busdma is to facilitate maximum code reuse across a wide range of platforms. Circa 2006, bus and DMA abstractions made it possible for NetBSD to support 50 hardware platforms and 14 CPU architectures out of a single source tree, compared to the forking model used by Linux ports. Originally implemented as the "bus_dma" APIs by the developers of the NetBSD operating system, busdma has been adopted by OpenBSD, FreeBSD and their derivatives; with FreeBSD incorporating it under a busdma umbrella (without an underscore). Both NetBSD and OpenBSD have additional "bus_space" APIs that have been amalgamated into the version of busdma incorporated into FreeBSD. DragonFly BSD developers are also slowly converting their drivers to use busdma. (en)
gold:hypernym	Set
prov:wasDerivedFrom	wikipedia-en:Busdma?oldid=1073678792&ns=0
page length (characters) of wiki page	5493 (xsd:nonNegativeInteger)
foaf:isPrimaryTopicOf	wikipedia-en:Busdma
is rdfs:seeAlso of	NetBSD
is Link from a Wikipage to another Wikipage of	Bus dma Bus space
is Wikipage redirect of	Bus dma Bus space
is foaf:primaryTopic of	wikipedia-en:Busdma

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