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#REDIRECT [[ENEA AB#OSE]]{{Broken anchor|date=2025-06-13|bot=User:Cewbot/log/20201008/configuration|target_link=ENEA AB#OSE|reason= The anchor (OSE) [[Special:Diff/1295439991|has been deleted]].|diff_id=1295439991}} {{R from Merge}} {{R to Section}}
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{{Infobox OS
| name = Enea OSE
| logo = [[Image:ENEA AB logo.png]]
| screenshot =
| caption =
| developer = [[ENEA AB|ENEA]]
| source_model =
| kernel_type =
| supported_platforms = [[ARM architecture|ARM]], [[PowerPC]], [[MIPS architecture|MIPS]]
| ui =
| family = [[real-time operating system|Real-time]] [[embedded operating system]]
| released =
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| latest_test_version =
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| programmed_in = [[assembly language|Assembly]], [[C (programming language)|C]], [[C++]]
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| updatemodel =
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| license =
| website = {{URL|www.enea.com/ose}}
}}
The '''Operating System Embedded''' (known mostly by the [[acronym]] '''Enea OSE''') is a [[real-time operating system|real-time]] [[embedded operating system]] created by the [[Sweden|Swedish]] information technology company [[ENEA AB]]. [[Bengt Eliasson]], who at the time was a consultant from ENEA with an assignment at [[Ericsson]], wrote the basic parts of the [[kernel (computer science)|kernel]]. The early version for the [[Zilog Z80]] processor was named OS80.
Enea OSE is one of the most widely used [[RTOS]]es in the world. According to mobile analyst firm, VisionMobile, OSE has been deployed in over 1.75 billion mobile handsets, as of the end of June 2010.<ref>{{cite web |url=http://www.100millionclub.com |title=100 Million Club: Winners and losers in the OS Arena |author=Kapetanakis, Matos |date=3 April 2011 |publisher=VisionMobile Ltd}}</ref> Enea OSE is shipped in hundreds of millions of mobile phones each year and over half of the world's 3G base stations.<ref>[http://www.enea.com/33494.epibrw Leader in Communications Software]</ref>
== Architecture and abilities ==
OSE uses [[event (computing)|events]] (named ''[[signal programming|signals]]'' due to ENEA's telecom background) in the form of messages passed to and from [[computer process|processes]] in the system. Messages are stored in a [[queue (data structure)|queue]] attached to each process. A 'link handler' mechanism allows signals to be passed between processes on separate machines, over a variety of transports. The OSE signalling mechanism formed the basis of an [[open-source software|open-source]] inter-process kernel design project called [[LINX (IPC)|LINX]].
* [[Fault tolerant]], [[distributed architecture]]
* Modular, layered [[microkernel]] architecture
* [[Event-driven architecture|Event-driven]], deterministic real-time response
* Asynchronous direct [[message-passing]] model
* Scalable hybrid [[Multi-core processor|multicore]] solution exploiting the advantages from both [[Symmetric multiprocessing|SMP]] and [[Asymmetric multiprocessing|AMP]] models
* [[memory protection|Memory protected]]
* Centralized [[error handling]] and remediation
* Built-in task (process) monitoring and failure detection
* Dynamic, run-time program loading
* [[Power management]] with low-power sleep mode
* [[Demand paging]] support for optimizing [[RAM]] usage
* Comprehensive networking/security support
* Multiple file system choices including crash-safe, [[journaling file system]]
* Distributed system-level simulation
* Run Mode Monitor (RMM) for [[remote monitoring]], tracing, profiling, and debugging
* Optima, an [[Eclipse (software)|Eclipse]]-based integrated development environment and tools suite
== Multicore Edition ==
Enea OSE Multicore Edition was released in 2009 and is based on the same microkernel architecture. The kernel design that combines the advantages of both traditional asymmetric multiprocessing (AMP) and symmetric multiprocessing (SMP).
The hybrid AMP/SMP kernel in OSE Multicore Edition is based on a number of:
* Essential services in OSE are implemented according to a micro kernel model which allows IP stacks, file systems, application loaders, etc. to be located on different cores, while applications can access these services regardless of ___location in the system (___location transparency).
* A kernel that instantiates a separate scheduler on each core with associated data structures to preserve determinism and realtime characteristics.
* User-defined process migration and load balancing based on low intrusion mechanisms to measure CPU load on each core.
* A lightweight kernel internal IPC mechanism called kernel events used to perform asynchronous, cross core transactions in order to avoid the use of fine-granular locking designs, which has a detrimental effect on performance.
VDC Research Group selected Enea OSE Multicore Edition Best of Show at ESC Boston 2009.<ref>[http://www.embedded.com/esc/220101008 Embeddie Winners Announced]</ref>
The Enea OSE family of RTOS features 3 OSs: ''OSE'' for [[ARM architecture|ARM processors]], [[PowerPC]] and [[MIPS architecture|MIPS]], ''OSE<sub>ck</sub>'' for various DSP's, and ''OSE Epsilon'' for minimal devices, written in pure assembly.
== Processor support ==
OSE supports many mainly 32-bit processors:
* ARM family:
** [[ARM9E]]
** [[ARM11]]
** [[Xscale]]
** [[ARM Cortex]]
* [[PowerPC]] family:
** IBM PPC4xx
** IBM [[PowerPC 7xx|PPC7xx]]
** [[Freescale]] MPC86xx (multicore support on MPC8641D)
** Freescale MPC85xx (multicore support on MPC8572DS, QorIQ P2020, P4080)
** Freescale MPC83xx
** Freescale MPC82xx
** Freescale MPC74xx
* [[MIPS architecture|MIPS]] family
** [[Cavium Networks|Cavium]] Octeon Plus (CN58xx and CN56xx)
** MIPS32
==See also==
* [[Smartphone]]
* [[ISA platform]] (Nokia OS)
==External links==
* {{Official website|www.enea.com}}
* [http://www.enea.com/ose Product page]
==References==
{{Reflist}}
{{Real-time operating systems}}
[[Category:Real-time operating systems]]
[[Category:Embedded operating systems]]
[[sv:Operating System Embedded]]
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