Operating System Embedded: Difference between revisions

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{{Infobox OS

| name = Enea OSE

| logo = [[Image:ENEA AB logo.png]]

| screenshot =

| caption =

| developer = [[ENEA AB|ENEA]]

| family = [[realReal-time operating system|Real-time]] [[embedded operating system]]

| released working state = Current

| languagereleased = <!-- {{Start date and age|19??|mm|dd}} -->

| source model = Closed-source

| kernel type = [[Microkernel]]

| supported_platformssupported platforms = [[ARM architecture|ARM]], [[PowerPC]], [[MIPS architecture|MIPS]]

| latest release version = 5.9.1

| latest_release_datelatest release date = {{releaseStart date and age|2018|03|20}}

| latest preview version =

| latest preview date =

| marketing target = [[Multi-core processor|Multi-core]] [[embedded system]]s

| programmed_inprogrammed in = [[assemblyAssembly language|Assembly]], [[C (programming language)|C]], [[C++]]

| kernel_typelanguage = English

| prog_languageupdate model =

| package_managerpackage manager =

| ui =

| license = [[Proprietary software|Proprietary]]

| updatemodelpreceded by =

| working_statesucceeded by =

| website = {{URL|www.enea.com/ose}}

| source_model other articles =

| kernel_type =

| supported_platforms = [[ARM architecture|ARM]], [[PowerPC]], [[MIPS architecture|MIPS]]

| latest_release_version = 5.9.1

| latest_release_date = {{release date and age|2018|03|20}}

| latest_test_version =

| latest_test_date =

| marketing_target =

| programmed_in = [[assembly language|Assembly]], [[C (programming language)|C]], [[C++]]

| prog_language =

| updatemodel =

| package_manager =

| working_state =

}}

The '''Operating System Embedded''' (known 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 [[kernelKernel (computeroperating sciencesystem)|kernel]]. The early version for the [[Zilog Z80]] processor was named OS80.

== 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 [[queueQueue (abstract data structuretype)|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

* Multilevel process scheduling

* [[Event-driven architecture|Event-driven]], deterministic [[Real-time computing|real-time]] response

* Asynchronous direct [[message-passing]] model

* Scalable hybrid [[Multi-core processor|multicore]] solutionsystem exploiting the advantages from both [[Symmetricasymmetric multiprocessing|SMP]] (AMP) and [[Asymmetricsymmetric multiprocessing|AMP]] (SMP) models

* [[memoryMemory 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 [[RAMrandom-access memory]] usage(RAM) use

* Comprehensive networking/ and security support

* Multiple file system choices including crash-safe, [[journaling file system]]

* Distributed system-level simulation

* Run Modemode Monitormonitor (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. andIt 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/SMPAMP–SMP kernel in OSE Multicore Edition is based on a number of:

* Essential services in OSE are implemented according to a micro kernelmicrokernel model which allows IP stacks, [[file systemssystem]]s, 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 characteristicstraits.

* 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.

The Enea OSE family of RTOS features 3 OSs: ''OSE'' for [[ARM architecture|ARM processors]], [[PowerPC]] and [[MIPS architecture|MIPS]], ''OSE_ck'' for various DSP's, and ''OSE Epsilon'' for minimal devices, written in pure assembly ([[ARM architecture|ARM processors]], [[ColdFire]]) .

== Processor support ==

OSE supports many processors, mainly 32-bit processors:

OSE supports many mainly 32-bit processors:

* ARM family:

** [[ARM9E]]

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==See also==

* [[Smartphone]]

* [[ISA platform]] (Nokia OS)

==References==

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{{Real-time operating systems}}

{{Microkernel}}

{{MicroKernel}}

[[Category:Real-time operating systems]]