Editing Rockbox (section)

== Architecture ==
Rockbox uses a simple kernel,<ref>{{cite web|url=https://www.rockbox.org/twiki/bin/view/Main/RockboxKernel |title=About the Rockbox kernel |publisher=Rockbox.org |access-date=March 12, 2011}}</ref> with a [[flat memory model]] and single [[process (computing)|process]], letting it run on platforms without a [[memory management unit]]. Thin [[thread (computer science)|threads]] run [[computer multitasking|cooperatively]], returning control to a [[scheduling (computing)|scheduler]] that prioritizes the audio thread; the only form of [[preemption (computing)|preemption]] is through [[interrupt]]s. The operating system and plug-ins are written in [[C (programming language)|C]], with [[assembly language|assembly]] used for code that is device- and platform-specific, and performance sensitive. The simple and lightweight architecture allows Rockbox to run on a variety of targets, with memory ranging from 1 to 64 MB, and CPU speeds ranging 12 to 532&nbsp;MHz. Rockbox also provides support for multicore and [[asymmetric multiprocessing|asymmetric multiprocessor]] systems based on [[ARM architecture|ARM]], [[Freescale ColdFire|ColdFire]], [[MIPS architecture|MIPS]] and [[SuperH|SH]]. Several codecs can be parallelized across 2 CPU cores for increased power efficiency, and the HWCODEC interface allows for dedicated audio decoder DSPs.