Operating systems in general

source SUZAKU SoC Design.pdf

• User application is only program run on uP
• Direct access to all system resources
• Uses C library provided by Xilinx
• Compiled by Xilinx's modified GCC (mb_gcc)
• Fast, simple, only Xilinx toolchain reguired
• Limited function: no server, no IPC, etc.
• User must handle all communications

• OS (e.g. uClinux) loaded first into uP
• User application run as a normal program under the OS
• OS and user application all compiled using cross development tools
• Complicated and may have OS everheads
• Feature rich: all you can get from an OS
• User applications access hardware resource throught APIs included in the OS

• Lynx OS RTOS http://www.lynuxworks.com/rtos/
• L4 - microkernel http://os.inf.tu-dresden.de/L4/
• uKOS microkernel project http://www.ukos.ch/ukos/Intro.html

• Gentoo http://www.gentoo.org/doc/cs/handbook/