freeRTOS / OpenRISC

FreeRTOS is designed to be small and simple. The kernel itself consists of only three or four C files. To make the code readable, easy to port, and maintainable, it is written mostly in C, but there are a few assembly functions included where needed (mostly in architecture-specific scheduler routines).

Supported architectures

ARM architecture

 ARM7

 ARM9

 ARM Cortex-M0

 ARM Cortex-M0+

 ARM Cortex-M3

 ARM Cortex-M4

 ARM Cortex-A

Atmel

 Atmel AVR

 AVR32

 SAM3

 SAM4

 SAM7

 SAM9

 SAM D20

 SAM L21

Intel

 x86

 8052

[링크 : https://en.wikipedia.org/wiki/FreeRTOS]

[링크 : http://www.freertos.org/]

[링크 : http://sourceforge.net/projects/freertos/]

Linux support

The mainline Linux kernel gained support for OpenRISC in version 3.1.[17] The implementation merged in this release is the 32-bit OpenRISC 1000 family (or1k).[18] Previously OpenRISC 1000 architecture, but this has now been superseded by the mainline port.

RTOS support

A number of real-time operating systems have been ported to OpenRISC, including RTEMS, FreeRTOS and eCos.

QEMU support

Since version 1.2 [19] QEMU supports emulating OpenRISC platforms.

[링크 : https://en.wikipedia.org/wiki/OpenRISC]

[링크 : http://openrisc.io/]