RTEMS for ARM Cortex-M1 ?

Sebastian Huber sebastian.huber at embedded-brains.de
Sat Feb 14 06:49:02 UTC 2015

On 14/02/15 02:58, Cudmore, Alan P. (GSFC-5820) wrote:
> A project is looking at using RTEMS on an FPGA based ARM Cortex-M1 like
> the one in the Microsemi ProAsic3L development kit:
> http://www.microsemi.com/products/fpga-soc/design-resources/dev-kits/proasi
> c3/cortex-m1-enabled-proasic3l-development-kit
> Wikipedia says the Cortex-M1 is an ARMv6M architecture.
> http://en.wikipedia.org/wiki/ARM_Cortex-M#Cortex-M1
> I see that there is ARMv7M support in score, would a similar port be
> needed for ARMv6M?
> Is an ARMv6M close to anything in RTEMS now?

The ARMv6M has a reduced instruction set compared to ARMv7M. We have an 
ARMv6M multilib, so the GCC part should be fine. You have to fix some 
ARMv7M assembly code in RTEMS (not much). I tried to do this two weeks a 
go, but after 10 minutes I gave up, since it had no priority for me.

Sebastian Huber, embedded brains GmbH

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