John Dallaway <j...@dallaway.org.uk> writes: > >> The cortexm hal seems like a closer match to me. Although, after > >> looking at the code, it appears to be very minimal at the moment.
The Cortex-M devices are very different to the A8 and all other ARMs. Apart from the instruction set, almost all of the architecture is different. The A8 implements essentially the same architecture as previous ARMs. > > eCos runs anything without thumb code and it runs fine here. But if you > > like to > > do a cortex-a HAL, I would love to support you. Especially for cortex-a9 > > multicores it will be important. > > Please note that eCos on Cortex-A was discussed some time ago on this > list in the context of a proposed port to OMAP3530. Ref: > > http://ecos.sourceware.org/ml/ecos-discuss/2009-05/msg00089.html Indeed, and the advice given there should remain. The A8 can be viewed as an ARM9 with some bells and whistles. Most of those bells and whistles are largely irrelevant to eCos -- they are mainly intended to make the ARM architecture more suitable for server class applications. Any A8 port should be based on the ARM architecture HAL, plus an A8 variant HAL and a platform HAL. The A8 variant HAL can be modelled on the ARM9 variant HAL, and should initially be created by copying it. -- Nick Garnett eCos Kernel Architect eCosCentric Limited http://www.eCosCentric.com The eCos experts Barnwell House, Barnwell Drive, Cambridge, UK. Tel: +44 1223 245571 Registered in England and Wales: Reg No: 4422071 -- Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
