[ECOS] structure XScale HAL ?

Bob Koninckx bob.koninckx@mech.kuleuven.ac.be
Thu Nov 14 08:18:00 GMT 2002


Looks very similar to the powerpc HAL. Maybe you can get some
inspiration there ?

Bob

On Thu, 2002-11-14 at 17:09, david@mind.be wrote:
> Hello,
> 
> I was wondering if anybody else has been using the xscale HAL for a port other
> than the IQ-80321 ?
> Or has this been a one-off implementation for the IQ-80321 ?
> As I am currently doing a port to a pxa-250 based board, I have been dissecting
> the xscale tree a bit, and I think that the current structure of the xscale
> tree needs some rearranging, so I would appreciate some feedback on the following:
> 
> Currently, CYGPKG_HAL_ARM_XSCALE_IQ80321 has CYGPKG_HAL_ARM_XSCALE_CORE as its
> parent. But the IQ-80321 is a board based on the IOP321 cpu, which in turn has
> an XScale core.
> Similarly, the port I am doing is for a board based on the PXA250 cpu, which also has an XScale core.
> So, to have a clean port, I think it would be best to have a 3-level
> structure instead of the current 2-level structure:
> - XSCALE_CORE (with core specific stuff)
> - XSCALE_PXA250 (with cpu specific stuff)
> - XSCALE_my_board (with board specific stuff)
> 
> With the current 2-level structure of the IQ-80321 port, the cpu-support
> for the IOP321 gets mixed with the board-support for the IQ-80321, which also
> means that the IOP321 specific stuff cannot be easily used for other ports
> with that same cpu.
> I think it would also be nice to have separate directories in the tree for
> this (e.g. xscale/core , xscale/cpu, xscale/board).
> 
> But before starting with that structure for my port, I would like to know what
> anybody else is doing. 
> (If it's a daft idea, I will also stick to the 2-level structure ;-)
> 
> Best Regards,
> David
> 
> -- 
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-- 
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ir. Bob Koninckx
Katholieke Universiteit Leuven       
Division Production Engineering,                   tel.  +32 16 322535
Machine Design and Automation                      fax.  +32 16 322987
Celestijnenlaan 300B                  bob.koninckx@mech.kuleuven.ac.be
B-3001 Leuven Belgium               http://www.mech.kuleuven.ac.be/pma
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