RTEMS on MCP750 and MTX-60x, for Eric Valette

gregory.menke at gsfc.nasa.gov gregory.menke at gsfc.nasa.gov
Sun Nov 10 15:37:57 UTC 2002

Valette Eric writes:
 > gregory.menke at gsfc.nasa.gov wrote:
 > > I don't think Joel would be enthusiastic about switching bootloaders
 > > just now... ;)
 > Sure. I did not mean that. I just wanted to say :
 > 	1) Do not spend too much time on Gabriel Paubert's bootloader, it is 
 > not rtems in fact and this bootloader is now dead (in 99, it had a 
 > change to become the next prep linux boot loader),
 > 	2) This boot loader enables the MMU and then disable it again but what 
 > may stay it TLB, cache, ... Especially on old processor with some errata 
 > related to mmu enabling/disabling, cache flush and so on,
 > 	3) try to simply use linux boot loader and see if it works, the trick 
 > being to correctly locate the code and data for rtems  and find the 
 > entry point... And then try ppcboot.

I think I'll give your idea a try- some of the stuff in the bootloader
related to identifying the various segments is very strange and I
don't like some aspects of how its implemented.  Since there are newer
ppc devices, it will probably be useful to keep the bootloader
somewhat current- it might make future bsp's a little easier.

 > Anyway, It is nice to see someone running your code on unexpected 
 > processor and boards and learn it works without too much pain :-)

I was very pleased when I got it to come up.  Its possible that MTX
boards are popular.  They also come in SMP versions- ours is not
unfortunately, but wouldn't it be fun to make RTEMS SMP compliant?

I quite like the ppc.  I'm coming from the Mongoose R3000 bsp, which
is a much more primitive processor.  Theres nothing much bad about it,
but the ppc is MUCH fancier.  I wonder how a R4000 compares to the



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