[ECOS] MPC860 Porting (ROM/Flash)

Gary Thomas gary@mlbassoc.com
Thu Dec 11 13:57:00 GMT 2003


Note: there may be something wrong with your email tool - I received
this message 4 times!

On Thu, 2003-12-11 at 06:06, Viswanath Bandi wrote:
> Sorry for not mentioning this in my earlier mail. We have P&E Micro flash
> programmer with us. Can I use it to program the flash? If yes, do I still
> need to mention the flash details in the CDL? Basically I am just trying
> to build it with one serial port so that I can see the RedBoot prompt.
> 

You can indeed use the tool to program the FLASH, but by putting the
details into RedBoot, you'll be able to use the FLASH directly.  That
way, you can update RedBoot, save configuration information and other
data in FLASH, etc.

In other words, why have a nice big FLASH device (4MB) if you're not
going to use it :-)

> Gary Thomas wrote:
> 
> >On Thu, 2003-12-11 at 04:37, Viswanath Bandi wrote:
> >  
> >
> >>Hello All,
> >>
> >>I have been trying to port eCos to a custom board based on MPC860. I 
> >>copied the
> >>target mbx in powerpc directory and made the necessary changes. In mbx, 
> >>there is
> >>an option called CYGHWR_HAL_POWERPC_MBX_BOOT_32BIT_FLASH to boot from 
> >>32bit flash.
> >>Our board uses Intel 28F320J5 chip arranged as 2M x 16bit memory. Any 
> >>idea how
> >>I need to reflect in the CDL file?
> >>    
> >>
> >
> >Look at how other target platforms have used this device.  You'll end up
> >with a new package in the devs/flash/powerpc directory which has CDL and
> >support files that describe your situation.
> >
> >  
> >
> >>Also can somebody tell what is the difference between booting from ROM and
> >>booting from FLASH.
> >>    
> >>
> >
> >Nothing (as long as it's NOR FLASH) - just terminology.
> >
> >  
> >
-- 
Gary Thomas <gary@mlbassoc.com>
MLB Associates


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