Incomplete (potentially broken) Raven Chipset support for PREP machines.

[VALETTE Eric]

>>>>> "Gabriel" == Gabriel Paubert <paubert at iram.es> writes:

Gabriel> On Fri, 4 Dec 1998, Cort Dougan wrote:

Gabriel> Actually the names raven and prep in the config method routines are
Gabriel> misleading, all Motorola bridges I know support this method (106, 106 and
Gabriel> Raven), and it should be used since it is more flexible than the direct
Gabriel> mapped method also supported by the 105 and 106 but not by the Raven.

Sorry to have this question but what are the "10[56]" ?

Gabriel> Using the residual data for this is the Right Way (TM), although we should
Gabriel> do something for non residual data present. 

I'm affraid,  parsing residual data if far from beeing sufficient : as far as I 
understand, the residual data are set up by the boot loader. How will that help
to :
   1) reprogram and IDE controller to native PCI mode rather than "legacy PC"
   mode,
   2) change the set up interrupt priorities ? (the raven can do that),
   3) handle multi-function devices?
   4) Change the IRQ for PCI devices... (writting the PCI configuration
   register is not sufficeint. You must also enable the interrupt in the
   raven registers),


Gabriel> I have code which correctly extracts the interrupt routing from the
Gabriel> residual data, I hope to make it public next week, it has been working
Gabriel> for two weeks on my MVME2600 and simply needs some cleanup:

Gabriel> [root at vcorr1 ppc]# cat /proc/interrupts
Gabriel>            CPU0       
Gabriel>   1:          8     82c59     keyboard
Gabriel>   2:          0     82c59     cascade
Gabriel>   4:        191     82c59     serial
Gabriel>  16:          0   OpenPIC     82c59 cascade
Gabriel>  18:      17047   OpenPIC     DC21140 (eth0)
Gabriel>  19:       7429   OpenPIC     ncr53c8xx
Gabriel>  21:       7542   OpenPIC     vme (universe)
Gabriel> BAD:          1               spurious or short

I would love to test it on my MCP750 system to see how the IDE controller irq
is routed... This would probably enable me to install my own Linux installation...

--  eric

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