[PATCH] Add support for FP emulation for the e300c2 core

Kumar Gala galak at kernel.crashing.org
Mon Dec 4 15:41:56 EST 2006


On Dec 3, 2006, at 9:23 PM, Paul Mackerras wrote:

> Kim Phillips writes:
>
>> The e300c2 has no FPU.  Its MSR[FP] is grounded to zero.  If an  
>> attempt
>> is made to execute a floating point instruction (including  
>> floating-point
>> load, store, or move instructions), the e300c2 takes a floating-point
>> unavailable interrupt (IVOR7).
>
> Can't you just point IVOR7 at the program check handler on these cpus?

No, e300c2 is a 'classic' core not book-e.  It's effectively a 603 w/ 
o and FPU.  I'll cleanup the commit message in my git tree for you.

- k



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