[ECOS] PPC Redboot....more progress, but still more problems..

[ECOS] PPC Redboot....more progress, but still more problems..

[Michael Dorin]

Once again, thanks to everybody for their help.

I have revisited my SDRAM init routine, found a 
couple bugs...and now with burst enabled the chip
select, cpu does not crash when the MMU is turned on.

However when I hit a break point or hit control-c,
I get:
  
0x49f48 <hal_delay_us+72>:      I!I!I!fnmadd.  
f31,f31,f31,f31
83                  asm volatile("mfdec  %0;" :
"=r"(new_dec) : );


Any idea what the I!I!Ifnmadd. F31..etc?
Has anybody else run into this?

I am compiling with the 860 flag and the flag
for soft floating point. 

I can break on hal_delay and it gets hit again
and again.
I can step through hal_delay.

I can diassemble hal_delay before the MMU is turned
on and it is fine. 

As always, thanks a lot, 
I really appreciate the help.
-Mike

       

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