Re: PPC CPU speed detection [was: Re: amigappc test kernel for CSPPC and BPPC]

[Frank Wille <frank%phoenix.owl.de@localhost>]

On Mon, 13 Dec 2010 11:41:35 +0100
Rados?aw Kujawa <radoslaw.kujawa%c0ff33.net@localhost> wrote:

> > Something's certainly wrong there, I've got a 0 MHz CPU ;).
> 
> The 604e User's Manual states that "604e?s PLL_CFG settings are
> compatible with the 603e and the 604, although the supported frequency
> ranges may differ". Values found in 603e User's Manual (rev. 5/98,
> table C-4) and 604e User's Manual (rev. 3/98, table 7-6) are
> different in some cases: 
> 
> PLL_CFG 603e        604e
> 0000 0  1x          1x
> 0001 1  1x          1x
> 0010 2  1x          7x
> 0011 3  PLL Bypass  PLL Bypass
> 0100 4  2x          2x
> 0101 5  2x          6.5x
> 0110 6  no info     2.5x
> 0111 7  no info     4.5x
> 1000 8  3x          3x
> 1001 9  3x          5.5x
> 1010 10 no info     4x
> 1011 11 no info     5x
> 1100 12 4x          1.5x
> 1101 13 no info     6x
> 1110 14 no info     3.5x
> 1111 15 off         off

I just checked the latest 603eUM from 2002 (Q2/02 REV 3). Some changes to
your table:

0110 6  2.5x
1001 9  no info
1010 10 4x
1100 12 1.5x
1110 14 3.5x

Those new values all match with the 604e PLLs, but some, like 0010 and 0101,
are still wrong. So you are probably right that we could use the 604e PLL
table for the 603e as well.


> I have a BlizzardPPC upgraded with 603e 300MHz (60MHz bus) and PLL_CFG
> returns 1011, which is absent in 603e datasheet...

Still absent. But it would match the 604e PLL.


-- 
Frank Wille