How to boot directly into linux on an OldWorld Mac

[Mike Kimmick]

Thanks for the help!  With l2cr=0xb9080000 kernel arg, I got my cache enabled.  

However, my /proc/cpuinfo isn't the same as when I set the cache using BootX
(/proc/sys/kernel/l2cr is the same with both methods of setting the cache, as
expected).  When setting the G3 cache using BootX, /proc/cpuinfo shows

cpu		: 740/750
temperature 	: 21-24 C (uncalibrated)
clock		: 195MHz
revision	: 130.1 (pvr 0008 8201)
bogomips	: 673.38
machine		: Power Macintosh
motherboard	: AAPL,7500 MacRISC
detected as	: 16 (PowerMac 7500)
pmac flags	: 00000000
L2 cache	: 256K unified   <-----I still have orig. cache card installed
memory		: 176MB
l2cr override	: 0xb9080000     <------Here's the extra entry
pmac-generation	: OldWorld


Here's /proc/cpuinfo when cache is disabled or enabled by method other than BootX

cpu		: 740/750
temperature 	: 21-23 C (uncalibrated)
clock		: 195MHz
revision	: 130.1 (pvr 0008 8201)
bogomips	: 673.38
machine		: Power Macintosh
motherboard	: AAPL,7500 MacRISC
detected as	: 16 (PowerMac 7500)
pmac flags	: 00000000
L2 cache	: 256K unified
memory		: 176MB
pmac-generation	: OldWorld

Here's /proc/sys/kernel/l2cr when cache is enabled just in case it might be
important.

0xb9080000:  enabled, no parity, 1MB, +2 clock, pipelined burst SRAM,
write-through, 0.5ns hold


So, my question.  Is the entry in /proc/cpuinfo for 'l2cr override' important?
 Does it indicate something else has been set other than just the cache?  Is
there another kernel arg to enable this 'override' option?

TIA,

Mike Kimmick

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---------- Original Message -----------
From: "Dan A. Milisic" <dmilisic@canada.com>
To: <yellowdog-general@lists.terrasoftsolutions.com>
Sent: Mon, 2 Jun 2003 01:02:32 -0400
Subject: RE: How to boot directly into linux on an OldWorld Mac

> You need to grab the L2CR setting from your OS9 Cache enabler, then 
> pass an additional kernel argument:
> 
> l2cr=0xa9000000
>        ^---- Not this exact value, your specific cache setting!
> 
> BootX does this automagically when you check the "Enable G3 Cache" 
> box.  I needed to do something similar in Darwin to set the G3 Cache 
> on my 8600.
> 
> D.
> 
> _______________________________________________
> yellowdog-general mailing list
> yellowdog-general@lists.terrasoftsolutions.com
> http://lists.terrasoftsolutions.com/mailman/listinfo/yellowdog-general
------- End of Original Message -------