PATCH: final version of l2cr cmd line

PATCH: final version of l2cr cmd line

[Michel Lanners]

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Hi Paul,

Since BenH fixed the _set_L2CR() function, I have been able to shorten
the l2cr command line code. Attached is the patch vs. your current 2.4
rsync tree. I've not been able for a long time to boot a 2.4 kernel, but
it never crashed in this part ;-)

Anyway, all the patch does is to actually enable the processing of l2cr=
command lines.

Thanks for including this if you have no objection.

Cheers

Michel

PS Patch also posted to sourceforge.

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Michel Lanners                 |  " Read Philosophy.  Study Art.
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email   mlan@cpu.lu            |
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diff -uNr linux-2.4.paul/arch/ppc/kernel/setup.c linux/arch/ppc/kernel/setup.c
--- linux-2.4.paul/arch/ppc/kernel/setup.c	Tue Aug  8 07:46:33 2000
+++ linux/arch/ppc/kernel/setup.c	Sat Sep  2 11:26:13 2000
@@ -661,11 +661,13 @@
 	{
 		unsigned long val = simple_strtoul(str, NULL, 0);
 		printk(KERN_INFO "l2cr set to %lx\n", val);
-		_set_L2CR(0);
-		_set_L2CR(val);
+		_set_L2CR(0); 		/* force invalidate by disable cache */
+		_set_L2CR(val);		/* and enable it */
 	}
 }

+__setup("l2cr=", ppc_setup_l2cr);
+
 void __init ppc_init(void)
 {
 	/* clear the progress line */

Re: PATCH: final version of l2cr cmd line

[Benjamin Herrenschmidt]

>
>Since BenH fixed the _set_L2CR() function, I have been able to shorten
>the l2cr command line code. Attached is the patch vs. your current 2.4
>rsync tree. I've not been able for a long time to boot a 2.4 kernel, but
>it never crashed in this part ;-)

PS: Thanks again to PowerLogix (and their PPC guru, Terry Greeniaus) who
provided the _set_L2CR() code, which, as you can see, can be quite tricky.


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