[src/trunk]: src/sys/arch/arm/arm Improve comment on the clockswitching asm c...

[chris <chris%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/39c00279cef8
branches:  trunk
changeset: 519001:39c00279cef8
user:      chris <chris%NetBSD.org@localhost>
date:      Sat Dec 08 21:30:04 2001 +0000

description:
Improve comment on the clockswitching asm code, it doesn't use r0 at all, it just needs it to make valid asm.

diffstat:

 sys/arch/arm/arm/cpufunc.c |  7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)

diffs (21 lines):

diff -r 4ef9948bdbbe -r 39c00279cef8 sys/arch/arm/arm/cpufunc.c
--- a/sys/arch/arm/arm/cpufunc.c        Sat Dec 08 21:18:50 2001 +0000
+++ b/sys/arch/arm/arm/cpufunc.c        Sat Dec 08 21:30:04 2001 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: cpufunc.c,v 1.22 2001/12/01 23:06:45 thorpej Exp $     */
+/*     $NetBSD: cpufunc.c,v 1.23 2001/12/08 21:30:04 chris Exp $       */
 
 /*
  * arm7tdmi support code Copyright (c) 2001 John Fremlin
@@ -1650,7 +1650,10 @@
 /*     cpu_control(cpuctrlmask, cpuctrl);*/
        cpu_control(0xffffffff, cpuctrl);
 
-       /* enable clockswitching */
+       /* 
+        * enable clockswitching, note that this doesn't read or write to r0,
+        * r0 is just to make it valid asm
+        */
        __asm ("mcr 15, 0, r0, c15, c1, 2");
 }
 #endif /* CPU_SA110 */