[src/trunk]: src/sys/arch/evbppc/mpc85xx Make sure r8 isn't used.

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

details:   https://anonhg.NetBSD.org/src/rev/738668fc516b
branches:  trunk
changeset: 780568:738668fc516b
user:      matt <matt%NetBSD.org@localhost>
date:      Sun Jul 29 21:36:27 2012 +0000

description:
Make sure r8 isn't used.
Document args passed by uboot

diffstat:

 sys/arch/evbppc/mpc85xx/mpc85xx_start.S |  22 +++++++++++-----------
 1 files changed, 11 insertions(+), 11 deletions(-)

diffs (50 lines):

diff -r 766bd9c7fbe3 -r 738668fc516b sys/arch/evbppc/mpc85xx/mpc85xx_start.S
--- a/sys/arch/evbppc/mpc85xx/mpc85xx_start.S   Sun Jul 29 21:10:50 2012 +0000
+++ b/sys/arch/evbppc/mpc85xx/mpc85xx_start.S   Sun Jul 29 21:36:27 2012 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: mpc85xx_start.S,v 1.5 2011/06/18 06:37:38 matt Exp $   */
+/*     $NetBSD: mpc85xx_start.S,v 1.6 2012/07/29 21:36:27 matt Exp $   */
 /*-
  * Copyright (c) 2010, 2011 The NetBSD Foundation, Inc.
  * All rights reserved.
@@ -37,7 +37,7 @@
 #include <sys/cdefs.h>
 #include <powerpc/asm.h>
 
-RCSID("$NetBSD: mpc85xx_start.S,v 1.5 2011/06/18 06:37:38 matt Exp $")
+RCSID("$NetBSD: mpc85xx_start.S,v 1.6 2012/07/29 21:36:27 matt Exp $")
 
 #include "opt_altivec.h"
 #include "opt_ddb.h"
@@ -78,10 +78,10 @@
 /*
  * Startup entry.  Note, this must be the first thing in the text segment!
  */
-       mr      %r8,%r6
-       mr      %r7,%r5
-       mr      %r6,%r4
-       mr      %r5,%r3
+       mr      %r8,%r6         /* cmdline (char *) */
+       mr      %r7,%r5         /* consdev (char *) */
+       mr      %r6,%r4         /* os_hdr * */
+       mr      %r5,%r3         /* board info * */
 #ifdef DEBUG
        /*
         * Set all the registers we don't care about to a known junk value.
@@ -231,11 +231,11 @@
        /*
         * Force all dirty lines in the kernel area to memory.
         */
-       lis     %r8,kernel_text@ha
-       addi    %r8,%r8,kernel_text@l
-4:     dcbst   %r0,%r8
-       addi    %r8,%r8,32
-       cmplw   %r8,%r4
+       lis     %r9,kernel_text@ha
+       addi    %r9,%r9,kernel_text@l
+4:     dcbst   %r0,%r9
+       addi    %r9,%r9,32
+       cmplw   %r9,%r4
        blt     %cr0,4b
        mbar    1
        msync