From: "David N. Welton" <davidw@linuxcare.com>
To: Linux -Dev <linuxppc-dev@lists.linuxppc.org>
Subject: Re: again 2.3.28
Date: Wed, 17 Nov 1999 20:03:00 -0800 [thread overview]
Message-ID: <19991117200300.B4647@bassano.linuxcare.com> (raw)
In-Reply-To: <19991117110116.B4281@bassano.linuxcare.com>; from David N. Welton on Wed, Nov 17, 1999 at 11:01:16AM -0800
Ok... hmmm, this may mean something, but I'll leave it to others to
tell me if I've found something or if I'm just on crack.
copy_and_flush:
addi r5,r5,-4
addi r6,r6,-4
4: li r0,8
mtctr r0
3: addi r6,r6,4 /* copy a cache line */
lwzx r0,r6,r4
stwx r0,r6,r3
bdnz 3b
dcbst r6,r3 /* write it to memory */
sync
icbi r6,r3 /* flush the icache line */
cmplw 0,r6,r5
bl davidw_debug <<<<<<<<< POSITION 1
blt 4b
bl davidw_debug <<<<<<<<< POSITION 2
isync
addi r5,r5,4
addi r6,r6,4
blr
When davidw_debug is in position 1, it actually exits the boot load
back into the firmware with a 'default catch' or something like that.
If it is in position 2, it just hangs and does nothing (possibly
continuing with this loop forever?).
Is this significant? Or am I just messing up something else?
Ciao,
--
David N. Welton, Developer, Linuxcare, Inc.
415.354.4878 x241 tel, 415.701.7457 fax
davidw@linuxcare.com, http://www.linuxcare.com/
Linuxcare. At the center of Linux.
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~1999-11-18 4:03 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-11-17 18:53 again 2.3.28 Andreas Tobler
1999-11-17 19:01 ` David N. Welton
1999-11-17 19:43 ` Ani Joshi
1999-11-17 19:53 ` David N. Welton
1999-11-17 20:06 ` Ani Joshi
1999-11-17 20:09 ` Mac specific code David N. Welton
1999-11-18 4:03 ` David N. Welton [this message]
1999-11-18 4:26 ` again 2.3.28 David Edelsohn
1999-11-18 6:45 ` David N. Welton
1999-11-17 19:39 ` Ani Joshi
1999-11-17 19:49 ` Geert Uytterhoeven
1999-11-17 20:15 ` Ani Joshi
1999-11-17 20:18 ` Geert Uytterhoeven
-- strict thread matches above, loose matches on Subject: below --
1999-11-18 10:01 Benjamin Herrenschmidt
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