[src/trunk]: src/sys/arch/hp700/hp700 Don't use ldcw, since netisr might not ...

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

details:   https://anonhg.NetBSD.org/src/rev/39ea5e491135
branches:  trunk
changeset: 534886:39ea5e491135
user:      fredette <fredette%NetBSD.org@localhost>
date:      Mon Aug 05 20:23:56 2002 +0000

description:
Don't use ldcw, since netisr might not be 16-byte aligned.
Instead, disable interrupts and do a load and a store.

diffstat:

 sys/arch/hp700/hp700/softintr.c |  18 +++++++++---------
 1 files changed, 9 insertions(+), 9 deletions(-)

diffs (39 lines):

diff -r f6ef60273f7e -r 39ea5e491135 sys/arch/hp700/hp700/softintr.c
--- a/sys/arch/hp700/hp700/softintr.c   Mon Aug 05 15:36:51 2002 +0000
+++ b/sys/arch/hp700/hp700/softintr.c   Mon Aug 05 20:23:56 2002 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: softintr.c,v 1.1 2002/06/06 19:48:06 fredette Exp $    */
+/*     $NetBSD: softintr.c,v 1.2 2002/08/05 20:23:56 fredette Exp $    */
 
 /*-
  * Copyright (c) 2000, 2001, 2002 The NetBSD Foundation, Inc.
@@ -41,7 +41,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: softintr.c,v 1.1 2002/06/06 19:48:06 fredette Exp $");
+__KERNEL_RCSID(0, "$NetBSD: softintr.c,v 1.2 2002/08/05 20:23:56 fredette Exp $");
 
 #include <sys/param.h>
 #include <sys/malloc.h>
@@ -137,13 +137,13 @@
 
        /* Special handling for softnet. */
        if (which == HP700_SOFTINTR_SOFTNET) {
-               /* use atomic "load & clear" */
-               /*
-                * XXX netisr must be 16-byte aligned, but
-                * we can't control its declaration.
-                */
-                __asm __volatile ("ldcws 0(%1), %0"
-                                   : "=r" (ni) : "r" (&netisr));
+               __asm __volatile(
+               "       mfctl   %%eiem, %%r22   \n"
+               "       mtctl   %%r0, %%eiem    \n"
+               "       ldw     0(%1), %0       \n"
+               "       stw     %%r0, 0(%1)     \n"
+               "       mtctl   %%r22, %%eiem   \n"
+               : "=&r" (ni) : "r" (&netisr) : "r22");
 #define DONETISR(m,c) if (ni & (1 << (m))) c()
 #include <net/netisr_dispatch.h>
        }