[src/nathanw_sa]: src/sys/arch/mipsco/mipsco Implement MI softintr functions ...

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

details:   https://anonhg.NetBSD.org/src/rev/07b824a19255
branches:  nathanw_sa
changeset: 504599:07b824a19255
user:      wdk <wdk%NetBSD.org@localhost>
date:      Fri Mar 30 23:21:31 2001 +0000

description:
Implement MI softintr functions (softintr_establish, softintr_schedule etc)

diffstat:

 sys/arch/mipsco/mipsco/interrupt.c |  182 +++++++++++++++++++++++++++++++++++++
 1 files changed, 182 insertions(+), 0 deletions(-)

diffs (186 lines):

diff -r d5f8cb58b065 -r 07b824a19255 sys/arch/mipsco/mipsco/interrupt.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/mipsco/mipsco/interrupt.c        Fri Mar 30 23:21:31 2001 +0000
@@ -0,0 +1,182 @@
+/*     $NetBSD: interrupt.c,v 1.1.12.2 2001/03/30 23:21:31 wdk Exp $   */
+
+/*
+ * Copyright (c) 2001 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Wayne Knowles
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *        This product includes software developed by the NetBSD
+ *        Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/param.h>
+#include <sys/malloc.h>
+
+#include <uvm/uvm_extern.h>
+
+#include <net/netisr.h>                        /* Legacy softnet support */
+
+#include <machine/intr.h>
+#include <machine/sysconf.h>
+
+struct mipsco_intr softintr_tab[IPL_NSOFT];
+
+/* XXX For legacy software interrupts. */
+struct mipsco_intrhand *softnet_intrhand;
+
+u_int32_t ssir;
+
+/*
+ * softintr_init:
+ *
+ *     Initialize the software interrupt system.
+ */
+void
+softintr_init()
+{
+       static const char *softintr_names[] = IPL_SOFTNAMES;
+       struct mipsco_intr *sip;
+       int i;
+
+       for (i = 0; i < IPL_NSOFT; i++) {
+               sip = &softintr_tab[i];
+               sip->intr_ipl = i;
+               LIST_INIT(&sip->intr_q);
+               evcnt_attach_dynamic(&sip->ih_evcnt, EVCNT_TYPE_INTR,
+                   NULL, "soft", softintr_names[i]);
+       }
+
+       /* XXX Establish legacy software interrupt handlers. */
+       softnet_intrhand = softintr_establish(IPL_SOFTNET,
+           (void (*)(void *))netintr, NULL);
+
+       KASSERT(softnet_intrhand != NULL);
+}
+
+/*
+ * softintr_dispatch:
+ *
+ *     Process pending software interrupts.
+ *
+ *      Called at splsoft()
+ */
+void
+softintr_dispatch()
+{
+       struct mipsco_intr *sip;
+       struct mipsco_intrhand *sih;
+       u_int32_t n, i, s;
+
+       s = splhigh();
+       n = ssir; ssir = 0;
+       splx(s);
+       sip = softintr_tab;
+       for (i = 0; i < IPL_NSOFT; sip++, i++) {
+           if ((n & (1 << i)) == 0)
+               continue;
+           sip->ih_evcnt.ev_count++;
+
+           LIST_FOREACH(sih, &sip->intr_q, ih_q) {
+               if (sih->ih_pending) {
+                   uvmexp.softs++;
+                   sih->ih_pending = 0;
+                   (*sih->ih_fun)(sih->ih_arg);
+               }
+           }
+       }
+}
+
+/*
+ * softintr_establish:         [interface]
+ *
+ *     Register a software interrupt handler.
+ */
+void *
+softintr_establish(int ipl, void (*func)(void *), void *arg)
+{
+       struct mipsco_intr *sip;
+       struct mipsco_intrhand *sih;
+       int s;
+
+       if (__predict_false(ipl >= IPL_NSOFT || ipl < 0))
+               panic("softintr_establish");
+
+       sip = &softintr_tab[ipl];
+
+       sih = malloc(sizeof(*sih), M_DEVBUF, M_NOWAIT);
+       if (__predict_true(sih != NULL)) {
+               sih->ih_fun = (void *)func;
+               sih->ih_arg = arg;
+               sih->ih_intrhead = sip;
+               sih->ih_pending = 0;
+
+               s = splsoft();
+               LIST_INSERT_HEAD(&sip->intr_q, sih, ih_q);
+               splx(s);
+       }
+       return (sih);
+}
+
+/*
+ * softintr_disestablish:      [interface]
+ *
+ *     Unregister a software interrupt handler.
+ */
+void
+softintr_disestablish(void *arg)
+{
+       struct mipsco_intrhand *ih = arg;
+       int s;
+
+       s = splsoft();
+       LIST_REMOVE(ih, ih_q);
+       splx(s);
+       free(ih, M_DEVBUF);
+}
+
+void
+cpu_intr(status, cause, pc, ipending)
+       u_int32_t status;
+       u_int32_t cause;
+       u_int32_t pc;
+       u_int32_t ipending;
+{
+       uvmexp.intrs++;
+
+       /* device interrupts */
+       (*platform.iointr)(status, cause, pc, ipending);
+
+       /* software simulated interrupt */
+       if ((ipending & MIPS_SOFT_INT_MASK_1)
+                   || (ssir && (status & MIPS_SOFT_INT_MASK_1))) {
+           _clrsoftintr(MIPS_SOFT_INT_MASK_1);
+           softintr_dispatch();
+       }
+}