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[src/trunk]: src/sys/arch/powerpc Generic soft interrupt support for PowerPC ...
details: https://anonhg.NetBSD.org/src/rev/e3f7cec9249e
branches: trunk
changeset: 559863:e3f7cec9249e
user: matt <matt%NetBSD.org@localhost>
date: Wed Mar 24 23:39:39 2004 +0000
description:
Generic soft interrupt support for PowerPC ports.
diffstat:
sys/arch/powerpc/include/softintr.h | 70 ++++++++++++
sys/arch/powerpc/powerpc/softintr.c | 197 ++++++++++++++++++++++++++++++++++++
2 files changed, 267 insertions(+), 0 deletions(-)
diffs (275 lines):
diff -r b68e948a1648 -r e3f7cec9249e sys/arch/powerpc/include/softintr.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/powerpc/include/softintr.h Wed Mar 24 23:39:39 2004 +0000
@@ -0,0 +1,70 @@
+/* $NetBSD: softintr.h,v 1.1 2004/03/24 23:39:39 matt Exp $ */
+
+/*-
+ * Copyright (c) 2004 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Matt Thomas <matt%3am-software.com@localhost>.
+ *
+ * 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.
+ */
+#ifndef __POWERPC_SOFTINTR_H_
+#define __POWERPC_SOFTINTR_H_
+
+#ifdef _KERNEL
+#include <sys/queue.h>
+
+SIMPLEQ_HEAD(softintr_qh, softintr);
+
+struct softintr {
+ SIMPLEQ_ENTRY(softintr) si_link;
+ void (*si_func)(void *); /* callback */
+ void *si_arg; /* argument to si_func */
+ int si_ipl; /* IPL_SOFT* */
+ int si_refs; /* either 1 or 2 */
+};
+
+/*
+ * Override the standard schednetisr and have one softintr per netisr.
+ * Note that this allows for eventually doing dynamic registration of netisr's.
+ */
+extern struct softintr *softnet_handlers[];
+#define schednetisr(an_isr) softintr_schedule(softnet_handlers[(an_isr)])
+
+void *softintr_establish(int, void (*)(void *), void *);
+void softintr_disestablish(void *);
+void softintr_schedule(void *);
+
+void softintr__init(void);
+void softintr__run(int);
+
+#endif
+
+#endif /* __POWERPC_SOFTINTR_H_ */
diff -r b68e948a1648 -r e3f7cec9249e sys/arch/powerpc/powerpc/softintr.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/powerpc/powerpc/softintr.c Wed Mar 24 23:39:39 2004 +0000
@@ -0,0 +1,197 @@
+/*-
+ * Copyright (c) 2004 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Matt Thomas <matt%3am-software.com@localhost>
+ *
+ * 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/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: softintr.c,v 1.1 2004/03/24 23:39:39 matt Exp $");
+
+#include <sys/param.h>
+#include <lib/libkern/libkern.h>
+#include <sys/pool.h>
+#include <machine/intr.h>
+#include <net/netisr.h>
+
+static struct softintr_qh
+#ifdef IPL_SOFTI2C
+ softintr_softi2c = SIMPLEQ_HEAD_INITIALIZER(softintr_softi2c),
+#endif
+ softintr_softnet = SIMPLEQ_HEAD_INITIALIZER(softintr_softnet),
+ softintr_softclock = SIMPLEQ_HEAD_INITIALIZER(softintr_softclock),
+ softintr_softserial = SIMPLEQ_HEAD_INITIALIZER(softintr_softserial);
+
+static struct pool softintr_pool;
+struct softintr *softnet_handlers[32];
+
+static __inline struct softintr_qh *
+softintr_queue(int ipl)
+{
+ switch (ipl) {
+ case IPL_SOFTSERIAL: return &softintr_softserial;
+ case IPL_SOFTNET: return &softintr_softnet;
+ case IPL_SOFTCLOCK: return &softintr_softclock;
+#ifdef IPL_SOFTI2C
+ case IPL_SOFTI2C: return &softintr_softi2c;
+#endif
+ default:
+ KASSERT(ipl == IPL_SOFTSERIAL || ipl == IPL_SOFTNET || ipl == IPL_SOFTCLOCK);
+ }
+ return NULL;
+}
+
+void
+softintr__init(void)
+{
+ pool_init(&softintr_pool, sizeof(struct softintr), 0, 0, 0,
+ "sipl", &pool_allocator_nointr);
+
+#define DONETISR(n, f) \
+ softnet_handlers[(n)] = \
+ softintr_establish(IPL_SOFTNET, (void (*)(void *))(f), NULL)
+#include <net/netisr_dispatch.h>
+#undef DONETISR
+}
+
+/*
+ * This routine is called by the platform dependent intrcode to
+ * run the queue of softintr schedules. It is expected to already be
+ * at the appropriate IPL upon entry.
+ */
+void
+softintr__run(int ipl)
+{
+ struct softintr_qh * const qh = softintr_queue(ipl);
+ struct softintr *si;
+ int s;
+
+ for (;;) {
+ s = splvm();
+ si = SIMPLEQ_FIRST(qh);
+ if (si == NULL) {
+ splx(s);
+ return;
+ }
+ SIMPLEQ_REMOVE_HEAD(qh, si_link);
+ si->si_refs--;
+ KASSERT(si->si_refs > 0);
+ splx(s);
+
+ (*si->si_func)(si->si_arg);
+ }
+}
+
+/*
+ * This schedules a software interrupt handler.
+ * It may be called from any IPL >= the IPL of the handler.
+ */
+void
+softintr_schedule(void *cookie)
+{
+ struct softintr * const si = cookie;
+ struct softintr_qh * const qh = softintr_queue(si->si_ipl);
+ int s;
+
+ /*
+ * Assume checking a single integer field is atomic.
+ */
+ if (si->si_refs > 1)
+ return;
+
+ /*
+ * Raise IPL and insert onto queue.
+ */
+ s = splvm();
+ SIMPLEQ_INSERT_TAIL(qh, si, si_link);
+ si->si_refs++;
+ switch (si->si_ipl) {
+ case IPL_SOFTSERIAL: setsoftserial(); break;
+ case IPL_SOFTCLOCK: setsoftclock(); break;
+ case IPL_SOFTNET: setsoftnet(); break;
+#ifdef IPL_SOFTI2C
+ case IPL_SOFTNET: setsofti2c(); break;
+#endif
+ }
+ splx(s);
+}
+
+/*
+ * Establish (allocate) a software interrupt handler.
+ * This must be called from a threaded context at an IPL <= IPL_VM
+ */
+void *
+softintr_establish(int ipl, void (*func)(void *), void *arg)
+{
+ struct softintr *si;
+ int s;
+
+ s = splvm();
+ si = pool_get(&softintr_pool, PR_WAITOK);
+ splx(s);
+ if (si == NULL)
+ return NULL;
+
+ si->si_ipl = ipl;
+ si->si_func = func;
+ si->si_arg = arg;
+ si->si_refs = 1;
+ return si;
+}
+
+/*
+ * Disestablish (free) a software interrupt handler.
+ * This must be called from a threaded context at an IPL <= IPL_VM
+ */
+void
+softintr_disestablish(void *cookie)
+{
+ struct softintr * const si = cookie;
+ int s;
+
+ s = splvm();
+ /*
+ * If queued, dequeue the entry.
+ */
+ if (si->si_refs > 1) {
+ struct softintr_qh * const qh = softintr_queue(si->si_ipl);
+ SIMPLEQ_REMOVE(qh, si, softintr, si_link);
+ si->si_refs--;
+ }
+
+ /*
+ * Make sure we always put to the pool at a consistent IPL.
+ */
+ si->si_refs--;
+ KASSERT(si->si_refs == 0);
+ pool_put(&softintr_pool, si);
+ splx(s);
+}
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