File: [local] / sys / arch / arm / arm / softintr.c (download)
Revision 1.1.1.1 (vendor branch), Tue Mar 4 16:05:11 2008 UTC (16 years, 3 months ago) by nbrk
Branch: OPENBSD_4_2_BASE, MAIN
CVS Tags: jornada-partial-support-wip, HEAD Changes since 1.1: +0 -0 lines
Import of OpenBSD 4.2 release kernel tree with initial code to support
Jornada 720/728, StrongARM 1110-based handheld PC.
At this point kernel roots on NFS and boots into vfs_mountroot() and traps.
What is supported:
- glass console, Jornada framebuffer (jfb) works in 16bpp direct color mode
(needs some palette tweaks for non black/white/blue colors, i think)
- saic, SA11x0 interrupt controller (needs cleanup)
- sacom, SA11x0 UART (supported only as boot console for now)
- SA11x0 GPIO controller fully supported (but can't handle multiple interrupt
handlers on one gpio pin)
- sassp, SSP port on SA11x0 that attaches spibus
- Jornada microcontroller (jmcu) to control kbd, battery, etc throught
the SPI bus (wskbd attaches on jmcu, but not tested)
- tod functions seem work
- initial code for SA-1111 (chip companion) : this is TODO
Next important steps, i think:
- gpio and intc on sa1111
- pcmcia support for sa11x0 (and sa1111 help logic)
- REAL root on nfs when we have PCMCIA support (we may use any of supported pccard NICs)
- root on wd0! (using already supported PCMCIA-ATA)
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/* $OpenBSD: softintr.c,v 1.4 2007/05/29 18:10:42 miod Exp $ */
/* $NetBSD: softintr.c,v 1.2 2003/07/15 00:24:39 lukem Exp $ */
/*
* Copyright (c) 2001 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
*
* 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 for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
* 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>
/* XXX Network interrupts should be converted to new softintrs. */
#include <net/netisr.h>
#include <uvm/uvm_extern.h>
#include <machine/atomic.h>
#include <machine/intr.h>
struct soft_intrq soft_intrq[SI_NQUEUES];
struct soft_intrhand *softnet_intrhand;
void netintr(void);
/*
* softintr_init:
*
* Initialize the software interrupt system.
*/
void
softintr_init(void)
{
struct soft_intrq *siq;
int i;
for (i = 0; i < SI_NQUEUES; i++) {
siq = &soft_intrq[i];
TAILQ_INIT(&siq->siq_list);
siq->siq_si = i;
}
/* XXX Establish legacy software interrupt handlers. */
softnet_intrhand = softintr_establish(IPL_SOFTNET,
(void (*)(void *))netintr, NULL);
assert(softnet_intrhand != NULL);
}
/*
* softintr_dispatch:
*
* Process pending software interrupts on the specified queue.
*
* NOTE: We must already be at the correct interrupt priority level.
*/
void
softintr_dispatch(int si)
{
struct soft_intrq *siq = &soft_intrq[si];
struct soft_intrhand *sih;
int oldirqstate;
for (;;) {
oldirqstate = disable_interrupts(I32_bit);
sih = TAILQ_FIRST(&siq->siq_list);
if (sih == NULL) {
restore_interrupts(oldirqstate);
break;
}
TAILQ_REMOVE(&siq->siq_list, sih, sih_list);
sih->sih_pending = 0;
uvmexp.softs++;
restore_interrupts(oldirqstate);
(*sih->sih_func)(sih->sih_arg);
}
}
/*
* softintr_establish: [interface]
*
* Register a software interrupt handler.
*/
void *
softintr_establish(int ipl, void (*func)(void *), void *arg)
{
struct soft_intrhand *sih;
int si;
switch (ipl) {
case IPL_SOFT:
si = SI_SOFT;
break;
case IPL_SOFTCLOCK:
si = SI_SOFTCLOCK;
break;
case IPL_SOFTNET:
si = SI_SOFTNET;
break;
case IPL_TTY:
case IPL_SOFTSERIAL:
si = SI_SOFTSERIAL;
break;
default:
panic("softintr_establish: unknown soft IPL %d", ipl);
}
sih = malloc(sizeof(*sih), M_DEVBUF, M_NOWAIT);
if (__predict_true(sih != NULL)) {
sih->sih_func = func;
sih->sih_arg = arg;
sih->sih_siq = &soft_intrq[si];
sih->sih_pending = 0;
}
return (sih);
}
/*
* softintr_disestablish: [interface]
*
* Unregister a software interrupt handler.
*/
void
softintr_disestablish(void *arg)
{
struct soft_intrhand *sih = arg;
struct soft_intrq *siq = sih->sih_siq;
int oldirqstate;
oldirqstate = disable_interrupts(I32_bit);
if (sih->sih_pending) {
TAILQ_REMOVE(&siq->siq_list, sih, sih_list);
sih->sih_pending = 0;
}
restore_interrupts(oldirqstate);
free(sih, M_DEVBUF);
}
int netisr;
void
netintr(void)
{
int n;
while ((n = netisr) != 0) {
atomic_clearbits_int(&netisr, n);
#define DONETISR(bit, fn) \
do { \
if (n & (1 << (bit))) \
fn(); \
} while (/*CONSTCOND*/0)
#include <net/netisr_dispatch.h>
#undef DONETISR
}
}