File: [local] / sys / arch / amd64 / amd64 / softintr.c (download)
Revision 1.1.1.1 (vendor branch), Tue Mar 4 16:05:00 2008 UTC (16 years, 6 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 1.1 2004/01/28 01:39:39 mickey Exp $ */
/* $NetBSD: softintr.c,v 1.1 2003/02/26 21:26:12 fvdl Exp $ */
/*-
* Copyright (c) 2000, 2001 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* 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.
*/
/*
* Generic soft interrupt implementation for NetBSD/x86.
*/
#include <sys/param.h>
#include <sys/malloc.h>
#include <machine/intr.h>
#include <uvm/uvm_extern.h>
struct x86_soft_intr x86_soft_intrs[X86_NSOFTINTR];
const int x86_soft_intr_to_ssir[X86_NSOFTINTR] = {
SIR_CLOCK,
SIR_NET,
SIR_SERIAL,
};
/*
* softintr_init:
*
* Initialize the software interrupt system.
*/
void
softintr_init(void)
{
struct x86_soft_intr *si;
int i;
for (i = 0; i < X86_NSOFTINTR; i++) {
si = &x86_soft_intrs[i];
TAILQ_INIT(&si->softintr_q);
simple_lock_init(&si->softintr_slock);
si->softintr_ssir = x86_soft_intr_to_ssir[i];
}
}
/*
* softintr_dispatch:
*
* Process pending software interrupts.
*/
void
softintr_dispatch(int which)
{
struct x86_soft_intr *si = &x86_soft_intrs[which];
struct x86_soft_intrhand *sih;
int s;
for (;;) {
x86_softintr_lock(si, s);
sih = TAILQ_FIRST(&si->softintr_q);
if (sih == NULL) {
x86_softintr_unlock(si, s);
break;
}
TAILQ_REMOVE(&si->softintr_q, sih, sih_q);
sih->sih_pending = 0;
x86_softintr_unlock(si, s);
uvmexp.softs++;
(*sih->sih_fn)(sih->sih_arg);
}
}
/*
* softintr_establish: [interface]
*
* Register a software interrupt handler.
*/
void *
softintr_establish(int ipl, void (*func)(void *), void *arg)
{
struct x86_soft_intr *si;
struct x86_soft_intrhand *sih;
int which;
switch (ipl) {
case IPL_SOFTCLOCK:
which = X86_SOFTINTR_SOFTCLOCK;
break;
case IPL_SOFTNET:
which = X86_SOFTINTR_SOFTNET;
break;
case IPL_TTY:
case IPL_SOFTSERIAL:
which = X86_SOFTINTR_SOFTSERIAL;
break;
default:
panic("softintr_establish");
}
si = &x86_soft_intrs[which];
sih = malloc(sizeof(*sih), M_DEVBUF, M_NOWAIT);
if (__predict_true(sih != NULL)) {
sih->sih_intrhead = si;
sih->sih_fn = func;
sih->sih_arg = arg;
sih->sih_pending = 0;
}
return (sih);
}
/*
* softintr_disestablish: [interface]
*
* Unregister a software interrupt handler.
*/
void
softintr_disestablish(void *arg)
{
struct x86_soft_intrhand *sih = arg;
struct x86_soft_intr *si = sih->sih_intrhead;
int s;
x86_softintr_lock(si, s);
if (sih->sih_pending) {
TAILQ_REMOVE(&si->softintr_q, sih, sih_q);
sih->sih_pending = 0;
}
x86_softintr_unlock(si, s);
free(sih, M_DEVBUF);
}