238 lines
6.1 KiB
C
238 lines
6.1 KiB
C
/* $NetBSD: intc.c,v 1.2 2003/07/15 02:54:37 lukem Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 2001 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by UCHIYAMA Yasushi.
|
|
*
|
|
* 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: intc.c,v 1.2 2003/07/15 02:54:37 lukem Exp $");
|
|
|
|
#include "debug_playstation2.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
|
|
#include <playstation2/ee/eevar.h>
|
|
#include <playstation2/ee/intcvar.h>
|
|
#include <playstation2/ee/intcreg.h>
|
|
#include <playstation2/ee/gsvar.h> /* debug monitor */
|
|
|
|
#include <playstation2/playstation2/interrupt.h>
|
|
|
|
#ifdef DEBUG
|
|
#define LEGAL_CHANNEL(x) ((x) >= 0 && (x) <= 15)
|
|
#define STATIC
|
|
#else
|
|
#define STATIC static
|
|
#endif
|
|
|
|
#define _INTC_NINTR 16
|
|
|
|
u_int32_t __intc_enabled_channel;
|
|
|
|
STATIC int __intc_initialized;
|
|
STATIC struct _ipl_dispatcher __intc_dispatcher[_INTC_NINTR];
|
|
STATIC struct _ipl_holder __intc_ipl_holder[_IPL_N];
|
|
|
|
STATIC SLIST_HEAD(, _ipl_dispatcher) __intc_dispatcher_head =
|
|
SLIST_HEAD_INITIALIZER(__intc_dispatcher_head);
|
|
|
|
void
|
|
intc_init()
|
|
{
|
|
int i;
|
|
|
|
if (__intc_initialized++)
|
|
return;
|
|
|
|
/* disable all channel */
|
|
for (i = 0; i < _INTC_NINTR; i++)
|
|
intc_intr_disable(i);
|
|
|
|
/* clear interrupts */
|
|
_reg_write_4(I_STAT_REG, _reg_read_4(I_STAT_REG));
|
|
|
|
for (i = 0; i < _IPL_N; i++)
|
|
__intc_ipl_holder[i].mask = 0xffffffff;
|
|
}
|
|
|
|
int
|
|
intc_intr(u_int32_t mask)
|
|
{
|
|
struct _ipl_dispatcher *dispatcher;
|
|
u_int32_t r, dispatch, pending;
|
|
|
|
r = _reg_read_4(I_STAT_REG);
|
|
dispatch = r & ~mask & __intc_enabled_channel;
|
|
pending = r & mask & __intc_enabled_channel;
|
|
|
|
#if 0
|
|
__gsfb_print(1,
|
|
"INTC stat=%08x, mask=%08x, pend=%08x, disp=%08x enable=%08x\n",
|
|
r, mask, pending, dispatch, __intc_enabled_channel);
|
|
#endif
|
|
if (dispatch == 0)
|
|
return (pending == 0 ? 1 : 0);
|
|
|
|
/* clear interrupt */
|
|
_reg_write_4(I_STAT_REG, dispatch);
|
|
|
|
/* dispatch interrupt handler */
|
|
SLIST_FOREACH(dispatcher, &__intc_dispatcher_head, link) {
|
|
if (dispatcher->bit & dispatch) {
|
|
KDASSERT(dispatcher->func);
|
|
(*dispatcher->func)(dispatcher->arg);
|
|
dispatch &= ~dispatcher->bit;
|
|
}
|
|
}
|
|
|
|
/* disable spurious interrupt source */
|
|
if (dispatch) {
|
|
int i, bit;
|
|
for (i = 0, bit = 1; i < _INTC_NINTR; i++, bit <<= 1) {
|
|
if (bit & dispatch) {
|
|
intc_intr_disable(i);
|
|
printf("%s: spurious interrupt %d disabled.\n",
|
|
__FUNCTION__, i);
|
|
}
|
|
}
|
|
}
|
|
|
|
return (pending == 0 ? 1 : 0);
|
|
}
|
|
|
|
void
|
|
intc_intr_enable(enum intc_channel ch)
|
|
{
|
|
u_int32_t mask;
|
|
|
|
KDASSERT(LEGAL_CHANNEL(ch));
|
|
mask = 1 << ch;
|
|
_reg_write_4(I_MASK_REG, (_reg_read_4(I_MASK_REG) & mask) ^ mask);
|
|
}
|
|
|
|
void
|
|
intc_intr_disable(enum intc_channel ch)
|
|
{
|
|
|
|
KDASSERT(LEGAL_CHANNEL(ch));
|
|
_reg_write_4(I_MASK_REG, _reg_read_4(I_MASK_REG) & (1 << ch));
|
|
}
|
|
|
|
void
|
|
intc_update_mask(u_int32_t mask)
|
|
{
|
|
u_int32_t cur_mask;
|
|
|
|
cur_mask = _reg_read_4(I_MASK_REG);
|
|
|
|
_reg_write_4(I_MASK_REG, ((cur_mask ^ ~mask) | (cur_mask & mask)) &
|
|
__intc_enabled_channel);
|
|
}
|
|
|
|
void *
|
|
intc_intr_establish(enum intc_channel ch, int ipl, int (*func)(void *),
|
|
void *arg)
|
|
{
|
|
struct _ipl_dispatcher *dispatcher = &__intc_dispatcher[ch];
|
|
struct _ipl_dispatcher *d;
|
|
u_int32_t bit;
|
|
int i, s;
|
|
|
|
KDASSERT(dispatcher->func == NULL);
|
|
|
|
s = _intr_suspend();
|
|
dispatcher->func = func;
|
|
dispatcher->arg = arg;
|
|
dispatcher->ipl = ipl;
|
|
dispatcher->channel = ch;
|
|
dispatcher->bit = bit = (1 << ch);
|
|
|
|
for (i = 0; i < _IPL_N; i++)
|
|
if (i < ipl)
|
|
__intc_ipl_holder[i].mask &= ~bit;
|
|
else
|
|
__intc_ipl_holder[i].mask |= bit;
|
|
|
|
/* insert queue IPL order */
|
|
if (SLIST_EMPTY(&__intc_dispatcher_head)) {
|
|
SLIST_INSERT_HEAD(&__intc_dispatcher_head, dispatcher, link);
|
|
} else {
|
|
SLIST_FOREACH(d, &__intc_dispatcher_head, link) {
|
|
if (SLIST_NEXT(d, link) == 0 ||
|
|
SLIST_NEXT(d, link)->ipl < ipl) {
|
|
SLIST_INSERT_AFTER(d, dispatcher, link);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
md_ipl_register(IPL_INTC, __intc_ipl_holder);
|
|
|
|
intc_intr_enable(ch);
|
|
__intc_enabled_channel |= bit;
|
|
|
|
_intr_resume(s);
|
|
|
|
return ((void *)ch);
|
|
}
|
|
|
|
void
|
|
intc_intr_disestablish(void *handle)
|
|
{
|
|
int ch = (int)(handle);
|
|
struct _ipl_dispatcher *dispatcher = &__intc_dispatcher[ch];
|
|
u_int32_t bit;
|
|
int i, s;
|
|
|
|
s = _intr_suspend();
|
|
|
|
intc_intr_disable(ch);
|
|
dispatcher->func = NULL;
|
|
|
|
SLIST_REMOVE(&__intc_dispatcher_head, dispatcher,
|
|
_ipl_dispatcher, link);
|
|
|
|
bit = dispatcher->bit;
|
|
for (i = 0; i < _IPL_N; i++)
|
|
__intc_ipl_holder[i].mask |= bit;
|
|
|
|
md_ipl_register(IPL_INTC, __intc_ipl_holder);
|
|
__intc_enabled_channel &= ~bit;
|
|
|
|
_intr_resume(s);
|
|
}
|
|
|