NetBSD/sys/arch/atari/isa/isa_machdep.c

218 lines
5.4 KiB
C

/* $NetBSD: isa_machdep.c,v 1.2 1997/08/27 06:56:14 leo Exp $ */
/*
* Copyright (c) 1997 Leo Weppelman. All rights reserved.
* Copyright (c) 1996 Christopher G. Demetriou. All rights reserved.
* Copyright (c) 1994 Charles Hannum. All rights reserved.
*
* 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 Charles Hannum.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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/types.h>
#include <sys/param.h>
#include <sys/time.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/device.h>
#include <vm/vm.h>
#include <vm/vm_kern.h>
#include <dev/isa/isavar.h>
#include <dev/isa/isareg.h>
#include <machine/bus.h>
#include <machine/cpu.h>
#include <machine/iomap.h>
#include <machine/mfp.h>
#include <atari/atari/device.h>
static int isabusprint __P((void *auxp, const char *));
static int isabusmatch __P((struct device *, struct cfdata *, void *));
static void isabusattach __P((struct device *, struct device *, void *));
struct cfattach isabus_ca = {
sizeof(struct device), isabusmatch, isabusattach
};
struct cfdriver isabus_cd = {
NULL, "isabus", DV_DULL
};
int
isabusmatch(pdp, cfp, auxp)
struct device *pdp;
struct cfdata *cfp;
void *auxp;
{
if(atari_realconfig == 0)
return (0);
if (strcmp((char *)auxp, "isabus") || cfp->cf_unit != 0)
return(0);
return(machineid & ATARI_HADES ? 1 : 0);
}
void
isabusattach(pdp, dp, auxp)
struct device *pdp, *dp;
void *auxp;
{
struct isabus_attach_args iba;
iba.iba_busname = "isa";
iba.iba_iot = ISA_IOSTART;
iba.iba_memt = ISA_MEMSTART;
MFP->mf_aer |= (IO_ISA1|IO_ISA2); /* ISA interrupts: LOW->HIGH */
printf("\n");
config_found(dp, &iba, isabusprint);
}
int
isabusprint(auxp, name)
void *auxp;
const char *name;
{
if(name == NULL)
return(UNCONF);
return(QUIET);
}
void
isa_attach_hook(parent, self, iba)
struct device *parent, *self;
struct isabus_attach_args *iba;
{
}
/*
* The interrupt stuff is rather ugly. On the Hades, all interrupt lines
* for a slot are wired together and connected to either IO3 (slot1) or
* IO7 (slot2). Since no info can be obtained about the slot position
* at isa_intr_establish() time, the following assumption is made:
* - irq <= 6 -> slot 1
* - irq > 6 -> slot 2
*/
static isa_intr_info_t iinfo[2] = { { -1 }, { -1 } };
static int iifun __P((int, int));
static int
iifun(slot, sr)
int slot;
int sr;
{
isa_intr_info_t *iinfo_p;
int s;
iinfo_p = &iinfo[slot];
/*
* Disable the interrupts
*/
if (slot == 0)
MFP->mf_imrb &= ~(IB_ISA1);
else MFP->mf_imra &= ~(IA_ISA2);
if ((sr & PSL_IPL) >= iinfo_p->ipl) {
/*
* We're running at a too high priority now.
*/
add_sicallback((si_farg)iifun, (void*)slot, 0);
}
else {
s = splx(iinfo_p->ipl);
(void) (iinfo_p->ifunc)(iinfo_p->iarg, 0);
splx(s);
/*
* Re-enable interrupts after handling
*/
if (slot == 0)
MFP->mf_imrb |= IB_ISA1;
else MFP->mf_imra |= IA_ISA2;
}
return 1;
}
void *
isa_intr_establish(ic, irq, type, level, ih_fun, ih_arg)
isa_chipset_tag_t ic;
int irq, type, level;
hw_ifun_t ih_fun;
void *ih_arg;
{
isa_intr_info_t *iinfo_p;
struct intrhand *ihand;
int slot;
slot = (irq <= 6) ? 0 : 1;
iinfo_p = &iinfo[slot];
if (iinfo_p->slot > 0)
panic("isa_intr_establish: interrupt was already established\n");
ihand = intr_establish((slot == 0) ? 3 : 15, USER_VEC, 0,
(hw_ifun_t)iifun, (void *)slot);
if (ihand != NULL) {
iinfo_p->slot = slot;
iinfo_p->ipl = level;
iinfo_p->ifunc = ih_fun;
iinfo_p->iarg = ih_arg;
iinfo_p->ihand = ihand;
/*
* Enable (unmask) the interrupt
*/
if (slot == 0) {
MFP->mf_imrb |= IB_ISA1;
MFP->mf_ierb |= IB_ISA1;
}
else {
MFP->mf_imra |= IA_ISA2;
MFP->mf_iera |= IA_ISA2;
}
return(iinfo_p);
}
return NULL;
}
void
isa_intr_disestablish(ic, handler)
isa_chipset_tag_t ic;
void *handler;
{
isa_intr_info_t *iinfo_p = (isa_intr_info_t *)handler;
if (iinfo_p->slot < 0)
panic("isa_intr_disestablish: interrupt was not established\n");
(void) intr_disestablish(iinfo_p->ihand);
iinfo_p->slot = -1;
}