288 lines
7.1 KiB
C
288 lines
7.1 KiB
C
/* $NetBSD: isa_machdep.c,v 1.16 2000/01/19 13:13:14 leo Exp $ */
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/*
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* Copyright (c) 1997 Leo Weppelman. All rights reserved.
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* Copyright (c) 1996 Christopher G. Demetriou. All rights reserved.
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* Copyright (c) 1994 Charles M. Hannum. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Charles M. Hannum.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/systm.h>
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#include <sys/errno.h>
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#include <sys/device.h>
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#include <vm/vm.h>
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#include <vm/vm_kern.h>
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#include <dev/isa/isavar.h>
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#include <dev/isa/isareg.h>
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#include <m68k/asm_single.h>
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#include <machine/bus.h>
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#include <machine/cpu.h>
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#include <machine/iomap.h>
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#include <machine/mfp.h>
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#include <atari/atari/device.h>
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static int isabusprint __P((void *auxp, const char *));
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static int isabusmatch __P((struct device *, struct cfdata *, void *));
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static void isabusattach __P((struct device *, struct device *, void *));
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struct isabus_softc {
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struct device sc_dev;
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struct atari_isa_chipset sc_chipset;
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};
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struct cfattach isabus_ca = {
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sizeof(struct isabus_softc), isabusmatch, isabusattach
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};
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int
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isabusmatch(pdp, cfp, auxp)
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struct device *pdp;
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struct cfdata *cfp;
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void *auxp;
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{
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if(atari_realconfig == 0)
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return (0);
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if (strcmp((char *)auxp, "isabus") || cfp->cf_unit != 0)
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return(0);
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return(machineid & ATARI_HADES ? 1 : 0);
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}
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void
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isabusattach(pdp, dp, auxp)
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struct device *pdp, *dp;
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void *auxp;
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{
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struct isabus_softc *sc = (struct isabus_softc *)dp;
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struct isabus_attach_args iba;
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iba.iba_busname = "isa";
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iba.iba_dmat = BUS_ISA_DMA_TAG;
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iba.iba_iot = leb_alloc_bus_space_tag(NULL);
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iba.iba_memt = leb_alloc_bus_space_tag(NULL);
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iba.iba_ic = &sc->sc_chipset;
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if ((iba.iba_iot == NULL) || (iba.iba_memt == NULL)) {
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printf("leb_alloc_bus_space_tag failed!\n");
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return;
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}
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iba.iba_iot->base = ISA_IOSTART;
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iba.iba_memt->base = ISA_MEMSTART;
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MFP->mf_aer |= (IO_ISA1|IO_ISA2); /* ISA interrupts: LOW->HIGH */
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printf("\n");
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config_found(dp, &iba, isabusprint);
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}
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int
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isabusprint(auxp, name)
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void *auxp;
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const char *name;
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{
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if(name == NULL)
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return(UNCONF);
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return(QUIET);
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}
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void
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isa_attach_hook(parent, self, iba)
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struct device *parent, *self;
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struct isabus_attach_args *iba;
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{
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}
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/*
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* The interrupt stuff is rather ugly. On the Hades, all interrupt lines
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* for a slot are wired together and connected to either IO3 (slot1) or
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* IO7 (slot2). Since no info can be obtained about the slot position
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* at isa_intr_establish() time, the following assumption is made:
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* - irq <= 6 -> slot 1
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* - irq > 6 -> slot 2
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*/
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#define SLOTNR(irq) ((irq <= 6) ? 0 : 1)
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static isa_intr_info_t iinfo[2] = { { -1 }, { -1 } };
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static int iifun __P((int, int));
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static int
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iifun(slot, sr)
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int slot;
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int sr;
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{
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isa_intr_info_t *iinfo_p;
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int s;
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iinfo_p = &iinfo[slot];
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/*
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* Disable the interrupts
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*/
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if (slot == 0) {
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single_inst_bclr_b(MFP->mf_imrb, IB_ISA1);
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}
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else {
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single_inst_bclr_b(MFP->mf_imra, IA_ISA2);
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}
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if ((sr & PSL_IPL) >= (iinfo_p->ipl & PSL_IPL)) {
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/*
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* We're running at a too high priority now.
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*/
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add_sicallback((si_farg)iifun, (void*)slot, 0);
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}
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else {
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s = splx(iinfo_p->ipl);
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if (slot == 0) {
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do {
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MFP->mf_iprb = (u_int8_t)~IB_ISA1;
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(void) (iinfo_p->ifunc)(iinfo_p->iarg);
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} while (MFP->mf_iprb & IB_ISA1);
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single_inst_bset_b(MFP->mf_imrb, IB_ISA1);
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}
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else {
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do {
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MFP->mf_ipra = (u_int8_t)~IA_ISA2;
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(void) (iinfo_p->ifunc)(iinfo_p->iarg);
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} while (MFP->mf_ipra & IA_ISA2);
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single_inst_bset_b(MFP->mf_imra, IA_ISA2);
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}
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splx(s);
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}
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return 1;
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}
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/*
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* XXXX
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* XXXX Note that this function is not really working yet! The big problem is
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* XXXX to only generate interrupts for the slot the card is in...
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*/
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int
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isa_intr_alloc(ic, mask, type, irq)
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isa_chipset_tag_t ic;
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int mask;
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int type;
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int *irq;
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{
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isa_intr_info_t *iinfo_p;
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int slot, i;
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/*
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* The Hades only supports edge triggered interrupts!
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*/
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if (type != IST_EDGE)
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return 1;
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#define MAXIRQ 10 /* XXX: Pure fiction */
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for (i = 0; i < MAXIRQ; i++) {
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if (mask & (1<<i)) {
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slot = SLOTNR(i);
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iinfo_p = &iinfo[slot];
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if (iinfo_p->slot < 0) {
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*irq = i;
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printf("WARNING: isa_intr_alloc is not yet ready!\n"
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" make sure the card is in slot %d!\n",
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slot);
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return 0;
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}
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}
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}
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return (1);
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}
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void *
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isa_intr_establish(ic, irq, type, level, ih_fun, ih_arg)
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isa_chipset_tag_t ic;
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int irq, type, level;
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int (*ih_fun) __P((void *));
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void *ih_arg;
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{
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isa_intr_info_t *iinfo_p;
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struct intrhand *ihand;
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int slot;
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/*
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* The Hades only supports edge triggered interrupts!
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*/
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if (type != IST_EDGE)
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return NULL;
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slot = SLOTNR(irq);
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iinfo_p = &iinfo[slot];
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if (iinfo_p->slot >= 0)
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panic("isa_intr_establish: interrupt was already established\n");
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ihand = intr_establish((slot == 0) ? 3 : 15, USER_VEC, 0,
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(hw_ifun_t)iifun, (void *)slot);
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if (ihand != NULL) {
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iinfo_p->slot = slot;
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iinfo_p->ipl = level;
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iinfo_p->ifunc = ih_fun;
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iinfo_p->iarg = ih_arg;
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iinfo_p->ihand = ihand;
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/*
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* Enable (unmask) the interrupt
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*/
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if (slot == 0) {
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single_inst_bset_b(MFP->mf_imrb, IB_ISA1);
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single_inst_bset_b(MFP->mf_ierb, IB_ISA1);
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}
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else {
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single_inst_bset_b(MFP->mf_imra, IA_ISA2);
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single_inst_bset_b(MFP->mf_iera, IA_ISA2);
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}
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return(iinfo_p);
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}
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return NULL;
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}
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void
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isa_intr_disestablish(ic, handler)
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isa_chipset_tag_t ic;
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void *handler;
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{
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isa_intr_info_t *iinfo_p = (isa_intr_info_t *)handler;
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if (iinfo_p->slot < 0)
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panic("isa_intr_disestablish: interrupt was not established\n");
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(void) intr_disestablish(iinfo_p->ihand);
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iinfo_p->slot = -1;
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}
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