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cia.c revision 1.14 
      1 /*	$NetBSD: cia.c,v 1.14 1996/11/25 03:55:46 cgd Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1995, 1996 Carnegie-Mellon University.
      5  * All rights reserved.
      6  *
      7  * Author: Chris G. Demetriou
      8  *
      9  * Permission to use, copy, modify and distribute this software and
     10  * its documentation is hereby granted, provided that both the copyright
     11  * notice and this permission notice appear in all copies of the
     12  * software, derivative works or modified versions, and any portions
     13  * thereof, and that both notices appear in supporting documentation.
     14  *
     15  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     16  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     17  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     18  *
     19  * Carnegie Mellon requests users of this software to return to
     20  *
     21  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     22  *  School of Computer Science
     23  *  Carnegie Mellon University
     24  *  Pittsburgh PA 15213-3890
     25  *
     26  * any improvements or extensions that they make and grant Carnegie the
     27  * rights to redistribute these changes.
     28  */
     29 
     30 #include <sys/param.h>
     31 #include <sys/systm.h>
     32 #include <sys/kernel.h>
     33 #include <sys/malloc.h>
     34 #include <sys/device.h>
     35 #include <vm/vm.h>
     36 
     37 #include <machine/autoconf.h>
     38 #include <machine/rpb.h>
     39 
     40 #include <dev/isa/isareg.h>
     41 #include <dev/isa/isavar.h>
     42 
     43 #include <dev/pci/pcireg.h>
     44 #include <dev/pci/pcivar.h>
     45 #include <alpha/pci/ciareg.h>
     46 #include <alpha/pci/ciavar.h>
     47 #if defined(DEC_KN20AA)
     48 #include <alpha/pci/pci_kn20aa.h>
     49 #endif
     50 #if defined(DEC_EB164)
     51 #include <alpha/pci/pci_eb164.h>
     52 #endif
     53 
     54 int	ciamatch __P((struct device *, void *, void *));
     55 void	ciaattach __P((struct device *, struct device *, void *));
     56 
     57 struct cfattach cia_ca = {
     58 	sizeof(struct cia_softc), ciamatch, ciaattach,
     59 };
     60 
     61 struct cfdriver cia_cd = {
     62 	NULL, "cia", DV_DULL,
     63 };
     64 
     65 static int	ciaprint __P((void *, const char *pnp));
     66 
     67 /* There can be only one. */
     68 int ciafound;
     69 struct cia_config cia_configuration;
     70 
     71 int
     72 ciamatch(parent, match, aux)
     73 	struct device *parent;
     74 	void *match, *aux;
     75 {
     76 	struct confargs *ca = aux;
     77 
     78 	/* Make sure that we're looking for a CIA. */
     79 	if (strcmp(ca->ca_name, cia_cd.cd_name) != 0)
     80 		return (0);
     81 
     82 	if (ciafound)
     83 		return (0);
     84 
     85 	return (1);
     86 }
     87 
     88 /*
     89  * Set up the chipset's function pointers.
     90  */
     91 void
     92 cia_init(ccp, mallocsafe)
     93 	struct cia_config *ccp;
     94 	int mallocsafe;
     95 {
     96 
     97 	/*
     98 	 * Can't set up SGMAP data here; can be called before malloc().
     99 	 * XXX THIS COMMENT NO LONGER MAKES SENSE.
    100 	 */
    101 
    102 	ccp->cc_hae_mem = REGVAL(CIA_CSR_HAE_MEM);
    103 	ccp->cc_hae_io = REGVAL(CIA_CSR_HAE_IO);
    104 
    105 	if (!ccp->cc_initted) {
    106 		/* don't do these twice since they set up extents */
    107 		ccp->cc_iot = cia_bus_io_init(ccp);
    108 		ccp->cc_memt = cia_bus_mem_init(ccp);
    109 	}
    110 	ccp->cc_mallocsafe = mallocsafe;
    111 
    112 	cia_pci_init(&ccp->cc_pc, ccp);
    113 
    114 	/* XXX XXX BEGIN XXX XXX */
    115 	{							/* XXX */
    116 		extern vm_offset_t alpha_XXX_dmamap_or;		/* XXX */
    117 		alpha_XXX_dmamap_or = 0x40000000;		/* XXX */
    118 	}							/* XXX */
    119 	/* XXX XXX END XXX XXX */
    120 
    121 	ccp->cc_initted = 1;
    122 }
    123 
    124 void
    125 ciaattach(parent, self, aux)
    126 	struct device *parent, *self;
    127 	void *aux;
    128 {
    129 	struct cia_softc *sc = (struct cia_softc *)self;
    130 	struct cia_config *ccp;
    131 	struct pcibus_attach_args pba;
    132 
    133 	/* note that we've attached the chipset; can't have 2 CIAs. */
    134 	ciafound = 1;
    135 
    136 	/*
    137 	 * set up the chipset's info; done once at console init time
    138 	 * (maybe), but doesn't hurt to do twice.
    139 	 */
    140 	ccp = sc->sc_ccp = &cia_configuration;
    141 	cia_init(ccp, 1);
    142 
    143 	/* XXX print chipset information */
    144 	printf("\n");
    145 
    146 	switch (hwrpb->rpb_type) {
    147 #if defined(DEC_KN20AA)
    148 	case ST_DEC_KN20AA:
    149 		pci_kn20aa_pickintr(ccp);
    150 #ifdef EVCNT_COUNTERS
    151 		evcnt_attach(self, "intr", &kn20aa_intr_evcnt);
    152 #endif
    153 		break;
    154 #endif
    155 
    156 #if defined(DEC_EB164)
    157 	case ST_EB164:
    158 		pci_eb164_pickintr(ccp);
    159 #ifdef EVCNT_COUNTERS
    160 		evcnt_attach(self, "intr", &eb164_intr_evcnt);
    161 #endif
    162 		break;
    163 #endif
    164 
    165 	default:
    166 		panic("ciaattach: shouldn't be here, really...");
    167 	}
    168 
    169 	pba.pba_busname = "pci";
    170 	pba.pba_iot = ccp->cc_iot;
    171 	pba.pba_memt = ccp->cc_memt;
    172 	pba.pba_pc = &ccp->cc_pc;
    173 	pba.pba_bus = 0;
    174 	config_found(self, &pba, ciaprint);
    175 }
    176 
    177 static int
    178 ciaprint(aux, pnp)
    179 	void *aux;
    180 	const char *pnp;
    181 {
    182 	register struct pcibus_attach_args *pba = aux;
    183 
    184 	/* only PCIs can attach to CIAs; easy. */
    185 	if (pnp)
    186 		printf("%s at %s", pba->pba_busname, pnp);
    187 	printf(" bus %d", pba->pba_bus);
    188 	return (UNCONF);
    189 }
    190