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cia.c revision 1.18 
      1 /* $NetBSD: cia.c,v 1.18 1997/04/07 02:01:16 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 <machine/options.h>		/* Pull in config options headers */
     31 
     32 #include <sys/param.h>
     33 #include <sys/systm.h>
     34 #include <sys/kernel.h>
     35 #include <sys/malloc.h>
     36 #include <sys/device.h>
     37 #include <vm/vm.h>
     38 
     39 #include <machine/autoconf.h>
     40 #include <machine/rpb.h>
     41 
     42 #include <dev/isa/isareg.h>
     43 #include <dev/isa/isavar.h>
     44 
     45 #include <dev/pci/pcireg.h>
     46 #include <dev/pci/pcivar.h>
     47 #include <alpha/pci/ciareg.h>
     48 #include <alpha/pci/ciavar.h>
     49 #ifdef DEC_KN20AA
     50 #include <alpha/pci/pci_kn20aa.h>
     51 #endif
     52 #ifdef DEC_EB164
     53 #include <alpha/pci/pci_eb164.h>
     54 #endif
     55 
     56 int	ciamatch __P((struct device *, struct cfdata *, void *));
     57 void	ciaattach __P((struct device *, struct device *, void *));
     58 
     59 struct cfattach cia_ca = {
     60 	sizeof(struct cia_softc), ciamatch, ciaattach,
     61 };
     62 
     63 struct cfdriver cia_cd = {
     64 	NULL, "cia", DV_DULL,
     65 };
     66 
     67 static int	ciaprint __P((void *, const char *pnp));
     68 
     69 /* There can be only one. */
     70 int ciafound;
     71 struct cia_config cia_configuration;
     72 
     73 int
     74 ciamatch(parent, match, aux)
     75 	struct device *parent;
     76 	struct cfdata *match;
     77 	void *aux;
     78 {
     79 	struct confargs *ca = aux;
     80 
     81 	/* Make sure that we're looking for a CIA. */
     82 	if (strcmp(ca->ca_name, cia_cd.cd_name) != 0)
     83 		return (0);
     84 
     85 	if (ciafound)
     86 		return (0);
     87 
     88 	return (1);
     89 }
     90 
     91 /*
     92  * Set up the chipset's function pointers.
     93  */
     94 void
     95 cia_init(ccp, mallocsafe)
     96 	struct cia_config *ccp;
     97 	int mallocsafe;
     98 {
     99 
    100 	/*
    101 	 * Can't set up SGMAP data here; can be called before malloc().
    102 	 * XXX THIS COMMENT NO LONGER MAKES SENSE.
    103 	 */
    104 
    105 	ccp->cc_hae_mem = REGVAL(CIA_CSR_HAE_MEM);
    106 	ccp->cc_hae_io = REGVAL(CIA_CSR_HAE_IO);
    107 
    108 	if (!ccp->cc_initted) {
    109 		/* don't do these twice since they set up extents */
    110 		ccp->cc_iot = cia_bus_io_init(ccp);
    111 		ccp->cc_memt = cia_bus_mem_init(ccp);
    112 	}
    113 	ccp->cc_mallocsafe = mallocsafe;
    114 
    115 	cia_pci_init(&ccp->cc_pc, ccp);
    116 
    117 	/* XXX XXX BEGIN XXX XXX */
    118 	{							/* XXX */
    119 		extern vm_offset_t alpha_XXX_dmamap_or;		/* XXX */
    120 		alpha_XXX_dmamap_or = 0x40000000;		/* XXX */
    121 	}							/* XXX */
    122 	/* XXX XXX END XXX XXX */
    123 
    124 	ccp->cc_initted = 1;
    125 }
    126 
    127 void
    128 ciaattach(parent, self, aux)
    129 	struct device *parent, *self;
    130 	void *aux;
    131 {
    132 	struct cia_softc *sc = (struct cia_softc *)self;
    133 	struct cia_config *ccp;
    134 	struct pcibus_attach_args pba;
    135 
    136 	/* note that we've attached the chipset; can't have 2 CIAs. */
    137 	ciafound = 1;
    138 
    139 	/*
    140 	 * set up the chipset's info; done once at console init time
    141 	 * (maybe), but doesn't hurt to do twice.
    142 	 */
    143 	ccp = sc->sc_ccp = &cia_configuration;
    144 	cia_init(ccp, 1);
    145 
    146 	/* XXX print chipset information */
    147 	printf("\n");
    148 
    149 	switch (hwrpb->rpb_type) {
    150 #ifdef DEC_KN20AA
    151 	case ST_DEC_KN20AA:
    152 		pci_kn20aa_pickintr(ccp);
    153 #ifdef EVCNT_COUNTERS
    154 		evcnt_attach(self, "intr", &kn20aa_intr_evcnt);
    155 #endif
    156 		break;
    157 #endif
    158 
    159 #ifdef DEC_EB164
    160 	case ST_EB164:
    161 		pci_eb164_pickintr(ccp);
    162 #ifdef EVCNT_COUNTERS
    163 		evcnt_attach(self, "intr", &eb164_intr_evcnt);
    164 #endif
    165 		break;
    166 #endif
    167 
    168 	default:
    169 		panic("ciaattach: shouldn't be here, really...");
    170 	}
    171 
    172 	pba.pba_busname = "pci";
    173 	pba.pba_iot = ccp->cc_iot;
    174 	pba.pba_memt = ccp->cc_memt;
    175 	pba.pba_pc = &ccp->cc_pc;
    176 	pba.pba_bus = 0;
    177 	config_found(self, &pba, ciaprint);
    178 }
    179 
    180 static int
    181 ciaprint(aux, pnp)
    182 	void *aux;
    183 	const char *pnp;
    184 {
    185 	register struct pcibus_attach_args *pba = aux;
    186 
    187 	/* only PCIs can attach to CIAs; easy. */
    188 	if (pnp)
    189 		printf("%s at %s", pba->pba_busname, pnp);
    190 	printf(" bus %d", pba->pba_bus);
    191 	return (UNCONF);
    192 }
    193