Home | History | Annotate | Line # | Download | only in pci
cia.c revision 1.15 
      1 /*	$NetBSD: cia.c,v 1.15 1996/12/05 01:39:35 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 #ifdef __BROKEN_INDIRECT_CONFIG
     55 int	ciamatch __P((struct device *, void *, void *));
     56 #else
     57 int	ciamatch __P((struct device *, struct cfdata *, void *));
     58 #endif
     59 void	ciaattach __P((struct device *, struct device *, void *));
     60 
     61 struct cfattach cia_ca = {
     62 	sizeof(struct cia_softc), ciamatch, ciaattach,
     63 };
     64 
     65 struct cfdriver cia_cd = {
     66 	NULL, "cia", DV_DULL,
     67 };
     68 
     69 static int	ciaprint __P((void *, const char *pnp));
     70 
     71 /* There can be only one. */
     72 int ciafound;
     73 struct cia_config cia_configuration;
     74 
     75 int
     76 ciamatch(parent, match, aux)
     77 	struct device *parent;
     78 #ifdef __BROKEN_INDIRECT_CONFIG
     79 	void *match;
     80 #else
     81 	struct cfdata *match;
     82 #endif
     83 	void *aux;
     84 {
     85 	struct confargs *ca = aux;
     86 
     87 	/* Make sure that we're looking for a CIA. */
     88 	if (strcmp(ca->ca_name, cia_cd.cd_name) != 0)
     89 		return (0);
     90 
     91 	if (ciafound)
     92 		return (0);
     93 
     94 	return (1);
     95 }
     96 
     97 /*
     98  * Set up the chipset's function pointers.
     99  */
    100 void
    101 cia_init(ccp, mallocsafe)
    102 	struct cia_config *ccp;
    103 	int mallocsafe;
    104 {
    105 
    106 	/*
    107 	 * Can't set up SGMAP data here; can be called before malloc().
    108 	 * XXX THIS COMMENT NO LONGER MAKES SENSE.
    109 	 */
    110 
    111 	ccp->cc_hae_mem = REGVAL(CIA_CSR_HAE_MEM);
    112 	ccp->cc_hae_io = REGVAL(CIA_CSR_HAE_IO);
    113 
    114 	if (!ccp->cc_initted) {
    115 		/* don't do these twice since they set up extents */
    116 		ccp->cc_iot = cia_bus_io_init(ccp);
    117 		ccp->cc_memt = cia_bus_mem_init(ccp);
    118 	}
    119 	ccp->cc_mallocsafe = mallocsafe;
    120 
    121 	cia_pci_init(&ccp->cc_pc, ccp);
    122 
    123 	/* XXX XXX BEGIN XXX XXX */
    124 	{							/* XXX */
    125 		extern vm_offset_t alpha_XXX_dmamap_or;		/* XXX */
    126 		alpha_XXX_dmamap_or = 0x40000000;		/* XXX */
    127 	}							/* XXX */
    128 	/* XXX XXX END XXX XXX */
    129 
    130 	ccp->cc_initted = 1;
    131 }
    132 
    133 void
    134 ciaattach(parent, self, aux)
    135 	struct device *parent, *self;
    136 	void *aux;
    137 {
    138 	struct cia_softc *sc = (struct cia_softc *)self;
    139 	struct cia_config *ccp;
    140 	struct pcibus_attach_args pba;
    141 
    142 	/* note that we've attached the chipset; can't have 2 CIAs. */
    143 	ciafound = 1;
    144 
    145 	/*
    146 	 * set up the chipset's info; done once at console init time
    147 	 * (maybe), but doesn't hurt to do twice.
    148 	 */
    149 	ccp = sc->sc_ccp = &cia_configuration;
    150 	cia_init(ccp, 1);
    151 
    152 	/* XXX print chipset information */
    153 	printf("\n");
    154 
    155 	switch (hwrpb->rpb_type) {
    156 #if defined(DEC_KN20AA)
    157 	case ST_DEC_KN20AA:
    158 		pci_kn20aa_pickintr(ccp);
    159 #ifdef EVCNT_COUNTERS
    160 		evcnt_attach(self, "intr", &kn20aa_intr_evcnt);
    161 #endif
    162 		break;
    163 #endif
    164 
    165 #if defined(DEC_EB164)
    166 	case ST_EB164:
    167 		pci_eb164_pickintr(ccp);
    168 #ifdef EVCNT_COUNTERS
    169 		evcnt_attach(self, "intr", &eb164_intr_evcnt);
    170 #endif
    171 		break;
    172 #endif
    173 
    174 	default:
    175 		panic("ciaattach: shouldn't be here, really...");
    176 	}
    177 
    178 	pba.pba_busname = "pci";
    179 	pba.pba_iot = ccp->cc_iot;
    180 	pba.pba_memt = ccp->cc_memt;
    181 	pba.pba_pc = &ccp->cc_pc;
    182 	pba.pba_bus = 0;
    183 	config_found(self, &pba, ciaprint);
    184 }
    185 
    186 static int
    187 ciaprint(aux, pnp)
    188 	void *aux;
    189 	const char *pnp;
    190 {
    191 	register struct pcibus_attach_args *pba = aux;
    192 
    193 	/* only PCIs can attach to CIAs; easy. */
    194 	if (pnp)
    195 		printf("%s at %s", pba->pba_busname, pnp);
    196 	printf(" bus %d", pba->pba_bus);
    197 	return (UNCONF);
    198 }
    199