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apecs.c revision 1.6 
      1 /*	$NetBSD: apecs.c,v 1.6 1996/04/12 04:38:33 cgd Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1995 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/apecsreg.h>
     46 #include <alpha/pci/apecsvar.h>
     47 #include <alpha/pci/pci_2100_a50.h>
     48 
     49 int	apecsmatch __P((struct device *, void *, void *));
     50 void	apecsattach __P((struct device *, struct device *, void *));
     51 
     52 struct cfattach apecs_ca = {
     53 	sizeof(struct apecs_softc), apecsmatch, apecsattach,
     54 };
     55 
     56 struct cfdriver apecs_cd = {
     57 	NULL, "apecs", DV_DULL,
     58 };
     59 
     60 static int	apecsprint __P((void *, char *pnp));
     61 
     62 /* There can be only one. */
     63 int apecsfound;
     64 struct apecs_config apecs_configuration;
     65 
     66 int
     67 apecsmatch(parent, match, aux)
     68 	struct device *parent;
     69 	void *match, *aux;
     70 {
     71 	struct cfdata *cf = match;
     72 	struct confargs *ca = aux;
     73 
     74 	/* Make sure that we're looking for an APECS. */
     75 	if (strcmp(ca->ca_name, apecs_cd.cd_name) != 0)
     76 		return (0);
     77 
     78 	if (apecsfound)
     79 		return (0);
     80 
     81 	return (1);
     82 }
     83 
     84 /*
     85  * Set up the chipset's function pointers.
     86  */
     87 void
     88 apecs_init(acp)
     89 	struct apecs_config *acp;
     90 {
     91 
     92 	acp->ac_comanche_pass2 =
     93 	    (REGVAL(COMANCHE_ED) & COMANCHE_ED_PASS2) != 0;
     94 	acp->ac_memwidth =
     95 	    (REGVAL(COMANCHE_GCR) & COMANCHE_GCR_WIDEMEM) != 0 ? 128 : 64;
     96 	acp->ac_epic_pass2 =
     97 	    (REGVAL(EPIC_DCSR) & EPIC_DCSR_PASS2) != 0;
     98 
     99 	/*
    100 	 * Can't set up SGMAP data here; can be called before malloc().
    101 	 */
    102 
    103 	apecs_lca_bus_io_init(&acp->ac_bc, acp);
    104 	apecs_lca_bus_mem_init(&acp->ac_bc, acp);
    105 	apecs_pci_init(&acp->ac_pc, acp);
    106 
    107 	/* Turn off DMA window enables in PCI Base Reg 1. */
    108 	REGVAL(EPIC_PCI_BASE_1) = 0;
    109 	wbflush();
    110 
    111 	/* XXX SGMAP? */
    112 }
    113 
    114 void
    115 apecsattach(parent, self, aux)
    116 	struct device *parent, *self;
    117 	void *aux;
    118 {
    119 	struct apecs_softc *sc = (struct apecs_softc *)self;
    120 	struct apecs_config *acp;
    121 	struct pcibus_attach_args pba;
    122 
    123 	/* note that we've attached the chipset; can't have 2 APECSes. */
    124 	apecsfound = 1;
    125 
    126 	/*
    127 	 * set up the chipset's info; done once at console init time
    128 	 * (maybe), but doesn't hurt to do twice.
    129 	 */
    130 	acp = sc->sc_acp = &apecs_configuration;
    131 	apecs_init(acp);
    132 
    133 	/* XXX SGMAP FOO */
    134 
    135 	printf(": DECchip %s Core Logic chipset\n",
    136 	    acp->ac_memwidth == 128 ? "21072" : "21071");
    137 	printf("%s: DC21071-CA pass %d, %d-bit memory bus\n",
    138 	    self->dv_xname, acp->ac_comanche_pass2 ? 2 : 1, acp->ac_memwidth);
    139 	printf("%s: DC21071-DA pass %d\n", self->dv_xname,
    140 	    acp->ac_epic_pass2 ? 2 : 1);
    141 	/* XXX print bcache size */
    142 
    143 	if (!acp->ac_epic_pass2)
    144 		printf("WARNING: 21071-DA NOT PASS2... NO BETS...\n");
    145 
    146 	switch (hwrpb->rpb_type) {
    147 #if defined(DEC_2100_A50)
    148 	case ST_DEC_2100_A50:
    149 		pci_2100_a50_pickintr(acp);
    150 		break;
    151 #endif
    152 	default:
    153 		panic("apecsattach: shouldn't be here, really...");
    154 	}
    155 
    156 	pba.pba_busname = "pci";
    157 	pba.pba_bc = &acp->ac_bc;
    158 	pba.pba_pc = &acp->ac_pc;
    159 	pba.pba_bus = 0;
    160 	config_found(self, &pba, apecsprint);
    161 }
    162 
    163 static int
    164 apecsprint(aux, pnp)
    165 	void *aux;
    166 	char *pnp;
    167 {
    168         register struct pcibus_attach_args *pba = aux;
    169 
    170 	/* only PCIs can attach to APECSes; easy. */
    171 	if (pnp)
    172 		printf("%s at %s", pba->pba_busname, pnp);
    173 	printf(" bus %d", pba->pba_bus);
    174 	return (UNCONF);
    175 }
    176