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apecs.c revision 1.26 
      1 /* $NetBSD: apecs.c,v 1.26 1997/09/02 13:19:08 thorpej 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/cdefs.h>			/* RCS ID & Copyright macro defns */
     31 
     32 __KERNEL_RCSID(0, "$NetBSD: apecs.c,v 1.26 1997/09/02 13:19:08 thorpej Exp $");
     33 
     34 #include <sys/param.h>
     35 #include <sys/systm.h>
     36 #include <sys/kernel.h>
     37 #include <sys/malloc.h>
     38 #include <sys/device.h>
     39 #include <vm/vm.h>
     40 
     41 #include <machine/autoconf.h>
     42 #include <machine/rpb.h>
     43 
     44 #include <dev/isa/isareg.h>
     45 #include <dev/isa/isavar.h>
     46 
     47 #include <dev/pci/pcireg.h>
     48 #include <dev/pci/pcivar.h>
     49 #include <alpha/pci/apecsreg.h>
     50 #include <alpha/pci/apecsvar.h>
     51 #ifdef DEC_2100_A50
     52 #include <alpha/pci/pci_2100_a50.h>
     53 #endif
     54 
     55 int	apecsmatch __P((struct device *, struct cfdata *, void *));
     56 void	apecsattach __P((struct device *, struct device *, void *));
     57 
     58 struct cfattach apecs_ca = {
     59 	sizeof(struct apecs_softc), apecsmatch, apecsattach,
     60 };
     61 
     62 struct cfdriver apecs_cd = {
     63 	NULL, "apecs", DV_DULL,
     64 };
     65 
     66 static int	apecsprint __P((void *, const char *pnp));
     67 
     68 /* There can be only one. */
     69 int apecsfound;
     70 struct apecs_config apecs_configuration;
     71 
     72 int
     73 apecsmatch(parent, match, aux)
     74 	struct device *parent;
     75 	struct cfdata *match;
     76 	void *aux;
     77 {
     78 	struct confargs *ca = aux;
     79 
     80 	/* Make sure that we're looking for an APECS. */
     81 	if (strcmp(ca->ca_name, apecs_cd.cd_name) != 0)
     82 		return (0);
     83 
     84 	if (apecsfound)
     85 		return (0);
     86 
     87 	return (1);
     88 }
     89 
     90 /*
     91  * Set up the chipset's function pointers.
     92  */
     93 void
     94 apecs_init(acp, mallocsafe)
     95 	struct apecs_config *acp;
     96 	int mallocsafe;
     97 {
     98 	acp->ac_comanche_pass2 =
     99 	    (REGVAL(COMANCHE_ED) & COMANCHE_ED_PASS2) != 0;
    100 	acp->ac_memwidth =
    101 	    (REGVAL(COMANCHE_GCR) & COMANCHE_GCR_WIDEMEM) != 0 ? 128 : 64;
    102 	acp->ac_epic_pass2 =
    103 	    (REGVAL(EPIC_DCSR) & EPIC_DCSR_PASS2) != 0;
    104 
    105 	acp->ac_haxr1 = REGVAL(EPIC_HAXR1);
    106 	acp->ac_haxr2 = REGVAL(EPIC_HAXR2);
    107 
    108 	if (!acp->ac_initted) {
    109 		/* don't do these twice since they set up extents */
    110 		apecs_bus_io_init(&acp->ac_iot, acp);
    111 		apecs_bus_mem_init(&acp->ac_memt, acp);
    112 	}
    113 	acp->ac_mallocsafe = mallocsafe;
    114 
    115 	apecs_pci_init(&acp->ac_pc, acp);
    116 
    117 	apecs_dma_init(acp);
    118 
    119 	acp->ac_initted = 1;
    120 }
    121 
    122 void
    123 apecsattach(parent, self, aux)
    124 	struct device *parent, *self;
    125 	void *aux;
    126 {
    127 	struct apecs_softc *sc = (struct apecs_softc *)self;
    128 	struct apecs_config *acp;
    129 	struct pcibus_attach_args pba;
    130 
    131 	/* note that we've attached the chipset; can't have 2 APECSes. */
    132 	apecsfound = 1;
    133 
    134 	/*
    135 	 * set up the chipset's info; done once at console init time
    136 	 * (maybe), but doesn't hurt to do twice.
    137 	 */
    138 	acp = sc->sc_acp = &apecs_configuration;
    139 	apecs_init(acp, 1);
    140 
    141 	/* XXX SGMAP FOO */
    142 
    143 	printf(": DECchip %s Core Logic chipset\n",
    144 	    acp->ac_memwidth == 128 ? "21072" : "21071");
    145 	printf("%s: DC21071-CA pass %d, %d-bit memory bus\n",
    146 	    self->dv_xname, acp->ac_comanche_pass2 ? 2 : 1, acp->ac_memwidth);
    147 	printf("%s: DC21071-DA pass %d\n", self->dv_xname,
    148 	    acp->ac_epic_pass2 ? 2 : 1);
    149 	/* XXX print bcache size */
    150 
    151 	if (!acp->ac_epic_pass2)
    152 		printf("WARNING: 21071-DA NOT PASS2... NO BETS...\n");
    153 
    154 	switch (hwrpb->rpb_type) {
    155 #ifdef DEC_2100_A50
    156 	case ST_DEC_2100_A50:
    157 		pci_2100_a50_pickintr(acp);
    158 		break;
    159 #endif
    160 
    161 	default:
    162 		panic("apecsattach: shouldn't be here, really...");
    163 	}
    164 
    165 	pba.pba_busname = "pci";
    166 	pba.pba_iot = &acp->ac_iot;
    167 	pba.pba_memt = &acp->ac_memt;
    168 	pba.pba_dmat = &acp->ac_dmat_direct;
    169 	pba.pba_pc = &acp->ac_pc;
    170 	pba.pba_bus = 0;
    171 	pba.pba_flags = PCI_FLAGS_IO_ENABLED | PCI_FLAGS_MEM_ENABLED;
    172 	config_found(self, &pba, apecsprint);
    173 }
    174 
    175 static int
    176 apecsprint(aux, pnp)
    177 	void *aux;
    178 	const char *pnp;
    179 {
    180 	register struct pcibus_attach_args *pba = aux;
    181 
    182 	/* only PCIs can attach to APECSes; easy. */
    183 	if (pnp)
    184 		printf("%s at %s", pba->pba_busname, pnp);
    185 	printf(" bus %d", pba->pba_bus);
    186 	return (UNCONF);
    187 }
    188