1 /* $NetBSD: apecs.c,v 1.27 1997/09/02 13:23:56 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@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 "opt_dec_2100_a50.h" 31 #include "opt_dec_eb64plus.h" 32 33 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 34 35 __KERNEL_RCSID(0, "$NetBSD: apecs.c,v 1.27 1997/09/02 13:23:56 thorpej Exp $"); 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/kernel.h> 40 #include <sys/malloc.h> 41 #include <sys/device.h> 42 #include <vm/vm.h> 43 44 #include <machine/autoconf.h> 45 #include <machine/rpb.h> 46 47 #include <dev/isa/isareg.h> 48 #include <dev/isa/isavar.h> 49 50 #include <dev/pci/pcireg.h> 51 #include <dev/pci/pcivar.h> 52 #include <alpha/pci/apecsreg.h> 53 #include <alpha/pci/apecsvar.h> 54 #ifdef DEC_2100_A50 55 #include <alpha/pci/pci_2100_a50.h> 56 #endif 57 58 int apecsmatch __P((struct device *, struct cfdata *, void *)); 59 void apecsattach __P((struct device *, struct device *, void *)); 60 61 struct cfattach apecs_ca = { 62 sizeof(struct apecs_softc), apecsmatch, apecsattach, 63 }; 64 65 struct cfdriver apecs_cd = { 66 NULL, "apecs", DV_DULL, 67 }; 68 69 static int apecsprint __P((void *, const char *pnp)); 70 71 /* There can be only one. */ 72 int apecsfound; 73 struct apecs_config apecs_configuration; 74 75 int 76 apecsmatch(parent, match, aux) 77 struct device *parent; 78 struct cfdata *match; 79 void *aux; 80 { 81 struct confargs *ca = aux; 82 83 /* Make sure that we're looking for an APECS. */ 84 if (strcmp(ca->ca_name, apecs_cd.cd_name) != 0) 85 return (0); 86 87 if (apecsfound) 88 return (0); 89 90 return (1); 91 } 92 93 /* 94 * Set up the chipset's function pointers. 95 */ 96 void 97 apecs_init(acp, mallocsafe) 98 struct apecs_config *acp; 99 int mallocsafe; 100 { 101 acp->ac_comanche_pass2 = 102 (REGVAL(COMANCHE_ED) & COMANCHE_ED_PASS2) != 0; 103 acp->ac_memwidth = 104 (REGVAL(COMANCHE_GCR) & COMANCHE_GCR_WIDEMEM) != 0 ? 128 : 64; 105 acp->ac_epic_pass2 = 106 (REGVAL(EPIC_DCSR) & EPIC_DCSR_PASS2) != 0; 107 108 acp->ac_haxr1 = REGVAL(EPIC_HAXR1); 109 acp->ac_haxr2 = REGVAL(EPIC_HAXR2); 110 111 if (!acp->ac_initted) { 112 /* don't do these twice since they set up extents */ 113 apecs_bus_io_init(&acp->ac_iot, acp); 114 apecs_bus_mem_init(&acp->ac_memt, acp); 115 } 116 acp->ac_mallocsafe = mallocsafe; 117 118 apecs_pci_init(&acp->ac_pc, acp); 119 120 apecs_dma_init(acp); 121 122 acp->ac_initted = 1; 123 } 124 125 void 126 apecsattach(parent, self, aux) 127 struct device *parent, *self; 128 void *aux; 129 { 130 struct apecs_softc *sc = (struct apecs_softc *)self; 131 struct apecs_config *acp; 132 struct pcibus_attach_args pba; 133 134 /* note that we've attached the chipset; can't have 2 APECSes. */ 135 apecsfound = 1; 136 137 /* 138 * set up the chipset's info; done once at console init time 139 * (maybe), but doesn't hurt to do twice. 140 */ 141 acp = sc->sc_acp = &apecs_configuration; 142 apecs_init(acp, 1); 143 144 /* XXX SGMAP FOO */ 145 146 printf(": DECchip %s Core Logic chipset\n", 147 acp->ac_memwidth == 128 ? "21072" : "21071"); 148 printf("%s: DC21071-CA pass %d, %d-bit memory bus\n", 149 self->dv_xname, acp->ac_comanche_pass2 ? 2 : 1, acp->ac_memwidth); 150 printf("%s: DC21071-DA pass %d\n", self->dv_xname, 151 acp->ac_epic_pass2 ? 2 : 1); 152 /* XXX print bcache size */ 153 154 if (!acp->ac_epic_pass2) 155 printf("WARNING: 21071-DA NOT PASS2... NO BETS...\n"); 156 157 switch (hwrpb->rpb_type) { 158 #ifdef DEC_2100_A50 159 case ST_DEC_2100_A50: 160 pci_2100_a50_pickintr(acp); 161 break; 162 #endif 163 164 default: 165 panic("apecsattach: shouldn't be here, really..."); 166 } 167 168 pba.pba_busname = "pci"; 169 pba.pba_iot = &acp->ac_iot; 170 pba.pba_memt = &acp->ac_memt; 171 pba.pba_dmat = &acp->ac_dmat_direct; 172 pba.pba_pc = &acp->ac_pc; 173 pba.pba_bus = 0; 174 pba.pba_flags = PCI_FLAGS_IO_ENABLED | PCI_FLAGS_MEM_ENABLED; 175 config_found(self, &pba, apecsprint); 176 } 177 178 static int 179 apecsprint(aux, pnp) 180 void *aux; 181 const char *pnp; 182 { 183 register struct pcibus_attach_args *pba = aux; 184 185 /* only PCIs can attach to APECSes; easy. */ 186 if (pnp) 187 printf("%s at %s", pba->pba_busname, pnp); 188 printf(" bus %d", pba->pba_bus); 189 return (UNCONF); 190 } 191