1 /* $NetBSD: lca.c,v 1.20 1997/06/06 23:54:30 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1995, 1996 Carnegie-Mellon University. 5 * All rights reserved. 6 * 7 * Authors: Jeffrey Hsu and 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 <machine/options.h> /* Config options headers */ 31 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 32 33 __KERNEL_RCSID(0, "$NetBSD: lca.c,v 1.20 1997/06/06 23:54:30 thorpej Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/malloc.h> 39 #include <sys/device.h> 40 #include <vm/vm.h> 41 42 #include <machine/autoconf.h> 43 #include <machine/rpb.h> 44 45 #include <dev/isa/isareg.h> 46 #include <dev/isa/isavar.h> 47 48 #include <dev/pci/pcireg.h> 49 #include <dev/pci/pcivar.h> 50 #include <alpha/pci/lcareg.h> 51 #include <alpha/pci/lcavar.h> 52 #ifdef DEC_AXPPCI_33 53 #include <alpha/pci/pci_axppci_33.h> 54 #endif 55 56 int lcamatch __P((struct device *, struct cfdata *, void *)); 57 void lcaattach __P((struct device *, struct device *, void *)); 58 59 struct cfattach lca_ca = { 60 sizeof(struct lca_softc), lcamatch, lcaattach, 61 }; 62 63 struct cfdriver lca_cd = { 64 NULL, "lca", DV_DULL, 65 }; 66 67 static int lcaprint __P((void *, const char *pnp)); 68 69 /* There can be only one. */ 70 int lcafound; 71 struct lca_config lca_configuration; 72 73 int 74 lcamatch(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 LCA. */ 82 if (strcmp(ca->ca_name, lca_cd.cd_name) != 0) 83 return (0); 84 85 if (lcafound) 86 return (0); 87 88 return (1); 89 } 90 91 /* 92 * Set up the chipset's function pointers. 93 */ 94 void 95 lca_init(lcp, mallocsafe) 96 struct lca_config *lcp; 97 int mallocsafe; 98 { 99 100 /* 101 * The LCA HAE register is WRITE-ONLY, so we can't tell where 102 * the second sparse window is actually mapped. Therefore, 103 * we have to guess where it is. This seems to be the normal 104 * address. 105 */ 106 lcp->lc_s_mem_w2_masked_base = 0x80000000; 107 108 if (!lcp->lc_initted) { 109 /* don't do these twice since they set up extents */ 110 lcp->lc_iot = lca_bus_io_init(lcp); 111 lcp->lc_memt = lca_bus_mem_init(lcp); 112 } 113 lcp->lc_mallocsafe = mallocsafe; 114 115 lca_pci_init(&lcp->lc_pc, lcp); 116 117 /* 118 * Refer to ``DECchip 21066 and DECchip 21068 Alpha AXP Microprocessors 119 * Hardware Reference Manual''. 120 * ... 121 */ 122 123 /* 124 * According to section 6.4.1, all bits of the IOC_HAE register are 125 * undefined after reset. Bits <31:27> are write-only. However, we 126 * cannot blindly set it to zero. The serial ROM code that initializes 127 * the PCI devices' address spaces, allocates sparse memory blocks in 128 * the range that must use the IOC_HAE register for address translation, 129 * and sets this register accordingly (see section 6.4.14). 130 * 131 * IOC_HAE left AS IS. 132 */ 133 134 /* According to section 6.4.2, all bits of the IOC_CONF register are 135 * undefined after reset. Bits <1:0> are write-only. Set them to 136 * 0x00 for PCI Type 0 configuration access. 137 * 138 * IOC_CONF set to ZERO. 139 */ 140 REGVAL64(LCA_IOC_CONF) = 0; 141 142 lca_dma_init(lcp); 143 144 lcp->lc_initted = 1; 145 } 146 147 void 148 lcaattach(parent, self, aux) 149 struct device *parent, *self; 150 void *aux; 151 { 152 struct lca_softc *sc = (struct lca_softc *)self; 153 struct lca_config *lcp; 154 struct pcibus_attach_args pba; 155 156 /* note that we've attached the chipset; can't have 2 LCAs. */ 157 /* Um, not sure about this. XXX JH */ 158 lcafound = 1; 159 160 /* 161 * set up the chipset's info; done once at console init time 162 * (maybe), but we must do it twice to take care of things 163 * that need to use memory allocation. 164 */ 165 lcp = sc->sc_lcp = &lca_configuration; 166 lca_init(lcp, 1); 167 168 /* XXX print chipset information */ 169 printf("\n"); 170 171 switch (hwrpb->rpb_type) { 172 #ifdef DEC_AXPPCI_33 173 case ST_DEC_AXPPCI_33: 174 pci_axppci_33_pickintr(lcp); 175 break; 176 #endif 177 178 default: 179 panic("lcaattach: shouldn't be here, really..."); 180 } 181 182 pba.pba_busname = "pci"; 183 pba.pba_iot = lcp->lc_iot; 184 pba.pba_memt = lcp->lc_memt; 185 pba.pba_dmat = &lcp->lc_dmat_direct; 186 pba.pba_pc = &lcp->lc_pc; 187 pba.pba_bus = 0; 188 pba.pba_flags = PCI_FLAGS_IO_ENABLED | PCI_FLAGS_MEM_ENABLED; 189 config_found(self, &pba, lcaprint); 190 } 191 192 static int 193 lcaprint(aux, pnp) 194 void *aux; 195 const char *pnp; 196 { 197 register struct pcibus_attach_args *pba = aux; 198 199 /* only PCIs can attach to LCAes; easy. */ 200 if (pnp) 201 printf("%s at %s", pba->pba_busname, pnp); 202 printf(" bus %d", pba->pba_bus); 203 return (UNCONF); 204 } 205