1 /* $NetBSD: lca.c,v 1.37 2002/05/16 01:01:32 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Copyright (c) 1995, 1996 Carnegie-Mellon University. 41 * All rights reserved. 42 * 43 * Authors: Jeffrey Hsu and Chris G. Demetriou 44 * 45 * Permission to use, copy, modify and distribute this software and 46 * its documentation is hereby granted, provided that both the copyright 47 * notice and this permission notice appear in all copies of the 48 * software, derivative works or modified versions, and any portions 49 * thereof, and that both notices appear in supporting documentation. 50 * 51 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 52 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 53 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 54 * 55 * Carnegie Mellon requests users of this software to return to 56 * 57 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 58 * School of Computer Science 59 * Carnegie Mellon University 60 * Pittsburgh PA 15213-3890 61 * 62 * any improvements or extensions that they make and grant Carnegie the 63 * rights to redistribute these changes. 64 */ 65 66 #include "opt_dec_axppci_33.h" 67 #include "opt_dec_alphabook1.h" 68 #include "opt_dec_eb66.h" 69 70 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 71 72 __KERNEL_RCSID(0, "$NetBSD: lca.c,v 1.37 2002/05/16 01:01:32 thorpej Exp $"); 73 74 #include <sys/param.h> 75 #include <sys/systm.h> 76 #include <sys/kernel.h> 77 #include <sys/malloc.h> 78 #include <sys/device.h> 79 80 #include <uvm/uvm_extern.h> 81 82 #include <machine/autoconf.h> 83 #include <machine/rpb.h> 84 #include <machine/sysarch.h> 85 86 #include <dev/isa/isareg.h> 87 #include <dev/isa/isavar.h> 88 89 #include <dev/pci/pcireg.h> 90 #include <dev/pci/pcivar.h> 91 #include <alpha/pci/lcareg.h> 92 #include <alpha/pci/lcavar.h> 93 #ifdef DEC_AXPPCI_33 94 #include <alpha/pci/pci_axppci_33.h> 95 #endif 96 #ifdef DEC_ALPHABOOK1 97 #include <alpha/pci/pci_alphabook1.h> 98 #endif 99 #ifdef DEC_EB66 100 #include <alpha/pci/pci_eb66.h> 101 #endif 102 103 int lcamatch __P((struct device *, struct cfdata *, void *)); 104 void lcaattach __P((struct device *, struct device *, void *)); 105 106 struct cfattach lca_ca = { 107 sizeof(struct lca_softc), lcamatch, lcaattach, 108 }; 109 110 extern struct cfdriver lca_cd; 111 112 static int lcaprint __P((void *, const char *pnp)); 113 114 int lca_bus_get_window __P((int, int, 115 struct alpha_bus_space_translation *)); 116 117 /* There can be only one. */ 118 int lcafound; 119 struct lca_config lca_configuration; 120 121 int 122 lcamatch(parent, match, aux) 123 struct device *parent; 124 struct cfdata *match; 125 void *aux; 126 { 127 struct mainbus_attach_args *ma = aux; 128 129 /* Make sure that we're looking for a LCA. */ 130 if (strcmp(ma->ma_name, lca_cd.cd_name) != 0) 131 return (0); 132 133 if (lcafound) 134 return (0); 135 136 return (1); 137 } 138 139 /* 140 * Set up the chipset's function pointers. 141 */ 142 void 143 lca_init(lcp, mallocsafe) 144 struct lca_config *lcp; 145 int mallocsafe; 146 { 147 148 /* 149 * The LCA HAE register is WRITE-ONLY, so we can't tell where 150 * the second sparse window is actually mapped. Therefore, 151 * we have to guess where it is. This seems to be the normal 152 * address. 153 */ 154 lcp->lc_s_mem_w2_masked_base = 0x80000000; 155 156 if (!lcp->lc_initted) { 157 /* don't do these twice since they set up extents */ 158 lca_bus_io_init(&lcp->lc_iot, lcp); 159 lca_bus_mem_init(&lcp->lc_memt, lcp); 160 161 /* 162 * We have 1 I/O window and 3 MEM windows. 163 */ 164 alpha_bus_window_count[ALPHA_BUS_TYPE_PCI_IO] = 1; 165 alpha_bus_window_count[ALPHA_BUS_TYPE_PCI_MEM] = 3; 166 alpha_bus_get_window = lca_bus_get_window; 167 } 168 lcp->lc_mallocsafe = mallocsafe; 169 170 lca_pci_init(&lcp->lc_pc, lcp); 171 alpha_pci_chipset = &lcp->lc_pc; 172 173 /* 174 * Refer to ``DECchip 21066 and DECchip 21068 Alpha AXP Microprocessors 175 * Hardware Reference Manual''. 176 * ... 177 */ 178 179 /* 180 * According to section 6.4.1, all bits of the IOC_HAE register are 181 * undefined after reset. Bits <31:27> are write-only. However, we 182 * cannot blindly set it to zero. The serial ROM code that initializes 183 * the PCI devices' address spaces, allocates sparse memory blocks in 184 * the range that must use the IOC_HAE register for address translation, 185 * and sets this register accordingly (see section 6.4.14). 186 * 187 * IOC_HAE left AS IS. 188 */ 189 190 /* According to section 6.4.2, all bits of the IOC_CONF register are 191 * undefined after reset. Bits <1:0> are write-only. Set them to 192 * 0x00 for PCI Type 0 configuration access. 193 * 194 * IOC_CONF set to ZERO. 195 */ 196 REGVAL64(LCA_IOC_CONF) = 0; 197 198 lcp->lc_initted = 1; 199 } 200 201 void 202 lcaattach(parent, self, aux) 203 struct device *parent, *self; 204 void *aux; 205 { 206 struct lca_softc *sc = (struct lca_softc *)self; 207 struct lca_config *lcp; 208 struct pcibus_attach_args pba; 209 210 /* note that we've attached the chipset; can't have 2 LCAs. */ 211 /* Um, not sure about this. XXX JH */ 212 lcafound = 1; 213 214 /* 215 * set up the chipset's info; done once at console init time 216 * (maybe), but we must do it twice to take care of things 217 * that need to use memory allocation. 218 */ 219 lcp = sc->sc_lcp = &lca_configuration; 220 lca_init(lcp, 1); 221 222 /* XXX print chipset information */ 223 printf("\n"); 224 225 lca_dma_init(lcp); 226 227 switch (cputype) { 228 #ifdef DEC_AXPPCI_33 229 case ST_DEC_AXPPCI_33: 230 pci_axppci_33_pickintr(lcp); 231 break; 232 #endif 233 #ifdef DEC_ALPHABOOK1 234 case ST_ALPHABOOK1: 235 pci_alphabook1_pickintr(lcp); 236 break; 237 #endif 238 #ifdef DEC_EB66 239 case ST_EB66: 240 pci_eb66_pickintr(lcp); 241 break; 242 #endif 243 244 default: 245 panic("lcaattach: shouldn't be here, really..."); 246 } 247 248 pba.pba_busname = "pci"; 249 pba.pba_iot = &lcp->lc_iot; 250 pba.pba_memt = &lcp->lc_memt; 251 pba.pba_dmat = 252 alphabus_dma_get_tag(&lcp->lc_dmat_direct, ALPHA_BUS_PCI); 253 pba.pba_pc = &lcp->lc_pc; 254 pba.pba_bus = 0; 255 pba.pba_bridgetag = NULL; 256 pba.pba_flags = PCI_FLAGS_IO_ENABLED | PCI_FLAGS_MEM_ENABLED | 257 PCI_FLAGS_MRL_OKAY | PCI_FLAGS_MRM_OKAY | PCI_FLAGS_MWI_OKAY; 258 config_found(self, &pba, lcaprint); 259 } 260 261 static int 262 lcaprint(aux, pnp) 263 void *aux; 264 const char *pnp; 265 { 266 register struct pcibus_attach_args *pba = aux; 267 268 /* only PCIs can attach to LCAes; easy. */ 269 if (pnp) 270 printf("%s at %s", pba->pba_busname, pnp); 271 printf(" bus %d", pba->pba_bus); 272 return (UNCONF); 273 } 274 275 int 276 lca_bus_get_window(type, window, abst) 277 int type, window; 278 struct alpha_bus_space_translation *abst; 279 { 280 struct lca_config *lcp = &lca_configuration; 281 bus_space_tag_t st; 282 283 switch (type) { 284 case ALPHA_BUS_TYPE_PCI_IO: 285 st = &lcp->lc_iot; 286 break; 287 288 case ALPHA_BUS_TYPE_PCI_MEM: 289 st = &lcp->lc_memt; 290 break; 291 292 default: 293 panic("lca_bus_get_window"); 294 } 295 296 return (alpha_bus_space_get_window(st, window, abst)); 297 } 298