Annotation of sys/arch/alpha/pci/lca.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: lca.c,v 1.19 2006/12/14 17:36:12 kettenis Exp $ */
! 2: /* $NetBSD: lca.c,v 1.14 1996/12/05 01:39:35 cgd Exp $ */
! 3:
! 4: /*-
! 5: * Copyright (c) 2000 The NetBSD Foundation, Inc.
! 6: * All rights reserved.
! 7: *
! 8: * This code is derived from software contributed to The NetBSD Foundation
! 9: * by Jason R. Thorpe.
! 10: *
! 11: * Redistribution and use in source and binary forms, with or without
! 12: * modification, are permitted provided that the following conditions
! 13: * are met:
! 14: * 1. Redistributions of source code must retain the above copyright
! 15: * notice, this list of conditions and the following disclaimer.
! 16: * 2. Redistributions in binary form must reproduce the above copyright
! 17: * notice, this list of conditions and the following disclaimer in the
! 18: * documentation and/or other materials provided with the distribution.
! 19: * 3. All advertising materials mentioning features or use of this software
! 20: * must display the following acknowledgement:
! 21: * This product includes software developed by the NetBSD
! 22: * Foundation, Inc. and its contributors.
! 23: * 4. Neither the name of The NetBSD Foundation nor the names of its
! 24: * contributors may be used to endorse or promote products derived
! 25: * from this software without specific prior written permission.
! 26: *
! 27: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
! 28: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! 29: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! 30: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
! 31: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! 32: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! 33: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 34: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! 35: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! 36: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 37: * POSSIBILITY OF SUCH DAMAGE.
! 38: */
! 39:
! 40: /*
! 41: * Copyright (c) 1995, 1996 Carnegie-Mellon University.
! 42: * All rights reserved.
! 43: *
! 44: * Authors: Jeffrey Hsu and Chris G. Demetriou
! 45: *
! 46: * Permission to use, copy, modify and distribute this software and
! 47: * its documentation is hereby granted, provided that both the copyright
! 48: * notice and this permission notice appear in all copies of the
! 49: * software, derivative works or modified versions, and any portions
! 50: * thereof, and that both notices appear in supporting documentation.
! 51: *
! 52: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
! 53: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
! 54: * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
! 55: *
! 56: * Carnegie Mellon requests users of this software to return to
! 57: *
! 58: * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
! 59: * School of Computer Science
! 60: * Carnegie Mellon University
! 61: * Pittsburgh PA 15213-3890
! 62: *
! 63: * any improvements or extensions that they make and grant Carnegie the
! 64: * rights to redistribute these changes.
! 65: */
! 66:
! 67: #include <sys/param.h>
! 68: #include <sys/systm.h>
! 69: #include <sys/kernel.h>
! 70: #include <sys/malloc.h>
! 71: #include <sys/device.h>
! 72:
! 73: #include <uvm/uvm_extern.h>
! 74:
! 75: #include <machine/autoconf.h>
! 76: #include <machine/rpb.h>
! 77:
! 78: #include <dev/isa/isareg.h>
! 79: #include <dev/isa/isavar.h>
! 80:
! 81: #include <dev/pci/pcireg.h>
! 82: #include <dev/pci/pcivar.h>
! 83: #include <alpha/pci/lcareg.h>
! 84: #include <alpha/pci/lcavar.h>
! 85: #ifdef DEC_AXPPCI_33
! 86: #include <alpha/pci/pci_axppci_33.h>
! 87: #endif
! 88: #ifdef DEC_ALPHABOOK1
! 89: #include <alpha/pci/pci_alphabook1.h>
! 90: #endif
! 91: #ifdef DEC_EB66
! 92: #include <alpha/pci/pci_eb66.h>
! 93: #endif
! 94:
! 95: int lcamatch(struct device *, void *, void *);
! 96: void lcaattach(struct device *, struct device *, void *);
! 97:
! 98: struct cfattach lca_ca = {
! 99: sizeof(struct device), lcamatch, lcaattach,
! 100: };
! 101:
! 102: struct cfdriver lca_cd = {
! 103: NULL, "lca", DV_DULL,
! 104: };
! 105:
! 106: int lcaprint(void *, const char *pnp);
! 107:
! 108: #if 0
! 109: int lca_bus_get_window(int, int,
! 110: struct alpha_bus_space_translation *);
! 111: #endif
! 112:
! 113: /* There can be only one. */
! 114: int lcafound;
! 115: struct lca_config lca_configuration;
! 116:
! 117: int
! 118: lcamatch(parent, match, aux)
! 119: struct device *parent;
! 120: void *match;
! 121: void *aux;
! 122: {
! 123: struct mainbus_attach_args *ma = aux;
! 124:
! 125: /* Make sure that we're looking for a LCA. */
! 126: if (strcmp(ma->ma_name, lca_cd.cd_name) != 0)
! 127: return (0);
! 128:
! 129: if (lcafound)
! 130: return (0);
! 131:
! 132: return (1);
! 133: }
! 134:
! 135: /*
! 136: * Set up the chipset's function pointers.
! 137: */
! 138: void
! 139: lca_init(lcp, mallocsafe)
! 140: struct lca_config *lcp;
! 141: int mallocsafe;
! 142: {
! 143:
! 144: /*
! 145: * The LCA HAE register is WRITE-ONLY, so we can't tell where
! 146: * the second sparse window is actually mapped. Therefore,
! 147: * we have to guess where it is. This seems to be the normal
! 148: * address.
! 149: */
! 150: lcp->lc_s_mem_w2_masked_base = 0x80000000;
! 151:
! 152: if (!lcp->lc_initted) {
! 153: /* don't do these twice since they set up extents */
! 154: lca_bus_io_init(&lcp->lc_iot, lcp);
! 155: lca_bus_mem_init(&lcp->lc_memt, lcp);
! 156:
! 157: #if 0
! 158: /*
! 159: * We have 1 I/O window and 3 MEM windows.
! 160: */
! 161: alpha_bus_window_count[ALPHA_BUS_TYPE_PCI_IO] = 1;
! 162: alpha_bus_window_count[ALPHA_BUS_TYPE_PCI_MEM] = 3;
! 163: alpha_bus_get_window = lca_bus_get_window;
! 164: #endif
! 165: }
! 166: lcp->lc_mallocsafe = mallocsafe;
! 167:
! 168: lca_pci_init(&lcp->lc_pc, lcp);
! 169: alpha_pci_chipset = &lcp->lc_pc;
! 170: alpha_pci_chipset->pc_name = "lca";
! 171: alpha_pci_chipset->pc_mem = LCA_PCI_SPARSE;
! 172: alpha_pci_chipset->pc_ports = LCA_PCI_SIO;
! 173: alpha_pci_chipset->pc_hae_mask = IOC_HAE_ADDREXT;
! 174: alpha_pci_chipset->pc_dense = LCA_PCI_DENSE;
! 175: alpha_pci_chipset->pc_bwx = 0;
! 176:
! 177: /*
! 178: * Refer to ``DECchip 21066 and DECchip 21068 Alpha AXP Microprocessors
! 179: * Hardware Reference Manual''.
! 180: * ...
! 181: */
! 182:
! 183: /*
! 184: * According to section 6.4.1, all bits of the IOC_HAE register are
! 185: * undefined after reset. Bits <31:27> are write-only. However, we
! 186: * cannot blindly set it to zero. The serial ROM code that initializes
! 187: * the PCI devices' address spaces, allocates sparse memory blocks in
! 188: * the range that must use the IOC_HAE register for address translation,
! 189: * and sets this register accordingly (see section 6.4.14).
! 190: *
! 191: * IOC_HAE left AS IS.
! 192: */
! 193:
! 194: /* According to section 6.4.2, all bits of the IOC_CONF register are
! 195: * undefined after reset. Bits <1:0> are write-only. Set them to
! 196: * 0x00 for PCI Type 0 configuration access.
! 197: *
! 198: * IOC_CONF set to ZERO.
! 199: */
! 200: REGVAL64(LCA_IOC_CONF) = 0;
! 201:
! 202: lcp->lc_initted = 1;
! 203: }
! 204:
! 205: void
! 206: lcaattach(parent, self, aux)
! 207: struct device *parent, *self;
! 208: void *aux;
! 209: {
! 210: struct lca_config *lcp;
! 211: struct pcibus_attach_args pba;
! 212:
! 213: /* note that we've attached the chipset; can't have 2 LCAs. */
! 214: /* Um, not sure about this. XXX JH */
! 215: lcafound = 1;
! 216:
! 217: /*
! 218: * set up the chipset's info; done once at console init time
! 219: * (maybe), but we must do it twice to take care of things
! 220: * that need to use memory allocation.
! 221: */
! 222: lcp = &lca_configuration;
! 223: lca_init(lcp, 1);
! 224:
! 225: /* XXX print chipset information */
! 226: printf("\n");
! 227:
! 228: lca_dma_init(lcp);
! 229:
! 230: switch (cputype) {
! 231: #ifdef DEC_AXPPCI_33
! 232: case ST_DEC_AXPPCI_33:
! 233: pci_axppci_33_pickintr(lcp);
! 234: break;
! 235: #endif
! 236: #ifdef DEC_ALPHABOOK1
! 237: case ST_ALPHABOOK1:
! 238: pci_alphabook1_pickintr(lcp);
! 239: break;
! 240: #endif
! 241: #ifdef DEC_EB66
! 242: case ST_EB66:
! 243: pci_eb66_pickintr(lcp);
! 244: break;
! 245: #endif
! 246:
! 247: default:
! 248: panic("lcaattach: shouldn't be here, really...");
! 249: }
! 250:
! 251: pba.pba_busname = "pci";
! 252: pba.pba_iot = &lcp->lc_iot;
! 253: pba.pba_memt = &lcp->lc_memt;
! 254: pba.pba_dmat =
! 255: alphabus_dma_get_tag(&lcp->lc_dmat_direct, ALPHA_BUS_PCI);
! 256: pba.pba_pc = &lcp->lc_pc;
! 257: pba.pba_domain = pci_ndomains++;
! 258: pba.pba_bus = 0;
! 259: pba.pba_bridgetag = NULL;
! 260: #ifdef notyet
! 261: pba.pba_flags = PCI_FLAGS_IO_ENABLED | PCI_FLAGS_MEM_ENABLED |
! 262: PCI_FLAGS_MRL_OKAY | PCI_FLAGS_MRM_OKAY | PCI_FLAGS_MWI_OKAY;
! 263: #endif
! 264: config_found(self, &pba, lcaprint);
! 265: }
! 266:
! 267: int
! 268: lcaprint(aux, pnp)
! 269: void *aux;
! 270: const char *pnp;
! 271: {
! 272: register struct pcibus_attach_args *pba = aux;
! 273:
! 274: /* only PCIs can attach to LCAes; easy. */
! 275: if (pnp)
! 276: printf("%s at %s", pba->pba_busname, pnp);
! 277: printf(" bus %d", pba->pba_bus);
! 278: return (UNCONF);
! 279: }
! 280:
! 281: #if 0
! 282: int
! 283: lca_bus_get_window(type, window, abst)
! 284: int type, window;
! 285: struct alpha_bus_space_translation *abst;
! 286: {
! 287: struct lca_config *lcp = &lca_configuration;
! 288: bus_space_tag_t st;
! 289:
! 290: switch (type) {
! 291: case ALPHA_BUS_TYPE_PCI_IO:
! 292: st = &lcp->lc_iot;
! 293: break;
! 294:
! 295: case ALPHA_BUS_TYPE_PCI_MEM:
! 296: st = &lcp->lc_memt;
! 297: break;
! 298:
! 299: default:
! 300: panic("lca_bus_get_window");
! 301: }
! 302:
! 303: return (alpha_bus_space_get_window(st, window, abst));
! 304: }
! 305: #endif
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