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Annotation of sys/arch/amd64/pci/pcib.c, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: pcib.c,v 1.2 2007/01/15 23:19:05 jsg Exp $    */
                      2: /*     $NetBSD: pcib.c,v 1.6 1997/06/06 23:29:16 thorpej Exp $ */
                      3:
                      4: /*-
                      5:  * Copyright (c) 1996 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: #include <sys/param.h>
                     41: #include <sys/systm.h>
                     42: #include <sys/device.h>
                     43:
                     44: #include <machine/bus.h>
                     45: #include <dev/isa/isavar.h>
                     46:
                     47: #include <dev/pci/pcivar.h>
                     48: #include <dev/pci/pcireg.h>
                     49:
                     50: #include <dev/pci/pcidevs.h>
                     51:
                     52: #include "isa.h"
                     53:
                     54: int    pcibmatch(struct device *, void *, void *);
                     55: void   pcibattach(struct device *, struct device *, void *);
                     56: void   pcib_callback(struct device *);
                     57: int    pcib_print(void *, const char *);
                     58:
                     59: struct cfattach pcib_ca = {
                     60:        sizeof(struct device), pcibmatch, pcibattach
                     61: };
                     62:
                     63: struct cfdriver pcib_cd = {
                     64:        NULL, "pcib", DV_DULL
                     65: };
                     66:
                     67: int
                     68: pcibmatch(struct device *parent, void *match, void *aux)
                     69: {
                     70:        struct pci_attach_args *pa = aux;
                     71:
                     72:        switch (PCI_VENDOR(pa->pa_id)) {
                     73:        case PCI_VENDOR_INTEL:
                     74:                switch (PCI_PRODUCT(pa->pa_id)) {
                     75:                case PCI_PRODUCT_INTEL_SIO:
                     76:                case PCI_PRODUCT_INTEL_82371MX:
                     77:                case PCI_PRODUCT_INTEL_82371AB_ISA:
                     78:                case PCI_PRODUCT_INTEL_82440MX_ISA:
                     79:                        /* The above bridges mis-identify themselves */
                     80:                        return (1);
                     81:                }
                     82:        case PCI_VENDOR_SIS:
                     83:                switch (PCI_PRODUCT(pa->pa_id)) {
                     84:                case PCI_PRODUCT_SIS_85C503:
                     85:                        /* mis-identifies itself as a miscellaneous prehistoric */
                     86:                        return (1);
                     87:                }
                     88:        case PCI_VENDOR_VIATECH:
                     89:                switch (PCI_PRODUCT(pa->pa_id)) {
                     90:                case PCI_PRODUCT_VIATECH_VT82C686A_SMB:
                     91:                        /* mis-identifies itself as a ISA bridge */
                     92:                        return (0);
                     93:                }
                     94:        }
                     95:
                     96:        if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE &&
                     97:            PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_ISA)
                     98:                return (1);
                     99:
                    100:        return (0);
                    101: }
                    102:
                    103: void
                    104: pcibattach(struct device *parent, struct device *self, void *aux)
                    105: {
                    106:        /*
                    107:         * Cannot attach isa bus now; must postpone for various reasons
                    108:         */
                    109:        printf("\n");
                    110:
                    111:        config_defer(self, pcib_callback);
                    112: }
                    113:
                    114: void
                    115: pcib_callback(struct device *self)
                    116: {
                    117:        struct isabus_attach_args iba;
                    118:
                    119:        /*
                    120:         * Attach the ISA bus behind this bridge.
                    121:         */
                    122:        memset(&iba, 0, sizeof(iba));
                    123:        iba.iba_busname = "isa";
                    124:        iba.iba_iot = X86_BUS_SPACE_IO;
                    125:        iba.iba_memt = X86_BUS_SPACE_MEM;
                    126: #if NISADMA > 0
                    127:        iba.iba_dmat = &isa_bus_dma_tag;
                    128: #endif
                    129:        config_found(self, &iba, pcib_print);
                    130: }
                    131:
                    132: int
                    133: pcib_print(void *aux, const char *pnp)
                    134: {
                    135:        /* Only ISAs can attach to pcib's; easy. */
                    136:        if (pnp)
                    137:                printf("isa at %s", pnp);
                    138:        return (UNCONF);
                    139: }