1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25 
  26 /*
  27  * Determine the PCI configuration mechanism recommended by the BIOS.
  28  */
  29 
  30 #include <sys/types.h>
  31 #include <sys/sunddi.h>
  32 #include <sys/pci_impl.h>
  33 #include <sys/ddi_subrdefs.h>
  34 #include <sys/bootconf.h>
  35 #include <sys/psw.h>
  36 #include <sys/modctl.h>
  37 #include <sys/errno.h>
  38 #include <sys/pci.h>
  39 #include <sys/pci_cfgspace.h>
  40 #include <sys/reboot.h>
  41 #include <sys/pci_cfgspace_impl.h>
  42 #include <sys/mutex.h>
  43 
  44 extern int pci_boot_debug;
  45 
  46 /*
  47  * Interface routines
  48  */
  49 void pci_enumerate(int);
  50 void pci_setup_tree(void);
  51 void pci_reprogram(void);
  52 void bus_res_fini(void);
  53 
  54 static struct modlmisc modlmisc = {
  55         &mod_miscops, "PCI BIOS interface"
  56 };
  57 
  58 static struct modlinkage modlinkage = {
  59         MODREV_1, (void *)&modlmisc, NULL
  60 };
  61 
  62 int
  63 _init(void)
  64 {
  65         int     err;
  66 
  67         if ((err = mod_install(&modlinkage)) != 0)
  68                 return (err);
  69 
  70         impl_bus_add_probe(pci_enumerate);
  71         return (0);
  72 }
  73 
  74 int
  75 _fini(void)
  76 {
  77         int     err;
  78 
  79         if ((err = mod_remove(&modlinkage)) != 0)
  80                 return (err);
  81 
  82         impl_bus_delete_probe(pci_enumerate);
  83         bus_res_fini();
  84         return (0);
  85 }
  86 
  87 int
  88 _info(struct modinfo *modinfop)
  89 {
  90         return (mod_info(&modlinkage, modinfop));
  91 }
  92 
  93 
  94 /*
  95  * This function is invoked twice: first time, with reprogram=0 to
  96  * set up the PCI portion of the device tree. The second time is
  97  * for reprogramming devices not set up by the BIOS.
  98  */
  99 void
 100 pci_enumerate(int reprogram)
 101 {
 102         extern void add_pci_fixes(void);
 103         extern void undo_pci_fixes(void);
 104 
 105         add_pci_fixes();
 106 
 107         if (reprogram) {
 108                 pci_reprogram();
 109                 undo_pci_fixes();
 110                 return;
 111         }
 112 
 113         /* setup device tree */
 114         pci_setup_tree();
 115         undo_pci_fixes();
 116 }