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      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 }
    117