1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
/*
* Copyright (C) 2006 Michael Brown <mbrown@fensystems.co.uk>.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <gpxe/list.h>
#include <gpxe/tables.h>
#include <gpxe/device.h>
/**
* @file
*
* Device model
*
*/
static struct root_device root_devices[0] __table_start ( root_devices );
static struct root_device root_devices_end[0] __table_end ( root_devices );
/** Registered root devices */
static LIST_HEAD ( devices );
/**
* Register a root device
*
* @v rootdev Root device
* @ret rc Return status code
*
* Calls the root device driver's probe() method, and adds it to the
* list of registered root devices if successful.
*/
static int register_rootdev ( struct root_device *rootdev ) {
int rc;
DBG ( "Registering %s root bus\n", rootdev->name );
if ( ( rc = rootdev->driver->probe ( rootdev ) ) != 0 )
return rc;
list_add ( &rootdev->dev.siblings, &devices );
return 0;
}
/**
* Unregister a root device
*
* @v rootdev Root device
*/
static void unregister_rootdev ( struct root_device *rootdev ) {
rootdev->driver->remove ( rootdev );
list_del ( &rootdev->dev.siblings );
DBG ( "Unregistered %s root bus\n", rootdev->name );
}
/**
* Probe all devices
*
* @ret rc Return status code
*
* This initiates probing for all devices in the system. After this
* call, the device hierarchy will be populated, and all hardware
* should be ready to use.
*/
int probe_devices ( void ) {
struct root_device *rootdev;
for ( rootdev = root_devices; rootdev < root_devices_end; rootdev++ ) {
register_rootdev ( rootdev );
}
return 0;
}
/**
* Remove all devices
*
*/
void remove_devices ( void ) {
struct root_device *rootdev;
struct root_device *tmp;
list_for_each_entry_safe ( rootdev, tmp, &devices, dev.siblings ) {
unregister_rootdev ( rootdev );
}
}
|
