blob: 78617e5a2be86d85ce3f0467e79549baa5af0b72 (
plain) (
blame)
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
|
/* Private driver manager declarations
*
* COPYRIGHT (c) 2009 Cobham Gaisler AB.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#include <rtems/score/apimutex.h>
/* Structure hold all information the driver manager needs to know of. Used
* internally by Driver Manager routines.
*/
struct drvmgr {
int level;
int initializing_objs;
/* Device tree Lock */
API_Mutex_Control lock;
/* The first device - The root device and it's driver */
struct drvmgr_drv *root_drv;
struct drvmgr_dev root_dev;
/*!< Linked list of all registered drivers */
struct drvmgr_list drivers;
/* Buses that reached a certain initialization level.
* Lists by Level:
* N=0 - Not intialized, just registered
* N=1..MAX-1 - Reached init level N
* N=MAX - Successfully initialized bus
*/
struct drvmgr_list buses[DRVMGR_LEVEL_MAX+1];
/* Buses failed to initialize or has been removed by not freed */
struct drvmgr_list buses_inactive;
/* Devices that reached a certain initialization level.
* Lists by Level:
* N=0 - Not intialized, just registered
* N=1..MAX-1 - Reached init level N
* N=MAX - Successfully initialized device
*/
struct drvmgr_list devices[DRVMGR_LEVEL_MAX+1];
/*!< Devices failed to initialize, removed, ignored, no driver */
struct drvmgr_list devices_inactive;
};
extern struct drvmgr drvmgr;
extern void _DRV_Manager_Lock(void);
extern void _DRV_Manager_Unlock(void);
/* The best solution is to implement the locking with a RW lock, however there
* is no such API available. Care must be taken so that dead-lock isn't created
* for example in recursive functions.
*/
#if defined(DRVMGR_USE_LOCKS) && (DRVMGR_USE_LOCKS == 1)
#define DRVMGR_LOCK_WRITE() _DRV_Manager_Lock()
#define DRVMGR_LOCK_READ() _DRV_Manager_Lock()
#define DRVMGR_UNLOCK() _DRV_Manager_Unlock()
#else
/* no locking */
#define DRVMGR_LOCK_WRITE()
#define DRVMGR_LOCK_READ()
#define DRVMGR_UNLOCK()
#endif
|