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/* 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.com/license/LICENSE.
*/
/* Structure hold all information the driver manager needs to know of. Used
* internally by Driver Manager routines.
*/
struct rtems_driver_manager {
int level;
int initializing_objs;
/* Device tree Lock */
rtems_id 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 rtems_driver_manager drv_mgr;
extern void _DRV_Manager_Lock(void);
extern void _DRV_Manager_Unlock(void);
extern int _DRV_Manager_Init_Lock(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_INIT() _DRV_Manager_Init_Lock()
#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_INIT()
#define DRVMGR_LOCK_WRITE()
#define DRVMGR_LOCK_READ()
#define DRVMGR_UNLOCK()
#endif
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