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