[e7fade3] | 1 | /* Private driver manager declarations |
---|
| 2 | * |
---|
[65d1f35] | 3 | * COPYRIGHT (c) 2009 Cobham Gaisler AB. |
---|
[e7fade3] | 4 | * |
---|
| 5 | * The license and distribution terms for this file may be |
---|
| 6 | * found in the file LICENSE in this distribution or at |
---|
[0decc806] | 7 | * http://www.rtems.org/license/LICENSE. |
---|
[e7fade3] | 8 | */ |
---|
| 9 | |
---|
| 10 | /* Structure hold all information the driver manager needs to know of. Used |
---|
| 11 | * internally by Driver Manager routines. |
---|
| 12 | */ |
---|
[bb2f220] | 13 | struct drvmgr { |
---|
[e7fade3] | 14 | int level; |
---|
| 15 | int initializing_objs; |
---|
| 16 | |
---|
| 17 | /* Device tree Lock */ |
---|
| 18 | rtems_id lock; |
---|
| 19 | |
---|
| 20 | /* The first device - The root device and it's driver */ |
---|
| 21 | struct drvmgr_drv *root_drv; |
---|
| 22 | struct drvmgr_dev root_dev; |
---|
| 23 | |
---|
| 24 | /*!< Linked list of all registered drivers */ |
---|
| 25 | struct drvmgr_list drivers; |
---|
| 26 | |
---|
| 27 | /* Buses that reached a certain initialization level. |
---|
| 28 | * Lists by Level: |
---|
| 29 | * N=0 - Not intialized, just registered |
---|
| 30 | * N=1..MAX-1 - Reached init level N |
---|
| 31 | * N=MAX - Successfully initialized bus |
---|
| 32 | */ |
---|
| 33 | struct drvmgr_list buses[DRVMGR_LEVEL_MAX+1]; |
---|
| 34 | /* Buses failed to initialize or has been removed by not freed */ |
---|
| 35 | struct drvmgr_list buses_inactive; |
---|
| 36 | |
---|
| 37 | /* Devices that reached a certain initialization level. |
---|
| 38 | * Lists by Level: |
---|
| 39 | * N=0 - Not intialized, just registered |
---|
| 40 | * N=1..MAX-1 - Reached init level N |
---|
| 41 | * N=MAX - Successfully initialized device |
---|
| 42 | */ |
---|
| 43 | struct drvmgr_list devices[DRVMGR_LEVEL_MAX+1]; |
---|
| 44 | /*!< Devices failed to initialize, removed, ignored, no driver */ |
---|
| 45 | struct drvmgr_list devices_inactive; |
---|
| 46 | }; |
---|
| 47 | |
---|
[bb2f220] | 48 | extern struct drvmgr drvmgr; |
---|
[e7fade3] | 49 | |
---|
| 50 | extern void _DRV_Manager_Lock(void); |
---|
| 51 | extern void _DRV_Manager_Unlock(void); |
---|
| 52 | extern int _DRV_Manager_Init_Lock(void); |
---|
| 53 | |
---|
| 54 | /* The best solution is to implement the locking with a RW lock, however there |
---|
| 55 | * is no such API available. Care must be taken so that dead-lock isn't created |
---|
| 56 | * for example in recursive functions. |
---|
| 57 | */ |
---|
| 58 | #if defined(DRVMGR_USE_LOCKS) && (DRVMGR_USE_LOCKS == 1) |
---|
| 59 | #define DRVMGR_LOCK_INIT() _DRV_Manager_Init_Lock() |
---|
| 60 | #define DRVMGR_LOCK_WRITE() _DRV_Manager_Lock() |
---|
| 61 | #define DRVMGR_LOCK_READ() _DRV_Manager_Lock() |
---|
| 62 | #define DRVMGR_UNLOCK() _DRV_Manager_Unlock() |
---|
| 63 | #else |
---|
| 64 | /* no locking */ |
---|
| 65 | #define DRVMGR_LOCK_INIT() |
---|
| 66 | #define DRVMGR_LOCK_WRITE() |
---|
| 67 | #define DRVMGR_LOCK_READ() |
---|
| 68 | #define DRVMGR_UNLOCK() |
---|
| 69 | #endif |
---|