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/* SPDX-License-Identifier: BSD-2-Clause */
/* Private driver manager declarations
*
* COPYRIGHT (c) 2009 Cobham Gaisler AB.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#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
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