bsps/sparc/shared/amba/ambapp_parent.c

/*
 *  AMBA Plug & Play routines
 *
 *  COPYRIGHT (c) 2011
 *  Aeroflex Gaisler
 *
 *  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 <stdlib.h>
#include <ambapp.h>

struct ambapp_dev *ambapp_find_parent(struct ambapp_dev *dev)
{
  while (dev->prev) {
    if (dev == dev->prev->children)
      return dev->prev;
    dev = dev->prev;
  }
  return NULL;
}
LEON: updated AMBA PnP API The old layer had some limitations/problems for multiple AHB buses since the data structure containing all AMBA devices were allocated before scanning. The new layer create devices as they are found and memory is allocated using malloc() or bsp_early_malloc() during booting. The old 8 functions for finding a specific AHB-Slave or APB-Slave device has been replaced with one function, ambapp_for_each(), which iterates over all devices matching the specified search options and calls a user provided function. The new way lowers the footprint and makes searching more flexible. The frequency information is now supported, if the frequency of one device is reported by the user. More AHB-to-AHB bridges are supported. The API has been split into several parts in order to lower the footprint. The API also introduces the AMBAPP CORE concept, where one ambapp_core can be created from one AHB Master, AHB Slave and one APB Slave, at least one device is required for creating a core. Signed-off-by: Daniel Hellstrom <daniel@gaisler.com> 2012-04-17 16:25:38 +02:00			`/*`
			`* AMBA Plug & Play routines`
			`*`
			`* COPYRIGHT (c) 2011`
			`* Aeroflex Gaisler`
			`*`
			`* The license and distribution terms for this file may be`
			`* found in the file LICENSE in this distribution or at`
Change all references of rtems.com to rtems.org. 2014-03-21 08:10:47 +11:00			`* http://www.rtems.org/license/LICENSE.`
LEON: updated AMBA PnP API The old layer had some limitations/problems for multiple AHB buses since the data structure containing all AMBA devices were allocated before scanning. The new layer create devices as they are found and memory is allocated using malloc() or bsp_early_malloc() during booting. The old 8 functions for finding a specific AHB-Slave or APB-Slave device has been replaced with one function, ambapp_for_each(), which iterates over all devices matching the specified search options and calls a user provided function. The new way lowers the footprint and makes searching more flexible. The frequency information is now supported, if the frequency of one device is reported by the user. More AHB-to-AHB bridges are supported. The API has been split into several parts in order to lower the footprint. The API also introduces the AMBAPP CORE concept, where one ambapp_core can be created from one AHB Master, AHB Slave and one APB Slave, at least one device is required for creating a core. Signed-off-by: Daniel Hellstrom <daniel@gaisler.com> 2012-04-17 16:25:38 +02:00			`*/`

			`#include <stdlib.h>`
			`#include <ambapp.h>`

			`struct ambapp_dev ambapp_find_parent(struct ambapp_dev dev)`
			`{`
			`while (dev->prev) {`
			`if (dev == dev->prev->children)`
			`return dev->prev;`
			`dev = dev->prev;`
			`}`
			`return NULL;`
			`}`