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98 lines
2.4 KiB
C
98 lines
2.4 KiB
C
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/*
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* Copyright (C) 2006 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <gpxe/list.h>
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#include <gpxe/tables.h>
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#include <gpxe/device.h>
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/**
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* @file
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*
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* Device model
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*
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*/
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static struct root_device root_devices[0] __table_start ( root_devices );
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static struct root_device root_devices_end[0] __table_end ( root_devices );
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/** Registered root devices */
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static LIST_HEAD ( devices );
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/**
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* Register a root device
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*
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* @v rootdev Root device
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* @ret rc Return status code
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*
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* Calls the root device driver's probe() method, and adds it to the
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* list of registered root devices if successful.
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*/
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static int register_rootdev ( struct root_device *rootdev ) {
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int rc;
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DBG ( "Registering %s root bus\n", rootdev->name );
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if ( ( rc = rootdev->driver->probe ( rootdev ) ) != 0 )
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return rc;
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list_add ( &rootdev->dev.siblings, &devices );
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return 0;
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}
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/**
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* Unregister a root device
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*
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* @v rootdev Root device
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*/
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static void unregister_rootdev ( struct root_device *rootdev ) {
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rootdev->driver->remove ( rootdev );
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list_del ( &rootdev->dev.siblings );
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DBG ( "Unregistered %s root bus\n", rootdev->name );
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}
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/**
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* Probe all devices
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*
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* @ret rc Return status code
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*
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* This initiates probing for all devices in the system. After this
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* call, the device hierarchy will be populated, and all hardware
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* should be ready to use.
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*/
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int probe_devices ( void ) {
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struct root_device *rootdev;
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for ( rootdev = root_devices; rootdev < root_devices_end; rootdev++ ) {
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register_rootdev ( rootdev );
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}
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return 0;
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}
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/**
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* Remove all devices
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*
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*/
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void remove_devices ( void ) {
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struct root_device *rootdev;
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struct root_device *tmp;
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list_for_each_entry_safe ( rootdev, tmp, &devices, dev.siblings ) {
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unregister_rootdev ( rootdev );
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}
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}
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