diff options
Diffstat (limited to 'contrib/syslinux-4.02/gpxe/src/core/device.c')
-rw-r--r-- | contrib/syslinux-4.02/gpxe/src/core/device.c | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/contrib/syslinux-4.02/gpxe/src/core/device.c b/contrib/syslinux-4.02/gpxe/src/core/device.c new file mode 100644 index 0000000..96ccc9f --- /dev/null +++ b/contrib/syslinux-4.02/gpxe/src/core/device.c @@ -0,0 +1,107 @@ +/* + * Copyright (C) 2006 Michael Brown <mbrown@fensystems.co.uk>. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of the + * License, or any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +FILE_LICENCE ( GPL2_OR_LATER ); + +#include <string.h> +#include <gpxe/list.h> +#include <gpxe/tables.h> +#include <gpxe/device.h> +#include <gpxe/init.h> + +/** + * @file + * + * Device model + * + */ + +/** Registered root devices */ +static LIST_HEAD ( devices ); + +/** + * Probe a root device + * + * @v rootdev Root device + * @ret rc Return status code + */ +static int rootdev_probe ( struct root_device *rootdev ) { + int rc; + + DBG ( "Adding %s root bus\n", rootdev->dev.name ); + if ( ( rc = rootdev->driver->probe ( rootdev ) ) != 0 ) { + DBG ( "Failed to add %s root bus: %s\n", + rootdev->dev.name, strerror ( rc ) ); + return rc; + } + + return 0; +} + +/** + * Remove a root device + * + * @v rootdev Root device + */ +static void rootdev_remove ( struct root_device *rootdev ) { + rootdev->driver->remove ( rootdev ); + DBG ( "Removed %s root bus\n", rootdev->dev.name ); +} + +/** + * Probe all devices + * + * This initiates probing for all devices in the system. After this + * call, the device hierarchy will be populated, and all hardware + * should be ready to use. + */ +static void probe_devices ( void ) { + struct root_device *rootdev; + int rc; + + for_each_table_entry ( rootdev, ROOT_DEVICES ) { + list_add ( &rootdev->dev.siblings, &devices ); + INIT_LIST_HEAD ( &rootdev->dev.children ); + if ( ( rc = rootdev_probe ( rootdev ) ) != 0 ) + list_del ( &rootdev->dev.siblings ); + } +} + +/** + * Remove all devices + * + */ +static void remove_devices ( int flags ) { + struct root_device *rootdev; + struct root_device *tmp; + + if ( flags & SHUTDOWN_KEEP_DEVICES ) { + DBG ( "Refusing to remove devices on shutdown\n" ); + return; + } + + list_for_each_entry_safe ( rootdev, tmp, &devices, dev.siblings ) { + rootdev_remove ( rootdev ); + list_del ( &rootdev->dev.siblings ); + } +} + +struct startup_fn startup_devices __startup_fn ( STARTUP_NORMAL ) = { + .startup = probe_devices, + .shutdown = remove_devices, +}; |