diff options
author | 2015-08-28 09:58:54 +0800 | |
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committer | 2015-09-01 12:44:00 +0800 | |
commit | e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb (patch) | |
tree | 66b09f592c55df2878107a468a91d21506104d3f /qemu/roms/ipxe/src/core/device.c | |
parent | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (diff) |
Add qemu 2.4.0
Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Diffstat (limited to 'qemu/roms/ipxe/src/core/device.c')
-rw-r--r-- | qemu/roms/ipxe/src/core/device.c | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/qemu/roms/ipxe/src/core/device.c b/qemu/roms/ipxe/src/core/device.c new file mode 100644 index 000000000..330f95c5a --- /dev/null +++ b/qemu/roms/ipxe/src/core/device.c @@ -0,0 +1,136 @@ +/* + * 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., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +FILE_LICENCE ( GPL2_OR_LATER ); + +#include <string.h> +#include <ipxe/list.h> +#include <ipxe/tables.h> +#include <ipxe/init.h> +#include <ipxe/interface.h> +#include <ipxe/device.h> + +/** + * @file + * + * Device model + * + */ + +/** Registered root devices */ +static LIST_HEAD ( devices ); + +/** Device removal inhibition counter */ +int device_keep_count = 0; + +/** + * 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 booting __unused ) { + struct root_device *rootdev; + struct root_device *tmp; + + if ( device_keep_count != 0 ) { + 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, +}; + +/** + * Identify a device behind an interface + * + * @v intf Interface + * @ret device Device, or NULL + */ +struct device * identify_device ( struct interface *intf ) { + struct interface *dest; + identify_device_TYPE ( void * ) *op = + intf_get_dest_op ( intf, identify_device, &dest ); + void *object = intf_object ( dest ); + void *device; + + if ( op ) { + device = op ( object ); + } else { + /* Default is to return NULL */ + device = NULL; + } + + intf_put ( dest ); + return device; +} |