Tony Krowiak | a51b315 | 2018-10-10 13:03:06 -0400 | [diff] [blame] | 1 | /* |
| 2 | * ap bridge |
| 3 | * |
| 4 | * Copyright 2018 IBM Corp. |
| 5 | * |
| 6 | * This work is licensed under the terms of the GNU GPL, version 2 or (at |
| 7 | * your option) any later version. See the COPYING file in the top-level |
| 8 | * directory. |
| 9 | */ |
Markus Armbruster | 0b8fa32 | 2019-05-23 16:35:07 +0200 | [diff] [blame] | 10 | |
Tony Krowiak | a51b315 | 2018-10-10 13:03:06 -0400 | [diff] [blame] | 11 | #include "qemu/osdep.h" |
| 12 | #include "qapi/error.h" |
| 13 | #include "hw/sysbus.h" |
| 14 | #include "qemu/bitops.h" |
Markus Armbruster | 0b8fa32 | 2019-05-23 16:35:07 +0200 | [diff] [blame] | 15 | #include "qemu/module.h" |
Tony Krowiak | a51b315 | 2018-10-10 13:03:06 -0400 | [diff] [blame] | 16 | #include "hw/s390x/ap-bridge.h" |
| 17 | #include "cpu.h" |
| 18 | |
| 19 | static char *ap_bus_get_dev_path(DeviceState *dev) |
| 20 | { |
| 21 | /* at most one */ |
| 22 | return g_strdup_printf("/1"); |
| 23 | } |
| 24 | |
| 25 | static void ap_bus_class_init(ObjectClass *oc, void *data) |
| 26 | { |
| 27 | BusClass *k = BUS_CLASS(oc); |
| 28 | |
| 29 | k->get_dev_path = ap_bus_get_dev_path; |
| 30 | /* More than one ap device does not make sense */ |
| 31 | k->max_dev = 1; |
| 32 | } |
| 33 | |
| 34 | static const TypeInfo ap_bus_info = { |
| 35 | .name = TYPE_AP_BUS, |
| 36 | .parent = TYPE_BUS, |
| 37 | .instance_size = 0, |
| 38 | .class_init = ap_bus_class_init, |
| 39 | }; |
| 40 | |
| 41 | void s390_init_ap(void) |
| 42 | { |
| 43 | DeviceState *dev; |
Tony Krowiak | 374b78e | 2019-02-18 14:49:56 -0500 | [diff] [blame] | 44 | BusState *bus; |
Tony Krowiak | a51b315 | 2018-10-10 13:03:06 -0400 | [diff] [blame] | 45 | |
| 46 | /* If no AP instructions then no need for AP bridge */ |
| 47 | if (!s390_has_feat(S390_FEAT_AP)) { |
| 48 | return; |
| 49 | } |
| 50 | |
| 51 | /* Create bridge device */ |
Markus Armbruster | 3e80f69 | 2020-06-10 07:31:58 +0200 | [diff] [blame] | 52 | dev = qdev_new(TYPE_AP_BRIDGE); |
Tony Krowiak | a51b315 | 2018-10-10 13:03:06 -0400 | [diff] [blame] | 53 | object_property_add_child(qdev_get_machine(), TYPE_AP_BRIDGE, |
Markus Armbruster | d262312 | 2020-05-05 17:29:22 +0200 | [diff] [blame] | 54 | OBJECT(dev)); |
Markus Armbruster | 3c6ef47 | 2020-06-10 07:32:34 +0200 | [diff] [blame] | 55 | sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal); |
Tony Krowiak | a51b315 | 2018-10-10 13:03:06 -0400 | [diff] [blame] | 56 | |
| 57 | /* Create bus on bridge device */ |
Peter Maydell | 9388d17 | 2021-09-23 13:11:52 +0100 | [diff] [blame] | 58 | bus = qbus_new(TYPE_AP_BUS, dev, TYPE_AP_BUS); |
Tony Krowiak | 374b78e | 2019-02-18 14:49:56 -0500 | [diff] [blame] | 59 | |
| 60 | /* Enable hotplugging */ |
Markus Armbruster | 9bc6bfd | 2020-06-30 11:03:39 +0200 | [diff] [blame] | 61 | qbus_set_hotplug_handler(bus, OBJECT(dev)); |
Tony Krowiak | a51b315 | 2018-10-10 13:03:06 -0400 | [diff] [blame] | 62 | } |
| 63 | |
| 64 | static void ap_bridge_class_init(ObjectClass *oc, void *data) |
| 65 | { |
| 66 | DeviceClass *dc = DEVICE_CLASS(oc); |
Tony Krowiak | 374b78e | 2019-02-18 14:49:56 -0500 | [diff] [blame] | 67 | HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc); |
Tony Krowiak | a51b315 | 2018-10-10 13:03:06 -0400 | [diff] [blame] | 68 | |
Tony Krowiak | 374b78e | 2019-02-18 14:49:56 -0500 | [diff] [blame] | 69 | hc->unplug = qdev_simple_device_unplug_cb; |
Tony Krowiak | a51b315 | 2018-10-10 13:03:06 -0400 | [diff] [blame] | 70 | set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories); |
| 71 | } |
| 72 | |
| 73 | static const TypeInfo ap_bridge_info = { |
| 74 | .name = TYPE_AP_BRIDGE, |
| 75 | .parent = TYPE_SYS_BUS_DEVICE, |
| 76 | .instance_size = 0, |
| 77 | .class_init = ap_bridge_class_init, |
Tony Krowiak | 374b78e | 2019-02-18 14:49:56 -0500 | [diff] [blame] | 78 | .interfaces = (InterfaceInfo[]) { |
| 79 | { TYPE_HOTPLUG_HANDLER }, |
| 80 | { } |
| 81 | } |
Tony Krowiak | a51b315 | 2018-10-10 13:03:06 -0400 | [diff] [blame] | 82 | }; |
| 83 | |
| 84 | static void ap_register(void) |
| 85 | { |
| 86 | type_register_static(&ap_bridge_info); |
| 87 | type_register_static(&ap_bus_info); |
| 88 | } |
| 89 | |
| 90 | type_init(ap_register) |