hw/intc/s390_flic.c

   1 /*
   2  * QEMU S390x floating interrupt controller (flic)
   3  *
   4  * Copyright 2014 IBM Corp.
   5  * Author(s): Jens Freimann <jfrei@linux.vnet.ibm.com>
   6  *            Cornelia Huck <cornelia.huck@de.ibm.com>
   7  *
   8  * This work is licensed under the terms of the GNU GPL, version 2 or (at
   9  * your option) any later version. See the COPYING file in the top-level
  10  * directory.
  11  */
  12
  13 #include "qemu/osdep.h"
  14 #include "qemu/error-report.h"
  15 #include "hw/sysbus.h"
  16 #include "migration/qemu-file.h"
  17 #include "hw/s390x/s390_flic.h"
  18 #include "trace.h"
  19
  20 S390FLICState *s390_get_flic(void)
  21 {
  22     S390FLICState *fs;
  23
  24     fs = S390_FLIC_COMMON(object_resolve_path(TYPE_KVM_S390_FLIC, NULL));
  25     if (!fs) {
  26         fs = S390_FLIC_COMMON(object_resolve_path(TYPE_QEMU_S390_FLIC, NULL));
  27     }
  28     return fs;
  29 }
  30
  31 void s390_flic_init(void)
  32 {
  33     DeviceState *dev;
  34
  35     dev = s390_flic_kvm_create();
  36     if (!dev) {
  37         dev = qdev_create(NULL, TYPE_QEMU_S390_FLIC);
  38         object_property_add_child(qdev_get_machine(), TYPE_QEMU_S390_FLIC,
  39                                   OBJECT(dev), NULL);
  40     }
  41     qdev_init_nofail(dev);
  42 }
  43
  44 static int qemu_s390_register_io_adapter(S390FLICState *fs, uint32_t id,
  45                                          uint8_t isc, bool swap,
  46                                          bool is_maskable)
  47 {
  48     /* nothing to do */
  49     return 0;
  50 }
  51
  52 static int qemu_s390_io_adapter_map(S390FLICState *fs, uint32_t id,
  53                                     uint64_t map_addr, bool do_map)
  54 {
  55     /* nothing to do */
  56     return 0;
  57 }
  58
  59 static int qemu_s390_add_adapter_routes(S390FLICState *fs,
  60                                         AdapterRoutes *routes)
  61 {
  62     return -ENOSYS;
  63 }
  64
  65 static void qemu_s390_release_adapter_routes(S390FLICState *fs,
  66                                              AdapterRoutes *routes)
  67 {
  68 }
  69
  70 static int qemu_s390_clear_io_flic(S390FLICState *fs, uint16_t subchannel_id,
  71                            uint16_t subchannel_nr)
  72 {
  73     /* Fixme TCG */
  74     return -ENOSYS;
  75 }
  76
  77 static void qemu_s390_flic_class_init(ObjectClass *oc, void *data)
  78 {
  79     S390FLICStateClass *fsc = S390_FLIC_COMMON_CLASS(oc);
  80
  81     fsc->register_io_adapter = qemu_s390_register_io_adapter;
  82     fsc->io_adapter_map = qemu_s390_io_adapter_map;
  83     fsc->add_adapter_routes = qemu_s390_add_adapter_routes;
  84     fsc->release_adapter_routes = qemu_s390_release_adapter_routes;
  85     fsc->clear_io_irq = qemu_s390_clear_io_flic;
  86 }
  87
  88 static const TypeInfo qemu_s390_flic_info = {
  89     .name          = TYPE_QEMU_S390_FLIC,
  90     .parent        = TYPE_S390_FLIC_COMMON,
  91     .instance_size = sizeof(QEMUS390FLICState),
  92     .class_init    = qemu_s390_flic_class_init,
  93 };
  94
  95 static const TypeInfo s390_flic_common_info = {
  96     .name          = TYPE_S390_FLIC_COMMON,
  97     .parent        = TYPE_SYS_BUS_DEVICE,
  98     .instance_size = sizeof(S390FLICState),
  99     .class_size    = sizeof(S390FLICStateClass),
 100 };
 101
 102 static void qemu_s390_flic_register_types(void)
 103 {
 104     type_register_static(&s390_flic_common_info);
 105     type_register_static(&qemu_s390_flic_info);
 106 }
 107
 108 type_init(qemu_s390_flic_register_types)