qemu

FORK: QEMU emulator
git clone https://git.neptards.moe/neptards/qemu.git
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ipack.c (3122B)

      1 /*
      2  * QEMU IndustryPack emulation
      3  *
      4  * Copyright (C) 2012 Igalia, S.L.
      5  * Author: Alberto Garcia <berto@igalia.com>
      6  *
      7  * This code is licensed under the GNU GPL v2 or (at your option) any
      8  * later version.
      9  */
     10 
     11 #include "qemu/osdep.h"
     12 #include "qapi/error.h"
     13 #include "qemu/module.h"
     14 #include "hw/ipack/ipack.h"
     15 #include "hw/irq.h"
     16 #include "hw/qdev-properties.h"
     17 #include "migration/vmstate.h"
     18 
     19 IPackDevice *ipack_device_find(IPackBus *bus, int32_t slot)
     20 {
     21     BusChild *kid;
     22 
     23     QTAILQ_FOREACH(kid, &BUS(bus)->children, sibling) {
     24         DeviceState *qdev = kid->child;
     25         IPackDevice *ip = IPACK_DEVICE(qdev);
     26         if (ip->slot == slot) {
     27             return ip;
     28         }
     29     }
     30     return NULL;
     31 }
     32 
     33 void ipack_bus_init(IPackBus *bus, size_t bus_size,
     34                     DeviceState *parent,
     35                     uint8_t n_slots,
     36                     qemu_irq_handler handler)
     37 {
     38     qbus_init(bus, bus_size, TYPE_IPACK_BUS, parent, NULL);
     39     bus->n_slots = n_slots;
     40     bus->set_irq = handler;
     41 }
     42 
     43 static void ipack_device_realize(DeviceState *dev, Error **errp)
     44 {
     45     IPackDevice *idev = IPACK_DEVICE(dev);
     46     IPackBus *bus = IPACK_BUS(qdev_get_parent_bus(dev));
     47     IPackDeviceClass *k = IPACK_DEVICE_GET_CLASS(dev);
     48 
     49     if (idev->slot < 0) {
     50         idev->slot = bus->free_slot;
     51     }
     52     if (idev->slot >= bus->n_slots) {
     53         error_setg(errp, "Only %" PRIu8 " slots available.", bus->n_slots);
     54         return;
     55     }
     56     bus->free_slot = idev->slot + 1;
     57 
     58     idev->irq = qemu_allocate_irqs(bus->set_irq, idev, 2);
     59 
     60     k->realize(dev, errp);
     61 }
     62 
     63 static void ipack_device_unrealize(DeviceState *dev)
     64 {
     65     IPackDevice *idev = IPACK_DEVICE(dev);
     66     IPackDeviceClass *k = IPACK_DEVICE_GET_CLASS(dev);
     67 
     68     if (k->unrealize) {
     69         k->unrealize(dev);
     70         return;
     71     }
     72 
     73     qemu_free_irqs(idev->irq, 2);
     74 }
     75 
     76 static Property ipack_device_props[] = {
     77     DEFINE_PROP_INT32("slot", IPackDevice, slot, -1),
     78     DEFINE_PROP_END_OF_LIST()
     79 };
     80 
     81 static void ipack_device_class_init(ObjectClass *klass, void *data)
     82 {
     83     DeviceClass *k = DEVICE_CLASS(klass);
     84 
     85     set_bit(DEVICE_CATEGORY_INPUT, k->categories);
     86     k->bus_type = TYPE_IPACK_BUS;
     87     k->realize = ipack_device_realize;
     88     k->unrealize = ipack_device_unrealize;
     89     device_class_set_props(k, ipack_device_props);
     90 }
     91 
     92 const VMStateDescription vmstate_ipack_device = {
     93     .name = "ipack_device",
     94     .version_id = 1,
     95     .minimum_version_id = 1,
     96     .fields = (VMStateField[]) {
     97         VMSTATE_INT32(slot, IPackDevice),
     98         VMSTATE_END_OF_LIST()
     99     }
    100 };
    101 
    102 static const TypeInfo ipack_device_info = {
    103     .name          = TYPE_IPACK_DEVICE,
    104     .parent        = TYPE_DEVICE,
    105     .instance_size = sizeof(IPackDevice),
    106     .class_size    = sizeof(IPackDeviceClass),
    107     .class_init    = ipack_device_class_init,
    108     .abstract      = true,
    109 };
    110 
    111 static const TypeInfo ipack_bus_info = {
    112     .name = TYPE_IPACK_BUS,
    113     .parent = TYPE_BUS,
    114     .instance_size = sizeof(IPackBus),
    115 };
    116 
    117 static void ipack_register_types(void)
    118 {
    119     type_register_static(&ipack_device_info);
    120     type_register_static(&ipack_bus_info);
    121 }
    122 
    123 type_init(ipack_register_types)