include/hw/sysbus.h

   1 #ifndef HW_SYSBUS_H
   2 #define HW_SYSBUS_H
   3
   4 /* Devices attached directly to the main system bus.  */
   5
   6 #include "hw/qdev.h"
   7 #include "exec/memory.h"
   8
   9 #define QDEV_MAX_MMIO 32
  10 #define QDEV_MAX_PIO 32
  11
  12 #define TYPE_SYSTEM_BUS "System"
  13 #define SYSTEM_BUS(obj) OBJECT_CHECK(BusState, (obj), TYPE_SYSTEM_BUS)
  14
  15 typedef struct SysBusDevice SysBusDevice;
  16
  17 #define TYPE_SYS_BUS_DEVICE "sys-bus-device"
  18 #define SYS_BUS_DEVICE(obj) \
  19      OBJECT_CHECK(SysBusDevice, (obj), TYPE_SYS_BUS_DEVICE)
  20 #define SYS_BUS_DEVICE_CLASS(klass) \
  21      OBJECT_CLASS_CHECK(SysBusDeviceClass, (klass), TYPE_SYS_BUS_DEVICE)
  22 #define SYS_BUS_DEVICE_GET_CLASS(obj) \
  23      OBJECT_GET_CLASS(SysBusDeviceClass, (obj), TYPE_SYS_BUS_DEVICE)
  24
  25 /**
  26  * SysBusDeviceClass:
  27  * @init: Callback function invoked when the #DeviceState.realized property
  28  * is changed to %true. Deprecated, new types inheriting directly from
  29  * TYPE_SYS_BUS_DEVICE should use #DeviceClass.realize instead, new leaf
  30  * types should consult their respective parent type.
  31  *
  32  * SysBusDeviceClass is not overriding #DeviceClass.realize, so derived
  33  * classes overriding it are not required to invoke its implementation.
  34  */
  35
  36 #define SYSBUS_DEVICE_GPIO_IRQ "sysbus-irq"
  37
  38 typedef struct SysBusDeviceClass {
  39     /*< private >*/
  40     DeviceClass parent_class;
  41
  42     /*
  43      * Let the sysbus device format its own non-PIO, non-MMIO unit address.
  44      *
  45      * Sometimes a class of SysBusDevices has neither MMIO nor PIO resources,
  46      * yet instances of it would like to distinguish themselves, in
  47      * OpenFirmware device paths, from other instances of the same class on the
  48      * sysbus. For that end we expose this callback.
  49      *
  50      * The implementation is not supposed to change *@dev, or incur other
  51      * observable change.
  52      *
  53      * The function returns a dynamically allocated string. On error, NULL
  54      * should be returned; the unit address portion of the OFW node will be
  55      * omitted then. (This is not considered a fatal error.)
  56      */
  57     char *(*explicit_ofw_unit_address)(const SysBusDevice *dev);
  58     void (*connect_irq_notifier)(SysBusDevice *dev, qemu_irq irq);
  59 } SysBusDeviceClass;
  60
  61 struct SysBusDevice {
  62     /*< private >*/
  63     DeviceState parent_obj;
  64     /*< public >*/
  65
  66     int num_mmio;
  67     struct {
  68         hwaddr addr;
  69         MemoryRegion *memory;
  70     } mmio[QDEV_MAX_MMIO];
  71     int num_pio;
  72     uint32_t pio[QDEV_MAX_PIO];
  73 };
  74
  75 typedef void FindSysbusDeviceFunc(SysBusDevice *sbdev, void *opaque);
  76
  77 void sysbus_init_mmio(SysBusDevice *dev, MemoryRegion *memory);
  78 MemoryRegion *sysbus_mmio_get_region(SysBusDevice *dev, int n);
  79 void sysbus_init_irq(SysBusDevice *dev, qemu_irq *p);
  80 void sysbus_pass_irq(SysBusDevice *dev, SysBusDevice *target);
  81 void sysbus_init_ioports(SysBusDevice *dev, uint32_t ioport, uint32_t size);
  82
  83
  84 bool sysbus_has_irq(SysBusDevice *dev, int n);
  85 bool sysbus_has_mmio(SysBusDevice *dev, unsigned int n);
  86 void sysbus_connect_irq(SysBusDevice *dev, int n, qemu_irq irq);
  87 bool sysbus_is_irq_connected(SysBusDevice *dev, int n);
  88 qemu_irq sysbus_get_connected_irq(SysBusDevice *dev, int n);
  89 void sysbus_mmio_map(SysBusDevice *dev, int n, hwaddr addr);
  90 void sysbus_mmio_map_overlap(SysBusDevice *dev, int n, hwaddr addr,
  91                              int priority);
  92 void sysbus_mmio_unmap(SysBusDevice *dev, int n);
  93 void sysbus_add_io(SysBusDevice *dev, hwaddr addr,
  94                    MemoryRegion *mem);
  95 MemoryRegion *sysbus_address_space(SysBusDevice *dev);
  96
  97 /**
  98  * sysbus_init_child_obj:
  99  * @parent: The parent object
 100  * @childname: Used as name of the "child<>" property in the parent
 101  * @child: A pointer to the memory to be used for the object.
 102  * @childsize: The maximum size available at @child for the object.
 103  * @childtype: The name of the type of the object to instantiate.
 104  *
 105  * This function will initialize an object and attach it to the main system
 106  * bus. The memory for the object should have already been allocated. The
 107  * object will then be added as child to the given parent. The returned object
 108  * has a reference count of 1 (for the "child<...>" property from the parent),
 109  * so the object will be finalized automatically when the parent gets removed.
 110  */
 111 void sysbus_init_child_obj(Object *parent, const char *childname, void *child,
 112                            size_t childsize, const char *childtype);
 113
 114 /* Call func for every dynamically created sysbus device in the system */
 115 void foreach_dynamic_sysbus_device(FindSysbusDeviceFunc *func, void *opaque);
 116
 117 /* Legacy helper function for creating devices.  */
 118 DeviceState *sysbus_create_varargs(const char *name,
 119                                  hwaddr addr, ...);
 120 DeviceState *sysbus_try_create_varargs(const char *name,
 121                                        hwaddr addr, ...);
 122 static inline DeviceState *sysbus_create_simple(const char *name,
 123                                               hwaddr addr,
 124                                               qemu_irq irq)
 125 {
 126     return sysbus_create_varargs(name, addr, irq, NULL);
 127 }
 128
 129 static inline DeviceState *sysbus_try_create_simple(const char *name,
 130                                                     hwaddr addr,
 131                                                     qemu_irq irq)
 132 {
 133     return sysbus_try_create_varargs(name, addr, irq, NULL);
 134 }
 135
 136 #endif /* HW_SYSBUS_H */