include/hw/sysbus.h

   1 #ifndef HW_SYSBUS_H
   2 #define HW_SYSBUS_H 1
   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     /*< public >*/
  42
  43     int (*init)(SysBusDevice *dev);
  44
  45     /*
  46      * Let the sysbus device format its own non-PIO, non-MMIO unit address.
  47      *
  48      * Sometimes a class of SysBusDevices has neither MMIO nor PIO resources,
  49      * yet instances of it would like to distinguish themselves, in
  50      * OpenFirmware device paths, from other instances of the same class on the
  51      * sysbus. For that end we expose this callback.
  52      *
  53      * The implementation is not supposed to change *@dev, or incur other
  54      * observable change.
  55      *
  56      * The function returns a dynamically allocated string. On error, NULL
  57      * should be returned; the unit address portion of the OFW node will be
  58      * omitted then. (This is not considered a fatal error.)
  59      */
  60     char *(*explicit_ofw_unit_address)(const SysBusDevice *dev);
  61     void (*connect_irq_notifier)(SysBusDevice *dev, qemu_irq irq);
  62 } SysBusDeviceClass;
  63
  64 struct SysBusDevice {
  65     /*< private >*/
  66     DeviceState parent_obj;
  67     /*< public >*/
  68
  69     int num_mmio;
  70     struct {
  71         hwaddr addr;
  72         MemoryRegion *memory;
  73     } mmio[QDEV_MAX_MMIO];
  74     int num_pio;
  75     uint32_t pio[QDEV_MAX_PIO];
  76 };
  77
  78 typedef int FindSysbusDeviceFunc(SysBusDevice *sbdev, void *opaque);
  79
  80 void sysbus_init_mmio(SysBusDevice *dev, MemoryRegion *memory);
  81 MemoryRegion *sysbus_mmio_get_region(SysBusDevice *dev, int n);
  82 void sysbus_init_irq(SysBusDevice *dev, qemu_irq *p);
  83 void sysbus_pass_irq(SysBusDevice *dev, SysBusDevice *target);
  84 void sysbus_init_ioports(SysBusDevice *dev, uint32_t ioport, uint32_t size);
  85
  86
  87 bool sysbus_has_irq(SysBusDevice *dev, int n);
  88 bool sysbus_has_mmio(SysBusDevice *dev, unsigned int n);
  89 void sysbus_connect_irq(SysBusDevice *dev, int n, qemu_irq irq);
  90 bool sysbus_is_irq_connected(SysBusDevice *dev, int n);
  91 qemu_irq sysbus_get_connected_irq(SysBusDevice *dev, int n);
  92 void sysbus_mmio_map(SysBusDevice *dev, int n, hwaddr addr);
  93 void sysbus_mmio_map_overlap(SysBusDevice *dev, int n, hwaddr addr,
  94                              int priority);
  95 void sysbus_add_io(SysBusDevice *dev, hwaddr addr,
  96                    MemoryRegion *mem);
  97 MemoryRegion *sysbus_address_space(SysBusDevice *dev);
  98
  99 /* Call func for every dynamically created sysbus device in the system */
 100 void foreach_dynamic_sysbus_device(FindSysbusDeviceFunc *func, void *opaque);
 101
 102 /* Legacy helper function for creating devices.  */
 103 DeviceState *sysbus_create_varargs(const char *name,
 104                                  hwaddr addr, ...);
 105 DeviceState *sysbus_try_create_varargs(const char *name,
 106                                        hwaddr addr, ...);
 107 static inline DeviceState *sysbus_create_simple(const char *name,
 108                                               hwaddr addr,
 109                                               qemu_irq irq)
 110 {
 111     return sysbus_create_varargs(name, addr, irq, NULL);
 112 }
 113
 114 static inline DeviceState *sysbus_try_create_simple(const char *name,
 115                                                     hwaddr addr,
 116                                                     qemu_irq irq)
 117 {
 118     return sysbus_try_create_varargs(name, addr, irq, NULL);
 119 }
 120
 121 #endif /* !HW_SYSBUS_H */