qemu

FORK: QEMU emulator
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sysbus.h (3628B)

      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-core.h"
      7 #include "exec/memory.h"
      8 #include "qom/object.h"
      9 
     10 #define QDEV_MAX_MMIO 32
     11 #define QDEV_MAX_PIO 32
     12 
     13 #define TYPE_SYSTEM_BUS "System"
     14 DECLARE_INSTANCE_CHECKER(BusState, SYSTEM_BUS,
     15                          TYPE_SYSTEM_BUS)
     16 
     17 
     18 #define TYPE_SYS_BUS_DEVICE "sys-bus-device"
     19 OBJECT_DECLARE_TYPE(SysBusDevice, SysBusDeviceClass,
     20                     SYS_BUS_DEVICE)
     21 
     22 /**
     23  * SysBusDeviceClass:
     24  *
     25  * SysBusDeviceClass is not overriding #DeviceClass.realize, so derived
     26  * classes overriding it are not required to invoke its implementation.
     27  */
     28 
     29 #define SYSBUS_DEVICE_GPIO_IRQ "sysbus-irq"
     30 
     31 struct SysBusDeviceClass {
     32     /*< private >*/
     33     DeviceClass parent_class;
     34 
     35     /*
     36      * Let the sysbus device format its own non-PIO, non-MMIO unit address.
     37      *
     38      * Sometimes a class of SysBusDevices has neither MMIO nor PIO resources,
     39      * yet instances of it would like to distinguish themselves, in
     40      * OpenFirmware device paths, from other instances of the same class on the
     41      * sysbus. For that end we expose this callback.
     42      *
     43      * The implementation is not supposed to change *@dev, or incur other
     44      * observable change.
     45      *
     46      * The function returns a dynamically allocated string. On error, NULL
     47      * should be returned; the unit address portion of the OFW node will be
     48      * omitted then. (This is not considered a fatal error.)
     49      */
     50     char *(*explicit_ofw_unit_address)(const SysBusDevice *dev);
     51     void (*connect_irq_notifier)(SysBusDevice *dev, qemu_irq irq);
     52 };
     53 
     54 struct SysBusDevice {
     55     /*< private >*/
     56     DeviceState parent_obj;
     57     /*< public >*/
     58 
     59     int num_mmio;
     60     struct {
     61         hwaddr addr;
     62         MemoryRegion *memory;
     63     } mmio[QDEV_MAX_MMIO];
     64     int num_pio;
     65     uint32_t pio[QDEV_MAX_PIO];
     66 };
     67 
     68 typedef void FindSysbusDeviceFunc(SysBusDevice *sbdev, void *opaque);
     69 
     70 void sysbus_init_mmio(SysBusDevice *dev, MemoryRegion *memory);
     71 MemoryRegion *sysbus_mmio_get_region(SysBusDevice *dev, int n);
     72 void sysbus_init_irq(SysBusDevice *dev, qemu_irq *p);
     73 void sysbus_pass_irq(SysBusDevice *dev, SysBusDevice *target);
     74 void sysbus_init_ioports(SysBusDevice *dev, uint32_t ioport, uint32_t size);
     75 
     76 
     77 bool sysbus_has_irq(SysBusDevice *dev, int n);
     78 bool sysbus_has_mmio(SysBusDevice *dev, unsigned int n);
     79 void sysbus_connect_irq(SysBusDevice *dev, int n, qemu_irq irq);
     80 bool sysbus_is_irq_connected(SysBusDevice *dev, int n);
     81 qemu_irq sysbus_get_connected_irq(SysBusDevice *dev, int n);
     82 void sysbus_mmio_map(SysBusDevice *dev, int n, hwaddr addr);
     83 void sysbus_mmio_map_overlap(SysBusDevice *dev, int n, hwaddr addr,
     84                              int priority);
     85 void sysbus_mmio_unmap(SysBusDevice *dev, int n);
     86 void sysbus_add_io(SysBusDevice *dev, hwaddr addr,
     87                    MemoryRegion *mem);
     88 MemoryRegion *sysbus_address_space(SysBusDevice *dev);
     89 
     90 bool sysbus_realize(SysBusDevice *dev, Error **errp);
     91 bool sysbus_realize_and_unref(SysBusDevice *dev, Error **errp);
     92 
     93 /* Call func for every dynamically created sysbus device in the system */
     94 void foreach_dynamic_sysbus_device(FindSysbusDeviceFunc *func, void *opaque);
     95 
     96 /* Legacy helper function for creating devices.  */
     97 DeviceState *sysbus_create_varargs(const char *name,
     98                                  hwaddr addr, ...);
     99 
    100 static inline DeviceState *sysbus_create_simple(const char *name,
    101                                               hwaddr addr,
    102                                               qemu_irq irq)
    103 {
    104     return sysbus_create_varargs(name, addr, irq, NULL);
    105 }
    106 
    107 #endif /* HW_SYSBUS_H */