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
87 bool sysbus_realize(SysBusDevice *dev, Error **errp);
88 bool sysbus_realize_and_unref(SysBusDevice *dev, Error **errp);
89
90 /* Call func for every dynamically created sysbus device in the system */
91 void foreach_dynamic_sysbus_device(FindSysbusDeviceFunc *func, void *opaque);
92
93 /* Legacy helper function for creating devices. */
94 DeviceState *sysbus_create_varargs(const char *name,
95 hwaddr addr, ...);
96
sysbus_create_simple(const char * name,hwaddr addr,qemu_irq irq)97 static inline DeviceState *sysbus_create_simple(const char *name,
98 hwaddr addr,
99 qemu_irq irq)
100 {
101 return sysbus_create_varargs(name, addr, irq, NULL);
102 }
103
104 #endif /* HW_SYSBUS_H */
105