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1 #ifndef HW_SYSBUS_H
2 #define HW_SYSBUS_H
3
4 /* Devices attached directly to the main system bus. */
5
6 #include "hw/core/qdev.h"
7 #include "system/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 #define TYPE_DYNAMIC_SYS_BUS_DEVICE "dynamic-sysbus-device"
23
24 /**
25 * SysBusDeviceClass:
26 *
27 * SysBusDeviceClass is not overriding #DeviceClass.realize, so derived
28 * classes overriding it are not required to invoke its implementation.
29 */
30
31 #define SYSBUS_DEVICE_GPIO_IRQ "sysbus-irq"
32
33 struct SysBusDeviceClass {
34 /*< private >*/
35 DeviceClass parent_class;
36
37 /*
38 * Let the sysbus device format its own non-PIO, non-MMIO unit address.
39 *
40 * Sometimes a class of SysBusDevices has neither MMIO nor PIO resources,
41 * yet instances of it would like to distinguish themselves, in
42 * OpenFirmware device paths, from other instances of the same class on the
43 * sysbus. For that end we expose this callback.
44 *
45 * The implementation is not supposed to change *@dev, or incur other
46 * observable change.
47 *
48 * The function returns a dynamically allocated string. On error, NULL
49 * should be returned; the unit address portion of the OFW node will be
50 * omitted then. (This is not considered a fatal error.)
51 */
52 char *(*explicit_ofw_unit_address)(const SysBusDevice *dev);
53 };
54
55 struct SysBusDevice {
56 /*< private >*/
57 DeviceState parent_obj;
58 /*< public >*/
59
60 int num_mmio;
61 struct {
62 hwaddr addr;
63 MemoryRegion *memory;
64 } mmio[QDEV_MAX_MMIO];
65 int num_pio;
66 uint32_t pio[QDEV_MAX_PIO];
67 };
68
69 typedef void FindSysbusDeviceFunc(SysBusDevice *sbdev, void *opaque);
70
71 void sysbus_init_mmio(SysBusDevice *dev, MemoryRegion *memory);
72 MemoryRegion *sysbus_mmio_get_region(const SysBusDevice *dev, int n);
73 void sysbus_init_irq(SysBusDevice *dev, qemu_irq *p);
74 void sysbus_pass_irq(SysBusDevice *dev, SysBusDevice *target);
75 void sysbus_init_ioports(SysBusDevice *dev, uint32_t ioport, uint32_t size);
76
77
78 bool sysbus_has_irq(const SysBusDevice *dev, int n);
79 bool sysbus_has_mmio(const SysBusDevice *dev, unsigned int n);
80 void sysbus_connect_irq(SysBusDevice *dev, int n, qemu_irq irq);
81 bool sysbus_is_irq_connected(const SysBusDevice *dev, int n);
82 qemu_irq sysbus_get_connected_irq(const SysBusDevice *dev, int n);
83 void sysbus_mmio_map(SysBusDevice *dev, int n, hwaddr addr);
84 int sysbus_mmio_map_name(SysBusDevice *dev, const char*name, hwaddr addr);
85 void sysbus_mmio_map_overlap(SysBusDevice *dev, int n, hwaddr addr,
86 int priority);
87
88 bool sysbus_realize(SysBusDevice *dev, Error **errp);
89 bool sysbus_realize_and_unref(SysBusDevice *dev, Error **errp);
90
91 /* Call func for every dynamically created sysbus device in the system */
92 void foreach_dynamic_sysbus_device(FindSysbusDeviceFunc *func, void *opaque);
93
94 /* Legacy helper function for creating devices. */
95 DeviceState *sysbus_create_varargs(const char *name,
96 hwaddr addr, ...);
97
98 static inline DeviceState *sysbus_create_simple(const char *name,
99 hwaddr addr,
100 qemu_irq irq)
101 {
102 return sysbus_create_varargs(name, addr, irq, NULL);
103 }
104
105 #endif /* HW_SYSBUS_H */