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