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 typedef struct SysBusDevice SysBusDevice; 18 19 #define TYPE_SYS_BUS_DEVICE "sys-bus-device" 20 typedef struct SysBusDeviceClass SysBusDeviceClass; 21 DECLARE_OBJ_CHECKERS(SysBusDevice, SysBusDeviceClass, 22 SYS_BUS_DEVICE, TYPE_SYS_BUS_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 void (*connect_irq_notifier)(SysBusDevice *dev, qemu_irq irq); 54 }; 55 56 struct SysBusDevice { 57 /*< private >*/ 58 DeviceState parent_obj; 59 /*< public >*/ 60 61 int num_mmio; 62 struct { 63 hwaddr addr; 64 MemoryRegion *memory; 65 } mmio[QDEV_MAX_MMIO]; 66 int num_pio; 67 uint32_t pio[QDEV_MAX_PIO]; 68 }; 69 70 typedef void FindSysbusDeviceFunc(SysBusDevice *sbdev, void *opaque); 71 72 void sysbus_init_mmio(SysBusDevice *dev, MemoryRegion *memory); 73 MemoryRegion *sysbus_mmio_get_region(SysBusDevice *dev, int n); 74 void sysbus_init_irq(SysBusDevice *dev, qemu_irq *p); 75 void sysbus_pass_irq(SysBusDevice *dev, SysBusDevice *target); 76 void sysbus_init_ioports(SysBusDevice *dev, uint32_t ioport, uint32_t size); 77 78 79 bool sysbus_has_irq(SysBusDevice *dev, int n); 80 bool sysbus_has_mmio(SysBusDevice *dev, unsigned int n); 81 void sysbus_connect_irq(SysBusDevice *dev, int n, qemu_irq irq); 82 bool sysbus_is_irq_connected(SysBusDevice *dev, int n); 83 qemu_irq sysbus_get_connected_irq(SysBusDevice *dev, int n); 84 void sysbus_mmio_map(SysBusDevice *dev, int n, hwaddr addr); 85 void sysbus_mmio_map_overlap(SysBusDevice *dev, int n, hwaddr addr, 86 int priority); 87 void sysbus_mmio_unmap(SysBusDevice *dev, int n); 88 void sysbus_add_io(SysBusDevice *dev, hwaddr addr, 89 MemoryRegion *mem); 90 MemoryRegion *sysbus_address_space(SysBusDevice *dev); 91 92 bool sysbus_realize(SysBusDevice *dev, Error **errp); 93 bool sysbus_realize_and_unref(SysBusDevice *dev, Error **errp); 94 95 /* Call func for every dynamically created sysbus device in the system */ 96 void foreach_dynamic_sysbus_device(FindSysbusDeviceFunc *func, void *opaque); 97 98 /* Legacy helper function for creating devices. */ 99 DeviceState *sysbus_create_varargs(const char *name, 100 hwaddr addr, ...); 101 102 static inline DeviceState *sysbus_create_simple(const char *name, 103 hwaddr addr, 104 qemu_irq irq) 105 { 106 return sysbus_create_varargs(name, addr, irq, NULL); 107 } 108 109 #endif /* HW_SYSBUS_H */ 110