diff options
Diffstat (limited to 'qemu/include/hw/sysbus.h')
-rw-r--r-- | qemu/include/hw/sysbus.h | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/qemu/include/hw/sysbus.h b/qemu/include/hw/sysbus.h new file mode 100644 index 000000000..cc1dba49b --- /dev/null +++ b/qemu/include/hw/sysbus.h @@ -0,0 +1,121 @@ +#ifndef HW_SYSBUS_H +#define HW_SYSBUS_H 1 + +/* Devices attached directly to the main system bus. */ + +#include "hw/qdev.h" +#include "exec/memory.h" + +#define QDEV_MAX_MMIO 32 +#define QDEV_MAX_PIO 32 + +#define TYPE_SYSTEM_BUS "System" +#define SYSTEM_BUS(obj) OBJECT_CHECK(BusState, (obj), TYPE_SYSTEM_BUS) + +typedef struct SysBusDevice SysBusDevice; + +#define TYPE_SYS_BUS_DEVICE "sys-bus-device" +#define SYS_BUS_DEVICE(obj) \ + OBJECT_CHECK(SysBusDevice, (obj), TYPE_SYS_BUS_DEVICE) +#define SYS_BUS_DEVICE_CLASS(klass) \ + OBJECT_CLASS_CHECK(SysBusDeviceClass, (klass), TYPE_SYS_BUS_DEVICE) +#define SYS_BUS_DEVICE_GET_CLASS(obj) \ + OBJECT_GET_CLASS(SysBusDeviceClass, (obj), TYPE_SYS_BUS_DEVICE) + +/** + * SysBusDeviceClass: + * @init: Callback function invoked when the #DeviceState.realized property + * is changed to %true. Deprecated, new types inheriting directly from + * TYPE_SYS_BUS_DEVICE should use #DeviceClass.realize instead, new leaf + * types should consult their respective parent type. + * + * SysBusDeviceClass is not overriding #DeviceClass.realize, so derived + * classes overriding it are not required to invoke its implementation. + */ + +#define SYSBUS_DEVICE_GPIO_IRQ "sysbus-irq" + +typedef struct SysBusDeviceClass { + /*< private >*/ + DeviceClass parent_class; + /*< public >*/ + + int (*init)(SysBusDevice *dev); + + /* + * Let the sysbus device format its own non-PIO, non-MMIO unit address. + * + * Sometimes a class of SysBusDevices has neither MMIO nor PIO resources, + * yet instances of it would like to distinguish themselves, in + * OpenFirmware device paths, from other instances of the same class on the + * sysbus. For that end we expose this callback. + * + * The implementation is not supposed to change *@dev, or incur other + * observable change. + * + * The function returns a dynamically allocated string. On error, NULL + * should be returned; the unit address portion of the OFW node will be + * omitted then. (This is not considered a fatal error.) + */ + char *(*explicit_ofw_unit_address)(const SysBusDevice *dev); + void (*connect_irq_notifier)(SysBusDevice *dev, qemu_irq irq); +} SysBusDeviceClass; + +struct SysBusDevice { + /*< private >*/ + DeviceState parent_obj; + /*< public >*/ + + int num_mmio; + struct { + hwaddr addr; + MemoryRegion *memory; + } mmio[QDEV_MAX_MMIO]; + int num_pio; + pio_addr_t pio[QDEV_MAX_PIO]; +}; + +typedef int FindSysbusDeviceFunc(SysBusDevice *sbdev, void *opaque); + +void sysbus_init_mmio(SysBusDevice *dev, MemoryRegion *memory); +MemoryRegion *sysbus_mmio_get_region(SysBusDevice *dev, int n); +void sysbus_init_irq(SysBusDevice *dev, qemu_irq *p); +void sysbus_pass_irq(SysBusDevice *dev, SysBusDevice *target); +void sysbus_init_ioports(SysBusDevice *dev, pio_addr_t ioport, pio_addr_t size); + + +bool sysbus_has_irq(SysBusDevice *dev, int n); +bool sysbus_has_mmio(SysBusDevice *dev, unsigned int n); +void sysbus_connect_irq(SysBusDevice *dev, int n, qemu_irq irq); +bool sysbus_is_irq_connected(SysBusDevice *dev, int n); +qemu_irq sysbus_get_connected_irq(SysBusDevice *dev, int n); +void sysbus_mmio_map(SysBusDevice *dev, int n, hwaddr addr); +void sysbus_mmio_map_overlap(SysBusDevice *dev, int n, hwaddr addr, + int priority); +void sysbus_add_io(SysBusDevice *dev, hwaddr addr, + MemoryRegion *mem); +MemoryRegion *sysbus_address_space(SysBusDevice *dev); + +/* Call func for every dynamically created sysbus device in the system */ +void foreach_dynamic_sysbus_device(FindSysbusDeviceFunc *func, void *opaque); + +/* Legacy helper function for creating devices. */ +DeviceState *sysbus_create_varargs(const char *name, + hwaddr addr, ...); +DeviceState *sysbus_try_create_varargs(const char *name, + hwaddr addr, ...); +static inline DeviceState *sysbus_create_simple(const char *name, + hwaddr addr, + qemu_irq irq) +{ + return sysbus_create_varargs(name, addr, irq, NULL); +} + +static inline DeviceState *sysbus_try_create_simple(const char *name, + hwaddr addr, + qemu_irq irq) +{ + return sysbus_try_create_varargs(name, addr, irq, NULL); +} + +#endif /* !HW_SYSBUS_H */ |