virtio.h

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#ifndef __VIRTIO_H__
#define __VIRTIO_H__
 
#include <stdint.h>
 
struct VirtioCommonCfg {
    volatile uint32_t DevFeatureSelect;
    volatile uint32_t DevFeature;
    volatile uint32_t GuestFeatureSelect;
    volatile uint32_t GuestFeature;
    volatile uint16_t MSix;
    volatile uint16_t Queues;
    volatile uint8_t  DeviceStatus;
    volatile uint8_t  ConfigGeneration;
 
    volatile uint16_t QueueSelect;
    volatile uint16_t QueueSize;
    volatile uint16_t QueueMSixVector;
    volatile uint16_t QueueEnable;
    volatile uint16_t QueueNotifyOff;
 
    volatile uint64_t QueueDesc;
    volatile uint64_t QueueAvail;
    volatile uint64_t QueueUsed;
};
 
struct VirtioDeviceConfig {
    volatile uint8_t select;
    volatile uint8_t subsel;
    volatile uint8_t size;
    volatile uint8_t pad[5];
    union {
        struct {
            volatile uint32_t min;
            volatile uint32_t max;
            volatile uint32_t fuzz;
            volatile uint32_t flat;
            volatile uint32_t res;
        }tablet_data;
        uint8_t str[128];
    }data;
};
#pragma pack(push,1)
struct VirtioBuffer {
    uint64_t Addr;
    uint32_t Length;
    uint16_t Flags;
    uint16_t Next;
};
 
struct VirtioAvail {
    uint16_t flags;
    volatile uint16_t index;
    uint16_t ring[64];
    uint16_t int_index;
};
 
struct VirtioRing {
    uint32_t index;
    uint32_t length;
};
 
struct VirtioUsed {
    uint16_t flags;
    volatile uint16_t index;
    struct VirtioRing ring[64];
    uint16_t int_index;
};
 
struct VirtioQueue {
    struct VirtioBuffer buffers[64];
    struct VirtioAvail available;
    struct VirtioUsed used;
};
 
struct VirtioInputEvent {
    uint16_t type;
    uint16_t code;
    uint32_t value;
};
#pragma pack(pop)
 
#define OFFSETOF(s,m) ((size_t)&(((s*)0)->m))
 
/*
 * AuVirtioKbdInitialize -- initialize the virtio keyboard
 */
extern void AuVirtioKbdInitialize(uint64_t device);
 
/*
 * AuVirtioTabletInitialize -- initialize virtio tablet
 */
extern void AuVirtioTabletInitialize(uint64_t device);
#endif