include/vdev.h

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#ifndef __VDEV_H_
#define __VDEV_H_

#include <context.h>
#include <hvmm_types.h>

typedef enum {
    VDEV_ACCESS_BYTE = 0,
    VDEV_ACCESS_HWORD = 1,
    VDEV_ACCESS_WORD = 2,
    VDEV_ACCESS_RESERVED = 3
} vdev_access_size_t;

/*
 * @write   0: read, 1: write
 * @offset  offset in bytes from base address
 * @pvalue  address to input value (if write) or output value (if read)
 * return: HVMM_STATUS_SUCCESS if successful, failed otherwise
 */
typedef hvmm_status_t (* vdev_callback_t)(uint32_t wnr, uint32_t offset, uint32_t *pvalue, vdev_access_size_t access_size);

typedef struct {
    char *name;
    unsigned int base;
    unsigned int size;
    vdev_callback_t handler;
} vdev_info_t;

void vdev_init(void);
int register_vdev(void);
hvmm_status_t vdev_reg_device(vdev_info_t *new_vdev);
hvmm_status_t vdev_emulate(uint32_t fipa, uint32_t wnr, vdev_access_size_t access_size, uint32_t srt, struct arch_regs *regs);

#endif //__VDEV_H_