kvisc/vm/pc/device.h

// The OS/K Team licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

#include <pc/arch.h>

#define DEVLEN      32
#define DEVSLOTS    4096

typedef long (*devfn_t)(ctx_t *, dev_t *);

enum
{
    DEVPWOF,    // Power off
    DEVPLUG,    // Unplugged or plugging
    DEVGOOD,    // Plugged and working
    DEVFERR,    // Fatal error
};

struct dev_t
{
    dev_t      *next;

    char        type[DEVLEN];
    char        name[DEVLEN];
    char        modl[DEVLEN]; 
    char        vend[DEVLEN];

    int         major;
    int         minor;
    int         revis;
    ulong       feats;

    long        id;
    uint        state;
    void       *data;

    devfn_t     fpwon;
    devfn_t     fpwoff;

    devfn_t     fplug;
    devfn_t     funplug;

    devfn_t     fslots[DEVSLOTS];
};

dev_t *devalloc(void);
void devfree(dev_t *);

dev_t *devget(ctx_t *, int);

void devattach(ctx_t *, dev_t *);
void devdetach(ctx_t *, dev_t *);

int devinit(ctx_t *, dev_t *);
int devfini(ctx_t *, dev_t *);

int devinitall(ctx_t *);
int devfiniall(ctx_t *);