/*      $OpenBSD: devs.c,v 1.13 2023/02/23 19:48:22 miod Exp $  */

/*
 * Copyright (c) 2006 Michael Shalayeff
 * All rights reserved.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER IN
 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <sys/param.h>
#include <libsa.h>
#include <lib/libsa/loadfile.h>

int sector;

void
machdep(void)
{
        tick_init();
        cninit();
}

int
devopen(struct open_file *f, const char *fname, char **file)
{  
        if (fname[0] != 'c' || fname[1] != 'f' || fname[2] != ':')
                return EINVAL;

        *file = (char *)fname + 3;
        f->f_flags |= F_NODEV;
        f->f_dev = &devsw[0];
        return (0);
}

void
devboot(dev_t bootdev, char *p)
{
        sector = bootdev;       /* passed from pbr */
        p[0] = 'c';
        p[1] = 'f';
        p[2] = '\0';
}

void
run_loadfile(uint64_t *marks, int howto)
{
        u_long entry;

        entry = marks[MARK_ENTRY];
        cache_flush();
        cache_disable();

        (*(void (*)(int,int,int))entry)(howto, marks[MARK_END], 0);
}

int
blkdevopen(struct open_file *f, ...)
{
        return 0;
}

int
blkdevstrategy(void *v, int flag, daddr_t dblk, size_t size, void *buf, size_t *rsize)
{

        if (flag != F_READ)
                return EROFS;

        if (size & (DEV_BSIZE - 1))
                return EINVAL;

        if (rsize)
                *rsize = size;

        if (size != 0 && readsects(0x40, sector + dblk, buf,
            size / DEV_BSIZE) != 0)
                return EIO;

        return 0;
}

int
blkdevclose(struct open_file *f)
{
        return 0;
}