openblt

a hobby OS from the late 90s
git clone http://frotz.net/git/openblt.git
Log | Files | Refs | LICENSE

blkdev.c (2175B)


      1 /* $Id: //depot/blt/srv/ide/blkdev.c#2 $
      2 **
      3 ** Copyright 1999 Sidney Cammeresi
      4 ** All rights reserved.
      5 **
      6 ** Redistribution and use in source and binary forms, with or without
      7 ** modification, are permitted provided that the following conditions
      8 ** are met:
      9 ** 1. Redistributions of source code must retain the above copyright
     10 **    notice, this list of conditions, and the following disclaimer.
     11 ** 2. Redistributions in binary form must reproduce the above copyright
     12 **    notice, this list of conditions, and the following disclaimer in the
     13 **    documentation and/or other materials provided with the distribution.
     14 ** 3. The name of the author may not be used to endorse or promote products
     15 **    derived from this software without specific prior written permission.
     16 **
     17 ** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     18 ** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     19 ** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     20 ** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     21 ** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     22 ** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25 ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     26 ** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27 */
     28 
     29 #include <stdlib.h>
     30 #include <blt/blkdev.h>
     31 #include "ide-int.h"
     32 
     33 int blk_open (const char *name, int flags, blkdev_t **retdev)
     34 {
     35 	blkdev_t *dev;
     36 
     37 	dev = malloc (sizeof (blkdev_t));
     38 	dev->blksize = 512;
     39 	dev->devno = (name[4] - '0') * 2 + (name[6] - '0');
     40 	*retdev = dev;
     41 	return 0;
     42 }
     43 
     44 int blk_close (blkdev_t *dev)
     45 {
     46 	free (dev);
     47 	return 0;
     48 }
     49 
     50 int blk_read (blkdev_t *dev, void *buf, int block, int count)
     51 {
     52 	int i;
     53 
     54 	for (i = 0; i < count; i++)
     55 		ide_dev[dev->devno]->read ((dev->devno & 0xff) / 2, dev->devno % 2,
     56 			(char *) buf + dev->blksize * i, block + i);
     57 	return 0;
     58 }
     59 
     60 int blk_write (blkdev_t *dev, const void *buf, int block, int count)
     61 {
     62 	return 0;
     63 }
     64