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dev_flash.c revision 1.5 
      1 /* $NetBSD: dev_flash.c,v 1.5 2009/10/26 19:16:55 cegger Exp $ */
      2 
      3 /*
      4  * Copyright (c) 2003 Naoto Shimazaki.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY NAOTO SHIMAZAKI AND CONTRIBUTORS ``AS IS''
     17  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
     18  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE NAOTO OR CONTRIBUTORS BE
     20  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
     26  * THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 #include <sys/cdefs.h>
     29 __KERNEL_RCSID(0, "$NetBSD: dev_flash.c,v 1.5 2009/10/26 19:16:55 cegger Exp $");
     30 
     31 #include <sys/param.h>
     32 #include <lib/libsa/stand.h>
     33 #include <machine/stdarg.h>
     34 
     35 #include "extern.h"
     36 
     37 #define READ_CHUNK	0x10000
     38 
     39 int
     40 flash_strategy(void *devdata, int rw, daddr_t blk,
     41 	       size_t size, void *buf , size_t *rsize)
     42 {
     43 	u_int8_t	*src;
     44 	size_t		count;
     45 
     46 	if (rw != F_READ)
     47 		return EIO;
     48 
     49 	src = (u_int8_t *) KERN_ROMBASE + dbtob(blk);
     50 	count = size < READ_CHUNK ? size : READ_CHUNK;
     51 	memcpy(buf, src, count);
     52 	*rsize = count;
     53         return 0;
     54 }
     55 
     56 int
     57 flash_open(struct open_file *f, ...)
     58 {
     59 	char	*fname;
     60 	char	**file;
     61 	va_list	ap;
     62 
     63 	va_start(ap, f);
     64 	fname = va_arg(ap, char *);
     65 	file = va_arg(ap, char **);
     66 	va_end(ap);
     67 
     68 	*file = NULL;
     69 
     70 	return 0;
     71 }
     72 
     73 int
     74 flash_close(struct open_file *f)
     75 {
     76 	return 0;
     77 }
     78 
     79 int
     80 flash_ioctl(struct open_file *f, u_long cmd, void *data)
     81 {
     82 	return EIO;
     83 }
     84