sys/arch/hpcmips/stand/lcboot/dev_flash.c

   1 /* $NetBSD: dev_flash.c,v 1.4 2009/03/18 17:06:44 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 1.4 2009/03/18 17:06:44 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 }