ifs.h

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// $Id: IFS.h,v 1.3 2003/10/07 21:46:18 idgay Exp $

/*									tab:4
 * "Copyright (c) 2000-2003 The Regents of the University  of California.  
 * All rights reserved.
 *
 * Permission to use, copy, modify, and distribute this software and its
 * documentation for any purpose, without fee, and without written agreement is
 * hereby granted, provided that the above copyright notice, the following
 * two paragraphs and the author appear in all copies of this software.
 * 
 * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
 * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
 * CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * 
 * THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
 * ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS."
 *
 * Copyright (c) 2002-2003 Intel Corporation
 * All rights reserved.
 *
 * This file is distributed under the terms in the attached INTEL-LICENSE     
 * file. If you do not find these files, copies can be found by writing to
 * Intel Research Berkeley, 2150 Shattuck Avenue, Suite 1300, Berkeley, CA, 
 * 94704.  Attention:  Intel License Inquiry.
 */
#include "PageEEPROM.h"
#include "Matchbox.h"

// internal constants, types for filing system
enum {
  IFS_PAGE_SIZE = 256,
  IFS_LOG2_PAGE_SIZE = 8,
  IFS_FULL_PAGE_SIZE = 264,

  IFS_FIRST_PAGE = 0,
  IFS_NUM_PAGES = 1536
};

typedef eeprompage_t fileblock_t;
typedef eeprompageoffset_t fileblockoffset_t; /* 0 to IFS_PAGE_SIZE */
typedef uint8_t fileblockfoo_t; /* 0 to IFS_PAGE_SIZE - 1 */
typedef uint32_t filemeta_t;	/* Metadata version number */

struct fileEntry {
  char name[14];
  fileblock_t firstBlock;
};

enum {
  IFS_OFFSET_METADATA = 258,
  IFS_EOF_BLOCK = IFS_NUM_PAGES + 42,
  IFS_ROOT_MARKER = 4,
  IFS_ROOT_MARKER_BITS = 3
};

enum {
  IFS_RFD_META = unique("FileRead"),
  IFS_WFD_META = unique("FileWrite")
};