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      1 /*
      2  * Copyright (C) 2008 The Android Open Source Project
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  *  * Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  *  * Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in
     12  *    the documentation and/or other materials provided with the
     13  *    distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     16  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     17  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
     18  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
     19  * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
     22  * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     24  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
     25  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #ifndef _INCLUDE_BOOT_FLASH_H_
     30 #define _INCLUDE_BOOT_FLASH_H_
     31 
     32 typedef struct flash_ops flash_ops;
     33 typedef struct ptentry ptentry;
     34 
     35 /* flash partitions are defined in terms of blocks
     36 ** (flash erase units)
     37 */
     38 struct ptentry
     39 {
     40     char name[16];
     41     unsigned start;
     42     unsigned length;
     43     unsigned flags;
     44 };
     45 
     46 /* tools to populate and query the partition table */
     47 void flash_add_ptn(ptentry *ptn);
     48 ptentry *flash_find_ptn(const char *name);
     49 ptentry *flash_get_ptn(unsigned n);
     50 unsigned flash_get_ptn_count(void);
     51 void flash_dump_ptn(void);
     52 
     53 int flash_init(void);
     54 int flash_erase(ptentry *ptn);
     55 int flash_read_ext(ptentry *ptn, unsigned extra_per_page, unsigned offset,
     56                void *data, unsigned bytes);
     57 #define flash_read(ptn, offset, data, bytes) flash_read_ext(ptn, 0, offset, data, bytes)
     58 int flash_write(ptentry *ptn, unsigned extra_per_page,
     59                 const void *data, unsigned bytes);
     60 #endif
     61