firmware/export/load_code.h

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2010 by Thomas Martitz
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21
  22
  23 #ifndef __LOAD_CODE_H__
  24 #define __LOAD_CODE_H__
  25
  26 #include "config.h"
  27
  28 extern void *lc_open(const char *filename, unsigned char *buf, size_t buf_size);
  29
  30 #if (CONFIG_PLATFORM & PLATFORM_NATIVE)
  31 #include "system.h"
  32
  33 /* header is always at the beginning of the blob, and handle actually points
  34  * to the start of the blob (the header is there) */
  35 static inline void *lc_open_from_mem(void* addr, size_t blob_size)
  36 {
  37     (void)blob_size;
  38     /* commit dcache and discard icache */
  39     commit_discard_idcache();
  40     return addr;
  41 }
  42 static inline void *lc_get_header(void *handle) { return handle; }
  43 /* no need to do anything */
  44 static inline void lc_close(void *handle) { (void)handle; }
  45
  46 #elif (CONFIG_PLATFORM & PLATFORM_HOSTED)
  47
  48 extern void *lc_open_from_mem(void* addr, size_t blob_size);
  49 extern void *lc_get_header(void *handle);
  50 extern void  lc_close(void *handle);
  51
  52 #endif
  53
  54 /* this struct needs to be the first part of other headers
  55  * (lc_open() casts the other header to this one to load to the correct
  56  * address)
  57  */
  58 struct lc_header {
  59     unsigned long magic;
  60     unsigned short target_id;
  61     unsigned short api_version;
  62     unsigned char *load_addr;
  63     unsigned char *end_addr;
  64 };
  65
  66 #endif /* __LOAD_CODE_H__ */