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  1. /*
  2.  * Copyright (C) 2006 Martin Decky
  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.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup genericmm
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #ifndef KERN_RD_H_
  36. #define KERN_RD_H_
  37.  
  38. #include <arch/types.h>
  39. #include <typedefs.h>
  40.  
  41. /**
  42.  * RAM disk version
  43.  */
  44. #define RD_VERSION  0
  45.  
  46. /**
  47.  * RAM disk magic number
  48.  */
  49. #define RD_MAGIC_SIZE   4
  50. #define RD_MAG0         'H'
  51. #define RD_MAG1         'O'
  52. #define RD_MAG2         'R'
  53. #define RD_MAG3         'D'
  54.  
  55. /**
  56.  * RAM disk data encoding types
  57.  */
  58. #define RD_DATA_NONE    0
  59. #define RD_DATA_LSB     1       /* Least significant byte first (little endian) */
  60. #define RD_DATA_MSB     2       /* Most signigicant byte first (big endian) */
  61.  
  62. /**
  63.  * RAM disk error return codes
  64.  */
  65. #define RE_OK           0   /* No error */
  66. #define RE_INVALID      1   /* Invalid RAM disk image */
  67. #define RE_UNSUPPORTED      2   /* Non-supported image (e.g. wrong version) */
  68.  
  69. /** RAM disk header */
  70. typedef struct {
  71.     uint8_t magic[RD_MAGIC_SIZE];
  72.     uint8_t version;
  73.     uint8_t data_type;
  74.     uint32_t header_size;
  75.     uint64_t data_size;
  76. } rd_header;
  77.  
  78. extern int init_rd(rd_header * addr);
  79.  
  80. #endif
  81.  
  82. /** @}
  83.  */
  84.