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  1. /*
  2.  * Copyright (c) 2005 Josef Cejka
  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 ia32
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #ifndef KERN_ia32_MEMMAP_H_
  36. #define KERN_ia32_MEMMAP_H_
  37.  
  38. /* E820h memory range types */
  39.  
  40. /* Free memory */
  41. #define MEMMAP_MEMORY_AVAILABLE  1
  42.  
  43. /* Not available for OS */
  44. #define MEMMAP_MEMORY_RESERVED   2
  45.  
  46. /* OS may use it after reading ACPI table */
  47. #define MEMMAP_MEMORY_ACPI       3
  48.  
  49. /* Unusable, required to be saved and restored across an NVS sleep */
  50. #define MEMMAP_MEMORY_NVS        4
  51.  
  52. /* Corrupted memory */
  53. #define MEMMAP_MEMORY_UNUSABLE   5
  54.  
  55. /* Size of one entry */
  56. #define MEMMAP_E820_RECORD_SIZE  20
  57.  
  58. /* Maximum entries */
  59. #define MEMMAP_E820_MAX_RECORDS  32
  60.  
  61. #ifndef __ASM__
  62.  
  63. #include <arch/types.h>
  64.  
  65. typedef struct {
  66.     uint64_t base_address;
  67.     uint64_t size;
  68.     uint32_t type;
  69. } __attribute__ ((packed)) e820memmap_t;
  70.  
  71. extern e820memmap_t e820table[MEMMAP_E820_MAX_RECORDS];
  72. extern uint8_t e820counter;
  73.  
  74. #endif
  75.  
  76. #endif
  77.  
  78. /** @}
  79.  */
  80.