com32/gplinclude/memory.h

   1 /* ----------------------------------------------------------------------- *
   2  *
   3  *   Copyright 2009 Pierre-Alexandre Meyer
   4  *
   5  *   Some parts borrowed from meminfo.c32:
   6  *
   7  *   Copyright 2003-2009 H. Peter Anvin - All Rights Reserved
   8  *   Copyright 2009 Intel Corporation; author: H. Peter Anvin
   9  *
  10  *   Some parts borrowed from Linux:
  11  *
  12  *   Copyright (C) 1991, 1992 Linus Torvalds
  13  *   Copyright 2007 rPath, Inc. - All Rights Reserved
  14  *   Copyright 2009 Intel Corporation; author H. Peter Anvin
  15  *
  16  *   This file is part of Syslinux, and is made available under
  17  *   the terms of the GNU General Public License version 2.
  18  *
  19  * ----------------------------------------------------------------------- */
  20
  21 #ifndef _MEMORY_H_
  22 #define _MEMORY_H_
  23 #include <stdint.h>
  24
  25 #define E820MAX 128
  26 #define E820_RAM        1
  27 #define E820_RESERVED   2
  28 #define E820_ACPI       3       /* usable as RAM once ACPI tables have been read */
  29 #define E820_NVS        4
  30
  31 #define RES_START       0xa0000
  32 #define RES_END         0x100000
  33
  34 struct e820entry {
  35     uint64_t addr;              /* start of memory segment */
  36     uint64_t size;              /* size of memory segment */
  37     uint64_t type;              /* type of memory segment */
  38 } __attribute__ ((packed));
  39
  40 const char *const e820_types[5];
  41
  42 void get_type(int, char *, int);
  43 void detect_memory_e820(struct e820entry *desc, int size_map, int *size_found);
  44 int detect_memory_e801(int *, int *);
  45 int detect_memory_88(int *);
  46
  47 /* The following stuff could be merge once the addr_t will be set to 64bits.
  48  * syslinux_scan_memory can be used for that purpose */
  49 unsigned long memsize_e820(struct e820entry *e820, int e820_nr);
  50 int sanitize_e820_map(struct e820entry *orig_map, struct e820entry *new_bios,
  51                       short old_nr);
  52 unsigned long detect_memsize(void);
  53 #endif