hw/i386/e820_memory_layout.h

   1 /*
   2  * QEMU BIOS e820 routines
   3  *
   4  * Copyright (c) 2003-2004 Fabrice Bellard
   5  *
   6  * SPDX-License-Identifier: MIT
   7  */
   8
   9 #ifndef HW_I386_E820_MEMORY_LAYOUT_H
  10 #define HW_I386_E820_MEMORY_LAYOUT_H
  11
  12 /* e820 types */
  13 #define E820_RAM        1
  14 #define E820_RESERVED   2
  15 #define E820_ACPI       3
  16 #define E820_NVS        4
  17 #define E820_UNUSABLE   5
  18
  19 #define E820_NR_ENTRIES 16
  20
  21 struct e820_entry {
  22     uint64_t address;
  23     uint64_t length;
  24     uint32_t type;
  25 } QEMU_PACKED __attribute((__aligned__(4)));
  26
  27 struct e820_table {
  28     uint32_t count;
  29     struct e820_entry entry[E820_NR_ENTRIES];
  30 } QEMU_PACKED __attribute((__aligned__(4)));
  31
  32 extern struct e820_table e820_reserve;
  33 extern struct e820_entry *e820_table;
  34
  35 int e820_add_entry(uint64_t address, uint64_t length, uint32_t type);
  36 int e820_get_num_entries(void);
  37 bool e820_get_entry(int index, uint32_t type,
  38                     uint64_t *address, uint64_t *length);
  39
  40
  41
  42 #endif