memory_mapping.h

   1 /*
   2  * QEMU memory mapping
   3  *
   4  * Copyright Fujitsu, Corp. 2011, 2012
   5  *
   6  * Authors:
   7  *     Wen Congyang <wency@cn.fujitsu.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2. See
  10  * the COPYING file in the top-level directory.
  11  *
  12  */
  13
  14 #ifndef MEMORY_MAPPING_H
  15 #define MEMORY_MAPPING_H
  16
  17 #include "qemu-queue.h"
  18
  19 #ifndef CONFIG_USER_ONLY
  20 /* The physical and virtual address in the memory mapping are contiguous. */
  21 typedef struct MemoryMapping {
  22     target_phys_addr_t phys_addr;
  23     target_ulong virt_addr;
  24     ram_addr_t length;
  25     QTAILQ_ENTRY(MemoryMapping) next;
  26 } MemoryMapping;
  27
  28 typedef struct MemoryMappingList {
  29     unsigned int num;
  30     MemoryMapping *last_mapping;
  31     QTAILQ_HEAD(, MemoryMapping) head;
  32 } MemoryMappingList;
  33
  34 /*
  35  * add or merge the memory region [phys_addr, phys_addr + length) into the
  36  * memory mapping's list. The region's virtual address starts with virt_addr,
  37  * and is contiguous. The list is sorted by phys_addr.
  38  */
  39 void memory_mapping_list_add_merge_sorted(MemoryMappingList *list,
  40                                           target_phys_addr_t phys_addr,
  41                                           target_phys_addr_t virt_addr,
  42                                           ram_addr_t length);
  43
  44 void memory_mapping_list_free(MemoryMappingList *list);
  45
  46 void memory_mapping_list_init(MemoryMappingList *list);
  47
  48 /*
  49  * Return value:
  50  *    0: success
  51  *   -1: failed
  52  *   -2: unsupported
  53  */
  54 #if defined(CONFIG_HAVE_GET_MEMORY_MAPPING)
  55 int qemu_get_guest_memory_mapping(MemoryMappingList *list);
  56 #else
  57 static inline int qemu_get_guest_memory_mapping(MemoryMappingList *list)
  58 {
  59     return -2;
  60 }
  61 #endif
  62
  63 #else
  64
  65 /* We use MemoryMappingList* in cpu-all.h */
  66 typedef struct MemoryMappingList MemoryMappingList;
  67 #endif
  68 #endif