include/sysemu/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 or later.
  10  * See 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 #include "qemu/typedefs.h"
  19
  20 typedef struct GuestPhysBlock {
  21     /* visible to guest, reflects PCI hole, etc */
  22     hwaddr target_start;
  23
  24     /* implies size */
  25     hwaddr target_end;
  26
  27     /* points into host memory */
  28     uint8_t *host_addr;
  29
  30     QTAILQ_ENTRY(GuestPhysBlock) next;
  31 } GuestPhysBlock;
  32
  33 /* point-in-time snapshot of guest-visible physical mappings */
  34 typedef struct GuestPhysBlockList {
  35     unsigned num;
  36     QTAILQ_HEAD(GuestPhysBlockHead, GuestPhysBlock) head;
  37 } GuestPhysBlockList;
  38
  39 /* The physical and virtual address in the memory mapping are contiguous. */
  40 typedef struct MemoryMapping {
  41     hwaddr phys_addr;
  42     target_ulong virt_addr;
  43     ram_addr_t length;
  44     QTAILQ_ENTRY(MemoryMapping) next;
  45 } MemoryMapping;
  46
  47 struct MemoryMappingList {
  48     unsigned int num;
  49     MemoryMapping *last_mapping;
  50     QTAILQ_HEAD(, MemoryMapping) head;
  51 };
  52
  53 /*
  54  * add or merge the memory region [phys_addr, phys_addr + length) into the
  55  * memory mapping's list. The region's virtual address starts with virt_addr,
  56  * and is contiguous. The list is sorted by phys_addr.
  57  */
  58 void memory_mapping_list_add_merge_sorted(MemoryMappingList *list,
  59                                           hwaddr phys_addr,
  60                                           hwaddr virt_addr,
  61                                           ram_addr_t length);
  62
  63 void memory_mapping_list_free(MemoryMappingList *list);
  64
  65 void memory_mapping_list_init(MemoryMappingList *list);
  66
  67 void guest_phys_blocks_free(GuestPhysBlockList *list);
  68 void guest_phys_blocks_init(GuestPhysBlockList *list);
  69 void guest_phys_blocks_append(GuestPhysBlockList *list);
  70
  71 void qemu_get_guest_memory_mapping(MemoryMappingList *list,
  72                                    const GuestPhysBlockList *guest_phys_blocks,
  73                                    Error **errp);
  74
  75 /* get guest's memory mapping without do paging(virtual address is 0). */
  76 void qemu_get_guest_simple_memory_mapping(MemoryMappingList *list,
  77                                   const GuestPhysBlockList *guest_phys_blocks);
  78
  79 void memory_mapping_filter(MemoryMappingList *list, int64_t begin,
  80                            int64_t length);
  81
  82 #endif