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 "exec/cpu-common.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     /* points to the MemoryRegion that this block belongs to */
  31     MemoryRegion *mr;
  32
  33     QTAILQ_ENTRY(GuestPhysBlock) next;
  34 } GuestPhysBlock;
  35
  36 /* point-in-time snapshot of guest-visible physical mappings */
  37 typedef struct GuestPhysBlockList {
  38     unsigned num;
  39     QTAILQ_HEAD(, GuestPhysBlock) head;
  40 } GuestPhysBlockList;
  41
  42 /* The physical and virtual address in the memory mapping are contiguous. */
  43 typedef struct MemoryMapping {
  44     hwaddr phys_addr;
  45     vaddr virt_addr;
  46     ram_addr_t length;
  47     QTAILQ_ENTRY(MemoryMapping) next;
  48 } MemoryMapping;
  49
  50 struct MemoryMappingList {
  51     unsigned int num;
  52     MemoryMapping *last_mapping;
  53     QTAILQ_HEAD(, MemoryMapping) head;
  54 };
  55
  56 /*
  57  * add or merge the memory region [phys_addr, phys_addr + length) into the
  58  * memory mapping's list. The region's virtual address starts with virt_addr,
  59  * and is contiguous. The list is sorted by phys_addr.
  60  */
  61 void memory_mapping_list_add_merge_sorted(MemoryMappingList *list,
  62                                           hwaddr phys_addr,
  63                                           hwaddr virt_addr,
  64                                           ram_addr_t length);
  65
  66 void memory_mapping_list_free(MemoryMappingList *list);
  67
  68 void memory_mapping_list_init(MemoryMappingList *list);
  69
  70 void guest_phys_blocks_free(GuestPhysBlockList *list);
  71 void guest_phys_blocks_init(GuestPhysBlockList *list);
  72 void guest_phys_blocks_append(GuestPhysBlockList *list);
  73
  74 bool qemu_get_guest_memory_mapping(MemoryMappingList *list,
  75                                    const GuestPhysBlockList *guest_phys_blocks,
  76                                    Error **errp);
  77
  78 /* get guest's memory mapping without do paging(virtual address is 0). */
  79 void qemu_get_guest_simple_memory_mapping(MemoryMappingList *list,
  80                                   const GuestPhysBlockList *guest_phys_blocks);
  81
  82 void memory_mapping_filter(MemoryMappingList *list, int64_t begin,
  83                            int64_t length);
  84
  85 #endif