LXR qemu/include/sysemu/memory

   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
  20typedef 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 */
  34typedef 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. */
  40typedef struct MemoryMapping {
  41    hwaddr phys_addr;
  42    target_ulong virt_addr;
  43    ram_addr_t length;
  44    QTAILQ_ENTRY(MemoryMapping) next;
  45} MemoryMapping;
  46
  47struct 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 */
  58void memory_mapping_list_add_merge_sorted(MemoryMappingList *list,
  59                                          hwaddr phys_addr,
  60                                          hwaddr virt_addr,
  61                                          ram_addr_t length);
  62
  63void memory_mapping_list_free(MemoryMappingList *list);
  64
  65void memory_mapping_list_init(MemoryMappingList *list);
  66
  67void guest_phys_blocks_free(GuestPhysBlockList *list);
  68void guest_phys_blocks_init(GuestPhysBlockList *list);
  69void guest_phys_blocks_append(GuestPhysBlockList *list);
  70
  71void 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). */
  76void qemu_get_guest_simple_memory_mapping(MemoryMappingList *list,
  77                                  const GuestPhysBlockList *guest_phys_blocks);
  78
  79void memory_mapping_filter(MemoryMappingList *list, int64_t begin,
  80                           int64_t length);
  81
  82#endif
  83