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 "exec/cpu-defs.h"
  19#include "exec/memory.h"
  20
  21typedef struct GuestPhysBlock {
  22    /* visible to guest, reflects PCI hole, etc */
  23    hwaddr target_start;
  24
  25    /* implies size */
  26    hwaddr target_end;
  27
  28    /* points into host memory */
  29    uint8_t *host_addr;
  30
  31    /* points to the MemoryRegion that this block belongs to */
  32    MemoryRegion *mr;
  33
  34    QTAILQ_ENTRY(GuestPhysBlock) next;
  35} GuestPhysBlock;
  36
  37/* point-in-time snapshot of guest-visible physical mappings */
  38typedef struct GuestPhysBlockList {
  39    unsigned num;
  40    QTAILQ_HEAD(, GuestPhysBlock) head;
  41} GuestPhysBlockList;
  42
  43/* The physical and virtual address in the memory mapping are contiguous. */
  44typedef struct MemoryMapping {
  45    hwaddr phys_addr;
  46    target_ulong virt_addr;
  47    ram_addr_t length;
  48    QTAILQ_ENTRY(MemoryMapping) next;
  49} MemoryMapping;
  50
  51struct MemoryMappingList {
  52    unsigned int num;
  53    MemoryMapping *last_mapping;
  54    QTAILQ_HEAD(, MemoryMapping) head;
  55};
  56
  57/*
  58 * add or merge the memory region [phys_addr, phys_addr + length) into the
  59 * memory mapping's list. The region's virtual address starts with virt_addr,
  60 * and is contiguous. The list is sorted by phys_addr.
  61 */
  62void memory_mapping_list_add_merge_sorted(MemoryMappingList *list,
  63                                          hwaddr phys_addr,
  64                                          hwaddr virt_addr,
  65                                          ram_addr_t length);
  66
  67void memory_mapping_list_free(MemoryMappingList *list);
  68
  69void memory_mapping_list_init(MemoryMappingList *list);
  70
  71void guest_phys_blocks_free(GuestPhysBlockList *list);
  72void guest_phys_blocks_init(GuestPhysBlockList *list);
  73void guest_phys_blocks_append(GuestPhysBlockList *list);
  74
  75void qemu_get_guest_memory_mapping(MemoryMappingList *list,
  76                                   const GuestPhysBlockList *guest_phys_blocks,
  77                                   Error **errp);
  78
  79/* get guest's memory mapping without do paging(virtual address is 0). */
  80void qemu_get_guest_simple_memory_mapping(MemoryMappingList *list,
  81                                  const GuestPhysBlockList *guest_phys_blocks);
  82
  83void memory_mapping_filter(MemoryMappingList *list, int64_t begin,
  84                           int64_t length);
  85
  86#endif
  87