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/memory.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    /* 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 */
  37typedef 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. */
  43typedef struct MemoryMapping {
  44    hwaddr phys_addr;
  45    target_ulong virt_addr;
  46    ram_addr_t length;
  47    QTAILQ_ENTRY(MemoryMapping) next;
  48} MemoryMapping;
  49
  50struct 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 */
  61void memory_mapping_list_add_merge_sorted(MemoryMappingList *list,
  62                                          hwaddr phys_addr,
  63                                          hwaddr virt_addr,
  64                                          ram_addr_t length);
  65
  66void memory_mapping_list_free(MemoryMappingList *list);
  67
  68void memory_mapping_list_init(MemoryMappingList *list);
  69
  70void guest_phys_blocks_free(GuestPhysBlockList *list);
  71void guest_phys_blocks_init(GuestPhysBlockList *list);
  72void guest_phys_blocks_append(GuestPhysBlockList *list);
  73
  74void 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). */
  79void qemu_get_guest_simple_memory_mapping(MemoryMappingList *list,
  80                                  const GuestPhysBlockList *guest_phys_blocks);
  81
  82void memory_mapping_filter(MemoryMappingList *list, int64_t begin,
  83                           int64_t length);
  84
  85#endif
  86