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
83