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 
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     target_ulong 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 void 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
86