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-common.h"
19 #include "exec/cpu-defs.h"
20 #include "exec/memory.h"
21 
22 typedef struct GuestPhysBlock {
23     /* visible to guest, reflects PCI hole, etc */
24     hwaddr target_start;
25 
26     /* implies size */
27     hwaddr target_end;
28 
29     /* points into host memory */
30     uint8_t *host_addr;
31 
32     /* points to the MemoryRegion that this block belongs to */
33     MemoryRegion *mr;
34 
35     QTAILQ_ENTRY(GuestPhysBlock) next;
36 } GuestPhysBlock;
37 
38 /* point-in-time snapshot of guest-visible physical mappings */
39 typedef struct GuestPhysBlockList {
40     unsigned num;
41     QTAILQ_HEAD(, GuestPhysBlock) head;
42 } GuestPhysBlockList;
43 
44 /* The physical and virtual address in the memory mapping are contiguous. */
45 typedef struct MemoryMapping {
46     hwaddr phys_addr;
47     target_ulong virt_addr;
48     ram_addr_t length;
49     QTAILQ_ENTRY(MemoryMapping) next;
50 } MemoryMapping;
51 
52 struct MemoryMappingList {
53     unsigned int num;
54     MemoryMapping *last_mapping;
55     QTAILQ_HEAD(, MemoryMapping) head;
56 };
57 
58 /*
59  * add or merge the memory region [phys_addr, phys_addr + length) into the
60  * memory mapping's list. The region's virtual address starts with virt_addr,
61  * and is contiguous. The list is sorted by phys_addr.
62  */
63 void memory_mapping_list_add_merge_sorted(MemoryMappingList *list,
64                                           hwaddr phys_addr,
65                                           hwaddr virt_addr,
66                                           ram_addr_t length);
67 
68 void memory_mapping_list_free(MemoryMappingList *list);
69 
70 void memory_mapping_list_init(MemoryMappingList *list);
71 
72 void guest_phys_blocks_free(GuestPhysBlockList *list);
73 void guest_phys_blocks_init(GuestPhysBlockList *list);
74 void guest_phys_blocks_append(GuestPhysBlockList *list);
75 
76 void qemu_get_guest_memory_mapping(MemoryMappingList *list,
77                                    const GuestPhysBlockList *guest_phys_blocks,
78                                    Error **errp);
79 
80 /* get guest's memory mapping without do paging(virtual address is 0). */
81 void qemu_get_guest_simple_memory_mapping(MemoryMappingList *list,
82                                   const GuestPhysBlockList *guest_phys_blocks);
83 
84 void memory_mapping_filter(MemoryMappingList *list, int64_t begin,
85                            int64_t length);
86 
87 #endif
88