qemu

FORK: QEMU emulator
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memory_mapping.h (2546B)

      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 
     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     vaddr 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