include/qemu/mmap-alloc.h

   1 #ifndef QEMU_MMAP_ALLOC_H
   2 #define QEMU_MMAP_ALLOC_H
   3
   4
   5 size_t qemu_fd_getpagesize(int fd);
   6
   7 size_t qemu_mempath_getpagesize(const char *mem_path);
   8
   9 /**
  10  * qemu_ram_mmap: mmap the specified file or device.
  11  *
  12  * Parameters:
  13  *  @fd: the file or the device to mmap
  14  *  @size: the number of bytes to be mmaped
  15  *  @align: if not zero, specify the alignment of the starting mapping address;
  16  *          otherwise, the alignment in use will be determined by QEMU.
  17  *  @readonly: true for a read-only mapping, false for read/write.
  18  *  @shared: map has RAM_SHARED flag.
  19  *  @is_pmem: map has RAM_PMEM flag.
  20  *  @map_offset: map starts at offset of map_offset from the start of fd
  21  *
  22  * Return:
  23  *  On success, return a pointer to the mapped area.
  24  *  On failure, return MAP_FAILED.
  25  */
  26 void *qemu_ram_mmap(int fd,
  27                     size_t size,
  28                     size_t align,
  29                     bool readonly,
  30                     bool shared,
  31                     bool is_pmem,
  32                     off_t map_offset);
  33
  34 void qemu_ram_munmap(int fd, void *ptr, size_t size);
  35
  36 #endif