On Alpha and Integrity server systems, establishes a
    correspondence between pages in the virtual address space of the
    process and the pages occupied by a global page frame section.

    This service accepts 64-bit addresses.

    Format

      SYS$MGBLSC_GPFN_64  gs_name_64 ,ident_64 ,region_id_64

                          ,relative_page ,page_count ,acmode

                          ,flags ,return_va_64 ,return_length_64

                          [,start_va_64]

    C Prototype

      int sys$mgblsc_gpfn_64  (void *gsdnam_64, struct _secid

                              *ident_64, struct _generic_64

                              *region_id_64, unsigned int

                              relative_page, unsigned int

                              page_count, unsigned int

                              acmode, unsigned int flags, void

                              *(*(return_va_64)), unsigned __int64

                              *return_length_64,...);