obp/obp/os/bootprom/contigph.fth

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\ Hypervisor Software File: contigph.fth
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id: @(#)contigph.fth 1.7 95/08/17
purpose:
copyright: Copyright 1990 Sun Microsystems, Inc.  All Rights Reserved

\ contiguous-range scans the given address range to ensure that the
\ mappings contained within that range are physically contiguous.
\ If not, the length is reduced so that the mappings within the reduced
\ range are physically contiguous.  This is an error check, because there
\ is at least one known FCode driver (old ECL frame buffer driver) which
\ attempts to free a larger range than it allocated.

: contiguous-range  ( adr len -- adr len' )
   over >physical  2over bounds  ?do            ( adr len padr space )
      2dup i >physical  d=  0=  if              ( adr len padr space )
         2swap                                  ( padr space adr len )
         diagnostic-mode?  if
            ." Warning: freeing a range of virtual memory that is not " cr
            ." mapped to physically-contiguous pages." cr
            ." Start address " over .h  ." Length " dup .h
            ." Error address " i .h cr
         then
         drop                                   ( padr space adr )
         i mmu-pagesize round-down over -       ( padr space adr len' )
         2swap  leave                           ( adr len' padr space )
      then                                      ( adr len padr space )
      swap mmu-pagesize + swap                  ( adr len padr' space )
   mmu-pagesize  +loop                          ( adr len padr space )
   2drop                                        ( adr len )
;
' contiguous-range is check-range