obp/obp/os/bootprom/memmap.fth

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\ Hypervisor Software File: memmap.fth
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id: @(#)memmap.fth 2.9 95/09/18
purpose:
copyright: Copyright 1990 Sun Microsystems, Inc.  All Rights Reserved

\ Map in a physical resource, automatically allocating virtual memory for it.

: memmap  ( pa.lo pa.hi size -- virtual )
   pagemask 2over drop and  ( pa.lo pa.hi size phys-lowbits )
   >r r@ +                  ( pa.lo pa.hi size' )
   dup >r 1  mmu-claim      ( pa.lo pa.hi virt ) ( r: phys-lowbits size )
   r> over >r               ( pa.lo pa.hi virt size ) ( r: phys-lowbits virt )
   mem-mode mmu-map         (  )  ( r: phys-lowbits virt )
   2r> +                    ( virt' )   \ Merge in low order bits
;