obp/obp/dev/pci/memstack.fth

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\ Hypervisor Software File: memstack.fth
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id: @(#)memstack.fth 1.4 06/10/18
purpose:
copyright: Copyright 2006 Sun Microsystems, Inc.  All Rights Reserved
copyright: Use is subject to license terms.

struct
   /n field >stack.next
   /n field >stack.mem-list
   /n field >stack.mem64-list
   /n field >stack.io-list
   /n field >stack.bar-info
constant /stacknode

variable stack-base stack-base off
variable pci-mem64list pci-mem64list off

: get-pointers ( -- reg mem mem64 io )
   bar-struct-addr pci-memlist @  pci-mem64list @ pci-io-list @
;
: set-pointers ( reg mem mem64 io -- )
   pci-io-list !  pci-mem64list ! pci-memlist ! to bar-struct-addr
;

: push-stack ( reg new-mem new-mem64 new-io -- )
   /stacknode alloc-mem >r              ( reg new-mem new-mem64 new-io )( R: node )
   get-pointers                         ( reg new-mem new-mem64 new-io reg mem mem64 io )
   r@ >stack.io-list !                  ( reg new-mem new-mem64 new-io reg mem mem64 )
   r@ >stack.mem64-list !               ( reg new-mem new-mem64 new-io reg mem )
   r@ >stack.mem-list !                 ( reg new-mem new-mem64 new-io reg )
   r@ >stack.bar-info !                 ( reg new-mem new-mem64 new-io )
   stack-base @ r@ >stack.next !        ( reg new-mem new-mem64 new-io )
   set-pointers                         (  )
   r> stack-base !                      (  )( R: )
;

: pop-stack ( -- reg prev-mem prev-mem64 prev-io )
   get-pointers                         ( reg prev-mem prev-mem64 prev-io )
   stack-base @ >r                      ( reg prev-mem prev-mem64 prev-io )( R: base )
   r@ >stack.next @ stack-base !        ( reg prev-mem prev-mem64 prev-io )
   r@ >stack.bar-info @                 ( reg prev-mem prev-mem64 prev-io reg )
   r@ >stack.mem-list @         ( reg prev-mem prev-mem64 prev-io reg mem )
   r@ >stack.mem64-list @               ( reg prev-mem prev-mem64 prev-io reg mem mem64 )
   r@ >stack.io-list @                  ( reg prev-mem prev-mem64 prev-io reg mem mem64 io )
   set-pointers                         ( reg prev-mem prev-mem64 prev-io )
   r> /stacknode free-mem               ( reg prev-mem prev-mem64 prev-io )( R: )
;