obp/obp/dev/sun4v-devices/utilities/svc.fth

\ ========== Copyright Header Begin ==========================================
\
\ Hypervisor Software File: svc.fth
\
\ Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
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\ ========== Copyright Header End ============================================
id: @(#)svc.fth 1.1 06/02/16
purpose:
copyright: Copyright 2006 Sun Microsystems, Inc.  All Rights Reserved
copyright: Use is subject to license terms.

\
\ This is a simple wrapper to the htraps that run the svc buffers.
\
\ Call init-svc before you use the interfaces.
\

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0       instance value my-svc
0       instance value my-mtu
0       instance value inbuf
0       instance value outbuf
0       instance value pibuf
0       instance value pobuf

headers

: init-svc ( svc mtu -- )
   dup alloc-mem is inbuf
   dup alloc-mem is outbuf
   is my-mtu
   is my-svc
   inbuf >physical drop is pibuf
   outbuf >physical drop is pobuf
;

: finish-svc ( -- )
   inbuf my-mtu free-mem
   outbuf my-mtu free-mem
;

: getstatus ( -- reg )  begin my-svc 1 2 h# 82 h# 80 htrap 0= until ;
: setstatus ( reg -- )  begin my-svc swap 2 1 h# 83 h# 80 htrap 0= until  ;
: clrstatus ( reg -- )  begin my-svc swap 2 1 h# 84 h# 80 htrap 0= until ;

: send? ( -- flag )          getstatus h# 10 and 0= ;
: recv? ( -- key )           getstatus h# 01 and 0<> ;

\ these two are raw.. they assume you have check status before calling them
: recv ( -- len )
   my-svc pibuf my-mtu 3 2 h# 81 h# 80 htrap if
     drop 0
   else
      1 clrstatus
   then
;

: send ( len -- )
   h# 4 clrstatus >r my-svc pobuf r> 3 1 h# 80 h# 80 htrap drop
;

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