obp/obp/dev/pci/make-path.fth

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h# 80 buffer: pci-path

\ I'm not sure if the userland interpreter can cope with the
\ package-to-path client-service; so just in case it cannot
\ I have implemented a recursive FCODE implementation.
\
\ Unless memory is an issue; use-cif? need not be defined.
\

[ifdef] use-cif?
defer package-to-path  0 " package-to-path" do-cif is package-to-path

: make-path$ ( -- ok? )
   pci-path 0 over c!                           ( buf )
   h# 7f over 1+                                ( buf len buf' )
   my-self ihandle>phandle                      ( buf len phandle )
   package-to-path                              ( buf len' )
   swap c!                                      ( )
   true                                         ( true )
;

[else]

: >path$ ( $adr,len -- )
   tuck pci-path count +                ( len adr len buf-end-adr )
   swap move                            ( len )
   pci-path dup c@                      ( len buf-adr buf-old-len )
   rot + swap c!
;

: (assemble-path) ( -- )
   " name"           get-my-property if        exit  then       ( namep,len )
   " reg"            get-my-property if  2drop exit  then
   " #address-cells"  my-parent ihandle>phandle get-package-property
   if  2 else  decode-int nip nip then
   dup >r 0 ?do                                 ( namep,len regp,len )
      decode-int -rot                           ( namep,len ?? regp,len' )
   loop 2drop                                   ( namep,len ?? )
   r> case
     2 of  swap  endof
     3 of  -rot swap  endof
   endcase                                      ( namep,len pa.lo..pa.hi )
   " encode-unit" $call-parent                  ( namep,len unit$ )
   " /" >path$ 2swap decode-string >path$       ( unit$ xdr,len )
   2drop " @" >path$ >path$                     ( )
;

: (fallback-make-path$) ( -- )
   recursive
   my-parent if
      my-self >r  my-parent  is  my-self
      (fallback-make-path$)  r> is my-self
      (assemble-path)
   then
;

: make-path$ ( -- ok? )
   0 pci-path c!  (fallback-make-path$)  true
;
[then]

: .path$ ( -- )  pci-path count type  ;

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