1 \ *****************************************************************************
2 \ * Copyright (c) 2004, 2008 IBM Corporation
3 \ * All rights reserved.
4 \ * This program and the accompanying materials
5 \ * are made available under the terms of the BSD License
6 \ * which accompanies this distribution, and is available at
7 \ * http://www.opensource.org/licenses/bsd-license.php
10 \ * IBM Corporation - initial implementation
11 \ ****************************************************************************/
16 false VALUE debug-find-component?
20 : get-node current-node @ dup 0= ABORT" No active device tree node" ;
24 cell FIELD node>parent
26 cell FIELD node>properties
28 cell FIELD node>instance-template
29 cell FIELD node>instance-size
30 cell FIELD node>space?
37 : find-method ( str len phandle -- false | xt true )
38 node>words @ voc-find dup IF link> true THEN ;
41 #include "instance.fs"
43 : create-node ( parent -- new )
44 max-instance-size alloc-mem ( parent instance-mem )
45 dup max-instance-size erase >r ( parent R: instance-mem )
46 align wordlist >r wordlist >r ( parent R: instance-mem wl wl )
47 here ( parent new R: instance-mem wl wl )
48 0 , swap , 0 , \ Set node>peer, node>parent & node>child
49 r> , r> , \ Set node>properties & node>words to wl
50 r> , /instance-header , \ Set instance-template & instance-size
51 FALSE , 0 , \ Set node>space? and node>space
52 0 , 0 , 0 , \ Set node>addr*
56 : parent node>parent @ ;
57 : child node>child @ ;
58 : peer dup IF peer ELSE drop device-tree @ THEN ;
61 : link ( new head -- ) \ link a new node at the end of a linked list
62 BEGIN dup @ WHILE @ REPEAT ! ;
63 : link-node ( parent child -- )
64 swap dup IF node>child link ELSE drop device-tree ! THEN ;
66 \ Set a node as active node.
67 : set-node ( phandle -- )
68 current-node @ IF previous THEN
70 ?dup IF node>words @ also context ! THEN
72 : get-parent get-node parent ;
75 : new-node ( -- phandle ) \ active node becomes new node's parent;
76 \ new node becomes active node
77 \ XXX: change to get-node, handle root node creation specially
78 current-node @ dup create-node
79 tuck link-node dup set-node ;
82 \ TODO: maybe resize the instance template buffer here (or in finish-device)?
83 get-node parent set-node
86 : device-end ( -- ) 0 set-node ;
89 CREATE $indent 100 allot VARIABLE indent 0 indent !
90 #include "property.fs"
93 : #address-cells s" #address-cells" rot parent get-property
94 ABORT" parent doesn't have a #address-cells property!"
98 \ my-#address-cells returns the #address-cells property of the parent node.
99 \ child-#address-cells returns the #address-cells property of the current node.
101 \ This is confusing in several ways: Remember that a node's address is always
102 \ described in the parent's address space, thus the parent's property is taken
103 \ into regard, rather than the own.
105 \ Also, an address-cell here is always a 32bit cell, no matter whether the
106 \ "real" cell size is 32bit or 64bit.
108 : my-#address-cells ( -- #address-cells )
109 get-node #address-cells
112 : child-#address-cells ( -- #address-cells )
113 s" #address-cells" get-node get-property
114 ABORT" node doesn't have a #address-cells property!"
118 : child-#size-cells ( -- #address-cells )
119 s" #size-cells" get-node get-property
120 ABORT" node doesn't have a #size-cells property!"
124 : encode-phys ( phys.hi ... phys.low -- prop len )
125 encode-first? IF encode-start ELSE here 0 THEN
126 my-#address-cells 0 ?DO rot encode-int+ LOOP
129 : encode-child-phys ( phys.hi ... phys.low -- prop len )
130 encode-first? IF encode-start ELSE here 0 THEN
131 child-#address-cells 0 ?DO rot encode-int+ LOOP
134 : encode-child-size ( size.hi ... size.low -- prop len )
135 encode-first? IF encode-start ELSE here 0 THEN
136 child-#size-cells 0 ?DO rot encode-int+ LOOP
140 my-#address-cells BEGIN dup WHILE 1- >r decode-int r> swap >r REPEAT drop
141 my-#address-cells BEGIN dup WHILE 1- r> swap REPEAT drop ;
142 : decode-phys-and-drop
143 my-#address-cells BEGIN dup WHILE 1- >r decode-int r> swap >r REPEAT 3drop
144 my-#address-cells BEGIN dup WHILE 1- r> swap REPEAT drop ;
145 : reg >r encode-phys r> encode-int+ s" reg" property ;
148 : >space node>space @ ;
149 : >space? node>space? @ ;
150 : >address dup >r #address-cells dup 3 > IF r@ node>addr3 @ swap THEN
151 dup 2 > IF r@ node>addr2 @ swap THEN
152 1 > IF r@ node>addr1 @ THEN r> drop ;
153 : >unit dup >r >address r> >space ;
155 : (my-phandle) ( -- phandle )
159 get-node dup 0= ABORT" no active node"
163 : my-space ( -- phys.hi )
166 : my-address (my-phandle) >address ;
168 \ my-unit returns the unit address of the current _instance_ - that means
169 \ it returns the same values as my-space and my-address together _or_ it
170 \ returns a unit address that has been set manually while opening the node.
172 my-self instance>#units @ IF
173 0 my-self instance>#units @ 1- DO
174 my-self instance>unit1 i cells + @
177 my-self ihandle>phandle >unit
181 \ Return lower 64 bit of address
182 : my-unit-64 ( -- phys.lo+1|phys.lo )
183 my-unit ( phys.lo ... phys.hi )
184 (my-phandle) #address-cells ( phys.lo ... phys.hi #ad-cells )
187 2 OF lxjoin EXIT ENDOF
188 3 OF drop lxjoin EXIT ENDOF
189 dup OF 2drop lxjoin EXIT ENDOF
193 : set-space get-node dup >r node>space ! true r> node>space? ! ;
194 : set-address my-#address-cells 1 ?DO
195 get-node node>space i cells + ! LOOP ;
196 : set-unit set-space set-address ;
197 : set-unit-64 ( phys.lo|phys.hi -- )
198 my-#address-cells 2 <> IF
199 ." set-unit-64: #address-cells <> 2 " abort
204 \ Never ever use this in actual code, only when debugging interactively.
206 : set-args ( arg-str len unit-str len -- )
207 s" decode-unit" get-parent $call-static set-unit set-my-args
211 dup parent 0= IF drop EXIT THEN
212 dup >space? not IF drop EXIT THEN
213 dup >r >unit s" encode-unit" r> parent $call-static
215 dup >r here swap move s" @" $cat here r> $cat
222 dup parent 0= IF drop EXIT THEN
223 \ No instance unit, use node unit
224 dup instance>#units @ 0= IF
225 ihandle>phandle $cat-unit
229 ['] my-unit CATCH IF pop-my-self r> drop EXIT THEN
232 r> ihandle>phandle parent
235 dup >r here swap move s" @" $cat here r> $cat
241 \ Getting basic info about a node.
242 : node>name dup >r s" name" rot get-property IF r> (u.) ELSE 1- r> drop THEN ;
243 : node>qname dup node>name rot ['] $cat-unit CATCH IF drop THEN ;
246 BEGIN dup WHILE dup parent REPEAT
248 dup 0= IF [char] / c, THEN
252 [char] / c, node>qname here over allot swap move
254 drop here 2dup - allot over -
257 : interposed? ( ihandle -- flag )
258 \ We cannot actually detect if an instance is interposed; instead, we look
259 \ if an instance is part of the "normal" chain that would be opened by
260 \ open-dev and friends, if there were no interposition.
261 dup instance>parent @ dup 0= IF 2drop false EXIT THEN
262 ihandle>phandle swap ihandle>phandle parent <> ;
265 dup >r interposed? IF s" %" ELSE 0 0 THEN
266 r@ dup ihandle>phandle node>name
267 rot ['] $cat-instance-unit CATCH IF drop THEN
268 $cat r> instance>args 2@ swap
269 dup IF 2>r s" :" $cat 2r> $cat ELSE 2drop THEN
272 : instance>qpath \ With interposed nodes.
273 here 0 rot BEGIN dup WHILE dup instance>parent @ REPEAT 2drop
274 dup 0= IF [char] / c, THEN
275 BEGIN dup WHILE [char] / c, instance>qname here over allot swap move
276 REPEAT drop here 2dup - allot over - ;
277 : instance>path \ Without interposed nodes.
278 here 0 rot BEGIN dup WHILE
279 dup interposed? 0= IF dup THEN instance>parent @ REPEAT 2drop
280 dup 0= IF [char] / c, THEN
281 BEGIN dup WHILE [char] / c, instance>qname here over allot swap move
282 REPEAT drop here 2dup - allot over - ;
284 : .node node>path type ;
285 : pwd get-node .node ;
287 : .instance instance>qpath type ;
288 : .chain dup instance>parent @ ?dup IF recurse THEN
289 cr dup . instance>qname type ;
294 : set-alias ( alias-name len device-name len -- )
296 2swap s" /aliases" find-node ?dup IF
303 : find-alias ( alias-name len -- false | dev-path len )
304 s" /aliases" find-node dup IF
305 get-property 0= IF 1- dup 0= IF nip THEN ELSE false THEN
309 : .alias ( alias-name len -- )
310 find-alias dup IF type ELSE ." no alias available" THEN ;
312 : (.print-alias) ( lfa -- )
313 link> dup >name name>string
314 \ Don't print name property
315 2dup s" name" string=ci IF 2drop drop
316 ELSE cr type space ." : " execute type
319 : (.list-alias) ( phandle -- )
320 node>properties @ cell+ @ BEGIN dup WHILE dup (.print-alias) @ REPEAT drop ;
323 s" /aliases" find-node dup IF (.list-alias) THEN ;
325 \ return next available name for aliasing or
326 \ false if more than MAX-ALIAS aliases found
329 : get-next-alias ( $alias-name -- $next-alias-name|FALSE )
334 2dup alias-ind $cathex 2dup find-alias
337 alias-ind 1 + TO alias-ind
338 alias-ind MAX-ALIAS = IF
346 : devalias ( "{alias-name}<>{device-specifier}<cr>" -- )
347 parse-word parse-word dup IF set-alias
348 ELSE 2drop dup IF .alias
349 ELSE 2drop list-alias THEN THEN ;
351 \ sub-alias does a single iteration of an alias at the beginning od dev path
352 \ expression. de-alias will repeat this until all indirect alising is resolved
353 : sub-alias ( arg-str arg-len -- arg' len' | false )
355 2dup [char] / findchar ?dup IF ELSE 2dup [char] : findchar THEN
356 ( a l a l [p] -1|0 ) IF nip dup ELSE 2drop 0 THEN >r
357 ( a l l p -- R:p | a l -- R:0 )
358 find-alias ?dup IF ( a l a' p' -- R:p | a' l' -- R:0 )
360 2swap r@ - swap r> + swap $cat strdup ( a" l-p+p' -- )
362 ( a' l' -- R:0 ) r> drop ( a' l' -- )
365 ( a l -- R:p | -- R:0 ) r> IF 2drop THEN
370 : de-alias ( arg-str arg-len -- arg' len' )
372 over c@ [char] / <> dup IF drop 2dup sub-alias ?dup THEN
379 \ Display the device tree.
380 : +indent ( not-last? -- )
381 IF s" | " ELSE s" " THEN $indent indent @ + swap move 4 indent +! ;
382 : -indent ( -- ) -4 indent +! ;
384 : ls-phandle ( node -- ) . ." : " ;
386 : ls-node ( node -- )
388 $indent indent @ type
389 dup peer IF ." |-- " ELSE ." +-- " THEN
394 child BEGIN dup WHILE dup ls-node dup child IF
395 dup peer +indent dup recurse -indent THEN peer REPEAT drop ;
405 : show-devs ( {device-specifier}<eol> -- )
406 skipws 0 parse dup IF de-alias ELSE 2drop s" /" THEN ( str len )
407 find-node dup 0= ABORT" No such device path" (ls)
411 VARIABLE interpose-node
412 2VARIABLE interpose-args
413 : interpose ( arg len phandle -- ) interpose-node ! interpose-args 2! ;
416 0 VALUE user-instance-#units
417 CREATE user-instance-units 4 cells allot
419 \ Copy the unit information (specified by the user) that we've found during
420 \ "find-component" into the current instance data structure
421 : copy-instance-unit ( -- )
422 user-instance-#units IF
423 user-instance-#units my-self instance>#units !
424 user-instance-units my-self instance>unit1 user-instance-#units cells move
425 0 to user-instance-#units
430 : open-node ( arg len phandle -- ihandle|0 )
431 current-node @ >r my-self >r \ Save current node and instance
432 set-node create-instance set-my-args
434 \ Execute "open" method if available, and assume default of
435 \ success (=TRUE) for nodes without open method:
436 s" open" get-node find-method IF execute ELSE TRUE THEN
438 my-self destroy-instance 0 to my-self
440 my-self ( ihandle|0 )
441 r> to my-self r> set-node \ Restore current node and instance
442 \ Handle interposition:
444 my-self >r to my-self
445 interpose-args 2@ interpose-node @
446 interpose-node off recurse
451 : close-node ( ihandle -- )
452 my-self >r to my-self
453 s" close" ['] $call-my-method CATCH IF 2drop THEN
454 my-self destroy-instance r> to my-self ;
456 : close-dev ( ihandle -- )
457 my-self >r to my-self
458 BEGIN my-self WHILE my-parent my-self close-node to my-self REPEAT
462 my-self new-node ( parent-ihandle phandle )
463 node>instance-template @ ( parent-ihandle ihandle )
464 dup to my-self ( parent-ihanlde ihandle )
466 get-node my-self instance>node !
467 max-instance-size my-self instance>size !
470 : finish-device ( -- )
471 \ Set unit address to first entry of reg property if it has not been set yet
472 get-node >space? 0= IF
473 s" reg" get-node get-property 0= IF
474 decode-int set-space 2drop
477 finish-node my-parent to my-self
480 \ Set the instance template as current instance for extending it
481 \ (i.e. to be able to declare new INSTANCE VARIABLEs etc. there)
482 : extend-device ( phandle -- )
485 node>instance-template @
487 r> swap instance>parent !
490 : split ( str len char -- left len right len )
491 >r 2dup r> findchar IF >r over r@ 2swap r> 1+ /string ELSE 0 0 THEN ;
492 : generic-decode-unit ( str len ncells -- addr.lo ... addr.hi )
493 dup >r -rot BEGIN r@ WHILE r> 1- >r [char] , split 2swap
494 $number IF 0 THEN r> swap >r >r REPEAT r> 3drop
495 BEGIN dup WHILE 1- r> swap REPEAT drop ;
496 : generic-encode-unit ( addr.lo ... addr.hi ncells -- str len )
497 0 0 rot ?dup IF 0 ?DO rot (u.) $cat s" ," $cat LOOP 1- THEN ;
498 : hex-decode-unit ( str len ncells -- addr.lo ... addr.hi )
499 base @ >r hex generic-decode-unit r> base ! ;
500 : hex-encode-unit ( addr.lo ... addr.hi ncells -- str len )
501 base @ >r hex generic-encode-unit r> base ! ;
503 : hex64-decode-unit ( str len ncells -- addr.lo ... addr.hi )
509 $number IF 0 0 ELSE xlsplit THEN
514 : hex64-encode-unit ( addr.lo ... addr.hi ncells -- str len )
525 : handle-leading-/ ( path len -- path' len' )
526 dup IF over c@ [char] / = IF 1 /string device-tree @ set-node THEN THEN ;
527 : match-name ( name len node -- match? )
528 over 0= IF 3drop true EXIT THEN
529 s" name" rot get-property IF 2drop false EXIT THEN
530 1- string=ci ; \ XXX should use decode-string
533 CREATE search-unit 4 cells allot
535 : match-unit ( node -- match? )
536 \ A node with no space is a wildcard and will always match
538 node>space search-unit #search-unit 0 ?DO 2dup @ swap @ <> IF
539 2drop false UNLOOP EXIT THEN cell+ swap cell+ swap LOOP 2drop true
542 : match-node ( name len node -- match? )
543 dup >r match-name r> match-unit and ; \ XXX e3d
544 : find-kid ( name len -- node|0 )
545 dup -1 = IF \ are we supposed to stay in the same node? -> resolve-relatives
548 get-node child >r BEGIN r@ WHILE 2dup r@ match-node
549 IF 2drop r> EXIT THEN r> peer >r REPEAT
553 : set-search-unit ( unit len -- )
555 0 to user-instance-#units
556 dup 0= IF 2drop EXIT THEN
557 s" #address-cells" get-node get-property THROW
558 decode-int to #search-unit 2drop
559 s" decode-unit" get-node $call-static
560 #search-unit 0 ?DO search-unit i cells + ! LOOP
563 : resolve-relatives ( path len -- path' len' )
565 2dup 2 = swap s" .." comp 0= and IF
566 get-node parent ?dup IF
569 s" Already in root node." type
573 2dup 1 = swap c@ [CHAR] . = and IF
578 \ XXX This is an old hack that allows wildcard nodes to work
579 \ by not having a #address-cells in the parent and no
580 \ decode unit. This should be removed.
581 \ (It appears to be still used on js2x)
582 : set-instance-unit ( unitaddr len -- )
583 dup 0= IF 2drop 0 to user-instance-#units EXIT THEN
584 2dup 0 -rot bounds ?DO
585 i c@ [char] , = IF 1+ THEN \ Count the commas
587 1+ dup to user-instance-#units
589 user-instance-#units 0 ?DO
590 user-instance-units i cells + !
594 : split-component ( path. -- path'. args. name. unit. )
595 [char] / split 2swap ( path'. component. )
596 [char] : split 2swap ( path'. args. name@unit. )
597 [char] @ split ( path'. args. name. unit. )
600 : find-component ( path len -- path' len' args len node|0 )
601 debug-find-component? IF
602 ." find-component for " 2dup type cr
604 split-component ( path'. args. name. unit. )
605 debug-find-component? IF
606 ." -> unit =" 2dup type cr
609 ['] set-search-unit CATCH IF
610 \ XXX: See comment in set-instance-unit
611 ." WARNING: Obsolete old wildcard hack " .s cr
614 resolve-relatives find-kid ( path' len' args len node|0 )
616 \ If resolve returned a wildcard node, and we haven't hit
617 \ the above gross hack then copy the unit
618 dup IF dup >space? not #search-unit 0 > AND user-instance-#units 0= AND IF
619 #search-unit dup to user-instance-#units 0 ?DO
620 search-unit i cells + @ user-instance-units i cells + !
624 \ XXX This can go away with the old wildcard hack
625 dup IF dup >space? user-instance-#units 0 > AND IF
626 \ User supplied a unit value, but node also has different physical unit
627 cr ." find-component with unit mismatch!" .s cr
632 : .find-node ( path len -- phandle|0 )
634 handle-leading-/ current-node @ 0= IF 2drop r> set-node 0 EXIT THEN
635 BEGIN dup WHILE \ handle one component:
636 find-component ( path len args len node ) dup 0= IF
637 3drop 2drop r> set-node 0 EXIT THEN
638 set-node 2drop REPEAT 2drop
639 get-node r> set-node ;
640 ' .find-node to find-node
641 : find-node ( path len -- phandle|0 ) de-alias find-node ;
643 : delete-node ( phandle -- )
644 dup node>instance-template @ max-instance-size free-mem
645 dup node>parent @ node>child @ ( phandle 1st peer )
647 node>peer @ swap node>parent @ node>child !
656 dup 0= IF 2drop drop unloop EXIT THEN
659 node>peer @ swap node>peer !
663 : open-dev ( path len -- ihandle|0 )
664 0 to user-instance-#units
665 de-alias current-node @ >r
666 handle-leading-/ current-node @ 0= IF 2drop r> set-node 0 EXIT THEN
672 WHILE \ handle one component:
673 ( arg len ) r> r> get-node open-node to my-self
674 find-component ( path len args len node ) dup 0= IF
675 3drop 2drop my-self close-dev
685 r> r> get-node open-node to my-self
686 my-self r> to my-self r> set-node
689 : select-dev open-dev dup to my-self ihandle>phandle set-node ;
690 : unselect-dev my-self close-dev 0 to my-self device-end ;
692 : find-device ( str len -- ) \ set as active node
693 find-node dup 0= ABORT" No such device path" set-node ;
694 : dev parse-word find-device ;
696 : (lsprop) ( node --)
697 dup cr $indent indent @ type ." node: " node>qname type
698 false +indent (.properties) cr -indent
700 : (show-children) ( node -- )
704 dup (lsprop) dup child IF false +indent dup recurse -indent THEN peer
708 : lsprop ( {device-specifier}<eol> -- )
709 skipws 0 parse dup IF de-alias ELSE 2drop s" /" THEN
710 find-device get-node dup dup
711 cr ." node: " node>path type (.properties) cr (show-children)
716 \ node>path does not allot the memory, since it is internally only used
718 \ The external variant needs to allot memory !
720 : (node>path) node>path ;
722 : node>path ( phandle -- str len )
726 \ Support for support packages.
728 \ The /packages node.
731 \ Find a support package (or arbitrary nodes when name is absolute)
732 : find-package ( name len -- false | phandle true )
736 \ According to IEEE 1275 Proposal 215 (Extensible Client Services Package),
737 \ the find-package method can be used to get the phandle of arbitrary nodes
738 \ (i.e. not only support packages) when the name starts with a slash.
739 \ Some FCODE programs depend on this behavior so let's support this, too!
740 over c@ [char] / = IF
741 find-node dup IF TRUE THEN EXIT
743 \ Ok, let's look for support packages instead. We can't use the standard
744 \ find-node stuff, as we are required to find the newest (i.e., last in our
745 \ tree) matching package, not just any.
750 dup >r node>name 2over string=ci r> swap IF
759 : open-package ( arg len phandle -- ihandle | 0 ) open-node ;
760 : close-package ( ihandle -- ) close-node ;
761 : $open-package ( arg len name len -- ihandle | 0 )
762 find-package IF open-package ELSE 2drop false THEN ;
765 \ device tree translate-address
766 #include <translate.fs>