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Annotation of qemu/roms/SLOF/slof/fs/available.fs, revision 1.1.1.1

1.1       root        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
                      8: \ *
                      9: \ * Contributors:
                     10: \ *     IBM Corporation - initial implementation
                     11: \ ****************************************************************************/
                     12: 
                     13: VARIABLE chosen-memory-ih 0 chosen-memory-ih !
                     14: 
                     15: \ +
                     16: \ Maintain "available" property.
                     17: \ Sun has a single memory node with "available" property
                     18: \ and separate memory controller nodes.
                     19: \ We corespond memory nodes with their respective memory controllers
                     20: \ and use /chosen/memory as default memory node to hold the "available" map
                     21: \ NOTE -> /chosen/memory is expected 2B initialized before using claim/release
                     22: \ +
                     23: 
                     24: : (chosen-memory-ph) ( -- phandle )
                     25:        chosen-memory-ih @ ?dup 0= IF
                     26:                s" memory" get-chosen IF
                     27:                        decode-int nip nip dup chosen-memory-ih !
                     28:                        ihandle>phandle
                     29:                ELSE 0 THEN
                     30:        ELSE ihandle>phandle THEN
                     31: ;
                     32: 
                     33: : (set-available-prop) ( prop plen -- )
                     34:        s" available"
                     35:        (chosen-memory-ph) ?dup 0<> IF set-property ELSE
                     36:                cr ." Can't find chosen memory node - "
                     37:                ." no available property created" cr
                     38:                2dup 2dup
                     39:        THEN
                     40: ;
                     41: 
                     42: : update-available-property ( available-ptr -- )
                     43:        dup >r available>size@
                     44:        0= r@ available AVAILABLE-SIZE /available * + >= or IF
                     45:                available r> available - encode-bytes (set-available-prop)
                     46:        ELSE
                     47:                r> /available + RECURSE
                     48:        THEN
                     49: ;
                     50: 
                     51: : update-available-property available update-available-property ;
                     52: 
                     53: \ \\\\\\\\\\\\\\ Exported Interface:
                     54: \ +
                     55: \ IEEE 1275 implementation:
                     56: \      claim
                     57: \ Claim the region with given start address and size (if align parameter is 0);
                     58: \ alternatively claim any region of given alignment
                     59: \ +
                     60: \ Throw an exception if failed
                     61: \ +
                     62: : claim ( [ addr ] len align -- base ) claim update-available-property ;
                     63: 
                     64: \ +
                     65: \ IEEE 1275 implementation:
                     66: \      release
                     67: \ Free the region with given start address and size
                     68: \ +
                     69: : release ( addr len -- ) release update-available-property ;
                     70: 
                     71: update-available-property
                     72: 

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