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