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Annotation of qemu/roms/SLOF/board-js2x/slof/citrine-flash.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: 
        !            14: \ we do all flash accesses as 8-bit
        !            15: 
        !            16: 9f000000 CONSTANT citrine-flash-addr
        !            17: 
        !            18: : >citrine-flash  citrine-flash-addr + ;
        !            19: : citrine-flash@  >citrine-flash rb@ ;
        !            20: : citrine-flash!  >citrine-flash rb! ;
        !            21: : wait-for-citrine-flash-ready  BEGIN 0 citrine-flash@ 80 and UNTIL ;
        !            22: : erase-citrine-flash-block ( offset -- )
        !            23:   cr dup 8 .r ."  Erasing..."
        !            24:   20 over citrine-flash! d0 swap citrine-flash! wait-for-citrine-flash-ready ;
        !            25: : write-citrine-flash ( data offset -- )
        !            26:   over ff = IF 2drop EXIT THEN
        !            27:   40 over citrine-flash! citrine-flash! wait-for-citrine-flash-ready ;
        !            28: : write-citrine-flash-block ( addr offset -- ) \ always writes 128kB!
        !            29:   ."  Writing..."
        !            30:   20000 0 DO over i + c@ over i + write-citrine-flash LOOP 2drop
        !            31:   ."  Done." ;
        !            32: : citrine-flash ( addr offset size -- )
        !            33:   BEGIN dup 0 > WHILE >r dup erase-citrine-flash-block
        !            34:   2dup write-citrine-flash-block >r 20000 + r> 20000 + r> 20000 - REPEAT
        !            35:   drop 2drop -1 0 citrine-flash! ;
        !            36: 

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