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Annotation of qemu/roms/SLOF/board-js2x/slof/flash.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: 
                     14: \ we do all flash accesses as 8-bit
                     15: 
                     16: ff000000 CONSTANT flash-addr
                     17: 
                     18: : >flash  flash-addr + ;
                     19: : flash@  >flash rb@ ;
                     20: : flash!  >flash rb! ;
                     21: : wait-for-flash-ready  BEGIN 0 flash@ 80 and UNTIL ;
                     22: : erase-flash-block ( offset -- )
                     23:   cr dup 8 .r ."  Erasing..."
                     24:   20 over flash! d0 swap flash! wait-for-flash-ready ;
                     25: : write-flash ( data offset -- )
                     26:   40 over flash! flash! wait-for-flash-ready ;
                     27: : write-flash-buffer ( addr offset -- )
                     28:   e8 over flash!  wait-for-flash-ready  1f over flash!
                     29:   20 0 DO over i + c@ over i + flash! LOOP
                     30:   d0 over flash! wait-for-flash-ready 2drop ;
                     31: : write-flash-block ( addr offset -- ) \ always writes 128kB!
                     32:   ."  Writing..."
                     33:   20000 0 DO over i + over i + write-flash-buffer 20 +LOOP 2drop
                     34:   ."  Done." ;
                     35: : flash ( addr offset size -- )
                     36:   BEGIN dup 0 > WHILE >r dup erase-flash-block 2dup write-flash-block
                     37:   >r 20000 + r> 20000 + r> 20000 - REPEAT drop 2drop -1 0 flash! ;
                     38: 
                     39: : flash-it  load-base 0 e0000  flash ;
                     40: : flash4    load-base 0 400000 flash ;
                     41: 
                     42: \ for update-flash
                     43: : flash-image-size  ( addr -- size )  30 + rx@  ;

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