Author: wmb Date: 2010-01-13 01:33:41 +0100 (Wed, 13 Jan 2010) New Revision: 1667
Modified: ofw/disklabel/methods.fth Log: disklabel package - added the ability to specify a "partition" as the last N blocks of a device. This is useful for NANDblaster.
Modified: ofw/disklabel/methods.fth =================================================================== --- ofw/disklabel/methods.fth 2010-01-13 00:32:30 UTC (rev 1666) +++ ofw/disklabel/methods.fth 2010-01-13 00:33:41 UTC (rev 1667) @@ -58,6 +58,9 @@ ;
: select-partition ( -- ) + \ If parse-partition set #part to -2, it already mapped the partition + #part -2 = if exit then + \ Partition 0 is the raw disk, in which case we leave sector-offset at 0 \ and avoid reading the disk. Otherwise, we try to determine what sort \ of partition map the disk has, if any, and from that determine the @@ -184,6 +187,23 @@ dup 0= if 2drop exit then ( adr len ) then ( adr len )
+ \ If the first character is "-", it is followed by a decimal number N and + \ the "partition" is the last N blocks + over c@ ascii - = if ( adr len ) + 1 /string ( adr' len' ) + push-decimal $number pop-base if ( ) + ." Bad decimal number after '-' in partition spec" cr + exit + then ( n ) + /sector um* ( d.partition-size ) + get-disk-size size-low size-high ( d.partition-size d.disk-size ) + 2over d- /sector um/mod nip ( d.partition-size partition-sector ) + to sector-offset ( d.partition-size ) + to size-high to size-low ( ) + -2 to #part ( ) \ Tell select-partition + exit + then ( adr len ) + \ If the first character of the string is ",", discard it over c@ ascii , = if ( adr len ) 1 /string ( adr' len' )
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