- do {
- prop = OSDynamicCast( OSData, regEntry->getProperty( gIODTRangeKey ));
- if( 0 == prop) {
- /* end of the road */
- *phys = IOPhysical32( 0, cell[ childAddressCells - 1 ] + offset);
- break;
- }
-
- parent = regEntry->getParentEntry( gIODTPlane );
- IODTGetCellCounts( parent, &sizeCells, &addressCells );
-
- if( (length = prop->getLength())) {
- // search
- range = (UInt32 *) prop->getBytesNoCopy();
- endRanges = range + (length / 4);
-
- prop = (OSData *) regEntry->getProperty( gIODTPersistKey );
- if( prop) {
- persist = (IODTPersistent *) prop->getBytesNoCopy();
- compare = persist->compareFunc;
- } else
- compare = DefaultCompare;
-
- for( ok = false;
- range < endRanges;
- range += (childCells + addressCells) ) {
-
- // is cell >= range start?
- diff = (*compare)( childAddressCells, cell, range );
- if( diff < 0)
- continue;
-
- // is cell + size <= range end?
- if( (diff + cell[ childCells - 1 ])
- > range[ childCells + addressCells - 1 ])
- continue;
-
- offset += diff;
- ok = true;
- break;
- }
-
- // Get the physical start of the range from our parent
- bcopy( range + childAddressCells, cell, 4 * addressCells );
- bzero( cell + addressCells, 4 * sizeCells );
-
- } /* else zero length range => pass thru to parent */
+ do
+ {
+ prop = OSDynamicCast( OSData, regEntry->getProperty( gIODTRangeKey ));
+ if( 0 == prop) {
+ /* end of the road */
+ *phys = IOPhysical32( 0, cell[ childAddressCells - 1 ] + offset);
+ break;
+ }
+
+ parent = regEntry->getParentEntry( gIODTPlane );
+ IODTGetCellCounts( parent, &sizeCells, &addressCells );
+
+ if( (length = prop->getLength())) {
+ // search
+ startRange = (UInt32 *) prop->getBytesNoCopy();
+ range = startRange;
+ endRanges = range + (length / sizeof(UInt32));
+
+ prop = (OSData *) regEntry->getProperty( gIODTPersistKey );
+ if( prop) {
+ persist = (IODTPersistent *) prop->getBytesNoCopy();
+ compare = persist->compareFunc;
+ } else
+ compare = DefaultCompare;
+
+ for( ok = false;
+ range < endRanges;
+ range += (childCells + addressCells) ) {
+
+ // is cell start within range?
+ diff = (*compare)( childAddressCells, cell, range );
+
+ bcopy(range, endCell, childAddressCells * sizeof(UInt32));
+ endCell[childAddressCells - 1] += range[childCells + addressCells - 1];
+ diff2 = (*compare)( childAddressCells, cell, endCell );
+
+ if ((diff < 0) || (diff2 >= 0))
+ continue;
+
+ ok = (0 == cell[childCells - 1]);
+ if (!ok)
+ {
+ // search for cell end
+ bcopy(cell, endCell, childAddressCells * sizeof(UInt32));
+ endCell[childAddressCells - 1] += cell[childCells - 1] - 1;
+ lookRange = startRange;
+ for( ;
+ lookRange < endRanges;
+ lookRange += (childCells + addressCells) )
+ {
+ // is cell >= range start?
+ endDiff = (*compare)( childAddressCells, endCell, lookRange );
+ if( endDiff < 0)
+ continue;
+ if ((endDiff - cell[childCells - 1] + 1 + lookRange[childAddressCells + addressCells - 1])
+ == (diff + range[childAddressCells + addressCells - 1]))
+ {
+ ok = true;
+ break;
+ }
+ }
+ if (!ok)
+ continue;
+ }
+ offset += diff;
+ break;
+ }
+
+ // Get the physical start of the range from our parent
+ bcopy( range + childAddressCells, cell, sizeof(UInt32) * addressCells );
+ bzero( cell + addressCells, sizeof(UInt32) * sizeCells );
+
+ } /* else zero length range => pass thru to parent */
projects / apple / xnu.git / blobdiff