I have a machine with a _CRS function which shows:
Method (_CRS, 0, NotSerialized)
{
Name (XY0, ResourceTemplate ()
{
WordIO (ResourceProducer, MinFixed, MaxFixed, PosDecode, EntireRange,
0x0000, // Granularity
0x0000, // Range Minimum
0x0000, // Range Maximum
0x0000, // Translation Offset
0x0000, // Length
,, _Y10, TypeStatic)
}
This produces the compiler error:
DSDT.dsl.orig 2364: 0x0000, // Length
Error 4122 - ^ Invalid combination of Length and Min/Max fixed flags
Because iasl thinks this hits this condition:
Advanced Configuration and Power Interface Specification
Revision 3.0b October 10, 2006
6.4.3.5 Address Space Resource Descriptors
Table 6-38 Valid combination of Address Space Descriptors fields
..
_LEN _MIF _MAF Definition
0 1 1 (Illegal combination)
But the _CRS function can still fill up the length of this resource object
parts while _CRS gets executed (and the compiler probably does not
take this into account), by e.g.:
CreateWordField (XY0, \_SB.PCI0._CRS._Y10._LEN, LEN9)
Store (Local0, LEN9)
and the resource, returned to OS, might fulfill the ACPI specification and
return a valid length, _MIF, _MAF combination:
_LEN _MIF _MAF Definition
>0 1 1 Fixed size, fixed location resource descriptor.
_GRA must be 0 and _LEN must be (_MAX - _MIN +1).
I wonder whether my above assumptions are correct and the
Error 4122 should get removed from the iasl compiler, at least in this case?
Thanks,
Thomas
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