IO Input based on DSDT

A quick question...

Based on the DSDT, is it possible to write userland applications that interrogate the same ports as the DSDT? For example, the battery information method _BIF calls the BIF_ which is the following code.

Arg0 is the battery index.

        SX10()
        SX30(0x1)
        SX30(Arg0)
        SX11()
        Store(SX42(), Index(BIFP, 0x0, ))
        Store(SX42(), Index(BIFP, 0x1, ))
        Store(SX42(), Index(BIFP, 0x2, ))
        Store(SX42(), Index(BIFP, 0x3, ))
        Store(SX42(), Index(BIFP, 0x4, ))
        Store(SX42(), Index(BIFP, 0x5, ))
        Store(SX42(), Index(BIFP, 0x6, ))
        Store(SX42(), Index(BIFP, 0x7, ))
        Store(SX42(), Index(BIFP, 0x8, ))
        Store(SX45(), Index(BIFP, 0x9, ))
        Store(SX45(), Index(BIFP, 0xa, ))
        Store(SX45(), Index(BIFP, 0xb, ))
        Store(SX45(), Index(BIFP, 0xc, ))
        SX12()
        Return(BIFP)

Which is fairly obviously a 'configure', 'read', 'set structure', 'return'.

The question I have is that by digging deep enough into the call graph will I end up with a set of ports that would allow me to extract the data that I want, so that I can then rebuild a working DSDT.

And by extension, could I take some actions that occur on ports, and then look at making those available via ACPI? (Such as fan control which is ignored in the Dell i8200 DSDT).

Regards,

Matt

Matthew Tippett - [email protected] - (416) 435-4118
Technology Forum - http://www.technology-forum.org/
Commercial Open Source - http://www.commercialos.org/


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