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There are already some user-land interfaces in the ACPI driver. The
interface is provided in two ways: /dev/acpi ioctl's and hw.acpi
sysctls. Currently provided interfaces are:
- Battery charge information.
- Thermal zone information.
- CPU speed configuration.
There is a piece missing relating to the ACPI event notification
system. We plan to use kqueue [7] to
implement the event notification system.
Takanori Watanabe
2002-04-13