no power management for athlon xp

hi
i have an athlon XP barton 2600+ on abit NF7S v2 (nforce 2, award bios) latest kernel, ACPI 20040326
i see:

Axis root # cat /proc/acpi/processor/CPU0/info

processor id:            0
acpi id:                 0
bus mastering control:   no
power management:        no
throttling control:      no
limit interface:         no

Axis root # dmesg | grep Processor
ACPI: Processor [CPU0] (supports C1)

so power management is not supported.
it's normal or i can do something for adding the C2 mode support? thanks

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