AMD A12-8800B ACPI questions (turbo mode, temp zones)

[Johannes Dieterich]

Dear list,

I am running CURRENT on an HP elitebook 745 G3 which comes with a AMD
A12-8800B CPU. All in all, it runs very well with just a few nits to
pick. Two of them are ACPI related.

1) there are 5 thermal zones defined out of which only two provide
reasonable numbers it seems:

hw.acpi.thermal.tz4.temperature: 34.1C
hw.acpi.thermal.tz3.temperature: 0.1C
hw.acpi.thermal.tz2.temperature: 0.1C
hw.acpi.thermal.tz1.temperature: 0.1C
hw.acpi.thermal.tz0.temperature: 56.1C

my gut feeling is that tz0-tz3 may be the CPU cores and tz4 would be
the GPU (which does not work in BSD ATM, hence consistently lower
temp). I guess this is not a big deal (everything works) but I still
wonder how to fix it.

2) turbo mode: this is a more major issue. sysctl reports the
following for all four cores:

dev.cpu.0.cx_lowest: C2
dev.cpu.0.cx_supported: C1/1/0 C2/2/400
dev.cpu.0.freq_levels: 2100/4717 1800/3450 1400/2320
dev.cpu.0.freq: 2100

>From the intel CPUs w/ turbo mode I had before I know that there
should be (at least) a 2101 frequency indicating the turbo clock. This
frequency is absent, I suspect this means turbo mode does not work.
How can I debug this? I believe also that this AMD chip has multiple
frequencies above the base clock of 2100, so how would that show?

Loaded modules:

Id Refs Address            Size     Name
 1   23 0xffffffff80200000 1e79670  kernel
 2    1 0xffffffff8207b000 384858   zfs.ko
 3    2 0xffffffff82400000 ca38     opensolaris.ko
 4    1 0xffffffff8240d000 22b98    geom_eli.ko
 5    1 0xffffffff82431000 ac60     aesni.ko
 6    1 0xffffffff8243d000 1c520    fuse.ko
 7    1 0xffffffff82621000 358b     ums.ko
 8    1 0xffffffff82625000 223c4    ipfw.ko

I should note that I boot in legacy mode, not EFI.

asl dump available from http://llamapost.net/elitebook.asl

Thanks a lot!

Johannes