Date: Wed, 5 May 2010 15:43:12 +0900 From: Norikatsu Shigemura <nork@FreeBSD.org> To: jkim@FreeBSD.org Cc: nork@FreeBSD.org, current@FreeBSD.org Subject: amdtemp(4) issue Message-ID: <20100505154312.49e7a2cc.nork@FreeBSD.org>
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Hi jkim.
I can't get CPU temperature via amdtemp(4). So I researched, but
I can't fix this issue, maybe initialization problem. Please help
me!
1st issue in amdtemp_gettemp function:
now: offset += (diode_offset - 11) * 10; is BAD
should fix: offset += (11 - diode_offset) * 10; is OK
According to AMD's BIOS and Kernel Developer's Guid (BKDG) For
AMD Family 10th Processors, Rev 3.48 - April 22, 2010 [*],
P327 - F3xE4 Thermtrip Status Register:
01h to 3Fh: correction = +11C - DiodeOffset, or {01h to 3Fh} = {+10C to -52C}.
In fact, in my environment, DiodeOffset = 0x18 so 11-0x18=-13C.
11 - 0x01 = +10C
11 - 0x18 = -13C
11 - 0x3f = -52C
[*] http://support.amd.com/us/Processor_TechDocs/31116.pdf
2nd issue, result of AMDTEMP_REPTMP_CTRL in amdtemp_gettemp function:
I got following result:
May 5 15:06:53 nadesico kernel: amdtemp0: AMDTEMP_REPTMP_CTRL(temp) = 0xc1880
So result (CurTmp: current temperature: 31:21) = 0C. (logic is OK)
I got following thermal related registers in amdtemp_gettemp function:
May 5 15:06:53 nadesico kernel: amdtemp0: F3x64 Hardware Thermal Control(HTC) Register = 0x3a4c0005
May 5 15:06:53 nadesico kernel: amdtemp0: F3x68 Software Thermal Control(STC) Register = 0x10000000
May 5 15:06:53 nadesico kernel: amdtemp0: F3xA4 Reported Temperature Control Register = 0x000c1880
May 5 15:06:53 nadesico kernel: amdtemp0: F3xE4 Thermtrip Status Register = 0x1cc01830
May 5 15:06:53 nadesico kernel: amdtemp0: F3xE8 Northbridge Capabilities Register = 0x0207df19
But I don't have any idea to fix register's paraemters. Do you
have any idea?
--
Norikatsu Shigemura <nork@FreeBSD.org>
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