Date: Wed, 5 May 2010 15:09:58 -0400 From: Jung-uk Kim <jkim@FreeBSD.org> To: Norikatsu Shigemura <nork@FreeBSD.org> Cc: freebsd-current@FreeBSD.org Subject: Re: amdtemp(4) issue Message-ID: <201005051510.00470.jkim@FreeBSD.org> In-Reply-To: <201005051351.15012.jkim@FreeBSD.org> References: <20100505154312.49e7a2cc.nork@FreeBSD.org> <201005051351.15012.jkim@FreeBSD.org>
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On Wednesday 05 May 2010 01:51 pm, Jung-uk Kim wrote: > On Wednesday 05 May 2010 02:43 am, Norikatsu Shigemura wrote: > > 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 > > AMD keeps flipping the sign from core to core. :-( Please see > AMDTEMP_FLAG_DO_SIGN for Family 0Fh, for example. In fact, Linux > driver (k10temp) does not care about the DiodeOffset at all. > Instead, they just say "input" temperature. > > > 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? > > Sorry, I don't. You may find Linux k10temp driver > (drivers/hwmon/k10temp.c) useful, though. Actually more useful reference code for us would be kate(4)/km(4) from OpenBSD and amdtemp(4) from NetBSD: http://www.openbsd.org/cgi-bin/cvsweb/src/sys/dev/pci/kate.c http://www.openbsd.org/cgi-bin/cvsweb/src/sys/dev/pci/km.c http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/arch/x86/pci/amdtemp.c Jung-uk Kim
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