From mboxrd@z Thu Jan 1 00:00:00 1970 To: Adrian Cox Cc: linuxppc-dev@lists.linuxppc.org Subject: Re: G3 Upgrade Questions.... References: <37A01A3D.E9A83C73@agelectronics.co.uk> Mime-Version: 1.0 (generated by tm-edit 7.108) Content-Type: text/plain; charset=US-ASCII From: Takayuki Yamaizumi Date: 30 Jul 1999 10:38:52 +0900 In-Reply-To: Adrian Cox's message of "Thu, 29 Jul 1999 10:09:17 +0100" Message-ID: Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: Hi, Adrian, Thanks for your advice, adrian> I'm a little confused by this patch, because it is very different from adrian> Motorola's application note AN1800/D (Programming the Thermal Assist adrian> Unit in the MPC750 Microprocessor). adrian> http://www.mot.com/SPS/PowerPC/teksupport/teklibrary/appnotes/an1800.pdf I've never checked that document, so I download it (but, today I have no spare time for reading, sorry). That patch is based on cpu_temp in the older vger kernel which was commented out in 2.1.119 (or around this version, I remember. And still being commented out in the latest kernel.) and have been created only using Motorola's "PowerPC 750 User's Manual" http://www.mot.com/SPS/PowerPC/library/750_um.pdf as reference. adrian> 1) No calibration. The board vendor is supposed to calibrate the TAU adrian> before shipping the board, then supply the calibration value. I'm not adrian> sure whether Apple do this. adrian> 2) Why all the time spent doing bit reversals? Why not just fix the adrian> broken values in processor.h and test the correct bits to start with? Currently, I don't care about the definition in include/asm-ppc/processor.h, but should be fixed if broken. I also have been confusing why bit reversal is needed for reading "reasonable" value of tempearture. -- Takayuki Yamaizumi Software Development Lab, IBM Japan. E-mail: ty@tokusen.org, ty@kamoi.imasy.or.jp (Home) zumi@yamato.ibm.co.jp (Office) [[ This message was sent via the linuxppc-dev mailing list. Replies are ]] [[ not forced back to the list, so be sure to Cc linuxppc-dev if your ]] [[ reply is of general interest. Please check http://lists.linuxppc.org/ ]] [[ and http://www.linuxppc.org/ for useful information before posting. ]]