Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 29 Dec 2000 09:13:12 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 29 Dec 2000 09:13:02 -0500 Received: from dubb05h09-0.dplanet.ch ([212.35.36.9]:57863 "EHLO duba02h02-0.dplanet.ch") by vger.kernel.org with ESMTP id ; Fri, 29 Dec 2000 09:12:46 -0500 Message-ID: <3A4C941E.EA824F87@student.ethz.ch> Date: Fri, 29 Dec 2000 14:39:42 +0100 From: "Giacomo A. Catenazzi" X-Mailer: Mozilla 4.76 [en] (X11; U; Linux 2.4.0-test12 i586) X-Accept-Language: en MIME-Version: 1.0 To: torvalds@transmeta.com CC: linux-kernel@vger.kernel.org, linux-kbuild@torque.net Subject: [PATCH] Processor autodetection (when configuring kernel) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi Linus! Here a first try to autodetect the processor when configure kernel. How it works: 1) I add a CONFIG_CPU_CURRENT boolean. 2) If it is set, the next Makefile will call script/cpu_detect.sh and try to detect the processor (it return CONFIG_M386 if it fails) 3) Makefile sets the autodetected processor and CONFIG_CPU_CURRENT=n, so next time it will use the already detected CPU 4) it does a make oldconfig to configure the the other processor flags ( and to be sure that it will be a correct configuration file) 4) The GNU make will automagically restart makefile, bacause and include (include .config) is changed. I don't know well the non-intel processors, so addition for extra processors are welcome. giacomo The patch ========= diff -urN old.linux/Makefile linux/Makefile --- old.linux/Makefile Fri Dec 29 11:26:55 2000 +++ linux/Makefile Fri Dec 29 13:32:10 2000 @@ -65,6 +65,16 @@ do-it-all: config endif +# Second stage configuration +# Note that GNU make will read again this Makefile, so the CONFIG are +# updated +ifeq ($(CONFIG_CPU_CURRENT), y) +CONFIGURATION = config2 +do-it-all: config2 +.config: config2 + @echo "Rescanning the main Makefile" +endif + # # INSTALL_PATH specifies where to place the updated kernel and system map # images. Uncomment if you want to place them anywhere other than root. @@ -273,6 +283,14 @@ config: symlinks $(CONFIG_SHELL) scripts/Configure arch/$(ARCH)/config.in + +config2: + echo "CONFIG_CPU_CURRENT=n" >> .config + echo `$(CONFIG_SHELL) $(TOPDIR)/scripts/cpu_detect.sh`=y >> .config + $(MAKE) oldconfig + +config2.test: + echo "CONFIG_CPU_CURRENT=$(CONFIG_CPU_CURRENT)" include/config/MARKER: scripts/split-include include/linux/autoconf.h scripts/split-include include/linux/autoconf.h include/config diff -urN old.linux/arch/i386/config.in linux/arch/i386/config.in --- old.linux/arch/i386/config.in Fri Dec 29 11:26:55 2000 +++ linux/arch/i386/config.in Fri Dec 29 13:14:58 2000 @@ -26,7 +26,9 @@ mainmenu_option next_comment comment 'Processor type and features' -choice 'Processor family' \ +bool "Optimize for current CPU" CONFIG_CPU_CURRENT +if [ "$CONFIG_CPU_CURRENT" != "y" ]; then + choice 'Processor family' \ "386 CONFIG_M386 \ 486 CONFIG_M486 \ 586/K5/5x86/6x86/6x86MX CONFIG_M586 \ @@ -41,6 +43,10 @@ Winchip-C6 CONFIG_MWINCHIPC6 \ Winchip-2 CONFIG_MWINCHIP2 \ Winchip-2A/Winchip-3 CONFIG_MWINCHIP3D" Pentium-Pro +else + # First configuration stage: Allow all possible processors deps + define_bool CONFIG_M386 y +fi # # Define implied options from the CPU selection here # diff -urN old.linux/scripts/cpu_detect.sh linux/scripts/cpu_detect.sh --- old.linux/scripts/cpu_detect.sh Thu Jan 1 01:00:00 1970 +++ linux/scripts/cpu_detect.sh Fri Dec 29 14:10:42 2000 @@ -0,0 +1,35 @@ +#! /bin/bash + +# Copyright (C) 2000 Giacomo Catenazzi +# This is free software, see GNU General Public License 2 for details. + +# This script try to autodetect the CPU. +# On SMP I assume that all processors are of the same type as the first + + +if [ "$ARCH" = "i386" ] ; then + vendor=$(sed -n 's/^vendor_id.*: \([-A-Za-z0-9_]*\).*$/\1/pg' /proc/cpuinfo) + cpu_fam=$(sed -n 's/^cpu family.*: \([0-9A-Za-z]*\).*$/\1/pg' /proc/cpuinfo) + cpu_mod=$(sed -n 's/^model[^a-z]*: \([0-9A-Za-z]*\).*$/\1/pg' /proc/cpuinfo) + cpu_id="$vendor:$cpu_fam:$cpu_mod" + + #echo $cpu_id # for debug + + case $cpu_id in + GenuineIntel:5:[0123] ) echo CONFIG_M586TSC ;; + GenuineIntel:5:[48] ) echo CONFIG_M586MMX ;; + GenuineIntel:6:[01356] ) echo CONFIG_M686 ;; + GenuineIntel:6:{8,9,11} ) echo CONFIG_M686FXSR ;; + AuthenticAMD:5:[0123] ) echo CONFIG_M586 ;; + AuthenticAMD:5:{8,9,10,11} ) echo CONFIG_MK6 ;; + AuthenticAMD:6:[0124] ) echo CONFIG_MK7 ;; + UMC:4:[12] ) echo CONFIG_M486 ;; # "UMC" ! + NexGenDriven:5:0 ) echo CONFIG_M386 ;; + {TransmetaCPU,GenuineTMx86}:* ) echo CONFIG_MCROSUE ;; + + # some default values + + * ) echo CONFIG_M386 ;; + + esac +fi diff -urN old.linux/CREDITS linux/CREDITS --- old.linux/CREDITS Fri Dec 29 13:32:46 2000 +++ linux/CREDITS Fri Dec 29 13:43:02 2000 @@ -458,6 +458,12 @@ S: Fremont, California 94539 S: USA +N: Giacomo Catenazzi +E: cate@debian.org +D: Random kernel hack and fixes +D: Author of scripts/cpu_detect.sh +S: Switzerland + N: Gordon Chaffee E: chaffee@cs.berkeley.edu W: http://bmrc.berkeley.edu/people/chaffee/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/