Re: [PATCH] Processor autodetection (when configuring kernel)

From: David Relson (relson@osagesoftware.com)
Date: Fri Dec 29 2000 - 09:09:01 EST


Giacomo,

I don't think cpu_info.sh is quite right. It identified my 500 Mhz Pentium
III as CONFIG_M386. I think CONFIG_M686 is closer, but as I don't know the
significance of all the flags (MMX, TSC, etc), I'm not certain. Since the
flags do include fxsr, the correct answer may be CONFIG_M686FXSR.

Anyhow, here are my results:

[relson@osage relson]$ cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 7
model name : Pentium III (Katmai)
stepping : 3
cpu MHz : 501.147
cache size : 512 KB
fdiv_bug : no
hlt_bug : no
sep_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat pse36
mmx fxsr xmm
bogomips : 999.42

[relson@osage relson]$ ARCH=i386 ; . cpu_detect.sh
GenuineIntel:6:7
CONFIG_M386

Also, here's a patch to make the script echo CONFIG_M686:

diff -urN cpu_detect.sh.orig cpu_detect.sh
--- cpu_detect.sh.orig Fri Dec 29 09:02:27 2000
+++ cpu_detect.sh Fri Dec 29 09:01:14 2000
@@ -18,7 +18,7 @@
    case $cpu_id in
      GenuineIntel:5:[0123] ) echo CONFIG_M586TSC ;;
      GenuineIntel:5:[48] ) echo CONFIG_M586MMX ;;
- GenuineIntel:6:[01356] ) echo CONFIG_M686 ;;
+ GenuineIntel:6:[013567] ) 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 ;;

David

P.S. I'm running 2.2.18, if it matters.
--------------------------------------------------------
David Relson Osage Software Systems, Inc.
relson@osagesoftware.com Ann Arbor, MI 48103
www.osagesoftware.com tel: 734.821.8800

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