Date: Mon, 27 Aug 2001 14:59:34 -0400 From: Allen Landsidel <all@biosys.net> To: freebsd-stable@freebsd.org Subject: identcpu patch for k6-2? Message-ID: <5.1.0.14.0.20010827131809.00c4ad38@rfnj.org>
next in thread | raw e-mail | index | archive | help
Since as long as I can remember.. 3.4 or so at least, identcpu.c has
incorrectly identified my K6-2 as a K6. After looking into
/usr/src/sys/i386/i386/identcpu.c I notice that it apparently gets the CPU
ID information and then subsequently overwrites it with something else.
I made some minor changes that are entirely cosmetic, nothing really
functionally different that I saw, and it now displays the proper CPU type.
Unfortunately this screws up the CPU detection on my Athlon (it reports as
Unknown). I'm sure there is a way to do this.. having done cpu
identification myself (in asm and delphi/pascal, not c) I'm pretty sure
that even though the K6-2s report that they support the extended cpuid
instruction to report their CPU name string, that the string is K6 and not
a K6-2.
I could just be smoking crack though too.. here is the patch I applied,
it's pretty simple, but apparently screws things up sometimes. I didn't
try it on my P-133 yet..
Maybe someone could take a closer look at this and see what's up? I'm
fighting through trying to get the identcpu.c code into a standalone format
that I can compile and just get the raw cpuid output, but my C is just
plain terrible.. maybe I'll grab the freepascal compiler and try that. ;)
[root@revolution] /root # diff -cu identcpu.c identcpu.patched.c
diff: conflicting specifications of output style
--- identcpu.c Mon Aug 27 13:12:15 2001
+++ identcpu.patched.c Mon Aug 27 13:13:23 2001
@@ -86,7 +86,7 @@
SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD,
machine, 0, "Machine class");
-static char cpu_model[128];
+static char cpu_model[144];
SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD,
cpu_model, 0, "Machine model");
@@ -329,11 +329,11 @@
nreg = regs[0];
if (nreg >= 0x80000004) {
do_cpuid(0x80000002, regs);
- memcpy(cpu_model, regs, sizeof regs);
- do_cpuid(0x80000003, regs);
memcpy(cpu_model+16, regs, sizeof regs);
- do_cpuid(0x80000004, regs);
+ do_cpuid(0x80000003, regs);
memcpy(cpu_model+32, regs, sizeof regs);
+ do_cpuid(0x80000004, regs);
+ memcpy(cpu_model+48, regs, sizeof regs);
}
} else if (strcmp(cpu_vendor,"CyrixInstead") == 0) {
strcpy(cpu_model, "Cyrix ");
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-stable" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?5.1.0.14.0.20010827131809.00c4ad38>