PERFORCE change 79246 for review
Peter Wemm
peter at FreeBSD.org
Thu Jun 30 06:02:40 GMT 2005
http://perforce.freebsd.org/chv.cgi?CH=79246
Change 79246 by peter at peter_overcee on 2005/06/30 06:02:12
It helps to initialize the variable. I don't know what happened
to the original version.
Affected files ...
.. //depot/projects/hammer/sys/i386/i386/identcpu.c#23 edit
Differences ...
==== //depot/projects/hammer/sys/i386/i386/identcpu.c#23 (text+ko) ====
@@ -172,6 +172,13 @@
}
}
+ /* Detect AMD features (PTE no-execute bit, Long mode etc) */
+ if (strcmp(cpu_vendor, "GenuineIntel") == 0 ||
+ strcmp(cpu_vendor, "AuthenticAMD") == 0) {
+ do_cpuid(0x80000001, regs);
+ amd_feature = regs[3] & ~(cpu_feature & 0x0183f3ff);
+ }
+
if (strcmp(cpu_vendor, "GenuineIntel") == 0) {
if ((cpu_id & 0xf00) > 0x300) {
u_int brand_index;
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