mirror/libcpuid
1
0
Fork 0
mirror of https://github.com/anrieff/libcpuid synced 2025-10-03 11:01:30 +00:00
Code Issues Releases Wiki Activity

Fix P-III Celeron misdetected as plain P-III (misreport id #8)

Browse source 
Reported via http://libcpuid.sourceforge.net/bugreport.php
The test in particular has no brand string, which was causing the
misdetection (as is the case with a lot of other models, libcpuid
relies on accurate brand string being programmed by the BIOS in
order to do the detection).

The actual CPU was a Pentium-III based Celeron (SL54Q), but it
was detected as "Pentium III (Coppermine)".

A bit of historical trivia: for the related Tualatin models, if
the BIOS doesn't enter a brand string, there might be NO WAY to
tell a regular P-3 and a P-3 Celeron apart: P-3s have variants
with 256KiB and 512KiB L2 cache, while the Celerons are 256 KiB, so
a 256KiB regular P3 is no different than its corresponding Celeron.
Only the FSB is different, but there's no way to detect this via
CPUID.

For the Coppermines its an easier case: Celerons are always 128KiB,
and Pentia are 256KiB, so I've added this distinction in the tables.
This commit is contained in:
Veselin Georgiev 2018-05-02 10:22:00 +03:00
commit 45d04a9e4a
2 changed files with 107 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

12
libcpuid/recog_intel.c
View file

@ -60,6 +60,7 @@ enum _intel_model_t {
typedef enum _intel_model_t intel_model_t;
const struct match_entry_t cpudb_intel[] = {
// F M S EF EM #cores L2$ L3$ BC ModelBits ModelCode Name
{ -1, -1, -1, -1, -1, 1, -1, -1, NC, 0 , 0, "Unknown Intel CPU" },
/* i486 */
@ -107,17 +108,18 @@ const struct match_entry_t cpudb_intel[] = {
{ 6, 8, -1, -1, -1, 1, -1, -1, NC, 0 , 0, "Pentium III (Coppermine)"},
{ 6, 10, -1, -1, -1, 1, -1, -1, NC, 0 , 0, "Pentium III (Coppermine)"},
{ 6, 11, -1, -1, -1, 1, -1, -1, NC, 0 , 0, "Pentium III (Tualatin)" },
{ 6, 11, -1, -1, -1, 1, 512, -1, NC, 0 , 0, "Pentium III (Tualatin)" },
{ 6, 7, -1, -1, -1, 1, -1, -1, NC, XEON_ , 0, "P-III Xeon (Tanner)" },
{ 6, 8, -1, -1, -1, 1, -1, -1, NC, XEON_ , 0, "P-III Xeon (Cascades)" },
{ 6, 10, -1, -1, -1, 1, -1, -1, NC, XEON_ , 0, "P-III Xeon (Cascades)" },
{ 6, 11, -1, -1, -1, 1, -1, -1, NC, XEON_ , 0, "P-III Xeon (Tualatin)" },
{ 6, 7, -1, -1, -1, 1, -1, -1, NC, CELERON_ , 0, "P-III Celeron (Katmai)" },
{ 6, 8, -1, -1, -1, 1, -1, -1, NC, CELERON_ , 0, "P-III Celeron (Coppermine)" },
{ 6, 10, -1, -1, -1, 1, -1, -1, NC, CELERON_ , 0, "P-III Celeron (Coppermine)" },
{ 6, 11, -1, -1, -1, 1, -1, -1, NC, CELERON_ , 0, "P-III Celeron (Tualatin)" },
{ 6, 7, -1, -1, -1, 1, 128, -1, NC, CELERON_ , 0, "P-III Celeron (Katmai)" },
{ 6, 8, -1, -1, -1, 1, 128, -1, NC, CELERON_ , 0, "P-III Celeron (Coppermine)" },
{ 6, 10, -1, -1, -1, 1, 128, -1, NC, CELERON_ , 0, "P-III Celeron (Coppermine)" },
{ 6, 11, -1, -1, -1, 1, 256, -1, NC, CELERON_ , 0, "P-III Celeron (Tualatin)" },
/* Netburst based (Pentium 4 and later)
classic P4s */
{ 15, -1, -1, -1, -1, 1, -1, -1, NC, 0 , 0, "Unknown Pentium 4" },