Ticket #3541: haiku_ticket4427_3541_try2_r33411.diff

headers/os/kernel/OS.h

@@ -482 +482 @@
     B_CPU_INTEL_PENTIUM_M_MODEL_13      = 0x106d, /* Dothan */
     B_CPU_INTEL_PENTIUM_CORE,
     B_CPU_INTEL_PENTIUM_CORE_2,
-    B_CPU_INTEL_PENTIUM_CORE_2_EXTREME  = 0x11067, /* Core 2 Extreme or Xeon
-                                                       model 23 on 45 nm */
+    B_CPU_INTEL_PENTIUM_CORE_2_45_NM    = 0x11067, /* Core 2 on 45 nm
+                                                       (Core 2 Extreme,
+                                                       Xeon model 23 or
+                                                       Core 2 Duo/Quad) */
     B_CPU_INTEL_PENTIUM_CORE_I7     = 0x1106a, /* Core i7 920 @ 2.6(6) */
     B_CPU_INTEL_PENTIUM_IV              = 0x10f0,
     B_CPU_INTEL_PENTIUM_IV_MODEL_1,

headers/private/shared/cpu_type.h

@@ -60 +60 @@
 }
 
 
+#ifdef __INTEL__
+char *
+get_cpuid_model_string()
+{
+    /* references:
+     *
+     * http://grafi.ii.pw.edu.pl/gbm/x86/cpuid.html
+     * http://www.sandpile.org/ia32/cpuid.htm
+     * http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/TN13.pdf (Duron erratum)
+     */
+
+    cpuid_info baseInfo;
+    cpuid_info cpuInfo;
+    int32 maxStandardFunction, maxExtendedFunction = 0;
+
+    if (get_cpuid(&baseInfo, 0, 0) != B_OK) {
+        // this CPU doesn't support cpuid
+        return NULL;
+    }
+
+    maxStandardFunction = baseInfo.eax_0.max_eax;
+    if (maxStandardFunction >= 500)
+        maxStandardFunction = 0; /* old Pentium sample chips has cpu signature here */
+
+    /* Extended cpuid */
+
+    get_cpuid(&cpuInfo, 0x80000000, 0); /* hardcoded to CPU 0 */
+
+    // extended cpuid is only supported if max_eax is greater than the service id
+    if (cpuInfo.eax_0.max_eax > 0x80000000)
+        maxExtendedFunction = cpuInfo.eax_0.max_eax & 0xff;
+
+    if (maxExtendedFunction >=4 ) {
+        int32 i;
+        char *name = (char *)calloc(49, sizeof(char));
+        
+        for (i = 0; i < 3; i++) {
+            cpuid_info nameInfo;
+            get_cpuid(&nameInfo, 0x80000002 + i, 0);
+
+            memcpy(name, &nameInfo.regs.eax, 4);
+            memcpy(name + 4, &nameInfo.regs.ebx, 4);
+            memcpy(name + 8, &nameInfo.regs.ecx, 4);
+            memcpy(name + 12, &nameInfo.regs.edx, 4);
+            name += 16;
+        }
+
+        // cut off leading spaces (names are right aligned)
+        name -= 48;
+        return name;
+    }
+
+    return NULL;
+}
+#endif
+
+
 const char *
 get_cpu_model_string(system_info *info)
 {
+    char *cpu;
+
     // Determine CPU type
     switch (info->cpu_type) {
 #if __POWERPC__
@@ -113 +172 @@
             return "Core";
         case B_CPU_INTEL_PENTIUM_CORE_2:
             return "Core 2";
-        case B_CPU_INTEL_PENTIUM_CORE_2_EXTREME:
+        case B_CPU_INTEL_PENTIUM_CORE_2_45_NM:
+            cpu = get_cpuid_model_string();
+            if (cpu != NULL)
+            {
+                if (strcasestr(cpu, "Duo") != NULL ||
+                    strcasestr(cpu, "Quad") != NULL)
+                {
+                    free(cpu);
+                    return "Core 2";
+                }
+                if (strcasestr(cpu, "Xeon") != NULL)
+                {
+                    free(cpu);
+                    return "Core 2 Xeon";
+                }
+                free(cpu);
+            }
             return "Core 2 Extreme";
         case B_CPU_INTEL_PENTIUM_CORE_I7:
             return "Core i7";