git-svn-id: https://spexeah.com:8443/svn/Asuro@655 6dbc8c32-bb84-406f-8558-d1cf31a0ab0c

src/cpu.pas

@@ -78,6 +78,7 @@ type
     end;
     TClockSpeed = record
         Hz  : uint32;
+        KHz : uint32;
         MHz : uint32;
         GHz : uint32;
     end;
@@ -154,19 +155,24 @@ end;
 procedure getCPUClockSpeed;
 var
     t1, t2 : TDateTime;
+    c1, c2 : uint64;
     c : uint32;
     
-
 begin
     c:= 0;
-    t1:= getDateTime;
-    t2:= getDateTime;
-    while (t1.Seconds = t2.Seconds) do begin
-        inc(c);
+    if CPUID.Capabilities0^.TSC then begin
+        t1:= getDateTime;
         t2:= getDateTime;
+        c1:= getTSC;
+        while (t1.Seconds = t2.Seconds) do begin
+            t2:= getDateTime;
+        end;
+        c2:= getTSC;
+        c:= c2 - c1;
     end;
     CPUID.ClockSpeed.Hz:= c;
-    CPUID.ClockSpeed.MHz:= CPUID.ClockSpeed.Hz div 1000;
+    CPUID.ClockSpeed.KHz:= CPUID.ClockSpeed.Hz div 1000;
+    CPUID.ClockSpeed.MHz:= CPUID.ClockSpeed.KHz div 1000;
     CPUID.ClockSpeed.GHz:= CPUID.ClockSpeed.MHz div 1000;
 end;
 

src/include/util.pas

@@ -49,6 +49,7 @@ procedure sleep(seconds : uint32);
 function get16bitcounter : uint16;
 function get32bitcounter : uint32;
 function get64bitcounter : uint64;
+function getTSC : uint64;
 
 function BCDToUint8(bcd : uint8) : uint8;
 
@@ -358,6 +359,23 @@ begin
     get64bitcounter:= bios_data_area.Counters.c64;
 end;
 
+function getTSC : uint64;
+var
+    hi, lo : uint32;
+
+begin
+    asm
+        PUSH EAX
+        PUSH EDX
+        RDTSC
+        MOV hi, EDX
+        MOV lo, EAX
+        POP EDX
+        POP EAX
+    end;
+    getTSC:= (hi SHL 32) OR lo;
+end;
+
 procedure BSOD(fault : pchar; info : pchar);
 var
     trace : pchar;