Changeset bd571f44 in mainline

Timestamp:

2006-06-01T14:03:21Z (19 years ago)

Author:

Jakub Vana <jakub.vana@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

152b2b0

Parents:

982f0fe

Message:

Misseed clock ticks counting

File:

• arch/ia64/src/drivers/it.c (modified) (2 diffs)

arch/ia64/src/drivers/it.c

@@ -36 +36 @@
 #include <arch/barrier.h>
 #include <time/clock.h>
+#include <arch.h>
 
+
+#define IT_SERVICE_CLOCKS 64
 
 /** Initialize Interval Timer. */
@@ -59 +62 @@
 }
 
+
 /** Process Interval Timer interrupt. */
 void it_interrupt(void)
 {
+        __s64 c;
+        __s64 m;
+        
         eoi_write(EOI);
-        itm_write(itc_read() + IT_DELTA);       /* program next interruption */
+        
+        m=itm_read();
+        
+        while(1)
+        {
+        
+                c=itc_read();
+                c+=IT_SERVICE_CLOCKS;
+
+                m+=IT_DELTA;
+                if(m-c<0)
+                {
+                        CPU->missed_clock_ticks++;
+                }
+                else break;
+        }
+        
+        itm_write(m);
         srlz_d();                               /* propagate changes */
+        
+        
+        
         clock();
         poll_keyboard();