Changeset 31fe820 in rtems

Timestamp:

Jun 21, 2007, 10:45:05 PM (12 years ago)

Author:

Joel Sherrill <joel.sherrill@…>

Branches:

4.10, 4.11, 4.8, 4.9, master

Children:

3aa0564

Parents:

d3b05790

Message:

2007-06-21 Joel Sherrill <joel.sherrill@…>

• clock/clock.c: Add nanoseconds since last tick support.

Location:

c/src/lib/libbsp/powerpc/gen5200

Files:

• ChangeLog (modified) (1 diff)
• clock/clock.c (modified) (6 diffs)

c/src/lib/libbsp/powerpc/gen5200/ChangeLog

@@ +1 @@
+2007-06-21      Joel Sherrill <joel.sherrill@oarcorp.com>
+
+        * clock/clock.c: Add nanoseconds since last tick support.
+
 2007-06-20      Joel Sherrill <joel.sherrill@oarcorp.com>
 

c/src/lib/libbsp/powerpc/gen5200/clock/clock.c

@@ -127 +127 @@
 
 
+uint64_t Clock_last_TBR;
+
 /*
  *  ISR Handlers
@@ -142 +144 @@
 
     gpt->status |= GPT_STATUS_TEXP;
+    Clock_last_TBR = PPC_Get_timebase_register();
 
 
@@ -187 +190 @@
   }
 
+uint32_t bsp_clock_nanoseconds_since_last_tick(void)
+{
+  uint64_t new_tbr;
+  uint64_t bus_cycles;
+  uint32_t nsecs;
+
+  new_tbr = PPC_Get_timebase_register();
+  bus_cycles = (new_tbr - Clock_last_TBR) * 4;
+  nsecs =  (uint32_t) (bus_cycles / (XLB_CLOCK / 1000000)) * 1000;
+
+  return nsecs;
+}
 
 /*
@@ -196 +211 @@
 
   gpt->emsel |= GPT_EMSEL_CE | GPT_EMSEL_INTEN;
+  Clock_last_TBR = PPC_Get_timebase_register();
 
   }
@@ -227 +243 @@
   {
   uint32_t gpt_no;
-
 
   gpt_no = BSP_SIU_IRQ_TMR0 - (irq->name);
@@ -376 +391 @@
   ClockInitialized = 1;
 
+    rtems_clock_set_nanoseconds_extension(
+      bsp_clock_nanoseconds_since_last_tick
+    );
   atexit(Clock_exit);