From 39cafa5c1512073cfd998bc13d4d8daa7e734924 Mon Sep 17 00:00:00 2001
From: Joel Sherrill <joel.sherrill@OARcorp.com>
Date: Tue, 15 Oct 1996 21:39:06 +0000
Subject: updated to format of 3.6.0 clock drivers

---
 c/src/lib/libbsp/i386/i386ex/clock/ckinit.c | 107 +++++++++++++++++++++-------
 1 file changed, 83 insertions(+), 24 deletions(-)

(limited to 'c/src/lib/libbsp/i386')

diff --git a/c/src/lib/libbsp/i386/i386ex/clock/ckinit.c b/c/src/lib/libbsp/i386/i386ex/clock/ckinit.c
index 1d43059ac2..7352ee27b8 100644
--- a/c/src/lib/libbsp/i386/i386ex/clock/ckinit.c
+++ b/c/src/lib/libbsp/i386/i386ex/clock/ckinit.c
@@ -21,33 +21,44 @@
  */
 
 #include <bsp.h>
-#include <clockdrv.h>
+
+#include <rtems/libio.h>
+
 #include <stdlib.h>
 
-volatile rtems_unsigned32 Clock_driver_ticks;
+#define CLOCK_VECTOR 0x20
+
 rtems_unsigned32 Clock_isrs;              /* ISRs until next tick */
+
+volatile rtems_unsigned32 Clock_driver_ticks;
+
 rtems_isr_entry  Old_ticker;
 
-rtems_device_driver Clock_initialize(
-  rtems_device_major_number major,
-  rtems_device_minor_number minor,
-  void *pargp,
-  rtems_id tid,
-  rtems_unsigned32 *rval
-)
-{
-  Install_clock( Clock_isr );
-}
+void Clock_exit( void );
 
-void ReInstall_clock(
-  rtems_isr_entry clock_isr
+/*
+ * These are set by clock driver during its init
+ */
+ 
+rtems_device_major_number rtems_clock_major = ~0;
+rtems_device_major_number rtems_clock_minor = 0;
+
+/*
+ *  This is the ISR handler.
+ */
+
+rtems_isr Clock_isr(
+  rtems_vector_number vector
 )
 {
-  rtems_unsigned32 isrlevel = 0;
-
-  rtems_interrupt_disable( isrlevel );
-   (void) set_vector( clock_isr, 0x20, 1 ); /* was 0x38 */
-  rtems_interrupt_enable( isrlevel );
+  /* enable_tracing(); */
+  Clock_driver_ticks += 1;
+  if ( Clock_isrs == 1 ) {
+    rtems_clock_tick();
+    Clock_isrs = BSP_Configuration.microseconds_per_tick / 1000;
+  }
+  else
+    Clock_isrs -= 1;
 }
 
 void Install_clock(
@@ -58,8 +69,7 @@ void Install_clock(
   Clock_isrs = BSP_Configuration.microseconds_per_tick / 1000;
 
   if ( BSP_Configuration.ticks_per_timeslice ) {
-    Old_ticker = ( rtems_isr_entry ) set_vector( clock_isr, 0x20, 1 ); 
-                                                     /* was 0x38 */
+    Old_ticker = ( rtems_isr_entry ) set_vector( clock_isr, CLOCK_VECTOR, 1 );
 
 /*  The following is already set up in interns.s -> 
     ( This is test code only... production code will move the 
@@ -85,9 +95,58 @@ void Install_clock(
 void Clock_exit( void )
 {
   if ( BSP_Configuration.ticks_per_timeslice ) {
-/*     outport_byte( TBCR, 0x00 ); */ /* initial value */
-/*    outport_byte( IERA, 0x40 ); */ /* disable interrupt */
-/* ??? Is "do not restore old vector" causing problems? */
+     /* should do something here */;
   }
 }
 
+
+rtems_device_driver Clock_initialize(
+  rtems_device_major_number major,
+  rtems_device_minor_number minor,
+  void *pargp
+)
+{
+  Install_clock( Clock_isr );
+
+  /*
+   * make major/minor avail to others such as shared memory driver
+   */
+ 
+  rtems_clock_major = major;
+  rtems_clock_minor = minor;
+ 
+  return RTEMS_SUCCESSFUL;
+}
+
+rtems_device_driver Clock_control(
+  rtems_device_major_number major,
+  rtems_device_minor_number minor,
+  void *pargp
+)
+{
+    rtems_unsigned32 isrlevel;
+    rtems_libio_ioctl_args_t *args = pargp;
+ 
+    if (args == 0)
+        goto done;
+ 
+    /*
+     * This is hokey, but until we get a defined interface
+     * to do this, it will just be this simple...
+     */
+ 
+    if (args->command == rtems_build_name('I', 'S', 'R', ' '))
+    {
+        Clock_isr(CLOCK_VECTOR);
+    }
+    else if (args->command == rtems_build_name('N', 'E', 'W', ' '))
+    {
+      rtems_interrupt_disable( isrlevel );
+       (void) set_vector( args->buffer, CLOCK_VECTOR, 1 );
+      rtems_interrupt_enable( isrlevel );
+    }
+ 
+done:
+    return RTEMS_SUCCESSFUL;
+}
+
-- 
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