Changeset 3a4ae6c in rtems for c/src/lib/libbsp/m68k/mvme136/clock

Timestamp:

09/11/95 19:35:39 (27 years ago)

Author:

Joel Sherrill <joel.sherrill@…>

Branches:

4.10, 4.11, 4.8, 4.9, 5, master

Children:

ced11f99

Parents:

5072b07

Message:

The word "RTEMS" almost completely removed from the core.

Configuration Table Template file added and all tests
modified to use this. All gvar.h and conftbl.h files
removed from test directories.

Configuration parameter maximum_devices added.

Core semaphore and mutex handlers added and RTEMS API Semaphore
Manager updated to reflect this.

Initialization sequence changed to invoke API specific initialization
routines. Initialization tasks table now owned by RTEMS Tasks Manager.

Added user extension for post-switch.

Utilized user extensions to implement API specific functionality
like signal dispatching.

Added extensions to the System Initialization Thread so that an
API can register a function to be invoked while the system
is being initialized. These are largely equivalent to the
pre-driver and post-driver hooks.

Added the Modules file oar-go32_p5, modified oar-go32, and modified
the file make/custom/go32.cfg to look at an environment varable which
determines what CPU model is being used.

All BSPs updated to reflect named devices and clock driver's IOCTL
used by the Shared Memory Driver. Also merged clock isr into
main file and removed ckisr.c where possible.

Updated spsize to reflect new and moved variables.

Makefiles for the executive source and include files updated to show
break down of files into Core, RTEMS API, and Neither.

Header and inline files installed into subdirectory based on whether
logically in the Core or a part of the RTEMS API.

File:

• c/src/lib/libbsp/m68k/mvme136/clock/ckinit.c (modified) (4 diffs)

c/src/lib/libbsp/m68k/mvme136/clock/ckinit.c

@@ -21 +21 @@
 #include <stdlib.h>
 
-#include <rtems.h>
 #include <bsp.h>
-#include <clockdrv.h>
+#include <rtems/libio.h>
 #include <z8036.h>
 
@@ -36 +35 @@
                                     /*   and trigger countdown */
 
+#define TIMER        0xfffb0000
+#define RELOAD       0x24            /* clr IP & IUS,allow countdown */
+ 
+#define CLOCK_VECTOR 66
+
 rtems_unsigned32 Clock_isrs;        /* ISRs until next tick */
-volatile rtems_unsigned32 Clock_driver_ticks;
-                                    /* ticks since initialization */
+
+volatile rtems_unsigned32 Clock_driver_ticks; /* ticks since initialization */
+
 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
+void Clock_exit( void );
+
+/*
+ * These are set by clock driver during its init
+ */
+ 
+rtems_device_major_number rtems_clock_major = ~0;
+rtems_device_minor_number rtems_clock_minor;
+ 
+/*
+ *  ISR Handler
+ */
+ 
+rtems_isr Clock_isr(
+  rtems_vector_number vector
 )
 {
-  Install_clock( Clock_isr );
-}
+  Clock_driver_ticks += 1;
+  ((volatile struct z8036_map *) TIMER)->CT1_CMD_STATUS = RELOAD;
 
-void ReInstall_clock(
-  rtems_isr_entry clock_isr
-)
-{
-  rtems_unsigned32 isrlevel;
-
-  rtems_interrupt_disable( isrlevel );
-   (void) set_vector( clock_isr, 66, 1 );
-  rtems_interrupt_enable( isrlevel );
+  if ( Clock_isrs == 1 ) {
+    rtems_clock_tick();
+    Clock_isrs = BSP_Configuration.microseconds_per_tick / 1000;
+  }
+  else
+    Clock_isrs -= 1;
 }
 
@@ -73 +84 @@
 
   if ( BSP_Configuration.ticks_per_timeslice ) {
-    Old_ticker = (rtems_isr_entry) set_vector( clock_isr, 66, 1 );
+    Old_ticker = (rtems_isr_entry) set_vector( clock_isr, CLOCK_VECTOR, 1 );
     timer = (struct z8036_map *) 0xfffb0000;
     timer->MASTER_INTR        = MICRVAL;
     timer->CT1_MODE_SPEC      = T1MSRVAL;
 
-  *((rtems_unsigned16 *)0xfffb0016) = MS_COUNT;  /* write countdown value */
-/*
-    timer->CT1_TIME_CONST_MSB = (MS_COUNT >> 8);
-    timer->CT1_TIME_CONST_LSB = (MS_COUNT &  0xff);
-*/
+    *((rtems_unsigned16 *)0xfffb0016) = MS_COUNT;  /* write countdown value */
+
+    /*
+     *  timer->CT1_TIME_CONST_MSB = (MS_COUNT >> 8);
+     *  timer->CT1_TIME_CONST_LSB = (MS_COUNT &  0xff);
+     */
+
     timer->MASTER_CFG         = MCCRVAL;
     timer->CT1_CMD_STATUS     = T1CSRVAL;
 
-/*
- * Enable interrupt via VME interrupt mask register
- */
+    /*
+     * Enable interrupt via VME interrupt mask register
+     */
     (*(rtems_unsigned8 *)0xfffb0038) &= 0xfd;
-
 
     atexit( Clock_exit );
   }
 
+}
+
+void ReInstall_clock(
+  rtems_isr_entry clock_isr
+)
+{
+  rtems_unsigned32 isrlevel;
+
+  rtems_interrupt_disable( isrlevel );
+   (void) set_vector( clock_isr, CLOCK_VECTOR, 1 );
+  rtems_interrupt_enable( isrlevel );
 }
 
@@ -110 +133 @@
   }
 }
+
+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_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', ' '))
+    {
+        ReInstall_clock(args->buffer);
+    }
+ 
+done:
+    return RTEMS_SUCCESSFUL;
+}
+