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Diffstat (limited to 'c/src/lib/libbsp/m68k/mvme136/timer/timer.c')
-rw-r--r--c/src/lib/libbsp/m68k/mvme136/timer/timer.c108
1 files changed, 0 insertions, 108 deletions
diff --git a/c/src/lib/libbsp/m68k/mvme136/timer/timer.c b/c/src/lib/libbsp/m68k/mvme136/timer/timer.c
deleted file mode 100644
index 8c3ecd45f2..0000000000
--- a/c/src/lib/libbsp/m68k/mvme136/timer/timer.c
+++ /dev/null
@@ -1,108 +0,0 @@
-/* Timer_init()
- *
- * This routine initializes the Z8036 timer on the MVME136 board.
- *
- * Input parameters: NONE
- *
- * Output parameters: NONE
- *
- * NOTE: This routine will not work if the optimizer is enabled
- * for some compilers. The multiple writes to the Z8036
- * may be optimized away.
- *
- * It is important that the timer start/stop overhead be
- * determined when porting or modifying this code.
- *
- * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
- * On-Line Applications Research Corporation (OAR).
- * All rights assigned to U.S. Government, 1994.
- *
- * This material may be reproduced by or for the U.S. Government pursuant
- * to the copyright license under the clause at DFARS 252.227-7013. This
- * notice must appear in all copies of this file and its derivatives.
- *
- * $Id$
- */
-
-
-#include <rtems.h>
-#include <bsp.h>
-#include <z8036.h>
-
-#define TIMER 0xfffb0000 /* address of Z8036 on MVME136 */
-
-int Ttimer_val;
-rtems_boolean Timer_driver_Find_average_overhead;
-
-rtems_isr timerisr();
-
-void Timer_initialize()
-{
- (void) set_vector( timerisr, 66, 0 ); /* install ISR */
-
- Ttimer_val = 0; /* clear timer ISR count */
- Z8x36_WRITE( TIMER, MASTER_INTR, 0x01 ); /* reset */
- Z8x36_WRITE( TIMER, MASTER_INTR, 0x00 ); /* clear reset */
- Z8x36_WRITE( TIMER, MASTER_INTR, 0xe2 ); /* disable lower chain, no vec */
- /* set right justified addr */
- /* and master int enable */
- Z8x36_WRITE( TIMER, CT1_MODE_SPEC, 0x80 ); /* T1 continuous, and */
- /* cycle/pulse output */
-
- *((rtems_unsigned16 *)0xfffb0016) = 0x0000; /* write countdown value */
-/*
- Z8x36_WRITE( TIMER, CT1_TIME_CONST_MSB, 0x00 );
- Z8x36_WRITE( TIMER, CT1_TIME_CONST_LSB, 0x00 );
-*/
- Z8x36_WRITE( TIMER, MASTER_CFG, 0xc4 ); /* enable timer1 */
-
- Z8x36_WRITE( TIMER, CT1_CMD_STATUS, 0xc6 ); /* set INTR enable (IE), */
- /* trigger command */
- /* (TCB) and gate */
- /* command (GCB) bits */
- *((rtems_unsigned8 *)0xfffb0038) &= 0xfd; /* enable timer INTR on */
- /* VME controller */
-}
-
-#define AVG_OVERHEAD 6 /* It typically takes 3.0 microseconds */
- /* (6 countdowns) to start/stop the timer. */
-#define LEAST_VALID 10 /* Don't trust a value lower than this */
-
-int Read_timer()
-{
-/*
- rtems_unsigned8 msb, lsb;
-*/
- rtems_unsigned32 remaining, total;
-
- Z8x36_WRITE( TIMER, CT1_CMD_STATUS, 0xce ); /* read the counter value */
-remaining = 0xffff - *((rtems_unsigned16 *) 0xfffb0010);
-/*
- Z8x36_READ( TIMER, CT1_CUR_CNT_MSB, msb );
- Z8x36_READ( TIMER, CT1_CUR_CNT_LSB, lsb );
-
- remaining = 0xffff - ((msb << 8) + lsb);
-*/
- total = (Ttimer_val * 0x10000) + remaining;
-
- if ( Timer_driver_Find_average_overhead == 1 )
- return total; /* in one-half microsecond units */
-
- else {
- if ( total < LEAST_VALID )
- return 0; /* below timer resolution */
- return (total-AVG_OVERHEAD) >> 1;
- }
-}
-
-rtems_status_code Empty_function( void )
-{
- return RTEMS_SUCCESSFUL;
-}
-
-void Set_find_average_overhead(
- rtems_boolean find_flag
-)
-{
- Timer_driver_Find_average_overhead = find_flag;
-}