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Diffstat (limited to 'c/src/lib/libbsp/m68k/idp/timer/timer.c')
-rw-r--r--c/src/lib/libbsp/m68k/idp/timer/timer.c121
1 files changed, 0 insertions, 121 deletions
diff --git a/c/src/lib/libbsp/m68k/idp/timer/timer.c b/c/src/lib/libbsp/m68k/idp/timer/timer.c
deleted file mode 100644
index 176f393e45..0000000000
--- a/c/src/lib/libbsp/m68k/idp/timer/timer.c
+++ /dev/null
@@ -1,121 +0,0 @@
-/* Timer_init()
- *
- * This routine initializes the MC68230 timer on the Motorola IDP 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 MC68230
- * may be optimized away.
- *
- * It is important that the timer start/stop overhead be
- * determined when porting or modifying this code.
- *
- * Code Modified for the MC68230 by Doug McBride, Colorado Space Grant College
- *
- * 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 "cpu.h"
-#include "bsp.h"
-#include "mc68230.h"
-
-#define TIMER_VECTOR 0x4D
-
-int Ttimer_val;
-rtems_boolean Timer_driver_Find_average_overhead;
-
-rtems_isr timerisr();
-
-void Timer_initialize()
-{
- (void) set_vector( timerisr, TIMER_VECTOR, 0 ); /* install ISR */
-
- Ttimer_val = 0; /* clear timer ISR count */
-
- /* some PI/T initialization stuff here */
- /* Set up the interrupt vector on the MC68230 chip:
- TIVR = TIMER_VECTOR; */
- MC68230_WRITE (TIVR, TIMER_VECTOR);
-
- /* Set CPRH through CPRL to maximum count to reduce interrupt overhead
- CPRH = 0xFF;
- CPRM = 0xFF;
- CPRL = 0xFF; */
- MC68230_WRITE (CPRH, 0xFF);
- MC68230_WRITE (CPRM, 0xFF);
- MC68230_WRITE (CPRL, 0xFF);
-
- /* Enable timer and use it as an external periodic interrupt generator
- TCR = 0xA1; */
- MC68230_WRITE (TCR, 0xA1);
-
-}
-
-#define AVG_OVERHEAD 9 /* may not be right -- do this later */
-#define LEAST_VALID 10 /* Don't trust a value lower than this */
-
-int Read_timer()
-{
- rtems_unsigned8 data;
- rtems_unsigned8 msb, osb, lsb;
- rtems_unsigned32 remaining, total;
-
- /* Disable timer so that timer can be read
- data = TCR;
- TCR = (data & 0xFE); */
- MC68230_READ (TCR, data);
- MC68230_WRITE (TCR, (data & 0xFE));
-
- /* Read the counter value
- msb = CNTRH;
- osb = CNTRM;
- lsb = CNTRL; */
- MC68230_READ (CNTRH, msb);
- MC68230_READ (CNTRM, osb);
- MC68230_READ (CNTRL, lsb);
-
- /* Calculate the time so far */
- remaining = 0x1000000 - ((msb << 16) + (osb << 8) + lsb);
- total = (Ttimer_val * 0x1000000) + remaining;
-
- /* Enable timer so that timer can continue
- TCR = 0xA1; */
- MC68230_WRITE (TCR, 0xA1);
-
- /* do not restore old vector */
- if ( Timer_driver_Find_average_overhead == 1 )
- return total; /* in countdown units */
-
- if ( total < LEAST_VALID )
- return 0; /* below timer resolution */
-
- /* Clocked at 6.5 Mhz */
- /* Avoid floating point problems, be lazy, and return the total minus
- the average overhead */
- return (total - AVG_OVERHEAD);
-}
-
-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;
-}